Polyimide resin

Patent metadata

Field	Value
Publication number	US-10131748-B2
Application number	US-201414906385-A
Country	US
Kind code	B2
Filing date	Aug 4, 2014
Priority date	Aug 6, 2013
Publication date	Nov 20, 2018
Grant date	Nov 20, 2018

Abstract

A polyimide resin containing a repeating structural unit of the following formula (1), a repeating structural unit of the following formula (2), and a repeating structural unit of the following formula (A) or a repeating structural unit of the following formula (B), a content ratio of formula (1) with respect to the total of formula (1) and formula (2) being from 40 to 70 mol %, and a content ratio of formula (A) or formula (B) with respect to the total of formula (1) and formula (2) being more than 0 mol % and 25 mol % or less:

wherein R 1 represents a divalent group having from 6 to 22 carbon atoms containing at least one alicyclic hydrocarbon structure; R 2 represents a divalent chain aliphatic group having from 5 to 20 carbon atoms; R a represents a divalent group containing at least one aromatic ring which is bonded to a monovalent or divalent electron-attracting group; R b represents a divalent group containing —SO 2 — or —Si(R x )(R y )O— wherein R x and R y each independently represent a chain aliphatic group having from 1 to 3 carbon atoms, or a phenyl group; and X 1 , X 2 , X a , and X b each independently represent a tetravalent group having from 6 to 22 carbon atoms containing at least one aromatic ring.

First claim

The invention claimed is:

1. A polyimide resin, comprising:
a repeating structural unit represented by formula (1),
a repeating structural unit represented by formula (2), and
a repeating structural unit represented by formula (A):

wherein:
a content ratio of the repeating structural unit of formula (1) with respect to the total of the repeating structural unit of formula (1) and the repeating structural unit of formula (2) is from 40 to 70 mol %;
a content ratio of the repeating structural unit of formula (A) with respect to the total of the repeating structural unit of formula (1) and the repeating structural unit of formula (2) is more than 0 mol % and 25 mol % or less;
R 1 represents a divalent group having from 6 to 22 carbon atoms and comprising an alicyclic hydrocarbon structure;
represents a divalent chain aliphatic group having from 5 to 20 carbon atoms;
R a represents a divalent group consisting of at least one aromatic ring which is bonded to at least one electron-attracting group selected from the group consisting of a nitro group, a cyano group, a p-toluenesulfonyl group, a halogen, an alkyl halide group, a phenyl group, an acyl group, an alkylene halide group, —SO— and —CONH—; and
X 1 , X 2 , and X a each independently represent a tetravalent group having from 6 to 22 carbon atoms and comprising an aromatic ring.

2. The polyimide resin according to claim 1 , wherein the electron-attracting group is a halogen, an alkyl halide group, or an alkylene halide group.

3. The polyimide resin according to claim 2 , wherein the electron-attracting group is fluorine, an alkyl fluoride group, or an alkylene fluoride group.

4. The polyimide resin according to claim 1 , further comprising:
a repeating structural unit represented by formula (3):

wherein:
a content ratio of the repeating structural unit of formula (3) with respect to the total of the repeating structural unit of formula (1) and the repeating structural unit of formula (2) is 25 mol % or less;
R 3 represents a divalent group having from 6 to 22 carbon atoms and comprising an aromatic ring; and
X 3 represents a tetravalent group having from 6 to 22 carbon atoms and comprising an aromatic ring.

5. The polyimide resin according to claim 1 , having a melting point of 360° C. or less and a glass transition temperature of 200° C. or more.

6. A film, comprising the polyimide resin according to claim 1 .

7. A fiber, comprising the polyimide resin according to claim 1 .

8. A heat-resistant adhesive, comprising the polyimide resin according to claim 1 .

9. A composite material, comprising a fiber material impregnated with the polyimide resin according to claim 1 .

Assignees

• Mitsubishi Gas Chemical Co

Inventors

• Sato Yuuki
• Mitadera Jun

Classifications

• C08G73/1064

  containing sulfur · CPC title

• C08G73/106

  containing silicon · CPC title

• D01F6/74

  from polycondensates of cyclic compounds, e.g. polyimides, polybenzimidazoles · CPC title

• C08G73/1082

  wholly aromatic in the tetracarboxylic moiety · CPC title

• C08G73/1028

  characterised by the process itself, e.g. steps, continuous · CPC title