Adhesive resin laminate, laminate, and method of producing same

Patent metadata

Field	Value
Publication number	US-10723923-B2
Application number	US-202016780914-A
Country	US
Kind code	B2
Filing date	Feb 4, 2020
Priority date	Feb 16, 2017
Publication date	Jul 28, 2020
Grant date	Jul 28, 2020

Abstract

Provided are an adhesive resin laminate having an excellent adhesive force to two adherends, a laminate in which this adhesive resin laminate is laminated with two adherends, and a method of producing them. An adhesive resin laminate having at least a first adhesive layer and a second adhesive layer, in which the first adhesive layer includes a base resin and a crosslinking agent, the base resin is a modified polyolefin resin, the crosslinking agent is an epoxy-based compound, the second adhesive layer includes a polyolefin-based resin, and the first adhesive layer has a viscoelastic modulus measurement value E (150) at 150° C. of 1.0×10 4 Pa or more and 1.0×10 8 Pa or less.

First claim

What is claimed is:

1. A method of producing an adhesive resin laminate having at least a first adhesive layer and a second adhesive layer,
wherein said first adhesive layer comprises a base resin and a crosslinking agent, said base resin is a modified polyolefin resin and said crosslinking agent is an epoxy-based compound, said second adhesive layer comprises a polyolefin-based resin, and said first adhesive layer has a viscoelastic modulus measurement value E (150) at 150° C. of 1.0×10 4 Pa or more and 1.0×10 8 Pa or less,
the method comprising:
(1) a step of dissolving said modified polyolefin resin and said epoxy-based compound in a solvent to produce a coating liquid;
(2) a step of coating said coating liquid on a substrate film and drying the coating liquid to produce said first adhesive layer;
(3) a step of obtaining said second adhesive layer having a film shape by extrusion molding;
(4) a step of laminating said first adhesive layer on said substrate film and said second adhesive layer; and
(5) a step of peeling said substrate film to obtain said adhesive resin laminate, in this order.

2. A method of producing a laminate comprising an adhesive resin laminate having at least a first adhesive layer and a second adhesive layer; and first and second adherends, said adhesive resin laminate and said first and second adherends being laminated in an order of the first adherend, said first adhesive layer of said adhesive resin laminate, said second adhesive layer of said adhesive resin laminate, and the second adherend,
wherein said first adhesive layer comprises a base resin and a crosslinking agent, said base resin is a modified polyolefin resin and said crosslinking agent is an epoxy-based compound, said second adhesive layer comprises a polyolefin-based resin, and said first adhesive layer has a viscoelastic modulus measurement value E (150) at 150° C. of 1.0×10 4 Pa or more and 1.0×10 8 Pa or less,
the method comprising:
(1) a first step of laminating said first adherend and said first adhesive layer and heat-pressing said first adherend and said first adhesive layer to laminate said first adherend and said adhesive resin laminate; and
(2) a step of laminating said second adherend and said second adhesive layer and heat-pressing said second adherend and said second adhesive layer at a temperature higher than a temperature in said first step by 30° C. or more to laminate said second adherend and said adhesive resin laminate, in this order.

Assignees

• Fujimori Kogyo Co Ltd

Inventors

• Takeda Toshiyuki
• Takahashi Nagako

Classifications

• C09J2301/208

  the adhesive layer being constituted by at least two or more adjacent or superposed adhesive layers, e.g. multilayer adhesive · CPC title

• C09J2301/1242

  the opposite adhesive layers being different · CPC title

• C09J2301/312

  parameters being the characterizing feature · CPC title

• B32B27/32

  comprising polyolefins {(comprising vinyl (co)polymers or acrylic (co)polymers B32B27/30)} · CPC title

• C09J2463/00

  Presence of epoxy resin · CPC title