US3781185A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Metal and chloroprene rubber composite material
Assignee: Bando Chemical Industries Ltd
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Filing: 1970-06-18
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Granted: 1973-12-25
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Expires: 1990-06-18
Abstract
Abstract A vulcanizing agent and other component chemicals necessary for rubber formulation are added to a coprecipitate containing chloroprene rubber and barium silicate, and the rubber compound so obtained is subjected to blending. Further, the rubber compound is overlaid with a metal sheet and vulcanized under application of heat and pressure, whereby a metal and chloroprene rubber composite material is produced.
Inventors
- 👤 H Takamatsu
- 👤 N Murashima
- 👤 K Nishihira
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 09:40
CPC Classifications
B; B32; B32B; B32B15/00; B32B15/04; B32B15/06; C; C08; C08J; C08J3/00; C08J3/20; C08J3/205; C08J3/21; C08J3/215; B32B25/00; B32B25/04; B32B25/042; B32B25/14; C08J5/00; C08J5/12; C08K; C08K3/00; C08K3/34; B32B2307/00; B32B2307/70; B32B2307/712; B32B2419/00; C08J2311/00; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31678; Y10T428/31692; Y10T428/31696
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
52 words
A composite material comprising a metal portion and a rubber portion bonded integrally with said metal portion, said rubber portion comprising a vulcanized rubber composition containing a chloroprene rubber-barium silicate coprecipitate, said chloroprene rubber-barium coprecipitate containing at least 80 parts of barium silicate per 100 parts of chloroprene rubber in said coprecipitate.
Claim 2
Dependent Claim
88 words
A process for making a composite material having a rubber portion bonded integrally with a metal portion comprising overlaying a rubber mixture selected from (a) an admixture of component chemicals for formulation, and a chloroprene-barium sIlicate coprecipitate, and (b) a rubber composition containing a chloroprene rubber-barium silicate coprecipitate, on said metal portion, said chloroprene rubber-barium coprecipitate containing at least 80 parts of barium silicate per 100 parts of chloroprene rubber in said coprecipitate, and vulcanizing and bonding said rubber mixture to said metal portion under pressure and heat.
Claim 3
Dependent Claim
56 words
The process of claim 3 wherein said chloroprene rubber-barium silicate is manufactured by adding an aqueous solution of a barium salt to a mixture of chloroprene rubber and an aqueous solution of an alkali metal salt of silicic acid, thereby a chloroprene rubber-barium silicate coprecipitate is obtained, and washing with water and then drying said coprecipitate.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-12-24 | 1977-06-25 | 1977-12-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-12-24 | 1981-06-25 | 1981-12-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-12-24 | 1985-06-25 | 1985-12-25 | $7700.00 | Window Closed / Lapsed |