A kind of lactide ring-opening polymerization catalyst composition and preparation method thereof

A technology of ring-opening polymerization and catalyst, applied in the field of lactide ring-opening polymerization catalyst composition and preparation thereof, can solve the problems of cytotoxicity, influence the performance of polylactic acid products, poor catalyst stability, etc. High ring conversion rate and good stability

Active Publication Date: 2022-05-10
安徽英特力工业工程技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to solve the problems of existing catalysts such as poor stability, cytotoxicity, and affecting the performance of polylactic acid products, and propose a lactide ring-opening polymerization catalyst composition and its preparation method

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  • A kind of lactide ring-opening polymerization catalyst composition and preparation method thereof
  • A kind of lactide ring-opening polymerization catalyst composition and preparation method thereof

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Embodiment 1

[0024]The invention provides a lactide ring opening polymerization catalyst composition, which comprises the following raw materials by weight: 20 parts of zinc oxide, 7 parts of yttrium oxide, 2 parts of triethanolamine, 1 part of n-octacosanol, 2 parts of bis triphenylphosphorus palladium dichloride, 4 parts of triisopropyl methylsilyl trifluoromethane sulfonate, 2 parts of composite decolorizer, 2 parts of activated carbon and 10 parts of activated alumina.

[0025] The preparation method comprises the following steps:

[0026] S1. Dilute and mix the triethanolamine of the specific gravity with water 5 times its total mass by weight, add zinc oxide and yttrium oxide, and vibrate with ultrasonic for 20 minutes to obtain the mixed solution I;

[0027] S2. First add the specific gravity of n-octacosanol and ditriphenylphosphorus palladium dichloride into the mixed solution I, heat up to 78 ℃ while stirring, mix evenly, and then add triisopropyl silyl trifluoromethane sulfonate wit...

Embodiment 2

[0030] The invention provides a lactide ring opening polymerization catalyst composition, which comprises the following raw materials by weight: 28 parts of zinc oxide, 10 parts of yttrium oxide, 3.5 parts of triethanolamine, 5 parts of n-octacosanol, 2.5 parts of bis triphenylphosphorus palladium dichloride, 6 parts of triisopropyl methylsilyl trifluoromethane sulfonate, 3.5 parts of composite decolorizer, 3.5 parts of activated carbon and 15 parts of activated alumina.

[0031] The preparation method comprises the following steps:

[0032] S1. According to the weight part, dilute and mix the triethanolamine with the specific gravity with water 6 times its total mass, add zinc oxide and yttrium oxide, and vibrate with ultrasonic for 25min to obtain the mixed solution I;

[0033] S2. First add the specific gravity of n-octacosanol and ditriphenylphosphorus palladium dichloride into the mixed solution I, heat up to 92 ℃ while stirring, mix evenly, and then add triisopropyl silyl tr...

Embodiment 3

[0036] The invention provides a lactide ring opening polymerization catalyst composition, which comprises the following raw materials by weight: 35 parts of zinc oxide, 15 parts of yttrium oxide, 5 parts of triethanolamine, 12 parts of n-octacosanol, 3 parts of bis triphenylphosphorus palladium dichloride, 8 parts of triisopropyl methylsilyl trifluoromethane sulfonate, 5 parts of composite decolorizer, 5 parts of activated carbon and 20 parts of activated alumina.

[0037] The preparation method comprises the following steps:

[0038] S1. Dilute and mix the triethanolamine of the specific gravity with water 7 times its total mass by weight, add zinc oxide and yttrium oxide, and vibrate with ultrasonic for 30min to obtain the mixed solution I;

[0039] S2. First add the specific gravity of n-octacosanol and ditriphenylphosphorus palladium dichloride into the mixed solution I, heat up to 95 ℃ while stirring, mix evenly, and then add triisopropyl silyl trifluoromethane sulfonate with...

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Abstract

The invention belongs to the technical field of polylactic acid catalysts, in particular to a lactide ring-opening polymerization catalyst composition and a preparation method thereof, which solves the problems of poor catalyst stability, cytotoxicity, and affecting the performance of polylactic acid products in the prior art. The lactide ring-opening polymerization catalyst composition includes the following raw materials: zinc oxide, yttrium oxide, triethanolamine, n-octacosanol, bistriphenylphosphine palladium dichloride, triisopropylsilyltri Fluoromethanesulfonate, compound decolorizer, activated carbon, activated alumina. The catalyst composition of the invention has good stability, high catalytic efficiency and no cytotoxicity, and the yield of polylactic acid formed by catalyzing the ring-opening polymerization of lactide is high.

Description

technical field [0001] The invention relates to the technical field of polylactic acid catalyst, in particular to a lactide ring opening polymerization catalyst composition and a preparation method thereof. Background technology [0002] Polylactic acid is a polymer obtained by polymerization with lactic acid as the main raw material. It is a new type of biodegradable material. It has good thermal stability, processing temperature of 170 ~ 230 ℃, and has good solvent resistance. It can be processed in many ways, such as extrusion, spinning, biaxial stretching and injection blow molding. At present, there are various synthetic methods of polylactic acid, including direct condensation, lactide ring opening polymerization and other synthetic methods. Due to the limitation of reaction conditions, such as the accumulation of water and the increase of reaction viscosity, the molecular weight of polylactic acid synthesized by direct method is low, which will further affect the related p...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G63/83C08G63/84C08G63/08
CPCC08G63/823C08G63/83C08G63/84C08G63/08
Inventor 刘兴然张华宋钊李炳亮黄海洋陈宇
Owner 安徽英特力工业工程技术有限公司
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