Manufacturing method null of the carboxyl group content polymer and the coating flux and the coating flux which designate the epoxide basic content building a bridge medicine as

摘要

A coating material contains: A) one or more carboxyl group-containing polymers with a mean molecular weight of 500 to 8000 and an acid number of 15 to 200 mg KOH/g as the essential binder constituent and B) one or more epoxide group-containing compounds as the crosslinking agent. The epoxide group-containing compound B is an epoxide group-containing copolymerizate with a mean molecular weight Mn of 300 to 5000, preferably 500 to 3500, and a non-uniformity (Mw/Mn), determined by gel permeation chromatography, « 3, preferably « 2, which is obtained by continuous mass polymerization at temperatures between 130 and 350 °C and pressures greater than 1 bar. The invention also relates to the process for producing the coating material and its use in lacquers for automobile repairs.