| 摘要 |
PURPOSE: To obtain a resin which can give a three-dimensional molding excellent in mechanical and thermal properties and dimensional accuracy by mixing a specific short-chain unsaturated urethane, a specific long-chain unsaturated urethane, and a vinyl monomer in a specific proportion. CONSTITUTION: The resin comprises a short-chain unsaturated urethane (A) represented by formula I, a long-chain unsaturated urethane (B) represented by formula II, III, or IV, and a vinyl monomer (C). In the formulae, X is the residue formed from a diisocyanate by removing the isocyanate groups; Z<1> is the residue formed from a urethane di- or triisocyanate by removing the isocyanate groups; Z<2> is the residue formed from a polyurethane di- or triisocyanate by removing the isocyanate groups; Z<3> is the residue formed from a di- or trihydric polyether or another polyol by removing the hydroxyl groups; A<1> and A<2> each is a group represented by formula V or VI; B<1> and B<2> each is a group represented by formula V; B<3> is a group represented by formula VII (wherein R<1> to R<4> each is H or CH3 ; Y<1> is the residue formed from a dihydric alcohol by removing the hydroxyl groups; Y<2> is the residue formed from a trihydric alcohol by removing the hydroxyl groups; and Y<3> is a 2-4C alkylene); and m, n, and p each is 2 or 3. Examples of the component C include (meth)acrylic morpholide. |
