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US3720699A
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Acyloxy endblocked 3-ypsilon-acylamidopropyl or 3-ypsilon-haloacylamidopropyl trisiloxanes and process
Assignee: Sierracin Corp
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Filing: 1969-11-19
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Granted: 1973-03-13
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Expires: 1989-11-19
Abstract
Abstract PROTECTIVE CROSS-LINKED POLYSILOXANE COATINGS FOR NORMALLY VULNERABLE SUBSTRATES ARE PREPARED BY CURING LINEAR POLYSILOZANE POLYMERS COMPRISED OF THE HYDROLYSIS-CONDENSATION REACTION PRODUCT OF A SILOXANE HAVING THE FORMULA X1-SI(-Y1)(-Y2)-O-SI(-Z)(-Z'')-O-SI(-Y3)(-Y4)-X2 WHEREIN X1 AND X2 ARE ACYLOXY AND Y1-4, Z AND Z'' ARE INDEPENDENTLY SELECTED FROM THE GROUP CONSISTING OF HYDROGEN, C1-C4 ALKYL, C1-C4 ALKOXY, PHENYL, C7-C10 ALKYLPHENYLOXY, PHENYLOXY AND -R-N(-R1)-CO-R2 E.G., GAMMA-ACETAMIDOPROPYL. THE SILOXANE CAN BE PREPARED, E.G., BY REACTING TWO MOLAR PROPORTIONS OF A DIACYLOXY SILANE WITH ABOUT ONE MOLAR PORPORTION OF A DI-, TRI-, OR TETRA-ALKOXY SILANE.
Inventors
- 👤 D Stoddard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 21:25
CPC Classifications
C; C07; C07F; C07F7/00; C07F7/02; C07F7/08; C07F7/0896; C07F7/18; C07F7/1896; C08; C08G; C08G77/00; C08G77/04; C08G77/14; C08G77/22; C08G77/26
Claims Analysis
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References Cited (Backward Citations)
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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) | 1976-03-12 | 1976-09-11 | 1977-03-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-03-12 | 1980-09-11 | 1981-03-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-03-12 | 1984-09-11 | 1985-03-13 | $7700.00 | Window Closed / Lapsed |