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US5206337A
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Solvent-soluble polyimidesiloxane oligomer and process for producing the same
Assignee: Sumitomo Bakelite Co Ltd
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Filing: 1991-05-07
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Granted: 1993-04-27
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Expires: 2011-05-07
Abstract
Abstract The present invention provides an oligomer having an inherent viscosity η of 0.001-0.5 dl/g as measured at a concentration of 0.5 g/dl in N-methyl-2-pyrrolidone at 30° C., which has been obtained by subjecting to polymerization and imidization (a) an acid component consisting of an aromatic tetracarboxylic acid dianhydride and/or a derivative thereof and (b) a diamine component consisting of 5-100 mole % of a diaminosiloxane represented by the undermentioned formula (I) and 95-0 mole % of an organic diamine other than the formula (I): ##STR1## wherein R 1 is a divalent aliphatic group of 1-5 carbon atoms or a divalent aromatic group of 6 or more carbon atoms; R 2 and R 3 are each a monovalent aliphatic or aromatic group and may be the same or different; and m is an integer of 1-100, as well as an oligomer solution obtained by dissolving the above oligomer in an organic solvent.
Inventors
- 👤 Toshiro Takeda
- 👤 Naoshige Takeda
- 👤 Akira Tokoh
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 09:17
CPC Classifications
C; C08; C08G; C08G77/00; C08G77/04; C08G77/22; C08G77/26; C08G73/00; C08G73/06; C08G73/10; C08G73/1057; C08G73/106; C08G77/42; C08G77/452; C08G77/455
Claims Analysis
Total Claims: 23
Claim 1
Independent Claim
141 words
A low molecular weight polymer having an inherent viscosity η of 0.001-0.5 dl/g as measured at a concentration of 0.5 g/dl in N-methyl-2-pyrrolidone at 30° C. and having an imidization degree of 80-100%, which has been obtained by subjecting to polymerization and imidization (a) an acid component consisting of an aromatic tetracarboxylic acid dianhydride and/or a derivative thereof and (b) a diamine component consisting of 5-100 mole % of a diaminosiloxane represented by the undermentioned formula (I) and 95-0 mole % of an organic diamine other than the formula (I): ##STR12## wherein R 1 is a divalent aliphatic group of 1-5 carbon atoms or a divalent aromatic group of 6 or more carbon atoms; R 2 and R 3 are each a monovalent aliphatic or aromatic group and may be the same or different; and m is an integer of 1-100.
Claim 2
Dependent Claim
141 words
A low molecular weight polymer having an inherent viscosity η of 0.001-0.5 dl/g as measured at a concentration of 0.5 g/dl in N-methyl-2-pyrrolidone at 30° C. and having an imidization degree of 80-100%, which has been obtained by subjecting to polymerization and imidization (a) an acid component consisting of an aromatic tetracarboxylic acid dianhydride and/or a derivative thereof and (b) a diamine component consisting of 5-100 mole % of a diaminosiloxane represented by the undermentioned formula (I) and 95-0 mole % of an organic diamine other than the formula (I): ##STR12## wherein R 1 is a divalent aliphatic group of 1-5 carbon atoms or a divalent aromatic group of 6 or more carbon atoms; R 2 and R 3 are each a monovalent aliphatic or aromatic group and may be the same or different; and m is an integer of 1-100.
Claim 3
Dependent Claim
22 words
A polymer according to claim 1, wherein 5 mole % or more of the aromatic tetracarboxylic acid dianhydride is 3,3',4,4'-benzophenonetertracarboxylic acid dianhydride.
Claim 4
Dependent Claim
40 words
A polymer according to claim 2, wherein a part or the whole of the diaminosiloxane represented by the formula (I) has been reacted with the acid dianhydride at a molar ratio of acid dianhydride to diaminosiloxane of at least 2.
Claim 5
Dependent Claim
16 words
A polymer solution obtained by dissolving the polymer according to claim 2, in an organic solvent.
Claim 6
Dependent Claim
31 words
A polymer according to claim 1, wherein the acid component is a mixture of 3,3'-oxydiphthalic acid anhydride and 2,2-bis(3,4-dicarboxyphenyl)hexafluoropropane dianhydride and the molar ratio in the mixture is 90/10 to 10/90.
Claim 7
Dependent Claim
40 words
A polymer according to claim 5, wherein a part or the whole of the diaminosiloxane represented by the formula (I) has been reacted with the acid dianhydride at a molar ratio of acid dianhydride to diaminosiloxane of at least 2.
Claim 8
Dependent Claim
97 words
A polymer according to claim 1, wherein 10 mole % or more of the diamine component consists of the diaminosiloxane of the formula (I) and, as the organic diamine, an alkyl-substituted aromatic diamine represented by the following formula (II): ##STR13## wherein R 7 to R 10 are each an alkyl group of 1-4 carbon atoms; X, Y and Z are each --O--, ##STR14## is an integer of 1-4; m 2 , m 3 and m 4 are each an integer of 0 to 4; and n, p and q are each an integer of 0 to 10.
Claim 9
Dependent Claim
30 words
A polymer according to claim 7, wherein the molar ratio of the diaminosiloxane of the formula (I) and the alkyl-substituted aromatic diamine of the formula (II) is 50/50 to 100/0.
Claim 10
Dependent Claim
15 words
A polymer according to claim 8, wherein the alkyl-substituted aromatic diamine is 2,4-diaminotoluene or 2,6-diaminotoluene.
Claim 11
Dependent Claim
14 words
A polymer according to claim 8, wherein the alkyl-substituted aromatic diamine is 2,2-bis[4-(4-aminophenoxy) phenyl]propane.
Claim 12
Dependent Claim
13 words
A polymer according to claim 7, wherein the alkyl-substituted aromatic diamine is 2,4-diaminotoluene.
Claim 13
Dependent Claim
13 words
A polymer according to claim 7, wherein the alkyl-substituted aromatic diamine is 2,6-diaminotoluene.
Claim 14
Dependent Claim
13 words
A polymer according to claim 7, wherein the alkyl-substituted aromatic diamine is 2,2-bis[4-(4-aminophenoxy)phenyl]propane.
Claim 15
Dependent Claim
34 words
A polymer according to claim 1, wherein 10 mole % or more of the diamine component consists of the diaminosiloxane of the formula (I) and a diaminopyridine represented by the following formula (III). ##STR15##
Claim 16
Dependent Claim
28 words
A polymer according to claim 14, wherein the molar ratio of the diaminosiloxane of the formula (I) and the diaminopyridine of the formula (III) is 50/50 to 100/0.
Claim 17
Dependent Claim
38 words
A polymer according to claim 1, wherein a part or the whole of the diaminosiloxane represented by the formula (I) has been reacted with the acid dianhydride at a molar ratio, [acid dianhydride]/ [diaminosiloxane] of at least 2.
Claim 18
Dependent Claim
16 words
A polymer solution obtained by dissolving the polymer according to claim 1 in an organic solvent.
Claim 19
Dependent Claim
36 words
A polymer solution according to claim 17, wherein the organic solvent is selected from the group consisting of diethylene glycol dimethyl ether, triethylene glycol dimethyl ether, N-methyl-2-pyrrolidone, N,N-dimethylacetamide, tetrahydrofuran, methyl ethyl ketone, dioxane and chlorinated hydrocarbons.
Claim 20
Dependent Claim
134 words
A polymer having an inherent viscosity η of 0.001-0.5 dl/g as measured at a concentration of 0.5 g/dl in N-methyl-2-pyrrolidone at 30° C., which has been obtained by subjecting to polymerization and imidization (a) an acid component containing 50 mole % or more of 3,3',4,4'-benzophenone tetracarboxylic acid dianhydride and/or a derivative thereof and (b) a diamine component containing 50 mole % or more of an alkyl-substituted aromatic diamine represented by the following formula (II): ##STR16## wherein R 7 to R 10 are each an alkyl group of 1-4 carbon atoms; X, Y and Z are each --O--, ##STR17## m 1 is an integer of 1-4; m 2 , m 3 and m 4 are each an integer of 0 to 4; and n, p and q are each an integer of 0 to 10.
Claim 21
Dependent Claim
134 words
A polymer having an inherent viscosity η of 0.001-0.5 dl/g as measured at a concentration of 0.5 g/dl in N-methyl-2-pyrrolidone at 30° C., which has been obtained by subjecting to polymerization and imidization (a) an acid component containing 50 mole % or more of 3,3',4,4'-benzophenone tetracarboxylic acid dianhydride and/or a derivative thereof and (b) a diamine component containing 50 mole % or more of an alkyl-substituted aromatic diamine represented by the following formula (II): ##STR16## wherein R 7 to R 10 are each an alkyl group of 1-4 carbon atoms; X, Y and Z are each --O--, ##STR17## m 1 is an integer of 1-4; m 2 , m 3 and m 4 are each an integer of 0 to 4; and n, p and q are each an integer of 0 to 10.
Claim 22
Dependent Claim
151 words
A low molecular weight polymer having an inherent viscosity η of 0.001-0.5 dl/g as measured at a concentration of 0.5 g/dl in N-methyl-2-pyrrolidone at 30° C. and having an imidization degree of 80-100%, which has been obtained by subjecting to polymerization and imidization (a) an acid component consisting of an aromatic tetracarboxylic acid dianhydride and/or a derivative thereof and (b) a diamine component consisting of 5-100 mole % of a diaminosiloxane represented by the undermentioned formula (I) and 95-0 mole % of an organic diamine other than the formula (I): ##STR18## wherein R 1 is a divalent aliphatic group of 1-5 carbon atoms or a divalent aromatic group of 6 or more carbon atoms; R 2 and R 3 are each a monovalent aliphatic or aromatic group and may be the same or different; and m is an integer of 1-100; wherein the alkyl-substituted aromatic diamine is 2,4-diaminotoluene, 2,6-diaminotoluene, or 2,2-bis[4-(4-aminophenoxy)phenyl]propane.
Claim 23
Dependent Claim
151 words
A low molecular weight polymer having an inherent viscosity η of 0.001-0.5 dl/g as measured at a concentration of 0.5 g/dl in N-methyl-2-pyrrolidone at 30° C. and having an imidization degree of 80-100%, which has been obtained by subjecting to polymerization and imidization (a) an acid component consisting of an aromatic tetracarboxylic acid dianhydride and/or a derivative thereof and (b) a diamine component consisting of 5-100 mole % of a diaminosiloxane represented by the undermentioned formula (I) and 95-0 mole % of an organic diamine other than the formula (I): ##STR18## wherein R 1 is a divalent aliphatic group of 1-5 carbon atoms or a divalent aromatic group of 6 or more carbon atoms; R 2 and R 3 are each a monovalent aliphatic or aromatic group and may be the same or different; and m is an integer of 1-100; wherein the alkyl-substituted aromatic diamine is 2,4-diaminotoluene, 2,6-diaminotoluene, or 2,2-bis[4-(4-aminophenoxy)phenyl]propane.
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) | 1996-04-26 | 1996-10-26 | 1997-04-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2000-04-26 | 2000-10-26 | 2001-04-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2004-04-26 | 2004-10-26 | 2005-04-27 | $7700.00 | Window Closed / Lapsed |