Colloid stabilized latex adhesives

  • US 4,721,748 A
  • Filed: 11/17/1986
  • Issued: 01/26/1988
  • Est. Priority Date: 08/05/1985
  • Status: Expired due to Term
First Claim
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1. A process for the preparation of latex adhesive composition having a Tg of -60°

  • to 0°

    C. comprising the steps of;

    (i) solution polymerizing(a) 50 to 85% by weight of a monomer of the formula;

    ##STR4## where R'"'"' is hydrogen or methyl and R" is a C1 -C12 straight or branched chain alkyl group;

    (b) 10 to 50% by weight of an ethylenically unsaturated mono- or dicarboxylic acid;

    (c) 5 to 30% by weight of an acrylic or methacrylic ester of a polyalkylene oxide; and

    (d) 0 to 30% by weight of an ethylenically unsaturated copolymerizable monomer selected from the group consisting of hydroxyalkyl acrylates or methacrylates;

    acrylamide, methacrylamide and their N-substituted derivatives;

    with the proviso that components a-d total 100% by weight;

    to form an alkali soluble polymer having a Tg of -40°

    to 0°

    C. and a number average molecular weight of 2,000 to 10,000;

    (ii) neutralizing the solution polymer of (i) with a fugitive alkali to give a water-soluble polymer salt; and

    (iii) polymerizing an acrylate or methacrylate monomer or mixture thereof in an aqueous medium in the presence of a free radical catalyst and 10 to 35% by weight of the solids of the total latex of the polymeric colloid of (ii).

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