Surfactant compositions

C - Chemistry – Metallurgy – 11 – D

Patent

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Details

C11D 3/37 (2006.01) B01F 17/00 (2006.01) C08L 83/06 (2006.01) C11D 1/65 (2006.01)

Patent

CA 2092951

Synergistic surfactant compositions. Polysiloxane-polyoxyalkylene copolymers in which the polyether pendants bear carboxylic acid groups or salts of carboxylic acid groups are demonstrated to have synergystic interactions with anionic and cationic organic surfactants to improve the surface characteristics of a solution, requiring unexpectedly low concentrations to obtain specific surface tension values or to attain critical micelle concentrations in aqueous solutions. Compositions containing an organic surfactant and a polysiloxane-polyoxyalkylene copolymer bearing carboxyl groups are claimed. A method for modifying the surface properties of an aqueous system by employing such compositions as components of the system is also claimed.

Compositions de surfactant synergiques. Il est démontré que des copolymères de polysiloxane-polyoxyalcénylène dans lesquels les polyéthers portent des groupes carboxyliques (acide ou sel) ont des interactions synergiques avec les surfactants organiques anioniques et cationiques qui ont pour effet d'améliorer les caractéristiques de surface d'une solution et qui nécessitent des concentrations étonnamment faibles pour obtenir des valeurs de tension de surface spécifique ou pour atteindre les concentrations critiques pour la formation de micelles dans les solutions aqueuses. Des compositions contenant un surfactant organique et un copolymère de polysiloxane-polyoxyalcénylène portant des groupes carboxyle sont revendiquées. Une méthode pour modifier les propriétés de surface d'un système aqueux à l'aide de ces compositions comme constituants d'un système est également revendiquée.

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