Polymer Derived From Acrylonitrile Or Methacrylonitrile Monomer Patents (Class 525/329.1)
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Patent number: 6943219Abstract: The present invention provides a vinyl polymer with an epoxy group terminally introduced therein and an epoxy resin composition comprising (A) an epoxy resin and (B) a vinyl polymer which has a main chain produced by living radical polymerization and has a reactive functional group at a main chain terminus. A flexible epoxy resin composition can be obtained using these compounds. The invention further provides an epoxy resin composition having an epoxy group at a main chain terminus thereof.Type: GrantFiled: February 24, 2003Date of Patent: September 13, 2005Assignee: Kaneka CorporationInventors: Kenichi Kitano, Yoshiki Nakagawa, Masayuki Fujita
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Patent number: 6930154Abstract: A high-molecular flocculant rendered water-soluble by conversion of cyano groups contained in a high-molecular material, a method for producing the flocculant, and a method for efficiently processing water using the flocculant. A high-molecular material containing acrylonitrile as a monomer is processed safely to impart hydrophilicity to the material and the resulting product is used for water processing to contribute to environmental conservation. An amino compound is added to a cyano group containing high-molecular material to convert at least a portion of the cyano group (—C?N) into a molecular structure portion having an imidamino structure and, if necessary, to convert at, least the portion into one of an acid salt, a quaternary ammonium salt or a hydrolyzate structure portion to give a high-molecular flocculant. Alternatively, a high-molecular material having cyano groups is hydrolysed to convert the cyano group into carbamoyl groups, carboxylic groups or their salts to give a high-molecular flocculant.Type: GrantFiled: March 10, 2004Date of Patent: August 16, 2005Assignee: Sony CorporationInventors: Yasuhito Inagaki, Haruo Watanabe, Tsutomu Noguchi
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Patent number: 6890996Abstract: The present invention provides a branched polyvinyl imidazoline acid salt which, when used in waste water treatment, especially sewage treatment, forms flocs and decreases the water content of a dehydrated cake, a polymeric flocculent comprising the branched polyvinyl imidazoline acid salt, and a process for preparing the branched polyvinyl imidazoline acid salt. The branched polyvinyl imidazoline acid salt has a Huggins' constant k? of 0.2 to 1.2 and an intrinsic viscosity [?] of 2 to 20 based on measurements at 30° C. in a 0.1 mol/l aqueous solution of sodium chloride.Type: GrantFiled: May 16, 2003Date of Patent: May 10, 2005Assignee: Tosoh CorporationInventors: Toshiya Higashino, Shinji Shimosato
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Patent number: 6867263Abstract: The present invention provides a method of vulcanized bonding of heat resistant rubber. Vulcanized bonding of a hydrogenated acrylonitrile butadiene rubber (H-NBR) and an acrylic rubber (ACM) comprises a step for mixing zinc oxide (ZnO) and magnesium oxide (MgO) as acid acceptors into non-vulcanized H-NBR; and a step for the peroxide vulcanization of the H-NBR at the same time as the vulcanized bonding of the ACM, which is of an epoxy cross-linking type. Thus, hydrogenated acrylonitrile butadiene rubber (H-NBR) and acrylic rubber (ACM) are vulcanized bonded securely while also providing heat resistance.Type: GrantFiled: March 20, 2003Date of Patent: March 15, 2005Assignee: Tokai Rubber Industries, Ltd.Inventor: Shinobu Kanbe
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Patent number: 6855752Abstract: Polymers for cement dispersing admixtures, which show different performing properties in concrete are described. All polymers are based on a composition of reactants, namely a) a poly(acrylic acid), b) a polyalkyleneglycol-monoalkylether and, optionally c) a ?-amino-polyalkylene-glycol-?-alkylether and/or d) a primary or secondary amine. By keeping the composition of reactants constant and varying only the reaction time, polymers with different properties can easily be achieved. Such polymers are suitable for pre-cast, readymix or for increasing workability over time, just depending on reaction time. Polymers of the invention can be used as single polymer or in polymer blends. For this, the kinetics of the used polymer analogous condensation reaction was intensively studied. Additionally, the benefit of amines as reactant regarding stability and hydrolysis velocity of cleavable side groups was investigated.Type: GrantFiled: March 29, 2001Date of Patent: February 15, 2005Assignee: Sika Schweiz AGInventors: Ulf Velten, Ueli Sulser, Jürg Widmer, Irene Schober, Theodor A. Bürge
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Patent number: 6835780Abstract: A rubber composition comprising a nitrile rubber and incorporated therein an organic sulfonic acid salt. A vulcanized rubber article obtained by vulcanization of the rubber composition exhibits a reduced deterioration in tensile strength and elongation when kept in a hot-temperature air atmosphere.Type: GrantFiled: May 12, 2003Date of Patent: December 28, 2004Assignee: Zeon CorporationInventors: Yoshiaki Aimura, Suguru Ito
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Publication number: 20040258937Abstract: The invention relates to an adhesive based on highly saturated, carboxylated nitrile-butadiene rubber (HXNBR), to its use, to processes for its preparation, to its use for the bonding of substrates and to products manufactured therewith.Type: ApplicationFiled: June 14, 2004Publication date: December 23, 2004Inventors: Dirk Achten, Martin Hoch, Martin Mezger, Rudiger Musch, Hans-Rafael Winkelbach, Roland Parg
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Publication number: 20040254303Abstract: A single component sag-free liquid ebonite composition having silane coupling agents selected to chemically bond and convert liquid unsaturated rubber to alkoxy functionality, to consume and scavenge moisture originally present in the mixture, and to react with sulfur during vulcanization. The single component liquid ebonite composition is moisture activated and is particularly useful for coating applications in protecting metal from corrosion and chemical attack. In some embodiments, the liquid ebonite composition having a total mass percentage of 100 is mainly composed of liquid unsaturated rubber, sulfur, a vulcanization activator, a vulcanization accelerator, a first silane, a second silane, and a third silane. With the right reactive functional group, the third silane can replace the first or second silane. In some embodiments, the liquid ebonite composition includes a catalyst, carbon black, fillers, additives, and a diluent or solvent.Type: ApplicationFiled: January 27, 2004Publication date: December 16, 2004Inventors: Rong Jong Chang, Tuan Nguyenquang, Surjit Gill
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Patent number: 6828385Abstract: A process has now been discovered that permits the simultaneous crosslinking and derivation of an, optionally hydrogenated, polymer whose backbone is composed of a conjugated diene, an unsaturated nitrile and an unsaturated carboxylic acid in the presence of a coupling/condensing agent. This permits the preparation of a novel polymeric material that is an optionally hydrogenated polymer of a conjugated diene, an unsaturated nitrile and a derived unsaturated acid. It has also been found that this novel polymeric material has unexpected and valuable properties.Type: GrantFiled: October 8, 2002Date of Patent: December 7, 2004Assignee: Bayer Inc.Inventors: Janet N. Gamlin, Sharon X. Guo
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Patent number: 6812294Abstract: In one embodiment, this invention relates to a solventless liquid nitrile compound. The compound includes a liquid nitrile rubber. The compound also includes a curing agent selected from sulfur and/or sulfur donors. The curing agent is present in an amount of at least about 3% by weight of the compound. The compound contains substantially no solvent. In another embodiment, this invention relates to a solventless liquid nitrile compound. The compound includes a liquid nitrile rubber. The compound also includes a nonsulfur curing agent. The curing agent is present in an amount of at least about 5% by weight of the compound. The compound contains substantially no solvent.Type: GrantFiled: December 23, 2002Date of Patent: November 2, 2004Assignee: Freudenberg-NOK General PartnershipInventor: Paul J. Hochgesang
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Patent number: 6809158Abstract: The present invention provides: a process for producing a water-absorbing agent at low temperature in a short time, wherein the water-absorbing agent has excellent balance between the absorption capacity without load and the absorption capacity under a load, high fluidity under a hygroscopic atmosphere, and excellent safety; and a novel water-absorbing agent and a novel crosslinking agent particularly suitable for crosslinking water-absorbent resins. The water-absorbing agent, having excellent balance between the absorption capacity without load and the absorption capacity under a load, high fluidity under a hygroscopic atmosphere, and excellent safety, can be obtained by using an oxetane compound and/or an imidazolidinone compound for a water-absorbent resin.Type: GrantFiled: October 2, 2001Date of Patent: October 26, 2004Assignee: Nippon Shokubai Co., Ltd.Inventors: Hiroyuki Ikeuchi, Nobuyuki Harada, Yoshihiko Masuda
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Publication number: 20040210019Abstract: The present invention is to provide a quick curing composition having excellent curability.Type: ApplicationFiled: May 24, 2004Publication date: October 21, 2004Inventors: Nobuhiro Hasegawa, Yoshiki Nakagawa
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Patent number: 6806315Abstract: A method for preparing a weatherable thermoplastic resin, having superior weatherability and colorability and a weatherable thermoplastic resin prepared by the method are provided. The method includes preparing a seed by adding a water-soluble initiator to either an aromatic vinyl compound or a (meth)acrylic acid alkyl ester to obtain a first compound and performing polymerization with respect to the first compound; preparing an alkyl acrylate rubber polymer by adding an alkyl acrylate monomer, a first emulsifier of pH about 3 to about 9, and an oil-soluble initiator to the seed to obtain a second compound and performing polymerization with respect to the second compound; and preparing graft copolymer by adding the aromatic vinyl compound, a vinyl cyanide compound, a second emulsifier of pH about 9 to about 13, and the oil-soluble initiator to the alkyl acrylate rubber polymer to obtain a third compound and performing graft copolymerization with respect to the third compound.Type: GrantFiled: March 4, 2003Date of Patent: October 19, 2004Assignee: LG Chem, Ltd.Inventors: Yang-Hyun Shin, Keun-Hoon Yoo, Tae-Bin Ahn, Chan-Hong Lee
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Patent number: 6787611Abstract: Polymers derived from 4-acyloxystyrene are purified by fractionalization plus heating and cooling of the polymers in alcoholic solvents.Type: GrantFiled: February 24, 2003Date of Patent: September 7, 2004Assignee: Chemfirst Electronic Materials L.P.Inventor: Michael T. Sheehan
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Patent number: 6784256Abstract: A controlled free-radical polymerization process for forming end-functionalized polymers is disclosed, particularly by degenerative iodine transfer. The end-functionalized polymers are characterized by a polydispersity less than 2.5 and a predetermined molecular weight. The end-functionalized polymers are useful as reactive intermediates in condensation polymerization, chain polymerization and heterogeneous polymerization reactions.Type: GrantFiled: August 30, 2000Date of Patent: August 31, 2004Assignee: Noveon IP Holdings Corp.Inventors: Jinsong Lee, Paul Peter Nicholas, Naser Pourahmady, Rutger D. Puts
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Patent number: 6780939Abstract: The present invention relates to hydrogenated nitrile rubber polymers having lower molecular weights and narrower molecular weight distributions than those known in the art. The present invention is also related to shaped articles containing hydrogenated nitrile rubber polymers having lower molecular weights and narrower molecular weight distributions than those known in the art.Type: GrantFiled: June 10, 2002Date of Patent: August 24, 2004Assignee: Bayer Inc.Inventors: Frédéric Guérin, Sharon X. Guo, Zsolt Szentivanyi, Stephan Glander
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Publication number: 20040132912Abstract: An organic peroxide vulcanized elastomer having a tack free or low tack surface is prepared under open surface conditions by curing a composition comprising a solid elastomer, an organic peroxide initiator, and a metal carboxylate. The metal carboxylate may be dissolved in a cross-linking coagent and then blended with the elastomer prior to open surface curing. Examples of the open surface molding methods include hot air, steam, salt bath, and sand bath.Type: ApplicationFiled: July 23, 2003Publication date: July 8, 2004Inventor: Clay B. McElwee
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Publication number: 20040132891Abstract: The present invention relates to a process for the production of hydrogenated nitrile rubber polymers having lower molecular weights and narrower molecular weight distributions than those known in the art in the absence of a co-(olefin).Type: ApplicationFiled: December 4, 2003Publication date: July 8, 2004Inventors: Christopher M. Ong, Sharon X. Guo, Frederic Guerin
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Publication number: 20040132906Abstract: The present invention relates to adhesive polymer composites containing at least one nitrile rubber polymer having a Mooney viscosity (ML 1+4 @ 100° C.) below 30, optionally at least one filler and optionally at least one cross-linking agent, a process for preparing the polymer composite wherein at least one nitrile rubber polymer having a Mooney viscosity (ML 1+4 @ 100° C.) below 30, optionally at least one filler and optionally at least one cross-linking agent are mixed and a self-supporting shaped article containing the compound optionally layered on or interposed between one or more supporting means. The present invention also relates to a tape containing the adhesive polymer composite optionally layered on or interposed between one or more supporting means. Further, the present invention relates to a sealant composition containing the adhesive polymer composite.Type: ApplicationFiled: December 3, 2003Publication date: July 8, 2004Inventors: Frederic Guerin, Sharon X. Guo
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Publication number: 20040116613Abstract: A process for producing an epoxidized diene polymer includes: dispersing or suspending a diene polymer (C) having a ball-reduced particle size of 0.05-20 mm in a medium (A) in the presence of powder particles (B) insoluble in the medium (A), or in an aqueous medium in the presence of a phenol-based stabilizer and/or a phosphorus-based stabilizer; and epoxidizing the diene polymer (C) by an epoxidizing agent, therefore, problems associated with epoxidation performed by dissolving diene polymer in a solvent are eliminated; an economical method for epoxidizing, producing, and purifying a diene polymer (C) in a solid form is provided; and the epoxidized diene polymer having an excellent heat stability can be obtained.Type: ApplicationFiled: February 11, 2004Publication date: June 17, 2004Inventors: Akihiro D. Yabui, Yoshihiro Ohtsuka
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Publication number: 20040113320Abstract: The present invention relates to polymer composites comprising at least one, optionally hydrogenated, nitrile rubber polymer having a Mooney viscosity (ML 1+4 @ 100° C.) below 30 at least one filler and optionally at least one cross-linking agent, a process for preparing said polymer composite wherein at least one, optionally hydrogenated, nitrile rubber polymer having a Mooney viscosity (ML 1+4 @ 100° C.) below 30, at least one filler and optionally at least one cross-linking agent are mixed and a process for the manufacture of a shaped article comprising the step of injection molding a polymer composite comprising at least one, optionally hydrogenated, nitrile rubber polymer having a Mooney viscosity (ML 1+4 @ 100° C.) below 30, at least one filler and at least one cross-linking agent.Type: ApplicationFiled: October 14, 2003Publication date: June 17, 2004Inventor: Frederic Guerin
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Publication number: 20040097660Abstract: Hydrogenated copolymers of an unsaturated nitrile, butadiene and isoprene, wherein the molar ratio of butadiene to isoprene is less than 3:1, display valuable low temperature properties.Type: ApplicationFiled: November 18, 2003Publication date: May 20, 2004Inventors: Harald Bender, Rudolf Casper, Hans Rafael Winkelbach, Hans Christian Strauch, Paul Nguyen, Sharon X. Guo, Janet Gamlin, Rotraud Casper
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Patent number: 6736856Abstract: The invention provides a production method capable of reducing the amount of the chemical liquid (hydrazine and sodium carbonate, etc.) for applying a crosslinking treatment and a hydrolytic treatment, capable of shortening the treatment time, and capable of obtaining crosslinked acrylic moisture absorbing fibers having a sufficient moisture absorbing-moisture releasing performance and provides crosslinked acrylic moisture absorbing fibers. In the case of producing the crosslinked acrylic moisture absorbing fibers by applying a crosslinking treatment and a hydrolytic treatment to acrylic fibers, acrylic fibers made of a copolymer containing from 1 to 5% by weight a comonomer having an acidic group as a comonomer component are used as the raw material fibers to be treated.Type: GrantFiled: November 1, 2000Date of Patent: May 18, 2004Assignee: Toho Tenax Co., Ltd.Inventors: Hayashi Takahashi, Hideo Matsumoto
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Publication number: 20040034159Abstract: A rubber compound, cross-linkable with sulfur, is described, containing:Type: ApplicationFiled: January 3, 2003Publication date: February 19, 2004Inventors: Rainer Brandsch, Dick Stefan, Klaus Schurz, Rennar Nikolaus, Andreas Siedler
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Publication number: 20040030055Abstract: Polymers of a conjugated diene, an unsaturated nitrile and a vinyl aromatic compound are selectively hydrogenated to reduce ethylenic carbon-carbon double bonds, without also reducing nitrile groups and aromatic carbon-carbon double bonds, preferably using a rhodium-containing compound as catalyst. The hydrogenated polymers are novel and display valuable properties.Type: ApplicationFiled: November 7, 2002Publication date: February 12, 2004Inventor: Sharon X Guo
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Patent number: 6677405Abstract: The present invention provides: a process for producing a water-absorbing agent at low temperature in a short time, wherein the water-absorbing agent has excellent balance between the absorption capacity without load and the absorption capacity under a load, high fluidity under a hygroscopic atmosphere, and excellent safety; and a novel water-absorbing agent and a novel crosslinking agent particularly suitable for crosslinking water-absorbent resins. The water-absorbing agent, having excellent balance between the absorption capacity without load and the absorption capacity under a load, high fluidity under a hygroscopic atmosphere, and excellent safety, can be obtained by using an oxetane compound and/or an imidazolidinone compound for a water-absorbent resin.Type: GrantFiled: October 2, 2001Date of Patent: January 13, 2004Assignee: Nippon Shokubai Co., Ltd.Inventors: Hiroyuki Ikeuchi, Nobuyuki Harada, Yoshihiko Masuda
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Publication number: 20030236355Abstract: A rubber composition comprising a nitrile rubber and incorporated therein an organic sulfonic acid salt. A vulcanized rubber article obtained by vulcanization of the rubber composition exhibits a reduced deterioration in tensile strength and elongation when kept in a hot-temperature air atmosphere.Type: ApplicationFiled: May 12, 2003Publication date: December 25, 2003Inventors: Yoshiaki Aimura, Suguru Ito
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Patent number: 6653410Abstract: Disclosed is a treating method of a resin composition comprising: kneading a resin composition comprising a thermoplastic resin, 0 to 0.7 part by weight, based on 1 part by weight of the thermoplastic resin, of a treating agent having a capacity of hydrogenating a halogen and a halide, at 280 to 450° C., in the presence of a metal compound which combines with a halogen atom to generate a metal halide compound having a boiling point or sublimation point not greater than 450° C. at atmospheric pressure, to thereby convert the halide into a metal halide; and separating and collecting, from the resin composition, each of a mixture of the thermoplastic resin and the treating agent having a capacity of hydrogenating a halogen, and the metal halide. This makes it possible to treat a waste without conducting gasification or liquefaction of a resin by combustion or thermal decomposition, thereby removing and collecting the halogen such as bromine and the metal oxide therefrom in a high yield in a short time.Type: GrantFiled: December 27, 2001Date of Patent: November 25, 2003Assignee: Asahi Kasei Kabushiki KaishaInventors: Takeshi Fujisawa, Yoshiyuki Arai, Hiroshi Mikami
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Publication number: 20030204024Abstract: The present invention provides a branched polyvinyl imidazoline acid salt which, when used in waste water treatment, especially sewage treatment, forms flocs and decreases the water content of a dehydrated cake, a polymeric flocculent comprising the branched polyvinyl imidazoline acid salt, and a process for preparing the branched polyvinyl imidazoline acid salt. The branched polyvinyl imidazoline acid salt has a Huggins' constant k′ of 0.2 to 1.2 and an intrinsic viscosity [&eegr;] of 2 to 20 based on measurements at 30° C. in a 0.1 mol/l aqueous solution of sodium chloride.Type: ApplicationFiled: May 16, 2003Publication date: October 30, 2003Applicant: TOSOH CORPORATIONInventors: Toshiya Higashino, Shinji Shimosato
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Patent number: 6639048Abstract: A process for reducing the residual monomer amount in aqueous polymer dispersions comprises aftertreating with a redox initiator system.Type: GrantFiled: March 8, 2002Date of Patent: October 28, 2003Assignee: BASF AktiengesellschaftInventors: Claudia Wood, Reinhard Schneider, Eberhard Beckmann
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Patent number: 6639022Abstract: A process for the preparation of superabsorbent polymers by alkaline hydrolysis of polyacrylonitrile emulsions is disclosed. In an embodiment of the invention the process comprise preparing a PAN emulsion, subjecting the emulsion to alkaline hydrolysis, neutralizing the hydrolysate followed by drying, granulation and modifying the surface of the granular polymer by crosslinking. The process is characterized in that the isolation of the superabsorbent polymer entails neither alcohols nor organic solvents.Type: GrantFiled: April 16, 2001Date of Patent: October 28, 2003Assignee: Bayer AktiengesellschaftInventors: Gisbert Michels, Thomas Gross
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Publication number: 20030187146Abstract: The present invention provides a method of vulcanized bonding of heat resistant rubber. Vulcanized bonding of a hydrogenated acrylonitrile butadiene rubber (H-NBR) and an acrylic rubber (ACM) comprises a step for mixing zinc oxide (ZnO) and magnesium oxide (MgO) as acid acceptors into non-vulcanized H-NBR; and a step for the peroxide vulcanization of the H-NBR at the same time as the vulcanized bonding of the ACM, which is of an epoxy cross-linking type. Thus, hydrogenated acrylonitrile butadiene rubber (H-NBR) and acrylic rubber (ACM) are vulcanized bonded securely while also providing heat resistance.Type: ApplicationFiled: March 20, 2003Publication date: October 2, 2003Applicant: TOKAI RUBBER INDUSTRIES, LTD.Inventor: Shinobu Kanbe
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Publication number: 20030176587Abstract: The present invention is directed to a nitrile polymer vulcanizate having improved hot air aging characteristics. The nitrile polymer vulcanizate may be produced by admixing a composition containing: (i) a nitrile polymer; (ii) a filler; (iii) a metal salt of a secondary amine; (iv) a vulcanization system; and optionally (v) an additive selected from the group consisting of a strong base, a salt of a strong base and a weak acid, a salt of a weak acid, a carbodiimide, a polycarbodiimide and mixtures thereof.Type: ApplicationFiled: January 28, 2003Publication date: September 18, 2003Inventors: Frederic Guerin, Judy Hannay, Ezio Campomizzi, Harald Bender
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Publication number: 20030171500Abstract: Polymers of a conjugated diene, an unsaturated nitrile and an &agr;,&bgr;-unsaturated carboxylic acid are selectively hydrogenated to reduce carbon-carbon double bonds, without also reducing carboxyl groups and nitrile groups, using a rhodium-containing compound as catalyst. The hydrogenated polymers are novel and display excellent adhesive properties at both room temperature and high temperature, excellent hot tear strength, and excellent abrasion resistance.Type: ApplicationFiled: March 19, 2003Publication date: September 11, 2003Inventors: Sharon X. Guo, Harald Bender
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Patent number: 6617390Abstract: The present invention involves a method of making a multiblock copolymer containing two or more types of sequences of derivatives of acrylic acid with at least one derivative being acrylic acid salt and at least one being acrylamide. The method includes: (e) in sequence, a first step being a catalytic reaction of nitrile groups in polyacrylonitrile dissolved in an inorganic aqueous solvent of polyacrylonitrile; and, (f) at least one subsequent step being at least one catalytic reaction of nitrile groups in absence of polyacrylonitrile solvents. The present invention also pertains to the products resulting from the method.Type: GrantFiled: July 11, 2002Date of Patent: September 9, 2003Assignee: Replication Medical, Inc.Inventors: Vladimer A. Stoy, Petr Stehlicek, Zdena Kozlova, Tomas Drunecky
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Publication number: 20030166789Abstract: A vulcanizable nitrile rubber composition comprising 100 parts by weight of a nitrile rubber, 0.1 to 20 parts by weight of a metal silicate and 0.1 to 10 parts by weight of a vulcanizing agent. Vulcanization of this vulcanizable rubber composition gives a vulcanizate exhibiting enhanced heating aging resistance when it is kept in a hot air atmosphere, especially at a high temperature.Type: ApplicationFiled: March 6, 2003Publication date: September 4, 2003Inventors: Yoshiaki Aimura, Suguru Ito
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Patent number: 6610787Abstract: The present invention relates to a thermoplastic resin composition comprising a rubber-reinforced thermoplastic resin as component (A) and an ethylene-&agr;-olefin copolymer having a Mooney viscosity (ML1+4, 100° C.) of 40 to 110 as component (B), the amount of component (B) being 1 to 70 parts by weight based on 100 parts by weight of component (A).Type: GrantFiled: June 13, 2002Date of Patent: August 26, 2003Assignee: Techno Polymer Co., Ltd.Inventors: Shinji Isoda, Narito Ishiga, Hironari Muraki, Yuuji Nakagawa
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Patent number: 6608166Abstract: A three dimensional copolymer network of polyphenylene ether segments and styrenic resins such as styrene/acrylonitrile copolymers provide articles of high heat reesistance and dielectric properties suitable for use in electronic components. Methods for preparing the copolymers employ polyphenylene ether polymers with end caps having at least one pair of unsaturated aliphatic carbon atoms, i.e. carbon-carbon double bond, and polymerize styrene monomers and acrylonitrile monomers or styrene/acrylonitrile copolymers or both in the presence of these polyphenylene ether polymers.Type: GrantFiled: August 30, 2001Date of Patent: August 19, 2003Assignee: General Electric CompanyInventors: Hua Guo, Manuel Cavazos, John B. Yates, III
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Patent number: 6605672Abstract: There is provided an excellent impact modifier for a vinyl chloride resin. There is used, as an excellent impact modifier, a copolymer which is prepared by polymerizing 10 to 70% by weight of a monomer or monomers containing 60 to 100% by weight of at least one vinyl monomer selected from the group consisting of a (meth)acrylate compound, an aromatic vinyl compound, a vinyl cyanide compound and vinyl chloride, and 0 to 40% by weight of the other monomer copolymerizable therewith, in the presence of 30 to 90% by weight of a hollow rubber particle of which glass transition temperature Tg is at most 0° C. and a void ratio is 3 to 90% by volume in a latex state, and which contains a cross linking agent in an amount of 0.1 to 5 parts by weight based on 100 parts by weight of the total rubber component monomer.Type: GrantFiled: June 6, 2001Date of Patent: August 12, 2003Assignee: Kaneka CorporationInventors: Akira Takaki, Toshio Mizuta, Tomomichi Hashimoto, Toshiyuki Mori
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Patent number: 6590040Abstract: A process for producing a superabsorbent polymer is described. The process that entails a continuous hydrolysis of an aqueous emulsion of crosslinked or uncrosslinked polyacrylonitrile in the form of fine particles is carried out in a cascade of stirred tanks. The reaction with alkali-hydroxide solution an aqueous-alcoholic medium at 60 to 100° C. yields polymers that are suitable for the preparation of hygiene products, water-storing materials in agriculture, and sheathing of electrical cables.Type: GrantFiled: June 11, 2001Date of Patent: July 8, 2003Assignee: Bayer AktiengesellschaftInventors: Günter Sackmann, Rolf-Volker Meyer, Sergei Schapowalow, Telman Bayburdov, Jgor Nakonetschny
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Process for the preparation of superabsorbent polymers from polyacrylonitrile precipitation polymers
Patent number: 6573358Abstract: A process for the preparation of superabsorbers is disclosed. The process entails subjecting a polyacrylonitrile precipitation polymer alkaline hydrolysis to obtain a hydrolysis product. The hydrolysate that may optionally be neutralized is dried and ground and optionally modified by crosslinking of its surface. The inventive superabsorber is suitable for the preparation of nappies, incontinence articles, water-storage materials and electric cable coverings.Type: GrantFiled: April 16, 2001Date of Patent: June 3, 2003Assignee: Bayer AktiengesellschaftInventors: Gisbert Michels, Günter Sackmann, Klaus Struss -
Publication number: 20030069364Abstract: Ethylene copolymer elastomer compositions, acrylate rubber compositions, nitrile rubber compositions, fluoroelastomer compositions, and chlorinated olefin elastomer compositions are provided which are curable by exposure to UV radiation. The compositions are particularly suited for production of elastomeric seals using hot melt equipment and a gasketing in place technique.Type: ApplicationFiled: September 20, 2002Publication date: April 10, 2003Inventors: Patrick Luigi Paglia, Christian Ruepping
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Publication number: 20030045646Abstract: A process for preparing a composition including microspheres comprising adding a rubber polymer, a sulfur-based curing agent, and microspheres to a rubber mill mixer and mixing the added materials in the rubber mix to form a composition, wherein the composition comprises less than about 40% solvent. The process is useful for preparing formulations that can be used with printing blanket compressible layers. The microspheres are not adversely affected by the mixing.Type: ApplicationFiled: July 10, 2002Publication date: March 6, 2003Inventors: Ronald M. Buono, Joseph Carl Kalchbrenner, Stefano Carletti, Giorgio Donida Maglio, Gianpietro Invernizzi
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Publication number: 20030036607Abstract: Process for the preparation of a hydrogenated polymer composed of conjugated diene monomer units and monomer units containing a nitrile group, wherein the hydrogenation is carried out in the presence of hydrazine, an oxidizing compound and a metal compound as catalyst, a metal compound containing a metal atom in an oxidation state of at least 4 being used as catalyst.Type: ApplicationFiled: July 26, 2002Publication date: February 20, 2003Inventors: Johannes Wilhelmus Belt, Marcus Matheus Driessen
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Publication number: 20020193531Abstract: The present invention involves a method of making a multiblock copolymer containing two or more types of sequences of derivatives of acrylic acid with at least one derivative being acrylic acid salt and at least one being acrylamide.Type: ApplicationFiled: July 11, 2002Publication date: December 19, 2002Applicant: REPLICATION MEDICAL, INC.Inventors: Vladimir A. Stoy, Petr Stehlicek, Zdena Kozlova, Tomas Drunecky
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Publication number: 20020151657Abstract: Disclosed is a process for crosslinking copolymers of acrylic esters by converting some of the ester groups to ester or amide groups which contain unsaturation, and then sulfur or peroxide curing the resulting polymers. The resulting crosslinked polymers often have excellent vulcanizate properties, and are useful especially in elastomeric form as seals and gasket.Type: ApplicationFiled: April 5, 2002Publication date: October 17, 2002Inventors: Gordon Mark Cohen, Edward Johnson Deyrup, Jerald Rice Harrell
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Patent number: 6462138Abstract: A process is described for reducing the residual monomer content in a liquid solution, mixture, melt, suspension or dispersion of a polymer by postpolymerization with addition of a redox initiator system at a reaction temperature appropriate to it and with an extremely short mixing time of the liquid system in the production reactor by metering—gradually, in portions or continuously—at least one of the redox initiator components required to initiate polymerization of the residual monomers over a period (metering time) which is from about 10 to 250 times the mixing time of the liquid system in said reactor.Type: GrantFiled: March 15, 2000Date of Patent: October 8, 2002Assignee: BASF AktiengesellschaftInventors: Robert Rupaner, Sven Lawrenz, Johannes Dobbelaar, Gerhard Bauer, Franz-Josef Mueseler, Werner Kirchner, Bradley Ronald Morrison, Jürgen Nahstoll, Martin Meister, Reinhard Bächer, Wolfgang Hübinger, Gerhard Schumacher
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Publication number: 20020143109Abstract: The invention relates to a process for preparing stable gel-type cation exchangers by sulfonating acrylonitrile-containing bead polymers, to the gel-type cation exchangers themselves, and to their uses.Type: ApplicationFiled: October 9, 2001Publication date: October 3, 2002Inventors: Wolfgang Podszun, Glandia Schmid, Rudiger Seidel, Reinhold Klipper
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Publication number: 20020132929Abstract: There is disclosed a rubber composition comprising:Type: ApplicationFiled: February 18, 2002Publication date: September 19, 2002Inventors: Marc Weydert, Wolfgang Lauer, Friedrich Visel, Rene Jean Zimmer, Francois Kayser
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Patent number: 6451922Abstract: The present invention involves a method of making a multiblock copolymer containing two or more types of sequences of derivatives of acrylic acid with at least one derivative being acrylic acid salt and at least one being acrylamide. The method includes: (e) in sequence, a first step being a catalytic reaction of nitrile groups in polyacrylonitrile dissolved in an inorganic aqueous solvent of polyacrylonitrile; and, (f) at least one subsequent step being at least one catalytic reaction of nitrile groups in absence of polyacrylonitrile solvents.The present invention also pertains to the products resulting from the method.Type: GrantFiled: April 19, 2001Date of Patent: September 17, 2002Assignee: Replication Medical, Inc.Inventors: Vladimer A. Stoy, Petr Stehlicek, Zdena Kozlova, Tomas Drunecky