METHOD FOR PRODUCING ISOCYANATE COMPOUND CONTAINING ETHYLENICALLY UNSATURATED GROUP

WIPO Patent Application WO/2012/176631

A1

The present invention relates to a method for producing an isocyanate compound containing an ethylenically unsaturated group, characterized by comprising: (i) a step of subjecting a tri-substituted urea compound represented by general formula (1) (wherein symbols are as defined in the description) to a thermal decomposition reaction in a solution containing hydrogen chloride at a temperature of 50-200˚C (a thermal decomposition step); (ii), subsequent to the completion of the thermal decomposition step, a step of blowing a hydrogen chloride gas into a reaction solution that is held at the above-mentioned temperature (an aging step A); and (iii), subsequent to the completion of the aging step A, a step of further holding the reaction solution at the above-mentioned temperature (an aging step B). According to the present invention, an isocyanate compound containing an ethylenically unsaturated group can be produced with high yield and steadily while reducing the production of by-products to a great extent, without requiring the use of phosgene as a raw material and without requiring any hydrochloric acid removal step.

KATO TOMOMITSU (JP)
OHNO KATSUTOSHI (JP)

PCT/JP2012/064785

December 27, 2012

June 08, 2012

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SHOWA DENKO KK (JP)
KATO TOMOMITSU (JP)
OHNO KATSUTOSHI (JP)

C07C263/06; C07C263/18; C07C265/04

JPS5533480A	1980-03-08
JPH0348651A	1991-03-01
JPS61277659A	1986-12-08
JP2003040927A	2003-02-13
JP2004035841A	2004-02-05
JPH06157449A	1994-06-03
US4873364A	1989-10-10

OHIE Kunihisa et al. (JP)
Landlord Kunihisa (JP)

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