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Micro/nano-scale sheet type titanium polyester catalyst and application thereof

A micro-nano-scale, titanium-based polyester technology, applied in the field of titanium-based polyester catalysts, can solve problems such as high cost, poor dispersion, and easy hydrolysis

Active Publication Date: 2013-04-24
上海慧翌新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to provide a micro-nano-scale flake titanium-based polyester catalyst and its application to solve the above-mentioned defects of the existing titanium-based polyester catalyst system, such as poor dispersion, easy hydrolysis, and high cost.

Method used

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  • Micro/nano-scale sheet type titanium polyester catalyst and application thereof
  • Micro/nano-scale sheet type titanium polyester catalyst and application thereof
  • Micro/nano-scale sheet type titanium polyester catalyst and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Add 23g of n-butyl titanate to 498g (3mol, 1eq), terephthalic acid and 279g (4.5mol, 1.5eq) of ethylene glycol, under 0.1MPa gauge pressure, 150°C temperature control reaction for 1.2h, then raise the temperature Continue to react at about 260°C. Collect the distilled liquid during the esterification reaction, and stop the reaction when the mole number of water in it is twice that of terephthalic acid (that is, the degree of esterification is about 100%). The reaction system is cooled, and the solid therein is collected, which is an organotitanium compound Ti 4 (OCH 2 CH 2 O) 8 (OCOC 6 h 4 COO) 2 h 4 The complex dispersed in BHET with nanosheet structure, its scanning electron microscope see figure 1 . Further, the solid is ground or pulverized into powder, that is, titanium-based polyester catalyst A.

Embodiment 2

[0031] Dissolve the BHET of the complex in Example 1 with a 1:1 weight ratio of phenol-tetrachloroethane solution, centrifuge, and collect the insoluble matter that is the organic titanium compound Ti 4 (OCH 2 CH 2 O) 8 (OCOC 6 h 4 COO) 2 h 4 , the mixture of the compound and ethylene glycol is the titanium-based polyester catalyst B.

Embodiment 3

[0033] The slurry obtained by mixing the compound in Example 1 with ethylene glycol is the titanium-based polyester catalyst C.

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Abstract

The invention belongs to the technical field of titanium polyester catalysts and in particular relates to a micro / nano-scale sheet type titanium polyester catalyst and the application thereof. The micro / nano-scale sheet type titanium polyester catalyst provided by the invention comprises an organic titanium compound and a dispersing medium, wherein the structural formula of the organic titanium compound is Tix(OR1O)y(OOCC6H4COO)zH4. The invention further provides the titanium polyester catalyst for esterification reaction, transesterification and / or polycondensation reaction in catalytic polyester synthesis. Compared with the traditional polyester catalyst antimony acetate, the titanium polyester catalyst provided by the invention has the advantage that the reaction speed in the polycondensation stage is increased by more than 60%; compared with the titanium or titanium composite polyester catalyst, the titanium polyester catalyst provided by the invention has the advantage of good compatibility with the polyester; the micro / nano-scale sheet type titanium polyester catalyst provided by the invention has the advantages of low agglomeration, hydrolysis resistance, high temperature resistance and the like and is an efficient and stable polyester catalyst with low toxicity.

Description

technical field [0001] The invention belongs to the technical field of titanium-based polyester catalysts, and in particular relates to a micro-nano scale sheet-shaped titanium-based polyester catalyst and its application. Background technique [0002] The synthesis of polyester is generally divided into two steps: the first step is transesterification or esterification reaction, and the second step is polycondensation reaction. These two steps of reaction are carried out under the condition that catalyst exists, since polyester industry came out, the research of polyester catalyst has just never stopped. At present, the polyester catalysts with more industrial production and research are mainly three series of catalysts: antimony, germanium and titanium. [0003] Antimony-based catalysts are currently the most commonly used catalysts, and 90% of polyesters in the world are produced by antimony-based catalysts. Since antimony is a heavy metal element, in the production pro...

Claims

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Application Information

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IPC IPC(8): C08G63/85C08G63/183
Inventor 朱美芳孙宾陈龙周哲陈文萍
Owner 上海慧翌新材料科技有限公司
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