Polyester polycondensation catalyst and preparation method and application thereof

A polycondensation catalyst and catalyst technology, applied in the field of polyester polycondensation catalyst and its preparation and application, can solve problems affecting product performance, achieve the effects of suppressing side reactions, high brightness, and improving activity

Active Publication Date: 2010-11-24
INST OF CHEM CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, during the blending process, PET will inevitably be degraded due

Method used

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  • Polyester polycondensation catalyst and preparation method and application thereof
  • Polyester polycondensation catalyst and preparation method and application thereof
  • Polyester polycondensation catalyst and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0024] Example 1. Preparation of polyester polycondensation catalyst

[0025] Take 5 mL of concentrated hydrochloric acid, 10 mL of ethanol, mix with 19.6 g of ethyl orthosilicate (TEOS) at room temperature, and stir for 1 hour to obtain the product A SiO 2 Sol.

[0026] Mix 2.5 g of tetrabutyl titanate and 10 mL of concentrated hydrochloric acid at room temperature, and stir at room temperature for 1 hour to obtain the product BTiO 2 Sol.

[0027] The product A SiO 2 Sol and product B TiO 2 The sol was mixed and stirred at 50°C for 12 hours to obtain the product CTiO 2 / SiO 2 Sol.

[0028] At 80℃, the product C TiO 2 / SiO 2 The sol was dried under vacuum to obtain catalyst D.

[0029] The product C TiO 2 / SiO 2 The sol was freeze-dried to obtain catalyst E.

[0030] The product C TiO 2 / SiO 2 The sol is placed in a semi-permeable membrane and placed in deionized water to remove Cl - , Get catalyst F.

[0031] The product C TiO 2 / SiO 2 React with 0.3 g of caprolactam to obtain catalyst G...

Example Embodiment

[0034] Example 2: Preparation of polyester polycondensation catalyst

[0035] Take 5 mL of concentrated hydrochloric acid, 10 mL of ethanol, mix with 19.6 g of ethyl orthosilicate (TEOS) at room temperature, and stir for 1 hour to obtain the product A SiO 2 Sol.

[0036] Take 2.5g TiCl 4 Add 20ml EG dropwise at 0℃, and pass in dry NH 3 The gas is prepared according to the Nelles method provided in the following literature, but the product is not hydrolyzed, and then it is supported on SiO 2 Above the sol: Li Dacheng, Zhou Dali, Chen Chaozhen, etc. Synthesis of Titanium Ethoxide and Preparation of TiO by Hydrolysis 2 Research on Micropowder[J]. Functional Materials, 1995, 26(3):278-282.

[0037] In the above preparation steps, quickly add the resulting product to A to obtain TiO 2 / SiO 2 Sol J.

[0038] J was freeze-dried under vacuum to obtain catalyst K.

[0039] Treat J with a low-temperature hydrothermal method, with a hydrothermal temperature of 50-200°C and a hydrothermal time of ...

Example Embodiment

[0046] Example 3. Application of polyester polycondensation catalyst as a catalyst in the preparation of polyester materials

[0047] The steps for preparing PET polyester material using the polyester polycondensation catalyst provided in Example 1 of the present invention are as follows:

[0048] Take 86.4 g of terephthalic acid and 32.3 g of ethylene glycol, and carry out esterification under the conditions of a pressure of 0.3 MPa and a temperature of 220-250° C. until the theoretical value of water is evaporated. 1 mg of one of the catalysts prepared in Example 1 (catalyst D-I) was added to obtain PET material N-S, respectively. The polycondensation time and product properties are shown in Table 2.

[0049] It can be seen from the data in Table 2 that the electron binding energy of titanium and the particle size of the catalyst greatly affect the activity of the catalyst: for catalysts D, E, and F, the particle size decreases in order, the activity increases, and the product per...

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Abstract

The invention discloses a polyester polycondensation catalyst and a preparation method and application thereof. The preparation method of the polyester polycondensation catalyst comprises the following steps of: reacting TiO2/SiO2 sol with a nitrogenous or phosphorous compound; and controlling the grain size of a product to obtain the polyester polycondensation catalyst. The preparation method of the polyester polycondensation catalyst has a simple and convenient process, is easy to operate and is suitable for large-scale industrial production; besides, the catalyst provided by the invention has high catalytic efficiency, not only can catalyze the polymerization of aromatic polyesters and co-polyesters thereof, but also can catalyze the polymerization of aliphatic polyesters and co-polyesters thereof by changing the proportions of components of the catalyst and adjusting and controlling the activity of the catalyst, and has extensive application prospects.

Description

technical field [0001] The invention relates to a polyester polycondensation catalyst, a preparation method and application thereof. Background technique [0002] Polyester is a very important material. Due to its good mechanical properties, thermal and chemical stability and low cost, it is widely used in packaging, transportation, textiles, construction, etc. and is closely related to people's daily life. field. Now, my country has become the world's largest polyester producer, and the domestic polyester production in 2007 has exceeded 20 million tons. [0003] Although the scale of polyester production in my country is relatively large, the main catalysts used in domestic polyester production facilities are antimony-based catalysts that are potentially toxic to the human body and the environment. Polyester materials prepared by using antimony-based catalysts have relatively stable comprehensive properties, but due to the toxicity of antimony and the disadvantages of gra...

Claims

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Application Information

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IPC IPC(8): C08G63/87C08G63/85C08G63/183C08G63/16C08G64/30
Inventor 冯润财殷明李春成张栋管国虎肖耀南
Owner INST OF CHEM CHINESE ACAD OF SCI
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