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Process for producing polyester

A production method and polyester technology, applied in the field of chemical catalysts, can solve the problems of decreased thermal stability, yellow color of polyester, unsatisfactory color of polyester, etc., and achieve the effect of good electrostatic adsorption capacity

Active Publication Date: 2007-04-25
TORAY IND INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this catalyst produces a new defect: the resulting polyester itself turns yellow in hue and has poor hot-melt stability
However, the color tone of the resulting polyester is unsatisfactory
After adding manganese compound, the color tone becomes better, but the thermal stability decreases, the amount of titanium compound added is large, and the reaction time is very long

Method used

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  • Process for producing polyester
  • Process for producing polyester
  • Process for producing polyester

Examples

Experimental program
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Effect test

Embodiment 1

[0029] The invention relates to a method for producing polyester, which is prepared from reactants used to produce polyester in the presence of a catalyst. The catalyst is composed of titanium compound, phosphorus compound and magnesium compound, and the titanium compound is a chelated titanium compound of lactic acid.

[0030] Phosphorus-containing compounds are compounds of the formula:

[0031]

[0032] The magnesium compound is magnesium oxalate (or magnesium propionate, magnesium malonate, magnesium succinate, magnesium acetate, magnesium stearate, magnesium hydroxide, magnesium sulfate, magnesium chloride).

[0033] The reaction formula for producing polyester is expressed as:

[0034] catalyst

[0035] A+B-------------------Polyester

[0036] Wherein A, B are the reactant of conventional production polyester.

[0037] A is terephthalic acid (also can be isophthalic acid, phthalic acid, methyl terephthalic acid, naphthalene dicarboxylic acid, bipheny...

Embodiment 2

[0053] The consumption of catalyzer is: the addition relative to polyester weight is:

[0054] The addition of titanium element in the titanium compound is 10ppm

[0055] The amount of phosphorus added in the phosphorus compound is 5ppm

[0056] The amount of magnesium added in the magnesium compound is 17ppm

[0057] The amount of dyestuff is: the addition amount of cobalt element in cobalt acetate is 25ppm

[0058] All the other are with embodiment 1.

Embodiment 3

[0060] The consumption of catalyzer is: the addition relative to polyester weight is:

[0061] The addition of titanium element in the titanium compound is 10ppm

[0062] The amount of phosphorus added in the phosphorus compound is 7.5ppm

[0063] The amount of magnesium added in the magnesium compound is 22ppm

[0064] The amount of dyestuff is: the addition amount of cobalt element in cobalt acetate is 25ppm

[0065] All the other are with embodiment 1.

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Abstract

The invention discloses a manufacturing method of polyester, wherein the catalyst is composed of titanium compound, phosphor compound and magnesium compound. The time of polymerization reaction is short with little side-reaction, which possesses excellent color, heat-proof, paintability and electrostatic adsorbing ability.

Description

Technical field: [0001] The present invention relates to a chemical catalyst. Background technique: [0002] Polyester, especially polyethylene terephthalate, polytrimethylene terephthalate and polybutylene terephthalate, due to its excellent mechanical, physical and chemical properties, such as good mechanical strength, heat resistance, Chemical resistance, good transparency, etc., have been widely used in many aspects, such as spinning staple fibers, filaments, used as packaging materials, electrical insulation materials, thin noodles and other molded products. However, with the expansion of its use and demand, the requirements for the characteristics of polyester and the improvement of productivity are becoming stricter in various fields. Polyester films are produced in various fields such as industrial use and magnetic materials, but there are still many problems to be solved. [0003] As a method for producing polyethylene terephthalate, the reaction product is polyco...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G63/85
Inventor 祁华卢群英本田圭介
Owner TORAY IND INC
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