# US 2018/0022971 A1 · Adhesive resin layer and adhesive resin film

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- Number: US 2018/0022971 A1
- Document ID: US20180022971A1
- Status: Published application
- Kind: A1
- Application number: 15/548,307
- Filed: 2016-02-29
- Published: 2018-01-25
- Earliest claimed: 2015-05-18
- Assignees: Fujimori Kogyo Co., Ltd.
- Applicants: Fujimori Kogyo Co., Ltd.
- Inventors: Shiro FUJITA; Atsushi SUZUKI; Hiroto NIIMI
- Web page: https://patentgrep.com/patent/US20180022971A1

## CPC

- C09J 133/00: Adhesives based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides, or nitriles thereof; Adhesives based on derivatives of such polymers
- B32B 27/308: {comprising acrylic (co)polymers}
- B32B 27/40: comprising polyurethanes
- C09J 7/10: without carriers
- C09J 7/30: characterised by the adhesive composition
- C09J 175/14: Polyurethanes having carbon-to-carbon unsaturated bonds
- B32B 2307/412: Transparent
- C09J 2203/326: for bonding electronic components such as wafers, chips or semiconductors
- C09J 2433/00: Presence of (meth)acrylic polymer
- C09J 2475/00: Presence of polyurethane
- C09J: ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES (preparation of glue or gelatine C09H)
- B32B: LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM

## Abstract

The present invention provides an adhesive resin layer and an adhesive resin film which can prevent generation of air bubbles even when adhered to a substrate having a high level difference, and in which even after thermal endurance and after wet thermal endurance, of a laminate obtained by laminating a substrate, an adhesive resin layer, and a substrate in an order, air bubbles are not generated, durability is good, and transparency can be maintained. More specifically, the present invention is a monolayered adhesive resin layer comprising an acrylic-based adhesive resin composition having transparency, wherein the adhesive resin composition contains an acrylic-based polymer, urethane acrylate, and a thermopolymerization initiator, and may optionally contain an acrylic-based monomer, and an adhesive resin layer has pressure sensitive adhesiveness on both surfaces at an ambient temperature, and can be thermally cured by heating at a temperature of 100 to 250° C. and a time of 30 seconds to 10 minutes.

## Claims

### Claim 1

A monolayered adhesive resin layer comprising an acrylic-based adhesive resin composition having transparency, wherein
said adhesive resin composition contains at least (A) an acrylic-based polymer, (B) urethane acrylate, and (C) a thermopolymerization initiator, and
said adhesive resin layer has pressure sensitive adhesiveness on both surfaces at an ambient temperature, and can be thermally cured by heating at a temperature of 100 to 250° C. and a time of 30 seconds to 10 minutes.

### Claim 2 (depends on 1)

The adhesive resin layer according to claim 1, wherein an addition amount of said (B) urethane acrylate is 2 to 50 parts by weight based on 100 parts by weight of said (A) acrylic-based polymer.

### Claim 3 (depends on 1)

The adhesive resin layer according to claim 1, wherein said thermopolymerization initiator is a peroxide.

### Claim 4 (depends on 3)

The adhesive resin layer according to claim 3, wherein a temperature at which said peroxide has a half-life of 1 minute is 100° C. or higher.

### Claim 5 (depends on 1)

The adhesive resin layer according to claim 1, wherein said (A) acrylic-based polymer is an acrylic-based polymer which is crosslinked with a curing agent.

### Claim 6 (depends on 5)

The adhesive resin layer according to claim 5, wherein said curing agent comprises at least one kind of an isocyanate-based compound or an epoxy-based compound.

### Claim 7 (depends on 1)

The adhesive resin layer according to claim 1, wherein said adhesive resin composition contains (D) an acrylic-based monomer other than said (B) urethane acrylate.

### Claim 8 (depends on 1)

An adhesive resin film comprising the adhesive resin layer according to claim 1 laminated between two separators.