PRODUCTION METHOD FOR ISOCYANURATE-GROUP-CONTAINING POLYISOCYANATE

PROBLEM TO BE SOLVED: To provide a method for producing an isocyanurate-group-containing polyisocyanate which has a high NCO content, a low degree of coloration, a low viscosity, and very high qualities, does not substantially contain a high- mol.-wt. component, and can be widely used as a raw mater...

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Bibliographic Details
Main Authors KATAOKA YOSHIZUMI, ITO SHOGO, SASAHARA TOSHIAKI, IKEMOTO MITSUNARI
Format Patent
LanguageEnglish
Published 28.08.2002
Edition7
Subjects
CHEMISTRY
COMPOSITIONS BASED THEREON
MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONSONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
METALLURGY
ORGANIC MACROMOLECULAR COMPOUNDS
THEIR PREPARATION OR CHEMICAL WORKING-UP
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Summary:PROBLEM TO BE SOLVED: To provide a method for producing an isocyanurate-group-containing polyisocyanate which has a high NCO content, a low degree of coloration, a low viscosity, and very high qualities, does not substantially contain a high- mol.-wt. component, and can be widely used as a raw material for a curing agent used in polyurethane foam production and as a raw material for coating compositions, adhesives, elastomers, plastic foams, etc. SOLUTION: This method, for producing an isocyanurate-group-containing polyisocyanate from hexamethylene diisocyanate, is characterized in that 100 pts.wt. hexamethylene diisocyanate is subjected to a first step reaction at 55 deg.C or lower in the presence of 0.05-5 pts.wt. glycol having a secondary hydroxy group, 0.005-0.5 pt.wt. compound having a phenolic hydroxy group, and a catalytic amount of a fatty acid-alkali metal salt and then to a second step reaction at a temperature higher than in the first step reaction and the reaction is stopped.
Bibliography:Application Number: JP20010040662