TH21927B - Method of oxidizing polymers Ionized bis-B-hydroxyethyl terephthalate - Google Patents

Abstract

DC60 (20/11/43) Method of production of polyesters from high purity bis-beta-hydroxyethyl terephthalate as raw material with cation. And anion in small quantities Raw materials for the production of polyester include bis-beta-hydroxyethyl terephthalate with cations and anions in overall weight. Not more than 50 ppm, ethylene glycol and antimony trioxide and / or germanium dioxide are catalysts. Of the formation of polymers Are vitrified without true ethylene glycol distillation and then heated Under reduced pressure to Polycondens were carried out while distillation of ethylene glycol by the method of polyester production from bis-B-hydroxyethyl terephthalate. High purity as raw material with cation And anion in small quantities Raw materials for the production of polyester include bis-B-hydroxyethyl terephthalate with cations and anions. In overall weight Not more than 50 ppm, ethylene glycol and antimony trioxide and / or germanium dioxide are catalysts. Of the polymerization, it is heated without purely distillation of ethylene glycol and then heated. Under reduced pressure to Do polycondensation while distilling ethylene glycol as well.

Claims (5)

1. Methods for the production of polyester including (1) preparation of polyester production raw materials including Bis-beta-hydroxyethyl terephthalate with total cations and anions of not more than 50 ppm, ethylene glycol and at least one catalyst. One polymerization reaction selected from a group containing antimony trioxide and germanium dioxide (2). Heating of raw materials, producing polyester. Without the distillation of ethylene Truly glycol and (3) polycondensation to raw materials by heating them under reduced pressure while Distilled out ethylene glycol 2. Method of claim 1, whereby the polyester production raw materials include at least One member selected from a group containing terephthalic acid, isopthalic acid, and cyclohexamine. Sendai Methanol 3. Method of claim 2 where the raw material for the production of polyester will include terephthalic acid, and the content of terephthalic acid is 0.05 to 20 moles based on 1 ml of bis-beta-hydroxyethyl terephthalate with a cation. And all anions in total weight not more than 50 ppm 4. Method of claim 2 whereby the raw material for the production of polyesters includes isopthalic acid and / or cyclohexendi methanol, and its content. Of isopthalic acid and / or cyclohexendai methanol is 0.05 to 50 mol, based on 1 mL of bis-beta-hydroxyethylturep. A thalate with total cations and anions not more than 50 ppm 5. Method of claim 1 by which polycondensation is performed in the presence of a substance. Provides a stabilization based on phosphorus.