METHOD OF PREPARING AQUEOUS DISPERSIVE ADHESIVE Russian patent published in 1999 - IPC

FIELD: gluing of products from paper, wood, polymeric films, natural and artificial leather and linoleum. SUBSTANCE: one-stage preparation of aqueous dispersive copolymers is carried out by water-emulsion copolymerization of butadiene-1,3, styrene, methyl methacrylate and methacrylic acid in the presence of aliphatic mercaptans or diisopropylxanthogen disulfide as molecular weight regulator at weight ratio of butadiene-1,3, styrene, methyl methacrylate, methacrylic acid and molecular weight regulator of (50-65): (20-35):(10-25):(0.1- 0.3):(0.1-0.35), respectively in reaction mixture. Aqueous dispersions of copolymers include latex of carboxyl-containing butadiene-styrene-methyl methacrylate copolymer. Latex is further concentrated and thickener is added till latex concentration reaches 40-45 wt % per dry matter at viscosity of 30-40 seconds. EFFECT: multipurpose, non-toxic, fireproof aqueous dispersive polymeric adhesive intended for gluing products from paper, wood, polymeric films, leather and linoleum. 1 tbl