| 摘要 |
PROBLEM TO BE SOLVED: To provide a one-pack type removable aqueous adhesive composition having excellent adhesive power, holding power, and peel strength under constant load, hardly increasing the adhesive power with time, hardly leaving the adhesive paste and stain after removal, and hardly changing adhesive properties with time; and to provide a decoration sheet using the adhesive composition. SOLUTION: The removable aqueous adhesive composition contains [A] an emulsion comprising the following acrylic resin and having <70 wt% gel fraction, [B] a hydrazine-based compound and [C] a phosphoric acid-based compound. The acrylic resin is obtained by subjecting a monomer mixture comprising (a1) 50-99.89 wt% alkyl ester of (meth)acrylic acid containing 4-12C alkyl group, (a2) 0.1-10 wt% carboxy group-containing unsaturated monomer, (a3) 0.01-10 wt% carbonyl group-containing unsaturated monomer and (a4) 0-49.89 wt% other unsaturated monomers to an emulsion polymerization in the presence of an anion-type reactive emulsifier, and has >-50°C and≤-25°C glass transition temperature. The decoration sheet is obtained by using the composition as an adhesive layer. COPYRIGHT: (C)2006,JPO&NCIPI
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