Process for the polymerisation of vinyl chloride according...

Details Process for the polymerisation of vinyl chloride according... Process for the polymerisation of vinyl chloride according...

C - Chemistry, Metallurgy

08

F

402/304, 402/397

C08F 2/20 (2006.01) C08F 14/06 (2006.01) C08F 22/00 (2006.01)

Patent

CA 1169197

ABSTRACT The subject of the invention is a microsuspension polymerization in water of vinyl chloride, which is carried out in the presence of monomer-soluble radical-initiators and emulsifiers. According to the invention, from about 0.01 to 0.5% by weight, based on the weight of the water, of polymers containing mono-basic or dibasic carboxylic acid units and/or salts thereof are added. Furthermore, in a preferred embodiment, emulsifiers containing perfluor- inated alkyl groups are also used. Stabilization of the microsuspension latex, which is per se sensitive to shear- ing action, and reduction in the amount of emulsifiers used are achieved.

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