Aqueous dispersions

Details Aqueous dispersions Aqueous dispersions

C - Chemistry, Metallurgy

09

J

154/141, 400/551

C09J 175/04 (2006.01) B32B 7/12 (2006.01) C08F 283/00 (2006.01) C08G 18/08 (2006.01) C09D 175/04 (2006.01)

Patent

CA 1341075

A surfactant-free aqueous polymer dispersion containing an anionic water-dispersible polyurethane and a vinyl polymer in a weight ratio of from 10:90 to 90:10, said dispersion having been obtained by: (A) forming a solution of an anionic water-dispersible isocyanale-terminated polyurethane in at least one vinyl monomer; (B) dispersing the solution in an aqueous medium; (C) chain extending the polyurethane, and either (D) adding further vinyl monomer, and (E) initiating polymerisation of the vinyl monomer, or (F) initiating polymerisation of the vinyl monomer, and (G) adding further vinyl monomer during polymerisation.

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