Pressure-sensitive adhesive composition and pressure-sensitive adhesive sheet
AssigneeNitto Denko Corporation
InventorsMasahito Niwa, Masayuki Okamoto
Life of this patent
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Abstract
Provided are a PSA composition capable of forming a PSA having an excellent high-temperature cohesive strength and low-temperature adhesive strength with low corrosiveness to metal; and a PSA sheet formed of the composition. The PSA composition comprises a copolymerization product of a monomer mixture having a composition containing at least an alkyl(meth)acrylate having an alkyl group with 1 to 20 carbon atoms and an oxazoline-group-containing unsaturated monomer (monomer m2). The amount of monomer m2 relative to all monomer components is 1 to 70% by weight.
Claims10
An acrylic pressure-sensitive adhesive composition, comprising a copolymerization product of a monomer mixture, with the monomer mixture satisfying each of the following conditions:
- comprising, as monomer m1, an alkyl(meth)acrylate represented by the following formula (I):
- CH2═C(R1)COOR2 (I)
- wherein R1 is a hydrogen atom or a methyl group and R2 is an alkyl group having 1 to 20 carbon atoms;
- and
- comprising, as monomer m2, an unsaturated monomer containing an oxazoline group in an amount of 1 to 70% by weight of all monomer components.
A method for producing a pressure-sensitive adhesive sheet, comprising:
- (A) preparing a pressure-sensitive adhesive composition by subjecting a monomer mixture to copolymerization reaction, with the monomer mixture satisfying each of the following conditions:
- comprising, as monomer m1, an alkyl(meth)acrylate represented by the following formula (I):
- CH2═C(R1)COOR2 (I)
- wherein R1 is a hydrogen atom or a methyl group and R2 is an alkyl group having 1 to 20 carbon atoms;
- and
- comprising, as monomer m2, an unsaturated monomer containing an oxazoline group in an amount of 1 to 70% by weight of all monomer components;
- (B) applying the pressure-sensitive adhesive composition to a substrate;
- and
- (C) curing the applied pressure-sensitive adhesive composition to form a pressure-sensitive adhesive layer.
Dependencies are inferred from the claim text.