Solvay (societe Anonyme)

Centre National De La Recherche Scientifique

Commissariat a L'energie Atomique

Universitè De Montpellier

Solvay Sa

Areva Nc

Ecole Nationale Superieure De Chimie De Montpellier

Solvay

Université De Montpellier 2

Patrick Lacroix-Desmazes

Bernard Boutevin

Vincent Bodart

Romain Severac

Vincent Kurowski

Yves Vanderveken

Christophe Fringant

Bruno Fournel

Pierre-Emmanuel Dufils

Jérôme Vinas

Yves Hervaud

Alex Van Herk

Jérôme Blancher

Sophie Dussolliet

Serge Lagerge

Frédéric Barth

Julien Galy

Jérôme Garnier

Berengere Rixens

Jeff Tonnar

Jérôme Warnant

Bérengère Rixens

Process for the preparation of a vinylidene chloride polymer composite comprising a solid particulate encapsulated in the vinylidene chloride polymer. The process comprises providing a dispersion of a solid particulate material in a liquid phase, said dispersion comprising a RAFT/MADIX agent; providing vinylidene chloride and optionally one or more ethylenically unsaturated monomer copolymerizable therewith to said dispersion; and polymerizing vinylidene chloride and said optionally present one or more ethylenically unsaturated monomer under the control of said RAFT/MADIX agent to form polymer at the surface of said solid particulate material.

Process for the preparation of a vinylidene chloride polymer composite

Process of controlled free-radical polymerization in aqueous dispersion for the preparation of a block copolymer at least one block of which is a block of a halogenated polymer using molecular iodine and at least one oxidant whose solubility in water is at least 10 g/l for the synthesis of the first block of the block copolymer.

Free-radical polymerization process in aqueous dispersion for the preparation of a block copolymer at least one block of which is a block of a halogenated polymer

Polymer composition comprising: 1) a polymer (P1) comprising at least 50% by weight of monomeric units derived from an ethylenically unsaturated monomer (M1), and 2) at least one co-oligomer (O1) comprising at least: a) a component (A) comprising at least one monomeric unit identical to that derived from the monomer (M1) on which the polymer (P1) is based, and b) a component (B) comprising at least one monomeric unit (m2), derived from an ethylenically unsaturated monomer, carrying at least one group chosen from the following groups: &#x2014;CHwith a between 6 and 30; &#x2014;(CH)&#x2014;CFwith b between 1 and 11 and c greater than or equal to 5; &#x2014;(CH)&#x2014;(Si(CH)&#x2014;O)&#x2014;Si(CH)with d between 1 and 11 and e between 1 and 1000; &#x2014;COOH; &#x2014;SOH, and the phosphonate groups &#x2014;PO(OH)(OR) with Rbeing a hydrogen atom or an alkyl radical containing from 1 to 11 carbon atoms.

Polymer composition

Process for preparing one or more iodinated organic substances having a molecular mass of less than 2000 (substances (S)) using (A) at least one free-radical-generating substance chosen from peroxides, diazo compounds, dialkyldiphenylalkanes, substances derived from tetraphenylethane, boranes and iniferter substances comprising at least one thiuram disulphide group, (B) an ethylenically unsaturated substance capable of adding a free radical to its ethylenic double bond, (C) molecular iodine, which comprises the steps according to which at least a fraction of (A), at least a fraction of (B) and at least a fraction of (C) are introduced into a reactor, and then the contents of the reactor are caused to react, while introducing therein the possible remainder of (A), the possible remainder of (B) and the possible remainder of (C), until a moment is reached when the content of the reactor is a mixture comprising one or more substances (S). Iodinated organic substances for whose preparation the abovementioned process is particularly well suited.

Iodinated organic substances of low molecular mass and process for preparing them

Process for decontaminating, cleaning a solid organic substrate contaminated by solid radioactive particulate inorganic contaminants, in which:

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Radical polymerization process for the preparation of halogenated polymers employing one or more ethylenically unsaturated monomers, at least one of which is chosen from halogenated monomers, molecular iodine and one or more radical-generating agents chosen from diazo compounds, peroxides and dialkyl diphenylalkanes Radical polymerization process for the preparation, starting from the halogenated polymers prepared by the process as described above, of block copolymers, at least one block of which is a halogenated polymer block. Halogenated polymers which have a number-average molecular mass Mn of greater than 1.0&#xd7;10and an Mz/Mw ratio of less than 1.65. Block copolymers, at least one block of which is a block of halogenated polymer identical to the halogenated polymers described above. Block copolymers comprising at least one halogenated polymer block which have a number-average molecular mass Mn of greater than 1.5&#xd7;10and a polydispersity index Mw/Mn of less than 1.60.

Radical polymerization processes for preparing halogenated polymers, and halogenated polymers

Radical polymerization process for the preparation of halogenated polymers and block copolymers. Halogenated polymers and block copolymers.

Radical polymerization methods and halogenated polymers

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Montpellier, France

Patrick Lacroix-Desmazes