| Class / Patent application number | Description | Number of patent applications / Date published |
|---|
| 525355000 | Chemical treating agent contains hydrogen halide, elemental halogen, organic halogen-containing compound, or compound containing only halogen atoms | 32 |
| 20090292079 | Process for brominating butadiene/vinyl aromatic copolymers - Butadiene copolymers are brominated in solution using bromine as the brominating agent. The bromination is conducted in the presence of an excess of an aliphatic alcohol, relative to the amount of bromine that is used. The bromination proceeds rapidly at mild conditions, and is selective in that only aliphatic carbon-carbon double bonds are brominated, and unwanted bromination at tertiary carbon atoms is largely or completely avoided. The resulting brominated polymers are characterized in having very good thermal stability. | 11-26-2009 |
| 20130012663 | Process Technology For Recovering Brominated Styrenic Polymers From Reaction Mixtures in Which They Are Formed and/or Converting Such Mixtures into Pellets or into Granules or Pastilles - Brominated styrenic polymer is recovered from solution in a vaporizable solvent by converting the solution in a devolatilization extruder into a brominated styrenic polymer melt or flow and a separate vapor phase comprised predominately of vaporizable solvent, recovering the melt or flow from the devolatilization extruder, and allowing or causing the melt or flow to solidify. The solidified brominated styrenic polymer can be subdivided into a powder or pelletized form. Pellets so made have improved hardness and/or crush strength properties along with reduced formation of fines. Brominated anionic styrenic polymer is preferably used in the process. | 01-10-2013 |
| 20140275434 | SILICONE-CONTAINING CONTACT LENS HAVING REDUCED AMOUNT OF SILICON ON THE SURFACE - The present invention relates to a method of reducing the amount of silicon on a surface of a contact lens, wherein the method includes reacting the surface of a contact lens containing at least one silicone component with a fluoride reagent. | 09-18-2014 |
| 525356000 | Treating in the presence of elemental halogen | 14 |
| 20080227924 | Process and System Using Nitrogen Trifluoride to Fluorinate Plastic - Process and systems for the treatment of plastic with flourine proximally generated from nitrogen trifluoride decomposition. | 09-18-2008 |
| 20080287609 | PROCESS FOR PRODUCING PERFLUOROPOLYMER, PRODUCTION APPARATUS AND PROCESS FOR PRODUCING ELECTROLYTE MEMBRANE FOR POLYMER ELECTROLYTE FUEL CELLS - To provide a process for efficiently producing a perfluoropolymer having unstable terminal groups reduced, a production apparatus, and a process for efficiently producing an electrolyte membrane for polymer electrolyte fuel cells excellent in the durability. | 11-20-2008 |
| 20080293892 | Halogenation Processes - The invention discloses improved processes to halogenate polymers. In particular, the invention discloses to improved processes to halogenate polymers made from C | 11-27-2008 |
| 20090312499 | CHLORINATED ETHYLENE-BASED POLYMERS AND COMPOSITIONS AND ARTICLES PREPARED THEREFROM - The invention provides a chlorinated ethylene-based polymer, process for preparing the same, and compositions and articles prepared from the same. The chlorinated ethylene-based polymer has a low residual crystallinity, for example, less than 8 percent, a relatively high crystallization temperature, Tc, for example greater than, or equal to, 25° C., and a medium weight average molecular weight, Mw, for example, less than, or equal to, 325,000 g/mole. | 12-17-2009 |
| 20110071260 | PROCESS FOR CLEANER PRODUCTION OF CHLORINATED RUBBER WITHOUT USING CARBON TETRACHLORIDE AND WATER - The present invention relates to a green technology to produce chlorinated rubber without using carbon tetrachloride and water by using 1,1,2-trichloroethane as the solvent and iodine as the catalyst. The natural rubber reacts with an excessive amount of gaseous chlorine at 60-100° C. for 3-8 hours and the product is then dried. The method of the present invention complies with the environmental requirements of “The Montreal Protocol on Substances that Deplete the Ozone Layer” by abandoning the usage of CCl | 03-24-2011 |
| 20110136987 | Halogenation Processes - The invention discloses improved processes to halogenate polymers. In particular, the invention discloses to improved processes to halogenate polymers made from C | 06-09-2011 |
| 20120035329 | METHOD FOR PRODUCING STABILIZED FLUOROPOLYMER - The present invention is aimed to provide a highly-productive method for producing a stabilized fluoropolymer. The present invention relates to a method for producing a stabilized fluoropolymer, comprising the step of bringing a fluoropolymer to be treated into contact with a fluorinating agent to produce a stabilized fluoropolymer, while maintaining the concentration of hydrogen fluoride present in a reaction vessel at not higher than 1.0% by volume. | 02-09-2012 |
| 20130131281 | COMMON SOLVENT PROCESS FOR PRODUCING HIGH MOLECULAR WEIGHT BROMINATED RUBBER - The invention relates to an energy efficient, environmentally favourable process for the preparation of brominated rubbers, in particular bromobutyl rubber, that uses a common medium for both solution polymerization and subsequent bromination of the rubber and which further exhibits an enhanced bromine usage due to the use of a oxidizing agent. More particularly, the invention relates to a process that employs a common aliphatic medium for both solution polymerization and bromination of rubber in the presence of a brominating agent and an oxidizing agent with intermediate removal of un-reacted monomers. | 05-23-2013 |
| 20130303707 | Fluorination of Fluoropolymer Resin to Reduce Discoloration - Process for reducing thermally induced discoloration of fluoropolymer resin produced by polymerizing fluoromonomer in an aqueous medium to form aqueous fluoropolymer dispersion and isolating said fluoropolymer from said aqueous medium to obtain said fluoropolymer resin. The process comprises:
| 11-14-2013 |
| 20140309376 | PROCESS FOR REDUCING UNSTABLE END-GROUPS IN FLUORINATED POLYMERS - A process for reducing the number of unstable end-groups in a fluorinated polymer is disclosed, said process comprising reacting a fluorinated polymer comprising unstable end-groups with fluorine in the presence of at least one (per)haloolefin comprising at least one carbon-carbon double bond and having at least one fluorine or chlorine atom on either one of the carbon atoms of said double bond. The fluorinated polymer may be selected from those polymers comprising recurring units derived from at least one ethylenically unsaturated fluorinated monomer or from fluorinated polyethers. | 10-16-2014 |
| 20150141581 | Fluoropolymer Resin Treatment Employing Oxidizing Agent to Reduce Discoloration - Process for reducing thermally induced discoloration of fluoropolymer resin produced by polymerizing fluoromonomer in an aqueous dispersion medium to form aqueous fluoropolymer dispersion and isolating the fluoropolymer from the aqueous medium by separating fluoropolymer resin in wet form from the aqueous medium and drying to produce fluoropolymer resin in dry form. The process comprises:
| 05-21-2015 |
| 20150376302 | TERMINAL GROUP CONVERSION METHOD AND TERMINAL STABILIZING METHOD - To provide a terminal group conversion method and a terminal stabilizing method, which are capable of converting unstable terminal groups in a fluorinated polymer to carboxylic acid fluoride groups at a high conversion rate. A fluorinated polymer is heated at from 200 to 400° C. for at least one hour in the presence of at least 50 mol of molecular oxygen per 1 mol of unstable terminal groups in the fluorinated polymer, to convert from 50 to 100 mol % of the unstable terminal groups to carboxylic acid fluoride groups. | 12-31-2015 |
| 525357000 | Treating in the presence of a metal or metal-containing compound | 2 |
| 20140039129 | SOLVENT-FREE ENYNE METATHESIS POLYMERIZATION - The disclosure describes methods of metathesizing unsaturated organic compounds, each method comprising contacting at least one feedstock comprising at least one olefinic or acetylenic precursor with a solid transition metal-based metathesis catalyst in the absence of a liquid solvent or precursor to form a polymer product. | 02-06-2014 |
| 20160159945 | A Process For Reduction Of Residual Acidity Of Halogenated Polymer - The present disclosure provides a process for the reduction of residual acidity of halogenated polymer. The process involves treating the halogenated polymer to a physical process such as rotary vacuum drying and then neutralizing the treated halogenated polymer with alkaline metal salt solutions. The process requires less quantity of an economic neutralizing agent/base during chemical treatment, thus improving process economy without prejudicing quality of the final halogenated polymer. | 06-09-2016 |
| 525359100 | Treating in the presence of organic halogen-containing compound | 15 |
| 20110021715 | PROCESS FOR BROMINATING BUTADIENE COPOLYMERS BY THE ADDITION OF WATER OR CERTAIN SOLVENTS - Butadiene copolymers are brominated using certain quaternary ammonium tribromides as the brominating agent. The bromination process proceeds easily under mild conditions, and produces a brominated product that has excellent thermal stability. A quaternary ammonium monobromide salt is produced as a reaction by-product. A solvent for the monobromide salt is added to the reaction after 25-90% bromination of the aliphatic carbon-carbon double bonds. This provides for significantly shorter reaction times while providing a product with few impurities. | 01-27-2011 |
| 20110021716 | FLUORINE-CONTAINING ELASTOMER AND CROSSLINKABLE COMPOSITION COMPRISING SAME - The present invention provides a TFE/Pr type elastomer being excellent in not only amine resistance but also heat resistance and chemical resistance and having a small gel content, and a crosslinkable composition comprising the elastomer. The above-mentioned fluorine-containing elastomer is a fluorine-containing elastomer being crosslinkable with the compound (A), comprising 40 to 70% by mole of tetrafluoroethylene unit, 30 to 60% by mole of propylene unit and 0.1 to 2.5% by mole of a carboxyl group-containing vinyl monomer unit and having a Mooney viscosity at 121° C. of 5 to 100. | 01-27-2011 |
| 20110065868 | TWO-STEP PROCESS FOR BROMINATING BUTADIENE COPOLYMERS - Butadiene copolymers are brominated using certain quaternary ammonium tribromides as the brominating agent in a first step, and then with elemental bromine in a second bromination step. The bromination process proceeds easily under mild conditions, and produces a brominated product that has excellent thermal stability. The bromination proceeds to high conversions in shorter reaction times, when the bromination is performed using only the first bromination step. | 03-17-2011 |
| 20140121330 | PROCESS FOR BROMINATING BUTADIENE POLYMERS USING ESTER SOLVENT MIXTURES - Butadiene copolymers are brominated using certain quaternary ammonium or phosphonium tribromides as the brominating agent. The bromination is performed in solution in a mixture of n-butyl acetate and ethyl acetate. The bromination process proceeds easily under mild conditions, and produces a brominated product that has excellent thermal stability. | 05-01-2014 |
| 525359200 | Organic halogen-containing compound contains a hetero ring | 6 |
| 20110196107 | Non-Aqueous Solution Process for the Preparation of Cross-Linked Polymers - The present invention discloses a non-aqueous solution process for making cross-linked polymers. The cross-linked polymers are characterized by a repeat unit that includes at least one amino group. Amino groups can be part of the polymer backbone (e.g., polyethyleneimine), pendant from the polymer backbone (e.g., polyallylamine), or both types of amino groups can exist within the same repeat unit and/or polymer. The present invention discloses more specifically non-aqueous solution cross-linking to prepare Sevelamer and its salts, Colesevelam and its salts. | 08-11-2011 |
| 20120088886 | PROCESSES FOR THE PREPARATION OF SEVELAMER CARBONATE - Processes for preparing Sevelamer Hydrochloride and Sevelamer Carbonate are described. | 04-12-2012 |
| 20120220731 | Method of Drying A Material Having a Cohesive Phase - A method for drying a material such as a polymer hydrogel which passes through a cohesive phase as it dries is disclosed. The method comprises agitating a composition while removing liquid until the solids content of the composition reaches a level at which the composition enters a cohesive phase, halting agitation, removing liquid from the composition in the absence of agitation, and resuming agitation. Practice of the present invention can eliminate the problems associated with adhesion of a material to itself and to process equipment during the cohesive phase. | 08-30-2012 |
| 20120252982 | METHODS OF MODIFYING POLYMERS WITH HIGHLY ACTIVE AND SELECTIVE METATHESIS CATALYSTS - The present invention provides methods of depolymerizing and hydrogenating polymers using a transition metal catalyst represented by formula Ia or Ib: | 10-04-2012 |
| 20130289219 | PRESSURE-SENSITIVE ADHESIVES WITH TRIAZINE-EPOXY CROSSLINKING SYSTEM - A crosslinkable composition is described comprising an acid- and epoxy-functional copolymer, which when cross-linked with a triazine crosslinking agent provides a pressure-sensitive adhesive and pressure-sensitive adhesive articles. | 10-31-2013 |
| 20130324672 | PROCESS FOR REACTING CHEMICAL COMPOUNDS IN THE PRESENCE OF CATALYST SYSTEMS - New catalyst systems for metathesis reactions, in particular for the metathesis of nitrile rubber, are provided. | 12-05-2013 |
| 525359300 | Organic halogen-containing compound contains oxygen | 2 |
| 20100317808 | NOVEL FLUORINATED COMPOUND, FLUOROPOLYMER AND METHOD FOR PRODUCING THE COMPOUND - To provide a novel fluorinated compound, a fluoropolymer and a method for producing the compound. | 12-16-2010 |
| 20120149848 | PHOTOREACTIVE POLYMER AND METHOD FOR PREPARING THE SAME - The present invention relates to a photoreactive polymer that comprises a multi-cyclic compound in a main chain, and a polymerization method thereof. Since the photoreactive polymer according to the present invention comprises a multi-cyclic compound having a high glass transition temperature as a main chain, the thermal stability is excellent, and since the mobility of the main chain is relatively high as compared to that of an additional polymer, a photoreactive group can be freely moved in the main chain of the polymer. Accordingly, it is possible to overcome a slow photoreactive rate that is considered a disadvantage of a polymer material used to prepare an alignment film for known liquid crystal display devices. | 06-14-2012 |
| 525359500 | Organic halogen-containing compound contains only carbon, hydrogen, and halogen | 3 |
| 20100004402 | Process for brominating butadiene/vinyl aromatic copolymers - Butadiene copolymers are brominated using certain quaternary ammonium tribromides as the brominating agent. The bromination process proceeds easily under mild conditions, and produces a brominated product that has excellent thermal stability. | 01-07-2010 |
| 20130079472 | Process for Brominating Butadiene Polymers - Butadiene polymers are brominated using tetraethylammonium tribromide as the brominating agent. The bromination is performed in a solvent for the starting polymer and for the tetraethylammonium bromide that is formed as a reaction byproduct. The process proceeds easily under mild conditions. In some cases, a solution of the brominated polymer and the tetraethylammonium monobromide is produced; this solution separates into a layer that contains the brominated polymer and another layer that contains most or all of the tetraethylammonium monobromide salt. In other cases, the brominated polymer precipitates from the reaction mixture and is separated from the tetraethylammonium monobromide salt in that manner. This process therefore permits the tetraethylammonium monobromide reaction by-product to be separated easily from the brominated product, and allows aqueous washing steps to be reduced or eliminated. | 03-28-2013 |
| 20140073744 | METHOD FOR PRODUCING CHLORINATED HYPERBRANCHED POLYMER - There is provided a novel production method of a chlorinated hyperbranched polymer that is optically stable and is capable of derivatizing the chlorinated hyperbranched polymer into various compounds. A production method of a chlorinated hyperbranched polymer for producing a chlorinated hyperbranched polymer of Formula (1): | 03-13-2014 |
