US4337329A
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Process for hydrogenation of conjugated diene polymers
Assignee: Zeon Corp
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Filing: 1980-11-26
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Granted: 1982-06-29
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Expires: 2000-11-26
Abstract
Abstract In a process which comprises catalytically hydrogenating the carbon-carbon double bonds of a conjugated diene polymer, the improvement which comprises using a catalyst composed of a porous powdery or granular carrier and supported thereon both Pd and at least one metal selected from the group consisting of the metals of Groups Ia, IIa, IIIa, IIIb, IVa, Va and VIa of the periodic table, Ge and Sb.
Inventors
- 👤 Yoichiro Kubo
- 👤 Kiyomori Ohura
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 13:23
CPC Classifications
C; C08; C08C; C08C19/00; C08C19/02
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
93 words
In a process which comprises catalytically hydrogenating the carbon-carbon double bonds of an unsaturated polymer prepared from 10 to 100% by weight of a conjugated diene monomer unit and 90 to 0% by weight of an ethylenically unsaturated monomer unit, the improvement which comprises using a catalyst composed of a porous powdery or granular carrier having supported thereon both Pd and at least one metal selected from the group consisting of the metals of Groups Ia, IIa, IVa, and VA of the periodic table, Ge Sb, Sc, B, Al, Ga, W and Mo.
Claim 2
Dependent Claim
93 words
In a process which comprises catalytically hydrogenating the carbon-carbon double bonds of an unsaturated polymer prepared from 10 to 100% by weight of a conjugated diene monomer unit and 90 to 0% by weight of an ethylenically unsaturated monomer unit, the improvement which comprises using a catalyst composed of a porous powdery or granular carrier having supported thereon both Pd and at least one metal selected from the group consisting of the metals of Groups Ia, IIa, IVa, and VA of the periodic table, Ge Sb, Sc, B, Al, Ga, W and Mo.
Claim 3
Dependent Claim
19 words
The process of claim 1 wherein the carrier is silica, silicaalumina, alumina, diatomaceous earth, activated carbon or carbon black.
Claim 4
Dependent Claim
26 words
The process of claim 1 wherein the atomic ratio of said at least one metal to Pd is in the range of from 0.001 to 50.
Claim 5
Dependent Claim
24 words
The process of claim 1 wherein the amount of Pd deposited is 0.001 to 30% by weight based on the weight of the carrier.
Claim 6
Dependent Claim
26 words
The process of claim 1 wherein the amount of the catalyst is 5 to 2000 ppm calculated as Pd based on the weight of the polymer.
References Cited (Backward Citations)
GB2011911A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1985-06-28 | 1985-12-28 | 1986-06-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-06-28 | 1989-12-28 | 1990-06-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-06-28 | 1993-12-28 | 1994-06-29 | $7700.00 | Window Closed / Lapsed |