Patent ID: 9062133
Filing Date: 2015-06-23
Classification: C08C,C08F

Abstract:
1. A process for forming a brominated butadiene polymer comprising reacting a butadiene polymer containing aliphatic carbon-carbon double bonds with a quaternary ammonium tribromide or a quaternary phosphonium tribromide, in the presence of a solvent mixture containing at least one polyhalogenated compound selected from dichloromethane, dibromomethane, bromochloromethane, 1,2-dichloroethane, 1,1-dichloroethane, 1,2-dibromoethane 1,1-dibromoethane, or a mixture of two or more thereof, and at least one monohalogenated alkane, wherein the ratio of the polyhalogenated compound and the monohalogenated alkane is from about 3:1 to about 1:3 by weight, to form a solution of the brominated butadiene polymer in the solvent mixture and a quaternary ammonium monobromide salt or quaternary phosphonium monobromide salt as a by-product.