AQUEOUS DISPERSION OF POLYMER ADDITIVE AND PROCESS FOR PREPARING THE SAME
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United States of America Patent
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Nov 23, 2023
app pub date -
Oct 28, 2020
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Oct 28, 2020
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Abstract
An aqueous dispersion of a polymer additive having a weight average molecular weight of from 2,000 to 25,000 g/mol and comprising, by weight based on the weight of the polymer additive, (i) from 20% to 85% of structural units of an ethylenically unsaturated siloxane monomer; (ii) from 0.1% to 10% of structural units of an ethylenically unsaturated functional monomer carrying at least one functional group selected from an amide, ureido, carboxyl, carboxylic anhydride, hydroxyl, phosphorus acid, or sulfonic acid group, a salt thereof, or mixtures thereof; and (iii) from 5% to 79.9% of structural units of an additional ethylenically unsaturated nonionic monomer. The aqueous dispersion has a coagulum content less than 2,000 ppm after filtration through a 44 micron sieve. A coating composition comprises the aqueous dispersion of the polymer additive can provide coatings with anti-corrosion and/or stain removal properties.
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