Silicone resin useful in molding compositions
Abstract
Abstract A SILICONE RESIN COMPOSITION HAVING IMPROVED FLEXURAL STRENGTH AND THERMAL SHOCK PROPERTIES COMPRISING A RESINOUS TERPOLYMER COMPOUND HAVING RSIO3/2 UNITS R2SIO UNITS AND -(O-SI(-R)2)N-O- UNITS WHERE THE R TO SI RATIO IS 1.05 TO 1.99. THE R RADICAL REPRESENTS MONOVALENT HYDROCARBON RADICALS, HALOGENATED MONOVALENT HYDROCARBON RADICALS WHERE THE R RADICALS IN A PARTICULAR UNIT ARE DIFFERENT WHICH RESIN CONTAINS A TOTAL ALKOXY AND SILANOL CONTENT FROM 2% TO 8% BY WEIGHT AND WHREIN THE R RADICAL IN EACH UNIT HAS AT LEAST 10 MOLE PERCENT ARYL RADICALS. A SILICONE MOLDING COMPOSITION MAY BE PREPARED CONTAINING 5 TO 100% OF THE ABOVE RESIN AND 0 TO 95% BY WEIGHT OF ANY WELL KNOWN SILICONE RESIN.
Inventors
- 👤 J Zdaniewski
Bibliographic Details
Claims Analysis
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-02-11 | 1977-08-13 | 1978-02-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-02-11 | 1981-08-13 | 1982-02-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-02-11 | 1985-08-13 | 1986-02-12 | $7700.00 | Window Closed / Lapsed |