低收缩不饱和聚酯用分散稳定剂

DISTRIBUTION STABILIZER USED FOR UNSATURATED POLYESTER WITH LOW SHRINKAGE

报道了一种低收缩型不饱和聚酯用分散稳定剂。这种功能性添加剂是以饱和聚酯为枝链、苯乙烯为主链的梳状接枝共聚物，它对以苯乙烯系聚合物为低收缩剂组成的不饱和聚酯树脂体系具有良好的分散稳定效果。可利用不饱和聚酯、低收缩剂和分散稳定剂适当的配合，组成低收缩型不饱和聚酯。这种组成物可长时间保存而没有低收缩剂漂浮而分层的现象。其固化物表面光滑、匀称。这种组成物可应用于要求成型件的表面状态、尺寸精度、形态稳定性高的领域。

Dispersion stabilizer, a kind of graft copolymer made from styrene and saturated polyester, shaped like a comb for its molecular structure, used for unsaturated polyester resin with low shrinkage , were introduced in this paper. It could aid the anti-shrinking agent, a kind of polystyrene, to steady disperse in UPR in certain composition to make a homogeneous low shrink resin product without floating or stratification. The cured compound was uniform and with small change in size.