US5036145A
Expired / Lapsed
US
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Alkoxysilane and alkoxysilane terminated polyamic or polyimide lacquer composition
Assignee: Armstrong World Industries Inc
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Filing: 1989-07-10
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Granted: 1991-07-30
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Expires: 2009-07-10
Abstract
Abstract An alkoxysilane bearing amic acid or derivative thereof is formed by reacting an aromatic or aliphatic dianhydride and an aminoalkyltrialkoxysilane or aminoaryltrialkoxysilane, or reacting an aromatic or aliphatic dianhydride and a diamine to form an amic acid which is reacted with an aminoalkylenetrialkoxysilane. A thin, hard protective silica glass network is formed by reacting the alkoxysilane bearing amic acid with an alkoxysilane, preferably tetraalkoxysilane, and an epoxy bearing silane coupling agnet in an acid catalyzed sol-gel process involving hydrolysis and condensation, which provides an amide/ester modified silica network. In a variation of this process, a polyamic acid bearing anhydride termination is prepared by reacting an excess of a dianhydride with a diamine. The product of this reaction when reacted with an aminoalkylenetrialkoxysilane provides an alkoxysilane bearing oligomeric polyamic acid. The latter product yields an imide modified silica network when subjected to acid catalyzed hydrolysis and condensation with tetraalkoxysilane.
Inventors
- 👤 Garry K. Echterling
- 👤 John E. Herweh
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 15:51
CPC Classifications
C; C08; C08G; C08G73/00; C08G73/06; C08G73/10; C08G73/1057; C08G73/106; C08G73/1003; C08G73/1007; C08G77/00; C08G77/48; C08G77/54; C09; C09D; C09D183/00; C09D183/14
Claims Analysis
Total Claims: 21
Claim 1
Independent Claim
57 words
A lacquer composition comprising an amic acid, an alkoxysilane and a silane coupling agent, said amic acid being the reaction product of an aromatic or aliphatic dianhydride and an aminoalkyltrialkoxysilane or aminoaryltrialkoxysilane, said alkoxysilane being a tetra(C 1 -C 3 )alkoxysilane, and said silane coupling agent being a glycidoxy(C 2 -C 4 )alkyltri(C 1 -C 2 )alkoxysilane.
Claim 2
Dependent Claim
57 words
A lacquer composition comprising an amic acid, an alkoxysilane and a silane coupling agent, said amic acid being the reaction product of an aromatic or aliphatic dianhydride and an aminoalkyltrialkoxysilane or aminoaryltrialkoxysilane, said alkoxysilane being a tetra(C 1 -C 3 )alkoxysilane, and said silane coupling agent being a glycidoxy(C 2 -C 4 )alkyltri(C 1 -C 2 )alkoxysilane.
Claim 3
Dependent Claim
11 words
The lacquer composition of claim 1 wherein the alkoxysilane is tetraethoxysilane.
Claim 4
Dependent Claim
13 words
The lacquer composition of claim 1 wherein the silane coupling agent is 3-glycidoxypropyltrimethoxysilane.
Claim 5
Dependent Claim
15 words
A protective coating comprising the reaction product of the to lacquer composition of claim 1.
Claim 6
Dependent Claim
66 words
A lacquer composition comprising an amic acid, an alkoxysilane and a silane coupling agent, said amic acid being the reaction product of pyromellitic dianhydride or the dianhydride of butanetetracarboxylic acid and an amino(C 2 -C 4 )alkyltri(C 1 -C 3 )alkoxysilane, said alkoxysilane being a tetra(C 1 -C 3 )alkoxysilane, and said silane coupling agent being a glycidoxy(C 2 -C 4 )alkyltri(C 1 -C 2 )alkoxysilane.
Claim 7
Dependent Claim
66 words
A lacquer composition comprising an amic acid, an alkoxysilane and a silane coupling agent, said amic acid being the reaction product of pyromellitic dianhydride or the dianhydride of butanetetracarboxylic acid and an amino(C 2 -C 4 )alkyltri(C 1 -C 3 )alkoxysilane, said alkoxysilane being a tetra(C 1 -C 3 )alkoxysilane, and said silane coupling agent being a glycidoxy(C 2 -C 4 )alkyltri(C 1 -C 2 )alkoxysilane.
Claim 8
Dependent Claim
14 words
A protective coating comprising the reaction product of the lacquer composition of claim 2.
Claim 9
Dependent Claim
14 words
A protective coating comprising the reaction product of the lacquer composition of claim 3.
Claim 10
Dependent Claim
14 words
A protective coating comprising the reaction product of the lacquer composition of claim 5.
Claim 11
Dependent Claim
19 words
A lacquer composition comprising (a) an alkoxysilane and (b) an alkoxysilane terminated polyamic acid or an alkoxysilane terminated polyimide.
Claim 12
Dependent Claim
19 words
A lacquer composition comprising (a) an alkoxysilane and (b) an alkoxysilane terminated polyamic acid or an alkoxysilane terminated polyimide.
Claim 13
Dependent Claim
23 words
The lacquer composition of claim 9 wherein the alkoxysilane is a tetra(C 1 -C 3 )alkoxysilane or a tri(C 1 -C 3 )alkoxysilane.
Claim 14
Dependent Claim
11 words
The lacquer composition of claim 10 wherein the alkoxysilane is tetraethoxysilane.
Claim 15
Dependent Claim
20 words
The lacquer composition of claim 9 further comprising a glycidoxy(C 2 -C 4 )alkyltri(C 1 -C 2 )alkoxysilane coupling agent.
Claim 16
Dependent Claim
12 words
The lacquer composition of claim 12 wherein the coupling agent is 3-glycidoxypropyltrimethoxysilane.
Claim 17
Dependent Claim
14 words
A protective coating comprising the reaction product of the lacquer composition of claim 9.
Claim 18
Dependent Claim
14 words
A protective coating comprising the reaction product of the lacquer composition of claim 10.
Claim 19
Dependent Claim
14 words
A protective coating comprising the reaction product of the lacquer composition of claim 11.
Claim 20
Dependent Claim
14 words
A protective coating comprising the reaction product of the lacquer composition of claim 12.
Claim 21
Dependent Claim
14 words
A protective coating comprising the reaction product of the lacquer composition of claim 13.
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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) | 1994-07-29 | 1995-01-28 | 1995-07-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-07-29 | 1999-01-28 | 1999-07-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-07-29 | 2003-01-28 | 2003-07-30 | $7700.00 | Window Closed / Lapsed |