It contains the requisite double bond for the addition polymerization which is involved in the cross-linking of the polyester resins and could be used as active diluent and cross-linking agent for UPR.

• 可利用不饱和聚酯、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。