Nanometer composite catalyst for synthesis of polyester and copolyester, and synthetic method for polyester and copolyester

A polyester copolyester and nanocomposite technology is applied in the field of nanocomposite catalyst for synthesizing polyester copolyester and polyester and copolyester synthesis. Good performance and large specific surface area

Inactive Publication Date: 2011-10-26
ZHEJIANG BILI PACKAGING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Titanium catalyst is characterized by high activit

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] In a four-necked flask equipped with a condenser and a stirrer, add 90g of terephthalic acid, 110g of 1,4-butanediol and 0.5g of isopropyl titanate, pass through N2 protection, and raise the temperature to 180°C under normal pressure ,React at constant temperature for 2 hours, then add 70g adipic acid and 0.5g lanthanum acetylacetonate, under the protection of N2, react at 190°C for 3h, under the condition of 200°C, reduce the pressure to 40kPa, add 0.03g stabilizer phosphorous acid Triphenyl ester, react for 1.5h, under the condition of slow stirring, slowly add 0.04g of nano-titanium, silicon composite metal catalyst, reduce the pressure to 400Pa, raise the temperature to 270°C at the same time, add 0.25g of diisocyanate, react for 7h to end the reaction. Tested by GPC, the weight average molecular weight of the polymer is 150,000, and the distribution index is 2.1.

Embodiment 2

[0044] In a four-necked flask equipped with a condenser and agitator, add 100g dimethyl terephthalate, 120g 1,4-butanediol and 0.25g anhydrous zinc acetate, feed N2 protection, and heat up to 160°C, constant temperature reaction for 2 hours, then add 70g adipic acid and 0.4g lanthanum acetylacetonate, under the protection of N2, react at 190°C for 3h, under the condition of 200°C, reduce the pressure to 30kPa, add 0.04g stabilizer Triphenyl phosphite, react for 1.5h, under the condition of slow stirring, slowly add 0.03g of nano-titanium, silicon composite metal catalyst, reduce the pressure to 400Pa, at the same time raise the temperature to 270°C, add 0.25g of diisocyanate, react for 6h to end the reaction . Through the GPC test, the weight average molecular weight of the polymer is 163,000, and the distribution index is 2.4.

Embodiment 3

[0046] In the four-necked flask that condenser, agitator are equipped with, add 78g terephthalic acid, 120g 1,4-butanediol and 0.04g nano-titanium, silicon composite metal catalyst, pass into N Protection, be warming up to at normal pressure 180°C, constant temperature reaction for 2 hours, then add 70g adipic acid, under the protection of N2, react at 190°C for 3h, under the condition of 200°C, reduce the pressure to 30kPa, add 0.03g stabilizer tributyl phosphate, react 1.5h, reduce the pressure to 400Pa, and raise the temperature to 270°C at the same time, add 0.25g of trimellitic anhydride, and react for 6h to end the reaction. Through the GPC test, the weight average molecular weight of the polymer is 156,000, and the distribution index is 2.3.

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PUM

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Abstract

The nanometer composite catalyst disclosed by the present invention is a compound which comprises nano-titanium, nano-silicon and a metal element selected from groups IA, IIA, IIIA, IVA, IIB, IIIB, IVB and VIII elements. A synthetic method provided by the present invention comprises the following steps: a) carrying out an esterification or a ester exchange reaction, then adding aromatic dibasic acids or aromatic dibasic ester and aliphatic diol to a reaction vessel according to a certain ratio, and simultaneous adding catalysts for the esterification; b) carrying out a pre polycondensation at a certain reaction temperature under a certain reaction pressure, followed by a polycondensation at a certain reaction temperature under a certain reaction pressure.

Description

technical field [0001] The invention relates to a catalyst for synthesizing polyester and copolyester and a method for synthesizing polyester and copolyester with a weight average molecular weight of 150,000-200,000 by using the catalyst. Background technique [0002] In recent years, biodegradable polymer materials have been considered as one of the main ways to solve the increasingly serious "white pollution" problem caused by traditional plastic products. Aliphatic polyester is currently the most researched fully biodegradable polymer material. This type of material is easily decomposed and metabolized by various microorganisms in nature or enzymes in animals and plants, and finally decomposed into carbon dioxide and water. It is safe and non-toxic, and has biological properties. Compatibility and bioabsorbability. [0003] This aliphatic polyester has good biocompatibility and biodegradability, but has a low melting point and heat distortion temperature. Aromatic polye...

Claims

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Application Information

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IPC IPC(8): C08G63/82C08G63/87C08G63/85C08G63/183
Inventor 王彤
Owner ZHEJIANG BILI PACKAGING
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