A liquid polyester obtainable by reacting a cyclic acid anhydride (A) comprising at least 10 mol% of one of specific alkyl or alkenyl substituted cyclic acid anhydrides with an epoxy compound (B) in a molar ratio of (A):(B) of 10:8 - 10:12, optionally in the presence of a dry or semi-dry partially saponified fat and oil having a saponification ratio of 5 to 90%. The liquid polyesters contain preferably ethylenical unsaturation and may be used in film-forming materials.
一种液态聚酯,可通过使
环酸酐(A)与环氧化合物(B)反应而获得,
环酸酐(A)包含至少 10 摩尔%的特定烷基或烯基取代的
环酸酐,(A):(B)的摩尔比为 10:8 - 10:12,可选择在皂化率为 5 - 90% 的干或半干部分皂化油脂存在下进行反应。液态聚酯最好含有不饱和
乙烯,可用于成膜材料。