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Acrylic polyurethane having star-structure six functional groups and synthesizing method thereof

A technology of acrylic polyurethane and star structure, applied in the field of acrylic polyurethane and its synthesis, to achieve the effects of excellent mechanical properties, fast curing speed and large shielding effect

Inactive Publication Date: 2008-04-09
HUNAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The technical problem to be solved by the present invention is to overcome the defects of the above-mentioned prior art, introduce dipentaerythritol with a hexafunctional group spatial structure, and provide a class of non-toxic, non-irritating, good stability, excellent performance, simple synthesis method and no environment. Polluted acrylic polyurethane with star structure hexafunctional group and its synthesis method

Method used

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  • Acrylic polyurethane having star-structure six functional groups and synthesizing method thereof
  • Acrylic polyurethane having star-structure six functional groups and synthesizing method thereof
  • Acrylic polyurethane having star-structure six functional groups and synthesizing method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0036] In a 1000ml stirred three-neck flask, 50g of dipentaerythritol, 203.8g of toluene-2,4 diisocyanate (TDI) and 0.076g of catalyst dibutyltin dilaurate were added. Control the temperature and react at 18°C ​​for 100 minutes, take a sample to determine the isohydrogen content of 19.4025% (mass concentration), add 151.8g of hydroxyethyl acrylate, and add 1.214g of polymerization inhibitor p-hydroxyanisole. Control the temperature and react at 22° C. for 5 hours, then take a sample to measure the isohydrogen content of 0.1643% (mass concentration), stop the reaction, and obtain 406.9 g of the product, which is colorless, clear and transparent.

Embodiment 2

[0038] In a 3000ml stirred three-neck flask, 235g of dipentaerythritol, 965.7g of toluene-2,4 diisocyanate (TDI) and 0.262g of catalyst dibutyltin dilaurate were added. The temperature was controlled at 25°C for 90 minutes, and the isohydrogen content was determined to be 19.5276% (mass concentration) by sampling. 654 g of hydroxyethyl acrylate was added, and 4.578 g of polymerization inhibitor 2,6-di-tert-butyl-p-cresol was added simultaneously. After controlling the temperature to react at 31° C. for 4 hours, sampling and determination of the isohydrogen content was 0.1342% (mass concentration), and the reaction was stopped to obtain 1.859 kg of the product, which was colorless, clear and transparent.

Embodiment 3

[0040] In a 20L pilot scale reactor, 1.5kg of dipentaerythritol, 6.17kg of toluene-2,4 diisocyanate (TDI) and 1.27g of catalyst dibutyltin dilaurate were added. The temperature was controlled at 37° C. for 80 minutes, and the isohydrogen content was determined to be 19.4852% (mass concentration) by sampling. 4.22 kg of hydroxyethyl acrylate was added, and 25.3 g of a polymerization inhibitor triphenylphosphine was added at the same time. After controlling the temperature to react at 43°C for 3.5 hours, sampling and determination of the isohydrogen content was 0.1275% (mass concentration), and the reaction was stopped to obtain 11.917 kg of the product, which was colorless, clear and transparent.

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Abstract

The invention relates to an acrylic polyurethane containing stelliform-structure six functional groups and synthetic method, wherein, the compound is made through combining dipentaerythritol, diisocyanate and hydroxyethyl methacrylate. The synthetic method is that the dipentaerythritol and the diisocyanate are put in a reactor, the catalyst is put in then and stirred to increase the temperature, with the temperature is 10 to 90 DEG C and the period of the reaction is 30 to 100 minutes. When the content (quality consistency) of the isocyanate acid sampled and tested reaches 13.8 percent to 22 percent, the hydroxyethyl methacrylate and inhibitive substance are put in when the reaction temperature is between 20 and 100 DEG C and the temperature lasts for 1 to 5 hours. When the content of the isocyanate acid sampled and tested is less than 0.2 percent, the reaction is stopped the material is discharged. The resin of typically stelliform. The structure is innocuous and nonirritating, and having the advantages of good stability, well performance, simple synthetic method and easy operation causing no environmental pollution.

Description

technical field [0001] The invention relates to a class of acrylic polyurethane with six functional groups in a star structure and a synthesis method thereof. Background technique [0002] With the gradual deepening of human understanding of the environment, choosing green products to replace traditional products or developing new uses has attracted more and more attention. Shuangji derivatives are non-toxic, environmentally friendly, and safe for human bodies, becoming an important "green" in the future. "One of the raw materials, it has broad application prospects. There are multiple hydroxyl groups in the biquaternary molecule, which provides a lot of space for its chemical modification. At present, the modification mainly focuses on the two aspects of crosslinking and graft copolymerization. Different fatty acids can be selected according to the application to generate a series of biquaternary molecules. Derivatives endow Shuangji derivatives with new and excellent func...

Claims

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Application Information

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IPC IPC(8): C07C271/08C07C269/02C08G18/67
Inventor 曾光明单文伟贺迅潘东营范燃汤琳
Owner HUNAN UNIV
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