US5576101A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Gas barrier rubber laminate for minimizing refrigerant leakage
Assignee: Bridgestone Corp
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Filing: 1995-04-12
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Granted: 1996-11-19
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Expires: 2015-04-12
Abstract
Abstract A gas barrier rubber laminate comprising a nylon film layer, an intermediate layer of a cured trialkoxysilane, and a rubber layer is fully flexible and pliable and has improved gas barrier properties to fluorocarbon gases. Such a gas barrier rubber laminate is prepared by modifying a surface of a nylon film with low-temperature plasma treatment or corona discharge treatment, applying an organosilane solution to the modified surface, curing the organosilane, laying a rubber layer on the cured organosilane, and curing the rubber layer thereto.
Inventors
- 👤 Shinji Saitoh
- 👤 Masato Yoshikawa
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 09:11
CPC Classifications
B; B32; B32B; B32B25/00; B32B25/04; B32B25/08; B32B1/00; B32B1/08; B32B27/00; B32B27/06; B32B27/08; B32B27/28; B32B27/283; B32B27/34; B32B38/00; B32B38/0008; C; C08; C08J; C08J5/00; C08J5/12; F; F16; F16L; F16L11/00; F16L11/04; B32B2305/00; B32B2305/72; B32B2307/00; B32B2307/70; B32B2307/724; B32B2307/7242; B32B2307/7244; B32B2310/00; B32B2310/14; B32B2383/00; B32B2597/00; F16L2011/047; Y; Y10; Y10T; Y10T428/00; Y10T428/13; Y10T428/1352; Y10T428/139; Y10T428/1393; Y10T428/26; Y10T428/266; Y10T428/31504; Y10T428/31652; Y10T428/31667; Y10T428/31725; Y10T428/31739; Y10T428/31743; Y10T428/31746; Y10T428/3175; Y10T428/31757; Y10T428/31826; Y10T428/31855; Y10T428/31931
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
104 words
A gas barrier rubber laminate for minimizing leakage of fluorocarbon gas refrigerant comprising; a film layer of a polyamide or a blend of polyamide with a polyolefin, a layer of rubber selected from the group consisting of natural rubber, butadiene rubber, styrene-butadiene copolymer rubber, chloroprene rubber, acrylonitrile-butadiene rubber and isobutylene-isoprene rubber, and an intermediate gas barrier layer therebetween composed of a cured product of an organosilane of the formula (1): ##STR3## wherein each of R 1 and R 2 is a saturated or unsaturated hydrocarbon radical or alkoxy radical, and each of R 3 and R 4 is a saturated or unsaturated hydrocarbon radical.
Claim 2
Dependent Claim
104 words
A gas barrier rubber laminate for minimizing leakage of fluorocarbon gas refrigerant comprising; a film layer of a polyamide or a blend of polyamide with a polyolefin, a layer of rubber selected from the group consisting of natural rubber, butadiene rubber, styrene-butadiene copolymer rubber, chloroprene rubber, acrylonitrile-butadiene rubber and isobutylene-isoprene rubber, and an intermediate gas barrier layer therebetween composed of a cured product of an organosilane of the formula (1): ##STR3## wherein each of R 1 and R 2 is a saturated or unsaturated hydrocarbon radical or alkoxy radical, and each of R 3 and R 4 is a saturated or unsaturated hydrocarbon radical.
Claim 3
Dependent Claim
24 words
A fluorocarbon gas rubber laminate as in claim 1 wherein said film layer has a thickness in the range of 1 to 500 μm.
Claim 4
Dependent Claim
137 words
A fluorocarbon gas barrier rubber laminate for minimizing leakage of fluorocarbon gas refrigerant comprising; a film layer of a polyamide or blend of polyamide with a polyolefin, a layer of rubber selected from the group consisting of natural rubber, butadiene rubber, styrene-butadiene copolymer rubber, chloroprene rubber, acrylonitrile-butadiene rubber and isobutylene-isoprene rubber, and an intermediate gas barrier layer therebetween, the surface of the film layer to which the intermediate gas barrier layer is formed is surface modified by low-temperature plasma treatment or corona discharge treatment, and the intermediate gas barrier layer is composed of a cured product of an organosilane of the formula (1): ##STR4## wherein each of R 1 and R 2 is a saturated or unsaturated hydrocarbon radical or alkoxy radical, and each of R 3 and R 4 is a saturated or unsaturated hydrocarbon radical.
Claim 5
Dependent Claim
137 words
A fluorocarbon gas barrier rubber laminate for minimizing leakage of fluorocarbon gas refrigerant comprising; a film layer of a polyamide or blend of polyamide with a polyolefin, a layer of rubber selected from the group consisting of natural rubber, butadiene rubber, styrene-butadiene copolymer rubber, chloroprene rubber, acrylonitrile-butadiene rubber and isobutylene-isoprene rubber, and an intermediate gas barrier layer therebetween, the surface of the film layer to which the intermediate gas barrier layer is formed is surface modified by low-temperature plasma treatment or corona discharge treatment, and the intermediate gas barrier layer is composed of a cured product of an organosilane of the formula (1): ##STR4## wherein each of R 1 and R 2 is a saturated or unsaturated hydrocarbon radical or alkoxy radical, and each of R 3 and R 4 is a saturated or unsaturated hydrocarbon radical.
Claim 6
Dependent Claim
24 words
A fluorocarbon gas rubber laminate as in claim 3 wherein said film layer has a thickness in the range of 1 to 500 μm.
References Cited (Backward Citations)
US5077135A
Cited
US5212017A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1999-11-19 | 2000-05-20 | 2000-11-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2003-11-19 | 2004-05-20 | 2004-11-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2007-11-19 | 2008-05-20 | 2008-11-19 | $7700.00 | Window Closed / Lapsed |