PURPOSE: To obtain a composition not requiring pretreatment with an etching agent, having excellent adhesiveness, comprising a specific urethane prepolymer, specific silane compound, specific radically polymerizable unsaturated monomer and a specific polymerization initiator as main components.
CONSTITUTION: The aimed composition comprising (A) one or more urethane prepolymer preferably containing isocyanate groups at both ends, having 400-50,000 molecular weight, (B) an isocyanate group-containing silane compound preferably consisting of vinylsilyl triisocyanate, γ-methacryloxypropylsilyl isocyanate, etc., (C) one or more radically polymerizable unsaturated monomers preferably consisting of trimethylolpropane triacrylate, 1,6-hexanediol di(meth) acrylate, etc., and (D) a redox polymerization initiator or photopolymerization initiator as main components.
ISHITA HITOSHI
MAKINO TAKAYUKI
SHIN JUNKO
