Patent · US Active

Styrene-butadiene based redispersible polymer powders with improved stability in cement applications

US9199881B2 · kind B2 · utility

0Cited by

2References

6Claims

0Family size

Assignee

DOW GLOBAL TECHNOLOGIES LLC · US

Inventors

Etienne Lazarus · Bischwiller, FR
Gerold Lohmüller · Baden-Baden, DE
Juergen Dombrowski · Bodenwerder, DE
Hartmut Kuehn · Bodenwerder, DE
Margarita Perello · Stintenberger Straße, CH
Sonja Scharlemann · Großburgwedel, DE

Key dates

Filing date	Sep 21, 2011
Grant date	Dec 1, 2015
Priority date	—
Expiry date	Jul 15, 2032

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC08L2205/03
WIPO fieldMacromolecular chemistry, polymers
WIPO sectorChemistry

Abstract

A water redispersible polymer powder is produced by drying an aqueous mixture of a carboxylated styrene butadiene polymer and a colloidal stabilizer which includes a polyvinyl alcohol modified with an alkyl end chain. The alkyl modified polyvinyl alcohol provides excellent redispersibility of the redispersible polymer powder without adversely affecting spray drying. Cement compositions such as mortars, which contain the redispersible polymer powder with the alkyl modified polyvinyl alcohol exhibit unexpectedly superior stability and an unexpectedly lower rate of mortar viscosity buildup which is advantageous for workability or troweling.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.