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US 4,868,268 AGranted
Process for preparing polyurethanes from an organic diisocyanate ester
AssigneeBayer Aktiengesellschaft
InventorsHanns P. Muller, Roland Gipp
Life of this patent
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Abstract
Novel polyurethanes are prepared by reacting (a) an organic diisocyanate of formula ##STR1## wherein M represents --CH.dbd.CH--; --N.dbd.N--; --CH.dbd.N--; ##STR2## or and where R.sub.1 through R.sub.4 may be the same or different and represent hydrogen, halogen, CN, CF.sub.3 or saturated aliphatic C.sub.1 -C.sub.12 alkyl residues which may be interrupted by ether hydrogen atoms with (b) compounds of molecular weights of from between 400 and 10,000 and which contain at least two active hydrogen atoms reactive toward isocyanate groups.
Claims8
A process for preparing polyurethanes by reacting
- (a) an organic diisocyanate of the formula ##STR9## wherein M represents ##STR10## and where R.sub.1 through R.sub.4 are the same or different and represent hydrogen, halogen, CN, CF.sub.3, saturated aliphatic C.sub.1 -C.sub.12 alkyl residues, or C.sub.1 -C.sub.12 alkyl residues interrupted by ether oxygen atoms, with
- (b) compounds having molecular weights of from between 400 and 10,000 and containing at least two active hydrogen atoms reactive toward isocyanate groups.
Dependencies are inferred from the claim text.