Claims
- 1. A modified polyolefin resin obtained by melt-kneading a mixture consisting of
- 100 parts by weight of a mixture consisting of (A) 40-99% by weight of a polyolefin resin having a melt flow rate of 0.05-60 g/10 min and (B) 60-1% by weight of a solid rubber having a number-average molecular weight of 10,000-200,000,
- (C) 0.1-5 parts by weight of at least one compound selected from the group consisting of unsaturated carboxylic acids, the derivatives thereof and unsaturated epoxy compounds,
- (D) 0.1-5 parts by weight of an unsaturated aromatic compound and
- (E) 0.01-2 parts by weight of a free-radical initiator,
- the molar ratio of (C)/(D) ranging from 1/0.1 inclusive to 1/1 exclusive.
- 2. A resin according to claim 1, wherein the constituent (C) is maleic anhydride.
- 3. A resin according to claim 1, wherein the constituent (C) is glycidyl acrylate or glycidyl methacrylate.
- 4. A resin according to claim 1, wherein the constituent (D) is styrene.
- 5. A resin according to claim 1, wherein the constituent (A) is a crystalline polypropylene or a crystalline propylene copolymer.
- 6. A resin according to claim 1, wherein the constituent (A) is a crystalline propylene-ethylene block copolymer having a bound ethylene content of 3-15% by weight.
- 7. A modified polypropylene resin according to claim 6, wherein the weight ratio of the constituent (A) to the constituent (B) is 40-95:60-5.
- 8. A molded article of a modified polypropylene resin coated with a urethane coating which is obtained by applying a urethane coating to a molded article of a modified polypropylene resin according to claim 7.
- 9. A modified polypropylene resin according to claim 5, wherein the weight ratio of the constituent (A) to the constituent (B) is 40-75:60-25.
- 10. A molded article of a modified polypropylene resin coated with a urethane coating which is obtained by applying a urethane coating to a molded article of a modified polypropylene resin according to claim 9.
- 11. A resin according to claim 5, wherein propylene homopolymer portion in the crystalline propylene homopolymer or crystalline propylene copolymer has an isotactic pentad of boiling heptane insoluble of not less than 0.970 and a boiling heptane insoluble of not more than 5.0% by weight based on the weight of the propylene homopolymer portion.
- 12. A resin according to claim 6, wherein the propylene-ethylene block copolymer is obtained by gas phase polymerization and contains 20-80% by weight of propylene-ethylene copolymer portion and 80-20% by weight of propylene homopolymer portion.
- 13. A resin according to claim 1, wherein the constituent (B) is an ethylene-alpha-olefin copolymer rubber having a number-average molecular weight of 10,000-100,000.
- 14. A resin according to claim 1 which has a melt flow rate falling in the range of 0.1-100 g/10 min.
Priority Claims (1)
Number |
Date |
Country |
Kind |
62-294750 |
Nov 1987 |
JPX |
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CROSS-REFERENCE TO RELATED APPLICATIONS
This application is a continuation of application Ser. No. 07/487,131, filed Mar. 1, 1990, which in turn is a continuation-in-part of application Ser. No. 07/273,473, filed Nov. 21, 1988, both now abandoned.
US Referenced Citations (7)
Foreign Referenced Citations (2)
Number |
Date |
Country |
2023154 |
Nov 1970 |
DEX |
1939894 |
Feb 1971 |
DEX |
Continuations (1)
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Number |
Date |
Country |
Parent |
487131 |
Mar 1990 |
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Continuation in Parts (1)
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Number |
Date |
Country |
Parent |
273473 |
Nov 1988 |
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