| 摘要 |
<p>An emulsion-type pressure sensitive adhesive characterized in that it is one obtained by (co)polymerization of main monomers with the use of, as a protective colloid, an acrylic copolymer of 500 to 50,000 weight average molecular weight, the acrylic copolymer obtained by copolymerization of at least one hydrophilic monomer (A) selected from the group consisting of (meth)acrylamide, hydroxyethyl (meth)acrylate and (meth)acrylic acid and a (meth)acrylic acid alkyl ester (B) whose alkyl has 4 to 18 carbon atoms used in a weight ratio of 40 to 70 : 60 to 30, or obtained by copolymerization of monomer (A), monomer (B) and a third monomer (C) of acrylonitrile and/or styrene used in a weight ratio of (A) : [(B)+(C)] of 40 to 70 : 60 to 30 and further a weight ratio of (B) : (C) of 99.9 to 20 : 0.1 to 80. There is further provided a process for producing this emulsion-type pressure sensitive adhesive.</p> |
