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Catalyst system composition for making pet resin

A catalyst and composition technology, applied in the field of catalyst system composition, can solve problems such as long process time, yellowish color of PET resin, slow solid-state polymerization rate, etc., and achieve the effects of shortening process time, improving yellowish color, and increasing rate

Inactive Publication Date: 2019-11-01
ALMIGHTY GREEN MATERIAL INC +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The above-mentioned method of utilizing titanium (Ti) catalyst to replace antimony (Sb) catalyst as condensation reaction has the advantages that the condensation reaction (condensation) rate is fast, and the PET resin made does not contain heavy metals, but at present, titanium (Ti) catalyst is used When manufacturing PET resin, there are still problems of slow solid-state polymerization (solid-state polymerization), long process time, and yellowish color of PET resin

Method used

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  • Catalyst system composition for making pet resin
  • Catalyst system composition for making pet resin
  • Catalyst system composition for making pet resin

Examples

Experimental program
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Effect test

Embodiment 1

[0032] The BHET monomer of weighing 400g and 20g ethylene glycol (ethylene glycol) are placed in reactor, then add the cesium tungsten oxide nano-dispersion liquid ( cesium tungsten oxide content is 10ppm of theoretical PET weight) catalyst system composition, add 0.03g phosphoric acid in addition (phosphorus content is 24.5ppm of theoretical PET weight); Decrease to 60mmHg for about 30 minutes; then raise the temperature to 280°C, further reduce the vacuum to 1torr (approximately equivalent to 1mmHg), and continue the reaction until the torque value displayed by the agitator reaches a fixed value before feeding. The subsequent solid-state polymerization steps are as follows. Weigh 50-100g of the polymerized PET product and place it in a vacuum high-temperature furnace. The reaction temperature rises from room temperature to 215°C for about 1 hour, and when it reaches 215°C, it is kept at a constant temperature for 6 hours. room temperature. Then measure the intrinsic viscosi...

Embodiment 2

[0034] The BHET monomer of weighing 400g and 20g ethylene glycol (ethylene glycol) are placed in reactor, then add and comprise 0.056g TBT catalyst (titanium content is 20ppm of theoretical PET weight), 0.420g cesium tungsten oxide nanodispersion liquid ( Cesium tungsten oxide content is 50ppm of theoretical PET weight) catalyst system composition, add 0.03g phosphoric acid (phosphorus content is 24.5ppm of theoretical PET weight) in addition; Decrease to 60mmHg for about 30 minutes; then raise the temperature to 280°C, further reduce the vacuum to 1torr (approximately equivalent to 1mmHg), and continue the reaction until the torque value displayed by the agitator reaches a fixed value before feeding. The subsequent solid-state polymerization steps are as follows. Weigh 50-100g of the polymerized PET product and place it in a vacuum high-temperature furnace. The reaction temperature rises from room temperature to 215°C for about 1 hour, and when it reaches 215°C, it is kept at ...

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Abstract

The invention relates to catalyst system composition for production of PET (polyethylene terephthalate) resin. The catalyst system composition comprises a polycondensation reaction catalyst and cesiumtungsten oxide shown in chemical formula CsxWO(3-y)Cly, wherein Cs is cesium, Cl is chlorine, w is tungsten, O is oxygen, x is larger than 0 and smaller than or equal to 1, and y is larger than or equal to 0 and smaller than or equal to 0.5. The invention also relates to the PET resin produced from the catalyst system composition and comprising 2-80 ppm of cesium tungsten oxide. Therefore, by means of the catalyst system composition, the problems of slower solid polymerization rate, long process period and yellowing in existing PET resin processes can be solved, and catalyst system composition can endow the PET resin with an infrared light absorption function.

Description

technical field [0001] The present invention relates to a kind of catalyst system composition, relate in particular to a kind of solid-state polymerization rate that can be used to improve polyethylene terephthalate (polyethylene terephthalate, abbreviation PET) resin technology, shorten its process time, and improve PET resin has Catalyst system compositions with yellowish color problems. Background technique [0002] Polyethylene terephthalate (PET) resin is a polyester polymer commonly used in the manufacture of packaging containers. The containers made from this resin not only have good strength, but also have the advantages of good transparency and chemical resistance. The current production method of PET resin includes three stages of esterification, condensation and solid-state polymerization. [0003] Among the existing production methods, the heavy metal antimony (Sb) is often used as the catalyst (catalyst) of the condensation reaction, for example, US Patent Publ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G63/85C08G63/86C08G63/83C08G63/80C08G63/183
CPCC08G63/183C08G63/80C08G63/83C08G63/85C08G63/866
Inventor 王文廷钟松政钟宝堂
Owner ALMIGHTY GREEN MATERIAL INC
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