OIL RESISTANCE ENERGIZED BY - Lanxess · Page 1 of 32: This document contains important information and must be read in its entirety. 1 OIL RESISTANCE ENERGIZED BY …

Page 1 of 32: This document contains important information and must be read in its entirety. 1

OIL RESISTANCE ENERGIZED BY

High performance elastomer NBR from LANXESS. Highest quality standards such as excellent resistance to swelling in oils, lubriants, fuels, greases. www.hpe.lanxess.com

Edition 2013-01

Page 2 of 32: This document contains important information and must be read in its entirety.2

PROBLEMSEALS AND GASKETS MADE OF RUBBER WITH DUBIOUS ORIGIN


NO PROBLEMSEALS AND GASKETS MADE OF LANXESS NBR

Articles made of oil-resistant rubber are absolutely indispensable in mechanical, automotive and motor engineering, ensuring functional efficiency, durabi-lity and effective environmental protection. Krynac®, Perbunan® and Baymod® N – your assurance that there are no problems.


CONTENT

05 Introduction

n Perbunan® and Krynac® as base polymers for rubber parts

06 General properties

08 General purpose grades: Supplied in bale form

10 Distinguishing features of Perbunan® and Krynac®

10 Clean grades for highly efficient injection molding

11 Applications for Krynac® XL

12 Features of Krynac® X

n Favorable properties of Perbunan® and Krynac®

in rubber articles

14 Resistance to thermal oxidative aging

15 Low-temperature properties

15 Sealing force retention

16 Gaskets

17 Swelling and chemical resistance to media

18 Resistance to abrasion and wear

18 Resistance to gas permeation

19 Ozone and weather resistance

20 Applications in electrical technical articles

20 Physiological properties

n Baymod® N as polymeric additive for plastics

22 Grades for plastic modification

23 Abraison-, oil- and fuel-resistance

n Baymod® N as a polymeric component in friction parts

24 Grade for friction parts

25 Comparison of the coefficient of friction

n Examples for the use of LANXESS NBR

n Product ranges

27 Krynac®

28 Perbunan®

29 Baymod® N

29 Nanoprene®

n Contact data

30 Technical and commercial

n Quality and safety

31 Quality & Environmental management

31 Safety information


.

Krynac® Xcarboxylated

NBR

Perbunan®

fast curinglow mold fouling

Baymod® NNBR

ground powder

Krynac®

medium fastcuring

Krynac® XLpre-crosslinked

NBR

Baymod® N XLXL-NBR

ground powder

Baymod® N XLXL-NBR

spray-dried

NBR

XL-NBR

XNBR

NBR

LANXESS Emulsion Rubber S.A.S.

Bales for the rubber industry

Ground powder for the plastics

and rubber industry

Spray-driedpowder for

resinmodification

Introduction

Krynac®, Perbunan® and Baymod® N represent a comprehensive range of

solid acrylonitrile-butadiene copolymers manufactured by up-to-date emul-

sion polymerization techniques.

Based on a patent filed in 1930, this class of polymers has developed dynam-

ically and now has a broad spectrum of applications. In fact, NBR polymers

are essential for many industrial applications.

LANXESS offers the following main product lines:

For the rubber industry

Krynac® and Perbunan® are NBR and XNBR (ISO 1629) specialty elasto-

mers for oil-resistant technical rubber articles with an excellent cost/perfor-

mance ratio. NBR elastomers are indispensable in the automotive industry, in

mechanical engineering installations and in other sectors, particularly the

building and consumer goods industries.

For composite gaskets

Baymod® N ground materials are used for high-quality gaskets. Baymod® N

powdered polymers give high-quality rubber compounds through continuous

mixing using extruders.

For the thermoplastics processing industry

The Baymod® N range comprises powdered materials for the modification of

thermoplastics especially PVC.

For the manufacture of friction parts

LANXESS offers spray-dried Baymod® N special grades as a polymer compo-

nent in brake and clutch friction parts.

Acrylonitrile butadiene copolymers are also contained in some solvent-

based adhesives. The Krynac®, Perbunan® and Baymod® N grades are

manufactured at LANXESS Emulsion Polymers S.A.S. in La Wantzenau,

France. LANXESS Emulsion Polymers is committed to LANXESS’s general

“Quality and Environmental Policy” (LANXESS AG, Quality and Environ-

mental Policy, Issue Sept. 2007) claiming that “environmental protection,

health, safety and quality are accorded the same priority as commercial

efficiency”. The company is certified to DIN EN ISO 9001 : 2000 and

EN ISO 14001: 2004.

State-of-the-art emulsion polymerization includes the use of biologically

degradable chemicals (especially emulsifiers), the avoidance of chemi-

cals that could generate toxic, volatile N-nitrosoamines, and reducing to a

minimum the formation of residual monomers like free acrylonitrile and

butadiene and miscellaneous volatile organic compounds (“VOCs”).

Most of the grades meet the requirements of the relevant specifications for

food-grade rubber articles intended for repeated use according to FDA CFR

§ 176 000, including § 180.22, and the provisions of BfR, Recommen-

dation XXI, including the acrylonitrile migration limits referred to therein.

Nevertheless, users must contact their technical/commercial partner at

LANXESS to obtain written confirmation that the product is suitable for the

intended application.

Krynac®, Perbunan® and Baymod® N polymers do not decompose under

normal processing conditions. In the absence of oxygen no significant

decomposition occurs up to 600 °C. In the event of fire, carbon dioxide,

water and nitrogene oxides are mostly formed, provided there is sufficient

oxygen present.

Our NBR product range and the data sheets can be found at:

www.hpe.lanxess.com

KRYNAC®

PERBUNAN® BAYMOD® N

NBR at a glance

Excellent resistance to swelling in oils /lubricants / fuels / greasesVolume swell (ASTM oil #3) <10% (110°C, 14d, 34% ACN)

Very good heat resistance Service temperature < 110-120°C (criterium 1000h)

Good low temperature flexibilityGlass transition temp: -50 to -5 °C

High level of mechanical properties Tensile strength up to 35 MPa

Hardness 25 to 95 Shore A

Low permanent setcompression set < 10% (70h / 100 °C)

Good abrasion and wear resistance Low gas permeability


1. General properties

Rubber articles based on Krynac® or Perbunan® are essentially characterized

by very good resistance to swelling in contact with mineral-oil-based fluids and

heat resistance up to 120 °C.

Typical rubber parts meet the requirements for the cateogories B (or C) and

cateogories H to F according to ASTM-D 2000.

In addition to outstanding resistance to most of the fluids used in industrial

installations, Krynac®/Perbunan® also exhibit favorable properties with regard

to abrasion and wear resistance, gas permeability and sealing force retention.

The spectrum of properties compared with EPDM, SBR, CR, CSM and ECO is

shown in Figs. 2 and 3.

Heavy-duty excavators: robust, safe and environmentally friendly hydraulics

with rubber parts based on LANXESS NBR polymers

The primary selection criteria for NBR are the acrylonitrile content (from

18 % to 50 %) and the Mooney viscosity (from 30 MU to 120 MU), both of

wich are important for the processing of the compounds and for the proper-

ties of the vulcanizates made from them.

Fig. 2: The spectrum of selected properties of NBR

compared with EPDM and SBR

Low-temperatureproperties

Heatresistance

Gaspermeability

Sealing forceretention

Oil resistance

NBR EPDM SBR

Resistance to abrasion and wear

Fuelresistance

Fig. 3: The spectrum of selected properties of NBR

compared with CR, CSM and ECO

ECOCR

Heatresistance

Gaspermeability

Sealing forceretention

Oil resistance

NBR CSM

Resistance to abrasion and wear Low-temperature

properties

Fuelresistance

KRYNAC® AND PERBUNAN®

AS BASE POLYMERS FOR RUBBER PARTS


The influence of the polymer Mooney viscosity on some processing proper-

ties is demonstrated below in Fig. 4.

The compound viscosity depends primarily on the polymer viscosity and is

also influenced by other compounding ingredients. The processing proper-

ties, and to some extent the vulcanizate properties, are influenced by the

viscosity of the compound, as shown in Fig. 5.

Most importantly, the acrylonitrile content determines the swelling

properties in non-polar media and the flexibility of the rubber parts at low

temperatures (Fig. 6).

The acrylonitrile content further impacts the diffusion of gases as the

impermeability is improved for vulcanizates with a high acrylonitrile

content.

Krynac® and Perbunan® are suitable for biodegradable hydraulic fluids.

The stress-strain properties, the permanent set properties, the wear

and abrasion resistance, and the resistance to thermo-oxidative aging

is optimized by appropriate compounding such as the choice of fillers,

plasticizers, crosslinking systems, antioxidants and other special additives.

Due to its structure, vulcanizates based on NBR generally have limited

resistance to ozone attack. Ozone-resistant articles are, in general, based

on fluxed NBR/PVC blends.

Fig. 4: The influence of the polymer viscosity on some polymer

properties and on processing and mixing

tackiness

low high

cold flow

green strength

mill processing

filler uptake

energy uptake

Fig. 5: The influence of the compound viscosity on some

properties

green strength

low high

mill processing / calendering

extrusion rate, surface and die swell

injection molding

vulcanizate properties

Fig. 6: The influence of the acrylonitrile content on

important properties

oil resistance

low high

low temperature properties

Polymer Acrylonitrile

content (%)

ML 1+4/100

°C (MU)

Krynac® XL 3470 34 70

Krynac® XL 3355 VP* 33 55

Krynac® XL 3025 29.5 70


Perbunan® is the product of choice for injection molding (photo: DESMA Elastomertechnik GmbH)



2. General purpose grades:

Supplied in bale form

Krynac® : medium-fast curing grades

Perbunan®: fast curing grades ; in addition; high

modulus of the vulcanizates.

Special purpose grades (Perbunan® and Krynac® )

Supplied in bale form

Perbunan® CHM -.grades (“clean high modulus”)

Perbunan® offering very good low temperature flexibility

Perbunan® grades of very high molecular weight

Perbunan® grades of very good resitance in mineral oils.

Krynac® grades with slow cure for excellent processing

safety

Krynac® - plasticizer extended grade

Krynac® grades with extremely good oil resistance

Krynac® grades of very high molecular weight

Krynac® pre-crosslinked grades

Krynac® X - carboxylated nitrile rubber

Baymod® N

Supplied in free-flowing powder form

Baymod® N - non-precrosslinked grades

Baymod® N XL – pre-crosslinked grades

The terms “fast cure”, “medium-fast cure” and “slow cure” refer to the cross-

linking activity in sulphur cured compounds, in which case they differ signifi-

cantly. The difference in “eV-cured” compounds is smaller. There si almost

no difference in peroxide cured compounds.

All Perbunan grades are fast curing polymers not showing big differences

between the various grades.

Within Krynac®, both medium-fast curing and slow curing cannot be doubt-

lessly identified by its character. Reference is made to the table in page 9,

in which “medium-fast” and “slow curing” grades are specifically addressed.

.

Pre-crosslinked grades contain gel. In contrast to all aother Perbunan® and

Krynac® grades they are not soluble in MEK.

The present range includes :


Fig. 7: Krynac® and Perbunan® grades according to their curing activity

Acrylonitrile

content (%)

slow cure medium fast cure fast cure fast cure “CHM”

< 25 Perbunan® 2255 F Perbunan® 1846 F

26 - 28 Krynac® 2860 F Krynac® 2640 F Perbunan® 2845 F Perbunan® 2831 F

Krynac® 2950 F Krynac® 2840 F Perbunan® 2870 F Perbunan® 2846 F

Krynac® 2850 F Perbunan® 2895 F

Krynac® 2865 F Perbunan® 28120 F

33 - 34 Krynac® 3360 F Krynac® 3330 F Perbunan® 3430 F Perbunan® 3431 F

Krynac® 3345 F Perbunan® 3445 F Perbunan® 3446 F

Krynac® 3370 F Perbunan® 3470 F Perbunan® 3481 F

Krynac® 3380 F

Krynac® 33110 F

35 - 36

39 - 41 Krynac® 4045 Krynac® 3950 F Perbunan® 3945 F Perbunan® 3976 F

Krynac® 3980 VP Perbunan® 3965 F

44 - 46 Krynac® 4450 F Perbunan® 4456 F

> 48 Krynac® 4955 VP Krynac® 4975 F

Raw material of Krynac® and Perbunan® looks the same. (Picture shows the

labeling of a unwrapped 25 kg bale of a Perbunan® grade.)

Delivery of Krynac® and Perbunan® : wrapped in light protective film.

eV crosslinking systemRhenocure® IS60/G750.4 phrVulkacit®NZ1.5 phrVulkacit®Thiuram2Vulkalent® 1

Krynac® 3445F

0 200 500

Time (sec)

Perbunan® 3445F

100

Tor

qu

e (d

Nm

)

30

25

20

15

10

5

0300 400

E

Fig. 8: Comparison of Krynac® and Perbunan®

compounds with eV crosslinking system

Fig. 9: Slow curing Krynac® Grade compared with an equivalent

Krynac® Grade with medium-fast Cure


3. Distinguishing features of Krynac® and Perbunan®

Differences in the polymerization recipe for Krynac® and Perbunan® result in

two non-corresponding ranges of products.

Krynac® and Perbunan® respond differently to typical curing agents for sulfur

and eV curing such as sulfur, sulfur donors and accelerators. Compared with

Krynac®, Perbunan® exhibits more rapid curing and a higher torque in the

rheometer curve. These differences are shown in Fig. 8

Consequently, Krynac® gives better processing reliability and longer shelf

life of the finished compounds, while Perbunan® grades enable short curing

cycles and provide a high level of physical properties.

4. Clean grades for highly efficient injection molding

Krynac® and Perbunan® are both highly suitable for molded articles due to

good scorch/cure relationship and high level of vulcanizate properties. The

compound viscosity can be adjusted easily by selecting polymers of a suitable

base viscosity from the extensive range of grades.

Addtionally, customers can take advantage of a special range of grades known

as Perbunan® CHM (CHM = Clean High Modulus) grades. These grades are

available in the range of Ml 1+4/100 °C = 30 – 80 MU and acrylonitrile

content = 18 – 45 %.

The key characteristics of the Perbunan® CHM polymers are, for example:

Almost no foreign matter resulting from the emulsion polymeriza-

tion process

Secondary components in the polymer do not cause substantial exudation

and mold fouling effects. Compounders are now able to add limited amounts

of processing agents to optimize the flow properties during molding, while

preserving the very good mold fouling resistance using their own experience

and in-house know-how.

Various static seals in a hydraulic

cylinder (pict.: Trelleborg)



Time min

MDR-Rheometer at 170°C

Polymers: Cross-linking system

(1) Krynac® 3950 F Sulphur 1,5 phr(2) Krynac® 4045 F Vulkacit® NZ 1,5 phr

0

5

10

15

0 1 2 3 4 5Time min

Torque dNm


MDR Rheometer at 130 °CCompound:hydraulic hose gradeH~75 Shore A

Perbunan® 2845F

0 1000 3500

Time (sec)

Perbunan® 2846F

500

S’ (

dN

m)

35

30

25

20

15

10

5

01500 2000 2500 3000

Krynac® 2750F

M100 (MPa): 2846F: 7.42845F: 7.02750F: 6.6

Always full speed ahead with Krynac® and Perbunan®: marine propeller

seals

Fig. 10: Curing behavior of a typical Perbunan® CHM grade com-

pared with Krynac® and Perbunan® standard grades

Optimum crosslinking density

Due to their special manufacturing technology Perbunan® CHM grades

act as “modulus boosters” in vulcanizates. Their sealing force retention

properties are also excellent.

Very good relationship between low-temperature flexibility and

swelling properties in oil

Perbunan® 1846 F and Perbunan® 2846 F are base polymers for seals

used at extremely low temperatures (down to -40 °C) and high tempera-

tures (up to 120 °C).

Corrosion

As a clean polymer Perbunan® CHM has no measurable corrosion activity. It

contains only traces of inorganic chlorine, making it ideal for corrosion-proof

seals.

Easy post-treatment of finished articles, if required

Some seals have to be treated after finishing in order to improve the smooth-

ness of the surface, which is sometimes affected by foreign constituents in

the polymer. Generally speaking, these have no impact if Perbunan® CHM

grades are selected.

Low migration

For example, the migration requirements specified in many regulations

for food-grade articles intended for repeated use are more easily met with

Perbunan® CHM polymers.

5. Applications for Krynac® XL

Pre-crosslinked polymers (Krynac® XL) significantly improve the extrusion

behavior of NBR compounds with respect to several properties, such as:

extrusion speed (commercial aspect)

surface smoothness of the extrudates (quality issue)

die swell and good collapse resistance (better dimensional control)

Krynac® XL grades are preferably used in blends with non-pre-crosslinked

Krynac® or Perbunan® grades. Compared directly with general NBR polymers

some stress-strain properties such as tensile strength and elongation at break

are lower.

Krynac® XL is effective in boosting the modulus. Compounders should take

advantage of this in order to design high modulus compounds.

NBR

Heatresistance

Stress-strainproperties

Processing

Low-temperaturestiffness

Wear and abrasionresistance

Extrusionresistance

Polymer rheology

Krynac® X

Zinc oxide particles

Carboxyl groups

Nitrile groups

Polymer chain

Fig. 11: Properties of Krynac® X compared

with NBR

Fig. 12: Cluster model of the structure of zinc-oxide-crosslinked

XNBR (in addition to common sulphur and peroxide crosslinking)


6. Features of Krynac® X

Krynac® X opens up new opportunities for NBR compounding. During emul-

sion polymerization a third monomer, an unsaturated carboxylic acid, is intro-

duced in order to provide a number of specifically improved properties, e.g.:

wear and abrasion resistance

sealing force retention especially to achieve very good extrusion resistance

high-modulus stress-strain characteristics at reasonably low hardness.

However, attention must be paid to the more difficult rheological properties,

and hence processing, as well as to the lower level of heat resistance of the

vulcanizates compared with standard NBR. The carboxylic acid monomer

also impairs the low-temperature flexibility of the vulcanizates.

The properties of Krynac® X compared with NBR are summarized in Fig. 11.

In addition to this general spectrum of properties Krynac® X vulcanizates differ

from NBR by exhibiting:

hydrophilic surfaces – vulcanizates are wetting protic fluids

direct bonding to several polyamide semi-crystalline thermoplastic poly-

mers (It is worth noting that in this case compounds requiring peroxide cross-

linking without the addition of metal oxides are preferred.)

Metal oxides are effective as additional crosslinking agents for Krynac® X.

In general, compounds based on this polymer have to include metal oxides

(almost exclusively various zinc oxides) as a component (see Fig. 12).

Due to this effect, care must be taken, when handling the compounds to:

add the zinc oxides to the compounds together with the common

accelerators

control the storage of the finished compound as zinc-oxides are already

effective as crosslinking agents at room temperature.

Cable-controlled gearshift manufacture

using direct 2-component technique

(photo: Schneegans)




Industrial cotton processing: ring spinning machines producing thread...

Conveyor belts used for mail sorting: Krynac® X helps to reliably distribute

70 million letters to 40 million destinations every day

...with rubber parts based on Krynac® and Perbunan®

Fig. 14: The Gordon-Taylor relationship for Krynac® and

Perbunan® raw polymers

Fig. 13: Arrhenius graph for typical Krynac® and Perbunan®

vulcanizates

(°C)

composition with optimum hot air resistance

standard composition

log

t (

d)

for

EB

=E

B °

/2

3.0

2.5

2.0

1.5

1.0

0.5

02 2.2 2.4 2.6 2.8

1/T (10-3 °K-1)

3.0 3.2

227 181 144 112 84 60 39

~120 °C ~108 °C

42d=1000h

Test method: Differential scanning calorimetry (DSC)

VDA...

Tg

(°C

)

0

-10

-20

-30

-40

-50

-6025 30 35 40

Acrylonitrile content (%)

45 50

y=1.4818x - 76.108R2=0.9948

10 15 20


7.1 Resistance to thermal oxidative aging

Increasing hardness and modulus and reduced elongation at break are

typically observed when vulcanizates based on Krynac® and Perbunan® are

exposed to hot air at elevated temperatures.

The resistance to thermal oxidative aging can be controlled by appropriate

compounding ingredients such as:

Antioxidants

The synergetic combination of:

Vulkanox® HS: 1.5 phr

Vulkanox® MB2: 1.5 phr

is generally recommended. Another possible system is based on derivatives

of diphenylamine and Vulkanox® ZMB2 (not recommended for Krynac® X).

If the relevant food-grade regulations have to be respected, bisphenolic

antioxidants (Vulkanox® BKF or Vulkanox® SKF) have to be used.

The choice of filler system

Fillers based on active silica (e.g. Vulkasil® S or Vulkasil® N) are necessary for

optimal resistance to thermal oxidative aging. Mercapto silanes for eV-cross-

linked systems or vinyl silanes for peroxide crosslinked vulcanizates (using an

appropriate mixing technique) are helpful to achieve the desired stress strain

properties. Fillers that are already modified with silanes are, in principle, able

to achieve similar effects.

Further requirements

It should be noted that an eV curing system is recommended. Peroxide cross-

linking systems that (are popularly known to) result in heat-resistant crosslinks

do not achieve a superior level of heat resistance.

Heat-resistant vulcanizates should not contain more than the necessary quan-

tities of plasticizers. Vulkanol® OT shows further slightly favorable effects.

Assuming these recommendations are followed, vulcanizates of Krynac®

and Perbunan® are capable of resisting temperatures of up to 120 °C/

1000 h, as shown in the Arrhenius formulation (Fig.13).

Leakage-free seals at very low and high temperatures

in shock absorbers

FAVORABLE PROPERTIES OF KRYNAC® AND PERBUNAN®

IN RUBBER ARTICLES


Fig. 15: Low-temperature properties of vulcanizates based on Krynac® and Perbunan®

Base polymer: Perbunan® 1846F (18 % acrylonitrile content)

Method Specification Physical property Standard compound,

70 Shore A

Compound with best low temperature

flexibility, 70 Shore A

Differential scanning

calorimetry (compound)

VDA Glass transition

temperature (°C)

-50

Torsional pendulum test DIN Temperature at

maximum

damping (°C)

-36 -45

Tension retraction test

(TR)

ASTM TR-10 -47 -53

TR-30 -43 -48

TR-50 -40 -43

TR-70 -36 -38

Compression set

at 20 °C (24h/-20 °C)

DIN 53517 CS (%) 17 20

Brittleness point BP (°C) -60 -64

Low-temperature

bending at -50 °C

o.k. o.k.

7.2 Low-temperature properties

Krynac® and Perbunan® grades are amorphous polymers. The ratio of acry-

lonitrile and butadiene determines the glass transition process producing a

strong linear relationship between the glass transition temperature and the

acrylonitrile content (Gordon-Taylor relationship; Fig. 14).

A similar graph (but shifted to higher temperatures) can be obtained for

the characteristics of test methods on vulcanizates such as the TR test (e.g.

TR10), the Gehman Test (e.g. T-10) and dynamic mechanical test methods

to evaluate the visco-elastic properties (for example the maximum of the loss

modulus or the tan δ and the maximum of damping measured by torsional

pendulum tests).

The glass transition process can be successfully shifted to even lower tempera-

tures by means of plasticizers. This effect depends on the type and amount of

plasticizers used in the compound.

Brittle tests and usually low-temperature bending tests are used to determine

the mechanical properties at the test temperature. As these properties are also

significantly dependent on compounding ingredients like fillers and crosslink-

ing systems, they cannot be represented by a simple Gordon-Taylor relation-

ship.

Perbunan® 1846 F is recommended to meet most stringent low-temperature

requirements. A typical set of properties is shown in Fig. 15.

7.3 Sealing force retention

The majority of industrial and automotive oil seals are NBR-based. In addition,

tight sealing properties are also indispensable for different technical rubber

articles such as hoses and tubes.

Basic information about the sealing forces of vulcanizates relates to com-

pression set measurements. Depending on the test temperature, a typically

“trough-shaped” curve is found, as shown in Fig. 16 (see following page).

These curves show three characteristic areas:

The low-temperature branch: depends entirely on the acrylonitrile content,

is best for Perbunan® 1846 F

The average-temperature branch is that in which no aging effects are to be

considered. This level can be controlled by other compounding ingredients,

for example, or by the crosslinking system. For superior results, straight sulfur

curing should be used. eV curing and peroxide curing give slightly inferior

levels.

The high-temperature branch reflects the effects of aging, thus showing best

results for peroxide curing, followed by eV curing and sulfur curing.

Method: continuous compressive stress relaxation, test equipment: Elastocon AB

F: force depending on the test time; F=F(t); F0: starting force

Compound: O-ring type, 70 Shore A, eV cure. Base polymer: Perbunan® 3430F

F/F

0

1.00

0.90

0.80

0.70

0.60

0.50

0.40

0.30

0.20

-3.00

Log time of exposure

-2.00 -1.00 0.00 1.00 2.00 3.00

1/e relaxation time (�)

34 % 39 %

acrylonitrile content

Com

pre

ssio

n S

et (

DIN

53

51

7)

(%)

100

90

80

70

60

50

40

30

20

10

00 20 40 60

Temperature (°C)

80 100-60 -40 -20 120 140

18 % 28 %

Fig. 16: Typical plot of the compression set properties of

eV-cured Krynac® and Perbunan® vulcanizates of varying

acrylonitrile content

Fig. 17: Continuous compressive stress relaxation plot for

Perbunan® vulcanizates, test temperature 110 °C


Seals are effective as long as they are capable of preventing leakages. There-

fore, to a large extent, the decline in sealing force determines their service life.

Continuous Stress Relaxation (CSR) which is specified in ISO 2294 (1998)

is the most effective method of determining the change in the sealing power

under stress.

During CSR measurements, the retention force is recorded along with the

time of exposure. Under aging conditions, there is usually a decrease as a

consequence of aging effects. The relaxation time τ, which is identical to

the time when the relaxation index F/Fo reaches 1/e, is characteristic for

the vulcanizates involved (Fig. 17).

At a test temperature of 110 °C, relaxation times of almost 1000 h are

typically found for Krynac®- and Perbunan®-based vulcanizates with good

heat resistance.

7.4 Gaskets

Powdered polymers such as the Baymod® N grades are needed as

elastic binding agents for various fibers in gaskets. In plant constructions

such gaskets in flange joints must be reliable and durable. They have to

prevent leakages under high pressure conditions and in potentially

aggressive chemical environments. They must also be able to withstand

temperatures up to 300 °C.

Various regulations have been drawn up to protect our environment from

undesired contamination. The German “TA LUFT” (Technical Instructions on

Air Quality Control), published by the Federal German Ministry for the Envi-

ronment on July 30, 2002, is one example. Baymod® N plays an important

role in this complex, multi-component systems.

These kinds of gaskets should preferably manufactured using the free-flowing

powdered polymers Baymod® N 34.52 and Baymod® N 34.82, which allow

easy and exact dosage. The polymer powder particles of approx 0.4 – 0.7

mm diameter are gel-free, otherwise complete solution in solvents like tolu-

ene or ethanol (or blends thereof) would not be possible.

After dissolving the polymer, various fillers, fibers, additives and the curing

agents are added. This compound is applied to the hot mill of a calender

where a thin layer is formed. In this process step the solvent is removed and

the curing is initiated. Subsequently the gasket is built up layer by layer until

the final thickness is reached. After calendering, the sheets are cured further

in an oven. Finally the gaskets are punched out of the gasket sheet.

Flange gaskets based on Baymod® N meet the requirements...

FAVORABLE PROPERTIES OF KRYNAC®, PERBUNAN® ANDBAYMOD® N IN RUBBER ARTICLES


aromatic hydrocarbons

alkanes

200

150

100

50

012

solubility parameter (MPa)1/2

16 20 24 28 32 36

methyl ethyl ketone

ethyl acetate

toluene

diethylether ethanol methanol glycerol

acids

water

alcohols

halo hydrocarbons phenols

ethers polyhydric alcohols

esters

isooctane

� w

eig

ht

Data are typical for medium acrylonitrile polymers

aromatic hydrocarbons

alkanes

� w

eig

ht

50

40

30

20

10

012

solubility parameter (MPa)1/2

16 20 24 28 32 36

IRM 903

acids

alcohols

halo hydrocarbons phenols

ethers polyhydric alcohols

esters

ASTM C

standard fuel acc. to ASTM D 471-79

standard oil IRM

brake fluid

ASTM B

ASTM A

IRM 902IRM 901

Fig. 19: Swelling of Krynac® and Perbunan® vulcanizates in

standard fluids

Fig. 18: Swelling of Krynac® and Perbunan® vulcanizates in

organic liquids

7.5 Swelling and chemical resistance to media

When selecting a suitable base polymer for a pre-defind rubber-based

system, there are a large number of industrial organic and inorganic fluids

that have to be taken into account.

Attempts are made below to define pro and con principles for Krynac®/

Perbunan® vulcanizates. The reader is advised to consult further literature or

to contact the LANXESS Technical Service Representatives for details.

For organic fluids the solubility parameters (δ [(MPa)1/2) can be taken as a

guide which, according to Hildebrand, are connected with the heat of vapor-

ization (See for example: Solubility Parameters: Theory and Application in The

Book and Paper Group ANNUAL, Volume 3, 1981 (John Burke) (http://aic.

stanford.edu/sg/bpg/annual/v03/bp03-04.html.) The solubility parameters

range from ~10 MPa1/2 to ~40 MPa1/2.

Fig. 18 gives a general survey showing that NBR-vulcanizates are poorly

compatible with non-polar solvents (alkanes) and with highly polar liquids

(e.g. some alcohols and multivalent alcohols). However, caution is also

appropriate with regards to ketones, ethers, organic acids, organic acid

esters, aromatic hydrocarbons and halo-hydrocarbons, for example. Conse-

quently, standard fluids according to ASTM D 5964-07 like IRM 901, IRM

902 and IRM 903 as well as reference fuels according to ASTM D 471 like

ASTM fuel A, ASTM fuel B and ASTM fuel C are widely used when choosing

a suitable material (Fig. 19).

It should also be noted that:

Swelling depends strongly on the acrylonitrile content. High levels of acrylo-

nitrile lead to smaller changes in volume and weight.

Swelling does not take into account possible chemical reactions caused by

the fluid, by decomposition products of the fluids, or by components in the fluid

reacting with the NBR polymer.

Swelling is a process depending on time and temperature.

If the compound comprises constituents that are potentially extractable, thus

migrating into the fluid (e.g. plasticizers), swelling will be significantly influenced.

Resistance to water and aqueous media

Provided the composition of the compound is correct, vulcanizates based

on Krynac® and Perbunan® are fairly resistant in aqueous media. The level

of swelling does not significantly depend on the acrylonitrile content. In

addition, good resistance is mostly found in diluted inorganic bases, like

caustic soda solution, for example. The resistance in diluted inorganic acids

is inferior, and generally limited to ambient temperature conditions.

Oxidizing acids often cause irreversible changes in the vulcanizates.

...of the German Technical Instructions on Air Quality Control

nitrogen nitrogen

Coe

ffic

ien

t of

per

mea

tion

(1

01

7 K

D [

m/s

Pa]

) 300

250

200

150

100

50

0

NBR 18* NBR 28* NBR 34* NBR 39* CSM CR SBR NR VMQAUIIR

>3000

air air * ACN content (%)

Fig. 20a: Diffusion of nitrogen and air

Comparison of Krynac® and Perbunan® with various other elastomers at 60 °C


7.6 Various other properties

7.6.1 Resistance to abrasion and wear

Reinforced vulcanizates based on Krynac®/Perbunan® have fairly good

resistance to abrasion and wear. In fact, Krynac®/Perbunan® is the first

choice if oil resistance is also required.

Compared with other polymers, the order is as follows:

BR < NBR < NR, SBR

Within the range of NBR polymers, Krynac® X has the best wear and

abrasion properties (see section 6)

7.6.2 Resistance to gas permeation

Vulcanizates based on Krynac® and Perbunan® are recommended base

materials for barrier membranes against a variety of gases like air, nitrogen,

hydrocarbons, refrigerants and carbon dioxide.

The permanent dipole moment of the CN-group prevents (non-polar) gases

from diffusing freely through the elastomer matrix. Base polymers with a high

acrylonitrile content are preferably used. High acrylonitrile polymers enable

a similar level of tightness to that of IIR. The permeation coefficient of various

other elastomers is significantly higher, of course (see Figs. 20a and 20b).

Brake shims: quieter and more comfortable ... ....with Perbunan®


IN RUBBER ARTICLES


* ACN content (%)

Coe

ffic

ien

t of

per

mea

tion

(1

01

7 K

D [

m/s

Pa]

) 2000

1800

1600

1400

1200

1000

800

600

400

200

0NBR 18* NBR 28* NBR 34* NBR 39* CSM CR SBR NR VQMAUIIR

>9000

Fig. 20b: Diffusion of carbon dioxide

Comparison of Krynac® and Perbunan® with various other elastomers at 60 °C

Compounding advice:

The following principles concerning compounding are recommended to

minimize permeation further.

Set the filler content to the maximum level permitted by the specification.

Possibly use special fillers like mica, graphite or diatomaceous earth.

If possible, avoid plasticizers and other liquid additives.

7.6.3 Ozone and weather resistance

Like any other double-bond-containing elastomers, vulcanizates based on

Krynac®/Perbunan® are sensitive to ozone attack.

Without antiozonants:

Low acrylonitrile polymers are more sensitive than high acrylonitrile

polymers

With suitable antiozonants (p-phenylenediamines, Vulkanox® 4020):

Low acrylonitrile polymers become more resistant than high acrylonitrile

polymers.

In general, even well-protected vulcanizates cannot withstand extreme condi-

tions. This is due to the fact that antiozonants become compatible with the

polymer at an increased level of polarity and are then no longer effective in

protecting the surface against ozone.

It is important to note that fluxed blends of NBR and PVC show very good

ozone resistance. Cracks are not formed even under severe test conditions.

Antiozonants enhance this effect, but are not absolutely essential. Vulcani-

zates of this kind are very suitable for weather-resistant applications.

Blends of Krynac®/Perbunan® and EVM (Levapren®) also improve the ozone

resistance significantly.

When it comes to safety: Perbunan®.


7.6.4 Applications in electrical technical articles

Acrylonitrile butadiene rubbers are frequently used in cable compounds

including elastomers. The following are some examples:

Anti-adhesion properties: semi-conductive layers in heavy-duty cables are

mostly based on blends of ethylene vinylacetate rubber, EVM (Levapren®)

and Krynac® and Perbunan® (or, if continuous processing from the very

beginning is required: Baymod® N).

For cable sheating vulcanizate blends of Krynac®/Perbunan® and PVC are

state-of-the-art to achieve ozone resistance and oil resistance where required.

For a halogen-free version, blends of Krynac®/Perbunan® and EVM

(Levapren®) are recommended.

As polymers produced by emulsion techniques, Krynac®, Perbunan® and

Baymod® N have limited uses as base polymers for insulation compounds.

7.6.5 Physiological properties

The use of Krynac® and Perbunan® in technical rubber goods with which

humans come into contact generally poses no problems, although some

special aspects have to be taken into consideration, depending on specific

laws and regulations.

Rubber articles intended for repeated use in contact with vegetable oils,

fats and greases are permitted by almost all governmental and international

regulations.

For example the US FDA regulation CFR 21 § 177.2600 includes NBR,

provided the extraction limits according to CFR 21§180.22 are adhered to

the vulcanizate.

Regarding the German BfR (Federal Institute for Risk Assessment) Recom-

mendation XXI permits NBR as well if the migration limits are not exceeded.

In general, Krynac® and Perbunan® polymers are well suited to these require-

ments, although some grades are excluded. Therefore, in case of interest, the

reader is requested to contact LANXESS TRP for confirmation.

Rubber articles for potable water applications

The regulations in this area of application differ considerably from country to

country. In general, Krynac® and Perbunan® are both possible candidates.

Provided the strict rules of compounding are followed, the requirement

regarding organoleptic properties, for example, are fulfilled. LANXESS is

prepared to disclose confidential details of the polymer composition to the

local authorities upon request.

Rubber articles in pharmaceutical use

Krynac® and Perbunan® have proved themselves in some seals and gaskets

in pharmaceutical applications.

Milking machine with rubber components approved for food contact


IN RUBBER ARTICLES

Ideally suited for use in hygienically sensitive areas.


Attractive and tough: non-corrosive and flame-retardant floorings

based on Krynac® (pict.: nora systems GmbH)

Com

pre

ssio

n s

et 2

4h

/RT

(%

) 45

40

35

30

25

20

Amount of low molecular weigth plasticizer

Baymod® N XL 32.32 (parts per 100 in PVC)

0 10 20 30 40

80 %

60 %

Fig. 21: Favorable extrusion properties achieved with

pre-crosslinked Baymod® N

Baymod® N grades for plastic modification

non pre-crosslinked pre-crosslinked

Baymod® N grade 34.52 34.82 34.92 VP XL 32.32 XL 32.12

acrylonitrile content* (%) 33 33 33 31.5 31.5

ML 1+4/100 °C (MU) 40-50 65-75 80 35-60 35-60

average particle diameter (mm) 0.7 0.7 0.6 0.4 0.4

partitioning agent calcium stearate calcium stearate silica PVC silica

Application of Baymod® N in PVC modification

favorable properties

Crashpad skins low level of fogging,

good dimensional stability

Sheeting good permanent flexibility, low migration,

low volatility and extraction of the plasticizer

Oil and fuel hose good resistance to oil and gasoline,

low migration of the plasticizer

Profiles improved low temperature flexibility,

improved compression set

Cables good physical properties,

good low temperature flexibility

Conveyor belts good resistance to oils and greases,

long service life

Shoe soles good mechanical properties,

good abrasion and wear resistance

The basic effect of pre-crosslinked Baymod® N XL 32.32 in PVC:

Improvement of the compression set


Acrylonitrile butadiene copolymers in some cases form a uniform mixed

phase in blends with some polar thermoplastic polymers, e.g. PVC.

PVC is a rigid material. Monomeric plasticizers convert rigid PVC into a soft

material that stays flexible over a wide range of lower temperatures.

Flexible acrylonitrile butadiene polymers have a similar effect. This set of

properties can be achieved with the ground acrylonitrile butadiene polymers

of the Baymod® N range, which is summarized in the following table.

Pre-crosslinked Baymod® N grades give better extrusion performance and

surface characteristics of the finished profile, while non-pre-crosslinked

polymers are primarily recommended for molded parts.

Figure 21 shows the effect of non-pre-crosslinked and pre-crosslinked

Baymod® N grades on the extrusion performance of a PVC compound.

BAYMOD® N AS POLYMERIC ADDITIVES FOR PLASTICS

Pre-crosslinked Baymod® N XL 32.32

Non pre-crosslinked Baymod® N 34.52

Non pre-crosslinked Baymod® N 34.82

* measured on the base rubber before grinding


Baymod® N XL 32.32 monomeric standard plasticizer

Vol

um

e lo

ss (

mm

3)

160

140

120

100

®

Parts by weight of NBR/monomeric standard plasticizer

0 10 20 30 40

Wei

gh

t lo

ss (

%)

0

-5

-10

-15

-20

-25



0 10 20 30 40


Wei

gh

t lo

ss (

%)

0

-5

-10

-15

-20

-25

-30

®


0 10 20 30 40

Fig. 22: Abrasion resistance

(DIN 53516)

Fig. 24: Oil resistance

(IRM 903; 168 h; 100 °C)

Fig. 23: Fuel resistance

(Iso-octane/toluene 70/30; 70 h, 22 °C)

Pre-crosslinked NBR polymers in PVC help to develop the rubber-like dry

feeling of thermoplastic articles with good mechanical properties such as

low abrasion and low compression set values. Pre-crosslinked NBR polymers

enhance the resistance to oil and fuel. Increased resistance (from regular to

permanent) can be achieved for diluted mineral acids and bases.

Unlike common plasticizers, compatible polymeric materials migrate less

under extractive conditions, which is essential for some applications. They

also generate a minimum of evaporation loss under heat and irradiation

conditions and thus are outstanding with regard to the fogging properties

of the thermoplastic part.

To summarize: The addition of Baymod® N to PVC compounds improves

the abrasion resistance and enables compliance with the requirements of

safety footwear, for example (see Fig. 22).

Flexible PVC plasticized with monomeric plasticizers becomes brittle and

rigid due to plasticizer migration when exposed to extractive media such as

fuels. The addition of Baymod® N makes it possible to reduce the level of

extractables significantly (see Fig. 23).

Baymod® N has a positive impact on the swelling resistance of PVC-based

articles in oils and technical fluids (see Fig.24).

Apart from PVC, NBR-modifying polymers are also recommended for linear

polyamides (PA) and acrylonitrile-butadiene-styrene-based materials (ABS).

Examples of PVC-based articles that require the additional use of Baymod® N

are door and window sealing strips, refrigerator seals, spiral hoses, tubes for

air and water, conveyor belts, tarpaulins and safety footwear.

Baymod® N is a valuable asset in the building industry

Fig. 25: Improvement of the impact resistance of phenolic resins

by adding Baymod® N XL 38.43

Imp

act

resi

stan

ce(k

j/m

2) 25

20

15

10

5

0

Baymod® N XL 38.43 (weight %)

0 5 10 15 20

Baymod® N grade for friction parts

pre-crosslinked / spray-dried

Baymod® N grade XL 38.43

acrylonitrile content* (%) 34

ML 1+4/100 °C (MU) -

average particle diameter (mm) 0.12

partitioning agent CaCO3

Fig. 26: Particle structure of Baymod® N XL 38.43 compared with Baymod® N 34.52


BAYMOD® N AS A POLYMERICCOMPONENT IN FRICTION PARTS

The main purpose of a friction material is to stop the vehicle by converting

mechanical energy smoothly and in a controlled fashion into heat. In practice,

brake units can heat up to such an extent that heat dissipation may become a

problem. Friction material should have a stable friction coefficient (µ) suitable

for the application. This should remain constant throughout the material’s life

under all conditions of temperature and pressure.

The coefficient of friction is the key property of friction linings and pads.

Baymod® N XL 38.43 increases the coefficient of friction just in the tempera-

ture range of 50 °C to 200 °C, where most braking action starts to take place

(see Fig. 27).

Safety and reliability are key terms in brake and clutch lining technology for

which acrylonitrile-butadiene copolymers are essential components in mix-

tures containing phenolic resins and various other inorganic and organic

ingredients. NBR rubber is an effective binder to increase the flexibility of

friction materials. Rubber is also active as a material that encapsulates the

abrasive powders, thus decreasing wear of the metal rotor.

LANXESS has developed a free-flowing grade which is tailor-made for this

application the spray-dried grade Baymod® N XL 38.43 (properties see

table). In the microscopic image (see Fig. 26) the spray-dried Baymod® N

XL 38.43 is compared with ground Baymod® N 34.52.

The spray drying process leads to regular spherical particles with an

average diameter of 20 µm. This structure allows homogenous distribution

in the mixtures for pads prior to hardening.

By contrast, a ground polymer like Baymod® N 34.52 consists of particles

that are fairly coincidental and irregular as a result of the grinding process,

and is less favorable in brake and clutch pad applications.

Baymod® N XL 38.43 is used as a modifier for phenolic resins. A significant

increase in the Charpy impact resistance can be observed when Baymod® N

XL 38.43 is added (see Fig. 25).

* measured on supplied material


Coe

ffic

ien

t of

fric

tion

0.7

0.6

0.5

0.4

0.3

0.2

0.1

0.0

Baymod® N XL 38.43 without Baymod ® N XL 38.43

Temperature (°C)

0 100 200 300 500400

Baymod® N XL 38.43 ensures controlled braking under difficult conditions

Fig. 27: Comparison of the coefficient of friction at

various temperatures

Safely down the road with a heavy load....


Technical foams made from Perbunan® for

reliable pipe insulation against heat and cold

Machine overbraiding hoses with metal or textile

(photo.: Herzog)

Oil-resistant Perbunan® keeps print rollers rolling

without fatigue

Marathon-tested soles made of Krynac® with high resistance to wear and abrasion

EXAMPLES FOR THE USE OF KRYNAC®, PERBUNAN® AND BAYMOD® N


Product range and typical properties

Acrylonitrilecontent (%)

Mooneyviscosity(1) ML 1+4/100°C (MU)

Density(g/cm3)

plasticizer content (phr)

Supplyform

Standardpackaging

Remarks

General purpose grades, medium-fast curing

Krynac® 2645 F 26.0 45 0.96

bales

25 kg bales on

pallets, contents:

900 kg or 1050 kg

Krynac® 2840 F 28.0 38 0.96

Krynac® 2850 F 27.5 48 0.97

Krynac® 2860 F 28.0 60 0.97

Krynac® 3330 F 33.0 30 0.97

Krynac® 3345 F 33.0 45 0.97

Krynac® 3370 F 33.0 70 0.97

Slow curing grades

Krynac® 2950 F 30.0 53 0.97

bales

25 kg bales on

pallets, contents:

900 kg or 1050 kg

Krynac® 3360 F 33.0 57 0.97

Krynac® 4045 F 38.0 45 0.97

Krynac® 4450 F 43.5 50 1.00

Krynac® 4955 VP* 48.5 55 1.01

High molecular weight grades (medium-fast curing)

Krynac® 3380 VP* 33.0 80 0.97bales

25 kg bales on pallets, contents: 900 kg or 1050 kg Krynac® 33110 F 33.0 110 0.97

Plasticizer-extended grade (phthalate free)

Krynac® M 3340 F 22.0 34 0.98 52 bales 25 kg bales on pallets, contents: 900 kg or 1050 kg

for soft vulcanizates; plasticizer Mesamoll®

High oil resistant grades (medium-fast-curing)

Krynac® 3950 F 38.5 50 0.99

bales

25 kg bales on

pallets, contents:

900 kg or 1050 kg Krynac® 4975 F 48.5 75 1.01

(1) unmassed, ISO 289 (2) massed * Trialproduct (VP=Versuchsprodukt), please see page 30.

Pre-crosslinked grades


Mooney

viscosity(1) ML1+4/100°C (MU)

Density (g/cm3)

pre-crosslink characteristics

Supplyform

Standardpackaging

Remarks

Krynac® XL 3025 29.5 70 0.96 medium

25kg bales on pallets, contents 900 kg or 1050 k

Krynac® XL 3355 VP* 33.0 55 1.00 high bales

Krynac® XL 3470 F 34.0 70 (2) 0.99 high

Carboxylated grades


Mooney

viscosity(1) ML1+4/100°C (MU)

Density (g/cm3)

Carboxylicacid (%)

Supplyform

Standardpackaging

Remarks

Krynac® X 146 32.5 45 0.97 1

bales

25kg bales on

pallets, contents

900 kg or

1050 kg

for excellent wear

and abrasion

resistance,

high modulus

vulcanizates

Krynac® X 160 32.5 58 0.97 1

Krynac® X 740 26.5 38 0.99 7

Krynac® X 750 27.0 47 0.99 7

For the grades Krynac® 4045 F, Krynac® 4450 F and Krynac® 4955 VP* are slow curing grades see list of „slow curing grades“

for improved extrusion and calendering (processing rate,lower shrinkage,better collapse resistance, surface)

excellent processing safety, good storage capability of cured compounds

for soft vulcanizates / vulcanizates with best vulcanizate properties

excellent oil resistance, good resistance against fuels


General purpose grades, fast curing


Mooneyviscosity (1) ML1+4/100°C (MU)

Density(g/cm3)

Supplyform

Standardpackaging

Remarks

Perbunan® 2845 F 28.0 45 0.96

bales

Perbunan® 2870 F 28.0 70 0.96

Perbunan® 3430 F 34.0 32 0.97

Perbunan® 3445 F 34.0 45 0.97

Perbunan® 3470 F 34.0 70 0.97

Clean high modulus grades (CHM-grades), fast curing

Perbunan® 2831 F 28.6 30 0.96

Perbunan® 2846 F 28.6 42 0.96

Perbunan® 3431 F 34.7 29 0.97 bales

Perbunan® 3446 F 34.7 42 0.97

Perbunan® 3481 F 34.7 78 0.97

Perbunan® 1846 F belongs to the group of CHM grades, as well

Grades with very good low temperature flexibility

Perbunan® 1846 F 18.0 45 0.93

bales Perbunan® 2255 VP* 22.0 57 0.94

High molecular weight grades

Perbunan® 2895 F 28.0 95 0.96

bales Perbunan® 28120 F 28.0 120 0.96

High oil resistance grades (medium-fast-curing)

Perbunan® 3945 F 39.0 45 0.99

bales

Perbunan® 3965 F 39.0 65 0.99

Perbunan® 3976 VP* 40.0 65 0.99

Perbunan® 4456 F 44.0 55 1.01

Perbunan 3976 VP * and 4456 F belong to the group of CHM grades, as well

(1) unmassed, ISO 289

* Trial product (VP=Versuchsprodukt), please see page 30.

25 kg bales on pallets, contents: 900 kg or 1050 kg

25 kg bales on pallets, contents: 900 kg or 1050 kg

25kg bales on pallets, contents: 900 kg or 1050 kg



„low mould fouling“ grades,best vulcani-zate properties, low level of extractables, recommended for potable water

For seals and other articles with stringent low temperature requirements

excellent oil resi-stance, good resistance against fuels

for soft vulcanizates; good dynamic properties



Packaging: bale of 25 kg


Gel-Type P (g/cm3) d60 (nm) Ospec (m2/g) TG (°C) OH-cont.

(mg KOH/g)

Nanoprene® B P600H VP* SBR 1.06 47.4 126 60 20,5

Nanoprene® B P400H VP* SBR 1.04 40.3 146 37,5 34,6

Nanoprene® B PM00OH VP* SBR 1.02 50 125 -2,5 25,1

Nanoprene® B M10OH VP* SBR 1.02 50 125 -9 27,3

Nanoprene® B M15OH VP* SBR 1.0 45.5 132 -14,5 25,2

Nanoprene® B M75OH VP* BR 0.94 50.9 127 -77 32,8


Acrylonitrile

content (base

polymer) (%)

Mooney

viscosity (1) ML

1+4/100°C (MU)

Density

(g/cm3)

Average

particle

size (mm)

Partitioning

agent

Standard

packaging

Remarks

Non pre-crosslinked grades

Baymod® N 34.52 33.0 45 0.98 0.70calcium

stearate

25 kg boxes (polyeth-

ylene-lined) on pallets,

contents: 750 kgBaymod® N 34.82 33.0 70 0.98 0.70

Baymod® N 33114 33 .0 110 0.98 0.60 Silica 25 Kg boxes (polyeth-


contents 750 Kg

Pre-crosslinked grades

Baymod® N XL 32.12 31.5 47.5 1.01 0.40 Silica

25 kg boxes (polyeth-


contents: 750 kg;

Baymod® N

XL 3364 VP*

33.0 55 1.00 0.40 Silica

Baymod® N XL 32.32 31.5 47.5 1.01 0.40 PVC

Baymod® N

XL 33.61 VP*

33.0 55 1.00 0.40 PVC

Baymod® N XL 38.43 34.0 115 (2) 1.04 0.12 calcium

carbonate

brake and

clutch pads


NANO ADDITIVE BASED ONBUTADIENE STYRENE ANDACRYLATES

POWDERED ACRYLONITRILE-BUTADIENE RUBBER

(1) unmassed, ISO 289

(2) massed


Polymer soluble

in methyl-ethy-

glycole, application

in organic

solvents possible,

for gaskets

thermoplastic

modification,

especially for PVC


CONTACT DATA

TECHNICAL

EUROPE

LANXESS Deutschland GmbH

HPE

Leverkusen, Germany

[email protected]

+49 214 30 46396

NORTH AMERICA

LANXESS Corp.

HPE

Pittsburgh PA, USA

[email protected]

+ 1 269 429 0581

SOUTH AMERICA

LANXESS Indústria de Produtos Quimicos e Plásticos LTDA.

HPE

Sao Paulo, Brazil

[email protected]

+55 11 3741-7928

APAC

LANXESS Pte. Ltd.

HPE

Singapore

[email protected]

+65 6725 5888

GREATER CHINA

LANXESS

Chemical (China) Co., Ltd.

HPE

Qingdao, P. R. China

[email protected]

+86 532 8082 2027

AMEC


HPE

Leverkusen, Germany

[email protected]

+49 214 30 46396

Sales offices worldwide:www.sales-offices-hpe.lanxess.com

www.krynac.comwww.perbunan.comwww.baymod-n.comwww.hpe.lanxess.com

Sources:

Page 8: Kloeckner DESMA Elastomertechnik, Fridingen, Germany

Page 10: Trelleborg Sealing Solutions, Jönköping, Sweden

Page 12: SCHNEEGANS GmbH, Emmerich am Rhein, Germany

Page 13: Machine Works Rieter Ltd., Winterthus, Switzerland

Page 13: Forbo Siegling GmbH, Hannover, Germany

Page 16: Frenzelit-Werke GmbH & Co.KG, Bad Berneck, Germany

Page 17: R. Klinger Dichtungstechnik GmbH & Co. KG, Gumpoldskirchen,

Austria

Page 18: Trelleborg Rubore AB, Kalmar, Sweden

Page 21: nora systems GmbH, Weinheim, Germany

Page 26: August Herzog Maschinenfabrik GmbH & Co. KG, Oldenburg,

Germany

* Trial product

(VP = Versuchsprodukt = trial product). The information contained herein is

merely preliminary data. Testing as to properties and applications is not final.

Further information, including data which could change or add hazards with

use, may be developed. Such information may be needed to properly evalua-

te or use this product. Use is undertaken at the sole risk of the user.

COMMERCIAL

LANXESS Emulsion Rubber

HPE

La Wantzenau, France

[email protected]

+49 214 30 32634

LANXESS Corp.

HPE

Pittsburgh PA, USA

[email protected]

+ 1 412 809 4764

[email protected]

+55 11 3046-3353

LANXESS Pte. Ltd.

HPE

Singapore

[email protected]

+65 6725 5893

LANXESS

Chemical (China) Co., Ltd.

Technical Rubber Products

Shanghai, P. R. China

[email protected]

+86 513 8905 9123


HPE

Leverkusen, Germany

sebastiaan.van-gemert

@lanxess.com

+49 214 30 56671

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QUALITY AND SAFETY

Quality & Environmental Management

Krynac®, Perbunan®, Baymod® N are produced under strict control regarding

safety, environmental protection and quality. The whole supply chain, from

production to customer service, is covered by ISO 9001 and ISO 14001

certification.

Product safety

Relevant safety data and references as well as the necessary hazard warning

labels can be found in the Material Safety Data Sheet.

Food contact

Information concerning FDA and BfR compliance can be obtained on

request from the Health, Safety, Environment and Quality Department

(HSEQ) of Lanxess.

As with any product, use of the products mentioned in this publication in a

given application must be tested (including field testing, etc.) by the user in

advance to determine suitability.

Health and Safety Information:

Appropriate literature has been assembled which provides information

concerning the health and safety precautions that must be observed when

handling the LANXESS products mentioned in this publication. For materials

mentioned which are not LANXESS products, appropriate industrial

hygiene and other safety precautions recommended by their manufacturers

should be followed. Before working with any of these products, you must

read and become familiar with the available information on their hazards,

proper use and handling. This cannot be overemphasized. Information

is available in several forms, e.g., material safety data sheets and product

labels. Consult your LANXESS representative in Germany or contact the

Health, Safety, Environment and Quality Department (HSEQ) of LANXESS

Germany or - for business in the USA - the LANXESS Product Safety and

Regulatory Affairs Department in Pittsburgh, PA.

Regulatory Compliance Information: Some of the end uses of the products

described in this publication must comply with applicable regulations, such

as the FDA, BfR, NSF, USDA, and CPSC. If you have any questions on the

regulatory status of these products, contact your LANXESS Corporation

representative, the LANXESS Regulatory Affairs Manager in Pittsburgh,

PA or the Health, Safety, Environment and Quality Department (HSEQ) of

LANXESS Germany.

The manner in which you use and the purpose to which you put and utilize

our products, technical assistance and information (whether verbal, written

or by way of production evaluations), including any suggested formulations

and recommendations, are beyond our control. Therefore, it is imperative that

you test our products, technical assistance and information to determine to

your own satisfaction whether they are suitable for your intended uses and

applications. This application-specific analysis must at least include testing

to determine suitability from a technical as well as health, safety, and

environmental standpoint. Such testing has not necessarily been done by us.

Unless we otherwise agree in writing, all products are sold strictly pursuant

to the terms of our standard conditions of sale. All information and technical

assistance is given without warranty or guarantee and is subject to change

without notice. It is expressly understood and agreed that you assume and

hereby expressly release us from all liability, in tort, contract or otherwise,

incurred in connection with the use of our products, technical

assistance, and information.

Any statement or recommendation not contained herein is unauthorized and

shall not bind us. Nothing herein shall be construed as a recommendation

to use any product in conflict with patents covering any material or its use.

No license is implied or in fact granted under the claims of any patent.

Forward-looking statements

This product information contains forward-looking statements based on

current assumptions and forecasts made by the LANXESS AG management.

Various known and unknown risks, uncertainties and other factors could lead

to material differences between the actual future consolidated results, finan-

cial situation, development or performance of the company, and the estimates

given here. The company assumes no liability to update such forward-looking

statements or to adapt to future events or development.

Krynac® and Perbunan® are registered trademarks of LANXESS Deutschland

GmbH. Baymod® is a registered trademark of Bayer AG, Germany.

© 2013, LANXESS Deutschland GmbH. All rights reserved.


NBR ENERGIZED BY

Our state-of-the-art polimerization enables state-of-the-art solutions for our customers. Krynac® Perbunan® and Baymod® N – quality-brands for definitely convincing results.

Order no: LXS-HPE 002, Edition: 2013-01, Printed in Germanywww.lanxess.com

OIL RESISTANCE ENERGIZED BY - Lanxess · Page 1 of 32: This document contains important information and must be read in its entirety. 1 OIL RESISTANCE ENERGIZED BY …

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