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A kind of PTT polyester with concentrated molecular weight distribution and preparation method thereof

A molecular weight, polyester technology, applied in the field of chemical fiber processing, can solve problems such as broken ends and filaments, and achieve the effects of avoiding deactivation, reducing reaction energy consumption, and consistent prepolymer structure

Active Publication Date: 2022-08-09
ZHANGJIAGANG GLORY CHEM IND CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The existing technical system is mainly through the further increase to 0.90-1.00dl / g through the polycondensation stage after obtaining a higher viscosity (all public reports in the literature are above 0.20dl / g), and the prepared PTT polyester chips have a wide molecular weight distribution. Unfavorable effects such as broken ends and hairs caused by fiber forming process

Method used

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  • A kind of PTT polyester with concentrated molecular weight distribution and preparation method thereof

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Effect test

Embodiment 1

[0046] This embodiment provides a PTT polyester production method with a molecular weight concentrated distribution, which includes the following steps:

[0047] (1) Preparation of PTT polyester prefabricated: Mixed ben acid with 1,3-propylene glycol percent is 1: 1.1 mixed with pulp, and mixed with tin tin cobalt composite catalysts and sodium antinate acetate for esterization The reaction, until the amount of water output reaches 95 % of the theoretical esters, leaks the pressure of the reaction kettle to normal pressure, and continues to react for 15 minutes.

[0048] Among them, titanium cobalt composite catalysts are composed of 1: 0.5: 0.5, which are composite by titanium titanate, diode oxide tin oxide, and cobaltate. (PTA) 100PPM of the mass score; 100PPM of sodium acetate is the mass score of pta acid (PTA); the temperature of the esterization reaction is 220 ° C, the pressure of the esterization reaction is 200kPa, and the time for esterization reactions It is 3.5h; the ...

Embodiment 2

[0059] This embodiment provides a PTT polyester production method with a molecular weight concentrated distribution, which includes the following steps:

[0060] (1) Preparation of PTT polyester prefabricated: Mixed ben acid with 1,3-propylene glycol permol is mixed with 1: 1.5, and mixed with tin tin cobalt composite catalysts and sodium antinate acetate for esterization In the reaction, the water output reaches 95 % of the theoretical water output.

[0061] Among them, titanium cobalt composite catalysts are composed of 1: 0.5: 0.5, which are compounded by titanate titanate, oxidation tin, and cobalt acetate. ) 150 ppm of the mass score; the amount of sodium acetate is 500 ppm of the mass score of pta acid (PTA); the temperature of the esterization reaction is 230 ° C, the pressure of the esterization reaction is 100kPa, and the time for the esterization reaction is 2.5 H; The characteristic viscosity of the low -characteristic viscosity of PTT polyester is 0.14dl / g.

[0062] (2...

Embodiment 3

[0071] This embodiment provides a PTT polyester production method with a molecular weight concentrated distribution, which includes the following steps:

[0072] (1) Preparation of PTT polyester prefabricated: Mixed ben acid with 1,3-propylene glycol percent is 1: 1.3 mixed with pulp, and mixed with tin tin cobalt composite catalysts and sodium antinate acetate for esterization The reaction, until the esterization of the water output reaches 95 % of the theoretical esters, leaked the pressure of the reaction kettle to the normal pressure, and continued to react for 35 minutes.

[0073] Among them, titanium cobalt composite catalysts are made of titanic acid, oxidation tin and cobaltate modal. 150 ppm of the mass score; 600 ppm of the mass score of sodium acetate is the mass score of pta (PTA); the temperature of the esterization reaction is 230 ° C, the pressure of the esterization reaction is 100kPa, and the time for the esterization reaction is 3.0H; The characteristic viscosity...

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Abstract

The present invention provides a PTT polyester and its preparation method with a molecular weight concentrated distribution.This preparation method includes the following steps: Step 1: Mix the module of phenyl acid acid with 1,3‑ propenol to 1: 1.1‑1.5, and then add a tin tin cobalt composite catalyst for estering to the ester to water output.After reaching 95 % of the theoretical esters, the reaction pressure was leaked to the normal pressure, and the reaction reacts 15‑45min to make PTT polyester premature;The monomer Murbi is 1: 1.05 1.10 mixed for a homogeneous response, and then the PTT polyester that is concentrated in the concentrated distribution of the molecular measuring the molecular measuring reactions of the stirring pre -shrinking reaction in sequence is performed in turn;≤0.15dl / g, the addition of titanium cobalt composite catalysts is 100‑200ppm of the mass score of phenyl acidic acid.

Description

Technical field [0001] The present invention is the field of chemical fiber processing, involving a PTT polyester and its preparation methods involving a molecular weight concentrated distribution. Background technique [0002] Polyzhenyl glycol (PTT), a new type of organic polymer -aromatic polyester product with the same polymer series as PET and PBT. As a new type of polyester product, PTT has excellent characteristics. PTT has good processing performance, electrical performance, mechanical performance and size stability. PTT fiber maintains the excellent anti -wrinkle and chemical resistance of PET fibers, and the intensity meets the textile requirements. Excellent chromosome performance has great attraction to the dyeing and rectification of fibrous textiles, which is strongly attractive to improve economic and environmental benefits. In addition, it also has excellent flexibility, anti -Japanese light, pollution resistance, low static electrical, low water absorption, etc. ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G63/183C08G63/78C08G63/82C08G63/85D01F8/14
CPCC08G63/183C08G63/85C08G63/826C08G63/785D01F8/14Y02P70/62
Inventor 严建华韩冰
Owner ZHANGJIAGANG GLORY CHEM IND CO LTD
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