| 摘要 |
PROBLEM TO BE SOLVED: To provide an aqueous emulsion self-adhesive having a low shear viscosity, which enables the manufacture of a self-adhesive sheet having a smooth coated surface without causing cissing and contraction of the aqueous emulsion self-adhesive. SOLUTION: The aqueous emulsion self-adhesive comprises an aqueous dispersion obtained by admixing 0.1-10 pts.wt. of a radical-polymerizable surfactant bearing an unsaturated double bond in the molecule with 100 pts.wt. of a mixture of unsaturated monomers composed of (a), (b) and (c) below, emulsion polymerizing the thus-obtained admixture and further adjusting the pH to 6-10 by incorporating aqueous ammonia, and has a low shear viscosity of at least 50 mPa.s and less than 500 mPa.s: (a) 0.1-5 wt.% of a carboxy group-containing unsaturated monomer, (b) 60-99.9 wt.% of an acrylate ester bearing a 4-12C alkyl group, and (c) 0-40 wt.% of other unsaturated monomers.
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