PURPOSE: The titled composition having improved adhesiveness and cohesive force without causing reduction in water resistance and problems of environmental hygiene, comprising a bulk material obtained by continuous bulk polymerization of an acrylic monomer and a monomer for addition polymerization as a main component for adhesion.
CONSTITUTION: The titled composition comprising a bulk polymer as a main component of adhesive. The bulk polymer is obtained by polymerizing quickly a polymerization raw material having a viscosity of ≤10 poise at normal temperature, consisting essentially of an acrylic monomer capable of forming a polymer having adhesivity at normal temperature, by a radical polymerization initiator, to increase the viscosity of a polymer, polymerizing the polymer further to give an acrylic polymer having a given conversion, folowed by adding one or more ethylenic unsaturated monomers capable of providing a (co)polymer having a glass transition temperature of ≥273°K to the polymer by addition polymerization. The polymerization is carried out in a reactor having a structure to transfer continuously successively fed contents with renewing the surface of the contents, wherein the whole zone of transportation process is controlled at a given temperature by heating.
IJICHI ICHIROU
SANO KENJI
YONEMORI YOSHITSUGU
| JPS56153327A | 1981-11-27 |