Patent US4826916A successfully refreshed from Google Patents.
US4826916A
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Silicone polymides, and method for making
Assignee: General Electric Co
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Filing: 1987-02-27
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Granted: 1989-05-02
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Expires: 2007-02-27
Abstract
Abstract Polyimidesiloxane coating compositions resulting from the intercondensation in the presence of methylanisole of various dianhydrides such as 2,2-bis[4-(3,4-dicarboxyphenoxy)phenyl]-propane dianhydride or bis(phthalicanhydride)tetramethyldisiloxane, or mixtures thereof with organic diamine such as toluenediamine, aminoalkyl terminated polydimethylsiloxane or oxydianiline.
Inventors
- 👤 Peter P. Policastro
- 👤 Pamela K. Hernandez
- 👤 Jonathan D. Rich
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 18:20
CPC Classifications
C; C08; C08G; C08G73/00; C08G73/06; C08G73/10; C08G73/1057; C08G73/106; C08G77/00; C08G77/42; C08G77/452; C08G77/455; C09; C09D; C09D183/00; C09D183/10
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
85 words
Silicone polyimide coating compositions comprising, by weight, (A) 100 parts of methylanisole, and (B) 2 to 150 parts of polyimidesiloxane selected from (1) the intercondensation product of reaction between substantially equal molar amounts of (i) aromatic bis(ether anhydride), and (ii) organic diamine selected from the class consisting of C.sub.(6-14) aryldiamine, aminoalkyl terminated polydiorganosiloxane and mixtures thereof, or (2) the intercondensation product of reaction between (iii) phthalic anhydride terminated polydiorganosiloxane, or a mixture of phthalic anhydride terminated polydiorganosiloxanedisiloxane and organic dianhydride and (iv) C.sub.(6-14) aryl diamine.
Claim 2
Dependent Claim
85 words
Silicone polyimide coating compositions comprising, by weight, (A) 100 parts of methylanisole, and (B) 2 to 150 parts of polyimidesiloxane selected from (1) the intercondensation product of reaction between substantially equal molar amounts of (i) aromatic bis(ether anhydride), and (ii) organic diamine selected from the class consisting of C.sub.(6-14) aryldiamine, aminoalkyl terminated polydiorganosiloxane and mixtures thereof, or (2) the intercondensation product of reaction between (iii) phthalic anhydride terminated polydiorganosiloxane, or a mixture of phthalic anhydride terminated polydiorganosiloxanedisiloxane and organic dianhydride and (iv) C.sub.(6-14) aryl diamine.
Claim 3
Dependent Claim
101 words
Silicone polyimide coating compositions comprising, by weight, (A) 100 parts of methylanisole, and (B) 2 to 150 parts of polyimidesiloxane selected from (1) the intercondensation product of reaction between substantially equal molar amounts of (i) 2,2-bis[4-(3,4-dicarboxyphenoxy)phenyl]propane dianhydride and (ii) organic diamine selected from the class consisting of toluenediamine, a polydimethylsiloxane having eight chemically combined organosiloxy units and terminal α-aminopropylsiloxy units and mixtures thereof, or (2) the intercondensation product of reaction between (iii) bis(phthalic anhydride) tetramethyldisiloxane, or a mixture of bis(phthalic anhydride)tetramethyl-disiloxane and organic dianhydride and (iv) organic diamine selected from the class consisting of oxydianiline, metaphenylenediamine, methylenedianiline, toluenediamine and mixtures thereof.
Claim 4
Dependent Claim
101 words
Silicone polyimide coating compositions comprising, by weight, (A) 100 parts of methylanisole, and (B) 2 to 150 parts of polyimidesiloxane selected from (1) the intercondensation product of reaction between substantially equal molar amounts of (i) 2,2-bis[4-(3,4-dicarboxyphenoxy)phenyl]propane dianhydride and (ii) organic diamine selected from the class consisting of toluenediamine, a polydimethylsiloxane having eight chemically combined organosiloxy units and terminal α-aminopropylsiloxy units and mixtures thereof, or (2) the intercondensation product of reaction between (iii) bis(phthalic anhydride) tetramethyldisiloxane, or a mixture of bis(phthalic anhydride)tetramethyl-disiloxane and organic dianhydride and (iv) organic diamine selected from the class consisting of oxydianiline, metaphenylenediamine, methylenedianiline, toluenediamine and mixtures thereof.
Claim 5
Dependent Claim
38 words
A coating composition in accordance with claim 2, where the polyimidesiloxane is the intercondensation product of reaction between 2,2-bis[4-(3,4-dicarboxyphenoxy)phenyl]propane dianhydride, and a mixture of toluenediamine and a polydimethylsiloxane having eight chemically combined dimethylsiloxy units and terminal α-aminopropylsiloxy units.
Claim 6
Dependent Claim
22 words
A coating composition in accordance with claim 2, where the polyimidesiloxane is the intercondensation product of reaction between bis(phthalic anhydride)tetramethyldisiloxane and oxydianiline.
Claim 7
Dependent Claim
24 words
A coating composition in accordance with claim 2, where the polyimidesiloxane is the intercondensation product of reaction between bis(phthalic anhydride)tetramethyldisiloxane, 2,2-bis[4-(3,4-dicarboxyphenoxy)phenyl]propane dianhydride, and oxydianiline.
Claim 8
Dependent Claim
24 words
A coating composition in accordance with claim 2, where the polyimidesiloxane is the intercondensation product of reaction between bis(phthalic anhydride)tetramethyldisiloxane, 5,5'-(1,1,3,3-tetramethyl-1,3-disiloxane)bis-norbornane-2,3-dicarboxylic anhydride, and oxydianiline.
Claim 9
Independent Claim
42 words
A method for making a silicone polyimide coating composition comprising effecting reaction between substantially equal molar amounts of aromatic bis(etheranhydride) and organic diamine selected from the class consisting of C.sub.(6-14) aryldiamine, aminoalkyl terminated polydiorganosiloxane and mixtures thereof, in the presence of methylanisole.
Claim 10
Independent Claim
42 words
A method for making a silicone polyimide coating composition comprising effecting reaction between substantially equal molar amounts of aromatic bis(etheranhydride) and organic diamine selected from the class consisting of C.sub.(6-14) aryldiamine, aminoalkyl terminated polydiorganosiloxane and mixtures thereof, in the presence of methylanisole.
Claim 11
Independent Claim
40 words
A method for making a silicone polyimide coating composition which comprises effecting reaction between substantially equal molar amounts of phthalicanhydride terminated polydiorganosiloxane, or a mixture of phthalicanhydride terminated polydiorganosiloxane and organic dianhydride and C.sub.(6-14) aryldiamine, in the presence of methylanisole.
Claim 12
Independent Claim
40 words
A method for making a silicone polyimide coating composition which comprises effecting reaction between substantially equal molar amounts of phthalicanhydride terminated polydiorganosiloxane, or a mixture of phthalicanhydride terminated polydiorganosiloxane and organic dianhydride and C.sub.(6-14) aryldiamine, in the presence of methylanisole.
Claim 13
Independent Claim
50 words
A method for making silicone polyimide coating compositions comprising effecting reaction between substantially equal molar amounts of 2,2-bis[4-(3,4-dicarboxyphenoxy)phenyl]propane dianhydride and organic diamines selected from the class consisting of toluene diamine, a polydimethylsiloxane having a chemically combined organosiloxy units and terminal α-aminopropylsiloxy units and mixtures thereof, in the presence of methylanisole.
Claim 14
Independent Claim
50 words
A method for making silicone polyimide coating compositions comprising effecting reaction between substantially equal molar amounts of 2,2-bis[4-(3,4-dicarboxyphenoxy)phenyl]propane dianhydride and organic diamines selected from the class consisting of toluene diamine, a polydimethylsiloxane having a chemically combined organosiloxy units and terminal α-aminopropylsiloxy units and mixtures thereof, in the presence of methylanisole.
Claim 15
Independent Claim
47 words
A method for making silicone polyimide coating compositions comprising effecting reaction between substantially equal molar amounts of bis(phthalicanhydride)tetramethyldisiloxane, or a mixture of bis(phthalicanhydride)tetramethyldisiloxane and organic dianhydride and organic diamine selected from the class consisting of oxydianiline, metaphenylenediamine, methylenedianiline, toluenediamine, and mixtures thereof, in the presence of methylanisole.
Claim 16
Independent Claim
47 words
A method for making silicone polyimide coating compositions comprising effecting reaction between substantially equal molar amounts of bis(phthalicanhydride)tetramethyldisiloxane, or a mixture of bis(phthalicanhydride)tetramethyldisiloxane and organic dianhydride and organic diamine selected from the class consisting of oxydianiline, metaphenylenediamine, methylenedianiline, toluenediamine, and mixtures thereof, in the presence of methylanisole.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
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| 3.5 Years (Year 4) | 1992-05-01 | 1992-10-31 | 1993-05-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-05-01 | 1996-10-31 | 1997-05-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-05-01 | 2000-10-31 | 2001-05-02 | $7700.00 | Window Closed / Lapsed |