abstract |
PCT No. PCT/EP90/01173 Sec. 371 Date Jan. 24, 1992 Sec. 102(e) Date Jan. 24, 1992 PCT Filed Jul. 18, 1990 PCT Pub. No. WO91/02036 PCT Pub. Date Feb. 21, 1991.The present invention relates to coating agents containing A) one or more polymers containing carboxyl groups and having a number-average molecular weight of 500 to 8,000 and an acid number of 15 to 200 mg of KOH/g as the essential binder component and B) one or more compounds containing epoxide groups as crosslinking agents, wherein the compound B containing epoxide groups is a copolymer containing epoxide groups, has a number-average molecular weight Mn of 300 to 5,000, preferably 500 to 3,500, and a heterogeneity (Mw/Mn), measured by gel permeation chromatography, of <=3, preferably of <=2, and has been prepared by continuous bulk polymerization at temperatures between 130 degrees and 350 degrees C. and pressures above 1 bar. The invention also relates to processes for the preparation of the coating agent and the use of the coating agents in automobile refinishing. |