Process for electro-deposition of bituminous materials

Claim 1

A PROCESS FOR ELECTRO-DEPOSITING ON A METAL SURFACE AN ASPHALT FROM A CATIONIC EMULSION THEREOF IN WATER, CONTAINING A CATION-ACTIVE EMULSIFYING HALIDE SALT F A QUATERNARY NITROGEN-CONTAINING BASE SELECTED FROM THE GROUP CONSISTING OF QUATERNARY AMMONIUM BASES AND ORGANO-SUBSTITUTED HETEROCYCLIC NITROGEN BASES AND CHARACTERIZED BY THE PRESENCE OF A LONG C12-C24 ALIPHATIC HYDROCARBON CHAIN IN ITS CATION-ACTIVE PORTION, SAID EMULSION HAVING A PH FROM ABOUT 2.0 TO ABOUT 6.0 AND CONSISTING ESSENTIALLY OF FROM ABOUT 10 TO ABOUT 30% BY WEIGHT OF AN ASPHALT, SUFFICIENT AMOUNT OF SAID CATION-ACTIVE QUATERNARY NITROGEN-CONTAINING SALT FOR EMULSIFYING THE ASPHALT IN WATER AND TO FORM A PUMPABLE, MECHANICALLY STABLE EMULSION AND WATER IN AN AMOUNT TO MAKE UP 100% BY WEIGHT; THE PROCESS COMPRISING THROUGHLY CONTACTING A METAL SURFACE WITH SAID EMULSION AND PASSING A DIRECT ELECTRIC CURRENT THEREGTHROUGH AT AN AVERAGE DENSITY OF AT LEAST ABOUT 2.5 MILLIAMPERES PER SQUARE INCH AND IN SUCH A DIRECTION THAT THE METAL SURFACE TO BE TREATED CONSTITUTES THE CATHODE, WHEREBY A UNIFORM FILM OF ASPHALT IS DEPOSITED THEREON.