Rhone-Poulenc Chimie

Rhodia Fiber & Resin Intermediates

Edith Canivenc

Michel M Gay

Gerard Lang

Serge Forestier

Herve Richard

Andrew Van Der Spuy

Jose-Luis Roca-Ortega

Etienne Fleury

Dominique Horbez

Jean-Francois Fiard

The invention concerns a method for extracting by electrodialysis a compound comprising at least amine functions capable of protonation from a liquid medium. More particularly it concerns a method for extracting, and separating at least the monomers comprising amine functions capable of protonation from a liquid medium derived from the hydrolysis of polyamides. The method of extraction from a liquid medium consists in subjecting to protonation the amine function(s) of the compounds to be extracted by adjusting the pH of the medium and in separating the compounds by passing them through a cationic membrane under the effect of an electric current. The invention is particularly applicable in processes for the chemical stabilisation of polyamides such as the PA 66 PA 6.

Method for extracting amine compounds from a liquid medium

Process for conditioning textile materials in order to enable them to have, especially, a pleasant handle and a very low or even non-existent yellowing, characterized in that the textile materials are brought into contact with a composition comprising a polyorgano-siloxane having, per mole, at least one unit of general formula: ##EQU1## in which: R can represent a C.sub.1 -C.sub.4 alkyl radical;

Non-yellowing textile softening process in which a composition

Process for conditioning textile materials in order to enable them to have, especially, a pleasant handle and a very low or even non-existent yellowing, characterized in that the textile materials are brought into contact with a composition comprising a polyorganosiloxane having, per mole, at least one unit of general formula: ##EQU1## in which: R can represent a C.sub.1 -C.sub.4 alkyl radical;

Modified polymers based on graft polyester and their preparation process

Textiles substrates, e.g., cotton fabrics, are conditioned to impart good feel and hydrophilicity thereto, by impregnating same with an effective conditioning amount of a polydiorganosiloxane containing, per mole, at least two structural units of the formula:

Polyorganosiloxane softening/hydrophilizing of textile substrates

Linear and cyclic diorganopolysiloxanes containing benzotriazole functional groups are well suited for the coating of optical fibers and for lubricating plastics, e.g., PVC.

Diorganopolysiloxanes containing benzotriazole functional groups

Novel diorganopolysiloxanes containing benzalmalonate functional groups, well adapted as coatings for optical fibers, as well as lubricants for plastic substrates, e.g., PVC substrates, have one of the following formulae: ##STR1## in which A and/or B is a benzalmalonate radical.

Diorganopolysiloxanes comprising benzalmalonate functional groups

Linear and cyclic diorganopolysiloxanes containing dibenzoylmethane functional groups are well suited for the coating of optical fibers and for lubricating plastics, e.g., PVC.

Diorganopolysiloxanes containing dibenzoylmethane functional groups

3-Benzylidenecamphor-substituted diorganopolysiloxanes, well adopted for incorporation into coating and lubricant compositions (notably as a lubricant for PVC), have the structural formulae (1) and (2) ##STR1## wherein A and/or B is a 3-benzylidenecamphor moiety.

3-benzylidenecamphor-substituted diorganopolysiloxanes

Organopolysiloxane oils comprising acrylate and/or methacrylate functional groups, well adapted as additives for silicone elastomers, or for UV-curable silicone coating compositions, are prepared by transesterifying an organopolysiloxane including at least one (HOY)R.sub.2 SiO.sub.0.5 or (HOY)RSiO.sub.2/2 recurring unit, with a lower alkyl (meth)acrylate having the formula CH.sub.2 .dbd.CR'OCOR', in the presence of a catalytically effective amount of a tin compound.

Acrylate and/or methacrylate-substituted organopolysiloxanes

Diorganopolysiloxanes having the formula: ##STR1## are especially useful for the stabilization of polyvinyl chloride-based polymers.

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Lyons, France

Edith Canivenc