Use of compositions based on organically modified silicic acid polycondensates for coating teeth and dental prostheses

US5401528A · kind A · utility

Assignee

• Thera Patent GmbH & Co KG Gesellschaft fur Industrielle Schutzrechte · DE

Inventor

• Monika Schmidt · Orlamünde, DE

Key dates

• Filing date: Nov 19, 1992
• Grant date: Mar 28, 1995
• Expiry date: Nov 19, 2012

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08G77/22
• WIPO field: Pharmaceuticals
• WIPO sector: Chemistry

Abstract

Compositions are used for coating teeth and dental prostheses based on a mixture of PA0 (a) at least one compound that is soluble in the reaction medium having the formula (I) EQU MR.sub.x (I) PA0 in which M means Ti, Zr, Si, Ge, Sn or Al, R means halogen, hydroxy, alkoxy, acyloxy or a chelate ligand, and x means the valency of M, and PA0 (b) an organic silane having the formula (II) EQU R".sub.n SiX.sub.4-n (II) PA0 in which R" means alkyl, alkenyl, aryl, arylalkyl, alkylaryl, arylalkenyl or alkenylaryl, where said radicals may be interrupted by oxygen or sulfur atoms or --NH-- groups, X means hydrogen, halogen, hydroxy, alkoxy, acyloxy or the group --NR.sub.2 ' (R'=hydrogen and/or alkyl) and n has the value 1, 2 or 3, and/or PA0 (c) an organofunctional silane having the formula (III) EQU R.sub.m "(R"'Y).sub.n SiX.sub.(4-m-n) (III), PA0 in which R", X and n have the meaning given above, R"' means alkylene, phenylene, alkylene phenylene or alkenylene, where said radicals may be interrupted by oxygen or sulfur atoms or --NH-- groups, Y means halogen atoms, hydroxy, mercapto, polyol, e.g., glycyl or glyceryl, optionally substituted amino, quaternary ammonium, amide, polyamide, aldehy…