Alkyl silicone resin as additive for hyrophobising fibre cement

US12043704B2 · kind B2 · utility

Assignee

• Wacker Chemie AG · DE

Inventors

• Steffen DOERRICH · Munich, DE
• Georg Loessel · Emmerting, DE
• Pedro Marani · São Paulo, BR
• Daniel Schildbach · Altötting, DE
• Volker Stanjek · Ampfing, DE

Key dates

• Filing date: Jan 19, 2018
• Grant date: Jul 23, 2024
• Expiry date: Nov 22, 2040

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C04B2103/65
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

Alkylsilicone resins containing at least 20 mol percent of siloxy units bearing a >Cs alkyl group and having from 5-20 weight percent of alkoxy groups may be prepared directly by hydrolysis of chlorosilanes, and are highly effective as bulk hydrophobing agents in the preparation of fibrocement.