Modified polyisocyanates with biuret structure and process for their preparation
申请人:TECNOPART S.r.l.
公开号:EP0177059A2
公开(公告)日:1986-04-09
Modified polyisocyanates with biuret structure containing terminal urethane groups and having general formula:
where R, is an aliphatic, cycloaliphatic or aliphatic-cycloaliphatic radical, simple or substituted, and R2 can have the same meanings as R, or be the radical R3(OCnH2n)x-.
Process for the preparation of modified polyisocyanates having biuret structure containing terminal urethane groups having general formula (l) consisting in reacting an organic diisocyanate with water or with a compound splitting off water, in the presence of a compatibilizing agent having a hydrogen atom reactive towards the isocyanate group, as it can be determined by Zerewitinoff's method.
Verfahren zur Herstellung N,N-disubstituierter Mono- und Oligourethane
申请人:BAYER AG
公开号:EP0238925A2
公开(公告)日:1987-09-30
Gegenstand der Erfindung ist ein Verfahren zur Herstellung N,N-disubstituierter Mono- und Oligourethane durch Umsetzung N-aliphatisch, -cycloaliphatisch sowie -araliphatisch substituierter Mono- und Oligourethane mit Alkylierungsmitteln in Gegenwart mindestens äquivalenter Mengen an festem Metallhydroxid in Substanz oder in einem geeigneten Lösungsmittel, gegebenenfalls in Gegenwart eines Phasentransferkatalysators.
High functionality compositions based on fluorinated and silanized polyisocyanates and varnishes prepared therefrom
申请人:AUSIMONT S.p.A.
公开号:EP0251334A1
公开(公告)日:1988-01-07
High-functionality compositions based on fluorinated and silanized polyisocyanates, prepared by reacting a hydroxy-terminated perfluoropolyether having an average molecular weight ranging from 500 to 7000 and a silico-carbinol having an average molecular weight ranging from 500 to 7000, with an organic diisocyanate and a polyol having a functionality of at least 3. Varnishes containing said compositions based on fluorinated and silanized polyisocyanates, having a high functionality.
N,N-disubstituierte Oligo-und Polyurethane, Verfahren zu ihrer Herstellung sowie ihre Verwendung bei der Herstellung von Kunststoffen
申请人:BAYER AG
公开号:EP0351640A1
公开(公告)日:1990-01-24
Die vorliegende Erfindung betrifft neue N,N-disubstituierte Oligo- und Polyurethane mit Hydroxylendgruppen, ein Verfahren zu ihrer Herstellung sowie ihre Verwendung bei der Herstellung von Kunststoffen.
本发明涉及带有羟基端基的新型 N,N-二取代低聚和聚氨酯、其制备工艺以及在塑料生产中的应用。
The use of fluorinated polyurethanes with hydroxy functionality for the treatment of lithoidal material
申请人:SYREMONT S.p.A.
公开号:EP0405534A1
公开(公告)日:1991-01-02
Described are fluorinated polyurethanes with hydroxy functionality, obtainable by reacting at least one diisocyanate with at least one hydroxy-capped (per)fluoropolyether, preferably having a molecular weight of from about 400 to about 7000 and with at least one polyol having a functionality of at least 2.
These products are useful for the treatment of lithoidal materials.