US5162478A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Poly(silylene)vinylenes from ethynylhydridosilanes
Assignee: Iowa State University Research Foundation Inc
•
Filing: 1990-09-17
•
Granted: 1992-11-10
•
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 15:17
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
Cited
JPS58206611A
Cited
GB2135319A
Cited
JPS59155409A
Cited
JPS59210915A
Cited
US4667006A
Cited
JPS60208308A
Cited
JPS61113605A
Cited
JPS61118411A
Cited
JPS61247714A
Cited
US4940767A
Cited
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 |