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Polymer polyol containing furan ring structure and preparation method thereof

A polyol and polymer technology, applied in the field of organic polymer compounds, to achieve the effects of high mechanical strength, small process differences and mild polymerization conditions

Pending Publication Date: 2022-07-26
DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to solve the obvious performance defects of polyurethane materials prepared based on commercialized polyester polyols in terms of water resistance, salt spray resistance and humidity and heat alternation, and to provide a new type of poly(ether) containing a furan ring structure. ) ester and its preparation method, the polymerization process has no obvious difference compared with the existing polyester polyol route, but the process conditions are milder, safer and energy-saving. The polyurethane product based on this new poly(ether) ester polyol has excellent comprehensive performance , especially in terms of water resistance, salt spray resistance and heat and humidity resistance, which are far superior to commercial polyester polyols. The product has broad application prospects and great industrial value

Method used

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  • Polymer polyol containing furan ring structure and preparation method thereof
  • Polymer polyol containing furan ring structure and preparation method thereof
  • Polymer polyol containing furan ring structure and preparation method thereof

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Experimental program
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Effect test

Embodiment approach

[0035] In an embodiment of the technical solution of the present invention, the poly(ether) ester containing furan ring structure and the preparation method thereof, a certain molar ratio of dibasic acid, small molecular polyol and a certain amount of metal catalyst are added with stirring, distillation , in the reactor with nitrogen and vacuum functions, follow the following steps:

[0036] ① Replace the system with a nitrogen protective atmosphere, and when heated to a certain temperature, water is formed and steamed out, and the reaction is maintained at this temperature for 2 to 3 hours. At this time, the system has no obvious water effusion phenomenon;

[0037] ②Slowly heat up to 190-240°C in a stepwise manner at a certain rate, and keep the reaction at each temperature for a period of time, and turn on the vacuum at the same time, control the vacuum degree to gradually decrease from 3000 Pa to 100 Pa with the system temperature, and react in this state For 1 to 3 hours, ...

Embodiment 1

[0050] Example 1 (design theoretical number average molecular weight is 1000, hydroxyl value is 112mgKOH / g, acid value is 0.5mgKOH / g, 1,6-adipic acid, 2,5-furandicarboxylic acid and ethylene glycol system polyester two alcohol, wherein the molar ratio of 1,6-adipic acid to 2,5-furandicarboxylic acid is 7:3)

[0051] Weigh 44 grams of ethylene glycol, 56 grams of 1,6-adipic acid, and 33 grams of 2,5-furandicarboxylic acid, respectively, and add them to a 250-milliliter mixture equipped with stirring, distillation, nitrogen and vacuum functions. In the four-necked flask, under nitrogen, the temperature of the system was raised to 135 °C, and the system began to generate water. After maintaining the reaction at this temperature for 1.5 hours, there was basically no obvious water effusion phenomenon. And according to the heating rate of 15 ℃ / min, the temperature of the system was raised to 190 ℃, the vacuum degree was gradually reduced to 2000 Pa, kept in this state for 10 minutes...

Embodiment 2

[0052] Example 2 (design theoretical number average molecular weight is 1000, hydroxyl value is 112mgKOH / g, acid value is 0.5mgKOH / g, 2,5-furandicarboxylic acid and ethylene glycol system polyester diol)

[0053] Weigh 44 grams of ethylene glycol and 86 grams of 2,5-furandicarboxylic acid, respectively, and add them to a 250-ml four-necked flask equipped with stirring, distillation, nitrogen and vacuum functions. The temperature rises to 130°C, and the system begins to generate water. After maintaining the reaction at this temperature for 2 hours, there is basically no obvious water effusion phenomenon. The vacuum is started, and the vacuum degree is controlled to 3000 Pa, and the system is heated at a rate of 15°C / min. The temperature rose to 190°C, the vacuum degree was gradually reduced to 2000 Pa, kept in this state for 10 minutes, then heated to 200°C at the same rate, the vacuum degree was gradually lowered to 1500 Pa, the reaction was carried out for 10 minutes, and then...

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Abstract

The invention discloses a polymer polyol containing a furan ring structure and a preparation method of the polymer polyol, and belongs to the technical field of organic high-molecular compounds, the relative molecular mass of the polymer polyol is 1000-4000, and the molecular main chain contains a furan ring. The polyester polyol provided by the invention has the following characteristics: the polymerization condition is mild, the difference from the existing industrial polyester process is small, the industrialization of a universal device can be basically realized, the poly (ether) ester structure is controllable, the rigidity and flexibility of a molecular main chain are adjustable, and the polyester polyol can be dissolved in a common solvent for polyurethane reaction; and the polyurethane can be applied to downstream polyurethane processing and provides excellent performances of high mechanical strength, heat resistance, aging resistance, oil resistance, water resistance, biodegradability and the like for products.

Description

technical field [0001] The invention relates to a polymer polyol containing a furan ring structure and a preparation method thereof, belonging to the technical field of organic polymer compounds. Background technique [0002] Polymer polyols are one of the key raw materials that determine the properties of polyurethane materials. Among them, polyester polyols in bulk commercial series are almost all prepared by dehydration and polycondensation of simple adipic acid and polyols with small molecular structures under vacuum and high temperature conditions. Polyurethane products based on polyester polyols with this structure are widely used in the fields of shock absorption and noise reduction, sealing rings, adhesives and coatings due to their excellent properties such as high mechanical strength, oil resistance, heat resistance and aging resistance. In order to improve these properties, the common practice in the industry is to introduce a small proportion of ortho, meta, and ...

Claims

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Application Information

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IPC IPC(8): C08G63/672C08G63/668C08G18/42
CPCC08G63/672C08G63/668C08G18/4258
Inventor 周光远刘佳姜敏
Owner DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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