To obtain an adhesive for a warming material the adhering force of which is less varied by temperature variation of the warming material and is sufficient both before heat generation and in use, being easily peeled off after use, and to provide the warming material using the same.
The adhesive for sticking and fixing the warming material onto an adherend, contains (1) a copolymer (A) composed of essential component monomers consisting of an aromatic vinyl monomer (a1), an aliphatic or alicyclic unsaturated hydrocarbon (a2) and/or an alkyl or alkenyl (meth)acrylate respectively having a 4-24C alkyl or alkenyl group (a3), and (2) a (co)polymer (B) having a higher glass transition temperature than that of the copolymer (A) by at least 10°C and composed of the monomer of (a1) as essential component. The warming material comprises an adhesive layer consisting of the adhesive.
COPYRIGHT: (C)2004,JPO
Etsuko Tomura
Tetsuya Shimada
Takanori Kawakami
SANYO CHEMICAL INDUSTRIES,LTD.
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