Polymer dispersions and their use in pigmented coating compositions
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United States of America Patent
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Jun 13, 2017
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Sep 3, 2015
app pub date -
Dec 16, 2011
filing date -
Dec 16, 2011
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Abstract
A copolymer dispersion is described comprising a copolymer derived from a monomer mixture comprising: (a) 88.5 to 94% by weight of at least one vinyl ester of a saturated carboxylic acid; (b) 5 to 10.5% by weight of ethylene; (c) 0.5 to 5% by weight of at least one ethylenically unsaturated acid and/or an anhydride thereof and/or a salt thereof; and (d) 0.5 to 5% by weight of at least one ethylenically unsaturated monomer having at least one crosslinkable functional unit. The weight ratio of vinylester units to ethylene units in the copolymer is between 89:11 and 94:6 and the dispersion is stabilized with at least 1% by weight of an emulsifier, wherein the amounts of monomers and emulsifier refer to the total amount of monomers in the copolymer.
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