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| Number | Title | Issue Date |
| 7989568 | Fluorosulfonates A process comprising polymerizing in an aqueous medium at least one fluorinated olefin monomer other than vinylidene fluoride in the presence of a compound of formula (1): Rf(CH2CF2)m—(CH2)n | 08/02/2011 |
| 7365115 | Composition for antireflection coating and method for forming pattern An anti-reflective coating film is formed by applying on a chemically amplified photoresist film an anti-reflective coating composition comprising an alkali-soluble fluorine-containing polymer, an acid, an amine and a solvent capable of dissolving these components a... | 04/29/2008 |
| 7230038 | Branched chain fluoropolymers Fluoropolymers are made by admixing tetrafluoroethylene, hexfluoropropylene, and vinylidene fluoride; reacting the reaction admixture to generate a set of fluoropolymeric oligomers; irradiating the fluoropolymeric oligomeric precursor admixture (preferably with elec... | 06/12/2007 |
| 7220708 | Drilling fluid component A method and composition is provided for a relative permeability modifying polymer for use with drilling fluids that comprises a water soluble polymer formed from a hydrophobic or hydrophobically modified hydrophilic monomer and a hydrophilic monomer. In an alternat... | 05/22/2007 |
| 7216707 | Cement compositions with improved fluid loss characteristics and methods of cementing using such cement compositions The present invention provides a method of cementing in a subterranean formation that includes providing a cement composition that includes water, cement, and a fluid loss control additive that includes a water-soluble hydrophobically modified polymer or a hydrophil... | 05/15/2007 |
| 7207387 | Methods and compositions for use with spacer fluids used in subterranean well bores The present invention relates to spacer fluids used in subterranean operations and, more particularly, to spacer fluids that comprise water-soluble relative permeability modifiers and methods of using the spacer fluids in subterranean operations. In one embodiment, ... | 04/24/2007 |
| 7186786 | Chain transfer agents for RAFT polymerization in aqueous media Polymers and copolymers synthesized by means that yield a narrow range of molecular weights can have different properties than polymers synthesized by conventional means. In order to obtain such polymers, however, polymerization must be controlled. One type of contr... | 03/06/2007 |
| 7182136 | Methods of reducing water permeability for acidizing a subterranean formation The present invention provides a method of stimulating a subterranean formation penetrated by a well. The formation has a water-bearing section and a hydrocarbon-bearing section. The method includes the steps of: (a) introducing into the formation an aqueous treatme... | 02/27/2007 |
| 7179872 | Chain transfer agents for RAFT polymerization in aqueous media Polymers and copolymers synthesized by means that yield a narrow range of molecular weights can have different properties than polymers synthesized by conventional means. In order to obtain such polymers, however, polymerization must be controlled. One type of contr... | 02/20/2007 |
| 7159656 | Methods of reducing the permeabilities of horizontal well bore sections Methods of temporarily reducing the permeability of one or more selected sections of a subterranean formation penetrated by a horizontal well bore and the flow of water or water and hydrocarbons or hydrocarbons therefrom are provided. The methods comprise the steps ... | 01/09/2007 |
| 7122610 | Method of producing thermoplastic fluoropolymers using alkyl sulfonate surfactants Nonfluorinated surfactants selected from C7–C20 linear 1-alkanesulfonates, 2-alkanesulfones, and 1,2-alkanedisulfones are particularly effective for stabilizing emulsions in preparing non-elastomeric fluoropolymers containing at least 71 wt % vinylidene fluoride a... | 10/17/2006 |
| 7117942 | Methods useful for controlling fluid loss during sand control operations The present invention relates to methods useful during sand control operations and, more particularly, to using water-soluble relative permeability modifiers that are useful for controlling fluid loss during sand control operations. In one embodiment, the present in... | 10/10/2006 |
| 7114568 | Hydrophobically modified polymers for a well completion spacer fluid A method and composition is provided for a relative permeability modifier for use with aqueous well treatment fluids that comprises a hydrophobically modified water soluble polymer or a hydrophilically modified water soluble polymer. ... | 10/03/2006 |
| 7091159 | Compositions for and methods of stabilizing subterranean formations containing clays A composition of matter for use in stablizing shale formations in earth boreholes comprising polymeric products, e.g., polymers of a dialkyl aminoalkyl methacrylate, which can optionally be quaternized with an alkyl halide to produce drilling fluid additives which s... | 08/15/2006 |
| 7045584 | Process for the manufacture of thermally stable PVDF The present invention relates to a process for the manufacture of PVDF homopolymer or copolymer by radical polymerization of vinylidene fluoride (VDF), and optionally of a comonomer, in aqueous dispersion and in the presence of a transfer agent, of a persulphate as ... | 05/16/2006 |
| 7034079 | Radial polymers prepared by stabilized free radical polymerization A process for preparing a radial polymer comprising at least 3 polymeric arms and a central core comprising a polymerized di- or polyfunctional monomer, said process comprising the steps, (a) polymerizing at an elevated temperature... | 04/25/2006 |
| 7012122 | Process for the manufacture of thermally stable PVDF The present invention relates to a process for the manufacture of PVDF homopolymer or copolymer by radical polymerization of vinylidene fluoride (VDF), and optionally of a comonomer, in aqueous dispersion and in the presence of a transfer agent, of a persulphate as ... | 03/14/2006 |
| 7005490 | Method for making methacrylate unit-containing low-polydispersity polymers The invention pertains to a method for making a methacrylate unit-containing polymer with polydispersity | 02/28/2006 |
| 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 |
| 6870019 | Latex for dip molding and a dip molded product A latex for dip molding which comprises a latex obtained by emulsion polymerization of a monomer mixture in the presence of alkyl benzene sulfonate containing, based on 100 parts by weight of the monomer mixture, at least 10.0 parts by weight of a C13-20 ... | 03/22/2005 |
| 6855840 | Chain transfer agents for raft polymerization in aqueous media Polymers and copolymers synthesized by means that yield a narrow range of molecular weights can have different properties than polymers synthesized by conventional means. In order to obtain such polymers, however, polymerization must be controlled. One type of contr... | 02/15/2005 |
| 6852812 | Latex having a high solids content and a low viscosity and exhibiting a bimodal distribution A process is presented for the preparation of a latex by the emulsion polymerization at a temperature of between 30 and 90 C. of at least one ethylenically unsaturated monomer in the presence of at least one surfactant and of a seed of polymer particles with a diame... | 02/08/2005 |
| 6774164 | Process for producing fluoroelastomers with fluorinated anionic surfactants A novel emulsion polymerization process for the production of fluoroelastomers is disclosed wherein a partially fluorinated anionic surfactant of the formula F—(CF2CF2)n—CH2CH2SO3M, where n is an ... | 08/10/2004 |
| 6646084 | Polyacrylamide medium for the electrophoretic separation of biomolecules A polyacryalmide medium for the electrophoretic separation of biomolecules. The polyacryalmide medium comprises high molecular weight polyacrylamides (PAAm) having a viscosity average molecular weight (Mv) of about 675-725 kDa were synthesized ... | 11/11/2003 |
| 6569976 | Amphiphilic polymer composition Polymer compositions derived from selected monoethylenically unsaturated (C3 -C6)carboxylic acid monomers, (C1 -C4)alkyl (meth)acrylate ester monomers and alkoxylated (meth)acrylate monomers used in certain weig... | 05/27/2003 |
| 6555638 | Production of water-expandable styrene polymers A process for the preparation of styrene polymers containing water as the sole expanding agent by polymerization of styrene in aqueous suspension in the presence of an amphiphilic organic emulsifier which carries both hydrophilic and hydrophobic groups, o... | 04/29/2003 |
| 6512063 | Process for producing fluoroelastomers A novel emulsion polymerization process for the production of fluoroelastomers is disclosed wherein a hydrocarbon sulfonate anionic surfactant of the formula CH3 --(CH2)n --SO3 M, CH3 --(CH2 | 01/28/2003 |
| 6407187 | (Co)polymers and a novel polymerization process based on atom (or group) transfer radical polymerization A new polymerization process (atom transfer radical polymerization, or ATRP) based on a redox reaction between a transition metal (e.g., Cu(I)/Cu(II), provides "living" or controlled radical polymerization of styrene, (meth)acrylates, and other radically ... | 06/18/2002 |
| 6399702 | Butadiene polymer latex An aqueous composition that includes (A) a butadiene polymer latex that is prepared by an emulsion polymerization in the presence of a styrene sulfonate stabilizer and (B) a phenolic resin. A preferred aqueous butadiene polymer latex is one that is prepar... | 06/04/2002 |
| 6384092 | Process for the preparation of free-flowing strongly acidic cation exchangers Sulfonated strongly acidic cation exchangers are rendered free-flowing by treatment with wetting agents or water soluble initiators, washing with water at temperatures of at least 60° C. and heat drying.... | 05/07/2002 |
| 6380302 | Surfactant composition for emulsion polymerization The present invention provides a surfactant composition for emulsion polymerization. The surfactant composition for emulsion polymerization comprises a compound (a) represented by the formula (I) and having a critical micelle concentration (CMC) in the ra... | 04/30/2002 |
| 6306982 | Process for the production of general purpose PSA's General purpose inherently tacky acrylic pressure sensitive adhesive polymers formed of alkyl acrylates, vinyl esters, diesters of dicarboxylic acid and saturated carbocylic acids, having improved properties, a lower residual monomer content and a reduced... | 10/23/2001 |
| 6296783 | Gel-form solid polymer electrolyte A polymeric gel electrolyte comprising: (a) an acrylic ester polymer matrix containing structural units derived from at least one acrylic ester selected from among acrylic esters represented by the general formulae: ##STR1## (wherein, in the formula (I), ... | 10/02/2001 |
| 6281309 | Flourinated solid acids as catalysts for the preparation of hydrocarbon resins Fluorinated solid acids and supported fluorinated solid acids are used as catalysts for the polymerization of a feed stream containing at least one of pure monomer, C5 monomers, and C9 monomers to produce hydrocarbon resins. Freely-associated water may be... | 08/28/2001 |
| 6258901 | Process for producing lightly colored p-vinylphenol polymer There is provided a process for efficiently and economically producing a polymer which is superior in transmittances of visible light and far-ultraviolet light, has a high molecular weight and is light-colored. A process for producing a light-colored viny... | 07/10/2001 |
| 6235857 | Control of molecular weight and end-group functionality in polymers This invention relates to a process for the production of lower molecular weight polymers by free radical-initiated polymerization of unsaturated species characterized by the use of an unsaturated compound of Formula I as a chain transfer agent: ##ST... | 05/22/2001 |
| 6232353 | Bifunctional phenyl monophosphonic/sulfonic acid ion exchange resin and process for using the same A cross-linked water-insoluble ion exchange resin comprised of polymerized monomers having a phenyl ring is disclosed. A contemplated resin contains (i) polymerized phenyl ring-containing monomers having a phosphonic acid ligand linked to the phenyl ring,... | 05/15/2001 |
| 6214945 | Process for producing high molecular weight monovinylidene aromatic polymers and polymodal compositions The present invention is an improved process for producing high molecular weight monovinylidene aromatic polymers and polymodal compositions by free radical polymerization of a vinyl aromatic monomer in the presence of a vinyl acid, wherein the improvemen... | 04/10/2001 |
| 6172170 | Initiators for radical polymerization Initiators for free-radical addition polymerization comprising as structural feature the Diels-Alder adduct of an azo group (--N.dbd.N--) with a conjugated double bond (diene).... | 01/09/2001 |
| 6136903 | Repulpable, pressure-sensitive adhesive compositions Repulpable PSA compositions and constructions that exhibit high adhesive performance on a wide range of substrates are provided. In one embodiment, a PSA composition comprises a blend of two emulsion acrylic copolymers. The first type is a repulpable, emu... | 10/24/2000 |
