RE-RELEASABLE ADHESIVE COMPOSITION, RE-RELEASABLE ADHESIVE LAYER, PRESSURE-SENSITIVE ADHESIVE SHEE

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PROBLEM TO BE SOLVED : To provide a re-releasable adhesive composition which is excellent in re-releasability and recovery of the contact angle and is suitably used for a surface-protection material for an adherend having a photocatalyst layer, and to provide a re-releasable adhesive composition excellent in weather resistance as well as in the above characteristics. SOLUTION : The re-releasable adhesive composition used for the surface-protection material for the adherend having the photocatalyst layer comprises 100 pts.wt. (meth)acrylic polymer and (D) 0.01-30 pts.wt. surfactant having a molecular weight of 150-5, 000, wherein the (meth)acrylic polymer comprises, as monomer units, (A) 50-99.9 wt% at least one acrylate monomer of formula (1) : CH2=CR1COOR2 (wherein R1 is a hydrogen atom or a methyl group; and R2 is a 2-14C alkyl group), (B) 0.1-10 wt% functional group-containing vinyl monomer and (C) 0-49.9 wt% vinyl monomer copolymerizable with monomers (A) and/or (B). COPYRIGHT : (C)2006, JPO&NCIPI