Solvay Polyolefins Europe-Belgium

Solvay (Societe Anonyme)

Solvay Sa

Total Petrochemicals Research Feluy

Solvay Polyolefins Europe-Belgium (Societe Anonyme)

Solvay & Cie (Societe Anonyme)

Atofina Research S.a.

Solvay Polyolefins Europe-Belgium S.a.

Solvay Polyolefins Europe - Belgium (Societete Anonyme)

Bp Belgium

Jean-Louis Costa

Sabine Pamart

Serge Bettonville

Philippe Francois

Vincent Laurent

Dirk Vercammen

Jacques Michel

Olivier Miserque

Marc Dupire

Vincent Wilmet

Eric Damme

Luc Lerot

Fabian Siberdt

Joseph Pirotton

Gaetane Hallot

Raymond Mikielski

Herve Collette

Virgile Rouyer

Virgil Rouyer

Fabian Sibendt

A polyethylene resin comprising from 35 to 49 wt. % of a first polyethylene fraction of high molecular weight and from 51 to 65 wt. % of a second polyethylene fraction of low molecular weight, the first polyethylene having a density of up to 0.930 g/cm, and an HLMI of less than 0.6 g/10 min and the second polyethylene fraction comprising a high density polyethylene having a density of at least 0.969 g/cmand an MIof greater than 10 g/10 min, and the polyethylene resin, having a density of greater than 0.946 g/cm, an HLMI of from 1 to 100 g/10 min, a dynamical viscosity, measured at 0.01 radians/second, greater than 200,000 Pa&#xb7;s and a ratio of the dynamical viscosities measured at, respectively 0.01 and 1 radians/second greater than 8.

Process for producing polyethylene pipe resins

A polyethylene resin comprising a blend of from 35 to 49 wt % of a first polyethylene fraction of high molecular weight and 51 to 65 wt % of a second polyethylene fraction of low molecular weight, the first polyethylene fraction comprising a linear low density polyethylene having a density of up to 0.928 g/cm, and an HLMI of less than 0.6 g/10 min and the second polyethylene fraction comprising a high density polyethylene having a density of at least 0.969 g/cm, and an MIof greater than 100 g/10 min, and the polyethylene resin, having a density of greater than 0.951 g/cmand an HLMI of from 1 to 100 g/10 min.

Polyethylene pipe resins and production thereof

A polyethylene resin comprising from 35 to 49 wt. % of a first polyethylene fraction of high molecular weight and from 51 to 65 wt. % of a second polyethylene fraction of low molecular weight, the first polyethylene having a density of up to 0.930 g/cm, and an HLMI of less than 0.6 g/10 min and the second polyethylene fraction comprising a high density polyethylene having a density of at least 0.969 g/cmand an MIof greater than 10 g/10 min, and the polyethylene resin, having a density of great 0.946 g/cm, an HLMI of from 1 to 100 g/10 min, a dynamical viscosity, measured at 0.01 radians/second, greater than 200,000 Pa.s and a ratio of the dynamical viscosities measured at, respectively 0.01 and 1 radians/second greater than 8.

Flexible compositions based on propylene polymers

Catalyst support containing an &agr;-olefin polymer which is in the form of particles of mean size from 5 to 350 &mgr;m in which the pore volume generated by the pores of radius from 1,000 to 75,000 &angst; is at least 0.2 cm /g. Catalyst usable for the polymerization of &agr;-olefins, including a compound containing at least one transition metal belonging to groups IIIb, IVb, IVb and VIb of the Periodic Table, bound in or on this support.

Catalyst support and catalyst for the polymerization of &agr;-olefins

The invention comprises a catalyst support containing an &agr;-olefin polymer which is in the form of particles of mean size from 5 to 350 &mgr;m in which the pore volume generated by the pores of radius from 1,000 to 75,000 &angst; is at least 0.2 cm,/g. A catalyst usable for the polymerization of &agr;-olefins, including a compound containing at least one transition metal belonging to groups IIIb, IVb, IVb and VIb of the Periodic Table, bound in or on this support, is also described.

Catalytic system which can be used for the polymerisation of .alpha.-olefins comprising:

Catalytic system which can be used for the stereospecific polymerisation

Catalytic system which can be used for the polymerization of .alpha.-olefins comprising:

Catalytic system which can be used for the stereospecific polymerization

Catalyst systems comprising, on the one hand, a catalytic solid based on complexed titanium trichloride and, on the other hand, a nonhalogenated organoaluminium activator. When employed in gas phase olefin polymerisation processes, these catalyst systems make it possible to manufacture a wide range of homopolymers and copolymers (random and block) with an isotacticity index which can be adjusted to very low values and with excellent pourability, even in the case of copolymers of high comonomer content. In the absence of transfer agents they also make it possible to synthesize polymers of very high molecular masses, with an increased activity. These polymerization processes yield particularly advantageous results in the case of propylene.

Block copolymer of propylene and ethylene

Catalyst systems comprising, on the one hand, a catalytic solid based on complexed titanium trichloride and, on the other hand, a nonhalogenated organolauminium activator. When employed in gas phase olefin polymerization processes, these catalyst systems make it possible to manufacture a wide range of homopolymers and copolymers (random and block) with an isotacticity index which can be adjusted to very low values and with excellent pourability, even in the case of copolymers of high comonomer content. In the absence of transfer agents they also make it possible to synthesise polymers of very high molecular masses, with an increased activity. These polymerization processes yield particularly advantageous results in the case of propylene.

Catalyst system for the polymerization of olefins; process for this

Catalyst systems comprising, on the one hand, a catalytic solid based on complexed titanium trichloride and, on the other hand, a nonhalogenated organoaluminium activator. When employed in gas phase olefin polymerization processes, these catalyst systems make it possible to manufacture a wide range of homopolymers and copolymers (random and block) with an isotacticity index which can be adjusted to very low values and with excellent pourability, even in the case of copolymers of high comonomer content. In the absence of transfer agents they also make it possible to synthesize polymers of very high molecular masses, with an increased activity. These polymerization processes yield particularly advantageous results in the case of propylene.

Catalyst system for the polymerization of olefins, process for this

Catalyst support containing an .alpha.-olefin polymer which is in the form of particles of mean size from 5 to 350 .mu.m in which the pore volume generated by the pores of radius from 1,000 to 75,000 .ANG. is at least 0.2 cm.sup.3 /g. Catalyst usable for the polymerization of .alpha.-olefins, including a compound containing at least one transition metal belonging to groups IIIb, IVb, IVb and VIb of the Periodic Table, bound in or on this support.

Catalyst support and catalyst for the polymerization of .alpha.-olefins;

Catalytic solids based on titanium trichloride complex, usable for the stereospecific polymerisation of alpha-olefins, obtained by heat treatment, in the presence of a halogenated activating agent, of the liquid material resulting from bringing TiCl.sub.4, pretreated with an electron-donor compound, into contact with a composition (C) corresponding to the general formula

Catalytic solid usable for the stereospecific polymerisation of

Catalyst support and catalyst for the polymerization of alpha-olefins;

The invention relates to catalytic compositions for the hydrogenation of chlorofluoroalkenes to fluoroalkenes, comprising a porous carrier impregnated with a metal of group VIII of the Periodic Table of the elements and with one or more compounds chosen from the salts of an alkali metal or alkaline-earth metal. The invention also relates to a process for obtaining these catalytic compositions and a process of hydrogenation by means of these catalytic compositions.

Growing community of inventors

Grimbergen, Belgium

Jean-Louis Costa