RE-PEELABLE AQUEOUS DISPERSION-TYPE ACRYLIC SELF-ADHESIVE COMPOSITION AND SELF-ADHESIVE SHEET

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PROBLEM TO BE SOLVED : To provide a re-peelable aqueous dispersion-type acrylic self-adhesive composition with which it is possible to form a self-adhesive layer that has excellent antistatic performance, self-adhesion properties, re-peelability, peeling stability, resistance to a rise in self-adhesive force, resistance to the formation of marks on an adherend, particularly resistance to the formation of white marks (white mark resistance) occurring on the adherend under high-humidity conditions, and excellent appearance properties. SOLUTION : The re-peelable aqueous dispersion-type acrylic self-adhesive composition is characterized by containing : an acrylic emulsion polymer formed from 70 to 99.5 wt.% of a (meth)acrylic acid alkyl ester and 0.5 to 10 wt.% of a carboxy group-containing unsaturated monomer as the monomer units; an ionic compound; and a polyether-type defoaming agent represented by the following formula (I). (I) HO-(PO)n1-(EO)m1-H. [In formula (I), PO is an oxypropylene group, EO is an oxyethylene group, m1 is an integer of 0 to 40, n1 is an integer of at least 1, and the form of addition of EO or PO is random or block]. COPYRIGHT : (C)2013, JPO&INPIT