PRESSURE-SENSITIVE ADHESIVE COMPOSITION HAVING IMPROVED INITIAL TACK

摘要

The present invention is directed to providing a pressure-sensitive adhesive with good initial tack and good adhesion at low temperature. Generally, the pressure-sensitive adhesive composition comprises (1) a carboxylic group- containing (meth)acrylic tacky polymer having a weight average molecular weight of less than 800,000 and a glass transition temperature of -100° C to -30° C, and (2) an amino group- containing (meth)acrylic non-tacky polymer having a weight average molecular weight of from 30,000 to 100,000 and a glass transition temperature of 20° C to 90° C. The amino group- containing (meth)acrylic non-tacky polymer (2) is present in an amount of no less than 1 parts by mass and less than 20 parts by mass on a basis of 100 parts by mass of said carboxylic group- containing (meth)acrylic tacky polymer (1).