US3960913A
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Halogenated alkoxysilane intermediate compounds and their preparation
Assignee: Olin Corp
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Filing: 1975-09-24
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Granted: 1976-06-01
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Expires: 1995-09-24
Abstract
Abstract Halogenated alkoxysilane intermediate compounds are described having the formula RSi[OSi(OR') 3 ] 2 X wherein X is a halogen, R is hydrogen, an alkyl, alkenyl, aryl or aralkyl group and each R' is independently selected from the same group as R with the proviso that at least a majority of R' radicals are sterically hindered alkyl groups having at least 3 carbon atoms. The preparation of these compounds is also described.
Inventors
- 👤 Karl O. Knollmueller
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 14:23
CPC Classifications
C; C07; C07F; C07F7/00; C07F7/02; C07F7/08; C07F7/18; C07F7/1804; C07F7/0834; C07F7/0838
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
54 words
A compound of the formula: ##EQU4## wherein X is a halogen, R is hydrogen, an alkyl, alkenyl, aryl or aralkyl, and each R' is independently selected from the same group as R with the proviso that at least a majority of R' radicals are sterically hindered alkyl groups having at least 3 carbon atoms.
Claim 2
Dependent Claim
54 words
A compound of the formula: ##EQU4## wherein X is a halogen, R is hydrogen, an alkyl, alkenyl, aryl or aralkyl, and each R' is independently selected from the same group as R with the proviso that at least a majority of R' radicals are sterically hindered alkyl groups having at least 3 carbon atoms.
Claim 3
Dependent Claim
52 words
The compound of claim 1 wherein R is hydrogen, an alkyl or alkenyl having about 1 to about 18 carbon atoms or an aryl or aralkyl having about 6 to about 24 carbon atoms and wherein each R' is independently selected from the same group as R, subject to the above proviso.
Claim 4
Dependent Claim
34 words
The compound of claim 2 wherein X is F, Cl, Br or I and wherein a majority of the R' radicals are sterically hindered alkyl groups having about 3 to about 24 carbon atoms.
Claim 5
Dependent Claim
50 words
The compound of claim 1 wherein R is hydrogen, an alkyl having about 1 to about 8 carbon atoms, or an aryl or aralkyl having about 6 to about 14 carbon atoms and wherein each R' is independently selected from the same group as R, subject to the above proviso.
Claim 6
Dependent Claim
33 words
The compound of claim 4 wherein X is Cl, Br or I and wherein a majority of the R' radicals are sterically hindered alkyl groups having about 4 to about 12 carbon atoms.
Claim 7
Dependent Claim
25 words
The compound of claim 1 wherein a majority of the R' radicals are sterically hindered alkyl groups having about 3 to about 24 carbon atoms.
Claim 8
Dependent Claim
30 words
The compound of claim 6 wherein X is Cl and wherein a majority of the R' radicals are sterically hindered alkyl groups having about 4 to about 12 carbon atoms.
Claim 9
Dependent Claim
109 words
A method of preparing the compound of claim 1 comprising: reacting a trihalosilane of the formula: R--SiX.sub.3 wherein X and R are defined in claim 1 above; with about 1.5 to about 4 moles of a trialkoxysilanol per mole of trihalosilane, said trialkoxysilanol having the formula: HOSi(OR').sub.3 wherein R' is defined in claim 1 above; in the presence of about 1.5 to about 4 moles of a hydrogen halide acceptor base compound, per mole of trihalosilane to produce a reaction mixture containing the compound of claim 1; said reaction being carried out at about -30°C to about the reflux temperature of the lowest boiling constituent in the reaction mixture.
Claim 10
Dependent Claim
13 words
The method of claim 8 wherein X is F, Cl, Br or I.
Claim 11
Dependent Claim
79 words
The method of claim 8 wherein X is Cl, Br or I, wherein R is hydrogen, an alkyl or alkenyl having about 1 to about 18 carbon atoms or an aryl or aralkyl having about 6 to about 24 carbon atoms and wherein each R' is independently selected from the same group as R with the proviso that at least a majority of the R' radicals are sterically hindered alkyl groups having about 3 to about 24 carbon atoms.
Claim 12
Dependent Claim
50 words
The method of claim 10 wherein R is hydrogen, an alkyl having about 1 to about 8 carbon atoms or an aryl or aralkyl having about 6 to about 14 carbon atoms and wherein each R' is independently selected from the same group as R, subject to the above proviso.
Claim 13
Dependent Claim
30 words
The method of claim 10 wherein X is Cl and wherein a majority of the R' radicals are sterically hindered alkyl groups having about 4 to about 12 carbon atoms.
Claim 14
Dependent Claim
21 words
The method of claim 10 wherein about 3 to about 6 moles of the trialkoxysilanol is used per mole of trihalosilane.
Claim 15
Dependent Claim
25 words
The method of claim 13 wherein about 3 to about 6 moles of the hydrogen halide acceptor base compound is used per mole of trihalosilane.
Claim 16
Dependent Claim
15 words
The method of claim 14 wherein said reaction is carried out at 0°C to 100°C.
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) | 1979-06-01 | 1979-12-01 | 1980-06-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-06-01 | 1983-12-01 | 1984-06-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-06-01 | 1987-12-01 | 1988-06-01 | $7700.00 | Window Closed / Lapsed |