Emulsion polymerisation process

Details Emulsion polymerisation process Emulsion polymerisation process

C - Chemistry, Metallurgy

08

F

400/3064, 400/90

C08F 2/22 (2006.01) C08F 4/40 (2006.01) C08F 6/00 (2006.01) C08L 25/04 (2006.01) C08L 55/02 (2006.01)

Patent

CA 1111161

A B S T R A C T A process for reducing the residual monomer level of a polymer latex prepared by emulsion polymerisation comprises exposing the latex in a separate vessel from that in which the main polymerisation has been carried out to conditions under which free radicals are produced by a secondary catalyst added to the latex, the said catalyst being oil soluble or having an oil soluble component. In a preferred embodiment a polymer latex prepared by the emulsion polymerisation of styrene alone or a mixture containing styrene having a residual styrene level not exceeding 0.1% based on latex volume may be obtained.

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