Soken & Chemical & Engineering Co., Ltd.

Mitsuhiko Nakazawa

Youichi Takizawa

An adhesive composition includes 100 parts by weight of (a) a (meth)acrylic monomer and 10 to 400 parts by weight of (b) a (meth)acrylic polymer, wherein the weight-average molecular weight of the (meth)acrylic polymer (b) in terms of standard polystyrene, as measured by GPC, is in the range of 50,000 to 800,000, and the (meth)acrylic polymer (b) has 0.3 to 1 end group represented by the formula (1) based on one polymer chain. 

Adhesive composition comprising end-reactive acrylic polymer and uses thereof

An acrylic pressure sensitive adhesive composition comprising 5 to 75 parts by weight of an adherent polymer (a) comprising (meth)acrylic ester component units as principal structural units and having a weight average molecular weight of 50,000 or more; 5 to 40 parts by weight of a tackifier resin (b) comprising (meth)acrylic ester component units as principal structural units and having a weight average molecular weight of 20,000 or less; and 20 to 90 parts by weight of monomers (c) whose principal component is a (meth)acrylic ester, wherein substantially no solvent is contained is provided. Further, a pressure sensitive adhesive tape having a pressure sensitive adhesive layer superimposed on a support surface is provided by coating the support surface with the above acrylic pressure sensitive adhesive composition, which contain a partial polymerizate, and carrying out a polymerization reaction on the support surface.

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Sayama, Japan

Mitsuhiko Nakazawa