Polyester and production method thereof

Abstract

The invention discloses polyester and a production method thereof. The polyester at least contains a compound A derived from an inorganic antimony compound, a compound B derived from an organic acid calcium compound, a compound C derived from an organic acid lithium compound, a compound D derived from a stabilizer organic phosphorus compound and a compound E derived from inorganic phosphate, wherein the content of phosphorus elements in the inorganic phosphate relative to the weight of polyester is 1-200ppm. The invention has obvious advantages, an obtained polyester slice has favorable hydrolysis resistance, and a polymer has small foreign matter size.

Description

Technical field:

[0001] The invention relates to a hydrolysis-resistant polyester and a production method thereof. Background technique:

[0002] Polyester itself has excellent characteristics, especially polyethylene terephthalate (PET), polytrimethylene terephthalate and polybutylene terephthalate. Due to their excellent mechanical, physical and chemical properties, Such as good mechanical strength, heat resistance, chemical resistance, and good transparency, it is widely used in various fields as fibers, films, resins and other molded products. However, most polyesters have poor hydrolysis resistance in high temperature and humid environments. Under such conditions, polyester is extremely susceptible to hydrolysis catalyzed by its remaining terminal acid groups, resulting in deterioration of physical properties.

[0003] Because polyester end groups are sensitive to moisture, the industrial application of polyester is greatly restricted. Therefore, in order to expand its appli...

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