Cationic electrodeposition coating composition and a process for

Details Cationic electrodeposition coating composition and a process for Cationic electrodeposition coating composition and a process for

1997-09-11

2000-11-14

Dawson, Robert

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Processes of preparing a desired or intentional composition...

204506, 523412, C08K 320, C08L 6302

Patent

active

061471445

ABSTRACT:
Disclosed are a cationic electrodeposition coating composition and a process for preparing the same in which the dried coating film of the electrodeposition paint has an epoxy-acrylic double-layered structure for displaying excellent properties, and in which an organic solvent content can be minimized. The cationic electrodeposition coating composition having a resinoid dispersed into an aqueous medium comprises a cationic electrodeposition resin and an organic solvent of less than 2.0 percent by weight based on a dispersed solution of the cationic electrodeposition resin. The cationic electrodeposition resin can be manufactured by means of a mixture comprising (i) 40-60 percent by weight of a cationic electrodeposition synthetic resin which is obtained by an epoxy-amino addition reaction, (ii) 5-10 percent by weight of an acrylic cationic electrodeposition synthetic resin having an amino group, (iii) 1-3 percent by weight of a fatty acid ester resin synthesized by an ester exchange reaction of styrene-arylalcohol copolymer and fatty acid, and (iv) 30-50 percent by weight of a blocked polyisocyanate crosslinking agent. The coating layer formed by means of the electrodeposition coating has improved properties with respect to an appearance, weather resistance, yellowing resistance, and hardness.

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patent: 3947339 (1976-03-01), Jerabek et al.
patent: 3984299 (1976-10-01), Jerabek
patent: 4007154 (1977-02-01), Schimmel et al.
patent: 4865705 (1989-09-01), Hendrikx et al.

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