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Method for preparing a liquid, storied stably, low-color indexed, carbodiimide and/or uretone imine group-containing organic isocyanic ester

A technology of uretonimide group and carbodiimide group is applied in the field of preparation of organic isocyanates that are liquid, stable in storage, low in color index, and contain carbodiimide and/or uretonimide groups, Can solve the problem of poor color index of isocyanate

Inactive Publication Date: 2010-09-29
BAYER MATERIALSCIENCE AG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In practice, however, it was subsequently found that the color index of the resulting CD / UI modified isocyanate was rather poor

Method used

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  • Method for preparing a liquid, storied stably, low-color indexed, carbodiimide and/or uretone imine group-containing organic isocyanic ester

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0047] The present invention is further illustrated by the following examples, but is not limited to the following examples.

[0048] raw material:

[0049] Isocyanate 4,4-methylene diphenyl diisocyanate, NCO content: 33.6% by weight (DESMODUR44M, Bayer AG)

[0050] Industry of 1-methyl-1-oxo-1-phosphole-2-ene and 1-methyl-1-oxo-1-phosphon-3-ene as catalysts for cyclopentene phosphine oxide Grade mixture, the concentration in toluene is 10%.

[0051] Polyether of polyol propylene and ethylene oxide units, 80%-90% primary OH groups, functionality 3, OH value 28 mg KOH / g and viscosity 1200 mPas at 25°C (MULTRANOL3901Bayer Corp .)

[0052] Production steps of organic isocyanate with carbodiimide and / or uretonimine groups:

[0053] 10kg Hasen Color Index 2 / Heat to 60°C with stirring, and add 250 mg of catalyst solution (2.5 ppm; 0.2 mmol). Place the reaction mixture in N 2 / Heat for 240 minutes with stirring to about 95°C. Add relevant terminator to terminate the carbodiimide reacti...

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Abstract

The invention relates to a method for preparing liquid isocyanate mixture of stable storage, low color indexand containing carbodiimide (CD) and / or urea ketoimine (UI) group, isocyanate mixtureprepared by this method and the application of which in preparing the mixing compound with other isocyanate or preparing prepolymer containing isocyanate and polyurethane plastic-preference polyurethane foam plastic.

Description

Technical field [0001] The invention relates to a method for preparing an isocyanate mixture containing carbodiimide (CD) and / or uretone imine (UI) groups in a liquid state, storage stability, low color index, and can be prepared by this method Isocyanate mixtures, and their use in the production of blends with other isocyanates or in the production of isocyanate group-containing prepolymers and polyurethane plastics, preferably polyurethane foams. Background technique [0002] Isocyanate mixtures containing CD and / or UI groups can simply be used with high-efficiency catalysts of the cyclopentene phosphine (phospholine) series, especially the high-efficiency catalysts of the cyclopentene phosphine oxide series, according to US-A-2853473, US-A -6120699 and EP-A-515933. [0003] On the one hand, the high catalytic activity of the cyclopentene phosphine catalyst, especially the cyclopentene phosphine oxide catalyst, is expected in order to activate the carbodiimidation reaction under...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07C263/18C07C265/14C07C267/00C07C331/30C08G18/08C08G18/70
Inventor S·维索芬M·施米特H·-G·皮克尔T·哈根
Owner BAYER MATERIALSCIENCE AG