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US 4,727,128 AGranted
Diisocyanates containing urethane groups, a process for their preparation and their use as binders or binder component in polyurethane lacquers
AssigneeBayer Aktiengesellschaft
InventorsJosef Pedain, Bernd Riberi, Michael Sonntag, Klaus Konig, Jurg Frohlich
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Abstract
The present invention is directed to a process for the preparation of a diisocyanate by reacting a diisocyanate with 2,2,4-trimethyl-pentanediol-(1,3) or reaction products of this diol which contain either ether or ester groups and optionally other diols or triols. The present invention is additionally directed to the diisocyanates produced by this process and to their use in one-component and two-component coating compositions.
Claims7
A diisocyanate corresponding to the formula
- R.sup.1 --O--R.sup.2 --O--.sub.n CO--NH--R.sup.3 --NCO].sub.2
- optionally in admixture with up to about 90% by weight, based on the total weight, of polyisocyanates containing urethane groups corresponding to the formula
- R.sup.4 --O--CO--NH--R.sup.3 --NCO).sub.m
- and optionally minor quantities of oligomeric polyisocyanates containing urethane groups, wherein
- R.sup.1 represents a group of the formula ##STR3## R.sup.2 represents a group of the formula --CH.sub.2 --CH.sub.2 --, ##STR4## or --CO--(CH.sub.2).sub.5 --, R.sup.3 represents a difunctional hydrocarbon group optionally containing ester groups and linking the isocyanate groups of an organic diisocyanate having a molecular weight of from 132 to 336,
- R.sup.4 represents an m-valent aliphatic hydrocarbon group with 2 to 10 carbon atoms optionally containing ether groups and different from R.sup.1,
- m represents 2 or 3 and
- n represents 0, 1 or 2.
5 more elements
Dependencies are inferred from the claim text.