US3900532A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Low viscosity pasty rubber compositions
Assignee: Bayer AG
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Filing: 1973-07-02
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Granted: 1975-08-19
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Expires: 1993-07-02
Abstract
Abstract A pasty vulcanisable rubber mixture free from sulphur, containing 100 parts by weight of a high molecular weight rubber which contains OH, SH, NH, NH2, COOH, Cl or Br groups, 50 to 400 parts by weight of a liquid polymer or copolymer of a diene which has a molecular weight of 400 to 10.000 and also contains OH, SH, NH, NH2, COOH, Cl or Br groups and a crosslinking agent for the OH, SH, NH, NH2, COOH, Cl or Br groups present.
Inventors
- 👤 Manfred Dietrich
- 👤 Jochen Schnetger
- 👤 Friedrich Haas
- 👤 Gunter Marwede
- 👤 Hansgunter Appel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 08:33
CPC Classifications
C; C08; C08F; C08F236/00; C08F236/02; C08F236/04; C08L; C08L19/00; C08L19/006; C08K; C08K3/00; C08K3/18; C08K3/20; C08K3/22; C08L79/00; C08L79/02
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
102 words
A PASTY VULCANIZABLE RUBBER WHICH IS FREE OF ELEMENTAL SULPHUR COMPRISING A. 100 PARTS BY WEIGHT OF A HIGH MOLEUCLAR WEIGHT RUBBER CONTAINING 0.5 TO 8% BY WEIGHT OF LIQUID HOMOPOLYMER OR 5. 50 TO 40 PARTS BY WEIGHT OF A LIQUID HOMOPOLYMER OR COPOLYMER OF A DIENE HAVING A MOLECULAR WEIGHT OF 400 TO 10,000 AND CONTAINING 0.5 TO 8% BY WEIGHT OF OH OR COOH GROUPS AND C. 0.5 TO 10 EQUIVALENTS PER EQUIVALENT OF SAID OH AND COOH GROUPS PRESENT IN SAID MIXTURE OF A CROSSLINKING AGENT WHICH IS CAPABLE OF REACTING WITH THE OH AND COOH GROUPS PRESENT.
Claim 2
Dependent Claim
102 words
A PASTY VULCANIZABLE RUBBER WHICH IS FREE OF ELEMENTAL SULPHUR COMPRISING A. 100 PARTS BY WEIGHT OF A HIGH MOLEUCLAR WEIGHT RUBBER CONTAINING 0.5 TO 8% BY WEIGHT OF LIQUID HOMOPOLYMER OR 5. 50 TO 40 PARTS BY WEIGHT OF A LIQUID HOMOPOLYMER OR COPOLYMER OF A DIENE HAVING A MOLECULAR WEIGHT OF 400 TO 10,000 AND CONTAINING 0.5 TO 8% BY WEIGHT OF OH OR COOH GROUPS AND C. 0.5 TO 10 EQUIVALENTS PER EQUIVALENT OF SAID OH AND COOH GROUPS PRESENT IN SAID MIXTURE OF A CROSSLINKING AGENT WHICH IS CAPABLE OF REACTING WITH THE OH AND COOH GROUPS PRESENT.
Claim 3
Dependent Claim
27 words
The mixture of claim 1 wherein said crosslinking agent is polyisocyanate, a polyamine, a polyvalent metal oxide, an epoxide, a carbodiimide, a carboxy compound or an oxazoline.
Claim 4
Dependent Claim
10 words
The vulcanizate produced by heating the mixture of claim 1.
References Cited (Backward Citations)
CA740039A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-08-18 | 1979-02-17 | 1979-08-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-08-18 | 1983-02-17 | 1983-08-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-08-18 | 1987-02-17 | 1987-08-19 | $7700.00 | Window Closed / Lapsed |