US5068387A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of organofunctional alkoxysilanes
Assignee: Dow Silicones Corp
•
Filing: 1989-12-01
•
Granted: 1991-11-26
•
Expires: 2009-12-01
Abstract
Abstract The present invention relates to a process for the production of mixtures of novel organofunctional alkoxysilanes by the reaction of mixtures of certain substituted organic halides and chlorosilanes with molten sodium dispersed in alkoxysilanes. In the described process, the substituted organic groups of the organic halide replace alkoxy groups of the alkoxysilanes. Also claimed, are organofunctional alkoxysilanes prepared by the claimed process.
Inventors
- 👤 Don L. Kleyer
- 👤 John L. Speier
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 22:25
CPC Classifications
C; C07; C07F; C07F7/00; C07F7/02; C07F7/08; C07F7/18; C07F7/1804; C07F7/1872; C07F7/1892; C07F7/1876; C07F7/188
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
133 words
An organofunctional alkoxysilane of formula R.sup.1.sub.a R.sup.2.sub.b (AR).sub.n Si(OR.sup.3).sub.4-a-b-n ; where R 1 and R 2 are independently selected from the group consisting of alkyl, aryl, and AR radicals; R 3 is an alkyl of 1 to 7 carbon atoms; A is a substituent on an organic group, R, said A selected from the group consisting of R 4 O--, C z F 2z+1 --, and alkenyl radicals; R 4 and R 5 are independently selected from the group consisting of alkyl, aryl, and triorganosilyl radicals; z is 1 to 4; R is a divalent radical of the structure --R 6 (CH 2 ) m --, R 6 is selected from a group consisting of aliphatic and aromatic divalent radicals; m=0 to 6; n=2 or 3; a+b+n=2 or 3; and a+b=0 or 1.
Claim 2
Dependent Claim
133 words
An organofunctional alkoxysilane of formula R.sup.1.sub.a R.sup.2.sub.b (AR).sub.n Si(OR.sup.3).sub.4-a-b-n ; where R 1 and R 2 are independently selected from the group consisting of alkyl, aryl, and AR radicals; R 3 is an alkyl of 1 to 7 carbon atoms; A is a substituent on an organic group, R, said A selected from the group consisting of R 4 O--, C z F 2z+1 --, and alkenyl radicals; R 4 and R 5 are independently selected from the group consisting of alkyl, aryl, and triorganosilyl radicals; z is 1 to 4; R is a divalent radical of the structure --R 6 (CH 2 ) m --, R 6 is selected from a group consisting of aliphatic and aromatic divalent radicals; m=0 to 6; n=2 or 3; a+b+n=2 or 3; and a+b=0 or 1.
Claim 3
Dependent Claim
20 words
The organofunctional alkoxysilane of claim 1, where R 3 is selected from the group consisting of methyl and ethyl radicals.
Claim 4
Dependent Claim
29 words
The organofunctional alkoxysilane of claim 2, where R 6 is selected from the group consisting of --CH 2 --, --CH 2 CH 2 --, and phenyl bi-radical, and m=0.
Claim 5
Dependent Claim
21 words
The organofunctional alkoxysilane of claim 3 where substituent A is selected from the group consisting of vinyl, vinylphenyl, and 1-methylethenylphenyl radicals.
Claim 6
Dependent Claim
15 words
The organofunctional alkoxysilane of claim 3, where substituent A is the R 4 O-- radical.
Claim 7
Dependent Claim
17 words
The organofunctional alkoxysilane of claim 3, where substituent A is the C z F 2z+1 -- radical.
Claim 8
Dependent Claim
16 words
The organofunctional alkoxysilane of claim 3, where the C z F 2z+1 -- radical is trifluoromethyl.
References Cited (Backward Citations)
CA598444A
Cited
GB573906A
Cited
US2521267A
Cited
GB668532A
Cited
US2985678A
Cited
US4683321A
Cited
US4888436A
Cited
US4897501A
Cited
US4921988A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1994-11-25 | 1995-05-27 | 1995-11-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-11-25 | 1999-05-27 | 1999-11-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-11-25 | 2003-05-27 | 2003-11-26 | $7700.00 | Window Closed / Lapsed |