# US 10,246,556 B2 · Polyimide polymer and polyimide film

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- Number: US 10,246,556 B2
- Document ID: US10246556B2
- Status: Granted
- Kind: B2
- Application number: 15/678,131
- Filed: 2017-08-16
- Published: 2018-12-27
- Granted: 2019-04-02
- Earliest claimed: 2017-06-23
- Assignees: TAIFLEX Scientific Co., Ltd.
- Applicants: TAIFLEX Scientific Co., Ltd.
- Inventors: Ching-Hung Huang; Kuang-Ting Hsueh; Chiu-Feng Chen; Yi-Kai Fang; Chun-Cheng Wan
- Web page: https://patentgrep.com/patent/US10246556B2

## CPC

- C08G 73/1078: {wholly aromatic in the diamino moiety}
- C08G 73/1039: {comprising halogen-containing substituents}
- C08G 73/1042: {Copolyimides derived from at least two different tetracarboxylic compounds or two different diamino compounds}
- C08G 73/105: {with oxygen only in the diamino moiety}
- C08J 5/18: Manufacture of films or sheets
- C08J 2379/08: Polyimides; Polyester-imides; Polyamide-imides; Polyamide acids or similar polyimide precursors
- C08G: MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08J: WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H (working, e.g. shaping, of plastics B29)

## Abstract

A polyimide polymer is provided. The polyimide polymer includes a repeating unit represented by formula 1. In formula 1, Ar is a tetravalent organic group derived from a tetracarboxylic dianhydride containing an aliphatic structure, and A includes and at least one divalent organic group derived from an aromatic group-containing diamine other than

## Claims

### Claim 1

A polyimide polymer, comprising a repeating unit represented by formula 1:
wherein Ar is a tetravalent organic group derived from a tetracarboxylic dianhydride containing an aliphatic structure; and
A comprises
and at least one divalent organic group derived from an aromatic group-containing diamine other than

### Claim 2 (depends on 1)

The polyimide polymer according to claim 1, wherein the at least one divalent organic group derived from the aromatic group-containing diamine comprises at least one of a divalent organic group derived from a diamine having a fluorine-containing aromatic group and a divalent organic group derived from a diamine containing an aromatic group and an aliphatic structure.

### Claim 3 (depends on 2)

The polyimide polymer according to claim 2, wherein the diamine having the fluorine-containing aromatic group comprises 2,2′-bis(trifluoromethyl)-4,4′-diaminobiphenyl (TFMB), 4,4′-diamino-2,2′-bis(trifluoromethyl)diphenyl ether, 1,4-bis {4-amino-2-(trifluoromethyl)phenoxy}benzene, 2,2-bis {4-(4-aminophenoxy)phenyl}hexafluoropropane, 2,2′-bis[4-(4-amino-2-trifluoromethylphenoxy)-phenyl]hexafluoropropane, or 2,2′-bis(4-aminophenyl)hexafluoropropane.

### Claim 4 (depends on 2)

The polyimide polymer according to claim 2, wherein the diamine containing the aromatic group and the aliphatic structure comprises 4,4′-diamino-2,2′-dimethyl biphenyl (MTB), 4,4′-diamino-3,3′-dimethyl biphenyl, 2,2′-bis[4-(3-aminophenoxy)pheny]propane, or 4,4′-(1,3-phenylenediisopropylidene) bisaniline.

### Claim 5 (depends on 1)

The polyimide polymer according to claim 1, wherein based on total mole number of
and the at least one divalent organic group derived from the aromatic group-containing diamine, a mole percentage of
is 10% to 35%.

### Claim 6 (depends on 1)

A polyimide film comprising the polyimide polymer according to claim 1.

### Claim 7 (depends on 6)

The polyimide film according to claim 6, wherein based on a CIE L*a*b* color space, a value of b* of the polyimide film is smaller than 3.5.

### Claim 8 (depends on 6)

The polyimide film according to claim 6, wherein elongation of the polyimide film is greater than 10%.