Transfer sheet and hard coat body using same

Patent metadata

Field	Value
Publication number	US-11529798-B2
Application number	US-202017000616-A
Country	US
Kind code	B2
Filing date	Aug 24, 2020
Priority date	Nov 5, 2014
Publication date	Dec 20, 2022
Grant date	Dec 20, 2022

Abstract

The purpose of the present invention is to provide a transfer sheet capable of providing hard coat properties and excellent weather resistance to a resin molded article such as organic glass. The transfer sheet has, in order, a base material film for mold release, a hard coat layer, a primer layer, and an adhesive layer. The weather resistance and adhesiveness of the hard coat layer and the primer layer are improved and hard coat properties and excellent weather resistance can be provided to a resin molded article being the transfer object, as a result of: the hard coat layer being formed from a cured product of a resin composition including a curable resin; and the primer layer being formed from a binder resin including a polyurethane having a mass-average molecular weight of 40,000-100,000 and including 1-30% by mass of an acrylic component.

First claim

The invention claimed is:

1. A transfer sheet comprising: a base material film for releasing, a hard coat layer, a primer layer, and an adhesive layer in this order,
wherein the hard coat layer is formed of a cured product of a resin composition containing a curable resin, and
the primer layer is formed of a binder resin containing polyurethane having a mass average molecular weight of 50,000 to 80,000; the polyurethane being a copolymer consisting of an acrylic component and a urethane component with 5 to 20% by mass of the acrylic component, and
wherein the urethane component is a polycarbonate-based urethane.

2. The transfer sheet according to claim 1 , wherein the curable resin is an ionizing radiation curable resin.

3. The transfer sheet according to claim 1 , wherein the curable resin is a combination of (i) a tri- or more functional ionizing radiation curable resin and (ii) a bifunctional (meth)acrylate monomer.

4. The transfer sheet according to claim 1 , wherein the adhesive layer contains a heat-sensitive adhesive resin or a pressure-sensitive adhesive resin.

5. The transfer sheet according to claim 1 , comprising a colored layer provided in part of one position of between the base material film for releasing and the hard coat layer, between the hard coat layer and the primer layer, between the primer layer and the adhesive layer, and or on a surface of the adhesive layer opposite to the primer layer.

6. The transfer sheet according to claim 2 , wherein the curable resin is a combination of (i) a tri- or more functional ionizing radiation curable resin and (ii) a bifunctional (meth)acrylate monomer.

7. The transfer sheet according to claim 2 , wherein the adhesive layer contains a heat-sensitive adhesive resin or a pressure-sensitive adhesive resin.

8. The transfer sheet according to claim 3 , wherein the adhesive layer contains a heat-sensitive adhesive resin or a pressure-sensitive adhesive resin.

9. The transfer sheet according to claim 2 , comprising a colored layer provided between the base material film for releasing and the hard coat layer, between the hard coat layer and the primer layer, between the primer layer and the adhesive layer, or on a surface of the adhesive layer opposite to the primer layer.

10. The transfer sheet according to claim 3 , comprising a colored layer provided between the base material film for releasing and the hard coat layer, between the hard coat layer and the primer layer, between the primer layer and the adhesive layer, or on a surface of the adhesive layer opposite to the primer layer.

11. The transfer sheet according to claim 4 , comprising a colored layer provided in part of one position of between the base material film for releasing and the hard coat layer, between the hard coat layer and the primer layer, between the primer layer and the adhesive layer, and or on a surface of the adhesive layer reverse opposite to the primer layer.

12. A method for producing a hard coated article, comprising sticking the transfer sheet according to claim 1 to a resin molded article so that the adhesive layer comes into contact with the resin molded article, and then peeling off the base material film for releasing.

13. The method according to claim 12 , wherein the transfer sheet is stuck to a pre-molded resin molded article, and then the base material film for releasing is peeled off.

14. The method according to claim 12 , wherein a resin is injected onto the transfer sheet to integrate the resin with the transfer sheet, and then the base material film for releasing is peeled off.

15. A method for producing a hard coated article, comprising sticking the transfer sheet according to claim 2 to a resin molded article so that the adhesive layer comes into contact with the resin molded article, and then peeling off the base material film for releasing.

16. A method for producing a hard coated article, comprising sticking the transfer sheet according to claim 3 to a resin molded article so that the adhesive layer comes into contact with the resin molded article, and then peeling off the base material film for releasing.

17. A method for producing a hard coated article, comprising sticking the transfer sheet according to claim 4 to a resin molded article so that the adhesive layer comes into contact with the resin molded article, and then peeling off the base material film for releasing.

18. A method for producing a hard coated article, comprising sticking the transfer sheet according to claim 5 to a resin molded article so that the adhesive layer comes into contact with the resin molded article, and then peeling off the base material film for releasing.

Assignees

• Dainippon Printing Co Ltd

Inventors

• Fukuda Shunji
• Tamuki Junichi
• Koyama Keisuke

Classifications

• C09J2433/006

  in the substrate · CPC title

• B32B27/40

  comprising polyurethanes · CPC title

• C09J7/50 Primary

  characterised by a primer layer between the carrier and the adhesive · CPC title

• C09J2433/00

  Presence of (meth)acrylic polymer · CPC title

• C09J201/00

  Adhesives based on unspecified macromolecular compounds · CPC title