C - Chemistry – Metallurgy – 08 – L
Patent
C - Chemistry, Metallurgy
08
L
400/1101, 400/50
C08L 15/02 (2006.01) C08J 3/00 (2006.01) C08J 3/07 (2006.01) C08L 25/08 (2006.01) C08L 33/08 (2006.01) C08L 33/10 (2006.01) C08L 57/08 (2006.01) C08L 95/00 (2006.01) C09D 195/00 (2006.01)
Patent
CA 2028677
AQUEOUS POLYMER DISPERSIONS AND A PROCESS FOR THEIR PRODUCTION ABSTRACT OF THE DISCLOSURE The present invention relates to an aqueous polymer dispersion containing at most 22% by weight of organic solvents and 30 to 60% by weight of dispersed polymers, characterized in that the dispersed polymers contain A) 20 to 80% by weight of chlorinated, natural or synthetic polymers having a chlorine content of 60 to 70% by weight and B) 20 to 80% by weight of non-chlorinated polymers. The present invention also relates to a process for the production of an aqueous polymer dispersion characterized in that an at least 50% by weight solution in an inert solvent of a chlorinated, natural or synthetic polymer A) having a chlorine content of 60 to 70% by weight is mixed with water in the presence of external emulsifiers to form a water-in-oil emulsion and subsequently the water-in-oil emulsion is combined with an aqueous dispersion of at least one non-chlorinated polymer to form an oil-in-water dispersion, wherein the type of and quantitative ratios between the individual components are selected such that the resulting dispersion has a solvent content of at most 22% by weight, a dispersed polymer content of 30 to 60% by weight and a weight ratio of chlorine-containing polymers A) to non-chlorinated polymers B) of 80:20 to 20:80.
Gruber Hermann
Kubitza Werner
Aktiengesellschaft Bayer
Gruber Hermann
Kubitza Werner
Swabey Ogilvy Renault
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