Societe Nationale Elf Aquitaine

Elf Atochem S.a.

Elf Atochem North America, Inc.

Arkema Inc.

M&t Chemicals, Inc.

Atotech Deutschland Gmbh

Atofina

Trinseo Europe Gmbh

At Fina

Cray Valley Sa

Gilles Meunier

Chris Bertelo

Xavier Francois Drujon

Lino Vio

Ludwik Leibler

Bruno Vuillemin

Fabrice Domingues Dos Santos

Francis Verzaro

Pascale Dargelos

Paul Kunesch

Denis Lopez

Pascale Fabre

Pierre Gerard

Paul Maldonado

Rosangela Pirri

Heinrich Meyer

Bernard Damin

Philippe Heim

Christophe Lacroix

Sylvain Bourrigaud

Malcolm Robert Mackley

Patrice Gaillard

Luc E Navascues

Daniel Callin

Rene L Brouard

Sylvain D Queruel

Jean-Marc Boumera

André Lermite

Sylvain Queruel

Gonzalo Urrutia Desmasion

Sylvain C Lamarre

Laurent Gervat

Jerome Laffont

Sylvain Lamarre

Xavier Drujon

The present invention relates to a polymeric composition comprising a polymer comprising monomers of methyl methacrylate and methacrylic acid. In particular the present invention relates to a process for making a polymeric composition suitable for moulded objects, said polymeric composition is comprising monomers of methyl methacrylate and methacrylic acid. The present invention concerns also process for making a moulded object comprising a polymer comprising monomers of methyl methacrylate and methacrylic acid. The present invention concerns also moulded object comprising a polymer comprising monomers of methyl methacrylate and methacrylic acid.

Method of preparation of a composition comprising a copolymer of methyl methacrylate and methacrylic acid

The invention relates to an impact additive of the core/shell type for thermoplastic polymers. This impact additive comprises a crosslinked elastomeric core based on n-alkyl acrylate and a shell made of poly(alkyl methacrylate) grafted onto said core.

Impact additive of the core/shell type for thermoplastic polymers

The impact-resistant thermoplastic compositions comprising (A) a rigid thermoplastic methacrylic polymer or copolymer matrix P containing mostly methyl methacrylate units, (B) at least one impact-modifying additive and (C) at least one elastomer copolymer which contains grafting sites, at least on pendant chains, and is obtained from at least one vinylaromatic monomer (C) and from at one monomer chosen from the monomers (C): C-Clinear or branched alkyl acrylates, C-Calkoxyalkyl acrylates and aralkyl acrylates, dienes (C) and ethylenically unsaturated monomers (C) having one or more pendant initiating functional groups, the said copolymer (C) being grafted by thermoplastic polymer groups P and being dispersed in the matrix (A) in the form of nodules, which can be called 'particles', from 10 nm to 500 nm in size and able to have a droplet, capsule-type monoinclusion and/or salami-type multi-inclusion morphology.

Impact-resistant composition based on thermoplastic methacrylic (co)polymer

A latex which forms a film by evaporation at a temperature of less than 40&deg; C. is based on hydrophobic polymer particles having a core/shell structure. The particles consist of 70 to 90% by weight of at least one polymer with a soft character having a glass transition temperature of less than 20&deg; C. forming the core, and 10 to 30% by weight of at least one polymer with a hard character having a glass transition temperature of greater than 50&deg; C. forming the shell. When applied to any surface and after drying at low temperature, the latex, without the use of any coalescents or volatile organic compounds, provides a continuous film which is homogeneous, has no surface tack and has good mechanical integrity.

Low-temperature film-forming latex based on hydrophobic polymers having a core/shell structure without coalescents

Composite materials containing an impact-resistant film

The invention concerns hydrophobic films for coating surfaces obtained by drying at low temperature, not requiring coalescent agents, latex containing a core-structured polymer with soft characteristic having a glass transition temperature lower than 20&deg; C. enclosed in a shell with hard characteristic having a glass transition temperature higher than 50&deg; C.

Latex based on hydrophobic polymers core/shell structures film forming at low temperature without coalescent agent

Antistatic acrylic polymer compositions

The invention relates to photosensitive compositions, which can be developed positively. Traditional compositions have either inadequate photosensitivity or they are not appropriate for use on the copper surfaces, for example of circuit boards, since the exposed coating sections of the composition cannot be completely removed during developing, which results in problems in subsequent plating or etching. In the photosensitive compositions according to the invention, these disadvantages cannot be observed. Various compositions are described, which contain photo acid generators and a polymer resin with side groups, which can split acid, said polymer resin being formed by polymerizing at least three different acrylate- or methacrylate-monomers.

Photosensitive composition

Method for producing coagulated polymer latex particles

The invention relates to an impact additive of the core/shell type for thermoplastic polymers. This impact additive comprises a crosslinked elastomeric core based on n-alkyl acrylate and a shell made of poly(alkyl methacrylate) grafted onto the said core.

The invention relates to reinforcing compositions for thermoplastic polymers which have improved anticaking and flow properties, which include an impact additive and a precipitated silica. These compositions are very particularly suitable for the reinforcement of PVC.

Reinforcing compositions including a precipitated silica for

The invention relates to reinforcing compositions for thermoplastic polymers which have improved anticaking and flow properties, which include an impact additive and a synergic combination including a micronized silica and at least one calcium salt. These compositions are very particularly suitable for the reinforcement of PVC.

Reinforcing compositions for thermoplastic polymers, including a

Polymer compounds resulting from the condensation of polyacrylic acids having a molecular weight comprised between 10,000 and 2,000,000 and alkylamines containing at least 12 carbon atoms in their chain. These products constitute paraffin deposit inhibitors and pour point depressants for crude petroleum oils.

Novel n-substituted polyamide type polymers, their method of preparation

The present invention provides grafted ethylene copolymers usable more especially as additives for inhibiting the depositions in crude oils. Said copolymer being formed of ethylene and at least one monomer with ethylenic unsaturation, chosen from vinyl esters of C.sub.2 to C.sub.18 monocarboxylic acids, the alkyl esters in the C.sub.1 to C.sub.12 range of unsaturated monocarboxylic acids from the C.sub.3 to C.sub.12 range and the .alpha., .beta.-unsaturated dicarboxylic compounds, on which are fixed the grafts of a homo or copolymer of an .alpha., .beta.-unsaturated monocarboxylic acid ester with at least one alkanol of a chain length equal to or greater than C.sub.12 and at least 20% of which is of a chain length equal to or greater than C.sub.22. Such copolymers may be used more especially as additives for inhibiting the deposition of paraffins and for improving the flow properties of the crude oils.

Grafted ethylene polymers usable more especially as additives for

Stabilization of aqueous solutions of polysaccharides, even in the hot, by the addition of alkali metal dialkyl-dithiocarbamate and sodium chloride or calcium chloride. Applications to drilling fluids and to the improved recovery of crude oil.

Process of thermal stabilization of aqueous solutions of polysaccharides

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Mazerolles, France

Gilles Meunier