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CONTACT ADHESIVE DISPERSION CONTAINING POLYMERS WHICH ARE PRODUCED BY STAGE POLYMERIZATION AND CONTAIN UREIDO GROUPS OR UREIDO-ANALOG GROUPS
CONTACT ADHESIVE DISPERSION CONTAINING POLYMERS WHICH ARE PRODUCED BY STAGE POLYMERIZATION AND CONTAIN UREIDO GROUPS OR UREIDO-ANALOG GROUPS
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机译:由阶段聚合产生的含接触性分散胶的聚合物,并包含脲醛基或脲醛类似物基团
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摘要
A description is given of a pressure-sensitive adhesive dispersion comprising a water-dispersed polymer P1 formed by emulsion polymerization. The polymer P1 is formed from a monomer mixture comprising (a) at least 40% by weight of C4 to C20 alkyl (meth)acrylates which when polymerized as homopolymers have a glass transition temperature of 30° C. or less, (b) at least 0.05% by weight of (meth)acrylate monomers having a substituent of the formula where X is CH2, O, NH or NR and R is a C1 to C4 alkyl group, (c) at least 0.1% by weight of acid monomers. The polymer P1 is prepared by polymerization in at least 2 stages, the glass transition temperature of a polymer from monomers of the first stage being lower by at least 20° C. than the glass transition temperature of a polymer from monomers of a later, second stage.
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