Patent ID: 7923480

Claim:
A photocurable hygroscopic composition comprising: (a) a moisture-reactive organic metal compound, (b) a (meth)acrylate, (c) a carboxyl group-containing polymerizable monomer, and (d) a photopolymerization initiator, wherein the proportion of the moisture-reactive organic metal compound (a) is from 5 to 70 wt % based on the entire composition, and the proportion of the carboxyl group-containing polymerizable monomer (c) is from 0.1 to 50 mol % based on the moisture-reactive organic metal compound (a), wherein said moisture-reactive organic metal compound (a) is a metal alkoxide represented by the following formula: M(OR) n wherein M is Al, B, Ti or Zr, R is an alkyl group, an alkenyl group, an aryl group, a cycloalkyl group, a heterocyclic group or an acyl group, and n is the valence of M.