Diamine compound and method for producing same

Patent metadata

Field	Value
Publication number	US-11319282-B2
Application number	US-201716316536-A
Country	US
Kind code	B2
Filing date	Aug 11, 2017
Priority date	Aug 25, 2016
Publication date	May 3, 2022
Grant date	May 3, 2022

Abstract

The present invention provides a novel diamine compound capable of producing a polymer which exhibits greatly enhanced mechanical properties and heat resistance while maintaining transparency. A film including a polymer produced using the diamine compound has excellent transparency, heat resistance, mechanical strength and flexibility, and thus can be used in various fields, such as in a device substrate, a display cover substrate, an optical film, an Integrated circuit (IC) package, an adhesive film, a multi-layer flexible printed circuit (FPC), a tape, a touch panel and an optical disc protection film, and the like.

First claim

The invention claimed is:

1. A transparent film for a flexible substrate of a display device comprising a polymer comprising:
at least one repeating unit of Chemical Formula 16:

wherein, Q 1 and Q 2 are each independently selected from a fluoride atom (F), a C1-5 fluoroalkyl group, and a cyano group (CN); and
R is a hydrogen atom, a C1-10 alkyl group or a C6-30 aryl group,
wherein, X 1 is at least one tetravalent organic group selected from the compounds of Chemical Formulae 11a to 11h:

2. The transparent film according to claim 1 , wherein the transparent film has a haze value of 2 or less and a yellowness index of 20 or less.

3. The transparent film according to claim 1 ,
wherein the transparent film has a coefficient of thermal expansion (CTE) in a range from 0 ppm/° C. to 50 ppm/° C. at a temperature ranging from 50° C. to 200° C., and has an E (%) calculated according to Formula 1 of −20≤E<0 and a K (%) calculated according to Formula 2 of 0≤K≤20 as measured 2 m+1 times (m is an integer of 1 to 3) at the temperature range from 50° C. to 200° C.:
(Minimum CTE value−Average CTE value)/Average CTE value×100= E   [Formula 1]

(Maximum CTE value−Average CTE value)/Average CTE value×100= K   [Formula 2].

4. The transparent film according to claim 1 ,
wherein the transparent film which has a haze value of 2 or less.

5. A display device comprising the transparent film according to claim 2 .

6. The transparent film according to claim 1 , wherein the Q1 and Q2 are each independently selected from a C1-5 fluoroaklyl group.

7. The transparent film according to claim 1 , wherein the transparent film has an absorbance in a range from 0.1 to 0.9 as measured at 308 nm and a thickness of 1 cm.

8. A transparent film for a flexible substrate of display device comprising a polymer comprising: at least one repeating unit of Chemical Formula 20:

9. The transparent film according to claim 1 , wherein the transparent film has a yellowness index of 20 or less.

10. The transparent film according to claim 1 ,
wherein the transparent film has a coefficient of thermal expansion (CTE) in a range from 0 ppm/° C. to 50 ppm/° C. at a temperature ranging from 50° C. to 200° C.

11. The transparent film according to claim 1 ,
wherein the transparent film has an E (%) calculated according to Formula 1 of −20≤E≤0 and a K (%) calculated according to Formula 2 of 0≤K≤20 as measured 2 m+1 times (m is an integer of 1 to 3) at the temperature range from 50° C. to 200° C.:
(Minimum CTE value−Average CTE value)/Average CTE value ×b 100 = E   [Formula 1]

(Maximum CTE value−Average CTE value)/Average CTE value×100= K   [Formula 2]

Assignees

• Lg Chemical Ltd

Inventors

• Yun Cheolmin
• Suh Jun Sik
• Kim Kyungjun

Classifications

• C08G73/1039

  comprising halogen-containing substituents · CPC title

• G02B1/10

  Optical coatings produced by application to, or surface treatment of, optical elements (G02B1/08 takes precedence) · CPC title

• C08G73/14

  Polyamide-imides · CPC title

• C07C231/12

  by reactions not involving the formation of carboxamide groups · CPC title

• G02B1/04

  made of organic materials, e.g. plastics (G02B1/08 takes precedence) · CPC title