Conductive laminate, and touch panel comprising same

Patent metadata

Field	Value
Publication number	US-10316222-B2
Application number	US-201414532686-A
Country	US
Kind code	B2
Filing date	Nov 4, 2014
Priority date	May 30, 2012
Publication date	Jun 11, 2019
Grant date	Jun 11, 2019

Abstract

The present invention is relates to conductive laminate. The conductive laminate is applied to a touch panel or touch screen, thereby exhibiting excellent durability, and a pressure-sensitive adhesive layer included in the conductive laminate may prevent a change in resistance of a conductive layer, and effectively inhibit lift-off or peeling, or generation of bubbles at a pressure-sensitive adhesive interface. As a result, performances of the touch panel or touch screen including the conductive laminate may be stably maintained for a long time.

First claim

The invention claimed is:

1. A conductive laminate, comprising:
a substrate layer;
a pressure-sensitive adhesive layer formed on one or both surfaces of the substrate layer; and
a conductive layer present between the substrate layer and the pressure-sensitive adhesive layer,
wherein the pressure-sensitive adhesive layer is formed from a pressure-sensitive adhesive composition comprising 100 parts by weight of a pressure-sensitive adhesive polymer, and 0.1 to 35 parts by weight of a polymerized product of a monomer mixture comprising a thiol compound,
wherein the thiol compound and the monomer mixture constitute the polymerized product,
wherein the polymerized product has a weight average molecular weight of 1,000 to 200,000,
wherein the conductive layer has a resistance change rate of 10% or less, and
wherein the thiol compound is a compound of Formula 1:
H—S—R  [Formula 1]

where R is an unsubstituted alkyl group or an alkyl group substituted with at least one substituent selected from the group consisting of a thiol group, a hydroxyl group and an oxyranyl group, or a substituent of Formula 2,

where A is an alkylene group, R a is hydrogen, an alkyl group, or -L 1 -C(-L 2 -O—C(═O)-L 3 -SH) n R (3-n) , in which L 1 to L 3 are each independently an alkylene group, R is hydrogen or an alkyl group, and n is a number from 1 to 3.

2. The conductive laminate of claim 1 , further comprising a metal mesh layer present between the substrate layer and the pressure-sensitive adhesive layer.

3. The conductive laminate of claim 2 , wherein the metal mesh layer comprises silver, copper or an alloy thereof.

4. The conductive laminate of claim 1 , further comprising a transparent substrate attached to the pressure-sensitive adhesive layer.

5. The conductive laminate of claim 1 , wherein the pressure-sensitive adhesive layer has a peeling strength of 1,900 gf/25 mm or more at a room temperature, relative to a polycarbonate film when the pressure-sensitive adhesive layer is formed on the polycarbonate film.

6. The conductive laminate of claim 1 , wherein the pressure-sensitive adhesive polymer comprises 80 to 99.99 parts by weight of a (meth)acrylic acid ester monomer and 0.01 to 20 parts by weight of a copolymerizable monomer having a crosslinkable functional group.

7. The conductive laminate of claim 6 , wherein the crosslinkable functional group is a hydroxyl group, a carboxyl group, an isocyanate group, a glycidyl group or a derivative thereof.

8. The conductive laminate of claim 1 , wherein the pressure-sensitive adhesive polymer has a weight average molecular weight of 300,000 to 2,000,000.

9. The conductive laminate of claim 1 , wherein the thiol compound is a compound in which R of Formula 1 is an unsubstituted alkyl group having 1 to 20 carbon atoms, an alkyl group having 1 to 20 carbon atoms substituted with a hydroxyl group, or an alkyl group having 1 to 20 carbon atoms substituted with an oxyranyl group.

10. The conductive laminate of claim 1 , wherein the monomer mixture comprises 0.01 to 10 parts by weight of a thiol compound, relative to 100 parts by weight of the monomer.

11. The conductive laminate of claim 1 , wherein the monomer mixture comprises a (meth)acrylic acid ester monomer.

12. The conductive laminate of claim 1 , wherein the monomer mixture comprises a copolymerizable monomer having a crosslinkable functional group.

13. The conductive laminate of claim 1 , wherein the pressure sensitive adhesive composition further comprises a multifunctional crosslinking agent at 0.01 to 10 parts by weight, relative to 100 parts by weight of the pressure-sensitive adhesive polymer.

14. A touch panel, comprising the conductive laminate of claim 1 .

Assignees

• Lg Chemical Ltd

Inventors

• Park Min Soo
• Yang Se Woo
• Chang Suk Ky

Classifications

• C09J2203/318

  for the production of liquid crystal displays · CPC title

• C09J175/04

  Polyurethanes · CPC title

• C08G18/8029

  Masked aromatic polyisocyanates · CPC title

• C08K5/37

  Thiols · CPC title

• Y10T428/2848

  Three or more layers · CPC title