Atofina

Elf Atochem S.a.

Atofina S.a.

Arkema Inc.

Elf Antar France

Total Raffinage Marketing

Thierry Senninger

Michael Buback

Eric Minaux

Philippe Teyssie

Philippe Dubois

Robert Jerome

Paul Tordo

Elisabetta Damiani

Lucedio Greci

Patricia Carloni

Giampaolo Tommasi

Pierluigi Stipa

Olivier Guerret

Paul Maldonado

Jean-Luc Couturier

Jean-Pascal Planche

Yves Gnanou

Annie Zins

Muriel Plechot

Sophie Robin

Jean-Baptiste Verlhac

Philippe Lecomte

Jean-Marc Le Blevec

Bernard Neff

Stephane Drouilhet

Dominique Lastecoueres

Vincent Darcos

Laurent Sanchez

Georges Moineau

The invention relates to a process for trapping a free monomer which has not reacted by copolymerization or by grafting comprising at least one epoxide functional group in a thermoplastic composition based on ethylene and/or on propylene and based on at least one monomer comprising at least one epoxide functional group, the said process comprising the following stages: preparation of the said thermoplastic composition, addition of a sufficient amount of a solid trapping additive exhibiting, at its surface, sites with a basic nature within the Lewis or Br&#xf6;nsted meaning. The trapping additive is a porous zeolite, the diameter of the pores of which is between 5 and 15 angstr&#xf6;ms, preferably between 6 and 13 angstr&#xf6;ms. The invention also relates to the composition obtained by such a process and to the blends comprising such a composition.

Process for trapping residual monomer with an epoxide functional group in a thermoplastic composition

For trapping a residual monomer containing an expoxide function that has not reacted by copolymerization or by grafting, in a thermoplastic composition based on a copolymer of ethylene and/or propylene, a sufficient amount of an acidic trapping additive is added to remove the residual monomer. The trapping additive is preferably a porous zeolite with a pore diameter of between 2 and 10 angstroms. Improved compositions and blends are thereby obtained.

Method for trapping a residual monomer with epoxide function in a thermoplastic composition

The invention relates to a process for trapping a free monomer which has not reacted by copolymerization or by grafting comprising at least one epoxide functional group in a thermoplastic composition based on ethylene and/or on propylene and based on at least one monomer comprising at least one epoxide functional group. The process can comprise the following stages: (i) preparation of the thermoplastic composition; and (ii) addition of a sufficient amount of a solid trapping additive exhibiting, at its surface, sites with a basic nature within the Lewis or Br&#xf6;nstead meaning. The trapping additive comprises a porous zeolite, the diameter of the pores of which is between 5 and 15 angstr&#xf6;ms, preferably between 6 and 13 angstr&#xf6;ms. The invention also relates to the composition obtained by such a process and to the blends comprising such a composition.

Method for controlled free radical polymerization or copolymerization of ethylene under high pressure in the presence of an initiator-controller

The invention relates to a continuous process for the manufacture of PVDF homopolymer or copolymer. The optional comonomer comprises a vinyl group polymerized by free radicals, and comprises at least one fluorine atom, a fluoroalkyl group or a fluoroalkoxy group, directly attached to this vinyl group. The invention also relates to PVDF homopolymers made by processes of the invention. The invention further relates to a process for deoxygenating a flow.

Process for the high-pressure polymerization of 1, 1-difluoroethylene

Process for the controlled radical polymerization or copolymerization of ethylene under high pressure in the presence of initiating free radicals and of controlling indoline nitroxide radicals

The invention relates to a process for the radical polymerization of at least one monomer in the presence of at least two stable free radicals of different natures. The use of two different stable free radicals is reflected by a higher productivity than that which would be expected on calculating the arithmetic mean of the productivities obtained with each of the stable free radicals when they are used individually.

Radical polymerization in the presence of several stable free radicals

The invention relates to a process for preparing alkoxyamines. This process consists in mixing, in an organic solvent, a metal salt, a ligand for the metal, a halocarbon compound ZX and a nitroxide, in keeping the reaction medium stirring at a temperature of between 20&deg; C. and 90&deg; C. until the nitroxide has disappeared, in recovering the organic phase, in washing it with water and then in isolating the alkoxyamine by evaporating the organic solvent under reduced pressure.

Method for preparing alkoxyamines from nitroxides

The invention provides a method comprising contacting, between 100&deg; C. and 230&deg; C. and under agitation, an elastomer, a functionalising agent and optionally, a peroxide compound. The functionalising agent is a thiolcarboxylic acid polyester or a reaction product of a thiolcarboxylic acid or ester with ethylene sulphide. The functionalised elastomer can also be pre-formed, then incorporated into the bitumen. The resulting compositions are usable directly or after dilution, for forming bituminous binders to produce surfacing, coating and waterproofing materials.

Process for the preparation of functionalized elastomer/bitumen compositions and their use in coatings

This process is characterized in that at least one of the said monomers is polymerized or copolymerized in bulk, solution, emulsion or suspension at a temperature which may be as low as 0.degree. C., in the presence of an initiator system comprising at least one radical-generator compound other than an arenesulphonyl chloride; and at least one catalyst consisting of a metal complex represented by the following formula (I): Ma.sub.a (L).sub.n in which: M represents Ni, Pd or Pt; A represents a halogen or a pseudohalide; the groups L are ligands of the metal M, which are chosen independently from those containing at least one from among N, P, As, Sb, and Bi, it being possible for at least two of these ligands to be connected together by one or more divalent radicals; a is an integer from 1 to 5; n is an integer from 1 to 4; with 4.ltoreq.a+n.ltoreq.6, a+n representing the coordination number of the complex.

Process for the controlled radical polymerization or copolymerization of

At least one of the monomers is polymerized or copolymerized in bulk, solution, emulsion or suspension, at a temperature which may be as low as 0.degree. C., in the presence of at least one radical-generator compound and at least one metal complex catalyst of formula Ma.sub.a (L).sub.n (M=Cu, Ag or Au; A=Hal, pseudohalogen or carboxylate; L=ligands of M chosen from those of formula ##STR1## R.sup.1, R.sup.2, R.sup.3, R.sup.4, R.sup.5 and R.sup.6 =H, C.sub.1 -C.sub.10 alkyl, aromatic or heteroaromatic; Z.sup.1, Z.sup.2 and Z.sup.3 =one of the following: ##STR2## (R.sup.7 to R.sup.18 =H, C.sub.1 -C.sub.10 alkyl, aromatic or heteroaromatic; R.sup.19 and R.sup.20 =H, Hal, C.sub.1 -C.sub.10 alkyl, C.sub.1 -C.sub.10 alkoxy or --(CR.sup.21 R.sup.22)rNR.sup.23 R.sup.24, where R.sup.21, R.sup.22, R.sup.23 and R.sup.24 =H,C.sub.1 -C.sub.10 alkyl, aromatic or heteroaromatic, and r=integer from 1 to 10; it being possible also for not more than two from among Z.sup.1, Z.sup.2 and Z.sup.3 each to represent H; o, p and q=integer from 1 to 10 and may also be 0 except if the associated residue Z.sup.1, Z.sup.2 or Z.sup.3, respectively, is --NR.sup.19 R.sup.20 ; a=1 or 2; n=1, 2 or 3.

This process is characterized in that at least one of the said monomers is polymerized or copolymerized in bulk, solution, emulsion or suspension, at a temperature which may be as low as 0.degree. C., in the presence of an initiator system comprising at least one non-peroxy radical-generator compound and at least one catalyst consisting of a metal complex represented by formula Ma.sub.a (L).sub.n in which M represents Rh, Co or Ir; A represents, a halogen or a pseudohalogen; the groups L, which may be identical or different, each represent a ligand which may be a chiral ligand, which is chosen from cyclooctadiene, PRR'R', P(OR) (OR') (OR'), NRR'R', ORR', SRR', SeRR', AsRR'R', SbRR'R', each radical R, R' and R' independently representing an optionally substituted C.sub.1 -C.sub.14 alkyl group or an optionally substituted aromatic group, it being possible for at least two of these ligands to be joined together by one or more divalent radicals; a is an integer such that 1.ltoreq.a.ltoreq.3 ; n is an integer such that 1.ltoreq.n.ltoreq.5, and in the absence of activator.

Process for the controlled radical (CO) polymerization of (Meth) acrylic

This process is characterized by the fact that at least one of the said monomers is polymerized or copolymerized in bulk, solution, emulsion or suspension, at a temperature that can be as low as 0.degree. C., in the presence of an initiation system including: at least one compound generating radicals, other than bromofluorene, and at least one catalyst consisting of a complex of palladium in the 0 oxidation state, denoted by the following formula (I): Pd(0)L.sup.1 L.sup.2 L.sup.3 L.sup.4 in which each of L.sup.1, L.sup.2, L.sup.3 and L.sup.4, which are identical or different, denotes a ligand which may be a chiral ligand, which is chosen from PRR'R', P(OR)(OR')(OR'), NRR'R', ORR', SRR', SeRR', AsRR'R', SbRR'R', where each of R, R' and R' independently denotes a C.sub.1 -C.sub.14 alkyl group, optionally substituted, or an optionally substituted aromatic group, it being possible for at least two of these ligands to be joined to one another by one or more divalent radicals.

Process for controlled radical polymerization or copolymerization of

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Thierry Senninger