ASSOCIATIVE POLYURETHANE THICKENERS FOR WATER- BORNE COATINGS Rheological behavior precisely adjusted application! AUTHOR: DR. NICHOLAS BÜTHE, FIRMA: MÜNZING Article from: inside acat 23/2016, page 1 of 6 FOTOS: MÜNZIG CHEMIE GMBH Introduction Paints are used to achieve additional surface functions. The application spectrum ranges from traditional surface protection against aging and corrosion up to special optical or functional properties, such as complex metallic coatings in automotive industry or self- cleaning surfaces. A great deal of work is put into the development of paints to obtain pro- tective, optical or functional properties. How- ever, in the course of development the rheo- logical behaviour of the coating is often ne- glected, although it affects its entire life cycle including manufacturing, storage up to easy application by the end user (figure1). In a more and more competitive environment coating materials must be able to be opti- mally used. The desired layer thickness should be applied in an optimum way in a single work step with simple processing behavior and good levelling. With wall paints often the first impression counts, when stirring. Also a reduced spattering tendency and sufficient sagging must be adjusted in order to stand out from competitive products. Moderate flew of a wall paint when applying with a brush (fig.1)
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AUTHOR: DR. NICHOLAS BÜTHE, FIRMA: MÜNZING Article from: inside acat 23/2016, page 1 of 6 FOTOS: MÜNZIG CHEMIE GMBH
Introduction Paints are used to achieve additional surface
functions. The application spectrum ranges
from traditional surface protection against
aging and corrosion up to special optical or
functional properties, such as complex metallic
coatings in automotive industry or self-
cleaning surfaces. A great deal of work is put
into the development of paints to obtain pro-
tective, optical or functional properties. How-
ever, in the course of development the rheo-
logical behaviour of the coating is often ne-
glected, although it affects its entire life cycle
including manufacturing, storage up to easy
application by the end user (figure1).
In a more and more competitive environment coating materials must be able to be opti-mally used. The desired layer thickness should be applied in an optimum way in a single work step with simple processing behavior and good levelling. With wall paints often the first impression counts, when stirring. Also a reduced spattering tendency and sufficient sagging must be adjusted in order to stand out from competitive products.
Moderate flew of a wall paint when applying with a brush (fig.1)