Hydrolysis-stable mesoporous silica material and method for producing it

US10012630B2 · kind B2 · utility

Assignee

• Robert Bosch GmbH · DE

Inventors

• Thomas Pilz · Leonberg, DE
• Markus Widenmeyer · Schenefeld, DE

Key dates

• Filing date: Apr 14, 2016
• Grant date: Jul 3, 2018
• Expiry date: Apr 14, 2036

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C07F7/188
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

A hydrolysis-stable mesoporous silica material has surface bearing functional groups of formula OxSiR4-x, where x is in a range from 1-3 and where each of the radicals R independently of any other contains c carbon atoms, n nitrogen atoms and o oxygen atoms, for which At least ⅓ of the nitrogen atoms and of the oxygen atoms carries in each case at least one hydrogen atom or is ionic. At least one radical R of a functional group is crosslinked with another radical R of a different functional group. The material is produced by providing a mesoporous silica material and functionalizing the surface of the mesoporous silica material with at least one silane of formula YxSiR4-x, where x is in a range from 1-3 and where Y is a functional group which reacts with a hydroxyl group on the surface of the mesoporous silica material. There is crosslinking of the surface functionalities by treatment with a coupling reagent having at least two reactive groups, each reactive group reacting with a radical R.