Process for the preparation of an aqueous coating composition, aqueous coating compositions, and the use thereof for coating packaging containers

摘要

PCT No. PCT/EP92/02123 Sec. 371 Date Mar. 14, 1994 Sec. 102(e) Date Mar. 14, 1994 PCT Filed Sep. 16, 1992 PCT Pub. No. WO93/06146 PCT Pub. Date Apr. 1, 1993The present invention relates to a process for the preparation of an aqueous coating composition containing a carboxyl-containing epoxy resin having an acid number in the range from 5 to 200 mg of KOH/g and having an epoxide equivalent weight in the range from 1000 to 40,000, optionally crosslinking agents, organic solvents, optionally conventional assistants and additives, and optionally pigments and fillers. The organic binder solution is neutralized using a tertiary amine in the temperature range from 60 DEG C. to 120 DEG C. This is followed by dispersion in water, with the proviso that at least 95% of the epoxide groups of the epoxy resin have been reacted. The aqueous coating compositions prepared by the process are preferably used for coating cans.