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| Number | Title | Issue Date |
| 8013081 | Method for preparing polymer particles A polymer particle (10) useful for opacifying includes a polymer core (12) and a polymer sheath (16) surrounding the polymer core (12). The polymer core (12) is produced by polymerizing the polymer sheath (16) around the pol... | 09/06/2011 |
| 7393510 | Decontamination of process streams A method for removing contaminants from a process stream that includes the use of reticulated material to filter the process stream in a vessel located upstream of a process unit. The reticulated material can be used with other conventional filter media within the v... | 07/01/2008 |
| 7351776 | Bulk polymerization process A method for the continuous production of polydienes, the method comprising the steps of (a) charging a mixture of one or more monomer, catalyst system, and less than 50% weight percent organic solvent based on the total weight of the monomer, catalyst and solvent, ... | 04/01/2008 |
| 7345139 | Polyester process using a pipe reactor The invention is directed to polyester processes that utilizes a pipe reactor in the esterification, polycondensation, or both esterification and polycondensation processes. Pipe reactor processes of the present invention have a multitude of advantages over prior ar... | 03/18/2008 |
| 7335008 | Apparatus and method for producing woodfuel briquettes, pellets, compounds, agglomerates, granulates, and the like An apparatus and a method for producing woodfuel briquettes, pellets, compounds, composites, agglomerates, or granulates as source material for subsequent processing in injection molding or extrusion processes, includes a pressing screw with screw spirals, which rot... | 02/26/2008 |
| 7332554 | Polymers with new sequence distributions The invention relates to new polymerization processes including diluents including hydrofluorocarbons and their use to produce novel polymers with new sequence distributions. In particular, the invention relates to copolymers of an isoolefin, preferably isobutylene,... | 02/19/2008 |
| 7332555 | Polymers with new sequence distributions The invention relates to new polymerization processes including diluents including hydrofluorocarbons and their use to produce novel polymers with new sequence distributions. In particular, the invention relates to copolymers of an isoolefin, preferably isobutylene,... | 02/19/2008 |
| 7323526 | Supported metallocene-alkyl catalyst composition A supported catalyst composition having improved flow properties is disclosed comprising an alkylalumoxane, a metallocene-alkyl an inorganic oxide support having an average particle size of from 0.1 to 50 μm and calcined at a temperature greater than 600° C., and ... | 01/29/2008 |
| 7282117 | Cellulosic fiber composites using protein hydrolysates and methods of making same Cellulosic fiber composites and finished cellulosic fiber composite articles are provided. The cellulosic fiber composites comprise cellulosic material and a resin binder. The resin binder comprises vegetable protein hydrolysates and a synthetic resin. The synthetic... | 10/16/2007 |
| 7265189 | Filtration, flow distribution and catalytic method for process streams A method for removing contaminants from an process stream that includes the use of reticulated material to filter the process stream. The reticulated material also facilitate process stream flow distribution in process units. The reticulated material can be packed w... | 09/04/2007 |
| 7232872 | Polymerization processes The invention provides for a process to produce polymers utilizing a hydrofluorocarbon diluent. ... | 06/19/2007 |
| 7220803 | Process for obtaining aqueous polymer dispersions The process comprises the following phases: formation of a pre-emulsion of monomers in water; transfer into the polymerisation reactor with stirring, of (1) reaction stock consisting of a water solution of a surfactant, in an amount by weight relative to the weight ... | 05/22/2007 |
| 7214750 | Polymerization processes The invention relates to new processes to produce polymers utilizing bayonette cooled slurry reactor systems and diluents including hydrofluorocarbons. ... | 05/08/2007 |
| 7214760 | Process for production of a carboxylic acid/diol mixture suitable for use in polyester production The present invention relates to a process by which a carboxylic acid/diol mixture is obtained from a slurry or cake carboxylic acid product without isolation of a substantially dry carboxylic acid solid. More specifically, the present invention relates to a process... | 05/08/2007 |
| 7211633 | Polyester process using a pipe reactor The invention is directed to polyester processes that utilizes a pipe reactor in the esterification, polycondensation, or both esterification and polycondensation processes. Pipe reactor processes of the present invention have a multitude of advantages over prior ar... | 05/01/2007 |
| 7157013 | Filtration method A method of filtering contaminants from a chemical process stream is disclosed. The method includes a step of passing the process stream over a filtration medium including a plurality of discrete filtration elements, each element having parallel first and second fac... | 01/02/2007 |
| 7132136 | Stacked microvoided light diffuser The invention relates to a light diffuser comprising a polymeric film wherein the film comprises a plurality of layers having void geometry in which the x/y/z size or frequency varies by at least 28% between at least two layers. ... | 11/07/2006 |
| 7132484 | Continuous process for producing poly (trimethylene terephthalate) A continuous process for the production of poly(trimethylene terephthalate) is disclosed. According to the process, a liquid feed mixture comprising bis-3-hydroxypropyl terephthalate and/or low molecular weight polyesters of 1,3-propanediol and terephthalic acid, th... | 11/07/2006 |
| 7109290 | Polymer transfer within a polymerization system A method for transferring polymer within a polymerization system, comprising continuously withdrawing the polymer from the reactor and conveying the polymer from a reactor to a flash chamber via a pressure differential between the reactor and the flash chamber. A me... | 09/19/2006 |
| 7105616 | Separation of isobutene non-reacted during polymerization of isobutene A process for working up a liquid reaction discharge of the cationic polymerization of isobutene, which substantially comprises polyisobutene, unconverted isobutene and, if required, an inert diluent, is described. Problems with foam formation when the unconverted i... | 09/12/2006 |
| 7074879 | Polyester process using a pipe reactor There are disclosed polyester processes using a pipe reactor and corresponding apparatuses. In particular, there are disclosed processes and corresponding apparatuses including an esterification pipe reactor with a recirculating reaction zone (RR zone) and a plug re... | 07/11/2006 |
| 7041750 | Process and apparatus for making supported catalyst systems for olefin polymerization A process to support a homogeneous catalyst on a porous solid support is performed in two separate zones. In the first zone the solid is contacted, under stirring, with an amount of a catalyst solution lower than the total pore volume of the solid. In the second zon... | 05/09/2006 |
| 6979752 | Continuous process for converting polytetramethylene ether diester to polytetramethylene ether glycol A continuous process for converting by transesterification the diester of polytetramethylene ether (PTMEA) to the corresponding polytetramethylene ether glycol (PTMEG). The process is characterized by the fact that the feed, consisting of PTMEA along with an alkanol... | 12/27/2005 |
| 6977283 | Polymerization process The present invention relates to a process for polymerizing monomer and comonomer(s) utilizing a bulky ligand transition metal metallocene-type catalyst or catalyst system, where the process is operated in the absence of or with a low amount of any of the isomers of... | 12/20/2005 |
| 6939927 | Process for making vinyl pyrrolidone/vinyl acetate copolymers having a very low residual vinyl pyrrolidone monomer level within a short production cycle Vinyl pyrrolidone/vinyl acetate copolymers having a very low residual vinyl pyrrolidone monomer level, i.e. | 09/06/2005 |
| 6926868 | Continuous slurry polymerization volatile removal A process/apparatus is disclosed for continuously separating a liquid medium comprising diluent and unreacted monomers from a polymerization effluent of a slurry loop reactor containing a flow of slurry therein, comprising a discharge conduit extending a distance in... | 08/09/2005 |
| 6906164 | Polyester process using a pipe reactor The invention is directed to polyester processes that utilizes a pipe reactor in the esterification, polycondensation, or both esterification and polycondensation processes. Pipe reactor processes of the present invention have a multitude of advantages over prior ar... | 06/14/2005 |
| 6906151 | Semi-continuous bimodal emulsion polymerization An aqueous semi-continuous emulsion polymerization process for producing bimodal polymer particles in volumes large than a single batch size is provided. A bimodal polymer composition prepared by the process of carrying out an aqueous semi-continuous emulsion polyme... | 06/14/2005 |
| 6875802 | Processes for preparing non-gelling high polymer compositions and thermoplastic blends thereof Disclosed are compositions and processes for preparing polymeric materials having polymerizable units derived from at least one C8 to C30 alkyl (meth)acrylate monomer, and at least one chain branching unit. The presence of the chain branching u... | 04/05/2005 |
| 6861469 | Water-in-oil polymer dispersions with improved environmental compatibility The invention relates to water-in-oil polymer dispersions consisting of a continuous organic phase and water-soluble polymers finely distributed therein, wherein said polymers have a radical monomer content of less than 1,000 ppm. The invention also relates to a met... | 03/01/2005 |
| 6861494 | Polyester process using a pipe reactor The invention is directed to polyester processes that utilizes a pipe reactor in the esterification, polycondensation, or both esterification and polycondensation processes. Pipe reactor processes of the present invention have a multitude of advantages over prior ar... | 03/01/2005 |
| 6838531 | Process and apparatus for separating diluent from polymer solids Polymer solids are maintained in an intermediate pressure zone for a desired polymer solids residence time and then transferred to a purge zone or other lower pressure zone. An increase in the polymer solids residence time in the intermediate pressure zone allows mo... | 01/04/2005 |
| 6825289 | Method for producing chemical reactive substance and polycarboxylic acid produced thereby The present invention is to provide a production method of chemical reactive substances with stable quality by which solidification, gel formation, and the resulting blockade within material injection nozzles are prevented, and contamination of a reaction system wit... | 11/30/2004 |
| 6818708 | Method of polymerizing olefin The process for polymerizing olefins uses a plurality of series-connected polymerization reactors in which at least one of second and subsequent reactors is a vapor-phase polymerization reactor containing a multicomponent gas. The process comprises the steps of: tak... | 11/16/2004 |
| 6812321 | Method for the continuous production of polybutyleneterephthalate from terephthalic acid and butanediol In a process for the continuous preparation of polybutylene terephthalate from terephthalic acid and 1,4-butanediol comprising: a) direct esterification of terephthalic acid with 1,4-butanediol in a reactor cascade comprising at least two reactors,... | 11/02/2004 |
| 6800718 | Process for producing polytrimethylene terephthalate (PTT) Process of producing polytrimethylene terephthalate (PTT) by esterification of terephthalic acid (TPA) with trimethylene glycol (TMG) in the presence of a catalytic, titanium compound, precondensation and polycondensation. The esterification is effected in at least ... | 10/05/2004 |
| 6765084 | Production process for ethylene oxide resin The present invention provides a novel production process for an ethylene oxide resin, in which, when the ethylene oxide resin is obtained, it is arranged that the resin should contain no antistatic agent, and further its water content is also easily controlled in n... | 07/20/2004 |
| 6727328 | Controlled shear and turbulence flow pattern within a liquid in a vessel The present invention provides a process to create without mechanical agitation a zone of low shear, low turbulence flow pattern within a continuous phase liquid contained in a vessel by a continuous or periodic injection of an inert, immiscible, low density fluid, ... | 04/27/2004 |
| 6723826 | Production process and production apparatus for polybutylene terephthalate An apparatus for continuously producing polybutylene terephthalate, which comprises a first reactor for reacting an aromatic dicarboxylic acid with a glycol, thereby producing an oligomer, a second reactor for polycondensating the oligomer, thereby preparing a low p... | 04/20/2004 |
| 6716934 | Method for producing ethylene-vinyl acetate copolymer, saponified product of copolymer prepared by the method, and molded product containing the same The present invention provides a method for producing an ethylene-vinyl acetate copolymer (EVA) containing 5 mol % to 60 mol % of ethylene, by copolymerizing ethylene and vinyl acetate with a polymerization initiator, in which an aliphatic alcohol having not more th... | 04/06/2004 |
