Anti-ultraviolet low-temperature dyeing cationic dyeable polyester composition as well as preparation method and application thereof

The invention discloses an anti-ultraviolet low-temperature dyeing cationic dyeable polyester composition and a preparation method thereof. The polyester composition is mainly composed of an aromatic dicarboxylic acid structural unit and an aliphatic dihydric alcohol structural unit, and also contains a sulfonate group, a polyethylene glycol structural unit and a benzotriazole or triazine ultraviolet light absorber, wherein the amount of the sulfonate group, the polyethylene glycol structural unit and the benzotriazole or triazine ultraviolet light absorber is 1000-5000 ppm relative to the total amount of the polyester composition in terms of an S element. The polyester has the characteristics of high strength, low-temperature dyeability and excellent dyeing fastness, and is suitable for the field of fibers. 本申请公开了一种抗紫外线低温染色阳离子可染聚酯组合物及其制备方法。所述聚酯组合物主要由芳香族二元羧酸结构单元和脂肪族二元醇结构单元构成，同时还含有以S元素计相对于聚酯组合物总量为1000～5000ppm的磺酸盐基团、聚乙二醇结构单元和苯并三唑或三嗪类紫外线吸收剂。所述聚酯具有高强度、低温可染、染色坚牢度优异的特性，适用于纤维领域。