Aurelio J Parenti

49579525, Sep 18, 1990

Feb 21, 1990

7/485773

Kazys Sekmakas - St. Petersburg Beach FL
Aurelio Parenti - Norridge IL

DeSoto, Inc. - Des Plaines IL

C08G 5914
C08L 6300

523402

Thermosetting aqueous anionic electrocoating composition are disclosed which comprise a carboxyl-functional anionic polymer dispersed in water with the aid of water miscible organic solvent and a volatile base, and from about 1% to about 5%, based on the weight of the polymer content of the composition, of an oxirane-free epoxy phosphate, this epoxy phosphate being produced by slowly and incrementally adding a resinous polyepoxide to a solvent solution containing from 0. 05 to 0. 9 mole of orthophosphoric acid per oxirane equivalent in the polyepoxide together with sufficient water to hydrolyze all of the oxirane functionality which is not consumed by the orthophosphoric acid. These epoxy phosphates improve the corrosion resistance of electrodeposited cured coatings without objectionably wrinkling their surface.

43416810, Jul 27, 1982

May 18, 1981

6/264943

Kazys Sekmakas - Palatine IL
Raj Shah - Schaumburg IL
Aurelio J. Parenti - Norridge IL

De Soto, Inc. - Des Plaines IL

C08K 520

524555

Cationic solution addition copolymers of monoethylenically unsaturated copolymerizable monomers are described having Mannich base side chains with the structure: ##STR1## where R and R' are selected from C. sub. 1 -C. sub. 8 alkyl and C. sub. 1 -C. sub. 8 alkanol, or are together constituted by a C. sub. 2 -C. sub. 8 alkylene group. This copolymer is preferably reacted with a diepoxide in a stoichiometric deficiency with respect to the amine groups in the side chains. At least a portion of the tertiary amine groups are then reacted with a solubilizing acid to form a salt which enables the copolymer to be dissolved in water.

47375299, Apr 12, 1988

Apr 3, 1986

6/847648

Kazys Sekmakas - St. Petersburg Beach FL
Aurelio Parenti - Norridge IL

DeSoto, Inc. - Des Plaines IL

C08L 6302
C08L 3314

523411

Aqueous thermosetting cationic electrocoating compositions are disclosed in which an amine-functional cationic polymer is dispersed in water with the aid of an acid, a curing agent being added if the polymer is not self-curing, and there is added from 1% to 30% of the polymer content of the composition of an oxirane-free epoxy phosphate. This epoxy phosphate is produced by slowly and incrementally adding a resinous polyepoxide to a solvent solution containing from 0. 05 to 0. 9 mole of orthophosphoric acid per oxirane equivalent in said polyepoxide together with sufficient water to hydrolyze all of the oxirane functionality which is not consumed by the orthophosphoric acid. When the epoxy phosphate is made in the manner set forth, the salt spray resistance of electrodeposited cured films is improved.