Dow Global Technolgoies LLC

Trinseo Europe Gmbh

Styron Europe Gmbh

Etienne Lazarus

Margarita Perello

Gerold Lohmüller

Hartmut Kuehn

Juergen Dombrowski

Jürgen Dombrowski

Francois M Casati

Robert Baumann

Sonja Scharlemann

Nicolas Tissier

Bernard Fouchet

Ursula Seiler

Nathalie A Hahn-Behrens

Yafei Zhu

Gerold A Lohmuller

Alexander K Hipp

Harmut Kühn

Hartmut Kühn

Donato Ventresca

Francis Dobler

Gerold Lohmueller

Pekka Salminen

Hartnut Kuehn

Gerold A Lohmüller

Juergen Dombroski

Gerald Adolf Lohmüller

Josef H Burgert

Stefan E Sandas

The present invention relates to a process for preparing a polymer latex that includes polymerizing one or more ethylenically unsaturated aromatic monomers and one or more conjugated diene monomers in the presence of a hydroperoxide chain transfer agent and sulfur-containing chain transfer agent, wherein the sulfur-containing chain transfer agent is added after the hydroperoxide chain transfer agent. It further relates to the polymer latex thus obtained, to a composition comprising the polymer latex and to the use of the polymer latex or polymer latex composition in a carpet backing, paper coating, or fiber fabric pre-impregnation process.

Polymer latex with improved mechanical properties and process for preparing said polymer latex

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.

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

Redispersible polymer powder compositions which include a polyglycol in admixture with a redispersible polymer powder (RDP), which powder includes a codried mixture of a carboxylated, water insoluble film-forming styrene butadiene polymer and a colloidal stabilizer, results in cement compositions having unexpectedly superior overall bonding strength and adhesion after water immersion. Use of the polyglycol provides good workability or ease of troweling during application. In addition, the RDP composition, which includes the RDP and the polyglycol, provides the cement-based composition with excellent abrasion resistance, surface appearance, and color. Also, the RDP composition provides for at least a 30% reduction, for example a 50% or more reduction in the amount of retarder or retardant employed in the dry mix formulation for cement compositions, such as self leveling flooring compounds or compositions, and cement-based tile adhesives.

Redispersible polymer powder compositions prepared from styrene butadiene-based latex for dry mix formulations

Polymer powders comprising in copolymerized form

Water-redispersible polymer powder

Embodiments of the present disclosure include a polyvinyl ester-based latex having polyvinyl ester-based particles with vinyl ester groups that have been partially hydrolyzed to a predetermined degree, and methods of modifying and forming the polyvinyl ester-based latex of the present disclosure. Embodiments of the present disclosure also include coating compositions that include the polyvinyl ester-based latex of the present disclosure and an optical brightening agent (OBA), where the polyvinyl ester-based particles act as a carrier for the OBA in a coating composition for a print media substrate.

Polyvinyl ester-based latex coating compositions

A water redispersible polymer powder is produced by drying an aqueous mixture of a high Tcarboxylated styrene butadiene polymer and a low Tcarboxylated styrene butadiene polymer, where the ratio of the mean or average particle size of the high Tpolymer to the particle size of the low Tpolymer is from 1:1 to 5:1, preferably from 1:1 to 3:1, and the amount of the high Tpolymer is from 20 wt. % to 35 wt. %, preferably from 25 wt. % to 30 wt. %, based upon the total weight of the high Tpolymer and the low Tpolymer. Cement compositions such as mortars, which contain the redispersible polymer powder exhibit unexpectedly superior high bond strength and high impact resistance.

Redispersible polymer powders prepared from blends of carboxylate

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Marienthal, France

Etienne Lazarus