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C07C273/00—Preparation of urea or its derivatives, i.e. compounds containing any of the groups, the nitrogen atoms not being part of nitro or nitroso groups
C07C273/18—Preparation of urea or its derivatives, i.e. compounds containing any of the groups, the nitrogen atoms not being part of nitro or nitroso groups of substituted ureas
C07C273/189—Purification, separation, stabilisation, use of additives
Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
Y02P20/00—Technologies relating to chemical industry
Y02P20/50—Improvements relating to the production of bulk chemicals
Y02P20/54—Improvements relating to the production of bulk chemicals using solvents, e.g. supercritical solvents or ionic liquids
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Organic Low-Molecular-Weight Compounds And Preparation Thereof
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AT87420256T1986-09-301987-09-24Verfahren zur isolierung und reinigung von biuretgruppen aufweisenden polyisocyanaten.
ATE65079T1
(de)
Manufacture of polyisocyanate having isocyanurate groups, solution suitable as catalyst component therefor and use for polyurethane manufacture as isocyanate component
Werkwijze voor bereiden van geblokkeerde isocyanaatgroepen- en isocyanuraatgroepen-bevattende verbindingen uit alifatische en/of cycloalifatische polyisocyanaten.
Process for the preparation of organic polyisocyanates containing biuret and/or urea groups, as well as dispersions of polyisocyanates containing urea groups in a diisocyanate free of urea
Verwendung von harnstoff- und/oder biuretgruppen aufweisenden polyisocyanat-zubereitungen, als isocyanatkomponente bei der herstellung von kunststoffen nach dem isocyanat-polyadditionsverfahren.
Verwendung von harnstoff- und/oder biuretgruppen aufweisendenpolyisocyanat-zubereitungen als isocyanat komponente bei der herstellung von kunststoffen nach dem verfahren der reaktionsspritzgusstechnik.
Verfahren zur Herstellung von Isocyanurat- und/oder Uretdiongruppen enthaltenden Polyisocyanaten mit reduzierter Farbzahl und verbesserter Lagerstabilität sowie nach diesem Verfahren hergestellte Produkte