Functional polyester product and preparation method thereof

Abstract

The invention belongs to the field of functional polyester, and particularly discloses a preparation method of functional polyester. The preparation method of the functional polyester comprises the following steps: (1) mixing functional powder with dihydric alcohol, and then grinding the mixture to obtain functional powder slurry; (2) mixing terephthalic acid with dihydric alcohol, and then carrying out esterification reaction on the mixture to prepare a polyester oligomer; (3) mixing the functional powder slurry prepared in step (1) with the polyester oligomer prepared in step (2), depressurizing, and then devolatilizing to obtain a functional polyester oligomer; (4) performing pre-polycondensation reaction and final polycondensation reaction on the functional polyester oligomer obtainedin step (3) to obtain functional polyester; and adding a copolymerization modified monomer slurry in an esterification reaction process, wherein the copolymerization modified monomer slurry is prepared by taking the copolymerization modified monomer as a raw material. By the preparation method disclosed by the invention, high uniform dispersion of the functional powder in the functional polyestercan be realized, and the polyester product further has composite functions of cationic dyeing, disperse dye normal pressure dyeing, antibiosis, hydrophilicity, low melting point, high shrinkage, cotton imitation and the like.

Description

technical field [0001] The invention belongs to the field of functional polyester preparation, and in particular relates to a functional polyester product and a preparation method thereof. Background technique [0002] At present, the preparation method of functional polyester fiber is mainly the masterbatch method. The masterbatch method is to first melt and mix the functional powder and the carrier resin to obtain a functional masterbatch with high functional powder content, and then uniformly mix the functional masterbatch melt and the polyester melt for spinning to obtain a functional polymer through the spinning process. Ester fiber. Due to the process of preparing functional polyester fibers by the masterbatch method, the dispersion of functional powders in high-viscosity polyester melts mainly depends on the mechanical shear force provided by the mixing equipment, so it is difficult to realize the dispersion of functional powders in polyester melts. The high uniform...

AI Technical Summary

Problems solved by technology

The method for preparing functional polyester in this invention is a batch method, and the product quality stability is poor; Simple stirring and mixing not only cannot achieve efficient dispersion of functional powders, but also tends to agglomerate functional powders due to the high-temperature gasification of slurry carrier ethylene glycol during the addition of functional powder slurry

In addition, the fiber products produced by the functional polyester produced by this method have poor functionality and cannot meet production needs.

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