Adhesive composition and thermally adhesive member using same

Patent metadata

Field	Value
Publication number	US-9309373-B2
Application number	US-201113996858-A
Country	US
Kind code	B2
Filing date	Dec 2, 2011
Priority date	Dec 28, 2010
Publication date	Apr 12, 2016
Grant date	Apr 12, 2016

Abstract

Provided is an adhesive composition leading to sufficient adhesive strength when used for bonding to a polyolefin resin molded article that bonds poorly with other members. Also provided is an adhesive composition having excellent heat resistance (heat resistant adhesion) in the bonded part of a composite body obtained by joining a polyolefin resin-formed body and other member. This adhesive composition contains an organic solvent, a carboxyl group-containing polyolefin resin which is dissolved in this organic solvent and which has a melt flow rate of 5 to 40 g/10 min when measured at 130° C., and a polyfunctional isocyanate compound. This adhesive composition may further contain a carboxyl group-containing polyolefin resin having a melting point of 120° C. to 170° C.

First claim

What is claimed is:

1. An adhesive composition, comprising:
an organic solvent,
a polyolefin resin A that is dissolved in the organic solvent, and
a polyfunctional isocyanate compound,
wherein the polyolefin resin A has a melt flow rate measured at 130° C. of 5 to 40 g/10 min, and comprises a carboxyl group, and
wherein the polyolefin resin A has a melting point of 84° C. to 90° C.

2. The adhesive composition according to claim 1 , wherein a content of the carboxyl group in the polyolefin resin A is in a range of from 0.01 to 2.0 mmol based on 1 g of the polyolefin resin A.

3. The adhesive composition according to claim 2 , further comprising a polyolefin resin B that has a melting point of from 120° C. to 170° C., and comprises a carboxyl group.

4. The adhesive composition according to claim 3 , wherein a content of the carboxyl group in the polyolefin resin B is in a range of from 0.01 to 2.0 mmol based on 1 g of the polyolefin resin B.

5. The adhesive composition according to claim 3 , wherein the polyolefin resin B is insoluble in the organic solvent, and an average particle size of the polyolefin resin B is of from 1 to 50 μm.

6. The adhesive composition according to claim 3 , wherein a content of the polyolefin resin A and a content of the polyolefin resin B are respectively 1% to 70% by mass and 30% to 99% by mass based on 100% by mass of a total amount of the polyolefin resin A and the polyolefin resin B.

7. The adhesive composition according to claim 1 , further comprising a polyolefin resin B that has a melting point of from 120° C. to 170° C., and comprises a carboxyl group.

8. The adhesive composition according to claim 7 , wherein a content of the carboxyl group in the polyolefin resin B is from 0.01 to 2.0 mmol based on 1 g of the polyolefin resin B.

9. The adhesive composition according claim 7 , wherein the polyolefin resin B is insoluble in the organic solvent and has an average particle size of from 1 to 50 μm.

10. The adhesive composition according to claim 7 , wherein a content of the polyolefin resin A and a content of the polyolefin resin B are respectively 1% to 70% by mass and 30% to 99% by mass based on 100% by mass of a total amount of the polyolefin resin A and the polyolefin resin B.

11. A thermally adhesive member comprising an adhesive layer obtained by a process comprising curing the adhesive composition according to claim 1 , wherein a metal layer is bonded to one side of the adhesive layer, and a thermally adhesive resin layer is bonded to the other side of the adhesive layer.

Assignees

• Ito Takahiro
• Imahori Makoto
• Nishio Tatsuo
• Toagosei Co Ltd

Inventors

• Ito Takahiro
• Imahori Makoto
• Nishio Tatsuo

Classifications

• C08L51/06

  grafted on to homopolymers or copolymers of aliphatic hydrocarbons containing only one carbon-to-carbon double bond · CPC title

• C09J7/21

  Paper; Textile fabrics · CPC title

• C09J151/06

  grafted on to homopolymers or copolymers of aliphatic hydrocarbons containing only one carbon-to-carbon double bond · CPC title

• C09J175/04

  Polyurethanes · CPC title

• C08K5/01 Primary

  Hydrocarbons {(C08K5/0091 takes precedence)} · CPC title