US4567238A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polyamide-rubber blended composition
Assignee: Toyoda Gosei Co Ltd
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Filing: 1984-10-31
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Granted: 1986-01-28
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Expires: 2004-10-31
Abstract
Abstract The present invention describes a polyamide-rubber blended composition having improved resistance to ozone, stress whitening and gasoline prepared by mixing together with heating the following components: (a) from 70 to 20 volume percent of a rubber composition consisting of: (i) 30 to 70 volume percent of an acrylonitrile-butadine copolymer rubber containing at least 0.8 weight percent of an epoxy group in the polymer, and (ii) 30 to 80 volume percent of an epichlorohydrin rubber; (b) 30 to 80 volume percent of a polyamide resin; and (c) at least 0.15 parts by weight of a carboxylic acid having a functional group calculated in terms of the weight of the carboxyl group per 100 parts by weight of the rubber composition of component (a).
Inventors
- 👤 Koji Sasaki
- 👤 Junji Koizumi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 14:56
CPC Classifications
C; C08; C08L; C08L71/00; C08L71/02; C08L71/03; C08L19/00; C08L19/006; C08L77/00; C08L77/02; C08L9/00; C08L9/02; C08K; C08K5/00; C08K5/04; C08K5/09; C08K5/092
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
118 words
A polyamide-rubber blended composition having improved resistance to ozone, stress whitening and gasoline prepared by mixing together with heating the following components: (a) from 70 to 20 volume percent of a rubber composition consisting of: (i) 30 to 70 volume percent of an acrylonitrile-butadiene copolymer rubber containing at least 0.8 weight percent of an epoxy group in the polymer, and (ii) 70 to 30 volume percent of an epichlorohydrin rubber; (b) 30 to 80 volume percent of a polyamide resin; and (c) at least 0.15 parts by weight of a carboxylic acid having a functional group calculated in terms of the weight of the carboxyl group per 100 parts by weight of the rubber composition of component (a).
Claim 2
Dependent Claim
118 words
A polyamide-rubber blended composition having improved resistance to ozone, stress whitening and gasoline prepared by mixing together with heating the following components: (a) from 70 to 20 volume percent of a rubber composition consisting of: (i) 30 to 70 volume percent of an acrylonitrile-butadiene copolymer rubber containing at least 0.8 weight percent of an epoxy group in the polymer, and (ii) 70 to 30 volume percent of an epichlorohydrin rubber; (b) 30 to 80 volume percent of a polyamide resin; and (c) at least 0.15 parts by weight of a carboxylic acid having a functional group calculated in terms of the weight of the carboxyl group per 100 parts by weight of the rubber composition of component (a).
Claim 3
Dependent Claim
39 words
The polyamide-rubber blended composition of claim 1 in which component (i) is an epoxy-containing acrylonitrile-butadiene copolymer rubber having a bound acrylonitrile content of 10 to 55 weight percent and a glass transition point of not more than 10° C.
Claim 4
Dependent Claim
46 words
The polyamide-rubber blended composition of claim 1 in which the epichlorohydrin rubber of component (a) is a homopolymer of epichlorohydrin, a copolymer of epichlorohydrin and ethylene oxide, a copolymer of epichlorohydrin and propylene oxide or a terpolymer of epichlorohydrin, ethylene or propylene oxide and allylglycidyl ether.
Claim 5
Dependent Claim
24 words
The polyamide-rubber blended composition of claim 1 in which the polyamide resin is a crystalline thermoplastic resin having an amino bond in the polymer.
Claim 6
Dependent Claim
36 words
The polyamide-rubber blended composition of claim 1 in which the polyamide resin is polycaprolactam (nylon 6), polylauryllactam (nylon 12), the condensation polymer of 11-aminoundecanoic acid (nylon 12), polyhexamethylene azelamide (nylon 6,9) or polyhexamethylene sebacamide (nylon 6,10).
Claim 7
Dependent Claim
23 words
The polyamide-rubber blended composition of claim 1 further including at least one of carbon black, white filler, plasticizer, processing aid, stabilizer or pigment.
Claim 8
Dependent Claim
39 words
The polyamide-rubber blended composition of claim 1 in which the carboxylic acid of component (c) is an aliphatic dicarboxylic acid, an aromatic dicarboxylic acid, a polyvalent carboxylic acid, an amino acid, a thiolic acid or a carboxylic acid anhydride.
Claim 9
Dependent Claim
16 words
An ozone-, stress whitening- and gasoline-resistant hose fabricated from the polyamide-rubber blended composition of claim 1.
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) | 1989-01-27 | 1989-07-29 | 1990-01-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-01-27 | 1993-07-29 | 1994-01-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-01-27 | 1997-07-29 | 1998-01-28 | $7700.00 | Window Closed / Lapsed |