Patent application number | Description | Published |
20090318638 | Slurry Polymerisation Process of Ethylene in the Presence of Low Amount of Scavenger - The invention discloses a metallocene catalysed slurry polymerisation process s of ethylene in the presence of a low concentration of scavenger. This allows improving the anti-sheeting of the reactor during the polymerisation process. | 12-24-2009 |
20120130027 | CAPS AND CLOSURES - This invention discloses caps and closures produced by injection moulding with a bimodal high density polyethylene (HDPE) resin comprising a low molecular weight, high density polyethylene fraction substantially free of comonomer and a high molecular weight, low density polyethylene fraction, having a molecular weight distribution of at least 3.5, preferably greater than 4.0, prepared in two reactors connected in series in the presence of a metallocene-containing catalyst system, wherein the metallocene comprises a bisindenyl or a bis-tetrahydrogenated-indenyl component. | 05-24-2012 |
20120245307 | PROCESS FOR THE PREPARATION OF A PARTICULATE BIMODAL POLYETHYLENE PRODUCT - The invention relates to a process for the preparation of a particulate bimodal polyethylene product having a median particle diameter of less than 300 μm in a serially connected double loop reactor, wherein said polymerization catalyst applied in the polymerization process comprises a particulate metallocene-alumoxane catalyst immobilized on a porous silica support, wherein said polymerization catalyst has a median particle diameter of less than 50 μm; and whereby the ratio of the median particle diameter of the obtained bimodal polyethylene product to the median particle diameter of the applied polymerization catalyst is less than 30. | 09-27-2012 |
20120252988 | PROCESS FOR PREPARING A BIMODAL POLYETHYLENE PRODUCT IN A SINGLE LOOP REACTOR - The present invention relates to a process for preparing a bimodal polyethylene product in a single loop reactor, comprising polymerizing ethylene monomer and optionally one or more olefin co-monomers in the presence of a single heterogeneous polymerization catalyst consisting of a metallocene-alumoxane catalyst immobilized on a porous support wherein said metallocene comprises only one transition metal. Said polymerization catalyst consists of two physically different fractions of support particles onto which said metallocene-alumoxane catalyst is immobilized. | 10-04-2012 |
20120252989 | METHOD FOR REPLACING COMPATIBLE ETHYLENE POLYMERIZATION CATALYSTS - The present invention relates to a method for optimizing the sequential feeding of at least two ethylene polymerization catalysts to an ethylene polymerization reactor, comprising:
| 10-04-2012 |
20120264891 | METHOD FOR PRODUCING A CATALYST SLURRY BLEND - The present invention relates to a method for producing a catalyst slurry blend suitable for polymerizing ethylene in an ethylene polymerization loop reactor for obtaining an at least trimodal polyethylene product, comprising the steps of:
| 10-18-2012 |
20120271011 | PROCESS FOR THE PREPARATION OF A PARTICULATE POLYETHYLENE PRODUCT - The invention relates to a process for the preparation of a particulate polyethylene product in a loop reactor, wherein the polymerization catalyst applied in the polymerization process comprises a particulate metallocene-alumoxane catalyst immobilized on a porous silica support; and whereby said metallocene-alumoxane catalyst is heterogeneously distributed on said porous silica support. | 10-25-2012 |
20120309910 | METHOD FOR REPLACING INCOMPATIBLE ETHYLENE POLYMERIZATION CATALYSTS - The present invention relates to a method for optimizing the sequential use of at least two ethylene polymerization catalysts to an ethylene polymerization loop reactor, comprising:
| 12-06-2012 |
20130144016 | MODIFIED CATALYST SUPPORTS - A process for preparing a supported catalyst system comprising the following steps:
| 06-06-2013 |
20130144027 | ISOCYANATE-FREE METHOD FOR PREPARING POLY(CARBONATE-URETHANE) OR POLY(ESTER-URETHANE) - The present invention discloses a method for preparing polycarbonate-urethane) or poly(ester-urethane) without isocyanate | 06-06-2013 |
20130211018 | MODIFIED CATALYST SUPPORTS - The invention covers a supported catalyst system prepared according to a process comprising the following step:
| 08-15-2013 |
20130225772 | MODIFIED CATALYST SUPPORTS - A supported catalyst system comprising a coprecipitated silica-and titania-containing support, comprising alumoxane as acatalyst activating agent, and a metallocene, wherein the supported catalyst system has a Ti content of at least 0.1 wt %. | 08-29-2013 |
20130274422 | POLYCARBONATES AS NUCLEATING AGENTS FOR POLYLACTIDES - The present invention discloses the use of polycarbonate to increase the crystallisation rate of polylactides while maintaining its the mechanical properties. | 10-17-2013 |
20140045681 | Particulate Metallocene-Alumoxane Catalyst - The invention relates to a process for the preparation of a particulate polyethylene product in a loop reactor, wherein the polymerization catalyst applied in the polymerization process comprises a particulate metallocene-alumoxane catalyst immobilized on a porous silica support; and whereby said metallocene-alumoxane catalyst is heterogeneously distributed on said porous silica support. | 02-13-2014 |
20140148558 | ONE-STEP, ONE-POT PROCESS FOR PREPARING MULTIBLOCK AND GRADIENT COPOLYMER - The present invention relates to the field of tailored di-, tri- and multi-block as well as gradient polyesters/polycarbonates copolymers prepared by introducing monomers simultaneously in the reaction medium in the presence of an organometallic, metal salt or organic catalyst. | 05-29-2014 |
20140213743 | Particulate Metallocene-Alumoxane Catalyst - The invention relates to a process for the preparation of a particulate polyethylene product in a loop reactor, wherein the polymerization catalyst applied in the polymerization process comprises a particulate metallocene-alumoxane catalyst immobilized on a porous silica support; and whereby said metallocene-alumoxane catalyst is heterogeneously distributed on said porous silica support. | 07-31-2014 |
20140323683 | PROCESS FOR THE PREPARATION OF DEFINED FUNCTIONAL LACTIC ACID OLIGOMERS - A process for manufacturing defined functional lactic acid oligomers can include contacting lactide with at least one compound that is a transfer agent. Oligomers can be prepared according to the process. | 10-30-2014 |