US4619969A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polyolefin composition comprising propylene polymer and ethylene/anhydride/ester copolymer
Assignee: Sumitomo Chemical Co Ltd
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Filing: 1985-11-05
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Granted: 1986-10-28
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Expires: 2005-11-05
Abstract
Abstract A polypropylene-based resin composition comprising (A) from 60 to 99 parts by weight of a polypropylene-based resin and (B) from 1 to 40 parts by weight of an ethylene copolymer composed of from 25 to 98.5% by weight of ethylene, from 0.5 to 15% by weight of an unsaturated dicarboxylic acid anhydride and from 1 to 60% by weight of an unsaturated ester compound having from 4 to 12 carbon atoms and/or a modified copolymer obtained by ring opening addition reaction of the acid anhydride group of said ethylene copolymer with an alcohol having from 1 to 20 carbon atoms. The composition provides a molded particle having excellent finishing workability and improved mechanical properties.
Inventors
- 👤 Toshiki Doi
- 👤 Hideo Shinonaga
- 👤 Tadayuki Omae
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 17:47
CPC Classifications
C; C08; C08L; C08L23/00; C08L23/02; C08L23/10; C08F; C08F8/00; C08F8/14; C08L23/12; C08L23/14; C08L23/142; C08L53/00; C08F2810/00; C08F2810/50; C08K; C08K7/00; C08K7/02; C08K7/04; C08K7/14; C08L2205/00; C08L2205/02; C08L23/04; C08L23/08; C08L23/0846; C08L23/0869; C08L51/00; C08L51/06
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
115 words
A polypropylene-based resin composition comprising (A) from 60 to 99 parts by weight of a polypropylene-based resin selected from the group consisting of crystalline polypropylene and crystalline propylene-α-olefin block or random copolymers and (B) from 1 to 40 parts by weight of an ethylene copolymer composed of from 25 to 98.5% by weight of ethylene, from 0.5 to 15% by weight of an unsaturated dicarboxylic acid anhydride and from 1 to 60% by weight of an unsaturated ester compound having from 4 to 12 carbon atoms and/or a modified copolymer obtained by ring opening addition reaction of the acid anhydride group of said ethylene copolymer with an alcohol having from 1 to 20 carbon atoms.
Claim 2
Dependent Claim
115 words
A polypropylene-based resin composition comprising (A) from 60 to 99 parts by weight of a polypropylene-based resin selected from the group consisting of crystalline polypropylene and crystalline propylene-α-olefin block or random copolymers and (B) from 1 to 40 parts by weight of an ethylene copolymer composed of from 25 to 98.5% by weight of ethylene, from 0.5 to 15% by weight of an unsaturated dicarboxylic acid anhydride and from 1 to 60% by weight of an unsaturated ester compound having from 4 to 12 carbon atoms and/or a modified copolymer obtained by ring opening addition reaction of the acid anhydride group of said ethylene copolymer with an alcohol having from 1 to 20 carbon atoms.
Claim 3
Dependent Claim
46 words
A polypropylene-based resin composition as in claim 1, wherein said polypropylene-based resin is present in an amount of from 70 to 95 parts by weight and said ethylene copolymer and/or said modified copolymer is present in an amount of from 5 to 30 parts by weight.
Claim 4
Dependent Claim
47 words
A polypropylene-based resin composition as in claim 1, wherein said ethylene copolymer is composed of from 40 to 94% by weight of ethylene, from 1 to 10% by weight of the unsaturated dicarboxylic acid anhydride and from 5 to 50% by weight of the unsaturated ester compound.
Claim 5
Dependent Claim
17 words
A polypropylene-based resin composition as in claim 1, wherein said unsaturated dicarboxylic acid anhydride is maleic anhydride.
Claim 6
Dependent Claim
28 words
A polypropylene-based resin composition as in claim 1, wherein said alcohol is at least one member selected from the group consisting of trimethylolpropane, 1,4-butanediol, pentaerythritol, 1,6-hexanediol and dipentaerythritol.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1989-10-27 | 1990-04-28 | 1990-10-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-10-27 | 1994-04-28 | 1994-10-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-10-27 | 1998-04-28 | 1998-10-28 | $7700.00 | Window Closed / Lapsed |