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Polyester catalyst for polymerization, polyester and method thereby

A technology of polymerization catalyst and production method, applied in the field of polyester and polyester production, which can solve problems such as difficulty in obtaining transparent hollow molded products, cap contamination, and decrease in productivity

Inactive Publication Date: 2004-07-07
TOYOBO CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Antimony trioxide is an inexpensive catalyst with excellent catalytic activity, but if it is used as a main component, that is, if it is used in an amount such that a practical polymerization rate can be exhibited, metal antimony is precipitated during polycondensation, So there is a problem of producing blackened parts or impurities in polyester
In addition, when used as a raw material for hollow molded products, etc., it is difficult to obtain hollow molded products with good transparency.
[0007] (2) Impurities in the polyester used for fibers will reduce the strength in the fibers and cause cover pollution during silk making
[0016] 1) Insoluble impurities increase, and when used as a fiber, the spinning property or the physical properties of the silk deteriorate, and when used in a film, the physical properties of the film deteriorate
[0017] 2) The hydrolysis resistance of the polyester polymer decreases, and due to impurities, the transparency decreases
[0018] 3) The color difference of the polyester polymer occurs, that is, the phenomenon that the polymer is colored yellow, and when it is used for a film or a hollow bottle, the problem of the color difference of the molded product will occur
[0019] 4) When the polyester is melted and molded products are manufactured, the filter pressure increases due to the clogging of impurities, which reduces productivity
However, such a method of using a supercritical fluid is not preferable because it is technically difficult and brings about an increase in the cost of the product.

Method used

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  • Polyester catalyst for polymerization, polyester and method thereby
  • Polyester catalyst for polymerization, polyester and method thereby
  • Polyester catalyst for polymerization, polyester and method thereby

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0176] Production of the polyester of the present invention can be carried out using a method having conventionally known steps except for using the polyester polymerization catalyst of the present invention as a catalyst. For example, when preparing PET, it is possible to use a direct esterification method in which terephthalic acid and ethylene glycol and other copolymerization components are directly reacted as required, water is distilled off, and after esterification, polycondensation is carried out under reduced pressure; A transesterification method is used in which dimethyl terephthalate and ethylene glycol are reacted and other copolymerization components are added as needed, methanol is distilled off, and transesterification is performed, followed by polycondensation under reduced pressure. In addition, if necessary, solid-phase polymerization may be performed in order to increase the intrinsic viscosity, reduce the acetaldehyde content, and the like. In order to pro...

Embodiment

[0250] The present invention is illustrated by examples below, but the present invention is not limited to these examples. The evaluation methods used in the respective Examples and Comparative Examples are as follows.

[0251] [Evaluation method]

[0252] (1) Intrinsic viscosity (IV)

[0253] The polyester was dissolved in a mixed solvent having a weight ratio of phenol / 1,1,2,2-tetrachloroethane of 6 / 4, and the measurement was performed at a temperature of 30°C.

[0254] (2) acid value

[0255] Add 0.1 g of polyester to 10 ml of benzyl alcohol, and heat to dissolve. The acid value was calculated by titrating using a methanol / benzyl alcohol=1 / 9 solution of 0.1N NaOH.

[0256] (3) Diethylene glycol content (DGE)

[0257] In 2 ml of methanol, 0.1 g of polyester was thermally decomposed at 250° C., and then quantitatively measured by gas chromatography.

[0258] (4) Differential scanning calorimetry (DSC)

[0259] Measurement was performed using DSC 2920 manufactured by TA...

Embodiment 30～32

[0277] (12) Formation of thin films (except Examples 30 to 32)

[0278] In each of the Examples and Comparative Examples, the PET resin sheet for the melt test was vacuum-dried at 135° C. for 6 hours. Thereafter, it was supplied to an extruder, melted and extruded at 280° C. into a sheet form, taken out, quenched and solidified on a metal roll maintained at a surface temperature of 20° C., and an extruded film with a thickness of 1400 μm was obtained.

[0279] Then, the extruded film was heated to 100° C. with a heated roll set and an infrared heater, and then stretched 3.5 times in the longitudinal direction on the roll set with a difference in rotation speed to obtain a uniaxially oriented PET film. Then, stretch 4.0 times in the width direction with a tenter at 120°C, and heat the film at 260°C for 0.5 seconds with an ultraviolet heater in a state where the film width and length are fixed, and then perform 3% heating at 200°C for 23 seconds After relaxation treatment, a bi...

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Abstract

This polycondensation catalyst is not an antimony compound. The polycondensation catalyst is a polymerization catalyst for polyester production which comprises an aluminum compound and a phosphorus compound having a specific structure. Also provided are a polyester produced with the polymerization catalyst; a process for producing a polyester; and a fiber, a film, and a hollow molding each made of the polyester.

Description

technical field [0001] The present invention relates to polyester polymerization catalyst, the polyester that utilizes it and the manufacture method of polyester, more specifically, relate to the novel polyester polymerization catalyst that does not use germanium, antimony compound as catalyst main component, utilizes The polyester obtained therefrom and the method for the manufacture of the polyester. Background technique [0002] Polyesters represented by polyethylene terephthalate (PET), polybutylene terephthalate (PBT), polyethylene naphthalate (PEN), etc., their mechanical properties and chemical Excellent properties, and depending on the properties of each polyester, it can be used in fibers for clothing or industrial resources, various films or sheets for packaging or tapes, hollow molded products such as bottles, shells of electrical and electronic equipment, and other engineering plastics It is used in a wide range of fields such as molded products such as [0003...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G63/82C08G63/83C08G63/84C08G63/87
CPCC08G63/82C08G63/87C08G63/826C08G63/83C08G63/84Y10T428/1328Y10T428/1352Y10T428/2913Y10T428/249921C08G63/00
Inventor 中嵨孝宏塚本健一形舞祥一森山畅夫桑田光启松井义直林清秀伊藤胜也松田全央
Owner TOYOBO CO LTD
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