Synthesis of oligosilazane-containing compounds for the production of a ceramic-like material

US6544657B1 · kind B1 · utility

Assignee

• The Federal State of Bavaria, Germany as represented by The University of Bayreuth · DE

Inventors

• Gunter Motz · Bayreuth, DE
• Frauke Stenzel · Herrnburg, DE
• Gunter Ziegler · Koblenzer Straße, DE

Key dates

• Filing date: Oct 10, 2000
• Grant date: Apr 8, 2003
• Expiry date: Oct 10, 2020

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T428/31612
• WIPO field: Surface technology, coating
• WIPO sector: Chemistry

Abstract

The invention concerns a synthesis method for an oligosilazane-containing condensation product comprising the following step:conversion of oligosilazane composition with an average molecular weight of no more than 1000 g/mol,with a dialk(en)ylamino compound of the following formula (I)A[N(R4)2]m  (I)in which A is at least one element chosen from B, Al, Ti, Zr, and Hf, R4 is an alkyl group or alkenyl group and m is the valence of element A,in which the reaction is run so that an average of 1.6-2.2 mol HN(R4)2 per mol of dialk(en)ylamino compound of formula (I) is split off;an oligosilazane-containing condensation product obtained according to this method; a method for production of a substrate coated or infiltrated with a ceramic-like material, comprising the following steps:coating or infiltration of the substrate with a solution of the aforementioned oligosilazane-containing condensation product, evaporation of the product and curing of the oligosilazane-containing condensation product,as well as a coated or infiltrated substrate obtained according to this method.