Powder coating materials, processes for their preparation and use of the powder coating materials for coating of metal sheets

摘要

the present invention relates to pulverlacke based on low molecular weight polyesters containing carboxylic groups and, epoxidgruppen hu00e4rtungsmitteln containing the fact is that the pulverlacke as filmbildendes material $(a) 35.0 - 92.2 wt. -% containing carboxylic groups polyester with a su00e4urezahl from 10 to 150 mg koh / g $b) 0.8 20.1%.-% low molecular weight, epoxidgruppen containing hu00e4rtungsmittel, $a (c) 3.7 - 49.3% w / w epoxidgruppen polyacrylatharze containing a epoxidu00e4quivalentgewicht 350 - 2000 and $a (d) 0.5 to 4 wt. -% low molecular weight di - and / or polycarbonsu00e4uren and / or di - and / or polyanhydride $(a) w obei is the sum of the weightings of (a), (b), (c) and (d) at 100%.-% and the ratio of epoxidgruppen the pulverlacke to the sum of carboxyl and anhydridgruppen the pulverlacke 0.75 - 1.25: 1. the present invention also relates to $a, a process for the production of erfindungsgemu00e4u00dfen pulverlacke and their use for coating of mead allblechen, according to the pulverlackapplikation and hardening deformation.