JPH05286978

PURPOSE:To efficiently obtain the subject oligomers useful as an intermediate, etc., for resins, etc., by polymerizing a specific diisocyanic acid ester, etc., in the presence of a phase-transfer catalyst. CONSTITUTION:A diisocyanic acid or a diisothiocyanic acid ester expressed by formula I [A is f...

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Bibliographische Detailangaben
Hauptverfasser:	KAMIOKA AKIRA, YABUTANI KUNIHIRO
Format:	Patent
Sprache:	eng
Schlagworte:	APPARATUS THEREFOR CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOIDCHEMISTRY CHEMISTRY COMPOSITIONS BASED THEREON GENERAL METHODS OF ORGANIC CHEMISTRY HETEROCYCLIC COMPOUNDS MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONSONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS METALLURGY ORGANIC CHEMISTRY ORGANIC MACROMOLECULAR COMPOUNDS PERFORMING OPERATIONS PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL THEIR PREPARATION OR CHEMICAL WORKING-UP THEIR RELEVANT APPARATUS TRANSPORTING
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Beschreibung
Zusammenfassung:	PURPOSE:To efficiently obtain the subject oligomers useful as an intermediate, etc., for resins, etc., by polymerizing a specific diisocyanic acid ester, etc., in the presence of a phase-transfer catalyst. CONSTITUTION:A diisocyanic acid or a diisothiocyanic acid ester expressed by formula I [A is formula II [R is halogen, nitro, hydroxyl, lower alkyl, etc.; (q) is 0-2], etc.; X is O or S; (m) is 0-2] is polymerized in the presence of a phase-transfer catalyst such as quaternary ammonium salts to afford the objective oligomers expressed by formula III [(n) is >=2].