Polyamide block copolymer and polyamide film including the same

Patent metadata

Field	Value
Publication number	US-11926702-B2
Application number	US-201916969884-A
Country	US
Kind code	B2
Filing date	Apr 2, 2019
Priority date	Apr 2, 2018
Publication date	Mar 12, 2024
Grant date	Mar 12, 2024

Abstract

The present disclosure relates to a polyamide block copolymer and a polyamide film including the same.The polyamide block copolymer according to the present disclosure makes it possible to provide a polyamide film exhibiting excellent mechanical properties while being colorless and transparent.

First claim

The invention claimed is:

1. A polyamide block copolymer, comprising
A) an amide bond by an aromatic diamino group and a benzene-dicarbonyl group, and
B)
b1) a first polyamide segment, wherein a ratio of a benzene-1,3-dicarbonyl group to a total of the benzene-1,3-dicarbonyl group and a benzene-1,4-dicarbonyl group is 2 mol % to 20 mol %, and
b2) a second polyamide segment, wherein a ratio of the benzene-1,3-dicarbonyl group to a total of the benzene-1,3-dicarbonyl group and the benzene-1,4-dicarbonyl group is more than 20 mol % and 40 mol % or less,
C) wherein a molar ratio of the first polyamide segment to the second polyamide segment is 1:0.5 to 1:10.

2. The polyamide block copolymer of claim 1 , wherein the polyamide block copolymer has a ratio of the benzene-1,3-dicarbonyl group to a total of the benzene-1,3-dicarbonyl group and the benzene-1,4-dicarbonyl group is 5 to 25 mol %.

3. The polyamide block copolymer of claim 1 ,
wherein the aromatic diamino group has a diamino group derived from at least one selected from the group of 2,2′-bis(trifluoromethyl)-4,4′-biphenyldiamine, 2,2′-dimethyl-4,4′-diaminobenzidine, 4,4′-diaminodiphenyl sulfone, 4,4′-(9-fluorenylidene)dianiline, bis(4-(4-aminophenoxy)phenyl)sulfone, 2,2′,5,5′-tetrachlorobenzidine, 2,7-diaminofluorene, 4,4-diaminooctafluorobiphenyl, m-phenylenediamine, p-phenylenediamine, 4,4′-oxydianiline, 2,2′-dimethyl-4,4′-diaminobiphenyl, 2,2-bis[4-(4-aminophenoxy)phenyl]propane, 1,3-bis(4-aminophenoxy)benzene, and 4,4′-diaminobenzanilide.

4. The polyamide block copolymer of claim 1 ,
wherein the polyamide block copolymer has a weight average molecular weight is 10,000 to 700,000 g/mol.

5. A polyamide film comprising the polyamide block copolymer of claim 1 .

6. The polyamide film of claim 5 ,
wherein the polyamide film has a haze value of 1.0 or less as measured according to ASTM D 1003.

7. The polyamide film of claim 5 ,
wherein the polyamide film has a yellow index value of 3.0 or less as measured according to ASTM E 313.

8. The polyamide film of claim 5 ,
wherein the polyamide film has a modulus of at least 6.5 as measured according to ISO 527-3.

9. The polyamide film of claim 5 ,
wherein the polyamide film has an elongation of at least 10% as measured according to ISO 527-3.

10. A resin laminate comprising:
a substrate; and
a polymer resin layer comprising the polyamide block copolymer of claim 1 .

11. The resin laminate of claim 10 ,
wherein the substrate comprises at least one polymer selected from the group of polyimide-based polymer, polycarbonate-based polymer, polyester-based polymer, polyalkyl(meth)acrylate-based polymer, polyolefin-based polymer, and polycyclicolefin-based polymer.

Assignees

• Lg Chemical Ltd

Inventors

• Ryu Bi Oh
• Park Soonyong
• Park Youngseok
• Paek Kwanyeol
• Tae Young Ji
• Choi Il Hwan

Classifications

• C08G69/32 Primary

  from aromatic diamines and aromatic dicarboxylic acids with both amino and carboxylic groups aromatically bound · CPC title

• C08L77/10

  Polyamides derived from aromatically bound amino and carboxyl groups of amino-carboxylic acids or of polyamines and polycarboxylic acids · CPC title

• B32B27/08

  of synthetic resin · CPC title

• B32B27/34

  comprising polyamides · CPC title

• B32B2377/00

  Polyamides · CPC title