C - Chemistry – Metallurgy – 08 – F
Patent
C - Chemistry, Metallurgy
08
F
400/1301, 400/30
C08F 291/00 (2006.01) C08F 210/02 (2006.01) C08F 214/06 (2006.01) C09J 3/14 (1985.01)
Patent
CA 1247778
ABSTRACT OF THE DISCLOSURE A process for the preparation of finely-divided aqueous copolymer dispersions with a solids content of 10 to 70% by weight, based on the dispersion, comprising emulsion polymerizing (a) 1 to 50% by weight of ethylene and (b) 99 to 50% by weight of at least two ethylenically saturated comonomers in the presence of a free-radical initiators and at least one member of the group consisting of emulsifier and a protective colloid and optionally present conventional adjuvants, the ethylenically unsaturated comonomers being b1) 60 to 99.5% by weight of vinyl chloride, b2) 0 to 39.5% by weight of ethylenically unsaturated oil-soluble monomers, b3) 0.5 to 10% by weight of ethylenically unsaturated, functional, water-soluble monomers and b4) 0 to 5% by weight of oil-soluble monomers monoethylenically unsaturated and containing functional groups of polyethylenically unsaturated and mixtures thereof with the proviso that the monomers of b2) and b4) are copolymerizable with a) and b1), the comonomers being initially present in 1 to 40% by weight and the content of the water-soluble monomers being 1 to 35% by weight of the comonomers phase initially present and the rest of component b) being added as an aqueous emulsion during polymerization and the polymerization is effected at 0 to 120°C with an ethylene pressure of 10 to 150 bar which is built up at the latest by the point in time at which polymerization of the initial material is complete.
451209
Ball Peter
Marquardt Klaus
Selig Manfred
Macrae & Co.
Wacker-Chemie Gmbh
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