Method for coating surfaces and use of the articles coated using said method

US9539611B2 · kind B2 · utility

Assignee

• CHEMETALL GMBH · DE

Inventors

• Daniel Wasserfallen · Mainz, DE
• Michael Schwamb · Frankfurt, DE
• Cindy Ettrich · Frankfurt am Main, DE
• Vera Sotke · Schwalbach am Taunus, DE
• Martin Droll · Schlangen, DE
• Oliver Seewald · Marsberg, DE
• Wolfgang Bremser · Münster, DE
• Aliaksandr Frenkel · Frankfurt, DE

Key dates

• Filing date: Sep 12, 2011
• Grant date: Jan 10, 2017
• Expiry date: Sep 6, 2033

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T428/265
• WIPO field: Surface technology, coating
• WIPO sector: Chemistry

Abstract

A method for electroless coating of substrates by applying an activating coat of polyelectrolyte or salt with a first aqueous composition; rinsing the activating coat such that the activating coat not being entirely removed; contacting and coating of the activated surfaces that have remained after rinsing with an aqueous composition in the form of a solution, emulsion or suspension, to form an organic secondary coat; and drying. The activating coat is a solution, emulsion or suspension containing a anionic polyelectrolyte or at least one anionic salt in solution in water. The aqueous composition forming the secondary coat has constituents which can be precipitated, deposited or salted out and which are anionically, zwitterionically, sterically or cationically stabilized. The dry film formed in the process, comprising the activating coat and the secondary coat, has a thickness of at least 1 μm.