Preparation method of dimer acid type polyester polyol

A technology of polyester polyol and dimer acid type, which is applied in the field of preparation of dimer acid type polyester polyol, can solve problems affecting the application of polyurethane, insufficient resistance to hydrolysis, anti-oxidation, and anti-ultraviolet decomposition, etc., and achieve operating costs Low cost, stable product quality and high product yield

Inactive Publication Date: 2013-05-22
江苏永林油脂科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Conventional polyester polyol products such as polybutylene adipate and polyethylene adipate have deficiencies in anti-hydrolysis, anti-oxidation, anti-ultraviolet decomposition, etc., which affect the low temperature resistance Applications in polyurethane industry with special requirements such as elastomers, anti-corrosion paints, and marine coatings

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1

[0027] Example one, add high-purity dimer acid 496g, adipic acid 496g, neopentyl glycol 567g, add catalyst dibutyltin dilaurate 0.2 in the four-necked flask that has thermometer, mechanical stirrer, condenser and nitrogen feed pipe. g, Turn on stirring and heating to raise the temperature, slowly raise the temperature, control the stirring speed to 300n / min, and the system nitrogen protection micro positive pressure at 1050Pa, when the temperature of the material rises to 140°C, water will start to flow out, at this time control the heating speed, the temperature rising rate is 20- --25°C / h, to gradually evaporate the generated water. When the temperature of the material rises to 160-170°C, keep it warm for about 2 hours, and continue to slowly heat up to 200°C to react. Then, turn off the nitrogen, turn on the vacuum pump, and pump under reduced pressure. Vacuum, control the vacuum degree to 740mmHg, slowly raise the temperature to 225°C, keep the reaction for about 3 hours, t...

example 2

[0028] Example two, add high-purity dimer acid 496g, adipic acid 496g, diethylene glycol 578g, add catalyst tetrabutyl titanate 0.1 g, Turn on stirring and heating to raise the temperature, slowly raise the temperature, control the stirring speed to 300n / min, and the system nitrogen protection micro positive pressure at 1050Pa, when the temperature of the material rises to 140°C, water starts to flow out, at this time control the heating speed, the temperature rising rate is 20- --25°C / h, to gradually evaporate the generated water. When the temperature of the material rises to 160-170°C, keep it warm for about 2 hours, and continue to slowly heat up to 200°C to react. Then, turn off the nitrogen, turn on the vacuum pump, and pump under reduced pressure. Vacuum, control the vacuum degree to 740mmHg, slowly raise the temperature to 225°C, keep the reaction for about 3 hours, take a sample to measure the acid value is less than 1mgKOH / g, after the reaction is completed, slowly coo...

example 3

[0029] Example three, add 560g of high-purity dimer acid, 1070g of dimer alcohol, and 0.1g of catalyst tetrabutyl titanate in a four-necked flask with a thermometer, a mechanical stirrer, a condenser and a nitrogen inlet pipe, and start stirring and heating Raise the temperature, raise the temperature slowly, control the stirring speed at 300n / min, protect the system with nitrogen at a slight positive pressure of 1050Pa, when the temperature of the material rises to 140°C, water will start to flow out, at this time control the heating speed, the temperature rising rate is 20---25°C / h , so that the generated water is gradually evaporated. When the temperature of the material rises to 160-170 ° C, keep the temperature for about 2 hours, continue to slowly raise the temperature to 200 ° C for the reaction, then turn off the nitrogen, turn on the vacuum pump, depressurize and evacuate, and control the vacuum degree to 740mmHg , slowly raise the temperature to 225°C, keep the reacti...

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PUM

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Abstract

The invention provides a preparation method of dimer acid type polyester polyol, belonging to the technical field of esterification polymerization in oil chemistry. The method comprises the following steps of: carrying out esterification polymerization reaction in the presence of an organic catalyst under the protection of nitrogen based on long-chain dimer acid of binary acid and dihydric alcohol as main raw materials; and further carrying out vacuum dehydration and demonomerization to obtain dimer acid type polyester polyols of different specifications, wherein the acid value is lower than 1mgKOH / g, and the number-average molecular weight is lower than 1,300-3,000. The preparation method provided by the invention has the characteristics of easy technical operation, high product yield, stable product quality and low operation cost.

Description

technical field [0001] The invention relates to a preparation method of dimer acid type polyester polyol. It belongs to the comprehensive utilization field of oil chemical industry. Background technique [0002] Conventional polyester polyol products such as polybutylene adipate and polyethylene adipate have deficiencies in anti-hydrolysis, anti-oxidation, anti-ultraviolet decomposition, etc., which affect the low temperature resistance Elastomers, anti-corrosion paints, marine coatings, etc. have special requirements for applications in the polyurethane industry. Contents of the invention [0003] The purpose of the invention is to change the structure of polyester polyol and improve the comprehensive performance of polyester polyol. For this reason, the invention provides a kind of preparation method of dimer acid type polyester polyol. [0004] The preparation method of dimer acid type polyester polyol provided by the present invention is to utilize dibasic acid unit...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G63/16C08G63/672C08G18/42C09D175/06C09J175/06
Inventor 钟民强徐建彬
Owner 江苏永林油脂科技有限公司
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