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US 4,383,076 AGranted
Single component enamels based on blocked polyisocyanurate polyisocyanates
OwnerElmar Wolf, Rainer Grasinventors
Life of this patent
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Abstract
A single component enamel composition comprising a polyester component containing more than one hydroxy group in the molecule and a hardener component, said hardener comprising at least one diisocyanate capped with .epsilon.-caprolactam and/or at least one polyisocyanate containing isocyanaturate groups capped with .epsilon.-caprolactam.
Claims8
A single component enamel composition, comprising:
- from 40% to 80% by wt of a resin in at least one solvent, said resin comprising a polyester component containing more than one hydroxy group in the molecule and having a second order transition temperature ranging between +25.degree. C. and -25.degree. C. and a hardener component of the formula:
- ##STR4## wherein x ranges from 0 to 4 with the proviso that at a minimum, the hardener must comprise a material having a value for x of one, and wherein R is --(CH.sub.2).sub.n -- with 3.ltoreq.n.ltoreq.12, or is ##STR5## said hardener prepared by adding a mixture of propylene oxide and 1,4-diazabicyclooctane (2,2,2) as a catalyst to a cycloaliphatic diisocyanate, trimerizing said diisocyanate to the desired degree, deactivating the catalyst and then capping said trimerized isocyanurate with .epsilon.-caprolactam.
Dependencies are inferred from the claim text.