Polymerizable compositions and in-mold cured products using same.

摘要

A polymerizable composition contains unsaturated urethane shown by Formula (1) given below, vinyl monomer which is copolymerizable with this unsaturated urethane, and an inorganic powder filler at weight ratio of (unsaturated urethane)/(vinyl monomer) = 10/90-90/10, the inorganic powder filler being 30-300 weight parts with respect to 100 weight parts of the sum of the unsaturated urethane and vinyl monomer: <CHEM> where X is a residual group obtained by removing isocyanate groups from polyisocyanate; Y is a residual group obtained by removing hydroxyl groups from polyol; R<1> is a residual group obtained by removing hydroxyl group from non-radical polymerizable mono-ol having aliphatic hydrocarbon group with 6-22 carbon atoms; R<2> is H or CH3; and p, q and r are each an integer 1-3 such that 2 </= p + q </= 4 and qr >/= 2. In-mold cured products obtained from such a polymerizable composition have superior external appearance and water-resistance, and their mold shrinkage is small.