| 摘要 |
PURPOSE:To obtain a molded product which does not deteriorate reactivity with polyisocyanate, improves initial strength and has little discoloration in a coating, by making use of dimethyl tindilaurate as a catalyst of a composition containing activated hydrogen obtained by performing gas loading with gas containing oxygen by making use of a hindered phenolic stabilizer. CONSTITUTION:A polyurethane/polyurea molded product is obtained by a reactive injection molding method by making use of a composition containing activated hydrogen obtained by performing gas loading of gas containing oxygen and a modified diphenylmethane diisocyanate composition by adding dimethyl tindilaurate as a catalyst to a mixture comprised of polyester polyol, aromatic polyamine and hindered phenolic stabilizer whose molecular weight is 1,800-12,000 and terminal primary radical rate of 90% and the other auxiliary agent at need. |
