Total Petrochemicals Research Feluy

Total Research & Technology Feluy

Fina Research, S.a.

Atofina Research S.a.

Solvay Polyolefins Europe-belgium

Totalenergies Onetech Belgium

Atofina Research

Solvay Polyolefins Europe-belgium S.a.

Jacques Michel

Marc Dupire

Guy L Debras

Abbas Razavi

Jean-Louis Costa

Olivier Miserque

Serge Bettonville

Laetitia Urbanczyk

Jean-Claude Deleye

Eric Damme

Philippe Lodefier

Fabian Siberdt

Nicolas Lambricht

Aurélien Vantomme

Martine Slawinski

Olivier Lhost

Philippe J Bodart

Christopher Willocq

Armelle Sigwald

Janos B Nagy

Stephane Nowe

Stéphane Nowe

Pascal Charlier

Michel Cassart

Mieke Dams

Claire Bouvy

Pierre Bernard

Magali Vachaudez

Amelio Iacolina

Prades Floran

Christophe Pirlot

Fabian Sibendt

Virgile Rouyer

Virgil Rouyer

Janos Nagy B

The present invention is related to expandable vinyl aromatic polymers comprising comminuted coke, said comminuted coke having an average stack height (Lc) of carbon crystallites at least 4 nm, a volume median particle diameter (D50) comprised between 1 and less than 5 &#x3bc;m and being characterized by a span (D90&#x2212;D10)/D50 below 2.5 Molded parts produced from the expandable vinyl aromatic polymers prove low thermal conductivities for a low foam density.

Expandable vinyl aromatic polymers

A metallocene-catalyzed polyethylene resin having a multimodal molecular weight and composition distribution, comprising from 45% by weight to 75% by weight of a low density fraction, said fraction having a density below or equal to 918 g/cmas measured following the method of standard test ISO 1183 at a temperature of 23&#xb0; C., wherein the density of the polyethylene resin is from 0.920 to 0.945 g/cm, wherein the M/Mof the polyethylene is of from 2.8 to 6, wherein the melt index MI2 of the polyethylene resin of from 0.1 to 5 g/10 min measured following the method of standard test ISO 1133 Condition D at a temperature of 190&#xb0; C. and under a load of 2.16 kg; and wherein the composition distribution breadth index (CDBI) of the polyethylene resin is below 70%, as analyzed by quench TREF (temperature rising elution fractionation) analysis.

Metallocene-catalyzed polyethylene

The invention relates to a pipe comprising at least one metallocene-catalyzed polyethylene resin, wherein the polyethylene resin has a multimodal molecular weight distribution and comprises at least two metallocene-catalyzed polyethylene fractions A and B, wherein fractions A and B are prepared in different reactors of at least two reactors connected in series, wherein the polyethylene resin comprises: at least 30% by weight and at most 50% by weight of the polyethylene fraction A, based on the total weight of the polyethylene resin, wherein fraction A has a melt index MIof at least 50 g/10 min as determined on the fluff of fraction A according to ISO 1133:1997 condition D at a temperature of 190&#xb0; C. and under a load of 2.16 kg;wherein fraction B has a density of at most 0.9210 g/cm; and wherein the polyethylene resin has a melt index MIof at least 0.10 g/10 min and of at most 1.0 g/10 min as determined according to ISO 1133:1997, condition T, at 190&#xb0; C. and under a load of 5 kg; wherein the polyethylene resin has an HLMI of at least 4.0 g/10 min and at most 14.0 g/10 min, as measured according to the procedure of ISO 1133:1997 condition G with a temperature of 190&#xb0; C. and a load of 21.6 kg; and a density of at least 0.9420 g/cmand of at most 0.9460 g/cmas determined according to the procedure of ASTM D-1505 at a temperature of 23&#xb0; C.

Pipe comprising a metallocene-catalyzed polyethylene resin

Expandable vinyl aromatic polymers may contain comminuted graphite with a polymodal particle size distribution. Foams obtained from such expandable vinyl aromatic polymers have a reduced thermal conductivity at a reduced foam density.

Expandable vinyl aromatic polymers containing graphite particles having a polymodal particle size distribution

Expandable vinyl aromatic polymers may contain comminuted needle petroleum coke with a polymodal particle size distribution. Foams obtained from such expandable vinyl aromatic polymers have a reduced thermal conductivity at a reduced foam density.

Expandable vinyl aromatic polymers comprising platelet needle coke particles

The present invention discloses a homo- or co-polymer of ethylene characterised in that it combines the properties of: It also discloses a method to prepare said polyethylene resin.

Homo- or co-polymers of ethylene with combination of processability and toughness properties

The present invention discloses a process for preparing polyethylene resins in a double loop reactor wherein the catalyst system comprises a bis-tetrahydroindenyl and a bis-indenyl catalyst component deposited on the same support. It also discloses the polyethylene resins obtained by the process and their use to prepare films having a good compromise of haze, processing and mechanical properties.

Process for preparing a polyethylene resin in a double loop reactor with a mixture of bis-indenyl and bis-tetrahydroindenyl

Processes for preparing reinforced polymeric material and the materials formed therefrom are discussed herein. The processes generally include providing a polymeric matrix, providing single-wall carbon nanotubes (SWNT) or multiple-wall carbon nanotubes (MWNT), purifying by the nanotubes in a single step of dissolving a support and catalyst particles with an agent appropriate to the nature of the support to form a purified support, functionalising the purified support by reaction with an alkylamine to form a functionalized support, dispersing the nanotubes in the polymeric matrix by mixing in the molten state to form a mixture and optionally orienting the mixture by stretching.

Conductive polyolefins with good mechanical properties

A process for producing polypropylene having increased melt strength, the process comprising irradiating polypropylene which has been polymerised using a Ziegler-Natta catalyst with an electron beam having an energy of at least 5 MeV and a radiation dose of at least 10 kGray and mechanically processing the irradiated polypropylene to form long chain branches on the polypropylene molecules, whereby the polypropylene has a melt flow index (MFI) of at least 25 dg/min.

Production of polypropylene having improved properties

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 process for producing polypropylene having increased melt strength, the process comprising (i) homopolymerising polypropylene or copolymerising propylene with one or more comonomers selected from ethylene and C4 to C101-olefins to produce a polypropylene homopolymer or copolymer respectively having a double bond concentration of at least 0.1 per 10,000 carbon atoms, (11) irradiating the polypropylene with an electron beam having an energy of at least 5 MeV and at radiation dose of at least 5 kGray, and (iii) melting and mechanically processing the melt of polypropylene to form long chain branches on the polypropylene molecules.

Production of polyolefins having improved properties

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.

A process for producing a propylene copolymer having increased melt strength, the process comprising irradiating a copolymer of propylene and ethylene which has been polymerised using a Ziegler-Natta catalyst with an electron beam having an energy of at least 5 MeV and a radiation dose of at least 10 kGray and melting and mechanically processing the melt of the irradiated ethylene propylene copolymer to form long chain branches on the ethylene propylene copolymer molecules.

Production of propylene copolymers having improved properties

Use of a multimodal polypropylene blend in melt processing wherein for enhancing a compromise between melt strength and drawability the blend has a dispersion index of at least 8 and a ratio Mz/Mn of at least 10.

Growing community of inventors

Feluy, Belgium

Jacques Michel