High impact styrene/acrylonitrile polymer blend compositions
First Claim
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1. A thermoplastic polymer composition comprising a mixture of:
- a) a halogenated elastomeric random copolymer having a saturated or low unsaturation backbone polymer segment and containing aromatic monomer units of the following structure distributed along the polymer backbone chain;
##STR3## wherein R and R'"'"' are independently selected from the group consisting of hydrogen and C1 to C4 alkyl, a X is bromine or chlorine, n is 1-3 and wherein the halogen content of the copolymer is 7 mole % or less and the halogen content of the backbone polymer is 2 mole % or less.b) a copolymer of styrene and acrylonitrile; and
c) from about 0.5 to about 10 parts by weight per 100 parts by weight of the polymer content of the mixture of a compound selected from the group consisting of one or a mixture of;
aluminum compounds of a halide or a carboxylic acid selected from the group consisting of benzoic, naphthenic, alicyclic and C10 to C28 fatty acids,iron compounds of a halide or a carboxylic acid selected from the group consisting of benzoic, naphthenic, alicyclic and C10 to C28 fatty acids,tin compounds of a halide or a carboxylic acid selected from the group consisting of benzoic, naphthenic, alicyclic and C10 to C28 fatty acids, andzinc compounds of a halide or a carboxylic acid selected from the group consisting of benzoic, naphthenic, alicyclic and C10 to C28 fatty acids, said elastomeric random copolymer present in said composition at a weight ratio of from about 5 to about 80 parts by weight per 100 parts by weight of said styrene/acrylonitrile copolymer.
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Abstract
Styrene/acrylonitrile (SAN) resin compositions are provided having both improved room temperature impact properties as well as good weatherability. The compositions comprise a mixture of SAN resin, an elastomeric halogenated copolymer comprising a C2 to C12 monoolefin, e.g. isobutylene, and a ring-substituted alklstyrene, e.g., para-methylstyrene, and a compatibilizing agent such as zinc stearate.
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Citations
12 Claims
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1. A thermoplastic polymer composition comprising a mixture of:
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a) a halogenated elastomeric random copolymer having a saturated or low unsaturation backbone polymer segment and containing aromatic monomer units of the following structure distributed along the polymer backbone chain;
##STR3## wherein R and R'"'"' are independently selected from the group consisting of hydrogen and C1 to C4 alkyl, a X is bromine or chlorine, n is 1-3 and wherein the halogen content of the copolymer is 7 mole % or less and the halogen content of the backbone polymer is 2 mole % or less.b) a copolymer of styrene and acrylonitrile; and c) from about 0.5 to about 10 parts by weight per 100 parts by weight of the polymer content of the mixture of a compound selected from the group consisting of one or a mixture of; aluminum compounds of a halide or a carboxylic acid selected from the group consisting of benzoic, naphthenic, alicyclic and C10 to C28 fatty acids, iron compounds of a halide or a carboxylic acid selected from the group consisting of benzoic, naphthenic, alicyclic and C10 to C28 fatty acids, tin compounds of a halide or a carboxylic acid selected from the group consisting of benzoic, naphthenic, alicyclic and C10 to C28 fatty acids, and zinc compounds of a halide or a carboxylic acid selected from the group consisting of benzoic, naphthenic, alicyclic and C10 to C28 fatty acids, said elastomeric random copolymer present in said composition at a weight ratio of from about 5 to about 80 parts by weight per 100 parts by weight of said styrene/acrylonitrile copolymer. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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Specification