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Light color modified isocyanate mixture and preparation method thereof

一种异氰酸酯、混合物的技术，应用在浅色改性异氰酸酯混合物及其制备领域，达到色号降低明显、粘度变化小、稳定性好的效果

Active Publication Date: 2018-04-06
WANHUA CHEM GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0011] Existing methods for preparing liquid isocyanates containing CDI and / or UTI groups are difficult to overcome the above defects

Method used

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  • Light color modified isocyanate mixture and preparation method thereof
  • Light color modified isocyanate mixture and preparation method thereof
  • Light color modified isocyanate mixture and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] 500g diphenylmethane diisocyanate in N 2 Heat to about 50°C while stirring under protection, add 0.5ppm of 1-phenyl-3-methyl-3-phospholene high-efficiency catalyst, mix and quickly heat to 200°C, react for 90 minutes and reverse diphenyl After 200g of methane diisocyanate, add 200ppm of terminator diphenyldifluorosilane and 50ppm of terminator p-toluenesulfonic anhydride, rapidly cool the temperature down to 60°C, stir the mixture for 30 minutes, and then reverse 200g of diphenylmethane diisocyanate for the second time , followed by stirring at 70-80° C. for 120 minutes to obtain the final product.

Embodiment 2

[0047] 500g diphenylmethane diisocyanate in N 2 Heat to about 50°C while stirring under protection, add 0.5ppm of 1-phenyl-3-methyl-3-phospholene high-efficiency catalyst, mix and quickly heat to 200°C, react for 90 minutes and reverse diphenyl After 200g of methane diisocyanate, add 200ppm terminator diphenyl dichlorosilane and 50ppm terminator trifluoromethanesulfonic anhydride, quench the temperature down to 60°C, then stir the mixture for 30min, and then reverse 200g diphenylmethane for the second time diisocyanate, and then stirred at 70-80° C. for 120 minutes to obtain the final product.

Embodiment 3

[0049] 500g diphenylmethane diisocyanate in N 2 Heat to about 50°C while stirring under protection, add 1ppm of 1-methyl-3-methyl-3-phospholene-1-oxide high-efficiency catalyst, mix and quickly heat to 120°C, react after 200min After adding 200g of diphenylmethane diisocyanate, add 200ppm of terminator trityl fluorosilane and 50ppm of terminator p-toluenesulfonic anhydride, rapidly cool the temperature down to 60°C, stir the mixture for 30 minutes, and then reverse 200g of diphenyl methyl methane diisocyanate, and then stirred at 70-80°C for 120 minutes to obtain the final product.

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PUM

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Abstract

The invention relates to a light color modified isocyanate mixture and a preparation method thereof. The method comprises the following steps: (a) carrying out reaction on isocyanate groups of the rawmaterial isocyanate in the presence of phosphorus-heterocycle catalysts, and finally obtaining a modified isocyanate reaction solution containing carbodiimide and / or uretonimine derivatives; and (b)adding a terminating agent compounded from halogenated silane organic matters and sulfonic anhydrides into the reaction solution obtained in the step a so as to terminate the carbodiimide reaction. The modified isocyanate prepared by the method has the characteristics of normal-temperature liquid and normal temperature and high temperature storage stability and low color number.

Description

technical field [0001] The invention relates to a light-colored modified isocyanate mixture and a preparation method thereof. The modified isocyanate mixture contains carbodiimide (CDI) and / or uretonimine (UTI) derivatives, is liquid at normal temperature and has low color No., with good room temperature storage and high temperature stability. Background technique [0002] Isocyanate can be polycondensed under certain conditions to release CO 2 Afterwards, carbodiimide derivatives are generated, and the carbodiimide group can undergo addition reaction with isocyanate to form a uretonimine group. By this method, the isocyanate contains CDI and UTI substances, which can reduce the melting point of isocyanate. It is liquid at room temperature, and forms a stable low-viscosity liquid for easy transportation, and has good storage stability, and the products prepared from this modified isocyanate have better performances such as light resistance, flame resistance, hydrolysis resi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C263/18C07C265/14C07C267/00C07D229/00
CPCC07C263/18C07C267/00C07D229/00C07C265/14C08G18/10
Inventor 周也王文博夏以禄张宏科刘小高牛桂英王会会刘雪婷
Owner WANHUA CHEM GRP CO LTD
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