WATER DISPERSION TYPE ACRYLIC PRESSURE-SENSITIVE ADHESIVE AND ADHESIVE TAPE

摘要

PROBLEM TO BE SOLVED: To obtain both a water dispersion type pressure-sensitive adhesive using a small amount of an emulsifying agent and having a high solid content and an adhesive tape using the same. SOLUTION: This water dispersion type acrylic pressure-sensitive adhesive is obtained by an aqueous emulsion polymerization using 100 pts.wt. of a monomer mixture composed of at least a (meth)acrylic acid alkyl ester and a functional group-containing vinyl-based monomer copolymerizable with the (meth) acrylic acid alkyl ester, 0.2-1 pt.wt. of an emulsifying agent and a polymerization initiator and has the ratio (A/B) of particle diameter A measured by a light scattering type grain size distribution meter to particle diameter B measured by a transmission type electron microscope of >=1.8. The adhesive tape is obtained by using this water dispersion type acrylic pressure-sensitive adhesive.