| 摘要 |
PROBLEM TO BE SOLVED: To provide a prepolymer and a photocurable resin composition which extremely reduce the amount of a reaction terminator and a photopolymerization initiator in the photocurable resin composition and lower the viscosity. SOLUTION: The prepolymer has a carbon-carbon double bond and a mercapto group to be obtained by previously polymerizing (1) a polyene and (2) a polythiol. Preferably, the prepolymer has a viscosity of <=40,000 mPa.s and a metallic ion content of <=50 ppm. The prepolymer may further contain a reaction terminator. The photocurable resin composition contains the prepolymer and (3) a photopolymerization initiator. |
