US5162478A
Expired / Lapsed
US
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Poly(silylene)vinylenes from ethynylhydridosilanes
Assignee: Iowa State University Research Foundation Inc
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Filing: 1990-09-17
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Granted: 1992-11-10
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Expires: 2010-09-17
Abstract
Abstract Catalytic polymerization of dialkyl-, alkylaryl- or diaryldiethynylhydridosilanes cleanly affords soluble poly(silylene)vinylenes which can be shaped as fibers, films and bulk objects and thermally converted to silicon carbide.
Inventors
- 👤 Thomas J. Barton
- 👤 Sina Ijadi-Maghsoodi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 09:32
CPC Classifications
C; C08; C08G; C08G77/00; C08G77/60; C04; C04B; C04B35/00; C04B35/515; C04B35/56; C04B35/565; C04B35/571
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
74 words
A method of preparing polymeric ethynylhydrisilanes, comprising: Polymerizing an ethynylhydridosilane of the formula: ##STR7## in the presence of an effective amount of hydrosilation catalyst, wherein R and R' are organic moieties selected from the group consisting of C 1 to C 20 alkyl, C 6 to C 20 aryl, and C 7 and C 20 alkylaryl to yield a poly(silylene)vinylene of the formula ##STR8## wherein "n" is an integer of from 20 to 500.
Claim 2
Independent Claim
74 words
A method of preparing polymeric ethynylhydrisilanes, comprising: Polymerizing an ethynylhydridosilane of the formula: ##STR7## in the presence of an effective amount of hydrosilation catalyst, wherein R and R' are organic moieties selected from the group consisting of C 1 to C 20 alkyl, C 6 to C 20 aryl, and C 7 and C 20 alkylaryl to yield a poly(silylene)vinylene of the formula ##STR8## wherein "n" is an integer of from 20 to 500.
Claim 3
Dependent Claim
12 words
The method of claim 1 wherein R and R' are the same.
Claim 4
Dependent Claim
11 words
The method of claim 1 wherein R and R' are different.
Claim 5
Dependent Claim
19 words
The method of claim 1 wherein the reaction is run in the presence of a reaction promoting organic solvent.
Claim 6
Dependent Claim
20 words
The method of claim 4 wherein the reaction solvent is selected from the group consisting of aliphatic and aromatic hydrocarbons.
Claim 7
Dependent Claim
21 words
The method of claim 5 wherein the reaction solvent is selected from the group consisting of tetrahydrofuran, diethylether, benzene and hexane.
Claim 8
Dependent Claim
13 words
The process of claim 1 wherein the catalyst is a noble metal catalyst.
Claim 9
Dependent Claim
12 words
The process of claim 7 wherein the catalyst is a platinum catalyst.
Claim 10
Dependent Claim
11 words
The process of claim 8 wherein the catalyst is chloroplatinic acid.
References Cited (Backward Citations)
SU480731A1
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JPS58206611A
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GB2135319A
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JPS59155409A
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US4667006A
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US4940767A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1995-11-10 | 1996-05-11 | 1996-11-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-11-10 | 2000-05-11 | 2000-11-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-11-10 | 2004-05-11 | 2004-11-10 | $7700.00 | Window Closed / Lapsed |