Mixed neutral vinyl resin/reactive vinyl resin coating compositions, and cans and/or container components coated therewith

Claim 1

A COATING COMPOSITION WHOSE LIQUID FILM-FORMING VEHICLE (A) IS A HOMOGENEOUS SINGLE-PHASE SOLUTION OF A BLEND OF THE RESINOUS MATERIALS I AND II IDENTIFIED BELOW IN INERT, VOLATILE ORGANIC SOLVENT AND (B) LAYS DOWN A CONTINUOUS, PORE-FREE BAKED FILM ADAPTED FOR NON-INJURIOUS PROLONGED CONTACT WITH FOODS AND BEVERAGES WHEN A WET APPLIED FILM THEREOF IS BAKED FOR 3 TO 11 MINUTES AT 305* F. TO 355*F., SAID BLEND OF RESINOUS MATERIALS CONSISTING ESSENTIALLY OF (I) 90-99% BY WEIGHT OF NEUTRAL RESIN SELECTED FROM THE GROUP CONSISTING OF CLASS A RESINS, CLASS B RESINS, AND MIXTURES THEREOF, (1) IN WHICH THE CLASS A RESINS ARE BINARY COPOLYMERS COMPOSED ESENTIALLY OF 5577% BY WT. OF VINYL CHLORIDE AND 45-23% BY WEIGHT OF NEUTRAL DIESTERS OF A,B UNSATURATED A AND B DICARBOXYLIC ACIDS SELECTED FROM THE GROUP CONSISTING OF MALEIC ACID, CHLOROMALEIC ACID AND FUMARIC ACID, EACH ALCOHOL RADICAL OF SAID DIESTERS BEING A HYDROCARBON RADICAL OF 1-10 CARBON ATOMS FREE OF ETHYLENIC UNSATURATION, (2) IN WHICH THE CLASS B RESINS ARE TERNARY COPOLYMERS COMPOSED ESSENTIALLY OF 55-80% BY WT. OF VINYL CHLORIDE, 3-23% BY WT. OF NEUTRAL ESTERS OF A,B UNSATURATED A AND B DICARBOXYLIC ACID SELECTED FROM THE GROUP CONSISTING OF MALEIC ACID, CHLOROMALEIC ACID AND FUMARIC ACID, EACH ALCOHOL RADICAL OF SAID DIESTERS BEING A HYDROCARBON RADICAL OF 1-10 CARBON ATOMS FREE OF ETHYLENIC UNSATURATION, AND 1-22% BY WT. OF NEUTRAL ALKYL ESTERS OF AN A,B UNSATURATED MONOCARBOXYLIC ACID SELECTED FROM THE GROUP CONSISTING OF ACRYLIC ACID AND METHACRYLIC ACID, EACH ALKYL GROUP THEREOF CONTAINING 6-12 CARBON ATOMS, AND (3) IN WHICH SAID CALSS A AND CLASS B RESINS, RESPECTIVELY, HAVE A RELATIVE VISCOSITY OF 1.27-1.60 AS MEASURED AT 20* C. IN A 1% BY WT. CYCLOHEXANONE SOLUTION THEREOF; AND (II), 1-10% BY WT. OF REACTIVE RESIN SELECTED FROM THE GROUP CONSISTING OF CLASS C RESINS, CLASS D RESINS AND MIXTURES THEREOF, (A) IN WHICH THE CLASS C RESINS ARE TERNARY COPOLYMERS COMPOSED ESSENTIALLY OF 65-91% BY WT. OF VINYL HALIDE, 9-35% BY WT. OF VINYL ESTER OF 1-6 CARBON ALIPHATIC MONOCARBOXYLIC ACID, AND AN ACIDIC COMPONENT WHOSE ACIDIC CONTENT IS EQUIVALENT TO .2-5% BY WT. OF MALEIC ANHYDRIDE, SAID ACIDIC COMPONENT BEING SELECTED FROM THE GROUP CONSISTING OF MALEIC ANHYDRIDE, MALEIC ACID, FUMARIC ACID AND 1-6 CARBON MONOALKYL ESTERS OF THE LATTER ACIDS, (B) IN WHICH THE CLASS D RESINS ARE PARTIALLY HYDROLYZED PRODUCTS OF A BINARY COPOLYMER CONSISTING ESSENTIALLY OF RESIDUES OF 65-91% BY WT. OF VINYL HALIDE AND 9-35% BY WT. OF VINYL ESTER OF 1-6 CARBON ALIPHATIC MONOCARBOXYLIC ACID, SAID PARTIALLY HYDROLYZED PRODUCT CONTAINING 3-10% BY WT. VINYL ALCOHOL RESIDUE AND A CONTENT OF UNHYDROLYZED VINYL ESTER RESIDUE AMOUNTING TO AT LEAST 3% BY WT., AND (C) IN WHICH THE CLASS C AND CLASS D RESINS RESPECTIVELY HAVE A MOLECULAR WEIGHT BETWEEN 5,000 AND 20,000 AS MEASURED BY THE STAUDINGER VISCOSITY METHOD.