Monomeric esters of fumaric, maleic, citraconic, mesaconic, itaconic, aconitic, or methylene malonic acid and alcohols of the formula C.sub.m F2.sub.m+1 C.sub.n H2.sub.n OH and mercaptans of the formula C.sub.m F2.sub.m+1 C.sub.n H2.sub.n SH form homopolymers and form copolymers with other ethylenically unsaturated comonomers. The polymers obtained have valuable soil repellent properties and are especially useful in textile finishes. Preferred compounds are bis (1,1,2,2-tetrahydroperfluorononyl) fumarate and bis (1,1-dihydroperfluorooctyl) fumarate.
富马酸单体酯,
马来酸单体酯,
柠檬酸单体酯,美沙酸单体酯,
顺丁烯二酸单体酯,顶酸单体酯,或甲基
丙烯二酸单体酯与C.sub.m F2.sub.m+1 C.sub.n H2.sub.n OH的醇或C.sub.m F2.sub.m+1 C.sub.n H2.sub.n SH的巯基形成同聚物,并与其他
乙烯基不饱和共聚单体形成共聚物。所得到的聚合物具有有价值的防污性能,在纺织品整理中特别有用。首选化合物为双(1,1,2,2-四氢过
氟壬酰基)
富马酸酯和双(1,1-二氢过
氟辛酰基)
富马酸酯。