Uretdione-functional polyisocyanates, a process for their preparation, and their use
AssigneeHuels Aktiengesellschaft
InventorRainer Gras
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Abstract
Urea- and uretdione-functional polyisocyanates having the following formula (I): ##STR1## where ##STR2## n is an integer of from 1 to 20; R.sup.1, R.sup.3 =not more than one linear or branched (cyclo)alkyl radical having 1-14 carbon atoms or H and at least one of the formula: ##STR3## R.sup.2 =R, linear or branched (cyclo)alkyl radical having 6 carbon atoms; R.sup.4, R.sup.5 =identical or different hydrocarbon radicals having 1 to 14 carbon atoms.
Claims9
A urea- and uretdione-functional polyisocyanate comprising the following formula (I):
- ##STR17## where ##STR18## n is an integer of from 1 to 20;
- R.sup.1, R.sup.3 are not more than one linear or branched (cyclo)alkyl radical having 1-14 carbon atoms or H and at least one of the following radicals:
- ##STR19## R.sup.2 is R, linear or branched (cyclo)alkyl radical having 6 carbon atoms;
- R.sup.4, R.sup.5 are identical or different hydrocarbon radicals having 1 to 14 carbon atoms.
A process for preparing a urea- and uretdione-functional polyisocyanate having free, or partially or totally blocked isocyanate groups, comprising a reaction with the steps in accordance with the following equation:
- ##STR20##
Dependencies are inferred from the claim text.