Patent US4228401A successfully refreshed from Google Patents.
Patent US4460722A successfully refreshed from Google Patents.
US4100123A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polychloroprene-containing blends
Assignee: BP PLC
•
Filing: 1977-01-13
•
Granted: 1978-07-11
•
Expires: 1997-01-13
Abstract
Abstract Blends comprising (1) a rubber component containing polychloroprene and a defined amount of EPDM, (2) hardened extract, (3) a vulcanization agent.
Inventors
- 👤 Peter Henry Westermann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 23:42
CPC Classifications
C; C08; C08L; C08L11/00; C08L23/00; C08L23/02; C08L23/16; C08L95/00
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
115 words
A vulcanizable composition comprising (a) a rubber component containing a polychloroprene and a rubbery terpolymer of ethylene, propylene, and a diene or triene monomer said terpolymer containing at least 50% by weight of units derived from ethylene the weight ratio of said polychloroprene to said terpolymer of from 1:005 to 1:1.5, and (b) 3 to 300 parts by weight, per 100 parts by weight of rubbery component of a hardened extract obtained by blowing air at 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 and having a saturated hydrocarbon content of not more than 10% by weight.
Claim 2
Dependent Claim
115 words
A vulcanizable composition comprising (a) a rubber component containing a polychloroprene and a rubbery terpolymer of ethylene, propylene, and a diene or triene monomer said terpolymer containing at least 50% by weight of units derived from ethylene the weight ratio of said polychloroprene to said terpolymer of from 1:005 to 1:1.5, and (b) 3 to 300 parts by weight, per 100 parts by weight of rubbery component of a hardened extract obtained by blowing air at 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 and having a saturated hydrocarbon content of not more than 10% by weight.
Claim 3
Dependent Claim
10 words
A composition according to claim 1 containing a vulcanisation agent.
Claim 4
Dependent Claim
19 words
A composition according to claim 1 wherein the polychloroprene has a Mooney viscosity (ML 1+4) of 55 to 65.
Claim 5
Dependent Claim
19 words
A composition according to claim 1 wherein the said terpolymer contains 70% by weight of units derived from ethylene
Claim 6
Dependent Claim
33 words
A composition according to claim 4 wherein the said terpolymer contains 49 to 20% by weight of units derived from propylene and 1 to 5% by weight of units derived from diene monomer.
Claim 7
Dependent Claim
12 words
A composition according to claim 5 wherein the diene monomer is ethylidene-norbornene.
Claim 8
Dependent Claim
22 words
A composition according to claim 1 wherein there are at least 0.08 parts of said terpolymer per part of polychloroprene by weight.
Claim 9
Dependent Claim
22 words
A composition according to claim 7 wherein there are at least 0.1 parts of said terpolymer per part of polychloroprene by weight.
Claim 10
Dependent Claim
25 words
A composition according to claim 7 wherein there are not more than 1.2 parts by weight of said terpolymer per part of polychloroprene by weight.
Claim 11
Dependent Claim
22 words
A composition according to claim 1 wherein the said hardened extract has a softening point in the range 85° to 150° C.
Claim 12
Dependent Claim
22 words
A composition according to claim 10 wherein the said hardened extract has a softening point in the range 100° to 150° C.
Claim 13
Dependent Claim
24 words
A composition according to claim 10 which contains at least 15 parts by weight of said hardened extract per 100 parts of rubber component.
Claim 14
Dependent Claim
24 words
A composition according to claim 12 which contains at least 25 parts by weight of said hardened extract per 100 parts of rubber components.
Claim 15
Dependent Claim
24 words
A composition according to claim 13 which contains at least 45 parts by weight of said hardened extract per 100 parts of rubber component.
Claim 16
Dependent Claim
25 words
A composition according to claim 14 which contains not more than 200 parts by weight of said hardened extract per 100 parts of rubber components.
Claim 17
Dependent Claim
23 words
A composition according to claim 15 which contains not more than 150 parts of said hardened extract per 100 parts of rubber component.
Claim 18
Dependent Claim
17 words
A vulcanised article made by heating a composition according to claim 2 which contains a vulcanising agent.
Claim 19
Dependent Claim
17 words
An article made by subjecting a composition according to claim 2 to a forming operation before vulcanisation.
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) | 1981-07-10 | 1982-01-09 | 1982-07-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-07-10 | 1986-01-09 | 1986-07-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-07-10 | 1990-01-09 | 1990-07-11 | $7700.00 | Window Closed / Lapsed |