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Polymer composition

  • US 20080139737A1
  • Filed: 12/12/2006
  • Published: 06/12/2008
  • Est. Priority Date: 12/13/2005
  • Status: Active Grant
First Claim
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1. A polymer composition comprising polymer particles dispersed in an aqueous medium, wherein the polymer particles comprise, based on the weight of the polymer particles:

  • (a) from 20 to 70 weight % of a first polymer wherein the first polymer has a Tg from −

    30°

    C. to 100°

    C. and comprises as polymerized units, based on the weight of the first polymeri) 15 to 50 weight % of one or more of the following monomers;

    acrylonitrile, methacrylonitrile, vinylbenzonitrile and its isomers, cyanoacrylates, vinyl chloride, vinylidene chloride, alpha-cyano styrene and other multiply cyanated styrenics, andii) 50 to 85 weight % of one or more ethylenically unsaturated comonomers, and(b) 30 to 80 weight % of a second polymer wherein the second polymer has a Tg from −

    10°

    C. to 18°

    C. and comprises as polymerized units, based on the weight of the second polymer;

    i) 70 to 98.5 weight % of one or more ethylenically unsaturated comonomers,ii) 0.5 to 10 weight % of one or more acid functional or anionic monomers, andiii) 1 to 20 weight % of one or more monomers selected from the group consisting of acetoacetoxyethyl(meth)acrylate, acetoacetoxypropyl(meth)acrylate, acetoacetoxybutyl(meth)acrylate, 2,3-di(acetoacetoxy)propyl(meth)acrylate, allyl acetoacetate, and vinyl acetoacetate;

    acetoacetamidoethyl(meth)acrylate, acetoacetamidopropyl(meth)acrylate, acetoacetamidobutyl(meth)acrylate, 2,3-di(acetoacetamido)propyl(meth)acrylate, allyl acetoacetamide, and vinyl acetoacetamide;

    cyanoacetoxyethyl(meth)acrylate, cyanoacetoxypropyl(meth)acrylate, cyanoacetoxybutyl(meth)acrylate, 2,3-di(cyanoacetoxy)propyl(meth)acrylate, allyl cyanoacetate, and vinyl cyanoacetate;

    cyanoacetamidoethyl(meth)acrylate, cyanoacetamidopropyl(meth)acrylate, cyanoacetamidobutyl(meth)acrylate, 2,3-di(cyanoacetamido)propyl(meth)acrylate, allyl cyanoacetamide, and vinyl cyanoacetamide.

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