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US5175332A
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Cycloalkoxysilanes
Assignee: Dow Silicones Corp
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Filing: 1991-12-16
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Granted: 1992-12-29
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Expires: 2011-12-16
Abstract
Abstract A cycloalkoxysilane, having utility as an electron donor in the Ziegler-Natta polymerization of olefinic monomers, of the structure (R'O).sub.x (R').sub.y Si(OR).sub.4-x-y wherein R is independently selected from the group consisting of alkyl radicals having 1 to 5 carbon atoms and acyl radicals having 2 to 5 carbon atoms, R' is independently selected from the group consisting of a cyclopentyl radical, a cyclohexyl radical a cycloheptyl radical, and substituted radicals thereof, x is 1, 2, 3 or 4 and y is 0, 1 or 2.
Inventors
- 👤 Wayne J. Chatterton
- 👤 Sean P. Davern
- 👤 Carl A. Fairbank
- 👤 Terrence K. Hilty
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 22:03
CPC Classifications
C; C07; C07F; C07F7/00; C07F7/02; C07F7/04; C07F7/08; C07F7/18; C07F7/1804
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
71 words
A cycloalkoxysilane having the structure (R'O).sub.x (R').sub.y Si(OR).sub.4-x-y wherein R is independently selected from the group consisting of alkyl radicals having 1 to 5 carbon atoms and acyl radicals having 2 to 5 carbon atoms. R' is independently selected from the group consisting of a cyclopentyl radical, a cyclohexyl radical a cycloheptyl radical, and substituted radicals thereof, x is 1, 2, 3 or 4 and y is 0, 1 or 2.
Claim 2
Dependent Claim
71 words
A cycloalkoxysilane having the structure (R'O).sub.x (R').sub.y Si(OR).sub.4-x-y wherein R is independently selected from the group consisting of alkyl radicals having 1 to 5 carbon atoms and acyl radicals having 2 to 5 carbon atoms. R' is independently selected from the group consisting of a cyclopentyl radical, a cyclohexyl radical a cycloheptyl radical, and substituted radicals thereof, x is 1, 2, 3 or 4 and y is 0, 1 or 2.
Claim 3
Dependent Claim
19 words
The cycloalkoxysilane of claim 1, wherein R is selected from the group consisting of methyl, ethyl and propyl radicals.
Claim 4
Dependent Claim
7 words
The cycloalkoxysilane of claim 2, wherein y=0.
Claim 5
Dependent Claim
24 words
The cycloalkoxysilane of claim 3, wherein R' is selected from the group consisting of a cyclopentyl radical, a cyclohexyl radical and a cycloheptyl radical.
Claim 6
Dependent Claim
17 words
The cycloalkoxysilane of claim 4, wherein R' is a cyclopentyl radical and x is 1 or 2.
Claim 7
Dependent Claim
11 words
The cycloalkoxysilane of claim 5, wherein R is a methyl radical.
Claim 8
Dependent Claim
7 words
The cycloalkoxysilane of claim 2, wherein y=1.
Claim 9
Dependent Claim
24 words
The cycloalkoxysilane of claim 7, wherein R' is selected from the group consisting of a cyclopentyl radical, a cyclohexyl radical and a cycloheptyl radical.
Claim 10
Dependent Claim
17 words
The cycloalkoxysilane of claim 8, wherein R' is a cyclopentyl radical and x is 1 or 2.
Claim 11
Dependent Claim
11 words
The cycloalkoxysilane of claim 9, wherein R is a methyl radical.
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) | 1995-12-29 | 1996-06-29 | 1996-12-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-12-29 | 2000-06-29 | 2000-12-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-12-29 | 2004-06-29 | 2004-12-29 | $7700.00 | Window Closed / Lapsed |