| abstract |
PURPOSE: To make it possible to release the titled resin from a mold without using any mold release, by polymerizing an at least bufunctional polyisocyanate with an at least bifunctional polythiol in a mold made of an olefin resin. n CONSTITUTION: 0.01W1.0wt% catalyst (e.g., dibutyltin dilaurate) is added to a mixture formed by mixing an at least bufunctional polyisocyanate (e.g., m- xylylene isocyanate) with an at least bifunctional polythiol (e.g., 1,2-ethanedithiol) at an NCO to SH molar ratio of 0.5W3.0, and the obtained mixture is cast in a mold made of a polyolefin resin (e.g., PP), polymerized by heating at 30W120°C for 0.5W24hr and cooled. n COPYRIGHT: (C)1987,JPO&Japio |