Patent US5283313A successfully refreshed from Google Patents.
US5283313A
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Readily processable polyimide, preparation process of polyimide, and resin composition of polyimide
Assignee: Mitsui Chemicals Inc
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Filing: 1991-11-21
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Granted: 1994-02-01
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Expires: 2011-11-21
Abstract
Abstract A readily processable polyimide being blocked at the terminal of a polymer molecule with a divalent radical derived from dicarboxylic acid anhydride represented by the formula (IV): (* CHEMICAL STRUCTURE *) (IV) wherein Z is a divalent radical selected from the group consisting of a monoaromatic radical which is substantially unsubstituted or substituted with a radical having no reactivity with amine or carboxylic acid anhydride and has from 5 to 15 carbons atoms, condensed polyaromatic radical or noncondensed aromatic radical connected each other with a direct bond or a bridge member, and having a fundamental skeleton represented by recurring structural units of the formula (III): (* CHEMICAL STRUCTURE *) (III) wherein X and Y are -O- or -CO- and differ each other; preparation process of the polyimide; and resin composition containing the polyimide and fibrous reinforcement.
Inventors
- 👤 Wataru Yamashita
- 👤 Shoji Tamai
- 👤 Akihiro Yamaguchi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 07:57
CPC Classifications
C; C08; C08G; C08G73/00; C08G73/06; C08G73/10; C08G73/1067; C08G73/1071; C08G73/1003; C08G73/1007; C08G73/101; C08G73/1014; C08K; C08K7/00; C08K7/02
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
113 words
A readily melt processable polyimide comprising a polymer molecule terminally blocked with a divalent radical derived from dicarboxylic acid anhydride represented by the formula (IV): ##STR28## wherein Z is a divalent radical selected from the group consisting of a monoaromatic radical which is substantially unsubstituted or substituted with a radical having no reactivity with amine or carboxylic acid anhydride and has from 5 to 15 carbon atoms, condensed polyaromatic radical or noncondensed aromatic radical connected to each other with a direct bond or a bridge member, and having a fundamental skeleton represented by recurrind structural units of formula (III): ##STR29## wherein X and Y are --O-- or --CO-- and differ from each other.
Claim 2
Dependent Claim
113 words
A readily melt processable polyimide comprising a polymer molecule terminally blocked with a divalent radical derived from dicarboxylic acid anhydride represented by the formula (IV): ##STR28## wherein Z is a divalent radical selected from the group consisting of a monoaromatic radical which is substantially unsubstituted or substituted with a radical having no reactivity with amine or carboxylic acid anhydride and has from 5 to 15 carbon atoms, condensed polyaromatic radical or noncondensed aromatic radical connected to each other with a direct bond or a bridge member, and having a fundamental skeleton represented by recurrind structural units of formula (III): ##STR29## wherein X and Y are --O-- or --CO-- and differ from each other.
Claim 3
Dependent Claim
23 words
The polyimide of claim 1 wherein the recurring structural units of the formula (III) are recurring structural units of the formula (III-a); ##STR30##
Claim 4
Dependent Claim
23 words
The polyimide of claim 1 wherein the recurring structural units of the formula (III) are recurring structural units of the formula (III-b): ##STR31##
Claim 5
Dependent Claim
138 words
The polyimide of claim 1 obtained by a process comprising reacting 1 mole of a diamine compound represented by the formula (VII) ##STR32## wherein X is --O-- or --CO--, with from 0.8 to 1.0 mole of tetracarboxylic acid dianhydride represented by the formula (VIII): ##STR33## wherein Y is --O-- or --CO-- and differs from X in the formula (VII), in the presence of from 0.001 to 1.0 mole of dicarboxylic acid anhydride represented by the formula (IV): ##STR34## wherein Z is a divalent radical selected from the group consisting of a monoaromatic radical which is substantially unsubstituted or substituted with a radical having no reactivity with amine or carboxylic acid anhydride and has from 5 to 15 carbons atoms, condensed polyaromatic radical or noncondensed aromatic radical connected to each other with a direct bond or a bridge member.
Claim 6
Dependent Claim
40 words
The polyimide of claim 4 wherein the diamine compound of the formula (VII) is a diaminodiphenyl ether represented by the formula (VII-a): ##STR35## and the tetracarboxylic acid dianhydride of the formula (VIII) is 3,3',4,4'-benzophenonetetracarboxylic dianhydride of the formula (VIII-a): ##STR36##
Claim 7
Dependent Claim
39 words
The polyimide of claim 4 wherein the diamine compound of the formula (VII) is a diaminobenzophenone represented by the formula (VII-b): ##STR37## and the tetracarboxylic acid dianhydride of the formula (VIII) is 3,3',4,4'-diphenylethertetracarboxylic dianhydride of the formula (VIII-b): ##STR38##
Claim 8
Dependent Claim
138 words
A process for preparing the polyimide of claim 1 comprising reacting 1 mole of a diamine compound essentially represented by the formula (VII): ##STR39## wherein X is --O-- or --CO--, with from 0.8 to 1.0 mole or tetracarboxylic acid dianhydride represented by the formula (VIII): ##STR40## wherein Y is --O-- or --CO-- and differs from X in the formula (VII), in the presence of from 0.001 to 1.0 mole of dicarboxylic acid anhydride represented by the formula (IV): ##STR41## wherein Z is a divalent radical selected from the group consisting of a monoaromatic radical which is substantially unsubstituted or substituted with a radical having no reactivity with amine or carboxylic acid anhydride and has from 5 to 15 carbons atoms, condensed polyaromatic radical or noncondensed aromatic radical connected each other with a direct bond or a bridge member.
Claim 9
Dependent Claim
45 words
The process for preparing the polyimide of claim 7 wherein the diamine compound represented by the formula (VII) is a diaminodiphenyl ether represented by the formula (VII-a): ##STR42## and the tetracarboxylic acid dianhydride of the formula (VIII) is 3,3',4,4'-benzophenonetetracarboxylic dianhydride of the formula (VIII-a): ##STR43##
Claim 10
Dependent Claim
43 words
The process for preparing the polyimide of claim 7 wherein the diamine compound of the formula (VII) is a diaminobenzophenone represented by the formula (VII-b): ##STR44## and the tetracarboxylic acid dianhydride of the formula (VIII) is 3,3',4,4'-diphenylethertetracarboxylic dianhydride of the formula (VIII-b): ##STR45##
Claim 11
Dependent Claim
133 words
A polyimide composition comprising 100 parts by weight of a polyimide being blocked at the terminal of a polymer molecule with a divalent radical derived from dicarboxylic acid anhydride represented by the formula (IV): ##STR46## wherein Z is a divalent radical selected from the group consisting of a monoaromatic radical which is substantially unsubstituted or substituted with a radical having no reactivity with amine or carboxylic acid anhydride and has from 5 to 15 carbons atoms, condensed polyaromatic radical or noncondensed aromatic radical connected each other with a direct bond or a bridge member, and having a fundamental skeleton represented by recurring structural unit of the formula (III); ##STR47## wherein X and Y are --O-- or --CO-- and differ each other, and from 5 to 100 parts by weight of a fibrous reinforcement.
Claim 12
Dependent Claim
133 words
A polyimide composition comprising 100 parts by weight of a polyimide being blocked at the terminal of a polymer molecule with a divalent radical derived from dicarboxylic acid anhydride represented by the formula (IV): ##STR46## wherein Z is a divalent radical selected from the group consisting of a monoaromatic radical which is substantially unsubstituted or substituted with a radical having no reactivity with amine or carboxylic acid anhydride and has from 5 to 15 carbons atoms, condensed polyaromatic radical or noncondensed aromatic radical connected each other with a direct bond or a bridge member, and having a fundamental skeleton represented by recurring structural unit of the formula (III); ##STR47## wherein X and Y are --O-- or --CO-- and differ each other, and from 5 to 100 parts by weight of a fibrous reinforcement.
Claim 13
Dependent Claim
37 words
The polyimide composition of claim 10 wherein the fibrous reinforcement is a single fiber or a mixture of the fiber selected from the group consisting of glass fiber, carbon fiber, potassium titanate fiber and aromatic polyamide fiber.
Claim 14
Dependent Claim
29 words
The polyimide composition of claim 11 wherein the aromatic polyamide fiber has recurring structural units of the formula (1): ##STR48## the formula (2): ##STR49## or the formula (3): ##STR50##
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