| 摘要 |
PURPOSE:To obtain an amine catalyst composition resistant to migration in a polyurethane resin and giving a polyurethane having excellent long-term aging resistance and moldability by adding a specific amount of triethylenediamine to a specific polyamine compound having terminal hydroxyl group. CONSTITUTION:The objective polyurethane having excellent aging resistance and moldability can be produced by reacting a polyol (e.g. polyether polyol) with a polyisocyanate (e.g. diphenylmethane-4,4'-diisocyanate) in the presence of the amine catalyst composition for the production of polyurethane, a foaming agent (e.g. trichloromonofluoromethane) and optionally other assistant. The amine catalyst is obtained by compounding an amine compound having a hydroxyl group on one terminal and expressed by formula I (R1 to R3 are 1-3C alkyl; n is integer of 0-3) [e.g. N,N,N'-trimethyl-N'-(2-hydroxypropyl)ethylenediamine] with triethylenediamine of formula II at a weight ratio (I/II) of 0.75-12. |
