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Patent US4522852A successfully refreshed from Google Patents.
US4522852A
Expired / Lapsed
US
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Bonded elastomeric hose assembly
Assignee: Polysar Ltd
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Filing: 1984-04-10
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Granted: 1985-06-11
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Expires: 2004-04-10
Abstract
Abstract An improved method is provided for bonding together layers of fluoroelastomer compound and butadiene-acrylonitrile polymer compound by incorporating into one or both of the compounds a polysulphidic silane compound prior to vulcanization. There is also provided a vulcanized hose having an inner layer of fluoroelastomer compound and an outer layer of a butadiene-acrylonitrile polymer compound containing a polysulphidic silane compound incorporated into either layer.
Inventors
- 👤 John R. Dunn
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 23:37
CPC Classifications
C; C08; C08J; C08J5/00; C08J5/12; B; B32; B32B; B32B25/00; B32B25/16; C08K; C08K5/00; C08K5/54; C08K5/548; Y; Y10; Y10T; Y10T428/00; Y10T428/13; Y10T428/1352; Y10T428/1386; Y10T428/139; Y10T428/1393; Y10T428/31504; Y10T428/3154
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
125 words
A hose assembly comprising two layers, the inner layer being a fluoroelastomer compound and the outer layer being a butadiene-acrylonitrile polymer compound, said fluoroelastomer compound containing a fluoroelastomer based on vinylidene fluoride and hexafluoropropylene optionally also containing tetrafluoroethylene, perfluoromethylvinyl ether or ethylenically unsaturated olefins and containing one or more inorganic acid acceptors selected from magnesium oxide, cadmium oxide, calcium oxide, calcium hydroxide and zinc oxide, containing in either layer from about 1 to about 5 parts by weight per 100 parts by weight of fluoroelastomer or of butadiene-acrylonitrile polymer of a polysulphidic silane compound, the hose assembly having been vulcanized by heating at a temperature of from about 150° C. to about 180° C. for a time of from about 10 to about 60 minutes.
Claim 2
Dependent Claim
125 words
A hose assembly comprising two layers, the inner layer being a fluoroelastomer compound and the outer layer being a butadiene-acrylonitrile polymer compound, said fluoroelastomer compound containing a fluoroelastomer based on vinylidene fluoride and hexafluoropropylene optionally also containing tetrafluoroethylene, perfluoromethylvinyl ether or ethylenically unsaturated olefins and containing one or more inorganic acid acceptors selected from magnesium oxide, cadmium oxide, calcium oxide, calcium hydroxide and zinc oxide, containing in either layer from about 1 to about 5 parts by weight per 100 parts by weight of fluoroelastomer or of butadiene-acrylonitrile polymer of a polysulphidic silane compound, the hose assembly having been vulcanized by heating at a temperature of from about 150° C. to about 180° C. for a time of from about 10 to about 60 minutes.
Claim 3
Dependent Claim
19 words
The hose assembly of claim 1 wherein the polysulphidic silane compound is selected from a bis-[alkoxysilyl-alkyl]-tetrasulphide and a bis-[alkoxysilyl-aryl]-tetrasulphide.
Claim 4
Dependent Claim
17 words
The hose assembly of claim 2 wherein the polysulphidic silane compound is selected from bis-[3-triethoxysilyl)-propyl]-tetrasulphide and bis-[triethoxysilyl-ethyltolylene]-tetrasulphide.
Claim 5
Dependent Claim
48 words
The hose assembly of claim 3 wherein the fluoroelastomer compound comprises a fluoroelastomer, an incorporated cure system, one or more inorganic acid acceptors selected from magnesium oxide, cadmium oxide, calcium oxide, calcium hydroxide and zinc oxide, and one or more fillers selected from carbon black, silica and barytes.
Claim 6
Dependent Claim
72 words
The hose assembly of claim 4 wherein the butadiene-acrylonitrile polymer contains from about 20 to about 50 weight percent of acrylonitrile and the butadiene-acrylonitrile polymer compound comprises the butadiene-acrylonitrile polymer, one or more fillers selected from carbon black, silica and barytes, optionally a compatible plasticizer, one or more metal oxides selected from magnesium oxide, cadmium oxide, calcium oxide and zinc oxide, one or more antioxidants, an organic peroxide and a curing coagent.
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) | 1988-06-10 | 1988-12-10 | 1989-06-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-06-10 | 1992-12-10 | 1993-06-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-06-10 | 1996-12-10 | 1997-06-11 | $7700.00 | Window Closed / Lapsed |