EP0367482A1
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Polyimides and process for the preparation thereof
Assignee: Mitsui Chemicals Inc
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Filing: 1989-10-25
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Granted: —
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Expires: 2009-10-25
Abstract
Abstract The present invention relates to polyimides having excellent thermal resistance and process for preparing the same comprising carring out condensation of 4,4′- bis(3-aminophenoxy)biphenyl with pyromellitic dianhydride in the presence of a diamine compound and/or tetracarboxylic acid dianhydride. The polyimides have a non-crystalline structure and exhibit excellent thermal resistance and processability.
Inventors
- 👤 Shoji Tamai
- 👤 Saburo Kawashima
- 👤 Masahiro Ohta
- 👤 Katsuaki Iiyama
- 👤 Hideaki Oikawa
- 👤 Kouji Ohkoshi
- 👤 Akihiro Yamaguchi
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-28 12:57
CPC Classifications
C; C08; C08G; C08G73/00; C08G73/06; C08G73/10; C08G73/1042; C08G73/1046; C08G73/105; C08G73/1067; C08G73/1071
Claims Analysis
Total Claims: 23
Claim 1
Independent Claim
161 words
(1) A process for preparing a polyimide comprising carrying out condensation of 4,4′-bis(3-aminophenoxy)biphenyl of the formula(I ) : with a pyromellitic dianhydride of the formula (II) : in the presence of at least one compound selected from the group consisting of a diamine compound represented by the formula(III) : H₂N - R₁ - NH₂ (II) wherein R₁ is a divalent group selected from the group consisting of an aliphatic group, an alicyclic group, a monocyclic aromatic group, a fused polycylic aromatic group and a polycyclic aromatic group combined with a member selected from the group consisting of a direct bond, a bridge member; and a tetracarboxylic acid dianhydride of the formula(IV) : wherein R₂ is a tetravalent group selected from the group consisting of an aliphatic group, an alicyclic group, a monocyclic aromatic group, a fused polycyclic aromatic group and a polycyclic aromatic group combined with a member selected from the group consisting of a direct bond and a bridge member.
Claim 2
Dependent Claim
64 words
(2) The process of claim 1 wherein said polyimide is non-crystalline and at least one of said diamine compound of the formula(III) and said tetracarboxylic acid dianhydride of the formula(IV) is present in an amount of from about 1 to about 100 % by mole per mole of at least one of said 4,4′-bis(3-aminophenoxy)biphenyl of the formula(I) and said pyromellitic dianhyhydride of the formula(II).
Claim 3
Dependent Claim
66 words
(3) The process of claim 1 wherein said polyimide is crystalline and wherein at least one of diamine compound of the formula(III) and said tetracarboxylic acid dianhydride of the formula (IV) is present in an amount of from about 1 to about 30 % by mole per mole of at least one of said 4,4′-bis(3-aminophenoxy)biphenyl of the formula( I and said pyromellitic dianhydride of the formula(II).
Claim 4
Dependent Claim
42 words
(4) The process of claim 1 wherein said diamine compound of the formula( III ) is a compound wherein R₁ is a polycyclic aromatic group combined with a member selected from the group consisting of a direct bond and a bridge member.
Claim 5
Dependent Claim
40 words
(5) The process of claim 2 wherein said diamine compound of the formula(III) is a compound wherein R₁ is a polycyclic aromatic group combined with a member selected from the group consisting of a direct bond and a bridge member.
Claim 6
Dependent Claim
19 words
(6) The process of claim 1 wherein said diamine compound of formula(III) is a compound wherein R₁ is bis(4-aminophenyl)ether.
Claim 7
Dependent Claim
20 words
(7) The process of claim 2 wherein said diamine compound of the formula(III) is a compound wherein R₁ is bis(4-aminophenyl)ether.
Claim 8
Dependent Claim
40 words
(8) The process of claim 1 wherein said tetracarboxylic acid dianhydride of formula(IV) is a compound wherein R₂ is a polycyclic aromatic group combined with a member selected from the group consisting of a direct bond and a bridge member.
Claim 9
Dependent Claim
35 words
(9) The process of claim 2 wherein said tetracarboxylic acid dianhydride of formula(IV) is a polycyclic aromatic group combined with a member selected from the group consisting of a direct bond and a bridge member.
Claim 10
Dependent Claim
16 words
(10) The process of claim 1 wherein said tetracarboxylic acid dianhydride of formula(IV) is 3,3′,4,4′-biphenyltetracarboxylic anhydride.
Claim 11
Dependent Claim
58 words
(11) The process of claim 1 wherein said polyimide is non-crystalline, said diamine of formula(III) is bis(4-aminophenyl)ether and at least one of said diamine compound and said tetracarboxylic acid dianhydride of the formula(IV) is present in an amount of from about 2% to about 30% by mole of at least one of said 4,4-bis(3-aminophenoxy)biphenyl and said pyromellitic dianhydride.
Claim 12
Dependent Claim
12 words
(12) The process of claim 1 further comprising a dicarboxylic acid anhydride.
Claim 13
Dependent Claim
37 words
(13) The process of claim 12 wherein said dicarboxylic acid anhydride is present in an amount of from 0.001 to 1.0 mole per total moles of said 4,4-bis(3-aminophenoxy)biphenyl of formula(I ) and said diamine compound of formula(III)
Claim 14
Dependent Claim
14 words
(14) The process of claim 13 wherein said dicarboxylic acid anhydride is phthalic anhydride.
Claim 15
Dependent Claim
63 words
(15) The process of claim 2 wherein said diamine compounds of the formula(III) is 4,4′-diaminodiphenyl ether and is present in an amount of from about 2 to about 30 % by mole per mole of 4,4′-bis(3-aminophenoxy)biphenyl of the formula(I), further comprising phthalic anhydride present in an amount of from about 0.001 to about 1.0 mole per total moles of 4,4′-bis(3-aminophenoxy)biphenyl and 4,4′-diaminodiphenyl ether.
Claim 16
Dependent Claim
11 words
(16) A non-crystalline polyimide prepared by the process of claim 1.
Claim 17
Dependent Claim
11 words
(17) A non-crystalline polyimide prepared by the process of claim 2.
Claim 18
Dependent Claim
11 words
(18) A crystalline polyimide prepared by the process of claim 1.
Claim 19
Dependent Claim
11 words
(19) A crystalline polyimide prepared by the process of claim 3.
Claim 20
Dependent Claim
184 words
(20) A polyimide having two or more of recurring structural units represented by the formula (V) : wherein Q₁ and Q₂ are each groups selected from the group consisting of an aliphatic group, a alicyclic group, a monocyclic aromatic group, a fused polycyclic aromatic group and a polycyclic aromatic group combined with a member selected from the group consisting of a direct bond and a bridge member, Q₁ is a divalent group and Q₂ is a tetravalent group ; said recurring structural units of the formula(V) comprising about 50 % by mole or more of recurring structural units having the formula (VI) : and from about 0.5 to about 50 % by mole of at least recurring structural units selected from the group of recurring strucural units of the formula( VII),formula(VIII) and the formula(IX) : wherein R₁ is a divalent group selected from the group consisting of an aliphatic group, an alicyclic group, a monocyclic aromatic group, a fused polycylic aromatic group and a polycyclic aromatic group combined with a member selected from the group consisting of a direct bond and a bridge member.
Claim 21
Dependent Claim
11 words
(21) The polyimide of claim 20 wherein said polyimide is non-crystalline.
Claim 22
Dependent Claim
63 words
(22) The polyimide of claim 20 wherein said polyimide is crystalline and comprises at least about 85 % by mole of the recurring structural unit of the formula( VI) and from about 0.5 to about 15 % by mole of at least one recurring structural units selected from the group consisting of recurring structural units of the formula( VII), formula(VIII) and the formula(IX).
Claim 23
Dependent Claim
207 words
(23) A process for controlling the rate of crystallization in the preparation of a crystalline polyimide from a non-crystalline polyimide comprising carrying out condensation of 4,4′-bis(3-aminophenoxy)biphenyl of the formula(I ) : with pyromellitic dianhydride of the formula (II) : in the presence of at least one compound selected from the group consisting of diamine compound represented by the formula (III) : H₂ N - R₁ - NH₂ (III) wherein R₁ is a divalent group selected from the group consisting of an aliphatic group, an alicyclic group, a monocyclic aromatic group, a fused polycyclic aromatic group and a polycyclic aromatic group combined with a member selected from the group consisting of a direct bond and a bridge member and a tetracarboxylic acid dianhydride represented by the formula (IV) : wherein R₂ is a tetravalent group selected from the group consisting of an aliphatic group, an alicyclic group, a monocyclic aromatic group, a fused polycyclic aromatic group and a polycyclic aromatic group combined with a member selected from the gruop consisting of a direct bond and a bridge member , in an amount from about 1 to about 30% by mole per mole of at least one of 4,4′-bis(3-aminophenoxy)biphenyl of the formula(I ) and pyromellitic dianhydride of the formula(II).
References Cited (Backward Citations)
US4196144A
Cited
EP0243507A1
Cited
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