Reactive hot-melt adhesive composition

Patent metadata

Field	Value
Publication number	US-10358586-B2
Application number	US-201515323071-A
Country	US
Kind code	B2
Filing date	May 26, 2015
Priority date	Jul 2, 2014
Publication date	Jul 23, 2019
Grant date	Jul 23, 2019

Abstract

A reactive hot-melt adhesive composition of the present technology is moisture curable and contains: a urethane prepolymer having an isocyanate group; a (meth)acrylic resin; and a liquid polymer containing (meth)acryloyloxy groups and/or isocyanate groups.

First claim

The invention claimed is:

1. A reactive hot-melt adhesive composition that is moisture curable,
the reactive hot-melt adhesive composition comprising:
a urethane prepolymer having an isocyanate group;
a (meth)acrylic resin; and
a liquid polymer containing (meth)acryloyloxy groups.

2. The reactive hot-melt adhesive composition according to claim 1 , wherein an amount of the liquid polymer is from 1 to 5 parts by mass per 100 parts by mass total of the (meth)acrylic resin and a polyol and a polyisocyanate that are used in production of the urethane prepolymer.

3. The reactive hot-melt adhesive composition according to claim 1 , wherein the urethane prepolymer is a compound produced by reacting at least one selected from the group consisting of bifunctional polyols and trifunctional polyols with polyisocyanate; and
the bifunctional polyol is at least one type selected from the group consisting of polyoxypropylene diols, polyoxyethylene diols, and castor oil-based polyols.

4. The reactive hot-melt adhesive composition according to claim 3 , wherein a weight average molecular weight of the trifunctional polyol is 5,000 or greater.

5. The reactive hot-melt adhesive composition according to claim 4 , wherein an amount of the trifunctional polyol is from 5 to 50 mass % relative to a total amount of polyol used in production of the urethane prepolymer.

6. The reactive hot-melt adhesive composition according to claim 3 , wherein an amount of the trifunctional polyol is from 5 to 50 mass % relative to a total amount of polyol used in production of the urethane prepolymer.

7. The reactive hot-melt adhesive composition according to claim 2 , wherein the urethane prepolymer is a compound produced by reacting at least one selected from the group consisting of bifunctional polyols and trifunctional polyols with polyisocyanate; and
the bifunctional polyol is at least one type selected from the group consisting of polyoxypropylene diols, polyoxyethylene diols, and castor oil-based polyols.

8. The reactive hot-melt adhesive composition according to claim 7 , wherein a weight average molecular weight of the trifunctional polyol is 5,000 or greater.

9. The reactive hot-melt adhesive composition according to claim 8 , wherein an amount of the trifunctional polyol is from 5 to 50 mass % relative to a total amount of polyol used in production of the urethane prepolymer.

10. The reactive hot-melt adhesive composition according to claim 7 , wherein an amount of the trifunctional polyol is from 5 to 50 mass % relative to a total amount of polyol used in production of the urethane prepolymer.

11. The reactive hot-melt adhesive composition according to claim 1 , wherein the liquid polymer further contains isocyanate groups.

Assignees

• Yokohama Rubber Co Ltd

Inventors

• Matsumura Misaki

Classifications

• C09J175/08 Primary

  from polyethers · CPC title

• C09J175/06

  from polyesters · CPC title

• C09J175/04 Primary

  Polyurethanes · CPC title

• C09J133/04

  Homopolymers or copolymers of esters {(C09J143/04 takes precedence)} · CPC title

• C08L101/08

  Carboxyl groups · CPC title