Photothermal reactive diluent

Abstract

The objective of this invention is to provide a diluent that can adjust the elastic modulus of a light-cured material in a curing system that can combine light curing and thermo curing. This invention is a mixture comprising: a compound (A) each containing one or more isocyanate groups and vinyl unsaturated groups, and a carboxylic anhydride (B) containing vinyl unsaturated groups, wherein the carboxylic anhydride (B) comprises 0.001 to 10% by mass of the aforementioned carboxylic anhydride (B) relative to 100% by mass of the total of the aforementioned compound (A) and the aforementioned carboxylic anhydride (B).

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