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| Number | Title | Issue Date |
| 8039563 | Process for preparing lattices stabilized by polyvinyl alcohol A process for preparing polymer dispersions stabilized by polyvinyl alcohol includes a step of emulsion polymerization. The polymerization occurs such that at least 60% of the total conversion occurs at a temperature from 100° C. to 140° C. ... | 10/18/2011 |
| 8034885 | Free-radical polymerization process producing aqueous polymer dispersion with low residual monomer content utilizing oil and water soluble initiators The present invention provides a novel one-step process for preparing an aqueous polymer dispersion by the free radical aqueous emulsion polymerization comprising mixing at least water, a dispersant, and an oil-soluble initiator; raising a temperature from the start... | 10/11/2011 |
| 7943707 | Vinylidene fluoride polymer and process for producing the same A monomer comprising vinylidene fluoride as a principal component is suspension-polymerized by supplying the monomer in division to a polymerization system containing a polymerization initiator at a pressure below a critical pressure Pcr (=4.38 MPa) of vinylidene fl... | 05/17/2011 |
| 7923517 | Polymer microparticles and production method for the same A method for producing polymer particles which includes: forming polymer particles by heterogeneous polymerization of a monomer in a supercritical fluid and/or subcritical fluid, wherein a radical polymerization initiator (I) having in a molecular at least a group h... | 04/12/2011 |
| 7816466 | Propylene polymer composition for injection molding A propylene polymer composition comprising (weight percentages being referred to the sum of A+B): (A) 75-95% by weight of a copolymer of propylene comprising from 0.5 to 3.0 mole % of comonomer units derived from ethylene and/or C4-C8 alpha-olefins; and (B) 5-25% by... | 10/19/2010 |
| 7812103 | Method for reducing sheeting and agglomerates during olefin polymerisation The present invention relates to a method for reducing/suppressing sheeting or agglomerates during polymerization of olefins, especially during the fluidized bed gas phase polymerization of olefins. In particular, the present invention relates to a method for reduci... | 10/12/2010 |
| 7754831 | Vinyl polymer, process for producing vinyl polymer, thermosetting coating composition, and coating material A vinyl-based polymer having a mass average molecular weight of 1500 to 10000, which is prepared by a first step of continuously feeding a material mixture containing a vinyl-based monomer to a continuous tank type first reactor, and polymerizing the vinyl-based mon... | 07/13/2010 |
| 7718743 | Methods for monitoring reactor passivation for gas phase polymerization Methods and system for in-situ measurement of polymer growth within an olefin polymerization reactor are provided. The method includes polymerizing one or more olefins within a reactor at a first temperature sufficient to deposit a polymer coating therein. A second ... | 05/18/2010 |
| 7605214 | Process for stopping continuous polymerization The present invention provides a process for stopping continuous polymerization in which a raw material monomer is polymerized in a reaction vessel by continuously feeding the raw material monomer and a polymerization initiator in the reaction vessel, which process ... | 10/20/2009 |
| 7572867 | Polymerization process for producing polydienes There is disclosed a process for producing a conjugated diene-containing polymer wherein a stream comprising conjugated diene monomer and a specified catalyst, that includes a lanthanide compound and an aluminoxane, is passed through an orifice into the reaction zon... | 08/11/2009 |
| 7507780 | Polymerization process The present invention relates to a continuous gas phase process comprising polymerizing one or more hydrocarbon monomer(s) in a fluidized bed reactor in the presence of a Ziegler-Natta-type catalyst system and a condensable fluid for a period of at least 12 hours wh... | 03/24/2009 |
| 7399811 | Nanohybrid polymers for ophthalmic applications The present invention relates to novel materials particularly useful for ophthalmic applications and methods for making and using the same. More particularly, the present invention relates to relatively soft, optically transparent, foldable, high refractive index ma... | 07/15/2008 |
| 7351430 | Shape-retentive hydrogel particle aggregates and their uses The present invention is related to hydrogel particles and aggregates formed therefrom having characteristics including, without limitation, shape-retentiveness, elasticity, controllable pore sizes and controllable degradation rates that render them useful for a wid... | 04/01/2008 |
| 7343225 | Method for reducing off-grade product production during reaction transitions In some embodiments, a method for determining initial conditions for a transition from an initial reaction to a target reaction to minimize (or substantially minimize) the amount of off-grade material produced during the transition, and optionally also process contr... | 03/11/2008 |
| 7338928 | System for releasing encapsulated active ingredients The present invention relates to a controlled release system that can be incorporated in cosmetic, personal care, and household products to effectively encapsulate wide range of active ingredients and sensory markers and release them in response to moisture or over ... | 03/04/2008 |
| 7332549 | Process for the (co-)polymerisation of ethylene in the gas phase The present invention relates to a process for improving the start up of polymerization or copolymerization of ethylene in a gas phase reactor, preferably a fluidized bed gas phase reactor. ... | 02/19/2008 |
| 7323523 | Adjusting polymer characteristics through process control Properties of a polymer produced in gas phase or slurry phase using a dual catalyst such as polydispersity and comonomer incorporation, may be controlled by controlling reaction parameters such as temperature, (co)monomer pressure, hydrogen partial pressure and the ... | 01/29/2008 |
| 7321015 | Adjusting polymer characteristics through process control Properties of a polymer produced using a dual catalyst on the same support, such as polydispersity and comonomer incorporation, may be controlled by controlling reaction parameters such as temperature, monomer pressure, hydrogen partial pressure and the presence of ... | 01/22/2008 |
| 7319125 | Supercritical polymerization process and polymers produced therefrom This invention relates to a process to produce propylene polymers comprising contacting a metallocene catalyst compound and an activator in a reaction medium comprising propylene, from 0 to 30 volume % of one or more solvents and from 0 to 30 mole % of one or more c... | 01/15/2008 |
| 7304097 | High modulus crosslinked polyethylene with reduced residual free radical concentration prepared below the melt The present invention provides an irradiated crosslinked polyethylene containing reduced free radicals, preferably containing substantially no residual free radical. Disclosed is a process of making irradiated crosslinked polyethylene by irradiating the polyethylene... | 12/04/2007 |
| 7300987 | Polymerization process The present invention relates to a continuous gas phase process comprising polymerizing one or more hydrocarbon monomer(s) in a fluidized bed reactor in the presence of catalyst system or polymerization catalyst and a condensable fluid for a period of at least 12 ho... | 11/27/2007 |
| 7282546 | Cocatalysts for reduction of production problems in metallocene-catalyzed polymerizations Polyolefins may be prepared using a cocatalyst conforming to the formula: AIRz(Xz)nLzm wherein Rz is a linear or branched organic moiety having at least 5 carbons and Xz | 10/16/2007 |
| 7276565 | Continuous miniemulsion polymerization process A process including: heating to a first polymerization temperature a first mixture including a free radical polymerizable monomer, a free radical initiator, and a stable free radical compound to polymerize only a portion of the mon... | 10/02/2007 |
| 7259212 | (Meth)acrylic esters of polyalkoxylated trimethylolpropane The present invention relates to novel (meth)acrylic esters of polyalkoxylated trimethylolpropane of the formula where EO is O—CH2-CH2- PO is independently at each instance O—CH2-CH(CH3)- or O—... | 08/21/2007 |
| 7250470 | Crystallization of polypropylene using a semi-crystalline, branched or coupled nucleating agent A method of nucleating a propylene homo- or copolymer, the method comprising contacting the propylene polymer with a semi-crystalline branched or coupled polymeric nucleating agent under nucleation conditions. In one embodiment, the propylene homopolymer is characte... | 07/31/2007 |
| 7238752 | High molecular weight cationic polymers obtained by post-polymerization crosslinking reaction The molecular weight of cationic polymers, such as diallyldialkyl ammonium chloride, can be increased by controlled addition of a water-soluble radical initiator at an elevated reaction temperature with agitation to prepare high molecular weight, crosslinked, water-... | 07/03/2007 |
| 7235297 | Amphiphile solid support for peptide synthesis, bioorganic and organic chemistry The present invention fulfils desired specifications generally rarely encountered with existing solid supports such as highly amphiphile behaviour. The solid support described herein is a poly(ethylene or propylene)glycol based polymer that can be useful in solid an... | 06/26/2007 |
| 7220806 | Process for increasing ethylene incorporation into random copolymers A process for preparing low melting copolymers comprising contacting a mixture of olefin monomers with a CpFlu-type metallocene catalyst under reaction conditions sufficient to form a copolymer. The copolymers thus prepared desirably display melt temperatures from a... | 05/22/2007 |
| 7205369 | High molecular weight cationic polymers obtained by post-polymerization crosslinking reaction The molecular weight of cationic polymers, such as diallyldialkyl ammonium chloride, can be increased by controlled addition of a water-soluble radical initiator at an elevated reaction temperature with agitation to prepare high molecular weight, crosslinked, water-... | 04/17/2007 |
| 7205362 | Method for controlled radical polymerization The present invention relates to a process for controlled radical polymerization using an organosulfur reversible chain transfer agent which consists in preparing polymers having a molar weight of greater than 100 000 g/mol, with a polydispersity index of less than ... | 04/17/2007 |
| 7199178 | Low-solvent, OH-functional dispersions A process for preparing copolymer dispersions that includes subjecting A) one or more vinyl monomer mixtures containing a) OH-free (meth)acrylic esters and/or vinylaromatics, b) hydroxy-functional vinyl monomers and/or hydroxy-functional (meth)acrylic esters, c) ion... | 04/03/2007 |
| 7179870 | Method for the preparation of poly sg(a)-methylstyrene The invention relates to a process for the preparation of poly(α-methylstyrene) by anionic polymerization of the α-methylstyrene monomer, said process successively comprising the following stages: a) a stage of preparation of a solution comprising the... | 02/20/2007 |
| 7166650 | High modulus crosslinked polyethylene with reduced residual free radical concentration prepared below the melt The present invention provides an irradiated crosslinked polyethylene containing reduced free radicals, preferably containing substantially no residual free radical. Disclosed is a process of making irradiated crosslinked polyethylene by irradiating the polyethylene... | 01/23/2007 |
| 7166355 | Use of microcapsules in gypsum plasterboards The invention relates to the use of microcapsules with latent heat storage materials as capsule cores on gypsum plasterboards, gypsum plasterboards containing the same and a method for production thereof. ... | 01/23/2007 |
| 7148297 | Catalytic polymerization process This invention relates to a process for controlling the architecture of copolymers of at least two unsaturated monomers, made by free-radical polymerization in the presence of a cobalt-containing chain transfer agent, including the control of molecular weight, degre... | 12/12/2006 |
| 7135544 | Living olefin polymerization processes Processes for the living polymerization of olefin monomers with terminal carbon-carbon double bonds are disclosed. The processes employ initiators that include a metal atom and a ligand having two group 15 atoms and a group 16 atom or three group 15 atoms. The ligan... | 11/14/2006 |
| 7122607 | Polymerization process The present invention relates to a continuous gas phase process comprising polymerizing one or more hydrocarbon monomer(s) in a fluidized bed reactor in the presence of catalyst system or polymerization catalyst and a condensable fluid for a period of at least 12 ho... | 10/17/2006 |
| 7115688 | Nanoparticles with polymer shells The invention provides a method of preparing nanoparticles having at least one polymer shell attached to them, each polymer shell having a selected property or properties. The method comprises attaching initiation monomers to the surfaces of the nanoparticles, conta... | 10/03/2006 |
| 7115672 | Production method of porous resin A production method of a porous resin or an intermediate therefor, which comprises a step of producing a styrene-acyloxystyrene-divinylbenzene copolymer comprising suspension copolymerization of a styrene monomer, an acyloxystyrene monomer and a divinylbenzene monom... | 10/03/2006 |
| 7098301 | High pressure filter method of separating polymer solids and unreacted monomer The present invention provides a method of separating unreacted monomer from a polymerization process effluent stream. The polymerization process effluent stream has at least the following components: unreacted monomer, polymer, and solid fines. The method comprises... | 08/29/2006 |
