| 摘要 |
The excessively fast reaction time produced by using polyoxyalkylene polyamines as curing agents for polyurethane formation can be moderated by reacting the polyoxyalkylene polyamines (1), with (2) derivatives of acrylic acid or alpha-substituted acrylic acids having terminal hydroxy groups, or with (3) compounds having oxirane rings. Alternatively the reaction product of (1) and (2) can be further reacted with (3), or the reaction product of (1) and (3) can be further reacted with (2). Preferred reactants are:… (1) polyoxypropylene diamines and triamines, and polyoxyethylene bis propylene diamines;… (2) hydroxyethyl acrylate, methacrylate or alphacyanoacrylate, and diethylene glycol monoacrylate; and… (3) ethylene oxide, propylene oxide, n-butylglycidyl ether and styrene oxide. |
