Patent US4404312A successfully refreshed from Google Patents.
US4404312A
Expired / Lapsed
US
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Fiber-reinforced polymer blend composition
Assignee: Toyobo Co Ltd
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Filing: 1982-04-19
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Granted: 1983-09-13
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Expires: 2002-04-19
Abstract
Abstract A fiber-reinforced polymer blend composition comprising (a) a polyamide resin, (b) a modified polypropylene resin having a melt flow index of 1 to 50 g/10 minutes and at least one carboxyl group in the molecule and (c) a fiber-reinforcing agent, the weight ratio of the polyamide resin (a) and the polypropylene resin (b) being from 70:30 to 95:5 and a content of the fiber-reinforcing agent (c) being from 50 to 200% by weight on the basis of the total amount of the polyamide resin (a) and the polyprolylene resin (b), which is excellent in heat resistance, water resistance, impact resistance and surface resistance.
Inventors
- 👤 Tokio Kokubu
- 👤 Katsuo Take
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 23:42
CPC Classifications
C; C08; C08L; C08L77/00; C08L77/06
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
90 words
A fiber-reinforced polymer blend composition comprising (a) a polyamide resin, (b) a modified polypropylene resin having a melt flow index of 1 to 50 g/10 minutes and at least one carboxyl group in the molecule and (c) a fiber-reinforcing agent, the weight ratio of the polyamide resin (a) and the polypropylene resin (b) being from 70:30 to 95:5 and a content of the fiber-reinforcing agent (c) being from 50 to 200% by weight on the basis of the total amount of the polyamide resin (a) and the polypropylene resin (b).
Claim 2
Dependent Claim
90 words
A fiber-reinforced polymer blend composition comprising (a) a polyamide resin, (b) a modified polypropylene resin having a melt flow index of 1 to 50 g/10 minutes and at least one carboxyl group in the molecule and (c) a fiber-reinforcing agent, the weight ratio of the polyamide resin (a) and the polypropylene resin (b) being from 70:30 to 95:5 and a content of the fiber-reinforcing agent (c) being from 50 to 200% by weight on the basis of the total amount of the polyamide resin (a) and the polypropylene resin (b).
Claim 3
Dependent Claim
22 words
The composition according to claim 1, wherein the polypropylene resin (b) has a melt flow index of 1 to 20 g/10 minutes.
Claim 4
Dependent Claim
31 words
The composition according to claim 1, wherein the polypropylene resin (b) is a copolymer of propylene and an ethylenically unsaturated carboxylic acid or its derivative in a weight proportion of 100:0.02-5.
Claim 5
Dependent Claim
45 words
The composition according to claim 1, wherein the polypropylene resin (b) is a graft copolymer of polypropylene grafted with an ethylenically unsaturated carboxylic acid or its derivative in an amount of 0.02 to 5 parts by weight based on 100 parts by weight of polypropylene.
Claim 6
Dependent Claim
34 words
The composition according to claim 4, wherein the amount of the ethylenically unsaturated carboxylic acid or its derivative is from 0.1 to 0.5 part by weight based on 100 parts by weight of polypropylene.
Claim 7
Dependent Claim
55 words
The composition according to claim 1, wherein the polypropylene resin (b) is a polymer prepared by meltkneading polypropylene and an ethylenically unsaturated carboxylic acid or its derivative in a weight proportion of 100:0.02-5 in the presence of not more than 0.03 part by weight of an organic peroxide to 100 parts by weight of polypropylene.
Claim 8
Dependent Claim
18 words
The composition according to claim 3, wherein the ethylenically unsaturated carboxylic acid or its derivative is maleic anhydride.
Claim 9
Dependent Claim
17 words
The composition according to claim 1, wherein the polyamide resin (a) comprises polycapraamide as the major component.
Claim 10
Dependent Claim
13 words
The composition according to claim 1, wherein the fiber-reinforcing agent is glass fibers.
Claim 11
Dependent Claim
25 words
The composition according to claim 1, wherein the weight ratio of the polyamide resin (a) to the polypropylene resin (b) is from 75:25 to 95:5.
Claim 12
Dependent Claim
15 words
A molded product prepared by injection-molding the fiber-reinforced polymer blend composition according to claim 1.
Claim 13
Dependent Claim
11 words
The molded product according to claim 11, which is a container.
References Cited (Backward Citations)
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JPS53120761A
Cited
GB2052528A
Cited
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US4339555A
Cited
US4346194A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1986-09-12 | 1987-03-14 | 1987-09-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-09-12 | 1991-03-14 | 1991-09-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-09-12 | 1995-03-14 | 1995-09-13 | $7700.00 | Window Closed / Lapsed |