PREVENTION OF DISCOLORATION OF ORGANIC ISOCYANATE COMPOUND

Title:

PREVENTION OF DISCOLORATION OF ORGANIC ISOCYANATE COMPOUND

Document Type and Number:

Japanese Patent JPH0920744

Kind Code:

A

Abstract:

To obtain a high-quality organic isocyanate compound by adding a specific three component-based discoloration inhibitor to the compound, useful as a raw material for an elastic material, a foam, an adhesive, etc., while effectively preventing discoloration.

The method for preventing discoloration of an organic isocyanate compound comprises blending (A) an organic isocyanate compound with (B) a compound of the formula [R1 and R2 are each a 1-10C (branched) saturated hydrocarbon group; R3 is R1 or (thio) ether group] [e.g. 4,4'- butylidenebis(3-methyl-6-tert-butyphenol)] (B1), 2,6-di-tert-butyl-4-methylphenol (B2) and triphenyl phosphite (B3), for example, in the ratio of 100 pts.wt. of the component A, 0.005-1 pt.wt., especially 0.01-0.05 pt.wt. of the component B1, the component B2 and the component B3, respectively.

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Inventors:

MATSUZAKA YASUHIRO
MURATA NAOHIRO
ISHIKAWA KEIKO
TANIGUCHI TOSHIYUKI
TAKAYANAGI HIROSHI

Application Number:

JP16876295A

Publication Date:

January 21, 1997

Filing Date:

July 04, 1995

Export Citation:

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Assignee:

MITSUI TOATSU CHEMICALS

International Classes:

C07C263/18; C07C265/14; C09K15/08; C09K15/32; (IPC1-7): C07C265/14; C07C263/18

Next Patent: SYNTHETIC PROCESS FOR UREA INCLUDING TWO SEPARATED REACTION ZONES