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US 4,393,002 AGranted
.epsilon.-Caprolactam blocked diisocyanates
AssigneeCiba-Geigy Corporation
InventorsJonas Weiss, Raymond Seltzer
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Abstract
Powder coatings for the preparation of protective films for a wide variety of substrates, said coatings being based on urethane or epoxy systems containing a .epsilon.-caprolactam-blocked mixed 5(6)-isocyanato-1-(4'-isocyanatophenyl)-1,3,3-trimethylindane; as well as the mixed diisocyanate and the .epsilon.-caprolactam-blocked form thereof.
Claims3
A .epsilon.-caprolactam-blocked diisocyanate isomeric mixture corresponding to the formula ##STR3## said mixture comprising from about 10 to 80% of the 5-isomer and from about 90 to 10% of the 6-isomer.
Dependencies are inferred from the claim text.