Poly(amide-imide) copolymer, composition and polymer film comprising thereof

Patent metadata

Field	Value
Publication number	US-12404371-B2
Application number	US-202017053260-A
Country	US
Kind code	B2
Filing date	Jan 9, 2020
Priority date	Jan 11, 2019
Publication date	Sep 2, 2025
Grant date	Sep 2, 2025

Abstract

The present disclosure relates to a poly(amide-imide) copolymer in which each of at least one of imide repeating units and at least one of amide repeating units is substituted with a functional group including Chemical Formula 1,

wherein, R 1 is hydrogen or an alkyl group having 1 to 10 carbon atoms, and L is a single bond or an alkylene having 1 to 10 carbon atoms, and a composition and a polymer film comprising the same.

First claim

What is claimed is:

1. A polymer film comprising a cured product of a poly(amide-imide) copolymer comprising imide repeating units and amide repeating units,
wherein at least one of the imide repeating units is substituted with a functional group including Chemical Formula 1 and at least one of the amide repeating units is substituted with a functional group including Chemical Formula 1,
wherein the imide and amide repeating units each substituted with a functional group including Chemical Formula 1 are contained in an amount of 5 to 40 parts by mol based on 100 parts by mol of the whole repeating units of the poly(amide-imide) copolymer, and
wherein the polymer film has a yellow index of 1.61 to 1.72 measured according to ASTM D1925 based on a thickness of 50±2 μm, a glass transition temperature of 185° C. to 193° C. measured using a TMA IC600 device, and a modulus of 4.08 GPa to 4.21 GPa measured using DMA 9800 based on a thickness of 50±2 μm:

wherein,
R 1 is hydrogen or an alkyl group having 1 to 10 carbon atoms, and
L is a single bond or an alkylene having 1 to 10 carbon atoms.

2. The polymer film of claim 1 , wherein
R 1 is hydrogen or methyl.

3. The polymer film of claim 1 , wherein
L is an alkylene having 1 to 5 carbon atoms.

4. The polymer film of claim 1 , wherein
the at least one of the imide repeating units includes any one selected from the group consisting of a first repeating unit represented by Chemical Formula 2-1 and a second repeating unit represented by Chemical Formula 2-2:

wherein, in the Chemical Formulae 2-1 and 2-2,
X 1 is a tetravalent organic group,
R 2 to R 4 are each independently hydrogen; a hydroxy group; an alkyl group having 1 to 10 carbon atoms; or the functional group including the Chemical Formula 1,
Q 1 is a single bond, —O—, —S—, —C(═O)—, —CH(OH)—, —S(═O) 2 —, —Si(CH 3 ) 2 —, —(CH 2 )p- (where 1≤p≤10), —(CF 2 )q- (where 1≤q≤10), —C(CH 3 ) 2 —, —C(CF 3 ) 2 — or —C(═O)NH—, and
a, b, and c are each independently an integer of 1 to 4.

5. The polymer film of claim 1 , wherein
the at least one of the amide repeating units includes any one selected from the group consisting of a third repeating unit represented by Chemical Formula 3-1 and a fourth repeating unit represented by Chemical Formula 3-2:

wherein, in the Chemical Formulae 3-1 and 3-2,
X 2 is an arylene group having 6 to 30 carbon atoms,
R 5 and R 6 are each independently hydrogen, or an alkyl group having 1 to 10 carbon atoms,
R 7 to R 9 are each independently hydrogen; a hydroxyl group; an alkyl group having 1 to 10 carbon atoms; or the functional group including the Chemical Formula 1,
Q 2 is a single bond, —O—, —S—, —C(═O)—, —CH(OH)—, —S(═O) 2 —, —Si(CH 3 ) 2 —, —(CH 2 )p- (where 1≤p≤10), —(CF 2 )q- (where 1≤q≤10), —C(CH 3 ) 2 —, —C(CF 3 ) 2 — or —C(═O)NH—, and
d, e and f are each independently an integer of 1 to 4.

6. The polymer film of claim 4 , wherein
X 1 is any one group selected from the groups represented by the following structural formulae:

7. The polymer film of claim 5 , wherein
X 2 is any one group selected from the groups represented by the following structural formulae:

8. The polymer film of claim 1 , wherein
a molar ratio of the imide repeating units and the amide repeating units is 10:90 to 90:10.

9. The polymer film of claim 1 , wherein
a weight average molecular weight of the poly(amide-imide) copolymer is 5,000 to 300,000 g/mol.

10. The polymer film of claim 1 , wherein
the polymer film has a haze measured according to ASTM D1003 is 2% or less.

11. A method for producing the polymer film of claim 1 comprising the steps of: coating a composition comprising the poly(amide-imide) copolymer onto a substrate and curing the coated composition at a temperature of 200° C. or less.

12. The method of claim 11 , wherein the composition further comprises a photoinitiator.

13. The method of claim 11 , wherein the composition further comprises a polyfunctional (meth)acrylate monomer.

Assignees

• Lg Chemical Ltd

Inventors

• Lee Tae Seob
• Lim Yoon Bin
• Lim Jae Gu
• Lim Seung Joon
• Kim Se Jeong
• Kim Woo Han
• Park Gieun

Classifications

• C08F290/145

  Polyamides; Polyesteramides; Polyimides · CPC title

• C08G73/12

  Unsaturated polyimide precursors · CPC title

• C08G73/1039

  comprising halogen-containing substituents · CPC title

• C08G73/1042

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

• C08L2203/16

  used for films · CPC title