Air-dry surface coating resin

Claim 1

AN AQUEOUS FILM FORMING COMPOSITION CONSISTING ESSENTIALLY OF A RESINOUS MATERIAL SUITABLE FOR THE FORMATION OF AN AIR-DRY SURFACE COATING FILM WHICH RESINOUS MATERIAL CONSISTS ESSENTIALLY OF (A) THE POLYCONDENSATION REACTION PRODUCT OF (1) AN ACIDIC MEMBER SELECTED FROM THE CLASS CONSISTING OF TRIMELLITIC ACID, TRIMELLITIC ANHYDRIDE, HEMIMELLITIC ACID OF HEMIMELLITIC ANHYDRIDE AND A POLYALKYLENE GLYCOL MONOALKYL ETHER CONTAINING FROM 2 TO 8 ETHER GROUPS, EACH ALKYLENE UNIT CONTAINING FROM 2 TO 3 CARBON ATOMS AND THE ALKYL GROUP CONTAINING FROM 1 TO 8 CARBON ATOMS, SAID ACIDIC MEMBER AND SAID ETHER BEING PRESENT IN THE RESPECTIVE MOLE RATIO OF 1:0.3-0.7 WITH (II) A MATEERIAL AFFORDING ON THE AVERAGE OF ABOUT TWO HYDROXY GROUPS PER MOLECULE WHICH MATERIAL IS SELECTED FROM THE GROUP CONSISTING OF (A) THE HYDROXYL GROUP CONTAINING ESTER OF A POLYETHENOID FATTY ACID CONTAINING AT LEAST ABOUT 10 CARBON ATOMS AND A POLYHYDRIC PARAFFINIC ALCOHOL CONTAINING 3-4 HYDROXYL GROUPS, (B) THE ALCOHOLYSIS PRODUCT OF A DRYING FATTY OIL AND A POLYHYDRIC PARAFFINIC ALCOHOL CONTAINING 3-4 HYDROXYL GROUPS AND (C) MIXTURES THEREOF, SAID MATERIAL BEING CHARGED IN A MOLE RATIO TO ACIDIC MEMBER CHARGED OF 1.6-2.3:1, WHICH RESIN IS CHARACTERIZED BY AN ACID NUMBER OF ABOUT 15-60 AND OBTAINING SAID RESINOUS MATERIAL BY HEATING SAID RESIN AND A MINOR AMOUNT OF A COBALT SALT OF A FATTY ACID AT A TEMPERATURE OF 130*-220* C. FOR A TIME SUCH THAT THE AIR-DRY PROPERTIES OF SAID RESIN ARE IMPROVED, SAID RESINOUS MATERIAL BEING REACTEDC WITH (B) AN AQUEOUS SOLUTION OF AN ALKALINE AGENT SELECTED FROM THE GROUP CONSISTING OF AMMONIA, ALKYLAMINES, HETEROAMINES AND ALKANOLAMINES TO OBTAIN AN AQUEOUS SOLUTION OF SAID RESINOUS MATERIAL, WHICH SOLUTION IS CHARACTERIZED BY A PH OF 5 TO 8 AND IS CAPABLE OF LAYING DOWN SURFACE COATING FILMS HAVING AIR-DRY PROPERTIES WHEN EXPOSED TO THE ATMOSPHERE AT ORDINARY TEMPERATURES.