Compatible polystyrene blends
AssigneeBorg-Warner Corporation
InventorsKing-Han Tan, Jan L. de Greef
Life of this patent
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Abstract
A blend of polystyrene, a block copolymer of styrene and certain conjugated diolefins, and a graft copolymer of styrene, acrylonitrile, and butadiene. Methyl methacrylate may be substituted for all or a portion of the acrylonitrile. The blend retains the good qualities of the individual polymers and is characterized by a stable compatibility.
Claims7
A blend of polymers consisting essentially (1) from about 30 to about 80 parts of a block copolymer of styrene and a conjugated diolefin of 4-6 carbon atoms, (2) from about 10 to about 40 parts of a graft copolymer wherein a copolymer of styrene and up to 40 parts, based on the weight of a graft copolymer, of acrylonitrile and/or methyl methacrylate is grafted onto a rubbery substrate which is polybutadiene or a copolymer of butadiene and styrene, and (3) from about 10 to about 40 parts of polystyrene.
Dependencies are inferred from the claim text.