# US 11,028,227 B2 · Poly(amide-imide) copolymer, composition for preparing poly(amide-imide) copolymer, article including poly(amide-imide) copolymer, and display device including the article

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- Number: US 11,028,227 B2
- Document ID: US11028227B2
- Status: Granted
- Kind: B2
- Application number: 16/126,250
- Filed: 2018-09-10
- Published: 2019-03-14
- Granted: 2021-06-08
- Earliest claimed: 2017-09-08
- Assignees: Samsung Electronics Co., Ltd.; Samsung SDI Co., Ltd.
- Applicants: Samsung Electronics Co., Ltd.; Samsung SDI Co., Ltd.
- Inventors: A Ra Jo; Chanjae Ahn; Sungwon Choi; Won Suk Chang; Boreum Jeong
- Web page: https://patentgrep.com/patent/US11028227B2

## CPC

- C08G 73/14: Polyamide-imides
- B29C 41/003: {characterised by the choice of material}
- B29C 41/46: Heating or cooling
- C08G 73/1039: {comprising halogen-containing substituents}
- C08G 73/1042: {Copolyimides derived from at least two different tetracarboxylic compounds or two different diamino compounds}
- C08J 5/18: Manufacture of films or sheets
- B29K 2079/08: {PI, i.e. polyimides or derivatives thereof}
- B29L 2007/008: {Wide strips, e.g. films, webs}
- 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
- B29C: SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING (making preforms B29B11/00; making laminated products by combining previously unconnected layers which become one product whose layers will remain together B32B37/00 - B32B41/00)
- 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)
- B29K: INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR {MOULDS, } REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
- B29L: INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES

## Abstract

A poly(amide-imide) copolymer that is a reaction product of a substituted or unsubstituted linear aliphatic diamine including two terminals, a diamine represented by Chemical Formula 1, a dicarbonyl compound represented by Chemical Formula 2, and a tetracarboxylic acid dianhydride represented by Chemical Formula 3: wherein, in Chemical Formulae 1 to 3, A, R3, R10, R12, R13, X, n7 and n8 are the same as defined in the specification.

## Claims

### Claim 1

A poly(amide-imide) copolymer that is a reaction product of a substituted or unsubstituted linear aliphatic diamine comprising two terminals, a diamine represented by Chemical Formula 1, a dicarbonyl compound represented by Chemical Formula 2, and a tetracarboxylic acid dianhydride mixture comprising a tetracarboxylic acid dianhydride represented by Chemical Formula 3-1 and a tetracarboxylic acid dianhydride represented by Chemical Formula 3-2:
NH2-A-NH2 Chemical Formula 1
wherein in Chemical Formula 1,
A is a ring system comprising two or more C6 to C30 aromatic rings linked by a single bond, wherein each of the two or more aromatic rings is independently unsubstituted or substituted by an electron-withdrawing group;
wherein, in Chemical Formula 2,
R3 is a substituted or unsubstituted phenylene or a substituted or unsubstituted biphenylene group, and
each X is an identical or different halogen atom;
wherein the linear aliphatic diamine is present in an amount of greater than 20 mol % and less than 90 mol %, and the diamine represented by Chemical Formula 1 is present in an amount of less than or equal to 80 mol % and greater than or equal to 10 mol %, based on the amount of total diamine.

### Claim 2 (depends on 1)

The poly(amide-imide) copolymer according to claim 1, wherein the two terminals of the substituted or unsubstituted linear aliphatic diamine are each an amino group, and the substituted or unsubstituted linear aliphatic diamine is a substituted or unsubstituted C1 to C30 saturated or unsaturated linear aliphatic diamine.

### Claim 3 (depends on 2)

The poly(amide-imide) copolymer according to claim 2, wherein the substituted or unsubstituted linear aliphatic diamine is a substituted or unsubstituted C1 to C20 saturated linear aliphatic diamine.

### Claim 4 (depends on 1)

The poly(amide-imide) copolymer according to claim 1, wherein the substituted or unsubstituted linear aliphatic diamine is selected from methylene diamine, ethylene diamine, 1,3-propane diamine, 1,4-tetramethylene diamine, 1,5-pentamethylene diamine, 1,6-hexamethylene diamine, 1,7-heptamethylene diamine, 1,8-octamethylene diamine, 9-nonamethylene diamine, 1,10-decamethylene diamine, 1,11-undecamethylene diamine, 1,12-dodecamethylene diamine, and a combination thereof.

### Claim 5 (depends on 1)

The poly(amide-imide) copolymer according to claim 1, wherein the diamine represented by Chemical Formula 1 comprises a ring system comprising two C6 to C12 aromatic rings linked by a single bond, wherein each of the two C6 to C12 aromatic rings are independently substituted by an electron-withdrawing group selected from a halogen atom, a nitro group, a cyano group, a C1 or C2 haloalkyl group, a C2 to C6 alkanoyl group, and a C2 to C6 ester group.

### Claim 6 (depends on 1)

The poly(amide-imide) copolymer according to claim 1, wherein the diamine represented by Chemical Formula 1 comprises at least one selected from the diamines represented by chemical formulae:

### Claim 7 (depends on 1)

The poly(amide-imide) copolymer according to claim 1, wherein the diamine represented by Chemical Formula 1 comprises a diamine represented by Chemical Formula A:

### Claim 8 (depends on 1)

The poly(amide-imide) copolymer according to claim 1, wherein in Chemical Formula 2, R3 is a phenylene group, and each X is independently Cl or Br.

### Claim 9 (depends on 1)

The poly(amide-imide) copolymer according to claim 1, wherein the mixture of tetracarboxylic acid dianhydride is a combination of 3,3′,4,4′-biphenyl tetracarboxylic dianhydride and 4,4′-(hexafluoroisopropylidene)diphthalic anhydride.

### Claim 10 (depends on 1)

The poly(amide-imide) copolymer according to claim 1, wherein the linear aliphatic diamine is greater than or equal to 30 mole percent and less than 90 mol %, and the diamine represented by Chemical Formula 1 is present in an amount of less than 70 mol % and greater than or equal to 10 mol %, based on the total amount of the linear aliphatic diamine and the diamine represented by Chemical Formula 1.

### Claim 11 (depends on 1)

The poly(amide-imide) copolymer according to claim 1, wherein a mole ratio of the dicarbonyl compound represented by Chemical Formula 2 and the tetracarboxylic acid dianhydride represented by Chemical Formula 3-1 and a tetracarboxylic acid dianhydride represented by Chemical Formula 3-2 is 20:80 to 30:70.