Polymer film

Patent metadata

Field	Value
Publication number	US-10315462-B2
Application number	US-201414898497-A
Country	US
Kind code	B2
Filing date	Jun 27, 2014
Priority date	Jun 28, 2013
Publication date	Jun 11, 2019
Grant date	Jun 11, 2019

Abstract

This disclosure relates to a polymer film including: a base film including polyamide-based resin including two or more different kinds of repeat units; and a copolymer including polyamide-based segments and polyether-based segments.

First claim

What is claimed is:

1. A polymer film comprising: a base film comprising a polyamide-based resin comprising two or more different kinds of repeat units; and a copolymer comprising polyamide-based segments and polyether-based segments,
wherein the polyamide-based resin includes a repeat unit of the following Chemical Formula 1 and 0.5 wt % to 20 wt % of a repeat units of the following Chemical Formula 2:

wherein, in Chemical Formula 2, R 1 is a linear or branched alkylene group having 2 to 4 carbon atoms.

2. The polymer film according to claim 1 , wherein the polymer film is used as a tire inner liner.

3. The polymer film according to claim 1 , wherein the polyamide-based resin further comprises a repeat unit of the following Chemical Formula 3:

wherein, in Chemical Formula 3,
R 2 is a linear or branched alkylene group having 1 to 20 carbon atoms, and
R 3 is a linear or branched alkylene group having 1 to 20 carbon atoms, an arylene group having 6 to 20 carbon atoms, or a linear or branched arylalkylene group having 7 to 20 carbon atoms.

4. The polymer film according to claim 3 , wherein the polyamide-based resin comprises 0.5 wt % to 20 wt % of the repeat units of Chemical Formula 3.

5. The polymer film according to claim 1 , wherein the polyamide-based copolymer has a relative viscosity (96% sulfuric acid solution) of 3.0 to 4.0.

6. The polymer film according to claim 1 , wherein the copolymer comprising polyamide-based segments, polyether-based segments, and polyamide-based resin form a crosslink.

7. The polymer film according to claim 1 , wherein the content of the polyether-based segments in the base film is 2 wt % to 40 wt %.

8. The polymer film according to claim 1 , wherein the content of the polyether-based segments in the base film is 4 wt % to 20 wt %.

9. The polymer film according to claim 1 , wherein the copolymer comprising polyamide-based segments and polyether-based segments has a weight average molecular weight of 50,000 to 300,000.

10. The polymer film according to claim 1 , wherein the basic unit of the polyether-based segment has a weight average molecular weight of 500 to 10,000.

11. The polymer film according to claim 1 , wherein the base film has a thickness of 30 μm to 300 μm.

12. The polymer film according to claim 1 , wherein the base film further comprises a nylon 6 resin.

13. The polymer film according to claim 1 , further comprising an adhesive layer that is formed at at least one side of the base film and that comprises a resorcinol-formalin-latex (RFL)-based adhesive.

14. The polymer film according to claim 13 , wherein the adhesive layer has a thickness of 0.1 μm to 20 μm.

15. A pneumatic tire comprising the polymer film of claim 1 as an inner liner.

Assignees

• Kolon Inc

Inventors

• Kim Yun-Jo
• Kim Si-Min
• Kim Dong-Jin

Classifications

• C09J7/25

  based on macromolecular compounds obtained otherwise than by reactions involving only carbon-to-carbon unsaturated bonds · CPC title

• B60C5/001

  filled with gas other than air · CPC title

• C09J2471/006

  in the substrate · CPC title

• C08J2377/12

  Polyester-amides · CPC title

• C09J161/12

  with polyhydric phenols · CPC title