Epoxide resins are cured by heating with a hydroxyphenylurea of formula ##STR1## where R.sup.2 denotes --NH.sub.2, --NO.sub.2, --Cl, --Br, or alkyl, p denotes zero, x and y each denote zero or 1, and the sum of x+y is 1. Such hydroxyphenylureas may be used alone, as accelerators for heat-curing with other agents such as dicyandiamide, melamine, and carboxylic acid hydrazides, or may be used as the primary curing agent with promoters such as dicyandiamide, melamine, and carboxylic hydrazides.
环氧
树脂可通过与式为##STR1##的羟基苯
脲加热固化,其中R.sup.2表示--NH.sub.2,--NO.sub.2,--Cl,--Br或烷基,p表示零,x和y各表示零或1,且x+y的和为1。这种羟基苯
脲可以单独使用,作为加速剂与其他剂(如双
氰胺,
三聚氰胺和
羧酸肼)一起进行热固化,或者可以作为主要固化剂与
促进剂(如双
氰胺,
三聚氰胺和
羧酸肼)一起使用。