Patent US3988227A successfully refreshed from Google Patents.
US3988227A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Oil-resistant EPDM elastomer
Assignee: Motors Liquidation Co
•
Filing: 1975-04-28
•
Granted: 1976-10-26
•
Expires: 1995-04-28
Abstract
Abstract In accordance with a preferred embodiment of this invention, a high temperature oil resistant ethylene-propylene-diene monomer (hereinafter EPDM) elastomer is produced. This product is basically the high energy radiation induced reaction product of, by weight, about 100 parts of an uncured conventional EPDM elastomer, from 15 to 25 parts of trimethylolpropanetrimethacrylate (hereinafter TMPT), from 15 to 80 parts of a reinforcing filler and from 0 to 40 parts of an extender oil.
Inventors
- 👤 Roger J. Eldred
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 18:21
CPC Classifications
C; C08; C08F; C08F255/00; C08F255/02; C08F255/06; C08K; C08K5/00; C08K5/04; C08K5/10; C08K5/101; C08K5/103
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
88 words
A high temperature, oil resistant elastomer having an equilibrium volume swell fraction, v 2 , in toluene of from about one-fourth to about one-half produced by subjecting a uniform mixture to from 10 to 30 Mrads of high energy ionizing radiation, said mixture comprising by weight from about 5 to about 40 parts of a polymerizable acrylic cross-linking monomer having two or more points of ethylenic unsaturation and from about 15 to 80 parts of a reinforcing filler and about 100 parts of an uncured ethylene-propylene-diene monomer elastomer.
Claim 2
Dependent Claim
88 words
A high temperature, oil resistant elastomer having an equilibrium volume swell fraction, v 2 , in toluene of from about one-fourth to about one-half produced by subjecting a uniform mixture to from 10 to 30 Mrads of high energy ionizing radiation, said mixture comprising by weight from about 5 to about 40 parts of a polymerizable acrylic cross-linking monomer having two or more points of ethylenic unsaturation and from about 15 to 80 parts of a reinforcing filler and about 100 parts of an uncured ethylene-propylene-diene monomer elastomer.
Claim 3
Dependent Claim
84 words
A high temperature, oil resistance elastomer having an equilibrium volume swell fraction, v 2 , in toluene of from about one-fourth to about one-half produced by subjecting a uniform mixture to from 10 to 30 Mrads of high energy ionizing radiation said mixture comprising by weight: (a) from about 5 to about 40 parts by weight of trimethylolpropanetrimethacrylate, (b) from about 15 to 80 parts by weight of reinforcing carbon black and (c) about 100 parts by weight of an uncured ethylene-propylene-diene monomer elastomer.
Claim 4
Dependent Claim
84 words
A high temperature, oil resistance elastomer having an equilibrium volume swell fraction, v 2 , in toluene of from about one-fourth to about one-half produced by subjecting a uniform mixture to from 10 to 30 Mrads of high energy ionizing radiation said mixture comprising by weight: (a) from about 5 to about 40 parts by weight of trimethylolpropanetrimethacrylate, (b) from about 15 to 80 parts by weight of reinforcing carbon black and (c) about 100 parts by weight of an uncured ethylene-propylene-diene monomer elastomer.
Claim 5
Dependent Claim
107 words
A high temperature, oil resistant elastomer having an equilibrium volume swell fraction, v 2 , in toluene of from about one-fourth to about one-half produced by subjecting a uniform mixture to a high energy ionizing radiation dose of from 10 to 30 Mrads, said mixture comprising by weight: (a) from about 5 to about 40 parts by weight of a polymerizable acrylic cross-linking monomer selected from the group consisting of trimethylolpropanetrimethacrylate, ethylene glycol dimethacrylate, trimethylolpropanetriacrylate, ethylene glycol diacrylate, polyethylene glycol dimethacrylate and polyethylene glycol diacrylate, (b) from about 15 to 80 parts of a reinforcing filler and (c) about 100 parts of an uncured ethylene-propylene-diene monomer elastomer.
Claim 6
Dependent Claim
107 words
A high temperature, oil resistant elastomer having an equilibrium volume swell fraction, v 2 , in toluene of from about one-fourth to about one-half produced by subjecting a uniform mixture to a high energy ionizing radiation dose of from 10 to 30 Mrads, said mixture comprising by weight: (a) from about 5 to about 40 parts by weight of a polymerizable acrylic cross-linking monomer selected from the group consisting of trimethylolpropanetrimethacrylate, ethylene glycol dimethacrylate, trimethylolpropanetriacrylate, ethylene glycol diacrylate, polyethylene glycol dimethacrylate and polyethylene glycol diacrylate, (b) from about 15 to 80 parts of a reinforcing filler and (c) about 100 parts of an uncured ethylene-propylene-diene monomer elastomer.
References Cited (Backward Citations)
US3084115A
Cited
US3542661A
Cited
US3650669A
Cited
US3627658A
Cited
US3789042A
Cited
US3852177A
Cited
US3894118A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-10-26 | 1980-04-26 | 1980-10-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-10-26 | 1984-04-26 | 1984-10-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-10-26 | 1988-04-26 | 1988-10-26 | $7700.00 | Window Closed / Lapsed |