Modifier for polyester fiber as well as preparation method and application of the same

摘要

The present invention discloses a modifier for modifying a polyester fiber as well as a preparation method and application of the same. The modifier contains ethylene glycol, two-hydroxy-end polyether, dimethyl terephthalate, two-polyether-end modified organosilicon and a metal acetate catalyst. A two-step continuous production process is adopted. The first step is esterification; that is, ethylene glycol, two-hydroxy-end polyether, dimethyl terephthalate, and two-polyether-end organosilicon are added into a reactor, and have an esterification reaction in the presence of the catalyst. In the second step, the materials produced by the esterification are transported to a polymerizer, and have a polymerization reaction under the conditions of high temperature, vacuum and catalyst, producing the high molecular weight polyester/polyether/organosilicon terpolymer with a molecular weight of 1000˜50000 as the desired modifier. This modifier can be used either directly or in combination with some other substances such as surfactants, so as to modify the polyester fiber.

主权项

1. A modifier for polyester fiber, comprising the following components based on parts by weight:
10-25 parts of ethylene glycol; 15-25 parts of dimethyl terephthalate; 1-50 parts of organosilicon having a general formula: where
R1 and R2 respectively stand for an alkoxy with 1-10 carbon atoms,R3, R4, R5 and R6 for hydrogen, methyl, and ethyl, andn stands for a number of repeating units and is of a value such that the molecular weight of a polyester/polyether/organosilicon terpolymer of the modifier is in a range of 1000-5000 dalton; 0.2-1 parts of metal acetate with a molecular weight of 1000-20000 dalton as a catalyst; and 80-170 parts of compounds selected from one, two or more kinds of two-hydroxy-end polyethers with a general formula of (I), (II) or (III):
H(OCH2CH2)mOH  (I), where m stands for a number of repeating units and has a value such that the molecular weight of the two-hydroxy-end polyether with the general formula of (I) is from 10000 to 20000 dalton;
H(OCH2CH(CH3))zOH  (II), where z stands for a number of repeating units and has a value such that the molecular weight of the two-hydroxy-end polyether with the general formula of (II) is from 1000 to 5000 dalton; or
H(OCH2CH2)p(OCH2CH(CH3))qOH  (III), where p and q stand for a number of repeating units and have values such that the molecular weight of the two-hydroxy-end polyether with the general formula of (HI) is from 5000 to 9000 dalton.