Patent US3288741A successfully refreshed from Google Patents.
US3288741A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Glycol and acid salt treatment for increasing the particle size of synthetic rubber latex
Assignee: Goodrich Corp
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Filing: 1963-08-30
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Granted: 1966-11-29
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Expires: 1983-08-30
Abstract
No abstract record available.
Inventors
- 👤 Shang-I Cheng
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 22:49
CPC Classifications
C; C08; C08C; C08C1/00; C08C1/02; C08C1/065; C08C1/07
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
177 words
THE METHOD OF INCREASING THE SIZE OF THE POLYMER PARTICLES OF A SYNTHETIC RUBBER LATEX COMPRISING THE AQUEOUS EMULSION POLYMERIZATE OF 55 TO 100 WT. PERCENT OF A 1,3-BUTADIENE HAVING 4 TO 6 CARBON ATOMS AND 0 TO 45 WT. PERCENT OF A COMPOUND COPOLYMERIZABLE WITH SAID 1,3BUTADIENE AND SELECTED FROM THE GROUP CONSISTING OF ARYL OLEFINS, ACRYLONITRILE AND METHACRYLONITRILE, WHEREBY THE AVERAGE SIZE OF THE POLYMER PARTICLES IN THE LATEX IS INCREASED BY AT LEAST ABOUT 40% AND THE AMOUNT OF NEW COAGULUM FORMED THEREIN IS LESS THAN ABOUT 5% BASED ON THE WEIGHT OF THE RUBBER IN THE LATEX, WHICH METHOD COMPRISES FIRST MIXING WITH THE LATEX (A) AT LEAST 0.05 PART OF A POLYALKYLENE GLYCOL HAVING AN AVERAGED MOLECULAR WEIGHT OF FROM ABOUT 300 TO ABOUT 7500 AND SELECTED FROM THE GROUP CONSISTING OF POLYETHLENE GLYCOL, POLYPROPYLENE GLYCOL, POLYBUTYLENE GLYCOL, POLYEPICHLOROHYDRIN GLYCOL AND MIXTURES THEREOF, AND THEN MIXING WITH THE LATEX (B) FROM ABOUT 1 TO 10 PARTS BY WEIGHT OF AN AMMONIUM SALT OF A CARBOXYLIC ACID SELECTED FROM THE GROUP CONSISTING OF:
Claim 2
Independent Claim
177 words
THE METHOD OF INCREASING THE SIZE OF THE POLYMER PARTICLES OF A SYNTHETIC RUBBER LATEX COMPRISING THE AQUEOUS EMULSION POLYMERIZATE OF 55 TO 100 WT. PERCENT OF A 1,3-BUTADIENE HAVING 4 TO 6 CARBON ATOMS AND 0 TO 45 WT. PERCENT OF A COMPOUND COPOLYMERIZABLE WITH SAID 1,3BUTADIENE AND SELECTED FROM THE GROUP CONSISTING OF ARYL OLEFINS, ACRYLONITRILE AND METHACRYLONITRILE, WHEREBY THE AVERAGE SIZE OF THE POLYMER PARTICLES IN THE LATEX IS INCREASED BY AT LEAST ABOUT 40% AND THE AMOUNT OF NEW COAGULUM FORMED THEREIN IS LESS THAN ABOUT 5% BASED ON THE WEIGHT OF THE RUBBER IN THE LATEX, WHICH METHOD COMPRISES FIRST MIXING WITH THE LATEX (A) AT LEAST 0.05 PART OF A POLYALKYLENE GLYCOL HAVING AN AVERAGED MOLECULAR WEIGHT OF FROM ABOUT 300 TO ABOUT 7500 AND SELECTED FROM THE GROUP CONSISTING OF POLYETHLENE GLYCOL, POLYPROPYLENE GLYCOL, POLYBUTYLENE GLYCOL, POLYEPICHLOROHYDRIN GLYCOL AND MIXTURES THEREOF, AND THEN MIXING WITH THE LATEX (B) FROM ABOUT 1 TO 10 PARTS BY WEIGHT OF AN AMMONIUM SALT OF A CARBOXYLIC ACID SELECTED FROM THE GROUP CONSISTING OF:
References Cited (Backward Citations)
US2444801A
Cited
US2797203A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-11-28 | 1970-05-30 | 1970-11-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-11-28 | 1974-05-30 | 1974-11-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-11-28 | 1978-05-30 | 1978-11-29 | $7700.00 | Window Closed / Lapsed |