Transparent resin laminate and touch screen panel including the same

Patent metadata

Field	Value
Publication number	US-9857927-B2
Application number	US-201314759649-A
Country	US
Kind code	B2
Filing date	Nov 12, 2013
Priority date	Jan 9, 2013
Publication date	Jan 2, 2018
Grant date	Jan 2, 2018

Abstract

A transparent resin laminate includes: a high-hardness hard coating layer having a pencil hardness of 6H to 8H; a transparent (meth)acrylic resin layer; and an impact resistant hard coating layer including a urethane bond-containing acrylic resin.

First claim

The invention claimed is:

1. A transparent resin laminate, sequentially comprising:
a high-hardness hard coating layer having a pencil hardness of 6H to 8H;
a transparent (meth)acrylic resin layer; and
an impact resistant hard coating layer comprising a urethane bond-containing acrylic resin,
wherein the urethane bond-containing acrylic resin is formed by heat-curing a mixture comprising a hydroxyl group-containing acrylic monomer and a polyisocyanate oligomer having a weight average molecular weight of 1,000 to 15,000, and
wherein the mixture comprises 70 wt % to 95 wt % of the hydroxyl group-containing acrylic monomer, and 5 wt % to 30 wt % of the polyisocyanate oligomer.

2. The transparent resin laminate according to claim 1 , wherein the polyisocyanate oligomer is an isophorone-based polyisocyanate oligomer.

3. The transparent resin laminate according to claim 1 , wherein the impact resistant hard coating layer is formed by photo-curing the urethane bond-containing acrylic resin having an acrylic double bond at an end as being tri-functional or tetra-functional.

4. The transparent resin laminate according to claim 1 , wherein the impact resistant hard coating layer has a pencil hardness of 4H to 5H.

5. The transparent resin laminate according to claim 1 , wherein a ratio of a thickness of the high-hardness hard coating layer to a thickness of the impact resistant hard coating layer ranges from 1:1.2 to 1:1.5.

6. The transparent resin laminate according to claim 1 , wherein the high-hardness hard coating layer has a thickness of 5 μm to 12 μm.

7. The transparent resin laminate according to claim 1 , wherein the transparent (meth)acrylic resin layer has a thickness of 0.5 mm to 1.5 mm.

8. The transparent resin laminate according to claim 1 , wherein the impact resistant hard coating layer has a thickness of 7 μm to 16 μm.

9. The transparent resin laminate according to claim 1 , wherein the high-hardness hard coating layer comprises at least one selected from a group consisting of an acrylic compound, an epoxy compound, a silicon compound and a combination thereof.

10. The transparent resin laminate according to claim 1 , wherein the transparent (meth)acrylic resin layer comprises a polymethylmethacrylate resin.

11. The transparent resin laminate according to claim 1 , wherein a light transmissivity of the transparent resin laminate ranges from 90% to 100%.

12. A touch screen panel comprising the transparent resin laminate according to claim 1 as a cover sheet,
wherein the high-hardness hard coating layer is stacked so as to face the outside.

13. The touch screen panel according to claim 12 , wherein a conductive plastic film with a conductive layer formed on one surface, an adhesive film, and the transparent resin laminate are sequentially stacked.

14. The touch screen panel according to claim 13 , wherein the transparent resin laminate is stacked in a direction in which the adhesive film and the impact resistant hard coating layer contact with each other.

15. The touch screen panel according to claim 13 , wherein the conductive plastic film is a transparent plastic film with an indium tin oxide (ITO) electrode layer formed on one surface.

Assignees

• Lg Hausys Ltd

Inventors

• Hwang Deok Ryul
• Park Ku Il
• Yue Seong Hoon
• Lee Jong Hun
• Lee Min Hee
• Shin Chang Hak
• Park Hwan Seok
• Song Yea Ri

Classifications

• Y10T428/269

  including synthetic resin or polymer layer or component · CPC title

• C08J7/042

  with two or more layers, where at least one layer of a composition contains a polymer binder · CPC title

• C08J2433/08

  Homopolymers or copolymers of acrylic acid esters · CPC title

• Y10T428/2495

  Thickness [relative or absolute] · CPC title

• G06F3/041 Primary

  Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means · CPC title