申请人:AGFA-GEVAERT
naamloze vennootschap
公开号:EP0078559A1
公开(公告)日:1983-05-11
An aqueous copolyester dispersion suitable for the subbing of polyester film without use of organic solvents wherein the copolyester contains recurring ester groups derived from ethylene glycol and an acid mixture containing terephthalic acid, isophthalic acid and sulphoisophthalic acid whose sulpho group is in salt form, wherein the said acid mixture essentially consists of from 20 to 60 mole % of isophthalic acid, from 6 to 10 mole % of said sulphoisophthalic acid, from 0.05 to 1 mole % of an aromatic polycarboxylic acid compound which has at least three carboxylic acid groups, said polycarboxylic acid being not capable of forming intramolecularly an anhydride and including at least two carboxylated aromatic nuclei, and the remainder in said acid mixture being terephthaiicacid; the copolyester has a glass transition temperature of at least 50°C and an intrinsic viscosity of from 0.15 to 0.45 dl/g when measured at 25°C in a mixture of phenol/o-dichlorobenzene(60/40 byvol- ume).
一种不使用有机溶剂而适用于聚酯薄膜浸渍的水性共聚聚酯分散体,其中共聚聚酯含有源自乙二醇的重复酯基,以及含有对苯二甲酸、间苯二甲酸和砜基为盐形式的砜基间苯二甲酸的酸混合物,其中所述酸混合物基本上由20至60摩尔%的间苯二甲酸、6至10摩尔%的所述砜基间苯二甲酸、0.05至1摩尔%的芳香族聚羧酸化合物,该化合物具有至少三个羧酸基团,所述聚羧酸不能在分子内形成酸酐,并包括至少两个羧化的芳香族核,所述酸混合物中的其余部分为对苯二甲酸;所述共聚聚酯的玻璃化转变温度至少为50°C,固有粘度为0.在苯酚/二氯苯(体积比为 60/40)的混合物中于 25℃测量时,共聚聚酯的玻璃化转变温度至少为 50℃,固有粘度为 0.15 至 0.45 分升/克。