Arkema France

Sk Global Chemical Co., Ltd.

Arkema Inc.

Fabrice Chopinez

Jean-Luc Dubois

Damien Rauline

Anthony Bonnet

Arnaud Gerbaulet

Guillaume Le

Michael Werth

Jean-Laurent Pradel

Karine Triballier

Samuel Devisme

Patrice Robert

Jerome Pascal

Barbara Ramfel

Johann Laffargue

Thierry Pascal

Jerome Chauveau

Thomas Roussel

Michaela Steng

Jeau-Laurent Pradel

Pascal Sebire

Jérôme Pascal

The invention concerns an adhesive composition consisting of at least one ethylene polymer or copolymer, said composition comprising at least one unsaturated carboxylic acid ester comonomer, and at least one functional comonomer, useful in an extrusion-coating process for application on a support or in an extrusion-lamination process for bonding together several supports of different type or not, in a wide temperature range. The invention is characterized in that said composition has an unsaturated carboxylic acid ester content higher than 5 wt % and in that the functional comonomer consists of at least one reactive function in the form of an acid group, anhydride or epoxy, whereof the proportion is less than 1 wt % of the composition. Said composition has advantageous uses, in particular for bonding together substrates selected among aluminum, paper or cardboard, cellophane, films based of polyethylene, polypropylene, polyamide, polyester, polyvinyl chloride (PVC), polyvinylidene chloride (PVDC), polyacrylonitrile (PAN) resins, oriented or not, metal-coated or not, physically or chemically treated or not and films coated with a thin inorganic barrier layer, such as polyester (PET, SiOx or AlOx).

Adhesive composition based on ethylene copolymers, useful for extrusion-coating and extrusion-lamination on a variety of supports

The invention relates to coextrusion binders including renewable and/or biodegradable polymers having good adhesion properties: at least one renewable and/or biodegradable polymer (A) grafted with a functional monomer including at least one reactive function, the grafting ratio being &#x3c;1% in weight of the grafted polymer (A); at least one non-grafted renewable and/or biodegradable polymer (B) identical to (A) or compatible with (A) optionally a softener (C); and optionally a starch-based material (D). The invention also relates to multilayered structures including the binder of the present invention, in which the layers are preferably made of renewable and/or biodegradable compounds. The multilayered structures are advantageously useful in the field of food packaging.

Coextrusion binders on a renewable/biodegradable basis

The present invention relates to a method for radiation grafting a compound by irradiation, that can be grafted onto a fluoropolymer, so as to prevent destabilization of the fluorinated polymer. Said method comprises the following steps: a) the fluoropolymer is mixed in the melted state thereof with a graftable compound; b) the mixture obtained in a) is converted into films, plates, granulates or powder; c) the products from step b) are subjected to photonic (&#x3b3;) or electronic (&#x3b2;) irradiation in a dose of between 0.5 and 15 Mrad; and d) optionally, the products from step c) are washed and/or a degassed. According to said method, a stabilizing agent is added to the fluorinated polymer. Said stabilizing agent can be an antioxidant, a graftable metal salt, or a combination of the two. The invention also relates to structures comprising at least one layer of said mixtures and at least one layer of another material, and to the use of said structures to obtain a barrier effect. Said structures act as a barrier to a plurality of fluids, especially to petrol and to air-conditioning fluids, and can take the form of bottles, tanks, containers, pipes, and all kinds of recipients. They can also be transformed into films used to produce packaging.

Method for grafting a fluorinated polymer and multilayer structures comprising said grafted fluoropolymer

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 process for grafting an unsaturated monomer onto a fluoropolymer, having the steps of: Structures made with these materials are barriers to many fluids and in particular to petrol and to air-conditioning fluids and may be formed into bottles, tanks, containers, pipes, hoses and vessels of all sorts. They may also be converted into films with which packaging is made.

Process for grafting a fluoropolymer and multilayer structures comprising this grafted polymer

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Evreux, France

Fabrice Chopinez