The present invention relates to the curative component of poly urethane/urea-forming casting compositions containing (a) an aromatic polyamine containing at least one thioether group, (b) a phosphate ester and (c) an aldehyde or a compound which forms an aldehyde upon reaction with water. Component (c) prevents the composition from discolouring with time into an unacceptable dark colour and also neutralises the strong odour resulting from the amine curative and its decomposition byproducts.
本发明涉及聚
氨酯/
尿素成型浇注组合物中的固化剂成分,该成分含有:(a) 至少含一个
硫醚基团的芳香族
多胺;(b)
磷酸酯;(c) 醛或与
水反应后形成醛的化合物。成分(c)可防止组合物随着时间的推移而褪色,变成不可接受的深色,还可中和
胺类固化剂及其分解副产物产生的强烈气味。