US3018270A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for producing silicone resins
Assignee: Union Carbide Corp
•
Filing: 1960-07-28
•
Granted: 1962-01-23
•
Expires: 1980-07-28
Abstract
No abstract record available.
Inventors
- 👤 John B Toogood
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 19:38
CPC Classifications
C; C08; C08G; C08G77/00; C08G77/04; C08G77/14; C08G77/16
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
170 words
THE METHOD FOR PREPARING A SILICONE RESIN OF A PREDETERMINED HYDROXYL CONTENT WHICH COMPRISES HYDROLYZING AND CONDENSING AT LEAST ONE SILANE HAVING MONOVALENT HYDROCARBON AND READILY-HYDROLYZABLE RADICALS ATTACHED TO THE SILICON ATOM THEREOF TO A PARTIALLY CONDENSED HYDROXYL-CONTAINING SILICONE HYDROLYZATE CONTAINING A RATIO OF MONOVALENT HYDROCARBON RADICALS TO SILICON ATOMS OF FROM ABOUT 1.0 TO ABOUT 1.7, SUFFICIENT WATER BEING EMPLOYED IN THE HYDROLYSIS TO HYDROLYZE ALL THE READILY-HYDROLYZABLE RADICALS, AND HEATING A SOLUTION OF SAID HYDROLYZATE IN AN INERT SOLVENT IN THE PRESENCE OF WATER, SAID WATER BEING PRESENT IN AN AMOUNT OF FROM ABOUT 1/11 TO ABOUT 1/4 OF THE WEIGHT OF HYDROLYZATE PRESENT, TO A TEMPERATURE OF FROM AT LEAST ABOUT 150*C. TO ABOUT 300* C. UNDER A PRESSURE OF FROM AT LEAST ABOUT 400 P.S.I. TO ABOUT 20,000 P.S.I., IN ORDER TO SIMULTANEOUSLY CONDENSE THE SILANOL GROUPS OF SAID HYDROLYZATE TO FORM SI-O-SI BONDS AND HYDROLYTICALLY CLEAVE THE SI-O-SI BONDS OF SAID HYDROLYZATE TO FORM SI-OH BONDS, SAID HEATING BEING CONTINUED UNTIL EQUILIBRIUM HAS BEEN ATTAINED.
Claim 2
Independent Claim
170 words
THE METHOD FOR PREPARING A SILICONE RESIN OF A PREDETERMINED HYDROXYL CONTENT WHICH COMPRISES HYDROLYZING AND CONDENSING AT LEAST ONE SILANE HAVING MONOVALENT HYDROCARBON AND READILY-HYDROLYZABLE RADICALS ATTACHED TO THE SILICON ATOM THEREOF TO A PARTIALLY CONDENSED HYDROXYL-CONTAINING SILICONE HYDROLYZATE CONTAINING A RATIO OF MONOVALENT HYDROCARBON RADICALS TO SILICON ATOMS OF FROM ABOUT 1.0 TO ABOUT 1.7, SUFFICIENT WATER BEING EMPLOYED IN THE HYDROLYSIS TO HYDROLYZE ALL THE READILY-HYDROLYZABLE RADICALS, AND HEATING A SOLUTION OF SAID HYDROLYZATE IN AN INERT SOLVENT IN THE PRESENCE OF WATER, SAID WATER BEING PRESENT IN AN AMOUNT OF FROM ABOUT 1/11 TO ABOUT 1/4 OF THE WEIGHT OF HYDROLYZATE PRESENT, TO A TEMPERATURE OF FROM AT LEAST ABOUT 150*C. TO ABOUT 300* C. UNDER A PRESSURE OF FROM AT LEAST ABOUT 400 P.S.I. TO ABOUT 20,000 P.S.I., IN ORDER TO SIMULTANEOUSLY CONDENSE THE SILANOL GROUPS OF SAID HYDROLYZATE TO FORM SI-O-SI BONDS AND HYDROLYTICALLY CLEAVE THE SI-O-SI BONDS OF SAID HYDROLYZATE TO FORM SI-OH BONDS, SAID HEATING BEING CONTINUED UNTIL EQUILIBRIUM HAS BEEN ATTAINED.
References Cited (Backward Citations)
US2507200A
Cited
US2483209A
Cited
US2568384A
Cited
US2607792A
Cited
US2679495A
Cited
US2779776A
Cited
US2863897A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-01-22 | 1965-07-24 | 1966-01-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-01-22 | 1969-07-24 | 1970-01-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-01-22 | 1973-07-24 | 1974-01-23 | $7700.00 | Window Closed / Lapsed |