Coating agents, their use as clear coats and processes for the production of multicoat lacquer finishes

US5552184A · kind A · utility

Assignee

• Herberts Gesellschaft mit beschrankter Haftung · DE

Inventors

• Peter Klostermann · Sprockhövel, DE
• Hans-Martin Schonrock · Wuppertal, DE
• Klaus Schröter · Schwelm, DE
• Thomas Kutzner · Sprockhövel, DE

Key dates

• Filing date: Dec 16, 1994
• Grant date: Sep 3, 1996
• Expiry date: Dec 16, 2014

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T428/31551
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

A coating agent with a viscosity of 100-1000 mPa.s, measured by rotational viscometry at 70.degree. C. and a shear rate of 235 s.sup.-1, containing 45-85 wt % of one or more polyesters, that have a branched structure and are essentially free from aromatic structural units, with a number-average molecular weight (M.sub.n) of 350-3000 and a polydispersity of less than 3.5, 10-40 wt % of one or more cross-linkers based on aminoplastic resins and/or blocked di- and/or polyisocyanates, 0-20 wt % of one or more reactive diluents, and 0-10 wt % of one or more organic solvents. They are particularly suitable as hot-sprayable clear coats for multicoat lacquer finishes.