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Patent US3691222A successfully refreshed from Google Patents.
US3691222A
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Method of preparing silyl alcohols
Assignee: Dow Silicones Corp
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Filing: 1971-02-26
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Granted: 1972-09-12
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Expires: 1991-02-26
Abstract
Abstract Silyl alcohols are prepared by reacting alkylene oxides (such as ethylene oxide) with alkoxysilanes or siloxanes containing the group *SiRSH in an alcohol promoter and optionally in the presence of acid or base catalysts such as toluene sulfonic acid, zinc chloride or triethylamine. The product has the group *SiRSCH(R'')CH(R'')OH.
Inventors
- 👤 Samuel R Wendel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 14:09
CPC Classifications
C; C07; C07F; C07F7/00; C07F7/02; C07F7/08; C07F7/0834; C07F7/0838; C07F7/0872; C07F7/0889; C07F7/0803; C08; C08G; C08G63/00; C08G63/68; C08G77/00; C08G77/04; C08G77/22; C08G77/26; C08G77/28; C08G77/38; C08G77/382; C08G77/392; H; H10; H10W; H10W40/00; H10W40/70; H10W40/73
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
24 words
The process of claim 1 in which the reaction is carried out in the presence of an acid or basic catalyst in catalytic amount.
Claim 2
Dependent Claim
51 words
*SiRSCH(R'')CH(R'')OH in which R is a divalent hydrocarbon radical free of aliphatic unsaturation, R'' is hydrogen, a lower alkyl or a lower haloalkyl radical, the remaining valences of the silicon in (1) and (2) being satisfied by alkoxy radicals, oxygen atoms of SiOSi-, linkages, monovalent hydrocarbon radicals or monovalent halohydrocarbon radicals.
Claim 3
Dependent Claim
13 words
The process in accordance with claim 1 in which (1) is a methylsiloxane.
Claim 4
Dependent Claim
13 words
The process in accordance with claim 2 in which (1) is a methylsiloxane.
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) | 1975-09-12 | 1976-03-13 | 1976-09-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-09-12 | 1980-03-13 | 1980-09-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-09-12 | 1984-03-13 | 1984-09-12 | $7700.00 | Window Closed / Lapsed |