US4717743A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polyolefin-base resin composition
Assignee: Denso Corp
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Filing: 1986-03-27
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Granted: 1988-01-05
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Expires: 2006-03-27
Abstract
Abstract A polyolefin-base resin composition comprising a vegetable fibrous material in fiber form containing cellulose as major constituent and a high flow rate polyolefin-base resin having a melt index of 20 to 100. By using this resin it has become possible to improve the poor processability of a conventional polyolefin-base resin composition incorporated with a vegetable fibrous material in fiber form containing cellulose as major constituent. The invention makes it possible to produce an article of large size and small wall thickness by injection molding while desirable mechanical characteristics being retained.
Inventors
- 👤 Hiroyuki Wakabayashi
- 👤 Fumio Kato
- 👤 Tamotsu Matsubara
- 👤 Yasuo Ishikawa
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 20:44
CPC Classifications
C; C08; C08L; C08L23/00; C08L23/02
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
66 words
A polyolefin-base resin composition comprising: a vegetable fibrous material having a fiber length of more than 0.3 mm, said vegetable fibrous material containing cellulose as a major constituent; and a polyolefin-base resin having a melt index of 20 to 100, said vegetable fibrous material being 20 to 60% by weight of said composition and said polyolefin-base resin being 40 to 80% by weight of the composition.
Claim 2
Dependent Claim
66 words
A polyolefin-base resin composition comprising: a vegetable fibrous material having a fiber length of more than 0.3 mm, said vegetable fibrous material containing cellulose as a major constituent; and a polyolefin-base resin having a melt index of 20 to 100, said vegetable fibrous material being 20 to 60% by weight of said composition and said polyolefin-base resin being 40 to 80% by weight of the composition.
Claim 3
Dependent Claim
39 words
A polyolefin-base resin composition according to claim 1, wherein the polyolefin-base resin contains a polyolefin chemically modified by the introduction of structural units of at least one compound selected from the group consisting of carboxylic acids and anhydrides thereof.
Claim 4
Dependent Claim
16 words
A polyolefin-base resin composition according to claim 1, wherein the melt index is 20 to 70.
Claim 5
Dependent Claim
45 words
A polyolefin-base resin composition according to claim 1, wherein said polyolefin-base resin is a polyolefin resin combined with at least one carboxylic acid, said carboxylic acid being selected from the group consisting of maleic acid, fumaric acid, endobicyclo-(2,2,1)-1-heptene-2,3-dicarboxylic acid, cis-4-cyclohexene-1,2-dicarboxylic acid and endobicyclo (2,2,1)-2-1,2,3,4,7,7-hexachloro-2-heptene-5,6-dicarboxylic acid.
Claim 6
Dependent Claim
45 words
A polyolefin-base resin composition according to claim 1, wherein said polyolefin-base resin is a polyolefin resin combined with at least one carboxylic acid anhydride, said carboxylic acid anhydride being selected from the group consisting of maleic anhydride, cis-4-cyclohexene-1,2dicarboxylic anhydride, endobicyclo-(2,2,1)-5-heptene-2,3dicarboxylic anhydride and endobicyclo (2,2,1)-1,2,3,4,7,7-hexachloro-2-heptene-5,6-dicarboxylic anhydride.
References Cited (Backward Citations)
US2634256A
Cited
JPS4917835A
Cited
JPS5236134A
Cited
JPS569576A
Cited
US4340513A
Cited
US4409345A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1991-01-04 | 1991-07-06 | 1992-01-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-01-04 | 1995-07-06 | 1996-01-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-01-04 | 1999-07-06 | 2000-01-05 | $7700.00 | Window Closed / Lapsed |