Filamentous polymer particles and use thereof as rheology modifiers

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United States of America Patent

PATENT NO 9078837
APP PUB NO 20140039067A1
SERIAL NO

13996766

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Abstract

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The invention relates to polymer particles in the form of filaments formed by block copolymers, as well as to the use thereof as rheology modifiers for aqueous or organic solutions. A first aspect of the invention relates to filamentous polymer particles having a length/diameter ratio greater than 100, said particles being formed by block copolymers synthesized by controlled radical emulsion polymerization in emulsion, performed using at least one hydrophobic monomer in the presence of a water-soluble marcoinitiator. The invention is characterized in that the filamentous particles are obtained in an aqueous medium for the synthesis of said block copolymers, performed by heating the reaction medium to a temperature of 60 to 120° C., the final block copolymer containing between 10 and 50 mol. % of the water-soluble macroinitiator and the hydrophobic monomer conversion rate being at least 50%. A second aspect of the invention relates to a method for modifying the rheology of an organic or aqueous solution using said filamentous polymer particle.

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Patent Owner(s)

Patent OwnerAddress
ARKEMA FRANCE51 ESPLANADE DU GÉNÉRAL DE GAULLE LA DÉFENSE 92800 PUTEAUX 92700
CENTRE NATIONAL DE LA RECHERCHE SCIENTIFIQUE3 RUE MICHEL-ANGE PARIS 75016
UNIVERSITE PIERRE ET MARIE CURIETOUR CENTRALE 4 PLACE JUSSIEU F-75252 PARIS CEDEX 05
UNIVERSITE CLAUDE BERNARD LYON 143 BOULEVARD DU 11 NOVEMBRE 1918 VILLEURBANNE 69100
ECOLE SUPERIEURE DE CHIMIE PHYSIQUE ELECTRONIQUE DE LYON43 BOULEVARD DU 11 NOVEMBRE 1918 VILLEURBANNE 69100

International Classification(s)

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Brusseau, Segolene Cachan, FR 3 8
Charleux, Bernadette Lyons, FR 18 98
Couvreur, Laurence Paris, FR 9 38
Inoubli, Raber Pau, FR 32 36
Magnet, Stephanie Morlanne, FR 18 54

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