Adhesives and adhesive compositions, adhesive sheets, laminates and devices with adhesive layers

Abstract

To provide an adhesive that can contribute to saving of a petroleum resource by increasing a ratio of an environment-conscious type material, which has both heat resistance and high dielectric constant, is excellent in corrosion resistance, enables high solid content, and has low viscosity, and an adhesive sheet, a laminate and a device with an adhesive layer which use the same.SOLUTION: An adhesive contains only a resin (A) which is a copolymer of a monomer mixture containing each specific amount of a monomer having 2-octyl (meth)acrylate and a hydroxy group, a carboxy group-containing monomer and other monomers, or an adhesive composition contains the resin (A) and a curing agent (B).SELECTED DRAWING: Figure 1

Claims

1. An adhesive comprising only a resin (A) which is a copolymer of monomer mixtures, In a monomer mixture of 100% by mass, 2-octyl (meth)acrylate is present in an amount of 30% by mass or more and less than 99.5% by mass, It contains 0.1% by mass or more and less than 40% by mass of monomers having a hydroxyl group, It does not contain isobornyl (meth)acrylate. An adhesive characterized in that the content of monomers having a carboxyl group in 100% by mass of the monomer mixture is less than 0.5% by mass, the content of other alkyl (meth)acrylate monomers other than 2-octyl (meth)acrylate is 46% by mass or less, and the total content of 2-octyl (meth)acrylate and other alkyl (meth)acrylate monomers is 65% by mass or more and 99.2% by mass or less.

2. The adhesive according to claim 1, characterized in that it has a biomass content of 30% or more.

3. An adhesive composition characterized by comprising the adhesive described in claim 1 and a curing agent (B).

4. The adhesive composition according to claim 3, wherein the curing agent (B) comprises at least one of an isocyanate-based curing agent and an epoxy-based curing agent.

5. The adhesive composition according to claim 3, further characterized by containing a silane coupling agent (C).

6. The adhesive composition according to claim 3, wherein the gel fraction is 40% or more.

7. An adhesive layer characterized by being obtained from the adhesive according to claim 1 or 2, or from the adhesive composition according to any one of claims 3 to 6.

8. An adhesive sheet comprising the adhesive layer and release film described in claim 7.

9. The adhesive sheet according to claim 8, characterized in that the thickness of the release film is less than 200 μm.

10. A laminate comprising the adhesive layer and substrate described in claim 7.

11. A device with an adhesive layer, comprising the adhesive layer and device according to claim 7.

Images