Claims
- 1. A thermoplastic molding composition having lowered torque requirement entailed in it thermoplastic processing comprising
- (i) a polyester-polyol based-polyurethane resin, and
- (ii) about 0.1 to 5 percent relative to the total weight of said composition of an ionomer comprising a salt of a copolymer of 70 to 99 percent relative to the weight of the copolymer of alpha-olefin and about 1 to 30 percent relative to the weight of the copolymer of alpha, beta-ethylenically unsaturated carboxylic acid, wherein at least some of said carboxylic acid is neutralized by a monovalent counter ion selected from the group consisting of Li.sup.+, Na.sup.+ and K.sup.+,
- said copolymer having a weight average molecular weight of 1,000 to 200,000, said lowered torque requirement being in comparison to a corresponding composition which contains no ionomer.
- 2. The composition of claim 1 wherein said molecular weight is about 20,000 to 80,000.
- 3. The composition of claim 1 wherein said carboxylic acid is (meth)acrylic acid.
- 4. The composition of claim 1 wherein said olefin is ethylene.
- 5. A method of lowering the torque requirement in the thermoplastic processing of a molding composition containing a polyester polyol-based thermoplastic polyurethane resin comprising incorporating in said resin about 0.1 to 5 percent of an ionomer, said percent being relative to the total weight of said composition, said ionomer comprising a salt of a copolymer of 70 to 99 percent relative to the weight of the copolymer of alpha-olefin and about 1 to 30 percent relative to the weight of the copolymer of alpha, beta-ethylenically unsaturated carboxylic acid, wherein at least some of said carboxylic acid is neutralized by a monovalent counter ion selected from the group consisting of Li.sup.+, Na.sup.+ and K.sup.+, said copolymer having a weight average molecular weight of 1,000 to 200,000, said lowering being in comparison to a corresponding composition which contains no ionomer.
- 6. The method of claim 5 wherein said molecular weight is about 20,000 to 80,000.
- 7. The method of claim 5 wherein said carboxylic acid is (meth)acrylic acid.
- 8. The method of claim 5 wherein said olefin is ethylene.
Parent Case Info
This application is a continuation of application Ser. No. 07/879,660 filed May 6, 1992 now abandoned.
US Referenced Citations (11)
Continuations (1)
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Number |
Date |
Country |
Parent |
879660 |
May 1992 |
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