![]() For example, free radical initiators from polymerization of styrene-acrylic copolymers may influence the degree of yellowing in the final product.ĭespite these drawbacks, styrene acrylic polymers are still widely used in construction products, such as ceramic tile adhesives, fillers, putties and elastomeric roof coatings. In fact, as styrene content increases, yellowing increases, though other factors can also have an effect. One drawback of styrene-acrylic polymers is the tendency to yellowing from direct sunlight exposure. Good adhesion to common substrates, including galvanized steel, aluminum and wood.Ideal gloss, film strength, and resistance to removal by detergents.Good weatherability and good stain resistance.Other properties of styrene-acrylic emulsion polymers include: As a result, they tend to be durable and exhibit good abrasion resistance and good mechanical properties. This results in polymers that are ideal for certain applications, such as primers for the construction industry or binders for paper coatings.Īnother important property of styrene-acrylic polymers is their high glass transition temperature. Also, styrene itself is a hydrophobic monomer, making it possible to produce styrene-acrylic polymers with low particle sizes. Styrene-acrylic polymers offer excellent hydrophobic characteristics, which means they have superior water resistance and moisture vapor transmission rate (MVTR) when compared to all-acrylic polymers. That makes styrene-acrylic polymers cost-effective alternatives to pure acrylics. The price of styrene is lower than chemicals found in the acrylate family. In addition to versatility, cost is another significant advantage. Styrene-acrylic polymer emulsions are ubiquitous in every market where water-based systems are used because of the array of specific properties that can be achieved. The versatility of this class of polymers owes much to the wide-ranging family of acrylic monomers, which, when combined with styrene, can build random copolymers with specific Tg. All of these acrylic monomers are highly reactive chemicals, which means they readily combine with themselves or other monomers to form commercially important polymers.One of the most important polymer reactions, occurring via emulsion polymerization, involves acrylic-based monomers combining with styrene to form a styrene-acrylic emulsion polymer. Known as acrylates, this group includes acrylic acid and its esters - methyl acrylate, butyl acrylate, ethyl acrylate, and 2-ethylhexyl acrylate. Styrene-acrylic emulsion polymers are based on a group of chemicals that are true workhorses in the field of polymer chemistry. ![]()
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