Class / Patent application number | Description | Number of patent applications / Date published |
526078000 | Adding material to an on-going polymerization reaction, said addition being other than the continuous addition of the initial charge | 32 |
20090306314 | METHOD FOR PRODUCING OLEFIN POLYMER - In a method for producing an olefin polymer to polymerize olefin by supplying olefin and a catalyst for polymerizing olefin into a vapor-phase fluidized bed reactor, the method includes introducing a fluidity improving agent comprising a compound represented by the following formula into the vapor-phase fluidized bed reactor. | 12-10-2009 |
20100093952 | DEPOSIT DEACTIVATION TREATMENT METHOD - The object of the present invention is to provide a treatment method which deactivates deposits in a reactor and the like in a production process of an α-olefin low polymer. The present invention relates to that after completion of the production of a low polymer of ethylene in a reactor | 04-15-2010 |
20120130028 | PROCESS FOR THE PREPARATION OF LOW-PEROXIDE CROSSLINKED VINYLLACTAM POLYMER - Process for the preparation of low-peroxide crosslinked vinyllactam polymer by free-radical polymerization in the presence of at least one organic substance acting as antioxidant, low-peroxide crosslinked vinyllactam polymer obtainable by this process, and its use. | 05-24-2012 |
20120184690 | Method for Continuous Production of Water-Absorbent Polymer Particles - A process for continuously producing water-absorbing polymer particles, comprising polymerization of a monomer solution or suspension on a continuous belt, drying, grinding, classifying and at least partly recycling the undersize obtained in the classification, wherein the recycled undersize is mixed with the monomer solution or suspension. | 07-19-2012 |
20130296508 | Substance Container for a Chemical Reaction - Disclosed is a method for carrying out a chemical reaction in a reactor, at least one substance is present in a container that is closed in a gas-tight manner, is introduced into the reactor in said container and is released by breaking open the container. The container is designed such that it breaks open when a specified bursting pressure difference between the internal pressure and external pressure is exceeded. The container is broken open and the substance located in the container is thus released as a result of deliberate application in the reactor of a pressure difference exceeding the bursting pressure difference. | 11-07-2013 |
20140058051 | HIGH THROUGHPUT REACTOR ASSEMBLY FOR POLYMERIZATION OF OLEFINS - Reactor assembly for the production of polymers including a fluidized bed reactor ( | 02-27-2014 |
526079000 | Adding in an incremental or sequential manner | 6 |
20080255326 | Process For Preparing Graft Polymers - Processes for preparing graft polymers and their use for inhibiting gas hydrates | 10-16-2008 |
20110178256 | STYRENE-BUTADIENE POLYMERS WITH STYRENE GRADIENT AND METHODS OF MAKING THE SAME - The invention provides a process for polymerizing a polymer comprising monomeric units derived from styrene and 1,3-butadiene, said process comprising: A) adding less than 60 weight percent of the total amount of the butadiene used in the polymerization, to a reactor comprising the total amount of styrene used in the polymerization and solvent; B) initiator to the reactor, and allowing the reaction to proceed for a time t; C) adding the remaining amount of butadiene to the reactor in two or more separate additions; and wherein for each burtadiene addition, the amount of subsequent butadiene added is less than, or equal to, the amount of butadiene added in the immediately prior addition; and wherein for each butadiene addition, the butadiene is added over a time, t | 07-21-2011 |
20110306738 | METHODS FOR PRODUCING TELECHELIC POLYOLEFINS FROM TERPENE INITIATORS - Provided herein are methods for the preparation of telechelic polyolefins via polymerization reaction with a terpene initiator. | 12-15-2011 |
526080000 | Polymerizing in the presence of water | 3 |
20090312504 | Copolymer Synthesis Process - Preparing a non-ionic copolymer having a hydrolysable monomer residue and a polyether macromonomer residue in a semicontinuous mode in a polymerization reactor associated with a metering device, including introducing polyether macromonomer and water into the reactor, wherein hydrolysable monomer which is added thereto forms a polymerization reaction mixture; introducing hydrolysable monomer into the metering device; adding hydrolysable monomer into the reactor from the metering device; passing a free radical polymerization initiator into the reactor before and/or during the addition of the hydrolysable monomer, the hydrolysable monomer and the polyether macromonomer reacting by free radical polymerization to form the non-ionic copolymer; and, subjecting the reaction mixture to polymerization while an addition rate of the hydrolysable monomer and/or at least a component of the polymerization initiator is varied stepwise or continuously. No monomer is introduced to incorporate ionic cement binding sites into the non-ionic copolymer. | 12-17-2009 |
20190144585 | PROCESS FOR PREPARING AN AQUEOUS POLYMER LATEX | 05-16-2019 |
526081000 | Added material is other than monomer per se, or composition containing monomer | 1 |
20120184691 | STORAGE STABLE AND SAFE PEROXIDE EMULSIONS WITH A HIGH ACTIVE OXYGEN CONTENT - Emulsion comprising an oil phase dispersed in an aqueous phase, wherein said oil phase comprises at least 53 wt % of one or more organic peroxides, more than 50 wt % of which have a molecular active oxygen content of at least 7.00 5 wt %, said emulsion satisfying the classification tests for organic peroxide type F. This emulsion allows the safe transport and storage of organic peroxide emulsions with high active oxygen content without the need for larger vent openings or higher design pressure of transport tanks and storage tanks. | 07-19-2012 |
526082000 | Adding polymerization inhibitor or terminator, e.g., short-stopper, etc. | 8 |
20120035336 | NOVEL MULTIFUNCTIONAL INITIATORS FOR ANIONIC POLYMERIZATION AND POLYMERS THEREOF - The embodiments of the invention relate to a multifunctional lithiated amine-containing compound comprising at least two molecules of lithiated amine in a molecule of the compound. In one embodiment, the compound has a formula | 02-09-2012 |
20130030133 | ANIONIC POLYMERIZATION METHODS FOR PRODUCING FUNCTIONALIZED POLYMERS - A process for producing functional polymer, the process comprising the steps of reacting an anionic initiator including a functional group with a stabilizing monomer to produce a stabilized initiator, reacting the stabilized initiator with monomer capable of being anionically polymerized to produce a polymer, and terminating the polymer. | 01-31-2013 |
526083000 | Added material contains nitrogen compound | 3 |
20120184692 | METHOD FOR PREPARING LINEAR ALPHA-OLEFINS - The present invention relates to a method for preparing linear alpha-olefins (LAO) by oligomerization of ethylene in the presence of a solvent and homogeneous catalyst, comprising the steps of:
| 07-19-2012 |
20120277385 | METHODS FOR TERMINATING OLEFIN POLYMERIZATIONS - Catalyst deactivating agents and compositions containing catalyst deactivating agents are disclosed. These catalyst deactivating agents can be used in methods of controlling polymerization reactions, methods of terminating polymerization reactions, methods of operating polymerization reactors, and methods of transitioning between catalyst systems. | 11-01-2012 |
20150337056 | Method for Immediately Terminating Radical Polymerizations, Inhibitor Solution, and Use Thereof - A method is described for immediately terminating free radical polymerizations by adding an inhibitor solution comprising a phenothiazine compound and/or a monoalkyl ether of hydroquinone to the free radical polymerizing system. The method is characterized in that the solvent of the inhibitor solution comprises at least 50% by weight of said solvent of alkylene glycol and/or polyalkylene glycol and/or terminally etherified derivatives of alkylene glycol and/or of polyalkylene glycol. The method permits the use of nontoxic inhibitor solutions. | 11-26-2015 |
526084000 | Added material contains oxygen compound | 3 |
20100286348 | HYDROXYARYL FUNCTIONALIZED POLYMERS - Vulcanizates with desirable properties can be obtained from compounds incorporating polymers that include hydroxyl group-containing aryl functionalities. The functionalities can be incorporated by using any or all of appropriate initiators, monomers and optional terminating compounds. Such polymers exhibit excellent interactivity with both conventional and non-conventional fillers. | 11-11-2010 |
20120329962 | Methods for Operating a Polymerization Reactor - Methods for shutting down and restarting polymerization in a gas phase polymerization reactor are provided. The method can include introducing a polymerization neutralizer to the reactor in an amount sufficient to stop polymerization therein. The method can also include stopping recovery of a polymer product from the reactor and stopping introduction of a catalyst feed and a reactor feed to the reactor. The method can also include adjusting a pressure within the reactor from an operating pressure to an idling pressure. The method can also include adjusting a superficial velocity of a cycle fluid through the reactor from an operating superficial velocity to an idling superficial velocity. The method can also include maintaining the reactor in an idled state for a period of time. | 12-27-2012 |
20130211019 | Polymerization Process with In-Situ Initiator Formation - A process for the polymerization of one or more monomers wherein at least one anhydride and at least one peroxy compound selected from inorganic peroxides, organic hydroperoxides, and peroxyacids are dosed during the polymerization reaction in a continuous or intermittent fashion to a reaction mixture comprising said monomers. | 08-15-2013 |
526086000 | Adding catalyst or catalyst component | 6 |
20090062486 | Method of Changing Between Incompatible Polymerization Catalysts in a Gas-Phase Fluidized-Bed Reactor - Method of changing from a polymerization using a first catalyst to a polymerization using a second catalyst which is incompatible with the first catalyst in a gas-phase reactor, which comprises the steps a) stopping of the polymerization reaction using the first catalyst, b) flushing of the reactor under polymerization conditions with at least one deactivating agent comprising a volatile constituent and a nonvolatile constituent in a weight ratio of from 0.1 to 1000, c) introduction of the second catalyst into the reactor and d) continuation of the polymerization using the second catalyst. | 03-05-2009 |
20100010175 | Additives for Polyolefin Extruder Start-Up - Polymerization processes and polymers formed therefrom are described herein. The polymerization processes generally include contacting an olefin monomer with a catalyst system to form polymer within a reaction vessel, withdrawing polymer from the reaction vessel, contacting the polymer with one or more initiation additives to form a modified polymer and extruding the modified polymer. | 01-14-2010 |
20100041841 | EFFERVESCENT NOZZLE FOR CATALYST INJECTION - A nozzle for catalyst injection for olefin polymerization is provided. In one or more embodiments the nozzle includes a first conduit including a body, a tapered section, and an injection tip. The nozzle also includes a second conduit having an inner surface and an outer surface. The first conduit is disposed about the second conduit defining a first annulus therebetween. The nozzle further includes a support member at least partially disposed about the outer surface of the first conduit defining a second annulus therebetween. The support member has a converging outer surface at a first end thereof. | 02-18-2010 |
20110112261 | PROCESS FOR THE PREPARATION OF BRANCHED POLYBUTADIENE WITH A HIGH CONTENT OF 1,4-CIS UNITS - Process for the preparation of polybutadiene effected by the polymerization of butadiene in an aliphatic and/or cyclo-aliphatic solvent in the presence of a catalytic system prepared in situ which comprises: (i) a carboxylate of neodymium soluble in the process solvent containing a variable quantity of water, the H | 05-12-2011 |
20150315315 | PROCESS FOR STOPPING AND RESTARTING POLYMERISATION - The present invention relates to a process for stopping and restarting polymerisation in a polymerisation system comprising a gas phase fluidised bed or stirred bed reactor, a degassing vessel and a seedbed storage silo, said process comprising the steps of: a) Conducting a first polymerisation reaction in the reactor using a first polymerisation catalyst system to produce a first polymer, b) Stopping the first polymerisation reaction and removing at least the majority of the first polymer in the reactor to the degassing vessel, and either: c1) Introducing from the seedbed storage silo and into the reactor a seed-bed compatible with a second polymerisation reaction, said seed-bed being of a different material to the first polymer, d1) Passing to the seedbed storage silo at least a portion of the first polymer from the degassing vessel to thereby form a new seedbed in the storage silo, and e1) Conducting the second polymerisation reaction in the reactor to produce a second polymer; or c2) Optionally, maintaining in the seedbed storage silo a seed-bed compatible with a second polymerisation reaction, d2) Passing to the reactor at least a portion of the first polymer from the degassing vessel to thereby form a new seedbed in the reactor, and e2) Conducting a polymerisation reaction in the reactor to produce polymer. | 11-05-2015 |
20160122453 | Methods of Catalyst Activation - A method comprising preparing a multi-component catalyst system comprising a catalyst and a cocatalyst, and adjusting the level of at least one component of the catalyst system to maintain a user-desired level of catalyst activity throughout a process, wherein the component comprises a catalyst activator and wherein the catalyst activator comprises the catalyst or the cocatalyst. A method comprising contacting a polymerization catalyst system comprising a Ziegler-Natta catalyst and a cocatalyst with a catalyst activator at least twice during a polymerization process, wherein the polymerization process is carried out in a reactor system comprising multiple reactor types. | 05-05-2016 |
526087000 | Adding monomer | 6 |
20090143547 | METHOD FOR PRODUCING A FUNCTIONAL VINYL HALIDE POLYMER - This invention offers a functional vinyl halide polymer that has excellent processing properties for the end-user processing without any extra processing aid. This functional vinyl halide polymer has good fusion, lubrication and melting strength in processing. The finished products show a good characterization of high transparence, low air-mark and low flow-mark. The functional vinyl halide polymer is produced by a solution, bulk or suspension polymerization. Vinyl halide or a monomer mixture comprising mainly vinyl halide is polymerized in an aqueous medium in the presence of an acrylic copolymer latex/powder to obtain the functional vinyl halide polymer. The functional vinyl halide polymer manufacturing process mainly comprises the copolymerization or graft-polymerization of: (A) 90.0 wt %˜99.9 wt % based on the total composition of the vinyl halide or the monomer mixture, and (B) 10.0 wt %˜0.1 wt % based on the total composition of the alkyl acrylate monomers or the acrylic polymer latex/powder, wherein the former can be added stepwisely or all in one time and the later can be charged continuously into reactor during polymerization or charged into a reactor before polymerization. | 06-04-2009 |
20100204418 | Method for Producing Silane-Modified Copolymers - The invention relates to a process for the preparation of a polymeric mixture, comprising a first polymerization step in which substantially monomer M is reacted by atom transfer radical polymerization in a mixture which contains a transition metal salt, a ligand having at least two chelating sites, an atom transfer radical polymerization initiator, a reducing agent and monomer M, and a second polymerization step in which monomer S substituted by silyl groups is added to the mixture obtained from the first polymerization step, so that monomer S substituted by silyl groups is reacted by atom transfer radical polymerization in the mixture obtained from the first polymerization step. The polymeric mixture obtained is used as a binder additive for sealants. | 08-12-2010 |
20100261857 | OLEFIN/(METH)ACRYLATE BLOCK COPOLYMER AND METHOD FOR PRODUCING THE SAME - An olefin/(meth)acrylate block copolymer in which a polyolefin segment obtained by polymerization of an olefin is covalently-bonded to a poly(meth)acrylate segment obtained by polymerization of a (meth)acrylate compound, and | 10-14-2010 |
20110245437 | METHOD OF FREE RADICALLY POLYMERIZING VINYL MONOMERS - A method for the polymerization of free radically polymerizable vinyl monomers involves polymerizing free radically (co)polymerizable vinyl monomers in a batch reaction under essentially adiabatic conditions, and utilizing scavenger monomer to reduce undesirable residual monomer. | 10-06-2011 |
20110319574 | Hexafluoropropylene Oxide Polymer Compositions and a Preparing Method of Hexafluoropropylene Oxide Polymer Using Hexafluoropropylene Oligomer - The present invention relates to hexafluoropropylene oxide polymer composition and a process of preparing of hexafluoropropylene oxide polymer by an anionic polymerization, and in particular the hexafluoropropylene oxide polymer composition comprises an anionic initiator, a polar solvent, hexafluoropropylene and hexafluoropropylene oxide. The hexafluoropropylene oxide polymer is prepared under particular reaction conditions by using the composition, hexafluoropropylene oxide polymer prepared by using the composition according to a preparation process herein has a weight average molecular weight (Mw) of 1,500-4,000 at −10-20° C. | 12-29-2011 |
20190144652 | SOFT AND TRANSPARENT PROPYLENE COMPOLYMERS | 05-16-2019 |