Vamac ® (AEM) Ethylene Acrylate Polymers – New Developments A Response to Trends in the Automotive Industry Manchester Polymer Group Rubber Seminar, May 15th, 2017 Dr. Patricia Panne Technical Service and Development Vamac ® DuPont Performance Materials, Germany
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Vamac (AEM) Ethylene Acrylate Polymers New Developments Patricia Panne Vamac(R) New A… · Heat and Oil Resistance of Elastomers Oil Resistance ( Volume Swell ) No Req. 140 120 100
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Vamac® (AEM) Ethylene Acrylate
Polymers – New Developments
A Response to Trends in the Automotive
Industry
Manchester Polymer Group Rubber Seminar, May 15th, 2017
Dr. Patricia Panne
Technical Service and Development Vamac®
DuPont Performance Materials, Germany
Agenda
Vamac® Background
Automotive Trends
Vamac® Product Line
VMX2122 – Latest Ultra Dipolymer
VMX5000 Series – Latest High Temperature Resistant AEM
2
Agenda
Vamac® Background
Automotive Trends
Vamac® Product Line
VMX2122 – Latest Ultra Dipolymer
VMX5000 Series – Latest High Temperature Resistant AEM
3
Heat and Oil Resistance of Elastomers
Oil Resistance ( Volume Swell )
No Req. 140 120 100 80 60 40 20 10
Heat
Resis
tan
ce
SBR
IR
IIR
EVM EPDM
VMQ
CR NBR
ECO
FVMQ
FFKM
FKM
CSM
CPE
300 275 250 225 200 175 150 125 100 70
EVM High VA
HT-ACM
ACM HNBR
A B C D E F G J K
K J
H
G
F
E
D
C
B
A
Type C
VI %
Class
Vamac® AEM VMX5000
Mid-Performance High-Performance
1 Classification inspired by ASTM D2000 standard 2 Maximum temp. at which a vulcanizate can be aged for 70 hrs and still retain at least 50% of its elongation 3 % volume swell in ASTM IRM 903 Oil, 70 hrs exposure
• NOT recommended: use of diarylamine type AO (e.g., Naugard® 445 or IPPD)
Compounding VMX5000 Series
75A Hose 60A Gasket
VMX5000 181.8 118
AEM 36
DiakTM 1 0.5 - 0.6 0.6 - 1.0
Vulcofac® ACT-55 1 1 - 2
Alcanpoudre® DBU-70
1 - 2
Armeen® 18D 0.5 0 - 0.5
Stearic acid 0 - 0.5 0 - 0.5
ADPA 0.5 - 1.5 0.5 - 1.5
Plasticizer* 2 – 5 0 - 5
Vanfre® Vam 1 1
Carbon Black 2 2
• Polymer: 100phr AEM, Ultra HT,
Ultra IP and GXF suitable dilutents,
fasted cure with Ultra IP
• Curative: ≤0.55phr for best fatigue
resistance; 0.8phr for best
compression set; ≥0.8 phr improved
VW c.s. however heat resistance
affected
• Accelerator: DBU-70 faster cure,
helps processing release
* Alcanplast® PO 80, Tegmer® 812
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Compression Set Resistance: 60 Shore A Gasket
Compression Set as a function of - Time & Temperature
- Surface area / volume ratio
- Filler
VMX5020
black
VMX5020
red
Standard
Ultra LS
VMX5020 100 100
Vamac® Ultra IP 50 50
Vamac® Ultra LS 100
4-ADA antioxidant 1.4 1.4
DPA Antioxidant 2
Stearic Acid 0.5 0.5 1
Phosphoric Acid Ester (Process
Aid) 1 1 1
Monoalkylamine 0.5
FEF N-550 10
MT N 990 15 50
Amino Silane 70% 0.25
Silica VN2 10
Red inorganic pigment 1.5
Plasticizer T810TM 5 5 5
HMDC Curative 1.25 1.25 1.4
DBU (70%) 2 2 2
0
10
20
30
40
50
60
CS ISO815B, 168 h@ 170°C
CS ISO815B, 1008 h@ 170°C
CS O-ring, 168 h @180°C
VMX5000, black
VMX5000 red
Standard Ultra LS
Advantage in heat ageing performance has significant effect on long term compression set
on ISO buttons
Standard fillers lead to significant increase in C.Set between 1 and 6 weeks at 170°C
O-ring has higher surface area / volume ratio compared to ISO button
Growth of the oxidized layer plays more of a role in C.Set for O-rings
Exceptional C.Set for colored compounds possible with novel VMX5000 filler system
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Heat and Oil Ageing: 60 Shore A Gasket
Heat Ageing 3 weeks at 185°C
VMX5020
black
VMX5020
red
Standard
Ultra LS
Hardness (Sh.A, 1s) 62 62 62
Tensile Strength (MPa) 18.0 17.0 16.8
Elongation at Break (%) 300 240 320
Tear Strength (N/mm) 13.7 14.8 15.7
Tg by DSC (°C) -30 -31 -25
• Standard Filled compound too brittle to test
• VMX5000 series still very elastic
-100
-80
-60
-40
-20
0
20
40
Hardness Change(ShA)
Tensile Change(%)
Elongation Change(%)
VMX5000, black
VMX5000 red
Standard Ultra LS
-100
-80
-60
-40
-20
0
20
40
HardnessChange (ShA)
TensileChange (%)
ElongationChange (%)
VolumeChange (%)
VMX5000, black
VMX5000 red
Standard Ultra LS
Ageing in Pentosin® FFL-5 LV, 1008h at 150°C
• Best retention of Elongation (most critical
value for AEM) after fluid ageing for
VMX5000
Original Physical Properties
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Summary VMX5000 Series
• 15-20°C improvement in hot air aging resistance for Acrylic Elastomers
• Fills the gap in heat stability between VMQ/FKM and HT-ACM/AEM
• Hardness range: 55-80 Shore A
• Outstanding CSR and Compression Set Resistance (especially for thin
diameter seals)
• Colored compounds with excellent properties
• Best retention of properties after Oil ageing
• Can be blended with any AEM to achieve lower hardness, lower swell
• Retains the excellent processing of AEM
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The information provided in this data sheet corresponds to DuPont knowledge on the subject at the date of its publication. This information may be
subject to revision as new knowledge and experience becomes available. The data provided fall within the normal range of product properties and
relate only to the specific material designated; these data may not be valid for such material used in combination with any other materials, additives or
pigments or in any process, unless expressly indicated otherwise.
The data provided should not be used to establish specification limits or used alone as the basis of design; they are not intended to substitute for any
testing you may need to conduct to determine for yourself the suitability of a specific material for your particular purposes. Since DuPont cannot
anticipate all variations in actual end-use and disposal conditions, DuPont does not guarantee results, makes no warranties and assumes no liability in
connection with any use of this information. All such information is given and accepted at the buyer’s risk. It is intended for use by persons having
technical skill, at their own discretion and risk. Nothing in this publication is to be considered as a license to operate under or a recommendation to
infringe any patent.
CAUTION: Do not use DuPont materials in medical applications involving implantation in the human body or contact with internal body fluids or tissues
unless the material has been provided from DuPont under a written contract that is consistent with DuPont policy regarding medical applications and
expressly acknowledges the contemplated use. For further information, please contact your DuPont representative. You may also request a copy of
DuPont POLICY Regarding Medical Applications H-50103-5 and DuPont CAUTION Regarding Medical Applications H-50102-5.