Preparation method of polyester plasticizer as well as product and application thereof

A polyester plasticizer and polyester technology, applied in the field of polyester plasticizer and rubber additives, can solve the problems of long time required and slow enzyme-catalyzed reaction speed, and achieve the effect of reducing reaction energy consumption and polycondensation reaction Good effect of lifting and thermal stability

Active Publication Date: 2021-12-14
BEIJING UNIV OF CHEM TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the method disclosed in this patent, the reaction conditions for enzyme-catalyzed synthesis of itaconic acid polyester are mild, which reduces energy consumption, but the enzyme-catalyzed reaction is slow and takes a long time

Method used

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  • Preparation method of polyester plasticizer as well as product and application thereof
  • Preparation method of polyester plasticizer as well as product and application thereof
  • Preparation method of polyester plasticizer as well as product and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] (1) Using succinic acid, butanediol, and 1,3-propanediol as raw materials, the molar ratio of alkyd to acid is 1.5:1, carry out esterification reaction at normal pressure, under the protection of nitrogen, heat up to 120°C, and continue to stir Reaction 3h makes prepolymer;

[0045] (2) Under the protection of nitrogen, reduce the temperature to 70°C, add Novozym435 (5wt%, calculated based on the total mass of the substrate), and open the vacuum device, control the pressure to 500Pa, carry out decompression to remove water, and react for 12h to obtain poly crude ester;

[0046] (3) Mix the crude polyester and polydimethylsiloxane at a molar ratio of 1:0.2, in dibutyltin dilaurate (the amount is 5‰ of the total molar mass of the crude polyester and polydimethylsiloxane) Carry out the grafting reaction under the action, the initial reaction temperature is 140°C, the time is 1h, the temperature is gradually raised to 180°C, the reaction is 3h, and the modified polyester c...

Embodiment 2

[0049] (1) Use adipic acid, butanediol, 1,3-propanediol, and the molar ratio of alkyd to 1.5:1 to carry out esterification reaction at normal pressure. Under the protection of nitrogen, heat up to 120°C and continue to stir for 3 hours. Prepare the prepolymer;

[0050] (2) Under the protection of nitrogen, reduce the temperature to 70°C, add Novozym435 (5wt%, calculated based on the total mass of the substrate), and open the vacuum device, control the pressure to 500Pa, carry out decompression to remove water, and react for 12h to obtain poly crude ester;

[0051] (3) Mix the crude polyester and polydimethylsiloxane at a molar ratio of 1:0.2, in dibutyltin dilaurate (the amount is 5‰ of the total molar mass of the crude polyester and polydimethylsiloxane) Carry out the grafting reaction under the action, the initial reaction temperature is 140°C, the time is 1h, the temperature is gradually raised to 180°C, the reaction is 3h, and the modified polyester crude product is obtai...

Embodiment 3

[0054] (1) Using succinic acid, sebacic acid, pentanediol, octanediol, and hexanediol as raw materials, the alkyd acid molar ratio is 1.5:1, carry out esterification reaction at normal pressure, and heat up under the protection of nitrogen To 120°C, continue stirring for 3 hours to prepare the prepolymer;

[0055] (2) Under the protection of nitrogen, reduce the temperature to 70°C, add Novozym435 (5wt%, calculated based on the total mass of the substrate), and open the vacuum device, control the pressure to 500Pa, carry out decompression to remove water, and react for 12h to obtain poly crude ester;

[0056] (3) Mix the crude polyester and polydimethylsiloxane at a molar ratio of 1:0.2, in dibutyltin dilaurate (the amount is 5‰ of the total molar mass of the crude polyester and polydimethylsiloxane) Carry out the grafting reaction under the action, the initial reaction temperature is 140°C, the time is 1h, the temperature is gradually raised to 180°C, the reaction is 3h, and...

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Abstract

The invention discloses a preparation method of a polyester plasticizer as well as a product and application thereof. The method comprises the following steps: carrying out esterification reaction on a dihydric alcohol and binary acid mixture in a nitrogen atmosphere to obtain a prepolymer; adding lipase into the prepolymer for condensation polymerization to obtain a polyester crude product ; by taking a polyester crude product and polydimethylsiloxane as raw materials, carrying out grafting reaction under the action of a catalyst to obtain a modified polyester crude product; and separating and purifying the obtained modified polyester crude product to obtain the polyester plasticizer. The method has the advantages of greenness, environmental protection, less side reaction, less solvent consumption, small dispersion coefficient, simplicity in operation, controllable molecular weight and the like. The obtained polyester plasticizer has the characteristics of extraction resistance, migration resistance and no toxicity, and can significantly improve the mechanical properties and low temperature resistance of NBR.

Description

technical field [0001] The invention belongs to the field of polyester plasticizers and rubber additives, and in particular relates to a preparation method of polyester plasticizers, products and applications thereof. Background technique [0002] Nitrile-butadiene rubber (NBR) is a synthetic rubber widely used in automobiles, aviation, construction and other fields. It is an unsaturated polymer obtained by copolymerizing two monomers, butadiene and acrylonitrile. NBR has good oil resistance and wear resistance, etc., but the existence of acrylonitrile with high polarity leads to poor cold resistance, but reducing the proportion of acrylonitrile in NBR will reduce the oil resistance. Therefore, it is necessary to find a suitable high Molecular additives improve its low temperature resistance and broaden the service temperature range of rubber products. [0003] Plasticizer is a kind of solvent-like additive, which can not only improve the processability of materials, but al...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G77/445C08L9/02C08L83/10
CPCC08G77/445C08L9/02C08L83/10
Inventor 于跃邓利韩志跃王芳杨众杨兴
Owner BEIJING UNIV OF CHEM TECH
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