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Polybutylene terephthalate catalyst and preparation method thereof

A polybutylene terephthalate and catalyst technology, which is applied in the field of polybutylene terephthalate catalyst and its preparation, can solve the problems of easy hydrolysis and insufficient reaction speed, and achieve fast intrinsic viscosity and reaction The effect of fast speed and fast solid phase polycondensation speed

Pending Publication Date: 2020-05-01
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] One of the technical problems to be solved by the present invention is the problems such as easy hydrolysis and insufficient reaction speed when using titanium-based catalysts in the PBT polymerization process in the past. A polybutylene terephthalate catalyst is provided, through specific components and specific methods The prepared catalyst, the novel titanium-based catalyst provided by the present invention, overcomes the shortcomings of the existing catalysts, not only has good catalytic activity, is hydrolysis-resistant, and is easy to store, but also has a faster speed when the prepared PBT chips are used for solid-phase polycondensation, improving productivity

Method used

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  • Polybutylene terephthalate catalyst and preparation method thereof
  • Polybutylene terephthalate catalyst and preparation method thereof
  • Polybutylene terephthalate catalyst and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0041]Add 170 grams (0.5 mol) of n-butyl titanate into a reactor equipped with a stirrer, a condenser and a thermometer, and slowly drop 434 g (4.1 mol) of 85% pure lactic acid aqueous solution into the reactor using a dropping funnel , React at 30-50°C for about 2h. The temperature was raised to 80-85°C and the n-butanol / water mixture was removed by vacuum. The product was cooled to about 40° C., and 270 g (3 mol) of 1,4-butanediol was slowly added to the stirred solution. The product was a pale yellow homogeneous liquid.

Embodiment 2

[0043] Add 170 grams (0.5 mol) of n-butyl titanate into a reactor equipped with a stirrer, a condenser and a thermometer, and slowly drop 106 g (1.0 mol) of 85% pure lactic acid aqueous solution into the reactor using a dropping funnel , React at 30-50°C for about 2h. The temperature was raised to 80-85°C and the n-butanol / water mixture was removed by vacuum. The product was cooled to about 40° C., and 270 g (3 mol) of 1,4-butanediol was slowly added to the stirred solution. The product was a pale yellow homogeneous liquid.

Embodiment 3

[0045] Add 170 grams (0.5 mol) of n-butyl titanate into a reactor equipped with a stirrer, a condenser and a thermometer, and slowly drop 106 g (1.0 mol) of 85% pure lactic acid aqueous solution into the reactor using a dropping funnel , React at 30-50°C for about 2h. The temperature was raised to 80-85°C and the n-butanol / water mixture was removed by vacuum. The product was cooled to about 40° C., and 414 g (4.6 mol) of 1,4-butanediol was slowly added to the stirred solution. The product was a pale yellow homogeneous liquid.

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Abstract

The invention relates to a polybutylene terephthalate catalyst and a preparation method thereof. The method mainly solves the problems of easy hydrolysis, insufficient reaction speed and the like caused by adopting a titanium catalyst in the PBT polymerization process in the prior art, and adopts a catalyst which comprises a reaction product of the following raw materials: (1) a titanium compoundA with a general formula; (2) a diol B having 2 to 10 carbon atoms; and (3) at least one aliphatic organic acid C selected from organic acids. The preparation method comprises the following steps: a)reacting the titanium compound A with the aliphatic organic acid C, and removing the byproduct (alcohols or an alcohol-water mixture) to obtain a complex of the titanium compound A and the aliphatic organic acid C; and b) adding the complex obtained in the step a) into diol B to obtain the catalyst. The problem is well solved, and the preparation method can be applied to industrial production of polybutylene terephthalate.

Description

technical field [0001] The invention relates to a polybutylene terephthalate catalyst and a preparation method thereof. Background technique [0002] Polybutylene terephthalate (PBT) is a crystalline linear saturated polyester and is a thermoplastic material. Because of its easy processing and molding, excellent electrical properties, mechanical properties, and heat resistance, it is widely used in electronic and electrical components , automobiles, machinery and equipment, and fiber optic cables and other fields. Film, sheet, fiber and other fields are gradually widely used. In addition, in order to meet the needs of specific physical and mechanical properties and processing properties, in industrial production, the method of solid-state polycondensation is usually used to produce higher molecular weight PBT products after melt polycondensation. Solid-state polycondensation heats slices with lower molecular weight to between the glass transition temperature and melting po...

Claims

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Application Information

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IPC IPC(8): C08G63/85C08G63/183
CPCC08G63/183C08G63/85
Inventor 王睿熊金根关震宇章瑛虹
Owner CHINA PETROLEUM & CHEM CORP
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