Protective coating compositions comprising a ternary mixture of an oilmodified alkyd resin and an etherified formaldehyde resin

Claim 1

A PROTECTIVE COATING COMPOSITION COMPRISING AN ORGANIC SOLVENT SOLUTION OF A TERNARY MIXTURE OF (1) AN OIL-MODIFIED ALKYD RESIN, (2) AN ETHERIFIED FORMALDEHYDE CONDENSATE OF MELAMINE AND (3) A COMPOUND OF THE GROUP CONSISTING OF (A) AN N-SUBSTITUTED MELAMINE AND (B) AN UNETHERIFIED FORMALDEHYDE CONDENSATE OF AN NSUBSTITUTED MELAMINE; SAID OIL-MODIFIED ALKYD RESIN CONSTITUTING 50-90 WEIGHT PERCENT OF THE TOTAL OF (1), (2) AND (3); SAID COMPOUND (3) CONSTITUTING 5-80 WEIGHT PERCENT OF THE TOTAL OF (2) AND (3); SAID ETHERIFIED FORMALDEHYDE CONDENSATE OF MELAMINE BEING AN ETHERIFIED REACTION PRODUCT OF AT LEAST 4 MOLS OF A MONOHYDRIC ALCOHOL CONTAINING 1-6 CARBON ATOMS AND A CONDENSATION PRODUCT OF 1 MOLE OF MELAMINE AND AT LEAST 3 MOLS OF FORMALDEHYDE; SAID N-SUBSTITUTED MELAMINE BEING SELECTED FROM THE GROUP CONSISTING OF N,N''-DIALKYLMELAMINES, N,N'',N"TRIALKYLMELAMINES AND MIXTURE THEREOF, THE INDIVIDUAL ALKYL GROUPS OF SAID N-SUBSTITUTED MELAMINES BEING ACYCLIC AND CONTAINING A MAXIMUM OF ABOUT 20 CARBON ATOMS AND THE TOTAL NUMBER OF CARBON ATOMS CONTAINED IN ALL OF SAID ALKYL GROUPS NOT EXCEEDING ABOUT 36.