E.i. Dupont De Nemours and Company

Herberts Gesellschaft MIT Beschrankter Haftung

Dirk Holfter

Dietrich Saatweber

Karl-Friedrich Doessel

Michael Becker

Birgit Laack

Bernhard Richter

Waltraud Krumm

A process for the high-speed rotary application of a liquid coating agent containing at least one pigment and/or at least one extender onto a substrate, wherein the process comprises the steps:

Process for the high-speed rotary application of liquid, pigmented coating agents

Process for the high-speed rotary application of liquid coating agents

A process for the application of aqueous multi-component coating compositions comprising at least two components and are prepared by premixing said components. The mixture is applied to a substrate using high-speed rotary atomization, wherein the high-speed rotary atomizer(s) is operated with a circumferential velocity of the spray edge(s) in the range of 10,000 to 25,000 m/min.

Process for the application of aqueous multi-component coating agents

Continuous process for recovering the overspray of aqueous coating agents during spray application by collecting it in an aqueous washing liquid which is continuously circulated in a circuit (A) to the spray booth, where the solids concentration of said washing liquid is maintained within the range of 1-1.5 wt.-%, whereby a part of the washing liquid containing overspray is fed to a first ultrafiltration circuit (B) in which the solids concentration of the circulating liquid is maintained within a range of 8-15 wt.-%, a part of the circulating liquid from ultrafiltration circuit (B) being fed to a further ultrafiltration circuit (C) in which the solids concentration of the circulating liquid is maintained approximately constant within a range between 35 wt.-% and the solids concentration corresponding to spray viscosity of the aqueous coating agent, whereas the permeate from circuits (B) and (C) is returned to circuit (A) in order to top up the washing liquid and at least a part of the liquid circulating in ultrafiltration circuit (C) is used as an aqueous coating agent for spray application in the spray booth or for preparation thereof.

Process for recovering the overspray of aqueous coating agents during

Growing community of inventors

Hagen, Germany

Dirk Holfter