Acrylic pressure-sensitive adhesive composition, acrylic pressure-sensitive adhesive layer, and acrylic pressure-sensitive adhesive tape
AssigneeNitto Denko Corporation
InventorsKiyoe Shigetomi, Masayuki Okamoto, Masato Yamagata, Jun Akiyama
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Abstract
An acrylic pressure-sensitive adhesive composition contains 100 parts by mass of an acrylic polymer (A), 1 to 70 parts by mass of a (meth)acrylic polymer (B) having a weight average molecular weight (Mw) of 1000≦Mw<30000, and 1 to 50 parts by mass of a hydrogenated tackifying resin (C). The (meth)acrylic polymer (B) is a polymer having a weight average molecular weight smaller than that of the acrylic polymer (A) as a pressure-sensitive adhesive composition, and functions as a tackifying resin along with the hydrogenated tackifying resin (C).
Claims12
An acrylic pressure-sensitive adhesive composition, comprising:
- 100 parts by mass of an acrylic polymer (A);
- 1 to 70 parts by mass of a (meth)acrylic polymer (B) having a weight average molecular weight (Mw) of 1000≦Mw<30000;
- and
- 1 to 50 parts by mass of a hydrogenated tackifying resin (C),
- wherein the glass transition temperature (Tg) of the (meth)acrylic polymer (B) is 0° C.≦Tg≦300° C, and
- wherein the ratio of the (meth)acrylic polymer (B)/the hydrogenated tackifying resin (C) is from 1/1.7 to 1/0.12.
Dependencies are inferred from the claim text.