Totalenergies Onetech

Université Jean Monnet Saint-Étienne

Université Claude Bernard Lyon 1 (Ucbl)

Centre National De La Recherche Scientifique-Cnrs

Institut National Dessciences Appliquées De Lyon(insa Lyon)

Centre National De La Recherche Scientifique

Institut National Des Sciences Appliquees De Lyon

Universite Claude Bernard – Lyon1

Pascal Navez

Philippe Cassagnau

Yves Trolez

Karim Delage

Olivier Lhost

Mohammad Abou-taha

Emmanuel Beyou

Process for treatment of an initial polyethylene-containing material to produce a polyethylene composition comprising providing a twin-screw extruder with thermal regulation devices; providing an initial polyethylene-containing material comprising at least 50 wt. % of polyethylene based on the total weight of the initial polyethylene-containing material; extruding the initial polyethylene-containing material to obtain a polyethylene composition; wherein extrusion is performed with a residence time of less than 20 min; and recovering a polyethylene composition; wherein extruding comprises a thermal treatment of the initial polyethylene-containing material at a temperature of at least 300° C. in one or more hot zones of the extruder by self-heating to have a maximum barrel temperature ranging from 300 to 460° C. in at least one hot zone of the extruder.

Process for treatment of an initial polyethylene-containing material to produce a polyethylene composition for injection molding

Process of grafting of a polyethylene-containing material to produce a modified polyethylene composition comprising providing a twin screw extruder with one or more thermal regulation devices; a polyethylene-containing material and a grafting agent and extruding the polyethylene-containing material and the grafting agent to obtain a modified polyethylene composition; the step of extruding comprises a thermal treatment of the polyethylene-containing material by self-heating of the material at a maximum barrel temperature Ts ranging from 315° C. to 410° C. in one or more hot zones of the extruder.

Process for the production of grafted polyethylene and grafted polyethylene

Polyethylene composition comprising at least 50 wt. % of polyethylene based on the total weight of the polyethylene composition, and having a density of at least 0.910 g/cm; a melt index MIranging from 3.0 to 60.0 g/10 min; an unsaturation index higher than 2,000 wherein the unsaturation index is the product of the Mn in Dalton and the vinyl unsaturation units per 1,000 carbon atoms as determined by ASTM D6248-98:2004; a complex viscosity at 0.1 rad/sec at 190° C. ranging from 200 to 20,000 Pa·s; and a ratio of complex viscosity at a frequency of 0.01 rad/sec to the complex viscosity at a frequency of 100 rad/sec of at most 8.0, said ratio being measured at 190° C.

Polyethylene composition for injection molding

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Seneffe, Belgium

Pascal Navez