Asahi Kasei Kogyo Kabushiki Kaisha

Akira Ide

Yasushi Kishimoto

Sojiro Matsumoto

Shinsaku Ogawa

Tsunesuke Doi

Kaoru Ueyanagi

Kazurou Komatsu

Masaaki Kato

Kazuro Komatsu

A process for preparing a modified aliphatic, alicyclic or araliphatic organic polyisocyanate composition which comprises heating an aliphatic, alicyclic or araliphatic organic polyisocyanate composition having at least two isocyanate groups in one molecule at a temperature of from about 100.degree. C. to about 200.degree. C. in the presence of an aliphatic, alicyclic or araliphatic organic diisocyanate monomer in an amount of at least about 1/2 of the weight of the organic polyisocyanate composition and removing unreacted aliphatic, alicyclic or araliphatic organic diisocyanate monomer.

Process for preparing organic polyisocyanate compositions

4-Isocyanate methyl-1,8-octamethylene diisocyanate of the formula (I), ##STR1## and a method of preparing 4-isocyanate methyl-1,8-octamethylene diisocyanate of the formula (I) which comprises reacting 4-aminomethyl-1,8-diaminooctane of the formula (II), ##STR2## or its salt with phosgene at a temperature of about 70.degree. C. to about 220.degree. C. in an inert reaction medium.

Aliphatic triisocyanate, a method for preparing it and the preparation

A process for producing an organic polyisocyanate having a long storage life which comprises reacting an aliphatic, alicyclic or araliphatic diisocyanate monomer with water in the presence of a solvent comprising a mixture of at least one ethylene glycol derivative represented by the formula (I):

Reaction of organic diisocyanates with water

An isocyanate prepolymer represented by the formula ##STR1## wherein n is an integer of 1 to 6, R', R' and R'', which may be the same or different, each represents a divalent aliphatic, araliphatic, aromatic or acyclic group which may contain a ##STR2## bond, and R' and R'' may contain a ##STR3## bond, and a process for producing the same.

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Nobeoka, Japan

Akira Ide