POLYAMIDE-IMIDE RESIN FILM

• US 20200131315A1
• Filed: 12/07/2018
• Published: 04/30/2020
• Est. Priority Date: 01/09/2018
• Status: Active Grant

• Current Assignee: LG Chem Limited (LG Corporation)
• Original Assignee: LG Chem Limited (LG Corporation)
• Inventors: KIM, Byungguk, EOM, Youngsik, KIM, Sanggon, YU, Yunah, CHOI, Hyungsam
• Granted Patent: US 11,407,858 B2
• Time in Patent Office: Days
• CPC Class Codes: C08G 69/12 with both amino and carboxylic groups aromatically bound
• CPC Class Codes: C08G 73/10 Polyimides; Polyester-imides; Polyamide-imides; Polyamide acids or similar polyimide precursors
• CPC Class Codes: C08G 73/14 Polyamide-imides
• CPC Class Codes: C08J 2379/08 Polyimides; Polyester-imides; Polyamide-imides; Polyamide acids or similar polyimide precursors
• CPC Class Codes: C08J 5/18 Manufacture of films or sheets

Abstract

The present invention relates to a polyamide-imide resin film having a low birefringence index, including: a polyamide-imide block copolymer containing an amide repeating unit to which an isophthaloyl group and an aromatic diamine residue are bonded; an imide repeating unit; and a trivalent functional group containing an aromatic tricarbonyl group.

Claims

1. A polyamide-imide resin film comprising:

a polyamide-imide block copolymer containing an amide repeating unit having an isophthaloyl group and an aromatic diamine residue;

an imide repeating unit; and

a trivalent functional group containing an aromatic tricarbonyl group,

wherein retardation (Rth) in the thickness direction measured at a wavelength of 590 nm is 2000 nm or less.

2. The polyamide-imide resin film according to claim 1, wherein

a block containing the amide repeating unit and a block containing the imide repeating unit are bonded via the trivalent functional group containing the aromatic tricarbonyl group.

3. The polyamide-imide resin film according to claim 1, wherein

the polyamide-imide resin film has isotropy.

4. The polyamide-imide resin film according to claim 1, wherein

the polyamide-imide resin film has a thickness of 5 μ

m to 100 μ

m.

5. The polyamide-imide resin film according to claim 1, wherein

the polyamide-imide block copolymer includes a first repeating unit represented by Chemical Formula 1 and a second repeating unit represented by Chemical Formula 2:

6. The polyamide-imide resin film according to claim 5, wherein

the first repeating unit includes a repeating unit represented by Chemical Formula 1-a:

7. The polyamide-imide resin film according to claim 6, wherein:

R¹¹ and R¹³ are the same as or different from each other in each repeating unit, and each independently represents a single bond or —

C(CF₃)₂—

;

Z¹⁰ is a trivalent linking group derived from one or more compounds which are selected from the group consisting of 1,3,5-benzenetricarbonyl trichloride, 1,2,4-benzenetricarbonyl trichloride, 1,3,5-benzenetricarboxylic acid, 1,2,4-benzenetricarboxylic acid, trimethyl 1,3,5-benzenetricarboxylate, and trimethyl 1,2,4-benzenetricarboxylate.

8. The polyamide-imide resin film according to claim 5, wherein

the first repeating unit includes a repeating unit represented by Chemical Formulae 1-b 1-c:

9. The polyamide-imide resin film according to claim 5, wherein

Z²⁰ is a group selected from the group consisting of the following structural formulas:

10. The polyamide-imide resin film according to claim 5, wherein

the second repeating unit includes a repeating group represented by Chemical Formula 2-a:

11. The polyamide-imide resin film according to claim 5, wherein

the second repeating unit includes a repeating group represented by Chemical Formula 2-b:

12. The polyamide-imide resin film according to claim 5, wherein

the polyamide-imide block copolymer further includes a third repeating unit represented by Chemical Formula 3:

*

E³¹-Y³⁰-E³²-Z³⁰-E³³

* 

 

[Chemical Formula 3]

wherein, in the Chemical Formula 3,

each Y³⁰ is the same as or different from each other in each repeating unit, and each independently includes a divalent aromatic organic group having 6 to 30 carbon atoms, wherein the aromatic organic group exists alone, two or more of the aromatic organic groups are bonded to each other to form a divalent condensed ring, or two or more of the aromatic organic groups are linked by a single bond, a fluorenyl group, —

O—

, —

S—

, —

C(═

O)—

, —

CH(OH)—

, —

S(═

O)₂—

, —

Si(CH₃)₂—

, —

(CH₂)_p—

(wherein 1≤

p≤

10), —

(CF₂)_q—

(wherein 1≤

q≤

10), —

C(CH₃)₂—

, —

C(CF₃)₂—

, or —

C(═

O)NH—

;

E³¹, E³², and E³³ are each independently a single bond or —

NH—

;

each Z³⁰ is the same as or different from each other in each repeating unit, and each is a divalent linking group in the form of —

C(═

O)-A-C(═

O)—

derived from one or more compounds selected from the group consisting of diacyl halide, dicarboxylic acid, and dicarboxylate;

in Z³⁰, A is a divalent aromatic organic group having 6 to 20 carbon atoms, a divalent heteroaromatic organic group having 4 to 20 carbon atoms, a divalent alicyclic organic group having 6 to 20 carbon atoms, or a divalent organic group in which two or more of the organic groups are linked by a single bond, a fluorenyl group, —

O—

, —

S—

, —

C(═

O)—

, —

CH(OH)—

, —

S(═

O)₂—

, —

Si(CH₃)₂—

, —

(CH₂)_p—

(wherein 1≤

p≤

10), —

(CF₂)_q—

(wherein 1≤

q≤

10), —

C(CH₃)₂—

, —

C(CF₃)₂—

, or —

C(═

O)NH—

; and

in Z₃₀, two carbonyl groups connected to both sides of A are bonded at a para position to each other with respect to A.

13. The polyamide-imide resin film according to claim 12, wherein

Z³⁰ is a group selected from the group consisting of the following structural Formulae:

14. The polyamide-imide resin film according to claim 12, wherein

the third repeating unit includes a repeating unit represented by Chemical Formula 3-a:

15. The polyamide-imide resin film according to claim 12, wherein

the third repeating unit includes a repeating unit represented by Chemical Formulae 3-b or 3-c:

16. The polyamide-imide resin film according to claim 12, wherein a molar ratio of the third repeating unit to the second repeating unit is 0.5 to 3.