POLYISOCYANATES HAVING BIURET GROUPS

Polyisocyanates that contain biuret groups are prepared. They are obtained by reacting organic polyamines having two primary amino groups not attached to aliphatic and/or cycloaliphatic moieties with organic polyisocyanates that are free of biuret groups in a molar NH2/NCO ratio of from 1:5 to 1:100...

Full description

Saved in:
Bibliographic Details
Main Authors H. HETZEL, K. KONIG, H.G. SCHMELZER, K. WAGNER
Format Patent
LanguageEnglish
Published 10.01.1980
Subjects
ACYCLIC OR CARBOCYCLIC COMPOUNDS
CHEMISTRY
COMPOSITIONS BASED THEREON
MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONSONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
METALLURGY
ORGANIC CHEMISTRY
ORGANIC MACROMOLECULAR COMPOUNDS
THEIR PREPARATION OR CHEMICAL WORKING-UP
Online AccessGet full text

Cover

More Information
Summary:Polyisocyanates that contain biuret groups are prepared. They are obtained by reacting organic polyamines having two primary amino groups not attached to aliphatic and/or cycloaliphatic moieties with organic polyisocyanates that are free of biuret groups in a molar NH2/NCO ratio of from 1:5 to 1:100. The polyamines are reacted in the form of vapour directly with the polyisocyanates which have been heated to a temperature of from 100 DEG C to 250 DEG C. The resulting polyisocyanates with biuret groups can be used for preparing high-grade, weather-resistant, light-stable coatings.
Bibliography:Application Number: AU19770023077