C - Chemistry – Metallurgy – 08 – F
Patent
C - Chemistry, Metallurgy
08
F
400/1348, 400/40
C08F 214/06 (2006.01) C04B 24/26 (2006.01) C04B 26/04 (2006.01) C08F 210/02 (2006.01) C08J 3/12 (2006.01)
Patent
CA 1261541
ABSTRACT OF THE DISCLOSURE A novel process for the preparation of a readily dispersible, pourable dispersion powder comprising emulsion poly- merizing in the presence of a free radical initiator a mixture of 1 to 50% by weight of ethylene and 99 to 50% by weight of an ethylenically unsaturated comonomer phase comprising at least one member of the group consisting of a) 60 to 100% by weight of vinyl chloride, b) 0 to 40% by weight of monoethylenically unsaturated, oil-soluble monomers, c) 0 to 10% by weight of monoethylenically unsaturated water-soluble monomers having functional groups and d) 0 to 5% by weight of oil-soluble monomers that are monoethylenically unsaturated and have func- tional groups or are multiple ethylenically unsaturated and optionally a protective colloid and/or emulsifier at an ethylene pressure of 10 to 150 bar to obtain an aqueous dispersion of a vinyl chloride-ethylene copolymer, optionally adding to the aqueous dispersion e) 0 to 40% by weight, based on the VCE- polymer, of at least one water-soluble substance having a Tg ? 60°C, f) 0 to 1% by weight, based on the VCE-polymer, of an antifoaming agent, and g) 0 to 30% by weight, based on the total weight of polymer constituents, of a finely divided antiblocking agent and spray drying or freeze drying the aqueous dispersion to obtain the readily redispersible, pourable powder of a vinyl chloride-ethylene copolymer and the powder produced by the said process and improved coatings, paints, glues and adhesives con- taining the said redispersible powder. -A-
467137
Adler Klaus
Ball Peter
Hannebaum Manfred
Killermann Otmar
Marquardt Klaus
Macrae & Co.
Wacker-Chemie Gmbh
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