申请人:Ciba-Geigy Corporation
公开号:US04404356A1
公开(公告)日:1983-09-13
Epoxide resins are cured by heating with a hydroxyphenylurea of formula ##STR1## where R.sup.2 and R.sup.3 each represent a (cyclo)alkyl, (cyclo)alkenyl, or aralkyl group, optionally substituted by --OH, --CN, or a halogen atom, with the proviso that R.sup.2 may also represent --H, or R.sup.2 and R.sup.3 together with the indicated attached N atom represent a heterocyclic radical, R.sup.4 denotes --NH.sub.2, --NO.sub.2, --Cl, --Br, or alkyl, and p denotes zero, 1, or 2. 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##的羟基苯基脲加热固化,其中R.sup.2和R.sup.3分别表示(环)烷基,(环)烯基或芳基烷基,可选地被--OH,--CN或卤素原子取代,但R.sup.2也可以表示--H,或者R.sup.2和R.sup.3与指示的连接N原子一起表示杂环基,R.sup.4表示--NH.sub.2,--NO.sub.2,--Cl,--Br或烷基,p表示零,1或2。这种羟基苯基脲可以单独使用,作为加速剂与其他剂如双氰胺,三聚氰胺和羧酸肼类一起进行热固化,或作为主要固化剂与促进剂如双氰胺,三聚氰胺和羧酸肼类一起使用。