Adhesion promotion of coated film

Claim 1

IN THE PROCESS OF TREATING A SOLID SURFACE HAVING THEREON A POLYMERIC COATING CONTAINING AN ANIONIC SURFACTANT WHEREIN A DILUTE AQUEOUS SOLUTION OF A REACTION PRODUCT OBTAINED BY REACTING 1 TO 4 MOLS OF ACETYLACETONE WITH 1 MOL OF AN ALKYL TITANATE HAVING FROM 2 TO 4 CARBON ATOMS IN THE ALKYL GROUP IS APPLIED TO SAID COATED SURFACE AND THE LIQUID IS THEREAFTER EVAPORATED FROM THE APPLIED SOLUTION, WHEREBY TO ENHANCE THE TENDENCY OF SAID COATED SURFACE TO BOND WITH OTHER SURFACES; THE IMPROVEMENT WHICH COMPRISES ADDING TO THE DILUTE AQUEOUS SOLUTION FROM 1% TO 10% BY WEIGHT, BASED ON THE WEIGHT OF SAID REACTION PRODUCT IN THE SOLUTION, A WATER-SOLUBLE ACIDIC COMPOUND SELECTED FROM THE GROUP CONSISTING OF (1) ALIPHATIC POLYCARBOXYLIC ACIDS, (2) HYDROXY AND AMINO SUBSTITUTED MONOCARBOXYLIC ACIDS, SAID SUBSTITUTION OCCURRING IN A POSITION B, Y, OR $ FROM THE CARBOXCYL GROUP, (3) SECONDARY AND TERTIARY AMINE SUBSTITUTED POLYCARBOXYLIC ACIDS, AND (4) HYDROXY SUBSTITUTED ALIPHATIC POLYCARBOXYLIC ACIDS, ADN MAINTAINING SAID DILUTE AQUEOUS SOLUTION WITHIN A PH RANGE OF FROM 3.5 TO 5.3.