초록 ▼

Latex adhesives having a Tg of -60°to 0°C. characterized by superior rheological properties, are prepared without the use of additional thickeners from a colloid stabilized latex comprising: 65-90% by weight of the latex polymer solids of an acrylate or methacrylate ester monomer polymerized in 10-3

Latex adhesives having a Tg of -60°to 0°C. characterized by superior rheological properties, are prepared without the use of additional thickeners from a colloid stabilized latex comprising: 65-90% by weight of the latex polymer solids of an acrylate or methacrylate ester monomer polymerized in 10-35% by weight of the latex solids of a polymeric colloid, the polymeric colloid having a Tg of -40°to 0°C., a number average molecular weight of 2,000 to 10,000 and comprising (a) 50 to 85% by weight of a monomer of the formula: [Figure] 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 another ethylenically unsaturated copolymerizable monomer.

대표청구항 ▼

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: [Figure] where R′is hydrogen or methyl and R″is a C1-C12 straight or branched chain alkyl group; (b) 10 to 50

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: [Figure] 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).