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US4467105A
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Method of preparing glycol esters of organosilanes
Assignee: Dynamit Nobel AG
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Filing: 1982-09-24
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Granted: 1984-08-21
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Expires: 2002-09-24
Abstract
Abstract The present invention relates to a method of preparing dimeric or polymeric organosilane esters whose ester component is at least one glycol moiety and whose silicon atoms are linked together by a glycol moiety. These compounds are known and are used as hydraulic fluids whose preparation involves considerable difficulty. The present invention avoids these difficulties by setting out from organosilane diglycol esters or triglycol esters and transposing them with diglycols or polyglycols. In this transposition the glycol ether corresponding to the glycols is formed and is removed by distillation. The degree of condensation of the organosilane ester products depends on the weight-ratio of the organosilane glycol ester to the diglycols or polyglycols.
Inventors
- 👤 Hans-Joachim Kotzsch
- 👤 Hans-Joachim Vahlensieck
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 22:02
CPC Classifications
C; C08; C08G; C08G65/00; C08G65/02; C08G65/32; C08G65/329; C08G65/336; C07; C07F; C07F7/00; C07F7/02; C07F7/08; C07F7/18; C07F7/1804; C08G77/00; C08G77/60; C10; C10M; C10M2227/00; C10M2227/04; C10N; C10N2040/00; C10N2040/08
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
45 words
A process for the preparation of an organosilane ester of a polyol of the formula ##STR10## wherein R=a glycol substituent of the general formula ##STR11## R'=RO-- or a substituent from group R"; R"=alkyl (C 1 -C 20 ), branched or unbranched, alkenyl, cycloalkyl or aryl;
Claim 2
Dependent Claim
45 words
A process for the preparation of an organosilane ester of a polyol of the formula ##STR10## wherein R=a glycol substituent of the general formula ##STR11## R'=RO-- or a substituent from group R"; R"=alkyl (C 1 -C 20 ), branched or unbranched, alkenyl, cycloalkyl or aryl;
Claim 3
Dependent Claim
88 words
R'"=H or CH 3 ; n=1-12; p=0-10 (average degree of condensation) and branched products thereof when R'=RO--, comprising the steps of mixing silicon esters of the general formula ##STR12## wherein R, R' and R" have the meanings given above with glycols of the general formula ##STR13## in a ratio predetermined by the selected condensation degree p, at temperatures of 20° to 220° C., allowing the resulting reaction mixture to react; and removing, from the reaction mixture, the glycol monoalkyl ethers of the general formula ##STR14## which are formed.
Claim 4
Dependent Claim
88 words
R'"=H or CH 3 ; n=1-12; p=0-10 (average degree of condensation) and branched products thereof when R'=RO--, comprising the steps of mixing silicon esters of the general formula ##STR12## wherein R, R' and R" have the meanings given above with glycols of the general formula ##STR13## in a ratio predetermined by the selected condensation degree p, at temperatures of 20° to 220° C., allowing the resulting reaction mixture to react; and removing, from the reaction mixture, the glycol monoalkyl ethers of the general formula ##STR14## which are formed.
Claim 5
Dependent Claim
23 words
The process of claim 1, wherein the reaction mixture is reacted for up to 12 hours prior to removing the glycol monoalkyl ether.
Claim 6
Dependent Claim
26 words
The process of claim 1 or 2 wherein the reaction mixture is maintained at a temperature between about 90° and 160° C. during the reaction time.
Claim 7
Dependent Claim
17 words
The process of claim 2 wherein the reaction mixture is reacted for about 2 to 4 hours.
Claim 8
Dependent Claim
21 words
The process of claim 1 wherein the reaction mixture is maintained at a temperature of between 90° C. and 220° C.
Claim 9
Dependent Claim
14 words
The process of claim 1 wherein the monoalkyl ethers are removed by fractional distillation.
Claim 10
Dependent Claim
71 words
The process of claim 1 wherein triethylene glycol and 12, 12-dimethyl-2,5,8,11,13,16,19,22-octaoxo-12-silatricosane are mixed together in a molar ratio of approximately 1:2, heated for about 3 hours to a temperature of about 130° C.; and the impurities removed by fractional distillation to leave substantially pure CH 3 O(CH 2 CH 2 O) 3 p Si(CH 3 ) 2 (OCH 2 CH 2 ) 3 OCH 3 wherein p is 1.2 to 1.6.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1987-08-21 | 1988-02-20 | 1988-08-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-08-21 | 1992-02-20 | 1992-08-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-08-21 | 1996-02-20 | 1996-08-21 | $7700.00 | Window Closed / Lapsed |