US4686257A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polypropylene resin composition containing filler
Assignee: Sumitomo Chemical Co Ltd
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Filing: 1986-07-25
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Granted: 1987-08-11
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Expires: 2006-07-25
Abstract
Abstract A filler-containing polypropylene resin composition is disclosed, comprising (a) from 30 to 90% by weight of a polypropylene resin, (b) from 2.5 to 38% by weight of an ethylene copolymer composed of from 82 to 98.7 mol % of ethylene, from 1 to 15 mol % of an ester selected from alkyl acrylate and alkyl methacrylates having from 1 to 8 carbon atoms in the alkyl moiety thereof and from 0.3 to 3 mol % of an unsaturated dicarboxylic acid anhydride, and (c) from 5 to 50% by weight of a filler. Molded products obtained from the composition have improved finishing properties, such as adhesion, coating properties, printability, and the like.
Inventors
- 👤 Tatsuyuki Mitsuno
- 👤 Teruhisa Koyama
- 👤 Hideo Shinonaga
- 👤 Akio Daimon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 05:24
CPC Classifications
C; C08; C08K; C08K3/00; C08K3/34; C08K9/00; C08K9/08; C08L; C08L23/00; C08L23/02; C08L23/04; C08L23/08; C08L23/10; C08L33/00; C08L33/04; C08L35/00; C08L23/0846; C08L23/0869
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
87 words
A filler-containing polypropylene resin composition comprising (a) from 30 to 90% by weight of a polypropylene resin, (b) from 2.5 to 38% by weight of an ethylene copolymer composed of from 82 to 98.7 mol% of ethylene, from 1 to 15 mol% of an ester selected from alkyl acrylates and alkyl methacrylates having from 1 to 8 carbon atoms in the alkyl moiety thereof and from 0.3 to 3 mol% of an unsaturated dicarboxylic acid anhydride, and (c) from 5 to 50% by weight of a filler.
Claim 2
Dependent Claim
87 words
A filler-containing polypropylene resin composition comprising (a) from 30 to 90% by weight of a polypropylene resin, (b) from 2.5 to 38% by weight of an ethylene copolymer composed of from 82 to 98.7 mol% of ethylene, from 1 to 15 mol% of an ester selected from alkyl acrylates and alkyl methacrylates having from 1 to 8 carbon atoms in the alkyl moiety thereof and from 0.3 to 3 mol% of an unsaturated dicarboxylic acid anhydride, and (c) from 5 to 50% by weight of a filler.
Claim 3
Dependent Claim
29 words
A filler-containing polypropylene resin composition as in claim 1, wherein said ester is present in an amount of from 3 to 12 mol% based on the ethylene copolymer (b).
Claim 4
Dependent Claim
18 words
A filler-containing polypropylene resin composition as in claim 1, wherein said unsaturated dicarboxylic acid anhydride is maleic anhydride.
Claim 5
Dependent Claim
32 words
A filler-containing polypropylene resin composition as in claim 1, wherein said unsaturated dicarboxylic acid anhydride is present in an amount of from 0.5 to 2.8 mol% based on the ethylene copolymer (b).
Claim 6
Dependent Claim
23 words
A filler-containing polypropylene resin composition as in claim 1, wherein said ethylene copolymer (b) has a melt index of from 0.5 to 300.
Claim 7
Dependent Claim
30 words
A filler-containing polypropylene resin composition as in claim 1, wherein said ethylene copolymer (b) is present in an amount of from 5 to 30% by weight based on the composition.
Claim 8
Dependent Claim
17 words
A filler-containing polypropylene resin composition as in claim 1, wherein said filler (c) is talc and/or mica.
Claim 9
Dependent Claim
29 words
A filler-containing polypropylene resin composition as in claim 1, wherein said filler (c) is present in an amount of from 10 to 40% by weight based on the composition.
References Cited (Backward Citations)
BE759929A
Cited
US3849517A
Cited
JPS5076149A
Cited
JPS56109213A
Cited
JPS56127653A
Cited
US4409286A
Cited
JPS58211303A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1990-08-10 | 1991-02-09 | 1991-08-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-08-10 | 1995-02-09 | 1995-08-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-08-10 | 1999-02-09 | 1999-08-11 | $7700.00 | Window Closed / Lapsed |