Patent US3882060A successfully refreshed from Google Patents.
US3882060A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Oil resistant rubber composition
Assignee: Centrilift Hughes Inc
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Filing: 1973-11-14
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Granted: 1975-05-06
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Expires: 1993-11-14
Abstract
Abstract A rubber composition containing epichlorohydrin homopolymer with various compounding ingredients which composition exhibits extraordinary physical and chemical properties under adverse conditions. The composition is compounded to withstand degradation where exposed to oil, water and brine at temperatures in excess of 250*F. and pressures as high as 4,000 pounds per square inch.
Inventors
- 👤 Raymond L Guzy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 14:08
CPC Classifications
C; C08; C08K; C08K13/00; C08K13/02; Y; Y10; Y10S; Y10S166/00; Y10S166/902
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
153 words
AN EPICHLOROHYDRIN HOMOPOLYMER RUBBER COMPOSITION CAPABLE OF BEING CURED AND THEN CAPABLE OF WITHSTANDING 4,000 PSI PRESSURE AT 275*F. FOR AT LEAST 7 DAYS WITH LESS THAN ABOUT 5% VOLUME SWELL FROM BRINE EXPOSURE AND LESS THAN ABOUT 5% VOLUME CHANGE FROM OIL EXPOSURE, SAID COMPOSITION COMPRISED OF ABOUT 100 PARTS BY WEIGHT OF AN EPICHLOROHYDRIN HOMOPOLYMER RUBBER HAVING A MOLECULAR WEIGHT IN EXCESS OF 200,000; ABOUT 1-2 PARTS BY WEIGHT OF NICKEL DIBUTYL DITHIOCARBAMATE; ABOUT 10-15 PARTS BY WEIGHT OF BASIC LEAD PHOSPHITE; ABOUT 1 PART BY WEIGHT PHENOTHIAZINE; ABOUT 4-6 PARTS BY WEIGHT OF AN ALIPHATIC DICARBOXYLIC ACID; ABOUT 0.125 TO 0.2 PARTS BY WEIGHT OF A DIMETHYL DITHIOCARBAMATE SELECTED FROM THE GROUP CONSISTING OF COPPER DIMETHYL DITHIOCARBAMATE AND ; ABOUT 1-2 PARTS BY WEIGHT OF A IMIDAZOLE; AND FROM ABOUT 10 TO ABOUT 50 PARTS BY WEIGHT OF A FILLER SELECTED FROM THE GROUP CONSISTING OF SILICA AND CARBON BLACK.
Claim 2
Dependent Claim
153 words
AN EPICHLOROHYDRIN HOMOPOLYMER RUBBER COMPOSITION CAPABLE OF BEING CURED AND THEN CAPABLE OF WITHSTANDING 4,000 PSI PRESSURE AT 275*F. FOR AT LEAST 7 DAYS WITH LESS THAN ABOUT 5% VOLUME SWELL FROM BRINE EXPOSURE AND LESS THAN ABOUT 5% VOLUME CHANGE FROM OIL EXPOSURE, SAID COMPOSITION COMPRISED OF ABOUT 100 PARTS BY WEIGHT OF AN EPICHLOROHYDRIN HOMOPOLYMER RUBBER HAVING A MOLECULAR WEIGHT IN EXCESS OF 200,000; ABOUT 1-2 PARTS BY WEIGHT OF NICKEL DIBUTYL DITHIOCARBAMATE; ABOUT 10-15 PARTS BY WEIGHT OF BASIC LEAD PHOSPHITE; ABOUT 1 PART BY WEIGHT PHENOTHIAZINE; ABOUT 4-6 PARTS BY WEIGHT OF AN ALIPHATIC DICARBOXYLIC ACID; ABOUT 0.125 TO 0.2 PARTS BY WEIGHT OF A DIMETHYL DITHIOCARBAMATE SELECTED FROM THE GROUP CONSISTING OF COPPER DIMETHYL DITHIOCARBAMATE AND ; ABOUT 1-2 PARTS BY WEIGHT OF A IMIDAZOLE; AND FROM ABOUT 10 TO ABOUT 50 PARTS BY WEIGHT OF A FILLER SELECTED FROM THE GROUP CONSISTING OF SILICA AND CARBON BLACK.
Claim 3
Dependent Claim
40 words
The composition of claim 1 wherein processing aids selected from the group consisting of sorbitan monostearate, dibutoxyethoxyethyl adipate and polyethylene emulsions are added in an amount of from about 1-10 parts by weight per 100 parts by weight of rubber.
Claim 4
Dependent Claim
90 words
An epichlorohydrin rubber composition containing 100 parts by weight epichlorohydrin homopolymer, about 1.0 part by weight nickel dibutyl dithiocarbamate, about 10 parts by weight basic lead phosphite; about 1.0 part by weight phenothiazine, about 4.0 parts by weight azelaic acid, about .125 parts by weight copper dimethyl dithiocarbamate, about 1.0 part by weight imidazole, about 10 parts by weight silica, about 30 parts by weight carbon black, about 1.5 parts by weight sorbitan monostearate, about 1.0 part by weight dibutoxy ethyoxyethyl adipate, about 0.5 part by weight polyethylene emulsion therein.
Claim 5
Dependent Claim
90 words
An epichlorohydrin rubber composition containing 100 parts by weight epichlorohydrin homopolymer, about 1.0 part by weight nickel dibutyl dithiocarbamate, about 10 parts by weight basic lead phosphite; about 1.0 part by weight phenothiazine, about 4.0 parts by weight azelaic acid, about .125 parts by weight copper dimethyl dithiocarbamate, about 1.0 part by weight imidazole, about 10 parts by weight silica, about 30 parts by weight carbon black, about 1.5 parts by weight sorbitan monostearate, about 1.0 part by weight dibutoxy ethyoxyethyl adipate, about 0.5 part by weight polyethylene emulsion therein.
References Cited (Backward Citations)
US3388105A
Cited
US3425961A
Cited
US3503910A
Cited
US3598765A
Cited
US3414529A
Cited
US3700650A
Cited
US3790506A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-05-05 | 1978-11-04 | 1979-05-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-05-05 | 1982-11-04 | 1983-05-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-05-05 | 1986-11-04 | 1987-05-06 | $7700.00 | Window Closed / Lapsed |