US3872072A
Expired / Lapsed
US
⏱️ 0.0 years remaining
New hydrogenation catalyst for elastomers, and the process of hydrogenation
Assignee: Bridgestone Firestone Inc
•
Filing: 1973-12-13
•
Granted: 1975-03-18
•
Expires: 1993-12-13
Abstract
Abstract The invention relates to the hydrogenation of an unsaturated elastomer in the presence of a catalyst which is the coordinating complex of cobaltous chloride and 1 to 8 molecules of lactam or another amide or urea reduced by a trialkyl or triaryl aluminum or a dialkyl or diaryl aluminum hydride.
Inventors
- 👤 Adel Farhan Halasa
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 04:22
CPC Classifications
B; B01; B01J; B01J31/00; B01J31/16; B01J31/22; B01J31/2204; B01J31/2208; B01J31/02; B01J31/12; B01J31/14; B01J31/143; B01J31/18; B01J31/1805; B01J31/26; B01J31/28; B01J31/30; C; C08; C08C; C08C19/00; C08C19/02; B01J2231/00; B01J2231/60; B01J2231/64; B01J2231/641; B01J2231/645; B01J2231/646; B01J2531/00; B01J2531/02; B01J2531/0213; B01J2531/0216; B01J2531/80; B01J2531/84; B01J2531/845
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
48 words
THE PROCESS OF HYDROGENATING AN UNSATURATED ELASTOMER WHICH COMPRISES HYDROGENATING THE SAME IN SOLUBLE IN AN ALIPHATIC SOLVENT IN THE PRESENCE OF 0.02 MM TO 1.0 MM PER GRAM OF ELASTOMER OF A CATALYST WHICH IS REDUCED COBALTOUS CHLORIDE. (LACTAM)6 OR 8 CATALYST WHICH LACTAM HAVING THE FORMULA
Claim 2
Dependent Claim
48 words
THE PROCESS OF HYDROGENATING AN UNSATURATED ELASTOMER WHICH COMPRISES HYDROGENATING THE SAME IN SOLUBLE IN AN ALIPHATIC SOLVENT IN THE PRESENCE OF 0.02 MM TO 1.0 MM PER GRAM OF ELASTOMER OF A CATALYST WHICH IS REDUCED COBALTOUS CHLORIDE. (LACTAM)6 OR 8 CATALYST WHICH LACTAM HAVING THE FORMULA
Claim 3
Dependent Claim
65 words
The process of claim 1 in which the elastomer is from the class consisting of homopolymers of conjugated dienes containing 4 to 8 carbon atoms, copolymers of such conjugated dienes and copolymers of such conjugated dienes and vinyl monomers and the hydrogenation is effected with a reduced cobaltous chloride.(lactam)6 or 8 catalyst at 25* to 150* C. at a pressure of 100 to 300 psig.
Claim 4
Dependent Claim
33 words
The process of claim 1 in which the polymer is hydrogenated with cobaltous chloride.(caprolactam)6 or 8 catalyst at a temperature of 0* to 100* C. and a pressure of 25 to 500 psig.
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) | 1978-03-17 | 1978-09-16 | 1979-03-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-03-17 | 1982-09-16 | 1983-03-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-03-17 | 1986-09-16 | 1987-03-18 | $7700.00 | Window Closed / Lapsed |