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| Number | Title | Issue Date |
| 7141636 | Method for producing a polymer The present invention relates to a process for preparing a catalyst, a novel polymer and a process for preparing the polymer. In particular, the invention provides a process for preparing a homopolymer and/or copolymer having an irregular particle structure and ... | 11/28/2006 |
| 7122582 | Production method of porous spherical particles of vinyl polymer The present invention provides a method of producing porous spherical particles, which includes suspension polymerization of a multifunctional monomer having two or more vinyl groups and a vinyl monomer having one vinyl group in an aqueous medium in the presence of ... | 10/17/2006 |
| 7098253 | Macroporous ion exchange resins Ion exchange resins are described that are hydrophilic, crosslinked (meth)acrylic copolymers. The ion exchange resins are macroporous, have a surface area of at least 50 m2/g, and an average particle size of at least 20 micrometers. Additionally, chromato... | 08/29/2006 |
| 6977286 | Crosslinked rubber particles and rubber compositions An objective of the invention is to provide a rubber composition which has satisfactory processability and dimension stability, and the like, gives a vulcanized rubber exhibiting excellent wearing resistance and tensile strength, and the like, and thus is useful in ... | 12/20/2005 |
| 6949601 | Single stage seed polymerization for the production of large polymer particles with a narrow size distribution The present invention concerns large spherical polymer particles with a narrow size distribution and a procedure for producing such particles. The procedure is characterized in that a seed polymerization is performed in which the start particles have a very high abi... | 09/27/2005 |
| 6943223 | 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 liquid phase contained in a vessel and comprising a dispersed phase consisting of particles or immiscible liquid drop... | 09/13/2005 |
| 6939922 | Coating and coating composition Provided are improved coatings, polymeric dispersions, and polymeric composites, which include crosslinked polymeric nanoparticles (hereafter “PNPs”). Also provided are methods for forming improved coatings, polymeric dispersions, and polymeric composites, which... | 09/06/2005 |
| 6936647 | Bead polymerizates containing halogen-free phosphourus compounds The present invention relates to novel crosslinked bead polymers having an average particle size of 1 to 1000 μm containing specific, halogen-free phosphorus compounds including triphenyl phosphate as the halogen-free phosphorus compound, and to a process for the p... | 08/30/2005 |
| 6924317 | Process for producing coarse-particle anion-exchanger gels The present invention relates to a process for producing monodisperse anion-exchanger gels with high stability, purity and coarse particle size greater than 800 μm starting from a monodisperse bead polymer with a swelling index of from 2.5 to 7.5 and more than one ... | 08/02/2005 |
| 6887960 | Bioadhesive composition A bioadhesive composition is disclosed which includes copolymer particles containing as polymerized units, terminally unsaturated acid-containing oligomers and ethylenically unsaturated nonionic monomers. A method of preparing the bioadhesive composition and a metho... | 05/03/2005 |
| 6861484 | Amphipathic polymer particles and methods of manufacturing the same The invention is directed to amphipathic polymeric particles that serve as both the dispersant and the binder in water based inks, ink compositions containing these particles, and methods for making the particles. The polymeric particles contain both hydrophilic and... | 03/01/2005 |
| 6858299 | High solids process for preparing polymeric nanoparticles The present invention relates to an emulsion free high solids process for preparing crosslinked polymeric nanoparticles of 1-200 nm in diameter. ... | 02/22/2005 |
| 6846564 | Cross-linked acrylic microparticles, method for the production thereof and use thereof in coverings and moulding products The invention relates to cross-linked acrylic microparticles, a method for the production thereof by polymerization in a dispersion in a non aqueous medium and to the uses thereof in covering or moulding compositions involving a favourable compromise between hardnes... | 01/25/2005 |
| 6800709 | Method of preparing polymer particles having narrow particle size distribution A method has been described of preparing monodisperse polymer particles by free radical polymerization or copolymerization of hydrophobic monomers in a water-based system in the presence of cyclodextrin, characterized in that said free radical polymerization is perf... | 10/05/2004 |
| 6794448 | Resin particles and process for producing the same Subjects of the present invention are to provide resin particles having high ability and suitable for various purposes and to provide preparation method thereof. This invention provides resin particles each of which is formed by two curved surfaces or by one ... | 09/21/2004 |
| 6645901 | Prepolymerization catalyst for use in gas phase polymerization of olefins and process for producing the same A prepolymerization catalyst for use in a gas phase polymerization of an olefin or combinations of olefins which comprises (A) a solid catalyst component comprising magnesium, halogen, titanium and an electron donor and having a weight-average particle di... | 11/11/2003 |
| 6515030 | Determining production parameters of scale flow device A device for producing disperse mixtures by ultrasound, containing a housing, and a reaction chamber within the housing and at least one sonotrode having a free emitting surface which is directly in effective connection with the reaction chamber and whose... | 02/04/2003 |
| 6492471 | Method for producing bead polymers A continuous process for the preparation of inorganic and organic bead polymers using a static micromixer is disclosed. The bead polymers obtainable by the process according to the invention have a very uniform particle size distribution, which can be set... | 12/10/2002 |
| 6368708 | Polyolefin microspheres Microspheres comprise a polymer or copolymer including one or more of 1) a plurality of C3 or larger alpha-olefin units wherein the polymer has an average number of branch points less than one per monomer unit, and 2) a plurality of C2 | 04/09/2002 |
| 6323259 | Acrylic resin composition, acrylic premix, process for producing acrylic artificial marble and thickening agent The present invention is directed to an acrylic resin composition obtained by adding a non-crosslinked polymer powder having a bulk density within the range from 0.1 to 0.7 g/ml, an oil absorption based on linseed oil within the range from 60 to 200 ml/10... | 11/27/2001 |
| 6297334 | TFE polymerization process Process for the preparation of tetrafluoroethylene (TFE) polymer-based dispersions having diameter average sizes in the range 0.005-0.06 μm, which comprises: a) preparation of an aqueous perfluoropolyether (PFPE) microemulsion; b) microemulsion feeding into t... | 10/02/2001 |
| 6288189 | Polyolefin microspheres Microspheres comprise a polymer including one or more of 1) a plurality of C3 or larger alpha-olefin units wherein the C3 or larger alpha-olefin units are incorporated into the polymer so as to give an average number of less than one... | 09/11/2001 |
| 6248849 | Precipitation polymerization process for producing an oil adsorbent polymer capable of entrapping solid particles and liquids and the product thereof A process for producing a microporous oil sorbent polymer comprising the steps of: dissolving a polyunsaturated monomer in a silicone organic solvent to provide a monomer mixture containing more than 90% by weight polyunsaturated monomer; polymerizing sai... | 06/19/2001 |
| 6239224 | Method of production of particulate polymers The invention provides a process for the preparation of a particulate polymer having a mode particle size of at least 200 μm, the improvement comprising the use of substantially monodisperse polymeric particles as polymerization seeds in a suspension pol... | 05/29/2001 |
| 6228925 | Two-stage seed swelling procedure for producing monodisperse PVC particles A procedure for the production of PVC particles with a narrow size distribution in the range 10-50 μm, preferably 10-30 μm, in which, in a first stage, a vinyl monomer or a mixture of monomers is polymerised to form a polymer/oligomer seed particle in t... | 05/08/2001 |
| 6191193 | Microspheric embolic materials having a dual structure of poly(vinyl acetate) core and poly(vinyl alcohol) shell and method for preparing the same A method for separating poly(vinyl acetate) particles having various particle sizes, which have been prepared by suspension polymerization of vinyl acetate monomers, into respective microspheric poly(vinyl acetate) particles with uniform particle size dis... | 02/20/2001 |
| 6156839 | Aqueous dispersion of small particles of polytetrafluoroethylene An aqueous microemulsion polymerization procedure is described in which very small colloidal polymer particles are produced from tetrafluoroethylene monomer. The polymerization procedure involves adding a free-radical initiator to a mixture of a microemul... | 12/05/2000 |
| 6114271 | Process for the preparation of a polymerization and copolymerization of ethylene to give ultrahigh molecular-weight ethylene polymers Process for the preparation of a catalyst component for the polymerization and copolymerization of ethylene to give ultrahigh-molecular-weight ethylene polymers. Reaction of a Grignard compound with a halogenating agent, a titanium compound, a perhalogen ... | 09/05/2000 |
| 6075105 | Polymerization processes and resin particles formed thereby A process for the preparation of resin particles comprising: heating a mixture comprised of a free radical initiator compound, at least one stable free radical compound, at least one free radical polymerizable monomer compound, and at least one free radic... | 06/13/2000 |
| 6060571 | Acrolein-releasing copolymers Acrolein polymer from acrolein and one or more polyhydric alcohols, characterized by release of monomeric acrolein in aqueous systems and hence by a prolonged effect on microorganisms, is prepared by adding acrolein to a reaction medium containing catalys... | 05/09/2000 |
| 5965676 | Production process, production apparatus, and product of resin particle The present invention provides a polymerizable monomer composition particle and a resin particle, both of which display a narrow particle diameter distribution. A process for producing a resin particle comprises the steps of: passing two liquids through a... | 10/12/1999 |
| 5763551 | Process for preparing filterable polystyrene dispersion Particulate, filterable polystyrene formulations are obtained by anionic polymerization of styrene in nonaqueous dispersion if the polymerization is carried out in an aliphatic hydrocarbon as the dispersing medium and with a styrene/diene/styrene three-bl... | 06/09/1998 |
| 5691421 | High moisture adsorptive and desorptive fine particles and process for producing the same Fine particles (having a particle diameter smaller than 10 μm) of crosslinked acrylonitrile polymer capable of absorbing and releasing a large amount of moisture, in which the acrylonitrile polymer is crosslinked with hydrazine such that the nitrogen con... | 11/25/1997 |
| 5663266 | Waterborne coating compositions This invention provides latex compositions prepared using, for example, both acetoacetoxyethyl methacrylate (AAEM) and t-butylaminoethyl methacrylate (t-BAMA) which when applied to a pre-coated substrate, possess out-standing wet adhesion when compared to... | 09/02/1997 |
| 5625021 | Method for the production of plastic particles The invention relates to a method for the production of poly(meth) acrylate particles with a particle diameter of 1-15 μm, where the monomers M are polymerized according to the method of batch polymerization, with 20-50 parts by weight of monomer M in a ... | 04/29/1997 |
| 5599854 | Preparation of butadiene-based impact modifiers An improved process for preparing core/shell MBS modifiers is disclosed, wherein by adding feeds of the monomers which form the second and/or third stage polymers prior to completion of polymerization of the earlier stages, a process with substantially re... | 02/04/1997 |
| 5589157 | Hairsprays and acrylic polymer compositions for use therein Aqueous acrylic polymer compositions comprising a copolymer of an alkyl acrylate, an alkyl methacrylate and one or more acrylate acids or salts thereof are disclosed. By introducing an alkoxylated surfactant having a surface tension of greater than about ... | 12/31/1996 |
| 5578689 | Polymeric composition obtained by suspended emulsion polymerization Vinyl polymers, e.g., the homo- and copolyvinyl chlorides, are prepared in one or more stages, to a degree of conversion of at least 50%, by suspended emulsion polymerizing at least one vinyl monomer, e.g., vinyl chloride, said at least one monomer having... | 11/26/1996 |
| 5563226 | Process for making photographic polymeric matte bead particles A process of making polymeric matte bead particles for use in photographic elements which comprises forming a suspension of ethylenically unsaturated monomer droplets in an aqueous media, subsequent to the formation of droplets and before commencement of ... | 10/08/1996 |
| 5559202 | Bowl-shape microparticle and production thereof The present invention provides new non-spherical microparticles. The microparticles are a hemisphere or a half elliptic sphere having a big opening at the central portion, say bowl-shape microparticles, and a water uptake of from 80 to 140 ml/100 g, which... | 09/24/1996 |
