Process for preparing acid dyeable acrylonitrile polymer...

Details Process for preparing acid dyeable acrylonitrile polymer... Process for preparing acid dyeable acrylonitrile polymer...

C - Chemistry, Metallurgy

08

F

402/407, 402/484

C08F 6/16 (2006.01) C08F 220/48 (2006.01)

Patent

CA 1227600

TITLE PROCESS FOR PREPARING ACID DYEABLE ACRYLONITRILE POLYMER HAVING IMPROVED WHITENESS ABSTRACT OF THE DISCLOSURE Acrylonitrile copolymers containing basic comonomers have improved color and color stability when the polymerization is carried out using a catalyst selected from the group consisting of hydrogen peroxide, alkyl and aryl hydroperoxides, acetyl and triacetone peroxides and alkali metal perborates and percarbonates along with an activator selected from the group consisting of 1-thioglycerol, 1-thiosorbitol and thioglycol and the polymerization mixture is quenched with a metal sequestering agent and a compound selected from the group consisting of SO2, sodium bisulfite and sodium metabisulfite.

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