PRODUCTION OF METHYLENE CROSS-LINKED POLYPHENYLENE POLYISOCYANATE CONTAINING DIPHENYLMETANE TRIISOCYANATE AS MAIN COMPONENT

Title:

PRODUCTION OF METHYLENE CROSS-LINKED POLYPHENYLENE POLYISOCYANATE CONTAINING DIPHENYLMETANE TRIISOCYANATE AS MAIN COMPONENT

Document Type and Number:

Japanese Patent JPH10158231

Kind Code:

A

Abstract:

To provide a method for producing a methylene cross-linked polyphenylene polyisocyanate containing industrially useful diphenylmethane triisocyanates as a main component.

This method for producing a methylene cross-linked polyphenylene polyisocyanate comprises (1) using an aliphatic and/or alicyclic hydrocarbon having at least five carbon atoms, (2) extracting the objective compound at ≥40°C but <80°C from a methylene cross-linked polyphenylene polyisocyanate mixture containing diphenylmethane triisocyanates, and (3) succeedingly evaporating the extract in a thin film evaporator.

Inventors:

HONMA SHIRO
ONO AKIHIRO
SATO NAOKI

Application Number:

JP31919196A

Publication Date:

June 16, 1998

Filing Date:

November 29, 1996

Export Citation:

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Assignee:

MITSUI CHEMICALS INC

International Classes:

C07C263/20; C07C265/14; (IPC1-7): C07C265/14; C07C263/20

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