REMOVABLE ADHESIVE COMPOSITION, REMOVABLE ADHESIVE LAYER, ADHESIVE SHEET, AND SURFACE PROTECTIVE MATERIAL

摘要

Disclosed is a removable adhesive composition for use as a surface protective material for an adherend having a photocatalytic layer, the composition comprising: 100 parts by weight of a (meth)acrylic polymer comprising (A) 50 to 99.9 wt% of at least one acrylate monomer represented by the general formula (1): CH2=CR1 COOR2 (wherein R1 represents a hydrogen atom or a methyl group, R2 represents an alkyl group having 2 to 14 carbon atoms), (B) 0.1 to 10 wt% of a vinyl monomer having a functional group therein and (C) 0 to 49.9 wt% of a vinyl monomer which is copolymerizable with the components (A) and/or (B); and (D) 0.01 to 30 parts by weight of a surfactant having a molecular weight of 150 to 5000. The removable adhesive composition is excellent in removability and contact angle-recovery properties and is therefore suitable for use as a surface protective material for an adherent having a photocatalytic layer. Based on this composition, it is possible to prepare a removable adhesive composition having excellent weather resistance as well as the above properties.