Coatings comprising polysilazanes for preventing scaling and corrosion

US8153199B2 · kind B2 · utility

Assignee

• AZ Electronic Materials (Luxembourg) S.A.R.L. · LU

Inventors

• Stefan Brand · Leutershausen, DE
• Andreas Dierdorf · Frankfurt, DE
• Hubert Liebe · Wiesbaden, DE
• Frank Osterod · Liederbach, DE
• Guenter Motz · Bayreuth, DE
• Martin Guenthner · Wiesau, DE

Key dates

• Filing date: Feb 12, 2007
• Grant date: Apr 10, 2012
• Expiry date: Nov 22, 2027

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C09D5/084
• WIPO field: Basic materials chemistry
• WIPO sector: Chemistry

Abstract

A coating for surfaces, comprising at least one of the polysilazanes having the formula 1 and/or formula 2where n is an integer and is dimensioned such that the perhydropolysilazane has a number-average molecular weight of 150 to 150 000 g/mol, a solvent and a catalyst and, if desired, one or more cobinders, for preventing scaling and corrosion on metal surfaces. The hardened coating has a thickness of 0.2-10 micrometers, preferably 0.3 to 5 micrometers. It is particularly useful as a protective coating for metals for preventing scaling and corrosion.