US4036799A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Compositions containing polychloroprene
Assignee: BP PLC
•
Filing: 1976-02-26
•
Granted: 1977-07-19
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Expires: 1996-02-26
Abstract
Abstract Polychloroprene blends contain 3 - 300 parts by weight of polychloroprene of hardened extract. They may be produced by mixing latices.
Inventors
- 👤 Peter Henry Westermann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 19:45
CPC Classifications
C; C08; C08L; C08L11/00; C08L11/02; C08L95/00; C08L95/005
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
67 words
A vulcanizable composition comprising polychloroprene and 3 to 300 parts by weight, per 100 parts of polychloroprene of hardened extract obtained by blowing air at an elevated temperature into a solvent extract of a distillate petroleum fraction boiling in the lubricating oil boiling range and containing a major proportion of aromatic hydrocarbons, said hardened extract having a saturated hydrocarbon content of not more than 10% by weight.
Claim 2
Dependent Claim
67 words
A vulcanizable composition comprising polychloroprene and 3 to 300 parts by weight, per 100 parts of polychloroprene of hardened extract obtained by blowing air at an elevated temperature into a solvent extract of a distillate petroleum fraction boiling in the lubricating oil boiling range and containing a major proportion of aromatic hydrocarbons, said hardened extract having a saturated hydrocarbon content of not more than 10% by weight.
Claim 3
Dependent Claim
12 words
A vulcanisable composition according to claim 1 which contains a vulcanisation agent.
Claim 4
Dependent Claim
20 words
A composition according to claim 1 wherein the hardened extract has a softening point in the range of 50°-200° C.
Claim 5
Dependent Claim
15 words
A composition according to claim 3 wherein the softening point in the range 85°-170° C.
Claim 6
Dependent Claim
24 words
The composition according to claim 3 wherein thhe content of asphaltenes plus toluene insolubles in the hardened extract is at least 20% by weight.
Claim 7
Dependent Claim
30 words
The composition according to claim 1 wherein the polychloroprene is a polymer made from a monomeric material containing not more than 15%, by weight of total monomeric material, of comonomer.
Claim 8
Dependent Claim
21 words
The composition according to claim 6 wherein the polychloroprene rubber has a Mooney viscosity (ML1 + 4) from 30 to 120.
Claim 9
Dependent Claim
17 words
A composition according to claim 7 wherein the Mooney viscosity is in the range 35 to 55.
Claim 10
Dependent Claim
20 words
A composition according to claim 1 which contains more than 100 parts of hardened extract per 100 parts of polychloroprene.
Claim 11
Dependent Claim
20 words
A composition according to claim 9 which contains 120 to 200 parts of hardened extract per 100 parts of polychloroprene.
Claim 12
Dependent Claim
24 words
A composition according to claim 3 which contains not more than 150 parts by weight hardened extract per 100 parts by weight of polychloroprene.
Claim 13
Dependent Claim
27 words
A composition according to claim 4 wherein the hardened extract and the polychloroprene are mixed together at a temperature in the range 80° C. to 140° C.
Claim 14
Dependent Claim
13 words
A vulcanisable composition according to claim 1 comprising sulphur and a vulcanisation accelerator.
Claim 15
Dependent Claim
10 words
A vulcanisable composition according to claim 13 comprising ethylene thiourea.
Claim 16
Dependent Claim
16 words
A vulcanisable composition according to claim 13 wherein the polychloroprene is a mercaptan or xanthogen-modified polychloroprene.
Claim 17
Dependent Claim
24 words
A vulcanised article produced from a composition according to claim 2 the composition containing a vulcanisation system by a forming operation and heating step.
References Cited (Backward Citations)
US3639583A
Cited
US3812203A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-07-18 | 1981-01-17 | 1981-07-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-07-18 | 1985-01-17 | 1985-07-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-07-18 | 1989-01-17 | 1989-07-19 | $7700.00 | Window Closed / Lapsed |