A foamable and simultaneously curable polyester composition is disclosed, said composition consisting essentially of, all parts being by weight:
(a) 100 parts liquid unsaturated polyester resin;
(b) 0.5 to 10 parts monosubstituted sulfonyl hydrazide having the formula RS02NHNH2, wherein R is C1-C12 alkyl, C6-C6 cycloalkyl, C2-C10 aralkyl, phenyl, naphthyl, or phenyl substituted with halogen, C1-C12 alkyl or C1-C12 alkoxy;
(c) 0.1 to 5.0 parts of a promoter, said promoter consisting essentially of a mixture of organic heavy metal salt and organic alkali metal salt, wherein the heavy metal/ alkali metal molar ratio is from 1011 to 1/10;
(d) 0 to 2 parts surfactant;
(e) 0 to 250 parts of filler; and
(f) 0.3 to 5 parts of a cross-linking initiating compound selected from organic peroxides and organic hydroperoxide.
Methods for preparing a foamed and cured polyester resin, making use of the above composition, are also described.
本发明公开了一种可发泡并同时固化的聚酯组合物,所述组合物主要由以下部分组成,所有部分均以重量计:
(a) 100 份液态不饱和聚酯
树脂;
(b) 0.5 至 10 份单取代磺酰
肼,其式为 RS02NHNH2,其中 R 为 C1-C12 烷基、C6-C6 环烷基、C2-C10 芳烷基、苯基、
萘基或被卤素、C1-C12 烷基或 C1-C12 烷氧基取代的苯基;
(c) 0.1 至 5.0 份
促进剂,所述
促进剂主要由有机重
金属盐和有机碱
金属盐的混合物组 成,其中重
金属/碱
金属摩尔比为 1011 至 1/10;
(d) 0 至 2 份表面活性剂;
(e) 0 至 250 份填料;以及
(f) 0.3 至 5 份选自有机过氧化物和有机
过氧化氢的交联引发化合物。
此外,还介绍了利用上述组合物制备发泡固化聚酯
树脂的方法。