Method for conditioning rubber surfaces and forming flexible resin coatings thereon and the articles produced thereby

Claim 1

A METHOD FOR FORMING A FLEXIBLE RESINOUS COATING ON A RUBBER SURFACE WHICH COMPRISES THE STEPS OF POLARIZING THE SAID RUBBER SURFACE BY CONTACTING THE SURFACE WITH AN AQUEOUS ACIDIC SOLUTION HAVING AN ACIDITY EQUIVALENT TO THAT RESULTING FROM THE PRESENCE THEREIN OF ABOUT 0.5% TO ABOUT 10% OF CONCENTRATED SULFURIC ACID, DRYING THE SAID SURFACE, AND THEREAFTER APPLYING TO SAID SURFACE A COMPOSITION COMPRISING 14% TO 19% POLYESTER RESIN, 11% TO 13% POLYFUNCTIONAL ISOCYANATE, 1% TO 3% LAMPBACK 2% TO 6% SILICA POWDER, 0.15%-04% CELLULOSE ACETATE BUTYRATE 0.25% TO 0.8% OF AN AMINE CURING AGENT 0.005% TO 0.03% OF A SMOOTHING AGENT SELECTED FROM THE GROUP CONSISTING TO CHLORO- AND FLUORO-SILANES HAVING 1-18 CARBON ATOMS, AND CHLORO- AND FLUROSILOXANE RESIN, 3% TO 5% LIQUID ISOCYANATE TERMINATED POLYEPOXY RESIN, 3% TO 5% LIWUID ISOCYANATE TERMINATED POLYURETHANE ELASTOMER, SAID ELASTOMER CONTAINING APPROXIMATELY 4% NCO BY WEIGHT AND HAVING A SPECIFIC GRAVITY OF 1.06, 1% TO 8% HYDROXY TERMINATED POLYURETHANE POLYMER FORMED BY THE REACTION BETWEEN A LINEAR POLYGLYCOL AND A DISOCYANATE, AND 42% TO ABOUT 51% SOLVENT FOR SAID RESINOUS INGREDIENTS, DRYING THE SAID COATING AND THEREAFTER BAKING THE COATED RUBBER ARTICLE AT A TEMPERATURE IN THE RANGE OF 265* F. 285* F. UNTIL THE RESINOUS INGREDENTS ARE CURVED.