Patent ID: 6974784

Claim:
A photocurable sheet-form material comprising: (a) a polymerizable unsaturated monomer; (b) a polymer which is either polymethyl methacrylate or a polymer consisting mainly of methyl methacrylate units and which is compatible or swollen with the monomer (a), wherein the polymer (b) is produced in a powdered form having a weight average molecular weight of 100,000 or more, and wherein the particle diameter of the polymer (b) is 300 to 5000 Angstroms (Å); (c) a photocuring agent; (d) fibrous reinforcement; and (e) one or more resins selected from a (meth)acrylic polymer, an unsaturated polyester, a vinyl ester, or an urethane acrylate; wherein, the polymerizable unsaturated monomer (a) is an acrylic polymerizable monomer, and has a solubility parameter SP within a range from 8.1 to 10.0, which is calculated in accordance with a formula “SP=Σ(G)/molecular weight” by using molar attraction constants G, a content of the polymer (b) is within a range from 10 to 50 parts by weight, relative to 100 parts by weight of the polymerizable unsaturated monomer (a), and the polymer (b) is produced in an emulsion form by an emulsion polymerization method.