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Process for preparing protective-colloid-stabilized vinyl ester or vinyl ester-ethylene polymers in the form of their aqueous dispersions
Process for preparing protective-colloid-stabilized vinyl ester or vinyl ester-ethylene polymers in the form of their aqueous dispersions
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机译:以水分散体形式制备保护胶体稳定的乙烯基酯或乙烯基酯-乙烯聚合物的方法
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摘要
The invention relates to a process for preparing protective-colloid-stabilized vinyl ester or vinyl ester-ethylene polymers in the form of their aqueous dispersions by emulsion polymerization in the presence of one or more protective colloids, which comprises carrying out the polymerization in the presence of a hydrophobic but silane-free protective colloid based on (meth)acrylate polymers with from 80 to 95% by weight, based on the total weight of the copolymer, of acrylic or methacrylic esters of aliphatic alcohols having from 1 to 12 carbon atoms, and from 5 to 20% by weight, based on the total weight of the copolymer, of ethylenically unsaturated mono- or dicarboxylic acids, and with a glass transition temperature Tg of the copolymer of from 60 to 120 C., and with a Fikentscher K value of the copolymer of from 20 to 50.
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