Polyimide precursor solution composition

Patent metadata

Field	Value
Publication number	US-9334368-B2
Application number	US-200913125451-A
Country	US
Kind code	B2
Filing date	Oct 28, 2009
Priority date	Oct 31, 2008
Publication date	May 10, 2016
Grant date	May 10, 2016

Abstract

A first polyimide precursor solution composition contains: (A) a polyamic acid; (B) a carboxylic acid compound having at least three pairs of carboxyl groups within its molecule or an esterified product thereof; and (D) a solvent. A second polyimide precursor solution composition contains the components (A), (B), and (D) of the first polyimide precursor solution composition and additionally containing (C) a carboxylic acid compound having two pairs of carboxyl groups within its molecule or an esterified product thereof. A third polyimide precursor solution composition contains the components of the second polyimide precursor solution composition, wherein the polyamic acid (A) is a polyamic acid having a specific structure.

First claim

The invention claimed is:

1. A polyimide precursor solution composition, consisting of:
(A) a polyamic acid;
(B) a carboxylic acid compound having at least three pairs of carboxyl groups within its molecule or an esterified product thereof; and
(D) a solvent,
wherein said carboxylic acid compound (B) is a mellitic acid compound represented by chemical formula (1):

wherein A 1 to A 6 each independently represent a monovalent group selected from a hydrogen atom, an aliphatic group, or an aromatic group.

2. The composition according to claim 1 , wherein the number of moles of the mellitic acid compound is 0.001 to 0.05 times the number of moles of a diamine component constituting the polyamic acid (A).

3. The composition according to claim 1 , wherein a molar ratio between a diamine component and a tetracarboxylic acid component constituting the polyamic acid (A), defined as the number of moles of the diamine component/the number of moles of the tetracarboxylic acid component, is from 0.98 to 1.05.

4. The composition according to claim 1 , wherein the polyamic acid (A) contains a repeating unit represented by chemical formula (3):

wherein A is a group selected from tetravalent groups obtained by removing carboxyl groups from the tetracarboxylic acids represented by chemical formula (4); and
B is a group selected from divalent groups obtained by removing amino groups from the diamines represented by chemical formula (5):

5. The composition according to claim 1 , wherein the concentration of (A) polyamic acid is 5% to 35% by mass.

6. A polyimide precursor solution composition, consisting of:
(A) a polyamic acid;
(B) a carboxylic acid compound having at least three pairs of carboxyl groups within its molecule or an esterified product thereof;
(C) a carboxylic acid compound having two pairs of carboxyl groups within its molecule or an esterified product thereof; and
(D) a solvent,
wherein said carboxylic acid compound (B) is a mellitic acid compound represented by chemical formula (1):

wherein A 1 to A 6 each independently represent a monovalent group selected from a hydrogen atom, an aliphatic group, or an aromatic group.

7. The composition according to claim 6 , wherein a total of the number of moles of the carboxylic acid compound (B) or esterified product thereof and the number of moles of the carboxylic acid compound (C) or esterified product thereof is 0.001 to 0.05 times the number of moles of a diamine component constituting the polyamic acid (A).

8. The composition according to claim 6 , wherein the number of moles of the carboxylic acid compound (B) or esterified product thereof is 0.0005 to 0.02 times the number of moles of a diamine component constituting the polyamic acid (A).

Assignees

• Hirano Tetsuji
• Kidosaki Toru
• Ube Industries

Inventors

• Hirano Tetsuji
• Kidosaki Toru

Classifications

• C08G73/1067

  Wholly aromatic polyimides, i.e. having both tetracarboxylic and diamino moieties aromatically bound · CPC title

• C08K5/092

  Polycarboxylic acids · CPC title

• H01M4/134

  Electrodes based on metals, Si or alloys · CPC title

• C08G73/1042 Primary

  Copolyimides derived from at least two different tetracarboxylic compounds or two different diamino compounds · CPC title

• H01M4/133

  Electrodes based on carbonaceous material, e.g. graphite-intercalation compounds or CFx · CPC title