Oxidation yellowing resistant optical polyester and preparation method thereof

The invention discloses an oxidation yellowing resistant optical polyester. The optical polyester is prepared from the following raw materials in parts by weight: 20000-30000 parts of phthalic acid, 6000-10000 parts of ethylene glycol, 5-15 parts of catalyst, 10-25 parts of stabilizer, 2-10 parts of anti-blocking agent, 5-30 parts of phosphite antioxidant and 0.1-2 parts of magnesium salt. The optical polyester disclosed by the invention has favorable color value, oxidation resistance, ultraviolet resistance, thermal stability and wet and heat ageing resistance on the basis of ensuring the optical property; the optical polyester is not yellowed under the condition of long-term usage; and meanwhile, the optical polyester has high tensile strength and favorable dimensional stability, thereby being especially applicable to the fields of electronic products such as screen films, back board films and the like. 本发明公开种抗氧化黄变的光学聚酯，由包括以下重量份数的原料制得：二甲酸单体：20000-30000份，乙二醇：6000-10000份，催化剂：5-15份，稳定剂：10-25份，开口剂：2-10份，亚磷酸酯类抗氧