US3700757A
Expired / Lapsed
US
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Process for the preparation of gel-containing synthetic conjugated diene solution polymers
Assignee: Shell USA Inc
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Filing: 1971-06-30
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Granted: 1972-10-24
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Expires: 1991-06-30
Abstract
Abstract Conjugated diene solution rubber compositions having improved green strength combined with satisfactory processability are obtained by treatment of a solution diene rubber, in aqueous dispersion, with a redox hydroperoxide system to produce a composition having 5-60 weight percent toluene-insoluble gel.
Inventors
- 👤 Gerardus E La Heij
- 👤 Gerrit J Van Amerongen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 15:10
CPC Classifications
C; C08; C08C; C08C19/00; Y; Y10; Y10S; Y10S526/00; Y10S526/915
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
18 words
A process acCording to claim 1, in which (B) is a solution of an unoxidized conjugated diene polymer.
Claim 2
Dependent Claim
36 words
A process according to claim 1 in which the conjugated diene polymer in solution or dispersion (B) is identical to the polymer in aqueous dispersion (A) prior to modification thereof by treatment with the redox system.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-10-24 | 1976-04-24 | 1976-10-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-10-24 | 1980-04-24 | 1980-10-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-10-24 | 1984-04-24 | 1984-10-24 | $7700.00 | Window Closed / Lapsed |