Thermoplastic polymer composition
First Claim
1. A thermoplastic polymer composition which comprises:
- (a) a polyester or polyamide thermoplastic polymer; and
(b) a block graft copolymer which comprises (i) as the backbone portion at least one of a block copolymer or a hydrogenated block copolymer consisting of blocks of a vinyl-substituted aromatic compound polymer in a weight range of 5 to 60 weight percent and blocks of a conjugated diene compound polymer in a range of 95 to 40 weight percent, and (ii) as the graft portion, a polymer which in the presence of radicals disintegrates into smaller molecules by the cleavage of molecular chains in preference to rebonding and crosslinking of broken molecules, said block graft copolymer having been chemically modified with molecular units containing a functional group which combines with or interact with said thermoplastic polymer (a), the block copolymer and the radical disintegrative polymer being in a ratio of 20;
1 to 1;
2 by weight.
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Accused Products
Abstract
A thermoplastic polymer composition containing (a) a polyester or polyamide thermoplastic polymer and (b) a block graft copolymer which comprises (i) as the backbone portion at least one of a block copolymer or a hydrogenated block copolymer containing blocks of a styrene-type polymer and blocks of a butadiene-type polymer, and (ii) as the graft portion a radical disintegrative polymer, said block graft copolymer having been chemically modified with molecular units containing a functional group which will combine or interact with said thermoplastic polymer a). The thermoplastic polymer composition is superior in flexibility, resistance to chemicals and oil, impact resistance, moldability and elasticity.
52 Citations
8 Claims
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1. A thermoplastic polymer composition which comprises:
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(a) a polyester or polyamide thermoplastic polymer; and (b) a block graft copolymer which comprises (i) as the backbone portion at least one of a block copolymer or a hydrogenated block copolymer consisting of blocks of a vinyl-substituted aromatic compound polymer in a weight range of 5 to 60 weight percent and blocks of a conjugated diene compound polymer in a range of 95 to 40 weight percent, and (ii) as the graft portion, a polymer which in the presence of radicals disintegrates into smaller molecules by the cleavage of molecular chains in preference to rebonding and crosslinking of broken molecules, said block graft copolymer having been chemically modified with molecular units containing a functional group which combines with or interact with said thermoplastic polymer (a), the block copolymer and the radical disintegrative polymer being in a ratio of 20;
1 to 1;
2 by weight. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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Specification