US4452950A
Expired / Lapsed
US
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Process for hydrogenation of carbon-carbon double bonds in an unsaturated polymer in latex form
Assignee: Goodyear Tire and Rubber Co
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Filing: 1983-02-22
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Granted: 1984-06-05
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Expires: 2003-02-22
Abstract
Abstract There is disclosed a process for the hydrogenation of carbon-carbon double bonds of an unsaturated polymer which comprises (a) combining an unsaturated polymer in latex form with (1) an oxidant selected from the group consisting of oxygen, air and hydroperoxides; (2) a reducing agent selected from the group of hydrazine and hydrates thereof; and (3) a metal ion initiator; (b) heating the mixture to a temperature from 0° C. to the reflux temperature of the reaction mixture.
Inventors
- 👤 Lawson G. Wideman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 18:04
CPC Classifications
C; C08; C08C; C08C19/00; C08C19/02; C08F; C08F8/00; C08F8/04
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
95 words
A process for hydrogenating carbon-carbon double bonds of an unsaturated polymer prepared from 5 to 100 percent by weight of a conjugated diene monomer unit and 95 to 0 percent by weight of ethylenically unsaturated monomer units which comprises (a) combining the unsaturated polymer in latex form with (1) an oxidant selected from the group consisting of oxygen, air and hydroperoxides; (2) a reducing agent selected from hydrazine and hydrates thereof; and (3) a metal ion activator; (b) heating the mixture to a temperature from 0° C. to the reflux temperature of the reaction mixture.
Claim 2
Dependent Claim
95 words
A process for hydrogenating carbon-carbon double bonds of an unsaturated polymer prepared from 5 to 100 percent by weight of a conjugated diene monomer unit and 95 to 0 percent by weight of ethylenically unsaturated monomer units which comprises (a) combining the unsaturated polymer in latex form with (1) an oxidant selected from the group consisting of oxygen, air and hydroperoxides; (2) a reducing agent selected from hydrazine and hydrates thereof; and (3) a metal ion activator; (b) heating the mixture to a temperature from 0° C. to the reflux temperature of the reaction mixture.
Claim 3
Dependent Claim
29 words
A process according to claim 1 wherein the unsaturated polymer is selected from the group comprising polyisoprene, polybutadiene, styrene/butadiene copolymers, acrylonitrile/butadiene copolymers, butadiene/isoprene copolymers, isoprene/isobutylene copolymers and natural rubber.
Claim 4
Dependent Claim
22 words
A process according to claim 1 wherein the concentration of unsaturated polymer in latex form is from 1 to 70% by weight.
Claim 5
Dependent Claim
17 words
A process according to claim 1 wherein the reaction temperature is from 20° C. to 150° C.
Claim 6
Dependent Claim
12 words
A process according to claim 1 wherein the oxidant is hydrogen peroxide.
Claim 7
Dependent Claim
31 words
A process according to claim 1 wherein the metal ion activator is a salt of a metal selected from the group consisting of copper, iron, cobalt, lead, nickel, silver and tin.
Claim 8
Dependent Claim
84 words
A process for hydrogenating carbon-carbon double bonds of an unsaturated polymer prepared from 5 to 100 percent by weight of a conjugated diene monomer unit and 95 to 0 percent by weight of ethylenically unsaturated monomer units which comprises combining the unsaturated polymer with (1) an oxidant, (2) a reducing agent, and (3) a metal ion at a temperature from 0° C. to the reflux temperature of the reaction mixture, the improvement comprising the hydrogenation of the polymer in the aqueous or latex form.
Claim 9
Dependent Claim
84 words
A process for hydrogenating carbon-carbon double bonds of an unsaturated polymer prepared from 5 to 100 percent by weight of a conjugated diene monomer unit and 95 to 0 percent by weight of ethylenically unsaturated monomer units which comprises combining the unsaturated polymer with (1) an oxidant, (2) a reducing agent, and (3) a metal ion at a temperature from 0° C. to the reflux temperature of the reaction mixture, the improvement comprising the hydrogenation of the polymer in the aqueous or latex form.
Claim 10
Dependent Claim
29 words
A process according to claim 7 wherein the unsaturated polymer is selected from the group comprising polyisoprene, polybutadiene, styrene/butadiene copolymers, acrylonitrile/butadiene copolymers, butadiene/isoprene copolymers, isoprene/isobutylene copolymers and natural rubber.
Claim 11
Dependent Claim
21 words
A process according to claim 7 wherein the concentration of polymer in latex form is from 1 to 70% by weight.
Claim 12
Dependent Claim
17 words
A process according to claim 7 wherein the reaction temperature is from 20° C. to 150° C.
Claim 13
Dependent Claim
12 words
A process according to claim 7 wherein the oxidant is hydrogen peroxide.
Claim 14
Dependent Claim
31 words
A process according to claim 7 wherein the metal salt activator is the salt of a metal selected from the group consisting of copper, iron, cobalt, lead, nickel, silver and tin.
Claim 15
Dependent Claim
61 words
A process for hydrogenating carbon-carbon double bonds of an unsaturated polymer which comprises (a) combining the unsaturated polymer in latex form with (a) an oxidant selected from the group consisting of hydroperoxides and (2) a reducing agent selected from hydrazine and hydrates thereof; (b) heating the mixture to a temperature from 0° C. to the reflux temperature of the reaction mixture.
Claim 16
Dependent Claim
61 words
A process for hydrogenating carbon-carbon double bonds of an unsaturated polymer which comprises (a) combining the unsaturated polymer in latex form with (a) an oxidant selected from the group consisting of hydroperoxides and (2) a reducing agent selected from hydrazine and hydrates thereof; (b) heating the mixture to a temperature from 0° C. to the reflux temperature of the reaction mixture.
Claim 17
Dependent Claim
22 words
A process according to claim 13 wherein the concentration of unsaturated polymer in latex form is from 1 to 70% by weight.
Claim 18
Dependent Claim
17 words
A process according to claim 13 wherein the reaction temperature is from 20° C. to 150° C.
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) | 1987-06-05 | 1987-12-05 | 1988-06-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-06-05 | 1991-12-05 | 1992-06-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-06-05 | 1995-12-05 | 1996-06-05 | $7700.00 | Window Closed / Lapsed |