Vinyl chloride resin composition containing a graft...

Details Vinyl chloride resin composition containing a graft... Vinyl chloride resin composition containing a graft...

C - Chemistry, Metallurgy

08

L

400/3056

C08L 27/06 (2006.01) C08L 51/04 (2006.01)

Patent

CA 1171195

ABSTRACT OF THE DISCLOSURE A latex of a highly crosslinked butadiene rubber polymer comprising not less than 50% of butadiene, 1.0 to 10% of a crosslinking agent and a remainder of an ethylenically unsaturated monomer copolymerizable with butadiene, and having a particle size of 600 to 3,000 .ANG. and a degree of swelling of not greater than 7 is obtain- ed by one or more stages of emulsion polymerization. By polymerizing 15 to 30 parts of a monomer mixture of an alkyl methacrylate, an aromatic vinyl monomer, and optionally a crosslinking agent and an unsaturated nitrile in the presence of 85 to 70 parts of the rubber polymer, a graft copolymer is obtained. A composition comprising 2 to 40% of this graft copolymer and 98 -to 60% of a vinyl chloride resin possesses high impact resistance coupled with improved stress-whitening resistance, which proper- ties cannot be easily obtained at the same time in conventional resin compositions.

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