Rhodianyl

Rhodia Chimie

Rhodia Operations

Christine Vidil

Franck Touraud

Christophe Paulo

Jean-François Sassi

Mikel Morvan

Marie-Pierre Labeau

Jean-Pierre Marchand

Hélène Lannibois-Drean

Sandrine Rochat

Natalia Scherbakoff

Jean-Paul La Grange

Bertrand Bordes

Jean-Francois Sassi

Jean-Paul Lagrange

The invention provides a novel thermoplastic polymer comprising at least one polyalkylene oxide block. It relates to a process for preparing the thermoplastic polymer and to an application of this polymer as a hydrophilicity and/or antistatic modifier, especially in polyamide compositions. These compositions are particularly suitable for the manufacture of yarns, fibres and filaments.

Thermoplastic polymer, use thereof in polyamide compositions with improved hydrophily and anti-staticity

The invention relates to thermoplastic compositions comprising a thermoplastic polyamide matrix and at least one additive which modifies the interaction between the matrix and an agent. The purpose of the invention is to provide an additive which modifies the interaction between a copolyamide-type thermoplastic copolyamide matrix and at least one agent. The aforementioned additive, which comprises at least one hyperbranched functionalised polymer, is not compatible with the matrix. Moreover, said additive can be used for the controlled modification of the interaction between the thermoplastic copolyamide and an internal or external chemical agent. Preferably, the composition does not contain hyperbranched polymers which produce therein a reduction in the molar mass of matrix M which is greater than or equal to 7% in relation to a sample composition which comprises matrix M but does not contain hyperbranched polymer additive(s). Said mass measurement is taken preferably using a determined protocol P. The invention is suitable for use in moulding, injection moulding, injection/blow moulding, extrusion/blow moulding, extrusion or spinning.

Thermoplastic composition comprising a hyperbranched polymer additive and articles made using said material

The invention concerns a method for preparing an oil-in-water emulsion whereof the organic phase has a viscosity not less than 1 Pa.s, which consists in using an aqueous phase comprising at least a heat-thickening polymer having a viscosity jump between 25 and 80&#xb0; C. so that the value of the ratio log 10 (viscosity at 80&#xb0; C.)/log 10 (viscosity at 25&#xb0; C.) is at least equal to 1, preferably at least equal to 2, the variation in viscosity being reversible; the amount of heat-thickening polymer being such that the aqueous phase viscosity is 0.2 to 5 times that of the organic phase at the temperature for preparing the emulsion; the latter being not less than the thickening temperature of the heat-thickening polymer.

Process for preparing an emulsion whose organic phase is of high viscosity

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Communay, France

Christine Vidil