Patent ID: 8911508

Claim:
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 R 1 and R 2 respectively stand for an alkoxy with 1-10 carbon atoms, R 3 , R 4 , R 5 and R 6 for hydrogen, methyl, and ethyl, and n 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(OCH 2 CH 2 ) m OH (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(OCH 2 CH(CH 3 )) z OH (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(OCH 2 CH 2 ) p (OCH 2 CH(CH 3 )) q OH (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.