Atofina

Elf Atochem S.a.

Arkema Inc.

Arkema France

Patrice Robert

Jean-Laurent Pradel

Christophe Le Roy

Jean-Michel Pierrot

Denis Bertin

Martin Baumert

Marius Hert

Jerome Pascal

Damien Rauline

Fabrice Chopinez

Francois Court

Denis Germain

Philippe Annoot

Jérome Pascal

François Court

Thomas Abend

Laurent Breysse

Fabrice 40 Bis Rue De Pannette Chopinez

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 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 invention concerns a mixture comprising by weight, the total being 100%, 1 to 100% if a polyamide block copolymer consisting of a basic polyolefin chain and on an average at least a polyamide graft wherein: the grafts are fixed to the basic chain by the radicals of an unsaturated monomer (X) having a function capable of reacting with a polyamide with amine terminal, the radicals of the unsaturated monomer (X) are fixed to the basic chain by grafting or copolymerization from its double bond; 99 to 0% of a flexible polyolefin with elastic modulus in flexure less than 50 MPa at 23&#xb0; C. and having a crystalline melting point ranging between 60&#xb0; C. and 100&#xb0; C. Said mixtures are useful for making films, tanks, geomembrane protective fabrics produced by extrusion, products obtained by calendering, thermocladding/forming, protective films for electric cables and skins using slush molding technique.

Mixture of grafted polyamide-block and flexible polyolefin copolymers

The invention concerns a crosslinkable composition of functionalized polyolefin powder comprising a functionalized polyolefin (A) having an MFI of at least 20 (190&deg; C. 2.16 kg), a product (B) having a function for crosslinking (A), the composition having a grain size distribution between 100 and 400 &mgr;m. Said composition is useful for slush moulding, for thermoforming sheets or injection on an insert.

Crosslinkable compositions of functionalized polyolefin powders

The invention concerns a film comprising ethylene copolymers and an unsaturated epoxide and comprising quinones grafted on said copolymers. The invention also concerns a structure comprising at least an oxygen-barrier film and at least said oxygen-absorber film. The invention further concerns a packaging element comprising said structure wherein, starting from inside and moving outwards, there is first the oxygen-absorber-film followed by the barrier film.

Polyolefin films containing grafted quinones and structures comprising same

A thermosetting composition consists essentially of a mixture of (A) a polymer containing acid anhydride groups, (B) a molecular sieve being partially loaded with at least one amine, and (C) a filler capable of releasing water upon heating at a temperature above the processing temperature of the mixture of (A), (B) and (C). The processing temperature is chosen so as to be below the desorption temperature of the amine from the molecular sieve. The composition is particularly useful in making hot melt adhesives and sheetings of electric cables.

Thermosetting compositions based on polymers containing acid anhydride groups

This process for the production of a controlled-rheology resin of a propylene homopolymer or copolymer or a composition that comprises a propylene homopolymer or copolymer in the absence of a functional monomer, whereby said process brings about an increase of the fluidity index of the resin by cuts of the chains, is characterized by the fact that at least one stable free radical is incorporated into said resin in the viscous state, since a solid product that has an increased fluidity index is formed. In particular, the stable free radical or radicals is or are selected from among nitroxyl radicals, comprising at least one &boxH;N&mdash;O&prime; group.

Method for the production of a controlled rheological polypropylene resin

Coextrusion binder based on cografted metallocene polyethylene

Coextrusion binder based on a mixture of cografted polyolefins

Composition based on an ethylene-vinyl alcohol copolymer and its use

Multilayer structure comprising a binder and a layer of polyketone

The present invention relates to a process for the preparation of graft thermoplastic polymers in which at least one thermoplastic polymer (A) is grafted with a functional monomer in the presence of a substance which inhibits or reduces the crosslinking or the depolymerization of (A). This substance may be a stable nitroxide radical. Graft polymers are useful as compatibilizing agents in mixtures of polymers and as coextrusion binders. The invention also relates to multilayer structures including these binders.

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Serquigny, France

Patrice Robert