Use of polyurethane powder as inner additive of redispersible polymer powder

US9932268B2 · kind B2 · utility

Assignee

• DOW GLOBAL TECHNOLOGIES LLC · US

Inventors

• Juergen Dombrowski · Bodenwerder, DE
• Hartmut Kuehn · Bodenwerder, DE
• Margarita Perello · Stintenberger Straße, CH
• Sonja Scharlemann · Großburgwedel, DE

Key dates

• Filing date: Oct 24, 2012
• Grant date: Apr 3, 2018
• Expiry date: Jun 11, 2033

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08J2375/04
• WIPO field: Materials, metallurgy
• WIPO sector: Chemistry

Abstract

A powdered polyurethane, preferably a powdered recycled polyurethane rigid foam is co-dried with a water insoluble film-forming polymer to obtain a redispersible polymer powder composite for use in hydraulic binders or cementitious compositions to improve performance of cementitious compositions or mortar, in applications such as cement based the adhesives (CBTA), or external thermal insulating composite systems (ETICS).