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A kind of preparation method of polycondensation catalyst, the catalyst prepared by it and the method for preparing PBS and copolymer thereof with the catalyst

A technology of polycondensation catalyst and copolymer, which is applied in the field of polybutylene succinate and its copolymer, can solve the problems of many by-products, low reactivity, poor product color, etc., and achieve easy operation, increased polymerization rate, The effect of enhancing the luster

Active Publication Date: 2015-08-12
TANGSHAN XUYANG CHEM IND CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] Aiming at the deficiencies in the prior art, the purpose of the present invention is to provide a kind of preparation method for the polycondensation catalyst of PBS and copolymer thereof, and the catalyst prepared by using this method, thus solve the problem of low reactivity and production of polycondensation catalyst in existing polycondensation catalyst. Obtain the problems such as poor product color; Another object of the present invention is to provide a kind of method that uses this catalyst to prepare PBS and copolymer thereof, thereby solve the problem such as many by-products in the existing PBS synthetic process

Method used

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  • A kind of preparation method of polycondensation catalyst, the catalyst prepared by it and the method for preparing PBS and copolymer thereof with the catalyst

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Effect test

Embodiment 1

[0036] 1.1 Catalyst preparation process

[0037] Mix 5g of n-butyl titanate, 1g of polyacrylamide, 2ml of concentrated hydrochloric acid and 30ml of distilled water, set the reaction temperature at 10°C, and stir for 6h under this condition to obtain a titanium dioxide sol (sol A);

[0038] Mix 2g ethyl orthosilicate, 0.8g hexadecyltrimethylammonium bromide, 1ml nitric acid and 10ml ethanol, set the reaction temperature at 30°C, stir for 6h under this condition to obtain a silica sol (sol B );

[0039] Mix the above-mentioned A sol and B sol at 40°C for a reaction time of 5 hours to obtain a titanium dioxide-silica mixed solution (mixed solution C);

[0040] Add 1 g of zinc acetate to the titanium dioxide-silicon dioxide mixed solution (mixed solution C), and stir at room temperature for 5 hours to obtain a titanium dioxide-silicon dioxide-metal compound mixed solution (mixed solution D).

[0041] Dissolve 4g of polyacrylamide in 200ml of water, and then slowly add it into t...

Embodiment 2

[0046] 2.1 Catalyst preparation process

[0047] Mix 2g of isopropyl titanate, 0.6g of hexadecyltrimethylammonium bromide, 1ml of concentrated hydrochloric acid and 10ml of distilled water, set the reaction temperature at 0°C, and stir for 10h under this condition to obtain a titanium dioxide sol (sol A) ;

[0048] Mix 7g of ethyl orthosilicate, 1g of sodium dodecylsulfonate, 2ml of concentrated hydrochloric acid and 20ml of ethanol, set the reaction temperature at 60°C, and stir for 10h under this condition to obtain a silica sol (sol B);

[0049] Mix the above-mentioned A sol and B sol at 40°C for a reaction time of 8 hours to obtain a titanium dioxide-silica mixed solution (mixed solution C);

[0050] Add 2g of magnesium acetate to the titanium dioxide-silicon dioxide mixed solution (mixed solution C), and stir at 40°C for 1 hour to obtain a titanium dioxide-silicon dioxide-metal compound mixed solution (mixed solution D). Dissolve 4g of polyvinylpyrrolidone in 160ml of w...

Embodiment 3

[0055] 3.1 Catalyst preparation process

[0056] Mix 5g of n-butyl titanate, 2ml of concentrated hydrochloric acid, 2g of sodium polyacrylate and 30ml of distilled water, set the reaction temperature at 0°C, and stir for 4 hours under this condition to obtain a titanium dioxide sol (sol A);

[0057] Mix 2g of tetraethyl orthosilicate, 1ml of concentrated hydrochloric acid and 10ml of ethanol, set the reaction temperature at 30°C, and stir for 4 hours under this condition to obtain a silica sol (sol B);

[0058] Mix the above-mentioned A sol and B sol at 30°C for a reaction time of 5 hours to obtain a titanium dioxide-silica mixed solution (mixed solution C);

[0059] Add 1.5g of manganese acetate to the titanium dioxide-silica mixed solution (mixed solution C), and stir at 60°C for 5h to obtain a titanium dioxide-silicon dioxide-metal compound mixed solution (mixed solution D).

[0060]Dissolve 4g of sodium polyacrylate in 200ml of water, and then slowly add it into the titan...

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Abstract

The invention relates to a preparation method of a polycondensation catalyst, the polycondensation catalyst prepared by the preparation method, and a method used for preparing PBS and PBS copolymer by using the polycondensation catalyst. According to the preparation method, on the one hand, activity of titanium is controlled, and dosage of titanium is reduced by taking advantage of coordination effect of a surfactant compound, and controlling hydrolysis speed of titanium silicon; and on the other hand, catalytic action of the catalyst on side reaction of polycondensation and thermal oxidative degradation is inhibited for a certain degree, and physical and mechanical properties and the color of polyester products are improved by controlling the surfactant compound and active center titanium.

Description

technical field [0001] The invention relates to a method for preparing a polycondensation catalyst and a method for preparing polybutylene succinate (PBS) and a copolymer thereof using the catalyst. Background technique [0002] Polybutylene succinate (PBS) and its copolymers have excellent comprehensive performance and biodegradability, and become one of the most promising materials for industrialization and commercialization in aliphatic polyesters. research hotspots in academia. [0003] At present, the reason why PBS has not been applied on a large scale has a lot to do with its performance in addition to its high price. Its performance problems are mainly manifested as low molecular weight and poor industrial color. This is because by-products such as decarboxylation, cyclization, and thermal degradation are prone to occur in the later stage of the polycondensation reaction, resulting in low molecular weight of the prepared PBS. In addition, the color of the obtained P...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G63/87C08G63/85C08G63/82C08G63/16
Inventor 张英伟王国利孟为明冯清正孙长江
Owner TANGSHAN XUYANG CHEM IND CO LTD
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