Did You Know...
...that a workman who left the soap mixing machine on too long was responsible for making Ivory Soap? He was so embarrassed by his mistake that he threw the mess in a stream. Imagine his dismay when the evidence of his error floated to the surface! Result: Ivory soap, the soap that floats.
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| Number | Title | Issue Date |
| 7442747 | Sulfur-functionalized carbon nanoarchitectures as porous, high surface area supports for precious metal catalysts The invention relates to sulfur-functionalized polymer gels and carbon gels, including aerogels, and such carbon gels containing platinum or metal nanoparticles. The platinum-containing gels may be useful as fuel-cell electrodes. ... | 10/28/2008 |
| 7329714 | Method of polymerizing propylene comprising olefin pre-polymerization step The present invention relates to a method of polymerizing olefin containing the step of pre-polymerization. More precisely, according to the method of the present invention, the reaction speed and temperature are regulated for pre-polymerization of a catalyst and th... | 02/12/2008 |
| 7238758 | Catalysts for polymerization or copolymerization of α-olefins, catalyst components thereof, and processes for polymerization of α-olefins with the catalysts The invention has an object to provide a catalyst for polymerizing or copolymerizing an α-olefin, catalyst constituent thereof, and method of polymerizing α-olefins with the catalyst, for production of α-olefin polymers or copolymers with high hydrogen response, ... | 07/03/2007 |
| 7153915 | Precision fragmentation assemblages and olefin polymerization catalysts made therefrom A precision fragmentation assemblage is disclosed, along with precision fragmentation assemblage catalysts derivable therefrom. A method for the preparation of a precision fragmentation assemblage is also disclosed, along with a method for preparing precision fragme... | 12/26/2006 |
| 7148302 | Catalyst for polymerization of norbornene This invention is based upon the discovery that a catalyst system which is comprised of (a) palladium or a palladium compound and (b) a fluorinated alcohol is effective for polymerizing norbornene-functional monomers into polynorbornene-functional polymers. It has b... | 12/12/2006 |
| 7125939 | Olefin polymerization with polymer bound single-site catalysts Disclosed is a process for polymerizing olefins. The process comprises polymerizing one or more olefins with a single-site catalyst in two or more polymerization stages. The catalyst comprises a transition metal complex, an activator, and a hydroxyl functional polym... | 10/24/2006 |
| 7122606 | Olefin polymerization process A process for polymerizing one or more alpha-olefins of formula CH2═CHT wherein T is a hydrogen atom or a C1–C20 alkyl radical comprising the following steps: a) contacting in a continuous way one or more of said alpha olefins wi... | 10/17/2006 |
| 7109279 | Polymerization method in pores of porous metal complex There is provided a method for producing a polymer, which is characterized by polymerizing or copolymerizing an organic compound monomer or monomers accommodated in pores of a porous metal complex. ... | 09/19/2006 |
| 7098285 | Catalyst obtained by prepolymerization of polyolefin and olefin polymerization method using the same The present invention provides a prepolymerized olefin polymerization catalyst and olefin polymerization method using the same. More particularly, the present invention provides a prepolymerized catalyst that is encapsulated with macromonomers produced by polymerizi... | 08/29/2006 |
| 7094724 | Catalytic solid supported on calcined hydrotalcite for olefinic polymerisation Catalyst solid for olefin polymerization comprising A) at least one calcined hydrotalcite and B) at least one organic transition metal compound, and also a catalyst system comprising the catalyst solid, the use of the catalyst sol... | 08/22/2006 |
| 7084220 | Catalyst system for preparing styrene polymer and method for preparing of styrene polymer using the same The present invention relates to a catalyst system for preparing styrene polymer and a method of preparing styrene polymer using the same, more particularly to a catalyst system for preparing styrene polymer capable of preventing coagulation of polymer to the reacto... | 08/01/2006 |
| 7084216 | Process for the polymerization of olefins The present invention relates to a process for homopolymerization of ethylene or copolymerization of ethylene with alpha-olefins by contacting ethylene or ethylene and alpha-olefin with a catalyst composition comprising: (a) a solid catalyst precursor comprising at ... | 08/01/2006 |
| 7041759 | Method for the preparation of well-defined metal acetamidinate-based catalysts on solid supports An olefin polymerization pre-catalyst, an activated catalyst and a process for preparing the catalysts are described herein. The pre-catalyst has the formula: wherein the groups M and R1–R4 | 05/09/2006 |
| 7009012 | Supported catalyst for producing syndiotactic styrenic polymer The present invention provides a supported catalyst comprising (A) a polymer (B) a supporter, (C) a transition metal compound, and optionally (D) (a) a compound which can form an ionic complex by the reaction with the transition metal compound or (b) a specific oxyg... | 03/07/2006 |
| 6969747 | Olefin polymerization titanium catalyst An olefin polymerization titanium catalyst. It comprises a titanium compound and an organoaluminium compound cocatalyst supported on a soluble polysulfone comprising free reactive sulfone groups. The molar ratio of titanium of aluminum is 1–10:200 and the weight r... | 11/29/2005 |
| 6924248 | Catalyst system for carrying out olefin polymerization comprising a calcined hydro-talcite serving as a supporting material Catalyst system for olefin polymerization comprising A) at least one calcined hydrotalcite, B) at least one organic transition metal compound, C) optionally one or more cation-forming compounds and D) at least one ... | 08/02/2005 |
| 6878787 | Polyamide supported metallocene catalysts Supported stereospecific catalysts and processes for the stereotactic propagation of a polymer chain derived from ethylenically unsaturated monomers such as the polymerization of propylene to produce syndiotactic polypropylene or isotactic polypropylene. The support... | 04/12/2005 |
| 6872791 | Polyolefin nano-composite Disclosed herein is a polyolefin nanocomposite prepared by polymerizing an olefin monomer in a catalyst system comprising (1) a supported catalyst consisting of a polymer, a silicate clay mineral, and a transition metal compound, and cocatalyst, an alkyl aluminoxane... | 03/29/2005 |
| 6852660 | Solid metallocene catalyst system A solid metallocene-containing catalyst system of an organoaluminoxane, at least one metallocene having at least one olefinically unsaturated substituent and a polyolefin is disclosed. The polyolefin is formed from at least one olefin polymerized in the presence of ... | 02/08/2005 |
| 6841634 | Modified supported catalysts for the polymerization of olefins A modified supported olefin polymerization catalyst modified by prepolymerization with an olefin or an olefin mixture different from the olefin or olefin mixture of the subsequent olefin polymerization. The polymerization catalyst is a metallocene, and the melting o... | 01/11/2005 |
| 6797794 | Olefins produced from pre-polymerized catalyst component catalysts Olefin polymers produced using components of catalysts obtained by contacting a Ti compound of formula Ti(OR)n-yXy, where n is the valence of titanium and y is a number between 1 and n, with a pre-polymer having a porosity higher than 0.3 cc/g ... | 09/28/2004 |
| 6774194 | Supported catalysts for the polymerization of olefins Supported catalysts for the polymerization of olefins comprise the following components: (A) a porous organic support functionalised with groups having active hydrogen atoms; (B) an organo-metallic compound of aluminium containing heteroatoms selected ... | 08/10/2004 |
| 6747103 | High-stiffness propylene polymers and a process for the preparation thereof The present invention concerns high-stiffness polymer composition and a process for producing a polymer composition by nucleated with a polymeric nucleating agent containing vinyl compound units. The method comprises modifying a catalyst by polymerizing a vinyl comp... | 06/08/2004 |
| 6713572 | Ethylene copolymerization process A process as disclosed for producing a low density polyethylene using a particle form polymerization process and a titanium-containing catalyst wherein the ratio of comonomer to ethylene is at least about 1:1 and the titanium-containing catalyst is a special catalys... | 03/30/2004 |
| 6703458 | Catalyst components for the polymerization of olefins Spherical catalyst components for the polymerization of olefins of formula RCH.dbd.CHR, in which R is, independently, hydrogen or a hydrocarbon group with 1-10 carbon atoms, containing a homogeneous transition metal compound of formula MPx, in ... | 03/09/2004 |
| 6677412 | Process for preparing a highly active metallocene catalyst supported on polymer bead for olefin polymerization The present invention relates to a process for preparing a highly active metallocene catalyst supported on polymer bead for olefin polymerization, a metallocene catalyst prepared by the said process and a method for alkylene polymerization by employing th... | 01/13/2004 |
| 6664350 | Supported polymerisation catalyst The invention relates to supported ligands and catalysts for use in the polymerization of olefinically unsaturated monomers such as vinylic monomers, comprising the use of a compound attached to support, the compound being capable of complexing with a tra... | 12/16/2003 |
| 6664349 | Ethylene polymerization process An ethylene polymerization process is disclosed. The process uses a single-site catalyst that contains a boraaryl ligand. It comprises supporting the catalyst, forming a slurry of the supported catalyst in an organic solvent, mixing the catalyst slurry wi... | 12/16/2003 |
| 6656524 | Continuous process for gas phase coating of polymerization catalyst A continuous process for gas phase coating of polymerization catalyst. The polymerization catalyst is introduced in a gas phase plug flow type reactor wherein it is submitted to polymerization conditions in the presence of at least one monomer such that a... | 12/02/2003 |
| 6617277 | Supported metallocene catalyst system for olefin polymerization A catalyst composition has a catalyst component which includes a metallocene transition metal compound, a magnesium compound, a hydroxyl containing compound, and a polymeric material. The catalyst component may also include asilicon compound and an alumin... | 09/09/2003 |
| 6583242 | Supported olefin polymerization catalysts A supported olefin polymerization catalyst system and a method of making it are disclosed. The catalyst system comprises: (a) a support having mean particle size less than about 30 microns chemically treated with alumoxane; (b) an organometallic complex c... | 06/24/2003 |
| 6583253 | Propene terpolymers with a low extractable portion Propene terpolymers consist of from 80 to 99.5 mol % of structural units derived from propene, from 0.1 to 15 mol % of structural units derived from ethene or a C4 -C6 -1-olefin (I) and from 0.1 to 15 mol % of structural units derive... | 06/24/2003 |
| 6576723 | Catalyst system and its use for the polymerization of propylene A catalyst system which can be used in the polymerization of propylene comprises at least one metallocene as a rac/meso isomer mixture, at least one organoboroaluminum compound, at least one passivated support, at least one Lewis base and, if desired, at ... | 06/10/2003 |
| 6531553 | Process for increasing molecular weight in polyolefins using Ziegler-Natta catalysts and lithium compounds This invention relates to a conventional supported heterogeneous Ziegler-Natta catalyst for the polymerization of olefins. It has been found that adding a lithium compound to a transition metal catalyst component and then adding an organoaluminum co-catal... | 03/11/2003 |
| 6524986 | Catalyst support and catalyst for the polymerization of -olefins Catalyst support containing an -olefin polymer which is in the form of particles of mean size from 5 to 350 μm in which the pore volume generated by the pores of radius from 1,000 to 75,000 Å is at least 0.2 cm3 /g. Catalyst usable for... | 02/25/2003 |
| 6476165 | Olefin polymerization process using fatty amine additives and boron-modified supported catalyst An olefin polymerization process is described. The process comprises polymerizing an olefin in the presence of a support, a single-site catalyst, an optional activator, and a fatty amine. The support is chemically treated with an organoboron compound. The... | 11/05/2002 |
| 6451726 | Pre-polymerized catalyst components for the polymerization of olefins Components of catalysts for the polymerization of olefins are obtained by contacting a Ti compound of formula Ti(OR)n-y Xy, where n is the valence of titanium and y is a number between 1 and n, with a pre-polymer having a porosity hi... | 09/17/2002 |
| 6448348 | Process for polymerizing olefins with supported Ziegler-Natta catalyst systems A catalytic polymerization process for preparing polymer products is provided. The polymerization process is either homopolymerization of olefins or copolymerization of olefins with alpha-olefins. The polymerization process is conducted in the presence of... | 09/10/2002 |
| 6444604 | Supported catalysts for the polymerization of olefins Supported catalysts for the polymerization of olefins comprise the following components: (A) a porous organic support functionalised with groups having active hydrogen atoms; (B) an organo-metallic compound of aluminium containing heteroatoms selected fro... | 09/03/2002 |
| 6437060 | Process for the polymerization of olefins in the gas phase A process for the polymerisation of olefins in the gas phase is carried out in the presence of a supported transition metal catalyst. The process involves a prepolymerisation step which may be performed in-situ and in particular the prepolymer may be prep... | 08/20/2002 |
