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Polyester composition, and preparation method and use thereof

A manufacturing method and composition technology, which is applied in the field of polyester composition and its manufacture, can solve the problems of insignificant, difficult to implement, and lower content of oligomer cyclic trimer regeneration inhibition, and achieve good regeneration inhibition effect , Industrial simple, easy to operate effect

Inactive Publication Date: 2015-11-25
TORAY FIBER RES INST(CHINA) CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the polyester obtained by this method is easy to precipitate chelating agent, boron salt, etc. during the high-temperature processing in the later stage, and the regeneration inhibition effect on the specific oligomer cyclic trimer is not obvious
The second method is to reduce the content of the cyclic trimer in the polyester through solid-state polymerization or heat treatment under an inert gas, but this method can only reduce the content of the initial cyclic trimer in the polyester , cannot solve the problem of its regeneration in the subsequent high-temperature processing environment
There are also methods such as Chinese patent CN102421820A disclosing a poly(trimethylene terephthalate) pellet with reduced oligomers, which is prepared by extracting from polyester with an organic solvent to remove the cyclic trimer, which This method needs to recover a large amount of organic solvents in the follow-up, the cost is high, the operation is troublesome, and it is difficult to implement in industry

Method used

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  • Polyester composition, and preparation method and use thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0072] At a temperature of 250°C, 166 parts by weight of PTA and 71.3 parts by weight of EG were added to the esterification reactor, and the esterification reaction was carried out under normal pressure. When the esterification reaction was completed, the temperature in the esterification reactor was 250°C. Fractional distillation of water yields small molecule polymers.

[0073] Add the catalyst methanesulfonic acid that is equivalent to polyester composition 10ppm in terms of sulfur element in the obtained small molecule polymer, the catalyst AO that is equivalent to polyester composition weight 50ppm in terms of antimony element, is equivalent to polyester in terms of alkali metal potassium element Potassium acetate of composition weight 16ppm is equivalent to the stabilizer PA of polyester composition weight 20ppm in terms of phosphorus element, after 5min, start to decompress and heat up, and the pressure is decompressed to about 300Pa after 1 hour, and the temperature ri...

Embodiment 2

[0075] At a temperature of 250°C, 166 parts by weight of PTA and 71.3 parts by weight of EG were added to the esterification reactor, and the esterification reaction was carried out under normal pressure. When the esterification reaction was completed, the temperature in the esterification reactor was 250°C. Fractional distillation of water yields small molecule polymers.

[0076] In the obtained small molecule polymer, add the catalyst sodium methanesulfonate equivalent to 20 ppm of the polyester composition in terms of sulfur elements, the catalyst AO equivalent to 2 ppm of the weight of the polyester composition in terms of antimony elements, and the equivalent of polyester composition in terms of phosphorus elements Stabilizer PA with a weight of 10ppm, after 5 minutes, start to depressurize and heat up, the pressure is decompressed to about 300Pa after 1 hour, and the temperature rises to 290°C after 1.5 hours; when the polycondensation reaction ends, the pressure in the r...

Embodiment 3

[0078] At a temperature of 250°C, 166 parts by weight of PTA and 71.3 parts by weight of EG were added to the esterification reactor, and the esterification reaction was carried out under normal pressure. When the esterification reaction was completed, the temperature in the esterification reactor was 250°C. Fractional distillation of water yields small molecule polymers.

[0079] Add the catalyst potassium benzene methane sulfonate that is equivalent to polyester composition 40ppm in terms of sulfur element in the obtained small molecule polymer, the catalyst AO that is equivalent to polyester composition weight 50ppm in terms of antimony element is equivalent to polyester composition in terms of phosphorus element Composition weight 20ppm stabilizer PA, after 5 minutes, start to depressurize and heat up, the pressure decompresses to about 300Pa after 1 hour, and the temperature rises to 290°C after 1.5 hours; when the polycondensation reaction ends, the pressure in the reactor ...

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Abstract

The invention discloses a polyester composition with low content of annular trimer, and a preparation method thereof. The polyester composition contains 1-100ppm of sulfur element and 1-100ppm of antimony element. The content of the annular trimer in the obtained polyester composition is 0.2-0.8wt%, the regeneration speed of the annular trimer in the polyester composition is very low, and the generation speed of the annular trimer in the process of melting at 300DEG C in nitrogen atmosphere is 0.001-0.015wt% / min, so the polyester composition can be used to films and other polyester products.

Description

technical field [0001] The present invention relates to a polyester composition and its production method and application, more specifically, to a polyester composition with low cyclic trimer content. Background technique [0002] Polyester, especially polyethylene terephthalate (PET), polytrimethylene terephthalate (PPT), polybutylene terephthalate (PBT), because of its excellent mechanical properties, chemical Characteristic, dimensional stability and transparency, widely used in fiber, film, resin and other fields. [0003] Generally, by-product oligomers are unavoidably produced during the polymerization of polyester, and their amount generally accounts for about 2wt% of the total amount of polyester. Said oligomers mainly refer to polymerized monomers, dimers, cyclic trimers, etc., among which cyclic trimers account for the vast majority, accounting for about 1 wt% of the total polyester. During the process of film making or spinning, oligomers will pollute some compo...

Claims

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Application Information

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IPC IPC(8): C08G63/183C08G63/87C08G63/86
Inventor 左文艳祁华李旭望月克彦
Owner TORAY FIBER RES INST(CHINA) CO LTD
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