Diisocyanates and their use for the preparation of...

Details Diisocyanates and their use for the preparation of... Diisocyanates and their use for the preparation of...

C - Chemistry, Metallurgy

08

G

402/159, 260/456

C08G 18/75 (2006.01) C07C 211/36 (2006.01)

Patent

CA 1239416

NEW DIISOCYANATES AND THEIR USE FOR THE PREPARATION OF POLYURETHANES ABSTRACT OF THE DISCLOSURE The present invention relates to diisocyanates having an isocyanate content of from about 20 to 50% by weight, optionally in the form of isomeric mixtures, characterized in that, in addition to containing a sterically unhindered isocyanate group attached to a primary aliphatic carbon atom, they contain a sterically hindered isocyanate group attached to a tertiary carbon atom which forms part of a cycloaliphatic ring system. The invention also relates to the use of the new diisocyanates, optionally blocked with blocking agents for isocyanate groups, as isocyanate component for the preparation of polyurethanes.

472792

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