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Patent
Total Research & Technology Feluy | Date: 2017-04-26

The present invention relates to a rotomolded article, comprising at least one metallocene-catalyzed polyethylene resin comprising at least two metallocene-catalyzed polyethylene fractions A and B, wherein the polyethylene resin comprises: at least 25% to at most 55% by weight of polyethylene fraction A based on the total weight of the polyethylene resin, wherein fraction A has a melt index MI2 of at least 25.0 g/10 min as determined according to ISO 1133, condition D, at 190C and under a load of 2.16 kg, and a density at least 0.005 g/cm 3 higher than the density of the polyethylene resin; and wherein the polyethylene resin has a density of at least 0.938 g/cm3 to at most 0.950 g/cm 3 as measured according to ASTM D-1505 at 23C; a melt index MI2 of at least 1.0 g/10 min to at most 25.0 g/10 min as determined according to ISO 1133, condition D, at 190C and under a load of 2.16 kg. The present invention also relates to a process for preparing said rotomolded article.


Patent
Total Research & Technology Feluy | Date: 2017-04-19

The present invention relates to a process for preparing a polyethylene in at least one continuously stirred tank reactor, comprising the step of: polymerizing ethylene in the presence of at least one supported metallocene catalyst, a diluent, optionally one or more co-monomers, and optionally hydrogen, thereby obtaining the polyethylene, wherein said supported metallocene catalyst comprises a solid support, a co-catalyst and at least one metallocene, wherein the solid support has a surface area within the range of from 100 to 500 m2/g, and has a D50 value within the range of from 4 m to 18 m, with D50 being defined as the particle size for which fifty percent by weight of the particles has a size lower than the D50; and D50 being measured by laser diffraction analysis on a Malvern type analyzer. The present invention also relates to polyethylene obtained by said process and to the articles comprising said polyethylene.


Patent
Total Research & Technology Feluy | Date: 2017-03-15

The invention relates to the use in an oligomerization reaction performed in the presence of hydrogen and at high temperature of a racemic bridged metallocene catalyst a metallocene compound (A) is represented by the formula R(Cp1)(Cp2) M X1 X2 wherein R is a C1-C20 alkylene bridging group; Cp1 and Cp2 are the same or different substituted or unsubstitued tetrahydroindenyl rings, wherein if substituted, the substitutions may be independent and/or linked to form multicyclic structures; M is a transition metal selected from the group consisting of titanium, zirconium and hafnium; X1 and X2 are independently hydrogen, halogen, hydride radicals, hydrocarbyl radicals, substituted hydrocarbyl radicals, halocarbyl radicals, substituted halocarbyl radicals, silylcarbyl radicals, substituted silylcarbyl radicals, germylcarbyl radicals, substituted germylcarbyl radicals; or both X1 and X2 are joined and bound to the metal atom to form a metallacycle ring containing from 3 to 20 carbon atoms; for the production of polyalpha-olefins.


Patent
Total Research & Technology Feluy | Date: 2017-01-05

The invention relates to a process for preparing a cyclic ester or a cyclic amide, comprising the step of:


Patent
Total Research & Technology Feluy and French National Center for Scientific Research | Date: 2017-05-17

A method for preparing mesoporous microporous crystalline material involving at least one mesopore-templating agent, said mesopore-templating agent being soluble under the form of unimers and able to generate a micellization with temperature increase so that unimers assemble to form micellar aggregates, and the micellization being reversible with temperature change.


Patent
Total Research & Technology Feluy | Date: 2017-03-08

The present invention relates to a composition comprising: (a) at least one first polymer selected from the group consisting of poly-L-lactide- polybutadiene (PLLA-PB) block copolymer, poly-D-lactide-polybutadiene (PDLA-PB) block copolymer, poly-L-lactide-urethane-polybutadiene block copolymer, and poly-D-lactide- urethane-polybutadiene block copolymer; and (b) at least one second polymer selected from the group consisting of poly-L-lactide, poly- L-lactide-polybutadiene (PLLA-PB) block copolymer, poly-L-lactide-urethane- polybutadiene block copolymer, poly-L-lactide-urethane, poly-D-lactide, poly-D-lactide- polybutadiene (PDLA-PB) block copolymer, poly-D-lactide-urethane-polybutadiene block copolymer, poly-D-lactide-urethane, and mixture thereof, wherein when the at least one first polymer is poly-L-lactide-polybutadiene (PLLA-PB) block copolymer, or poly-L-lactide-urethane-polybutadiene block copolymer, then the at least one second polymer is selected from the group consisting of poly-D-lactide, or poly- D-lactide-polybutadiene (PDLA-PB) block copolymer, poly-D-lactide-urethane- polybutadiene block copolymer, poly-D-lactide-urethane, and mixture thereof, or wherein when the at least one first polymer is poly-D-lactide-polybutadiene block copolymer, or poly-D-lactide-urethane-polybutadiene block copolymer, then the at least one second polymer is selected from the group consisting of poly-L-lactide, or poly-L- lactide-polybutadiene block copolymer, poly-L-lactide-urethane-polybutadiene block copolymer, poly-L-lactide-urethane, and mixture thereof; wherein said composition comprises from 40 % to 99 % by weight of said second polymer based on the total weight of the composition. The present invention also relates to a process for preparing said composition. The present invention also relates to an article comprising said composition.


Patent
Total Research & Technology Feluy | Date: 2017-06-21

The present invention relates to a polypropylene composition for thermoforming comprising: from 50 % by weight to at most 90 % by weight of a polypropylene A, wherein polypropylene A is a polypropylene random copolymer, based on the total weight of the polypropylene composition; and from 10 % by weight to at most 50 % by weight of a polypropylene B, wherein polypropylene B is a polypropylene homopolymer, based on the total weight of the polypropylene composition; wherein the melt flow index of polypropylene B is at most 1.0 g/10min, as measured according to the method of standard ISO 1133, condition M, at 230 C and under a load of 2.16 kg; and wherein the ratio of the melt flow index of polypropylene A to the melt flow index of polypropylene B is at least 80.


Patent
Total Research & Technology Feluy | Date: 2017-06-21

The present invention relates to a process for preparing a polyethylene product having a multimodal molecular weight distribution, said process comprising the steps of: (a) feeding ethylene monomer, a diluent, at least one metallocene catalyst, optionally hydrogen, and optionally one or more olefin co-monomers into a first slurry loop reactor; and polymerizing the ethylene monomer, and the optionally one or more olefin co-monomers, in the presence of said at least one metallocene catalyst, and optionally hydrogen, in said first slurry loop reactor thereby producing a first polyethylene fraction; (b) feeding the first polyethylene fraction to a second slurry loop reactor serially connected to the first slurry loop reactor, and in the second slurry loop reactor polymerizing ethylene, and optionally one or more olefin co-monomers, in the presence of the first polyethylene fraction, and optionally hydrogen, thereby producing a second polyethylene fraction; and (c) feeding the second polyethylene fraction to a gas phase reactor serially connected to the second slurry loop reactor, and in the gas phase reactor polymerizing ethylene, and optionally one or more olefin co-monomers, in the presence of the second polyethylene fraction, and optionally hydrogen, thereby producing the polyethylene product, wherein at least 25 % by weight of the polyethylene product is prepared in the first slurry loop reactor.


Patent
Total Research & Technology Feluy | Date: 2017-07-12

The present invention relates to a polypropylene composition comprising: a first polypropylene homopolymer or random copolymer (PPR1) having a comonomer content lower than the comonomer content of the second polypropylene, a second polypropylene (PPR2) which is a random copolymer of propylene and of the comonomer; said comonomer being an alpha-olefin different from propylene, the melting temperature of the polypropylene composition (Tm(PPR)) being defined as Tm(PPR) > 165 - 6.9*[total comonomer content] - 8.4*[comonomer content of the first polypropylene], the difference between the melting temperature and the crystallization temperature of the polypropylene composition ranges from 27 and 33, and a xylene soluble fraction (XS) at 23C of not more than 1.5 wt. %. The present invention also relates to a process for the preparation of said polypropylene composition. The present invention further relates to the use of said polypropylene composition for producing films or moulded articles.


Patent
Total Research & Technology Feluy and Polynt Composites France | Date: 2017-07-19

The present invention relates to an article and to method for preparing said article, said article comprising (i) at least one layer A comprising fibers embedded in a composition comprising at least one vinyl ester resin; and (ii) a layer B comprising: from 40 to 100 %, preferably from 75 to 100 % by weight relative to the total weight of said layer B of at least one thermoplastic polyester; from 0 to 60 % by weight relative to the total weight of said layer B of a polyolefin composition; said composition comprising at least one polyolefin, preferably said at least one polyolefin is polyethylene; and from 0 to 20 % by weight relative to the total weight of said layer B of at least one additive selected from compatibilizing agent and/or impact modifier; wherein said layer B is selected from the group comprising a blow moulded layer, an injected moulded layer, an extruded-thermoformed layer, a sheet extruded layer, a pipe extruded layer, and an injection stretch-blow moulded layer, and wherein at least one layer A is in contact with layer B.

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