Coating compositions comprising carboxyl containing copolymer, epoxide and amino resin

Claim 1

A METHOD OF MAKING AN ORGANIC COATING ON SURFACES WHICH COMPRISES SIMULTANEOUSLY MIXING AS THE SOLE ESSENTIAL REACTING CONSTITUENTS AT AN ELEVEATED TEMPERATURE BETWEEN 30 AND 90*C. IN THE PRESENCE OF A NON-AQUEOUS ORGANIC SOLVENT (1) A VINYL COPOLYMER HAVING AN ACID NUMBER BETWEEN 30 AND 150 WHICH IS A COPOLYMER OF MONOMERS CONSISTING ESSENTIALLY OF (A) A MEMBER OF THE GROUP CONSISTING OF ACRYLIC ACID, ACRYLIC ACIDS SUBSTITUTED IN THE ALPHA POSITION WITH LOWER ALKYL, MALEIC ACID AND MALEIC ANHYDRIDE, AND (B) AN ETHYLENICALLY UNSATURATED MONOMER SELECTED FROM THE GROUP CONSISTING OF STYRENE, STYRENES SUBSTITUTED WITH LOWER ALKYL IN THE ALPHA POSITION, ALKYL ESTERS OF ACRYLIC ACID AND ALKYL ESTERS OF ACRYLIC ACID SUBSTITUTED IN THE ALPHA POSITION WITH LOWER ALKYL, (2) AN EPOXY COMPOUND CHARACTERIZED BY THE PRESENCE OF AT LEAST ONE EPOXY GROUP PER MOLECULE AND SELECTED FROM THE GROUP CONSISTING OF POLYGLICYDYL ETHERS OF AROMATIC POLYHYDROXY COMPOUNDS, EPOXIDIZED UNSATURATED OILS, POLYALLYL GLYCIDYL ETHERS, 3,4-EPOXY-6METHYLCYCLOHEXYLMETHYL - 3,4 - EPOXY-6-METHYLCYCLOHEXANE CARBOXYLATE, DIPENTENE DIOXIDE AND DICYCLOPENTADIENE DIOXIDE, AND (3) AN AMINO RESIN SELECTED FROM THE GROUP CONSISTING OF UREA-FORMALDEHYDE AND MELAMINE-FORMALDEHYDE CONDENSATES, THE AMOUNT OF SAID VINYL COPOLYMER AND OPOXY COMPOUND BEING SUCH THAT SAID COMPOSITION CONTAINS APPROXIMATELY EQUIVALENT AMOUNTS OF EPOXY-REACTIVE GROUPS AND EPOXY GROUPS, COATING A METAL SUBSTRATE WITH THE RESULTANT MIXTURE AND THEN BAKING THE SUBSTRATE AT A TEMPERATURE BETWEEN 150* AND 210*C. FOR 30 TO 15 MINUTES.

Claim 2

A METHOD OF MAKING AN ORGANIC COATING ON SURFACES WHICH COMPRISES SIMULTANEOUSLY MIXING AS THE SOLE ESSENTIAL REACTING CONSTITUENTS AT AN ELEVEATED TEMPERATURE BETWEEN 30 AND 90*C. IN THE PRESENCE OF A NON-AQUEOUS ORGANIC SOLVENT (1) A VINYL COPOLYMER HAVING AN ACID NUMBER BETWEEN 30 AND 150 WHICH IS A COPOLYMER OF MONOMERS CONSISTING ESSENTIALLY OF (A) A MEMBER OF THE GROUP CONSISTING OF ACRYLIC ACID, ACRYLIC ACIDS SUBSTITUTED IN THE ALPHA POSITION WITH LOWER ALKYL, MALEIC ACID AND MALEIC ANHYDRIDE, AND (B) AN ETHYLENICALLY UNSATURATED MONOMER SELECTED FROM THE GROUP CONSISTING OF STYRENE, STYRENES SUBSTITUTED WITH LOWER ALKYL IN THE ALPHA POSITION, ALKYL ESTERS OF ACRYLIC ACID AND ALKYL ESTERS OF ACRYLIC ACID SUBSTITUTED IN THE ALPHA POSITION WITH LOWER ALKYL, (2) AN EPOXY COMPOUND CHARACTERIZED BY THE PRESENCE OF AT LEAST ONE EPOXY GROUP PER MOLECULE AND SELECTED FROM THE GROUP CONSISTING OF POLYGLICYDYL ETHERS OF AROMATIC POLYHYDROXY COMPOUNDS, EPOXIDIZED UNSATURATED OILS, POLYALLYL GLYCIDYL ETHERS, 3,4-EPOXY-6METHYLCYCLOHEXYLMETHYL - 3,4 - EPOXY-6-METHYLCYCLOHEXANE CARBOXYLATE, DIPENTENE DIOXIDE AND DICYCLOPENTADIENE DIOXIDE, AND (3) AN AMINO RESIN SELECTED FROM THE GROUP CONSISTING OF UREA-FORMALDEHYDE AND MELAMINE-FORMALDEHYDE CONDENSATES, THE AMOUNT OF SAID VINYL COPOLYMER AND OPOXY COMPOUND BEING SUCH THAT SAID COMPOSITION CONTAINS APPROXIMATELY EQUIVALENT AMOUNTS OF EPOXY-REACTIVE GROUPS AND EPOXY GROUPS, COATING A METAL SUBSTRATE WITH THE RESULTANT MIXTURE AND THEN BAKING THE SUBSTRATE AT A TEMPERATURE BETWEEN 150* AND 210*C. FOR 30 TO 15 MINUTES.