In Presence Of Water Patents (Class 525/246)
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Patent number: 8933185Abstract: An acrylic resin that can have excellent transparency, flowability and scratch-resistance property is prepared by polymerizing a monomer mixture comprising about 10 to about 25% by weight of (meth)acrylic acid alkyl ester monomer, about 50 to about 80% by weight of aromatic vinyl compound, and about 10 to about 25% by weight of vinyl cyanide compound.Type: GrantFiled: June 27, 2012Date of Patent: January 13, 2015Assignee: Cheil Industries Inc.Inventors: Don Keun Lee, Yu Ho Kim
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Patent number: 8722812Abstract: An object of the present invention is to provide an inorganic-organic hybrid particle which has a structure where an organic material composed of two or more different components forms separate phases, wherein an inorganic material is included in the phase, and a method for producing the inorganic-organic hybrid particle. The above object is solved by an inorganic-organic hybrid particle which has a structure where an organic material composed of two or more different components forms separate phases, wherein one or more inorganic materials are included in at least one phase.Type: GrantFiled: February 12, 2010Date of Patent: May 13, 2014Assignee: Japan Science and Technology AgencyInventors: Hiroshi Yabu, Takeshi Higuchi, Kiwamu Motoyoshi, Kazutaka Koike
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Patent number: 8546481Abstract: An aqueous dispersion containing a graft copolymer satisfying (a) to (e) and water: (a) a graft rate is 1 to 150% by mass, (b) a weight average molecular weight is 500 to 400000, (c) a molecular weight distribution is 1.5 to 4, (d) a main chain containing a monomer unit having a hydrophilic group and (e) an ?-olefin homopolymerization or ?-olefin/ethylene copolymerization side chain, wherein a mesopentad ratio [mmmm] of the polymerization chain is 30 to 80 mole %.Type: GrantFiled: January 27, 2009Date of Patent: October 1, 2013Assignee: Idemitsu Kosan Co., Ltd.Inventors: Shuji Machida, Takenori Fujimura, Ryo Aburatani
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Patent number: 8507604Abstract: A graft copolymer satisfying (a) to (e): (a) a main chain derived from one or more monomers selected from (I) an acrylic acid, (II) a methacrylic acid, (III) a vinyl ester, (IV) a styrene and (V) a vinyl group-containing silane compound, at least one kind of the monomer having a crosslinkable functional group, (b) a side chain derived from a reactive homopolymer ?-olefin having a meso pentad fraction (mmmm) of from 30 to 80% by mol or a copolymer of 50% by mass or more of at least one ?-olefin, (c) a graft ratio of from 1 to 150% by mass, (d) a weight average molecular weight of from 500 to 400,000, and (e) a molecular weight distribution (Mw/Mn) of from 1.5 to 4.Type: GrantFiled: March 12, 2009Date of Patent: August 13, 2013Assignee: Idemitsu Kosan Co., Ltd.Inventors: Takenori Fujimura, Ryo Aburatani, Shuji Machida, Shinichi Nakamura
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Patent number: 8232353Abstract: A polymer film substrate is irradiated with ions to make a large number of nano-sized through-holes and the substrate may be further irradiated with ionizing radiation so that a functional monomer may be grafted or co-grafted onto a surface of the film and within the holes; in addition, sulfonic acid group(s) may be introduced into the graft chains to produce a polymer ion-exchange membrane that may have high oxidation resistance, dimensional stability, electrical conductivity and/or methanol resistance, as well as may have an ion-exchange capacity controlled over a wide range.Type: GrantFiled: August 21, 2007Date of Patent: July 31, 2012Assignee: Japan Atomic Energy Research InstituteInventors: Masaru Yoshida, Tetsuya Yamaki, Masaharu Asano, Yosuke Morita
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Patent number: 7943704Abstract: The present invention provides a process for preparing emulsion polymer particles of a hollow core/shell structure in the presence of a monomer plasticizer having a ceiling temperature less than 181° C. wherein a polymerization inhibitor or reducing agent is not added to the aqueous emulsion of the core shell particles during the neutralization and swelling stage. The obtained core shell particles are useful in paints, paper coatings, foams, and cosmetics.Type: GrantFiled: July 10, 2006Date of Patent: May 17, 2011Assignee: BASF AktiengesellschaftInventors: Konrad Roschmann, Arno Tuchbreiter, Ekkehard Jahns, Joerg Leuninger, Bernhard Schuler, Oliver Wagner, Michaela Reinsch, Robert Wrazidlo
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Patent number: 7371798Abstract: A thermoplastic water-curable composition which is excellent in mechanical properties, heat resistance, dimensional stability, and moldability and from which a mechanical part of a complicated shape can be produced: a molding formed from the thermoplastic water-curable composition; and a process for producing the molding. The thermoplastic water-curable composition comprises: a thermoplastic resin which upon contact with water undergoes a cross-linking reaction and thus comes to have a high molecular weight, desirably one having silane groups in inner parts thereof and a water-curable composition, the amount of water-curable composition being desirably 200 to 700 parts by weight per 100 parts by weight of the resin The molding is formed from the thermoplastic water-curable composition. The process comprises molding the thermoplastic water-curable composition into a given shape and then bringing the molding into contact with water to age and cure it.Type: GrantFiled: December 12, 2002Date of Patent: May 13, 2008Assignee: Sumitomo Osaka Cement Co., Ltd.Inventors: Satoshi Ozawa, Kouji Mikami, Shigefumi Hisatsune
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Patent number: 7335703Abstract: A novel polyolefin graft copolymer prepared by graft-copolymerizing an olefin monomer with a (meth)acryl macromonomer or an isobutylene macromonomer in the presence of a coordination polymerization catalyst based on a late transition metal complex and a method for making the novel polyolefin graft copolymer are provided.Type: GrantFiled: August 7, 2002Date of Patent: February 26, 2008Assignee: Kaneka CorporationInventor: Yoshifumi Fukui
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Patent number: 7300984Abstract: A process for preparing a graft copolymers is provided comprising exposing a polymeric base material to a dose of ionizing radiation, and then contacting the irradiated base material with a microemulsion comprising at least one fluorostyrenic monomer, water and water-miscible solvent. The graft copolymer may be formed into a membrane, including ion exchange membranes.Type: GrantFiled: November 3, 2004Date of Patent: November 27, 2007Assignee: Ballard Power Systems Inc.Inventor: Sean M MacKinnon
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Patent number: 7282540Abstract: A process of producing particles for diagnostic reagent, including forming a matrix particle by mixing a nuclear particle having a CV value of 20% or less and a magnetic substance containing at least one of Fe2O3 and Fe3O4 and giving a shear force to the mixture to adsorb the magnetic substance on the surface of the nuclear particles; and polymerizing a polymerizable monomer in the presence of said matrix particle to form a polymer layer on the magnetic substance layer.Type: GrantFiled: September 15, 2004Date of Patent: October 16, 2007Assignee: JSR CorporationInventors: Ichirou Ozaki, Satoshi Katayose, Mikio Hikata, Kejun Fan, Mitsuhiro Murata
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Patent number: 7276561Abstract: A polymer film substrate is irradiated with ions to make a large number of nano-sized through-holes and the substrate is further irradiated with an ionizing radiation so that a functional monomer is grafted or co-grafted onto a surface of the film and within the holes; in addition, the sulfonic acid group is introduced into the graft chains, thereby producing a polymer ion-exchange membrane that has high oxidation resistance, dimensional stability, electrical conductivity and methanol resistance, as well as an ion-exchange capacity controlled over a wide range.Type: GrantFiled: August 6, 2004Date of Patent: October 2, 2007Assignee: Japan Atomic Energy Research InstituteInventors: Masaru Yoshida, Tetsuya Yamaki, Masaharu Asano, Yosuke Morita
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Patent number: 6991741Abstract: A method of room temperature synthesis of magnetic metal oxide nanoclusters within a diblock copolymer matrix includes the step of synthesizing, by ring opening metathesis polymerization technique, a diblock copolymer having a repeat unit ratio m/n, introducing, at room temperature, one or several metal containing precursors into the one block of the diblock copolymer, and processing the metal containing diblock copolymer by wet chemical technique to form nanoclusters of the metal(s) oxide within the diblock copolymer matrix. Specific reaction for synthesis of CoFe3O4 and Co3O4 nanoclusters within diblock copolymers, such as [NOR]m/[NORCOOH]n and [NOR]m/[CO(bTAN)]n, respectively is used in the method of the present invention.Type: GrantFiled: November 29, 2002Date of Patent: January 31, 2006Assignee: University of MarylandInventors: Steven Bullock, Sufi Rizwan Ahmed, Peter Kofinas
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Patent number: 6831142Abstract: The invention relates to absorptive, crosslinked polymers which are based on partly neutralized, monoethylenically unsaturated monomers carrying acid groups, and have improved properties, in particular in respect of their capacity for transportation of liquids in the swollen state, and which have been after-crosslinked on their surface at temperatures of at least 150° C. with a combination of polyol as after-crosslinking compound and a cation in the form of an aqueous solution.Type: GrantFiled: March 4, 2003Date of Patent: December 14, 2004Assignee: Stockhausen GmbH & Co. KGInventors: Richard Mertens, Harren Jörg
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Patent number: 6828386Abstract: A process for preparing a graft copolymers is provided comprising exposing a polymeric base material to a dose of ionizing radiation, and then contacting the irradiated base material with a microemulsion comprising at least one fluorostyrenic monomer, water and water-miscible solvent. The graft copolymer may be formed into a membrane, including ion exchange membranes.Type: GrantFiled: September 20, 2002Date of Patent: December 7, 2004Assignee: Ballard Power Systems Inc.Inventor: Sean M. MacKinnon
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Patent number: 6797782Abstract: A process of producing particles for diagnostic reagent, including a step of polymerizing a polymerizable monomer in the presence of a matrix particle having a magnetic substance layer containing at least one of Fe2O3 and Fe3O4 on the surface thereof and having a mean particle size of 0.4-200 &mgr;m to form a polymer layer on the magnetic substance layer.Type: GrantFiled: March 21, 2003Date of Patent: September 28, 2004Assignee: JSR CorporationInventors: Ichiro Ozaki, Satoshi Katayose, Mikio Hikata, Kejun Fan, Mitsuhiro Murata
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Patent number: 6765052Abstract: An olefin type thermoplastic elastomer which satisfies the following formulae (I) to (III): Y≦−2X+350 (I) X<95 (II) Z≦150 (III) where X, Y and Z are as follows: X: JIS A hardness of a molded product as measured in accordance with JIS K6253 (no unit); Y: rate of change in the weight of a molded product measured based on JIS K6258 using IRM903 oil at 120° C. (unit: %); and Z: number of granular structures on an extruded sheet surface (250 mm×1,500 mm) (unit: granular structures).Type: GrantFiled: November 12, 2002Date of Patent: July 20, 2004Assignee: Mitsubishi Chemical CorporationInventors: Gakuji Shin, Tatsumi Tsuji
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Patent number: 6531523Abstract: A beaded polymeric adsorbent has a core part; a shell part arranged around the core part, with one of the parts having a lipophilic property and another of the parts having a hydrophilic property, and is produced by preparing an organic phase composed of water insoluble monounsaturated and poly unsaturated comonomers; preparing an aqueous phase composed of a mixture of water soluble monounsaturated and polyunsaturated comonomers; forming a dispersion of the organic phase and the aqueous phase in a single vessel; and creating conditions for first polymerizing of one of the phases which forms the core part and thereafter polymerizing the other of the phases which forms the shell part.Type: GrantFiled: October 10, 2000Date of Patent: March 11, 2003Assignee: Renal Tech International, LLCInventors: Vadim Davankov, Maria Tsyurupa, Ludmila Pavlova
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Patent number: 6459005Abstract: The present invention intends to provide an ethylene/&agr;-olefin copolymer of specific structure, exhibiting excellent performance as a lubricant oil additive, capable of having various functional groups in high ratio, and serviceable as raw material for various solubilizing agents. The ethylene/&agr;-olefin copolymer of the present invention is composed of ethylene and an &agr;-olefin having 3 to 10 carbon atoms, and characterized by specific characteristics.Type: GrantFiled: April 7, 2000Date of Patent: October 1, 2002Assignee: Mutsui Chemicals, Inc.Inventors: Hideki Hirano, Terunori Fujita, Junji Saito, Makoto Mitani
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Patent number: 6441097Abstract: The present invention is directed to a crosslinkable polymer composition comprising an alkoxysilane functional polyolefin and a silanol crosslinking catalyst selected from the group consisting of: (i) an alkylated naphthalene monosulfonic acid substituted with 1-4 alkyl groups wherein each alkyl group is a linear or branched alkyl with 5-20 carbons with each alkyl group being the same or different, wherein the total number of carbons in the alkyl groups is in the range of 20 to 80 carbons; (ii) an arylalkyl sulfonic acid wherein the aryl is phenyl or naphthyl and is substituted with 1-4 alkyl groups wherein each alkyl group is a linear or branched alkyl with 5-20 carbons with each alkyl group being the same or different, and wherein the total number of carbons in the alkyl groups is in the range of 12-80; (iii) a derivative of (i) or (ii) selected from the group consisting of an anhydride, an ester, an acetylate, an epoxy blocked ester and an amine salt thereof which is hydrolyzable to the corresponding alType: GrantFiled: July 19, 2001Date of Patent: August 27, 2002Assignee: King Industries, Inc.Inventors: Werner J. Blank, Edward T. Hessell, Richard A. Abramshe
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Patent number: 6395837Abstract: The present invention is directed to a highly active condensation catalyst suitable for the crosslinking of alkoxysilanyl polyolefins, e.g.Type: GrantFiled: July 19, 2001Date of Patent: May 28, 2002Assignee: KIng Industries, Inc.Inventors: Werner J. Blank, Edward T. Hessell, Richard A. Abramshe
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Patent number: 6262195Abstract: A multi-stage process for preparing ethylene (co)polymers having broad molecular weight distributions is disclosed, said process comprising: (A) a first polymerization stage in which, in the presence of a Ti or V catalyst, a first ethylene polymer is prepared; (B) a treatment stage in which the catalyst used in the first stage is deactivated and in which a bridged bis-2-indenyl zirconocene is supported on the ethylene polymer produced in stage (A), optionally in the presence of a suitable cocatalyst; and (C) a second polymerization stage in which ethylene is polymerized in the presence of the product obtained from stage (B). Furthermore, polyethylene obtainable by the above process is disclosed, having intrinsic viscosity ranging from 0.5 to 6 dl/g, Mw/Mn>8 and cold xylene solubility<1.2% wt.Type: GrantFiled: March 9, 1999Date of Patent: July 17, 2001Assignee: Montell Technology Company bvInventors: Tiziano Dall'Occo, Giovanni Baruzzi, Colin J. Schaverien
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Patent number: 6183863Abstract: An adhesive ethylene copolymer resin composition blend of a modified ethylene/&agr;-olefin copolymer obtained by graft-modifying an unmodified linear ethylene/&agr;-olefin copolymer comprising ethylene and an a-olefin of 3 to 20 carbon atoms with an unsaturated carboxylic acid or its derivative, or the unmodified ethylene/&agr;-olefin copolymer and the modified ethylene/&agr;-olefin copolymer and an olefin elastomer (F) The linear ethylene/&agr;-olefin copolymer being prepared by the use of an olefin polymerization catalyst including a Group IV transition metal compound (a) containing a ligand having cyclopentadienyl skeleton and an organoaluminum oxy-compound (b). The adhesive ethylene copolymer resin composition can be used as a layer to form a laminate with a layer of a polar material or a layer of a metal. The polar material layer can be a layer of an ethylene/vinyl alcohol copolymer, a layer of a polyamide or a layer of a polyester.Type: GrantFiled: May 12, 1997Date of Patent: February 6, 2001Assignee: Mitsui Chemical IncInventors: Hideshi Kawachi, Yuji Sawada, Haruhiko Tanaka
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Patent number: 6140408Abstract: This invention relates to novel room temperature coalescable aqueous fluoropolymer dispersions and a process for their manufacture. These dispersions may be used in a variety of applications including high temperature thermoplastic coatings, polishes, room temperature formable paints and coatings, extrudable or injection moldable resins, and adhesives.Type: GrantFiled: December 9, 1998Date of Patent: October 31, 2000Inventors: Thomas F. McCarthy, Yan Chen, Peter Petersen
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Patent number: 6110880Abstract: A viscosity modifier comprising a low molecular weight block copolymer including A blocks and B blocks, wherein the A blocks comprise at least about 93 wt. % polyethylene and the B blocks comprise a copolymer of between about 40 wt. % to 75 wt. % ethylene and at least one other .alpha.-olefin; wherein the resulting block copolymer has an average ethylene content of between about 60 wt. % to 80 wt. %.Type: GrantFiled: June 24, 1997Date of Patent: August 29, 2000Assignee: Exxon Chemical Patents IncInventors: Gary William Verstrate, Charles Cozewith, Thomas John Pacansky, William Myers Davis, Pratima Rangarajan
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Patent number: 6080815Abstract: The present invention relates to a process for producing a thermoplastic resin having high impact strength and good surface gloss, which comprises graft copolymerizing at least a vinyl cyanide compound and at least an aromatic vinyl compound for a short period of less than about 3 hours in the presence of rubber latex having high gel content. The rubber latex can be a mixture of two or more rubber latices having different particle size. The graft copolymer has the characteristics such that the degree of the inner occlusion into the resin is decreased and the degree of surface grafting is increased. Thereby, the resulted thermoplastic resin has a very high impact strength and good surface gloss, and the processability is greatly improved. In addition, when the graft copolymer is polymerized the level of coagulum formation is greatly decreased.Type: GrantFiled: June 10, 1998Date of Patent: June 27, 2000Assignee: LG Chemical LimitedInventors: Chang-Hong Lee, Young-Min Kim, Jin-Nyoung Yoo
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Patent number: 6028140Abstract: Homopolymers or copolymers obtained by a multistage process of olefins having the formula CH.sub.2 .dbd.CHR, in which R is hydrogen or R has from 1 to 10 carbon atoms and is an alkyl, cycloalkyl or aryl group, the process comprising:(A) a first stage of polymerization in which one or more of the olefins are polymerized in the presence of a titanium or vanadium catalyst;(B) a treatment stage in which the product obtained in the first stage of polymerization (A) is brought into contact with a compound capable of deactivating the catalyst present in the stage (A); and also brought into contact with a compound of a transition metal M selected from the group consisting of Ti, Zr, V, or Hf containing at least one M-.pi. bond and optionally with an alkyl-Al compound; and(C) a second stage of polymerization in which one or more of the olefins are polymerized, in one or more reactors, in the presence of the product obtained in treatment stage (B).Type: GrantFiled: May 29, 1997Date of Patent: February 22, 2000Assignee: Montell Technology Company B.V.Inventors: Gianni Collina, Tiziano Dall'occo, Maurizio Galimberti, Enrico Albizzati, Luciano Noristi
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Patent number: 5817707Abstract: A graft copolymer of a propylene polymer material is prepared by (1) making an oxidized propylene polymer material by (a) irradiating a porous particulate propylene polymer material in the substantial absence of oxygen, (b) exposing the irradiated propylene polymer material to a controlled amount of oxygen of greater than 0.004% but less than 15% by volume at a temperature of 40.degree. C. to 110.degree. C., and (c) heating the irradiated polymer material to a temperature of at least 110.degree. C. in the presence of a controlled amount of oxygen within the same range as is used in the previous step, (2) dispersing the resulting oxidized propylene polymer material in water in the presence of a surfactant at a temperature of 30.degree. C.-90.degree. C., (3) adding (a) a primary reducing agent, (b) a chelating agent, and (c) a secondary reducing agent, (4) adding at least one vinyl monomer, and (5) recovering the graft copolymer from the reaction mixture.Type: GrantFiled: May 6, 1996Date of Patent: October 6, 1998Assignee: Montell North America Inc.Inventors: Anthony J. DeNicola, Jr., Abuzar Syed
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Patent number: 5688865Abstract: A process and system for prevention of fouling of pressure taps in a first gas phase fluidized bed polymerization reactor while avoiding sheeting during production of polyolefins in a second downstream gas phase fluidized bed polymerization reactor wherein a relatively small amount of water is added directly to the pressure taps of the first reactor.Type: GrantFiled: September 4, 1992Date of Patent: November 18, 1997Assignee: Mobil Oil CorporationInventors: Ahmed H. Ali, Robert O. Hagerty
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Patent number: 5648422Abstract: Multistage process for the polymerization of one or more olefins of the formula CH.sub.2 .dbd.CHR, in which R is hydrogen or an alkyl, cycloalkyl or aryl group having from 1 to 10 carbon atoms, comprising:(A) a first stage of polymerization, in which a first olefin polymer is prepared in the presence of titanium catalyst or vanadium catalyst;(B) a treatment stage in which the catalyst used previously is deactivated and in which a metallocene compound is supported on the olefin polymer produced in stage (A); and(C) a second stage of polymerization in which one or more olefins are polymerized in the presence of the product obtained from stage (B).Type: GrantFiled: June 5, 1995Date of Patent: July 15, 1997Assignee: Montell Technology Company bvInventors: Gianni Collina, Tiziano Dall'Occo, Maurizio Galimberti, Enrico Albizzati, Luciano Noristi
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Patent number: 5599854Abstract: 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 reduced polymerization time results with no loss in properties of the product. The process further includes agglomeration of the rubbery polymer to increase particle size during the polymerization process.Type: GrantFiled: November 16, 1995Date of Patent: February 4, 1997Assignee: Rohm and Haas CompanyInventors: Edward J. Troy, Anibal Rosado
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Patent number: 5556921Abstract: This invention is directed to a fast curing polymer composition which does not require baking or thermosetting to provide a cross-linked coating binder. The composition comprises a polymer which is a homopolymer or copolymer of alpha, beta unsaturated monomers having pendent acetylenic groups which cross-link upon air drying to provide a coating binder.Type: GrantFiled: February 14, 1994Date of Patent: September 17, 1996Assignee: Eastern Michigan UniversityInventors: Stoil Dirlikov, Zhao Chen
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Patent number: 5534594Abstract: 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 reduced polymerization time results with no loss in properties of the product. The process further includes agglomeration of the rubbery polymer to increase particle size during the polymerization process.Type: GrantFiled: December 5, 1994Date of Patent: July 9, 1996Assignee: Rohm and Haas CompanyInventors: Edward J. Troy, Anibal Rosado
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Patent number: 5525678Abstract: A bimetallic catalyst produces broad or bimodal molecular weight distribution polyolefin resin whose composition depends on the ratio of the concentration of the two metals of the catalyst producing the HMW and LMW components. The bimetallic catalyst produces a broad/bimodal MWD resin whose HMW and LMW components depend on the relative productivity of each of the transition metal sites of the catalyst. Water and/or carbon dioxide are cofed to the polymerization reactor at levels necessary to modify the weight fractions of the HMW and LMW components, thus achieving a target molecular weight distribution, MWD. The invention allows the resin MWD to be adjusted in the reactor. The weight fraction of the high molecular weight component decreases with the addition of the water and or the carbon dioxide and the FI of the overall product increases with a decrease in the HMW component weight fraction in the product.Type: GrantFiled: September 22, 1994Date of Patent: June 11, 1996Assignee: Mobil Oil CorporationInventors: Robert I. Mink, Thomas E. Nowlin, Pradeep P. Shirodkar, Sandra D. Schregenberger, Grace O. Tsien
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Patent number: 5508313Abstract: The invention provides inherently tacky, polymeric, organic, solvent-insoluble, solvent dispersible, elastomeric, pressure sensitive adhesive microspheres having pendant hydrophilic polymeric or oligomeric moieties having a degree of polymerization greater than or equal to 2. The microspheres which are sterically stabilized can offer enhanced stability against coagulation caused by alkali, alkali salts, polyelectrolytes and repeated freeze/thaw cycles. The present invention also provides pressure-sensitive adhesives comprising these microspheres including aerosol spray PSAs, coated sheet materials prepared therefrom, and method of making the microspheres.Type: GrantFiled: November 2, 1994Date of Patent: April 16, 1996Assignee: Minnesota Mining and Manufacturing CompanyInventors: Joaquin Delgado, Richard J. Goetz, Spencer F. Silver
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Patent number: 5326819Abstract: A method for the production of water absorbent polymer beads which retain a bead like shape after the absorption of water, wherein the absorbent beads are used in the manufacturing of concrete/mortar.Type: GrantFiled: October 9, 1991Date of Patent: July 5, 1994Assignee: Oosaka Yuuki Kagaku Kogyo Kabushiki KaishaInventors: Taiji Kanbayashi, Chuzo Kato
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Patent number: 5310810Abstract: An improved process for the preparation of segmented copolymers of polyolefins and poly(methacrylates) is disclosed.Type: GrantFiled: March 16, 1993Date of Patent: May 10, 1994Assignee: Rohm and Haas CompanyInventors: John Natoli, Min-Yin Chang
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Patent number: 5290867Abstract: A process for producing an emulsion graft copolymer, which comprises grafting a vinyl aromatic monomer and a comonomer onto a rubber latex in the presence of an iron (II) redox system as polymerization catalyst and coagulating the graft copolymer latex with an alkaline earth metal compound, characterized in that the pH of the coagulated slurry is adjusted to a value ranging from 8 to 12a) by addition of an alkali metal hydroxide to the obtained slurry after coagulation,b) by addition of an alkali metal hydroxide to the graft copolymer latex before coagulation, orc) by coagulating the graft copolymer latex with an alkaline earth metal hydroxide,with the proviso that the solidified product of the slurry obtained according to a), b) or c) is not washed with acidified water in a subsequent processing step.Graft copolymers are used e.g. for reinforcement of natural rubber, modification of rubber-based adhesives, in fibres, or in films.Type: GrantFiled: October 26, 1992Date of Patent: March 1, 1994Assignee: Ciba-Geigy CorporationInventors: Bernard Gilg, Kurt Stinsky
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Patent number: 5278246Abstract: A modified block copolymer composition comprising a thermoplastic polymer and a modified block copolymer consisting essentially of a base block copolymer of a monovinyl substituted aromatic hydrocarbon polymer block and an olefin compound polymer block having an ethylenic unsaturation degree not exceeding 20%, the base block copolymer having a molecular unit containing a carboxylic acid group and/or a group derived therefrom grafted thereto. The modified block copolymer composition of the present invention is a resinous composition excellent in impact resistance, adhesion, paint adhesion, weatherability, resistance to thermal deterioration, transparency and gloss or a rubbery or leather-like composition excellent in heat resistance, adrasion resistance, compression set resistance, adhesion, transparency, oil resistance, weatherability and resistance to heat aging.Type: GrantFiled: February 20, 1992Date of Patent: January 11, 1994Assignee: Asahi Kasei Kogyo Kabushiki KaishaInventors: Toshinori Shiraki, Fusakazu Hayano, Hideo Morita
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Patent number: 5274028Abstract: In an improved method for producing a surface graft of a hydrophilic polymer upon a preformed solid or semi-solid polymer substrate having hydroperoxide groups along its surface, n-vinyl pyrrolidone is utilized as the surface-grafting monomer, the substrate is selected to be insoluble in n-vinyl pyrrolidone, and the polymerization is carried out in aqueous alkaline conditions utilizing a combination of metal salts to provide a variable valence metal ion in a reduced state capable of oxidizing to suppress homopolymerization of the monomer in the solution.When the substrate is at least partially soluble in the n-vinyl pyrrolidone, an ethylenically unsaturated monomer having a higher reactivity with the substrate than n-vinyl pyrrolidone is added to the alkaline polymerization solution as a "seeding" monomer. Addition of the "seeding" monomer results in a surface-grafted copolymer effectively externalized from the substrate.Type: GrantFiled: December 6, 1990Date of Patent: December 28, 1993Assignee: Baxter International Inc.Inventors: William J. Bertrand, Stephen L. Coulter, Cary Reich, Paul DeAntonio
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Patent number: 5247024Abstract: An improved process for the preparation of segmented copolymers of polyolefins and poly(methacrylates) is disclosed.Type: GrantFiled: June 15, 1992Date of Patent: September 21, 1993Assignee: Rohm and Haas CompanyInventors: John Natoli, Min-Yin Chang
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Patent number: 5212270Abstract: This invention relates to a composition prepared by reacting, in the presence of a redox initiator and a mineral acid,(a) at least one hydroxyl-containing imide, amide or mixtures thereof of a hydrocarbyl substituted carboxylic acid or anhydride having a hydrocarbyl group containing from about 8 to about 150 carbon atoms and a hydroxy amine; with(b) at least one sulfo compound represented by the following formula: ##STR1## wherein each R.sub.1 is independently hydrogen or a hydrocarbyl group; a is zero or one;Q is a hydrocarbylene group or --C(X)N(R.sub.2)Q'--;R.sub.2 is hydrogen or a hydrocarbyl group;X is sulfur or oxygen;Q' is a hydrocarbylene group; andZ is --S(O)OH, or --S(O).sub.2 OH or an ester, a metal salt or an ammonium salt of the sulfo compound.The invention also relates to polymer fabrics treated with the compositions of the present invention. The treated polymer fabrics have improved wicking/wetting characteristics.Type: GrantFiled: September 17, 1991Date of Patent: May 18, 1993Assignee: The Lubrizol CorporationInventor: Kasturi Lal
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Patent number: 5128416Abstract: A process for preparing modified diene polymer rubbers having an increased impact resilience, a reduced hardness at low temperatures and an improved processability, and useful as rubber materials for automobile tires and other industries which comprises producing a conjugated diene polymer having alkali metal end or ends, and reacting the alkali metal-containing polymer with (a) a silicon or tin compound of the formula: R.sub.a MX.sub.b wherein R is an alkyl group, an alkenyl group, a cycloalkenyl group or an aromatic hydrocarbon group, M is silicon atom or tin atom, X is a halogen atom, a is 0, 1 or 2 and b is 2, 3 or 4, and (b) at least one member selected from the group consisting of a nitro compound; a phosphoryl chloride compound of the formula (1): ##STR1## wherein R.sup.1, R.sup.2, R.sup.3 and R.sup.4 are an alkyl group; an aminosilane compound of the formula (2): ##STR2## wherein R.sup.5, R.sup.6 and R.sup.7 are an alkyl group or an alkoxyl group, R.sup.8 and R.sup.Type: GrantFiled: September 5, 1990Date of Patent: July 7, 1992Assignee: Sumitomo Chemical Company, LimitedInventors: Akio Imai, Tomoaki Seki, Keisaku Yamamoto
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Patent number: 5075401Abstract: A graft copolymer is made by grafting, by a free radical reaction mechanism in aqueous solution, water soluble ethylenically unsaturated monomeric material on to a water soluble substrate having hydroxyl groups, and the free radicals are formed on the substrate using an oxidizing metal capable of being reduced by the substrate to a lower valency state (for instance cerium) and persulphate or other peroxy compound capable of oxidizing the metal back to a higher valency state. The process is preferably conducted as a reverse phase polymerization process and the invention includes also a novel reverse phase emulsion comprising a dispersion of reverse phase polymer particles of a graft copolymer of carboxymethyl cellulose, dextran or starch with acrylamide and acrylic acid and/or AMPS.Type: GrantFiled: August 25, 1989Date of Patent: December 24, 1991Assignee: Allied Colloids Ltd.Inventor: Lian-Sheng Zhang
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Patent number: 4981904Abstract: Stable spray-coatable, water base composition having about 2 percent solids, that dries into glittering film having plurality of reflective surfaces resistant to flaking, comprising: a blend of a surfactant free first solution comprising, butyl methacrylate, butyl acrylate, 2-ethylhexyl acrylate, glacial methacrylic acid and styrene; a blend of a self-crosslinking second solution comprising, 2-ethylhexyl acrylate, butyl methacrylate, glacial methacrylic acid, styrene and at least one cross-linking polymer; a thickener gel; transparent polyethylene terephthalate chips on which a color imparting or reflective material has been vacuum deposited and cured fast by an epoxy resin and ammonia.Type: GrantFiled: June 9, 1989Date of Patent: January 1, 1991Inventor: Larry C. Fischer
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Patent number: 4910258Abstract: The disclosure relates to a graft polymerization method to form a fluorine-containing graft copolymer which is useful as a soft and flexible fluororesin intermediate between fluororubbers and crystalline fluororesins. The graft copolymer is formed by polymerizing a fluorine-containing crystalline polymer, e.g. copolymer of CTFE and ethylene, in water in the presence of a reducing agent and a fluorine-containing elastomeric copolymer which comprises peroxy groups and is dispersed in the water to become the "trunk" of the graft copolymer. For example, the elastomeric copolymer is of vinylidene fluoride, CTFE and t-butyl peroxyallylcarbonate. An example of the reducing agent is sodium bisulfite, and optionally and additionally a source of a reducing metal ion such as ferric chloride may be used. This graft polymerization reaction can be carried out at a relatively low temperature, viz. at 20.degree.-50.degree. C.Type: GrantFiled: August 3, 1988Date of Patent: March 20, 1990Assignee: Central Glass Company, LimitedInventors: Shuichi Inoue, Satoru Hayase
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Patent number: 4839324Abstract: Composition for polymerization of ethylenically unsaturated monomer with initiator of perester salt of maleic acid and bisulfite activator in water-in-oil emulsion form.Type: GrantFiled: August 26, 1988Date of Patent: June 13, 1989Assignee: E. I. Du Pont de Nemours and CompanyInventor: Donald E. Swarts
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Patent number: 4831093Abstract: Polymerization of methyl methacrylate with initiator of perester salt of maleic acid is faster and better by providing bisulfite activator in water-in-oil emulsion form.Type: GrantFiled: August 26, 1988Date of Patent: May 16, 1989Assignee: E. I. Du Pont de Nemours and CompanyInventor: Donald E. Swarts
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Patent number: 4822858Abstract: During the reaction of grafting of styrene and acrylonitrile to polybutadiene, the conversion of the graft monomers is increased from the values of 92.div.94% usually obtained, to values very close to 98%, by carrying out a redox-type reaction additional to that provided by the process, in the presence of an additional aliquot of acrylonitrile and of catalytic system.Type: GrantFiled: May 22, 1986Date of Patent: April 18, 1989Assignee: Enichem Tecnoresine S.p.AInventors: Bruno Pivotto, Gualtiero Ferri, Franco Campana
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Patent number: 4728694Abstract: A process for grafting acrylamide onto the surface of low density polyethylene (LDPE). The LDPE is first oxidized by a chromic acid solution and then reduced with diborane to produce a hydroxyl-rich surface. Acrylamide is then grafted onto the surface of the LDPE by free-radical initiation, resulting in a hydrophilic polyacrylamide layer covalently bonded to the LDPE. The process has no effect on the bulk properties of the LDPE.Type: GrantFiled: May 8, 1987Date of Patent: March 1, 1988Assignee: University of FloridaInventors: Christopher D. Batich, Ali Yahiaoui
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Patent number: 4703090Abstract: Graft copolymers are prepared by means of a two-step polymerization process, in emulsion: in the first step, a vinylaromatic monomer and an acryl or metacryl monomer are grafted on a monomodal polybutadiene latex constituted of particles of diameter comprised within the range of from 800 to 2500 .ANG.. The polymerization/grafting reaction is continued up to a 70-90% conversion, at which time a further portion of monomodal polybutadiene is added, together with further amounts of said monomers, always in emulsion.Type: GrantFiled: December 9, 1985Date of Patent: October 27, 1987Assignee: Enichem Polimeri S.p.A.Inventors: Andrea Ferraresi, Pierluigi Griselli