Abstract: The invention provides a process for the preparation of a multimodal ethylene polymer in a multistage process in the presence of a catalyst comprising a complex of formula (lx) wherein each X is a sigma donor ligand; each Het is independently a monocyclic or multicyclic heteroaromatic or heterocyclic group containing at least one heteroatom selected from O, N or S; L is a carbon, silicon or germanium based divalent bridge in which one or two backbone atoms link the ligands; M is Ti, Zr or Hf; each R1 is the same or different and is a linear CMO alkyl group, or linear CHO alkoxy, each n is 0 to 3; each R2 is the same or different and is a C1-10 alkyl group, C1-10 alkoxy group or —Si(R)3 group; each R is the same or different and is C1-10 alkyl or phenyl group optionally substituted by 1 to 3 C1-6 alkyl groups; and eachp is 0 to 3;

Abstract: The present invention is concerned with a process for polymerizing ethylene or copolymerizing ethylene and at least one alpha-olefin comonomer in the presence of a supported polymerization catalyst in a multi-stage process in which the last polymerization stage is a gas phase reactor, the use of said process for reducing particle carry-over in the last polymerization stage and the use of a supported polymerization catalyst with a certain median particle size to polymerize an ethylene homo- or copolymer in said multi-stage process with a span of its particle size distribution which can be predicted from the median particle size of the catalyst.

Abstract: A process for the preparation of a compound of formula (V): comprising at least the step of reacting a compound of formula (VI) with a compound (VII) wherein; R2 is hydrogen or a C1-C20 hydrocarbyl radical provided that at least one R2 is not hydrogen; R5 is hydrogen or a C1-20 hydrocarbyl group optionally containing one or more heteroatoms from groups 14-16; R6 is hydrogen or a C1-20 hydrocarbyl group optionally containing one or more heteroatoms from groups 14-16; n is 1, 2 or 3; each R8 is a C1-20 hydrocarbyl group; and Hal is a halide; in the presence of a nickel imidazolidin-2-ylidene compound.

Abstract: Method for the manufacture of a temperature sensor with a thermocouple comprising the following successive steps: a) introduction, in a support tube made of a ceramic material, of two thermocouple wires until they extend beyond said support tube; b) welding the ends of said thermocouple wires extending beyond said support tube so as to form a thermocouple hot point; c) introduction, at least partially, of the support tube into a reinforcement tube made of a stainless steel; d) fixing a cap onto said reinforcement tube so as to protect said hot point.

Abstract: Process for the preparation of a solid catalyst system comprising the steps of preparing a liquid clathrate comprising a mixing of an aluminoxane, an aromatic compound and an organo-silicon compound, wherein the mol-ratio between the organo-silicon compound and aluminum of the aluminoxane is below 0.1, mixing said liquid clathrate with an organometallic compound obtaining a liquid mixture, and precipitating the solid catalyst system out of said liquid mixture by adding a saturated aliphatic compound to said mixture liquid.

Abstract: A process for the preparation of a compound of formula (V): comprising at least the step of reacting a compound of formula (VI) ?with a compound (VII) wherein; R2 is hydrogen or a C1-C20 hydrocarbyl radical provided that at least one R2 is not hydrogen; R5 is hydrogen or a C1-20 hydrocarbyl group optionally containing one or more heteroatoms from groups 14-16; R6 is hydrogen or a C1-20 hydrocarbyl group optionally containing one or more heteroatoms from groups 14-16; n is 1, 2 or 3; each R8 is a C1-20 hydrocarbyl group; and Hal is a halide; in the presence of a nickel imidazolidin-2-ylidene compound.

Abstract: A ligand of formula (I?) wherein L is a divalent bridge selected from —R?2C—, —R?2C—CR?2—, —R?2Si—, —R?2Si—SiR?2—, —R?2Ge—, wherein each R? is independently a hydrogen atom, C1-20-hydrocarbyl, tri(C1-20-alkyl)silyl, C6-20-aryl, C7-20-arylalkyl or C7-20-alkylaryl; R2 and R2? are each independently a C1-20 hydrocarbyl radical; R5? is a C1-20 hydrocarbyl group; R6, R6?, R7 and R7? are each independently hydrogen or a C1-20 hydrocarbyl group; Ar and Ar? are independently an aryl or heteroaryl group having up to 20 carbon atoms; each R1 is a C1-20 hydrocarbyl group or two R1 groups on adjacent carbon atoms taken together can form a fused 5 or 6 membered non aromatic ring with the Ar group; and each R4 is a C1-20 hydrocarbyl group; and the dotted lines represent a double bond present in between carbons 1 and 2 or 2 and 3 of the indenyl ring.

Abstract: A catalyst comprising (i) an asymmetric complex of formula (I) wherein M is zirconium or hafnium; each X is a sigma ligand; L is a divalent bridge selected from —R?2C—, —R?2C—CR?2—, —R?2Si—, —R?2Si—SiR?2—, —R?2Ge—, wherein each R? is independently a hydrogen atom, C1-C20-alkyl, tri(C1-C20-alkyl)silyl, C6-C20-aryl, C7-C20-arylalkyl or C7-C20-alkylaryl; R2 and R2? are each independently linear C1-10 hydrocarbyl; R5 and R5? are each independently hydrogen or a C1-20 hydrocarbyl group; R6 and R6? are each independently hydrogen or a C1-20 hydrocarbyl group; R7 is hydrogen or a C1-20 hydrocarbyl group or is ZR3; Z is O or S, preferably O; R3 is a C1-10 hydrocarbyl group; Ar is an aryl or heteroaryl group having up to 20 carbon atoms optionally substituted by one or more groups R8; Ar? is an aryl or heteroaryl group having up to 20 carbon atoms optionally substituted by one or more groups R8?; and R8 and R8? are each independently is a C1-20 hydrocarbyl group; with the proviso that at least one of R6 o

Abstract: A catalyst in solid particulate form free from an external carrier material comprising (I) a complex of formula (I) wherein M is zirconium or hafnium; each X is a sigma ligand; L is a divalent bridge selected from —R?2C—, —R?2C—CR?2—, —R?2Si—, —R?2Si—SiR?2—, —R?2Ge—, wherein each R? is independently a hydrogen atom, C1-C20-alkyl, tri(C1-C20-alkyl)silyl, C6-C20-aryl, C7-C20-arylalkyl or C7-C20-alkylaryl; each R2 is independently hydrogen or a C1-C20 hydrocarbyl radical provided that at least one R2 is not hydrogen; each R5 is independently hydrogen or a C1-20 hydrocarbyl group optionally containing one or more heteroatoms from groups 14-16; each R6 is independently hydrogen or a C1-20 hydrocarbyl group optionally containing one or more heteroatoms from groups 14-16; each n is independently 1, 2 or 3; and each R8 is a C1-20 hydrocarbyl group; and (ii) a cocatalyst comprising a compound of a group 13 metal, e.g. Al or boron.

Abstract: A heterophasic polypropylene resin comprising a polypropylene homopolymer matrix phase (A) and an ethylene-propylene copolymer phase (B) dispersed within the matrix, wherein the xylene soluble fraction of the heterophasic polypropylene resin is in the range 20 to less than 50 wt %; the heterophasic polypropylene resin has an MFR2 of 0.01 to 50 g/10 min; the ethylene content of the xylene soluble fraction of the heterophasic polypropylene resin is in the range of at least 20 wt % to less than 50 wt %; the heterophasic polypropylene resin has a notched charpy impact strength at ?20 C of at least 25 kJ/m2, preferably at least 50 kJ/m2; and wherein the MFR2 (Matrix)/MFR2(XS)?5, preferably ?10.

Abstract: The invention relates to a device (1) for measuring a difference in temperature (T2?T1) upstream and downstream from a member travelled by a fluid, in particular the temperature of a gas upstream and downstream of a particle filter or any other gas-treatment element, said device comprising: a first thermocouple (10) for taking an upstream measurement; a second thermo couple (20) for taking a downstream measurement, the first and second thermocouples being electrically connected head-to-foot in series, at least during an operating phase of the device; a chain (13, 50) for processing the voltage output by the assembly formed by the two thermocouples electrically connected in series, such as to generate a signal (51) which is a function of the temperature difference (T2?T1) measured by the thermocouples.

Abstract: A catalyst comprising (i) a metallocene complex of a group (IV) metal said metallocene comprising at least two cyclopentadienyl type ligands; (ii) a boron cocatalyst; and (iii) an aluminoxane cocatalyst; said catalyst being in solid form, preferably in solid particulate form, and being free from an external carrier.

Abstract: An asymmetric complex of formula (I) wherein M is zirconium or hafnium; each X is a sigma ligand; L is a divalent bridge selected from —R?2C—, —R?2C—CR?2—, —R?2Si—, —R?2Si—SiR?2—, —R?2Ge—, wherein each R? is independently a hydrogen atom, C1-C20-alkyl, tri(C1-C20-alkyl)silyl, C6-C20-aryl, C7-C20-arylalkyl or C7-C20-alkylaryl; R2 and R2? are each independently a C1-C20 hydrocarbyl radical; R5? is a C1-20 hydrocarbyl group; R5 is hydrogen, or a C1-20 hydrocarbyl group; R6 is a non tertiary C1-10 alkyl group or C6-10-aryl group or C7-10 arylalkyl group or ZR3; R6? is a tertiary C4-20 alkyl group; Z is O or S; R3 is a C1-20 hydrocarbyl group optionally substituted with halo; Ar is an aryl or heteroaryl group having up to 20 carbon atoms optionally substituted by one or more groups R1; Ar? is an aryl or heteroaryl group having up to 20 carbon atoms optionally substituted by one or more groups R1; each R1 is a C1-20 hydrocarbyl group or two R1 groups on adjacent carbon atoms taken together can form a fused 5

Abstract: A process for the polymerization of at least one olefin comprising reacting said at least one olefin with a catalyst comprising: (i) a metallocene complex said metallocene comprising at least two cyclopentadienyl type ligands; (ii) a boron cocatalyst; and (iii) an aluminoxane cocatalyst; said catalyst being in solid form, preferably in solid particulate form, and being free from an external carrier.

Abstract: A process for the preparation of a propylene homopolymer comprising polymerizing propylene in the presence of a catalyst comprising: (i) a metallocene complex of a group (IV) metal said metallocene comprising at least two cyclopentadienyl type ligands; (ii) a boron cocatalyst; and (iii) an aluminoxane cocatalyst; said catalyst being in solid form, preferably in solid particulate form, and being free from an external carrier; preferably wherein the melting point of the propylene polymer is controlled by adjusting the amount of or nature of the boron cocatalyst.

Abstract: Process for the preparation of a solid catalyst system comprising the steps of preparing a liquid clathrate comprising a mixing of an aluminoxane, an aromatic compound and an organo-silicon compound, wherein the mol-ratio between the organo-silicon compound and aluminum of the aluminoxane is below 0.1, mixing said liquid clathrate with an organometallic compound obtaining a liquid mixture, and precipitating the solid catalyst system out of said liquid mixture by adding a saturated aliphatic compound to said mixture liquid.

Abstract: A ligand of formula (I?) wherein L is a divalent bridge selected from —R?2C—, —R?2C—CR?2—, —R?2Si—, —R?2Si—SiR?2—, —R?2Ge—, wherein each R? is independently a hydrogen atom, C1-20-hydrocarbyl, tri(C1-20-alkyl)silyl, C6-20-aryl, C7-20-arylalkyl or C7-20-alkylaryl; R2 and R2? are each independently a C1-20 hydrocarbyl radical; R5? is a C1-20 hydrocarbyl group; R6, R6?, R7 and R7? are each independently hydrogen or a C1-20 hydrocarbyl group; Ar and Ar? are independently an aryl or heteroaryl group having up to 20 carbon atoms; each R1 is a C1-20 hydrocarbyl group or two R1 groups on adjacent carbon atoms taken together can form a fused 5 or 6 membered non aromatic ring with the Ar group; and each R4 is a C1-20 hydrocarbyl group; and the dotted lines represent a double bond present in between carbons 1 and 2 or 2 and 3 of the indenyl ring.

Abstract: An asymmetric complex of formula (I) wherein M is zirconium or hafnium; each X is a sigma ligand; L is a divalent bridge selected from —R?2C—, —R?2C—CR?2—, —R?2Si—, —R?2Si—SiR?2—, —R?2Ge—, wherein each R? is independently a hydrogen atom, C1-C20-alkyl, tri(C1-C20-alkyl)silyl, C6-C20-aryl, C7-C20-arylalkyl or C7-C20-alkylaryl; R2 and R2? are each independently a C1-C20 hydrocarbyl radical; R5? is a C1-20 hydrocarbyl group; R5 is hydrogen, or a C1-20 hydrocarbyl group; R6 is a non tertiary C1-10 alkyl group or C6-10-aryl group or C7-10 arylalkyl group or ZR3; R6? is a tertiary C4-20 alkyl group; Z is O or S; R3 is a C1-20 hydrocarbyl group optionally substituted with halo; Ar is an aryl or heteroaryl group having up to 20 carbon atoms optionally substituted by one or more groups R1; Ar? is an aryl or heteroaryl group having up to 20 carbon atoms optionally substituted by one or more groups R1; each R1 is a C1-20 hydrocarbyl group or two R1 groups on adjacent carbon atoms taken together can form a fused 5

Abstract: A catalyst comprising (i) an asymmetric complex of formula (I) wherein M is zirconium or hafnium; each X is a sigma ligand; L is a divalent bridge selected from —R?2C—, —R?2C—CR?2—, —R?2Si—, —R?2Si—SiR?2—, —R?2Ge—, wherein each R? is independently a hydrogen atom, C1-C20-alkyl, tri(C1-C20-alkyl)silyl, C6-C20-aryl, C7-C20-arylalkyl or C7-C20-alkylaryl; R2 and R2? are each independently linear C1-10 hydrocarbyl; R5 and R5? are each independently hydrogen or a C1-20 hydrocarbyl group; R6 and R6? are each independently hydrogen or a C1-20 hydrocarbyl group; R7 is hydrogen or a C1-20 hydrocarbyl group or is ZR3; Z is O or S, preferably O; R3 is a C1-10 hydrocarbyl group; Ar is an aryl or heteroaryl group having up to 20 carbon atoms optionally substituted by one or more groups R8; Ar? is an aryl or heteroaryl group having up to 20 carbon atoms optionally substituted by one or more groups R8?; and R8 and R8? are each independently is a C1-20 hydrocarbyl group; with the proviso that at least one of R6 o

Abstract: A catalyst in solid particulate form free from an external carrier material comprising (I) a complex of formula (I) wherein M is zirconium or hafnium; each X is a sigma ligand; L is a divalent bridge selected from —R?2C—, —R?2C—CR?2—, —R?2Si—, —R?2Si—SiR?2—, —R?2Ge—, wherein each R? is independently a hydrogen atom, C1-C20-alkyl, tri(C1-C20-alkyl)silyl, C6-C20-aryl, C7-C20-arylalkyl or C7-C20-alkylaryl; each R2 is independently hydrogen or a C1-C20 hydrocarbyl radical provided that at least one R2 is not hydrogen; each R5 is independently hydrogen or a C1-20 hydrocarbyl group optionally containing one or more heteroatoms from groups 14-16; each R6 is independently hydrogen or a C1-20 hydrocarbyl group optionally containing one or more heteroatoms from groups 14-16; each n is independently 1, 2 or 3; and each R8 is a C1-20 hydrocarbyl group; and (ii) a cocatalyst comprising a compound of a group 13 metal, e.g. Al or boron.