Patent ID: 8377623

Claim:
A photocurable composition comprising: (a) 35-80% by weight of a cationically curable component comprising a polyglycidyl epoxy compound; (b) 15-60% by weight of a free radically active component comprising an ethoxylated and/or propoxylated poly(meth)acrylate; (c) 0.1-10% by weight of an antimony-free cationic photoinitiator; (d) 0.01-10% by weight of a free radical photoinitiator; and (e) 0-40% by weight of one or more optional components wherein the percent by weight is based on the total weight of the photocurable composition, wherein the photocurable composition has no antimony content, wherein the cationically curable component and free radically active component produce a C:H:O ratio of at least 3.0:3.75:1, and wherein the photocurable composition, after cure, is clear and has a yellowness index/inch thickness of less than 70 and a flexural modulus of at least 1000 MPa.