Water dilutable coating compositions containing precondensates of phenol resols and etherified phenol resols

Abstract

Abstract WATER-DILUTABLE HEAT-CURABLE COATING COMPOSITIONS FOR ELECTROPHORETIC DEPOSITION COMPRISING THE FOLLOWING COMPONENTS: (1) PRECONDENSATES OF HYDROPHILIC PLASTICIZING EPOXY RESIN PARTIAL ESTERS WITH THERMOSETTING ALDEHYDE PRODUCTS FORMED BY HEATING TO TEMPERATURES OF ABOUT 80 TO 160*C. IN THE PROPORTIONS OF ABOUT 1 TO 50 PERCENT BY WEIGHT OF SAID THERMOSETTING ALDEHYDE PRODUCTS TO SAID PARTIAL ESTERS, SAID PRECONDENSATES HAVING A GARDNER-HOLDT VISCOSITY OF ABOUT B TO Q MEASURED AT 50 PERCENT IN BUTYL GLYCOL AND AN ACID NUMBER RANGE OF 60 TO 100, WHEREIN: (A) SAID HYDROPHILIC PLASTICIZING EPOXY RESIN PARTIAL ESTERS ARE SELECTED FROM THE GROUP CONSISTING OF: (1) THE PARTIAL ESTER COMPOUNDS CONTAINING EPOXY GROUPS OR HYDROXYL GROUPS PRODUCED BY HYDROLYTIC CLEAVAGE OF SAID EPOXY GROUPS WITH AT LEAST ONE MONOCARBOXYLIC ACID AND A POLYBASIC CARBOXYLIC ACID; (2) THE PARTIAL ESTERS OF COMPOUNDS CONTAINING EPOXY GROUPS OR HYDROXYL GROUPS PRODUCED BY HYDROLYTIC CLEAVAGE OF SAID EPOXY GROUPS WITH A POLYBASIC CARBOXYLIC ACID; AND (3) MIXTURES OF (1) AND (2); WHEREIN SAID POLYBASIC CARBOXYLIC ACID OF (1) AND (2) COMPRISES HYDROLYZED ADDUCTS SELECTED FROM THE GROUP CONSISTING OF MALEIC ACID WITH FATTY ACIDS AND MALEIC ANHYDRIDE WITH FATTY ACIDS, SAID FATTY ACIDS ARE SELECTED FROM THE GROUP CONSISTING OF DRYING OIL ACIDS AND SEMI-DRYING OIL ACIDS, THE MOLAR PROPORTIONS OF FATTY ACID TO MALEIC ACID OR MALEIC ANHYDRIDE BETWEEN ABOUT 0.9:1 AND 1.1:1 AND THE MOLAR PROPORTION OF FREE HYDROXYL GROUPS TO FREE CARBOXYL GROUPS IS BETWEEN ABOUT 1:0.8 AND 1:1, WHEREIN ONE EPOXY GROUP IS CALCULATED AS TWO HYDROXYL GROUPS AND ONE ANHYDRIDE GROUP IS CALCULATED AS TWO CARBOXYL GROUPS, SAID ADDUCTS CONTAINING NO MORE THAN 3 PERCENT FREE MALEIC ANHYDRIDE; AND (B) SAID THERMOSETTING ALDEHYDE PRODUCTS ARE SELECTED FROM THE GROUP CONSISTING OF (1) PHENOL RESOLS; (2) ETHERIFIED PHENOL RESOLS; (II) STRONG NITROGENOUS BASES FORMING SOAPS WITH THE SAID HYDROPHILIC PLASTICIZING EPOXY RESIN PARTIAL ESTERS; AND (III) WATER.

Inventors

• 👤 R Gueldenpfennig

Bibliographic Details