Hydroxy-t-akyl peroxyesters having the general structure ##STR1## where R,R.sub.1, R.sub.2, R.sub.3 and R.sub.4 can be alkyl moieties and having 10 hour half-life temperatures below about 75.degree. C. (for example, 3-hydroxy-1,1-dimethylbutyl peroxyneodecanoate) are used as initiators for vinyl monomer polymerization and as catalysts for curing unsaturated polyester resins in order to improve the efficiency of the systems.
具有一般结构##STR1## 的羟基-t-烷基过氧酯,其中R、R.sub.1、R.sub.2、R.sub.3和R.sub.4可以是烷基基团,并且具有10小时半衰期温度低于约75°C(例如,3-羟基-
1,1-二甲基丁基过氧基新
戊酸酯),用作
乙烯单体聚合物的
引发剂,并用作催化剂,以固化不饱和聚酯
树脂,以提高系统的效率。