Japanese Patent JPS6260405

B2

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 unsaturated comonomers in the presence of a free-radial initiator and at least one member of the group consisting of emulsifier and a protective colloid and optionally present conventional adjuvants, the ethylenically unsaturataed comonomers being (b1) 79.5 to 99.5% by weight of vinyl chloride, (b2) 0 to 15% 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 or 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 DEG to 120 DEG 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.

PEETAA BARU
KURAUSU MARUKUARUTO
MANFUREETO ZERIHI

JP6603084A

December 16, 1987

April 04, 1984

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WACKER CHEMIE GMBH

C08F214/00; C08F2/00; C08F2/22; C08F2/24; C08F10/00; C08F210/02; C08F214/06; C08F291/00; C09D127/04; C09J127/04; D21H19/14

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