Polymer scale preventive agent

Details Polymer scale preventive agent Polymer scale preventive agent

C - Chemistry, Metallurgy

09

K

C09K 3/00 (2006.01) C08F 2/00 (2006.01) C08G 73/02 (2006.01)

Patent

CA 2112535

ABSTRACT OF DISCLOSURE Polymer scale Preventive agent A polymer scale preventive agent for use in polymerization of a monomer having an ethylenically unsaturated double bond, comprising an alkaline solution containing (A) a condensation product of (A-1) a diamino aromatic compound having the general formula (1): Image (1) wherein R1 is at least one group selected from the group consisting of -OH, -COOH and -SO3H, R2 is a hydrogen atom or a substituent group, X is a single bond or a divalent group of the formula -CH=CH-, and m and n are each an in- teger from 0 to 4, provided m and n are not simultaneously zero, when a plurality of R1 groups are present they may be identical or different, and when a plurality of R2 groups are present they may be identical or different, with (A-2) a quinone compound, and a process for producing a polymer using the agent are disclosed. Polymer scale deposition can be prevented not only on the areas located in the liquid phase region but also on the areas around the interface between gas and liquid phases in a polymerization vessel, and a polymeric product can be ob- tained which has a reduced number of fish eyes when pro- cessed into formed products.

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