Method for post-treating raw hide, skin, leather and pelt with polyester

The invention relates to a method for post-treating an animal product selected from the group consisting of hide, skin, leather and pelt, in which the tanned animal product is subjected to retanning, in which an aqueous solution of a polyester is used according to the invention in the retanning, in which the polyester is formed by polycondensation of monomers A and monomers B, wherein monomer A is selected from the group consisting of a linear or branched, saturated or unsaturated carboxylic acid having 2 to 10 carbon atoms, a cyclic carboxylic acid having 5 to 10 carbon atoms and an aromatic carboxylic acid having 8 to 10 carbon atoms or anhydrides thereof, the carboxylic acid having at least two carboxyl groups and optionally one or more hydroxyl groups, and wherein monomer B is selected from the group consisting of polyols having 2 to 18 carbon atoms and at least 2 hydroxyl groups. 本发明涉及用于后处理动物产品的方法，所述动物产品选自由生皮、皮肤、皮革和毛皮组成的组，其中使经鞣制的动物产品经受复鞣，其中根据本发明在复鞣中使用聚酯的水溶液，其中所述聚酯通过单体A和单体B的缩聚形成，其中单体A选自由具有2至10个碳原子的直链或支链、饱