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Preparation method of easy-to-degrade adipic acid polyethylene glycol polyester

A technology of polyethylene glycol polyester and polyethylene glycol, which is applied in the field of preparation of easily degradable adipic acid polyethylene glycol polyester, can solve the problems of ethylene glycol loss and difficulty in molecular weight, and achieves improved efficiency. efficiency, cost reduction, and product appearance improvement

Active Publication Date: 2017-01-25
ZHEJIANG HUANGMA TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Wang Ying published "Synthesis of Polyethylene Glycol Ester" in chemical technology. Products using ethylene glycol as raw materials have loss of ethylene glycol, and it is difficult to make high molecular weight.

Method used

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  • Preparation method of easy-to-degrade adipic acid polyethylene glycol polyester
  • Preparation method of easy-to-degrade adipic acid polyethylene glycol polyester

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0028] In the preparation method of this embodiment, the esterification reaction equation is:

[0029]

[0030] m:n=1:1-2.

[0031] For compounding, add the remaining polyethylene glycol by adding while stirring.

Embodiment 1

[0033] Add 528 grams of polyethylene glycol with a molecular weight of 528 and 146 grams of adipic acid to the flask and add 1.3 grams of p-toluenesulfonic acid and 0.4 grams of phosphorous acid catalyst under stirring. The temperature is raised to 135°C in 4 hours, and the resulting product is removed in time by vacuum -0.096MPa Water, after keeping the temperature at 135-140℃ for 3 hours, cooling to 80℃, adding 264 grams of polyethylene glycol, stirring at 70-80℃ for 1 hour to obtain a light yellow color (color less than 50 platinum cobalt standard) Transparent product. This embodiment has reasonable process, simple operation, stable product, excellent smooth diffusion and lubricity, good isolation and demoulding effect, and easy biodegradability.

[0034] Take 50ml of an aqueous solution with a product concentration of 10% and put it in a 250ml Erlenmeyer flask, add 25% of the inoculation amount, shake it at 30°C for 5h, measure COD, and calculate the degradation rate of 58.2%....

Embodiment 2

[0038] Add 528 grams of polyethylene glycol with a molecular weight of 528 and 146 grams of adipic acid to the flask and add 1.3 grams of p-toluenesulfonic acid and 0.4 grams of phosphorous acid catalyst under stirring. The temperature is raised to 135°C in 4 hours, and the resulting product is removed in time by vacuum -0.096MPa After holding water for 3 hours under the reaction conditions of 135-140℃, the temperature is lowered to 80℃, adding 422 grams of polyethylene glycol, stirring at 70-80℃ for 1 hour to obtain a slightly yellow color (color less than 50 platinum cobalt standard) Transparent product. This embodiment has reasonable process, simple operation, stable product, excellent smooth diffusion and lubricity, good isolation and demoulding effect, and easy biodegradability.

[0039] Take 50ml of an aqueous solution with a product concentration of 10% and put it in a 250ml Erlenmeyer flask, add 25% of the inoculation amount, shake it at 30°C for 5h, measure COD, and calcu...

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Abstract

The invention relates to a preparation method of easy-to-degrade adipic acid polyethylene glycol polyester and belongs to the technical field of ester compounds in organic chemistry. The preparation method includes: adding part of polyethylene glycol into adipic acid, stirring, adding a catalyst, and raising temperature; removing generated water in a vacuum condition, holding temperature of 120-140 DEG C for reaction for 2-5h, lowering temperature, adding remaining polyethylene glycol, and stirring at 70-80 DEG C for 0.5-2.5h to obtain a finished product. When being applied to adipic acid polyethylene glycol polyester, the preparation method has the advantages that the process is reasonable, operation is simple, and the product is stable, short in reaction period and shallow in color.

Description

Technical field [0001] The invention relates to a preparation method of easily degradable adipic acid polyethylene glycol polyester, which belongs to the technical field of ester compound preparation in organic chemistry. Background technique [0002] Polyethylene glycol adipic acid polyester is a polymer used as a diffusion lubricant in metal cutting. It is used as a release agent in rubber production. It has good smoothness, dispersion, isolation and release properties. Environmentally friendly, it has better demoulding effect than polyethylene glycol alone. Due to the unique properties of oil and fat surfactants, wide range of uses, and the low toxicity and low irritation of oil products, the development and research of oil and fat surfactants has attracted more and more attention. At the same time, improving the biodegradability of surfactants is an important guarantee for achieving a good ecological environment. [0003] At present, there are many reports on the synthesis of...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G63/672C08G63/87C08G63/78
CPCC08G63/672C08G63/78C08G63/87C08G2230/00
Inventor 刘志湘金一丰万庆梅陈世明余渊荣
Owner ZHEJIANG HUANGMA TECH
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