2 августа, 2015 
Malyar by Ian Royston BSc and Roy Usher BSc
Thermoplastic acrylic polymers are used in the decoration and protection of masonry and concrete, for both interior and exterior applications.
Due to the highly alkaline nature of most masonry materials, one of the fundamental properties required for high performance long-life coatings on such a substrate is resistance to saponification. Unlike alkyds (polyesters), acrylic polymers have a carbon-carbon backbone which is much less vulnerable to chemical attack. Whilst isomerised rubber and chlorinated rubber coatings are stable when applied over alkaline substrates, thermoplastic acrylics offer better light-fastness for exterior use and also confer:
• Excellent adhesion — when thinned they can even bind previously painted and chalky surfaces. [7]
• Good application properties under adverse conditions such as temperature extremes and damp conditions. In this regard solution acrylic polymers are superior to water based systems.
Acrylic based polymers used in masonry paints can be broken down into two general classes:
Опубликовано в рубрике 