# US 11,898,010 B2 · Polyimides, ketone-containing alicyclic dianhydrides and applications thereof

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- Number: US 11,898,010 B2
- Document ID: US11898010B2
- Status: Granted
- Kind: B2
- Application number: 17/383,782
- Filed: 2021-07-23
- Published: 2022-11-24
- Granted: 2024-02-13
- Earliest claimed: 2021-05-07
- Assignees: National Taiwan University of Science and Technology
- Applicants: National Taiwan University of Science and Technology
- Inventors: Jyh-Chien Chen; Hsiang Jung Lee; Kai-Cheng Zhong
- Web page: https://patentgrep.com/patent/US11898010B2

## CPC

- C08G 73/1078: {wholly aromatic in the diamino moiety}
- C07D 493/08: Bridged systems
- C08G 73/1007: {from tetracarboxylic acids or derivatives and diamines}
- 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
- C09D 179/08: Polyimides; Polyester-imides; Polyamide-imides; Polyamide acids or similar polyimide precursors
- 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
- C07D: HETEROCYCLIC COMPOUNDS (macromolecular compounds C08)
- 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)
- C09D: COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR (cosmetics A61K; processes for applying liquids or other fluent materials to surfaces, in general, B05D; staining wood B27K5/02; glazes or vitreous enamels C03C; natural resins, French polish, drying-oils, driers, turpentine, per se, C09F; polishing compositions other than French polish, ski waxes C09G; adhesives or use of materials as adhesives C09J; materials for sealing or packing joints or covers C09K3/10; materials for stopping leaks C09K3/12; processes for the electrolytic or electrophoretic production of coatings C25D)

## Abstract

Present invention is related to a polyimide of formula as following: and a ketone-containing alicyclic dianhydride of formula as following: wherein: R1, R2, R3, R4 denote hydrogen atom or carbon containing functional group with carbon number at a range of 1-4; R5 denotes diamine group; and n equals to any positive integer.

## Claims

### Claim 1

A polyimide comprises at least one of below repeated structures as formula (1) and formula (2):
wherein in formula (1) or in formula (2):
R1, R2, R3 and R4 represent hydrogen atom and/or carbon containing functional group including C1 to C4 alkanes;
R5 represents aliphatic group or aromatic group; and
n represents any positive integer.

### Claim 2 (depends on 1)

The polyimide as claimed in claim 1, wherein the aliphatic group comprises aliphatic diamine or aromatic group comprises aromatic diamine.

### Claim 3 (depends on 2)

The polyimide as claimed in claim 2, wherein the aromatic diamine and aliphatic diamine comprise 4,4′-bis(aminophenyl)ether and 2,2′-bis(trifluoromethyl)benzidine.

### Claim 4 (depends on 1)

A membrane, film or coat comprise polyimide as claimed in claim 1.

### Claim 5 (depends on 2)

A membrane, film or coat comprise polyimide as claimed in claim 2.