Patent US4173576A successfully refreshed from Google Patents.
US4173576A
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Process for the esterification of chlorosilanes
Assignee: Dynamit Nobel AG
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Filing: 1978-02-28
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Granted: 1979-11-06
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Expires: 1998-02-28
Abstract
Abstract An improvement in the process for the esterification of chlorosilanes with alcohols wherein the esterification is carried out in the presence of a chlorohydrocarbon and in the absence of an acid binding agent.
Inventors
- 👤 Claus-Dieter Seiler
- 👤 Hans-Joachim Vahlensieck
- 👤 Hans-Joachim Kotzsch
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 21:19
CPC Classifications
C; C07; C07F; C07F7/00; C07F7/02; C07F7/08; C07F7/18; C07F7/1804
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
76 words
In a process for the preparation of an alkoxysilane by the esterification of a chlorosilane with an alcohol of the formula R'OH where R' is an alkyl group of 1 to 11 carbon atoms, the improvement which comprises carrying out the process in the presence of a chlorinated hydrocarbon present in the reaction mixture in an amount of 0.5 to 4 times that of solid halogen silane and in the absence of an acid binding agent.
Claim 2
Dependent Claim
76 words
In a process for the preparation of an alkoxysilane by the esterification of a chlorosilane with an alcohol of the formula R'OH where R' is an alkyl group of 1 to 11 carbon atoms, the improvement which comprises carrying out the process in the presence of a chlorinated hydrocarbon present in the reaction mixture in an amount of 0.5 to 4 times that of solid halogen silane and in the absence of an acid binding agent.
Claim 3
Dependent Claim
30 words
A process according to claim 1 wherein the chlorinated hydrocarbon is present in the reaction mixture in an amount from 0.5 to three times that of the halogen silane charged.
Claim 4
Dependent Claim
17 words
A process according to claim 1 wherein the alcohol is a primary alcohol, secondary alcohol or phenol.
Claim 5
Dependent Claim
30 words
A process according to claim 2 wherein the chlorinated hydrocarbon is present in the reaction mixture in an amount of between 0.1 and 2 that of the halogen silane charged.
Claim 6
Dependent Claim
18 words
A process according to claim 1 wherein the hydrogen silane has the formula R m SiCl 4-m .
Claim 7
Dependent Claim
56 words
A process according to claim 5 wherein the hydrogen silane is selected from the group consisting of trichlorosilane, tetrachlorosilane, methyldichlorosilane, trimethyldichlorosilane, methyltrichlorosilane, ethyltrichlorosilane, ethyldichlorosilane, n-propyldichlorosilane, propyltrichlorosilane, isobutyldichlorosilane, vinyldichlorosilane, vinyltrichlorosilane, vinylmethyldichlorosilane, dimethyldichlorosilane, propenyltrichlorosilane, allyltrichlorosilane, 3-chloropropyltrichlorosilane, phenyltrichlorosilane, chloropropyltrichlorosilane, chloroethyltrichlorosilane, methylchloroethyltrichlorosilane, CF 3 CH 2 SiCl 3 and CF 3 --CH 2 --O--(CH 2 ) 3 --SiCl 3 .
Claim 8
Dependent Claim
29 words
A process according to claim 1 wherein said chlorinated hydrocarbon is selected from the group consisting of carbon tetrachloride, chloroform, methylene chloride, dichloroethane, dichloroethylene, 1,1,1-trichloroethane, trichloroethylene, perchloroethylene and tetrachloroethane.
Claim 9
Dependent Claim
12 words
A process according to claim 7 wherein the chlorinated hydrocarbon is trichloroethane.
Claim 10
Dependent Claim
13 words
A process according to claim 7 wherein the chlorinated hydrocarbon is carbon tetrachloride.
Claim 11
Dependent Claim
12 words
A process according to claim 7 wherein the chlorinated hydrocarbon is tetrachloroethylene.
Claim 12
Dependent Claim
12 words
A process according to claim 7 wherein the chlorinated hydrocarbon is tetrachloroethane.
Claim 13
Dependent Claim
12 words
A process according to claim 1 wherein the alcohol is benzyl alcohol.
References Cited (Backward Citations)
US3008975A
Cited
US3985781A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1982-11-05 | 1983-05-07 | 1983-11-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-11-05 | 1987-05-07 | 1987-11-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-11-05 | 1991-05-07 | 1991-11-06 | $7700.00 | Window Closed / Lapsed |