Arkema France

Arkema Inc.

Elf Atochem S.a.

Atofina

Atofina S.a.

Jean-Laurent Pradel

Patrice Robert

Guillaume Le

Samuel Devisme

Fabrice Chopinez

Thomas Roussel

Jean-Luc Dubois

Arnaud Gerbaulet

Jean-Jacques Flat

Pierre Nogues

Jerome Pascal

Damien Rauline

Johann Laffargue

Philippe Renouard

Jerome Chauveau

Fabrice R Chopinez

Christophe Loret

Jérome Pascal

Jos&eacute;e Auvray

Fabrice 40 Bis Rue De Pannette Chopinez

The invention relates to a method for production of grafted polyethylene comprising the following steps: a) fermentation of primary renewable material with optional purification to give at least one alcohol chosen from ethanol or a mixture of alcohols comprising ethanol; b) dehydration of the alcohol obtained to give in a first reactor at least one alkene selected from ethylene and mixtures of alkenes containing ethylene and optional purification of the alkene to give ethylene; c) polymerization, in a second reactor, of the ethylene to give polyethylene; d) isolation of the polyethylene obtained in step c); e) grafting the polyethylene with at least one grafting monomer selected from the unsaturated carboxylic acids or theifunctional derivatives thereof, the unsaturated dicarboxylic acids having 4-10 carbon atoms and the functional derivatives thereof being C-Calkyl esters or glycidyl ester derivatives of the unsaturated carboxylic acids and the metal salts of the unsaturated carboxylic acids. The invention further relates to the grafted polyethylene obtained by said method, the copolymers and compositions comprising said polyethylene and the use of said polyethylene.

Production of grafted polyethylene from renewable materials, the obtained polyethylene and uses thereof

The invention relates to a polymer obtained by polymerizing olefins having 6 to 9 carbon atoms and partially derived from renewable resources. In particular, the polymer according to the invention can be derived from vegetable oil or animal fat. The invention also relates to the method for producing the polymer.

Polyolefin derived from renewable resources, and method for producing same

The invention concerns a coextrusion binder comprising a mixture of at least one ethylene homo- or copolymer (A1) of density ranging between 0.940 and 0.980 g/cmwith at least one propylene homo- or copolymer (B), said mixture being grafted by at least one functional monomer and optionally diluted in at least one non-grafted ethylene homo- or copolymer (A2) of density ranging between 0.940 and 0.980 g/cm; the grafting rate of said coextrusion binder being less than 0.5% wt. % based on the total weight of said binder; the density of said tie ranging between 0.940 and 0.980 g/cm. The invention also concerns a structure comprising said type of binder as well as its use.

Coextrusion binder of co-grafted polyethylene and polypropylene diluted in a non-grafted polyethylene

A subject matter of the invention is a coextrusion tie, which comprises:

Coextrusion tie for polyester based on cografted metallocene polyethylene and LLDPE and on metallocene polyethylene

The present invention relates to a composition comprising isotactic polypropylene homo- or copolymer obtained by metallocene catalysis (A), abbreviated to miPP, and isotactic polypropylene homo- or copolymer obtained by Ziegler-Natta catalysis (B), abbreviated to zniPP, and grafted. It also relates to a coextrusion tie comprising such a composition. It also relates to a multilayer structure comprising a layer (L) comprising the preceding tie and, directly attached to this layer:

Composition based on isotactic polypropylene obtained by metallocene catalysis and on grafted isotactic polypropylene obtained by ziegler-natta catalysis

The invention concerns a method for hydrogenation of unsaturated polymers in dispersed medium based on an oxidation-reduction system containing hydrazine, an oxidant such as a peroxide and optionally a carboxylic acid. The hydrogenation rate can reach 100% in certain conditions.

Method for hydrogenation of polymers in dispersed medium

The present invention relates to a coextrusion tie comprising 10 to 35 weight % of a polymer (A) itself composed of a blend of 80 to 20 weight % of a metallocene polyethylene (A1) with a density of between 0.865 and 0.915 and of 20 to 80 weight % of a non-metallocene LLDPE polyethylene (A2), the blend of polymers (A1) and (A2) being cografted by an unsaturated carboxylic acid or its derivative, the content of which in the said blend is between 30 and 100 000 ppm; 40 to 60 weight % of a styrene/butadiene/styrene block copolymer (B) with 50 to 90 mol % of styrene; and 20 to 35 weight % of PE (C); the total making 100%, the blend of (A), (B) and (C) being such that the MFI or melt flow index (ASTM D 1238, 190&#xb0; C., 2.16 kg) is between 0.1 and 10 g/10 min. The present invention also relates to a multilayer structure comprising a layer of tie according to the invention and to the objects comprising such a structure.

Coextrusion tie based on cografted metallacene polyethylene and LLDPE on SBS and on PE

A coextrusion binder and a multilayer structure containing the binding wherein the binder contains a composition comprising (I) syndiotactic polypropylene and (II) at least one polymer being:

Grafted syndiotactic polypropylene and coextruding binders based on syndiotactic polypropylene

The present invention relates to an isotactic polypropylene obtained by metallocene catalysis, onto which is grafted a functional monomer. The invention also relates to a composition which may form part of the composition of a coextrusion binder. This composition according to the invention comprises isotactic polypropylene obtained by metallocene catalysis, grafted and then optionally diluted with at least one polyolefin (C1) and/or in at least one polymer of elastomeric nature (D). The invention also relates to a multilayer structure comprising a layer (L) comprising the above binder, and, directly attached thereto, a layer (E):

Grafted isotactic polypropylene obtained by metallocene catalysis

The present invention relates to a composition comprising isotactic polypropylene homo- or copolymer obtained by metallocene catalysis (A), abbreviated to miPP, and isotactic polypropylene homo- or copolymer obtained by Ziegler-Natta catalysis (B), abbreviated to zniPP, and grafted. It also relates to a coextrusion tie comprising such a composition. It also relates to a multilayer structure comprising a layer (L) comprising the preceding tie and, directly attached to this layer: a nitrogen-comprising or oxygen-comprising polar layer (J), such as a layer of polyamide resin, of saponified ethylene/vinyl acetate copolymer (EVOH) or of polyester; a layer (J) of an inorganic oxide deposited on a polymer, such as polyethylene (PE), poly(ethylene terephthalate) (PET) or EVOH; or a metal or metalloplastic layer (J).

Composition based on isotactic polypropylene obtained by metallocene catalysis and on grafted isotactic polypropylene obtained by Ziegler-Natta catalysis

Polyurethane formulations based on hydroxylated polybutadiene are catalyzed by an N-substituted imidazole derivative. This type of catalysis advantageously replaces the conventional catalysts based on mercury salt. The catalysis does not pose an environmental problem and allows a particular increase in viscosity, permitting an extended pot life and rapid setting.

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Bernay, France

Jean-Laurent Pradel