Core-shell Patents (Class 525/902)
  • Patent number: 9000098
    Abstract: Polymer spheres are fabricated. Dispersing polymerization and a two-stage swelling procedure are processed. The polymer spheres fabricated have uniform granular sizes and are highly cross-linking. Thus, the polymer spheres are heat-resistant and solvent-resistant.
    Type: Grant
    Filed: May 14, 2012
    Date of Patent: April 7, 2015
    Assignee: Chung-Shan Institute of Science and Technology, Armaments, Bureau, Ministry of National Defense
    Inventors: Ming-Hsiung Wei, Yu-Wei Hou, Hui Chen, Chun-Lan Tseng
  • Patent number: 8951643
    Abstract: The present invention relates to an optical film and method of manufacturing the same. The optical film of the present invention includes an acrylic resin and a core-shell type graft copolymer wherein the core includes a conjugate diene rubber, and the shell includes an acrylic monomer, an aromatic vinyl monomer, and a maleimide monomer.
    Type: Grant
    Filed: October 1, 2009
    Date of Patent: February 10, 2015
    Assignee: LG Chem, Ltd.
    Inventors: Byoung-Il Kang, Chang-Hun Han, Jung-A Yoo, Song-Taek Oh
  • Patent number: 8916650
    Abstract: The present invention relates to an inner-plasticized vinyl chloride-based copolymer resin not requiring plasticizers and a preparation method thereof. Specifically, the vinyl chloride-based copolymer resin is prepared by a suspension polymerization method of initiating the polymerization of vinyl chloride monomer, feeding a certain amount of butyl acrylate continuously or discontinuously thereinto and carrying out the additional polymerization at the temperature higher than the polymerization initiation temperature so as to prepare a core-shell type vinyl chloride-based random copolymer resin. The vinyl chloride-based copolymer resin of core-shell structure prepared by the present invention includes vinyl chloride-butyl acrylate copolymer, and it can provide a vinyl chloride-butyl acrylate copolymer product which can be processed without plasticizers positively necessary to produce a soft product.
    Type: Grant
    Filed: July 16, 2013
    Date of Patent: December 23, 2014
    Assignee: Hanwha Chemical Corporation
    Inventors: Ji-Woo Kim, Jee-Hyong Lee, Jung-Ho Kong, Yong-Kook Jung, Sang-Hyun Cho
  • Patent number: 8907010
    Abstract: A non aqueous dispersion is disclosed containing: a shell polymer; a core polymer, and a continuous phase solvent, wherein said shell polymer is soluble and said core polymer is insoluble in the continuous solvent. Also disclosed is a method for improving the setting properties of a sheet fed offset ink by adding to the ink the above non aqueous dispersion.
    Type: Grant
    Filed: June 11, 2009
    Date of Patent: December 9, 2014
    Assignee: Sun Chemical Corporation
    Inventors: Ramasamy Krishnan, Mark Schneider, Jerome Bollard
  • Patent number: 8895666
    Abstract: A method for producing a (meth)acrylic polymer particle comprises polymerizing a monomer (X) having a (meth)acryloyl group to produce a polymer particle, and polymerizing a monomer mixture (Y) in the presence of the polymer particle, in which the monomer (X) is 90 to 99.9% by mass and the monomer mixture (Y) is 0.01 to 10% by mass in terms of the ratio among monomer raw materials to be supplied for polymerization; and the monomer mixture (Y) comprises 1 to 80% by mol of a monomer (a) having a basic nitrogen atom or having a blocked isocyanate as a functional group, 5 to 80% by mol of a (meth)acrylate monomer (b) of at least one alcohol selected from the group consisting of an aliphatic alcohol having 2 or more carbon atoms, an aromatic alcohol, and a cyclic alkyl alcohol, and 0 to 94% by mol of a monomer (c) other than the monomer (a) and the monomer (b).
    Type: Grant
    Filed: February 23, 2007
    Date of Patent: November 25, 2014
    Assignee: Mitsubishi Rayon Co., Ltd.
    Inventors: Satoshi Mae, Hiroyasu Irie, Toshihiro Kasai
  • Patent number: 8846819
    Abstract: A method is provided for synthesizing a core-shell nanoparticle that includes the following steps: providing a polymeric seed (in a solvent) that includes a mono-vinyl monomer cross-linked with a cross-linking agent to form the core of the nanoparticle, the core has an average diameter of from about nanometers to about 10,000 nanometers, and the core has polymer chains with living ends; adding a stabilizer to stabilize the seed and prevent the seed from precipitating out of solution; and grafting a shell species onto the living ends of the core to form the shell of the nanoparticle. A core-first synthesized nanoparticle, along with a rubber composition and tire product are also provided.
    Type: Grant
    Filed: December 29, 2009
    Date of Patent: September 30, 2014
    Assignee: Bridgestone Corporation
    Inventors: Yaohong Chen, Mindaugas Rackaitis, Xiaorong Wang, Hideki Kitano
  • Patent number: 8841385
    Abstract: The present invention provides a method of preparing a polymer particle. More precisely, the invention provides a polymer particle having optimum impact strength and improved elastic recovery rate by forming the brush having softness on the surface of the monodisperse polymer particle by the anion dispersion polymerization using a conjugated diene monomer.
    Type: Grant
    Filed: March 8, 2013
    Date of Patent: September 23, 2014
    Assignee: LG Chem, Ltd.
    Inventors: Bo-ryeong Han, Moon-seok Chun, Do-yeon Park, Su-kyung Kim, Chong-min Koo, Bum-jae Lee, Choel-han Gang
  • Patent number: 8829081
    Abstract: A method of preparing core-shell submicron spheres is disclosed. The method comprises steps hereafter. An emulsion containing a core monomer is heated to a temperature of 10° C. below its boiling point to the boiling point. A core forming step is performed by adding an initiator solution to the heated emulsion to form cores by polymerizing the core monomer. When the conversion of the above polymerization is 10% to 95%, a shell forming step is performed by adding a shell monomer into the emulsion, at a temperature of 50° C. below the emulsion's boiling point to the boiling point thereof, to form shells, respectively surrounding the cores, by polymerizing the shell monomer.
    Type: Grant
    Filed: March 22, 2012
    Date of Patent: September 9, 2014
    Assignee: National Central University
    Inventors: Hui Chen, Ming-Yu Lo, Yu-Cheng Kuo
  • Patent number: 8816008
    Abstract: The invention relates to an impact modified thermoplastic resin comprising a polymeric impact modifier with a core-shell structure comprising 2-octylacrylate.
    Type: Grant
    Filed: September 20, 2011
    Date of Patent: August 26, 2014
    Assignee: Arkema France
    Inventors: Rosangela Pirri, Stephane Girois, Pascale Dargelos, Magali Bergeret-Richaud
  • Patent number: 8779051
    Abstract: The instant invention provides a thermoplastic composition, method of producing the same, and articles made therefrom. The thermoplastic composition according to present invention comprises the melt blending product of: (a) from 10 to 75 percent by weight of a continuous phase, based on the total weight of the thermoplastic composition, wherein said continuous phase comprises one or more thermoplastic polymers; and (b) from 25 to 90 percent by weight of a dispersed phase comprising one or more core/shell polymer particles, based on the total weight of the thermoplastic composition, wherein said one or more core/shell polymer particles comprise a crosslinked elastomer core and a thermoplastic shell and wherein said core/shell polymer has an average particle size diameter in the range of from 70 to 10,000 nm.
    Type: Grant
    Filed: July 6, 2011
    Date of Patent: July 15, 2014
    Assignees: Dow Global Technologies LLC, Rohm and Haas Company
    Inventors: Srdjan Kisin, Eric G. Lundquist, Timothy E. Clayfield, Yannick Saint-Gerard, Veera Nelliappan
  • Patent number: 8758655
    Abstract: The present invention provides an optical film and a retardation film that each include an acryl resin, and 20 to 65 parts by weight of a graft copolymer including a conjugated diene rubber based on 100 parts by weight of the acryl resin, and an electronic device including the same.
    Type: Grant
    Filed: September 17, 2008
    Date of Patent: June 24, 2014
    Assignee: LG Chem, Ltd.
    Inventors: Byoung-Il Kang, Chan-Hong Lee, Chang-Hun Han
  • Patent number: 8741985
    Abstract: A resin composition for sealers as well as a resin composition for sealers and a paint composition for sealers that contains the resin composition for sealers are useful for sealers to be used with such inorganic building materials as ceramic-based building materials. The resin emulsion for sealers is a resin emulsion which contains emulsion particles having an inner layer and an outer layer. The inner layer is formed with a polymer which is formulated by means of emulsion polymerization of a monomer component containing styrene and a monomer other than the styrene, and the outer layer is formed with a polymer which is formulated by means of emulsion polymerization of a monomer component containing a carboxyl-group-containing monomer and a monomer other than the carboxyl-group-containing monomer.
    Type: Grant
    Filed: November 25, 2009
    Date of Patent: June 3, 2014
    Assignee: Nippon Shokubai Co., Ltd.
    Inventors: Kanji Nakao, Keiichi Nakamoto
  • Patent number: 8697775
    Abstract: Provided is a polymer nanoparticle comprising a core and a vulcanizable shell, wherein the core has a glass transition temperature (Tg) of at least about 150° C. Also provided is a method of preparing polymer nanoparticles with a core and a vulcanizable shell, comprising (a) in a liquid hydrocarbon medium, polymerizing conjugated diene monomers to produce a poly(conjugated diene) block and (b) copolymerizing the poly(conjugated diene) block with a mixture of mono-vinyl aromatic monomers and multiple-vinyl aromatic monomers to produce an aromatic block, wherein the core has a Tg of at least about 150° C. Also provided is a composition comprising (a) a rubber matrix; and (b) a polymer nanoparticle including a core and a vulcanizable shell; wherein the Tg of the core is at least about 150° C.
    Type: Grant
    Filed: December 20, 2006
    Date of Patent: April 15, 2014
    Assignee: Bridgestone Corporation
    Inventors: James E. Hall, Sandra Warren, Alberto Scurati, Xiaorong Wang
  • Patent number: 8680180
    Abstract: An epoxy resin composition comprises an epoxy resin (A) and rubber-like polymer particles (B). The rubber-like polymer particles (B) maintain a finely dispersed state of primary particles. The content of the rubber-like polymer particles (B) is 0.5 to 80% by weight when the total amount of the epoxy resin (A) and rubber-like polymer particles (B) is 100% by weight. Rubber-like polymer particles (B) are obtainable by graft-polymerizing 5 to 50% by weight of a shell layer (B-2) with 50 to 95% by weight of a rubber particle core (B-1), and average particle diameter of the rubber-like polymer particles (B) is 0.03 to 2 ?m. Rubber particle core (B-1) comprises elastic material of not less than 50% by weight of at least one monomer selected from diene monomers and (meth)acrylate monomers and less than 50% by weight of another coploymerizable vinyl monomer, or polysiloxane rubber elastic materials, or a mixture thereof.
    Type: Grant
    Filed: February 13, 2012
    Date of Patent: March 25, 2014
    Assignee: Kaneka Corporation
    Inventors: Katsumi Yamaguchi, Masakuni Ueno, Masahiro Miyamoto
  • Patent number: 8680201
    Abstract: The present invention relates to a compounding method for producing impact-modified thermoplastic compositions with a low content of volatile organic compounds (hereinafter VOCs), wherein relatively inexpensive polymer raw materials with a comparatively elevated initial VOC content may be used, resulting in lowered production costs for producing such VOC-reduced polymer compositions.
    Type: Grant
    Filed: February 18, 2010
    Date of Patent: March 25, 2014
    Assignee: Bayer Materialscience AG
    Inventors: Andreas Seidel, Hans-Jürgen Thiem
  • Patent number: 8653192
    Abstract: A method for manufacturing a thermoplastic composition including: a polyester resin (c); a mixture including a copolymer (a) of an ?-olefin and of a monomer having an ethylenic unsaturation and an epoxy function, as well as a core-shell compound (b); characterized in that said method includes a first step of manufacture the mixture of (a) and (b) by extrusion at a temperature at which the copolymer (a) is in the molten state and at a maximum temperature of 60 to 180° C.; a second step of manufacturing the thermoplastic composition by extrusion or by mixing the polyester resin (c) with the mixture of (a) and (b) produced in the first step.
    Type: Grant
    Filed: July 13, 2010
    Date of Patent: February 18, 2014
    Assignee: Arkema France
    Inventors: Sebastien Quinebeche, Alexander Korzhenko, Alain Bouilloux, Stephane Girois
  • Patent number: 8648148
    Abstract: Disclosed is a mass polymerized rubber-modified monovinylidene aromatic copolymer composition with an excellent balance of aesthetic, physical and mechanical properties, in particular good impact with low consistent gloss across an injection molded textured part, and a method for preparing such a composition.
    Type: Grant
    Filed: October 5, 2006
    Date of Patent: February 11, 2014
    Assignee: Styron Europe GmbH
    Inventors: Nigel A. Shields, Dominique Maes, Mary Ann Jones, Thomas D. Traugott
  • Patent number: 8642700
    Abstract: A thermoplastic composition suitable for making articles having low gloss and good impact resistance at low temperatures is disclosed. The composition contains (A) 10 to 90 percent relative to the weight of the composition (pbw) of an aromatic (co)poly(ester)carbonate, (B) 10 to 90 pbw of first graft (co)polymer containing a graft base selected from the group consisting of polyurethane, ethylene vinyl acetate, silicone, ethylene-propylene diene rubbers, ethylene propylene rubbers, acrylate rubbers, diene rubbers, and polychloroprene, and a grafted phase, (C) 1 to 20 pbw of a linear glycidyl ester functional polymer comprising repeating units derived from one or more glycidyl ester monomers and (D) 1 to 20 pbw of a second graft (co)polymer containing a core and shell wherein the core contains an interpenetrated network of poly(meth)alkyl acrylate and polyorganosiloxane, and wherein the shell contains poly(meth)acrylate.
    Type: Grant
    Filed: November 3, 2006
    Date of Patent: February 4, 2014
    Assignee: Bayer MaterialScience LLC
    Inventors: Marina Rogunova, James P. Mason, Xiangyang Li
  • Patent number: 8637144
    Abstract: A process for the polymerization of a true tetrafluoroethylene (TFE) copolymer of the fine powder type is provided, wherein the copolymer contains polymerized comonomer units of at least one comonomer other than TFE in concentrations of at least or exceeding 1.0 weight percent, and which can exceed 5.0 weight percent, wherein the copolymer is expandable, that is, the copolymer may be expanded to produce strong, useful, expanded TFE copolymeric articles having a microstructure of nodes interconnected by fibrils.
    Type: Grant
    Filed: October 4, 2007
    Date of Patent: January 28, 2014
    Assignee: W. L. Gore & Associates, Inc.
    Inventor: Lawrence A. Ford
  • Patent number: 8628852
    Abstract: Disclosed are core-shell resin particles (C2) each comprising one or more film-like shell layers (P) comprising a resin (a) which is a polyurethane resin and a core layer (Q) comprising a resin (b). A core-shell resin particle (C2) is characterized in that the weight ratio between (P) and (Q) is from 0.1:99.9 to 70:30, the volatile content in the resin particle (C2) is not more than 2 weight %, and the content of vinyl resins in the resin (b) is not more than 30 weight %. Such resin particles have a uniform particle diameter and are excellent in electrostatic properties, thermal and storage stability and thermal characteristics.
    Type: Grant
    Filed: July 27, 2006
    Date of Patent: January 14, 2014
    Assignee: Sanyo Chemical Industries Ltd.
    Inventors: Takashi Akutagawa, Tsuyoshi Izumi
  • Patent number: 8580896
    Abstract: A process for preparing a fluorine-containing polymer which includes a first step for preparing a dispersion of fluorine-containing emulsified particles (A) having ionic functional groups where a fluorine-containing monomer mixture (i) is polymerized by using a water soluble radical polymerization initiator (a) without addition of an emulsifying agent, and a second step for preparing a fluorine-containing polymer (b) having a small amount of ionic functional groups where fluorine-containing monomers (ii) are emulsion-polymerized by using a radical polymerization initiator (b) in the presence of the fluorine-containing emulsified particles (A) having ionic functional groups without addition of an emulsifying agent.
    Type: Grant
    Filed: May 9, 2007
    Date of Patent: November 12, 2013
    Assignee: Daikin Industries, Ltd.
    Inventors: Mitsuru Kishine, Masanori Kitaichi, Daisuke Ota, Masahiko Oka
  • Patent number: 8575274
    Abstract: The present invention relates to bone cements and, more particularly, to multi-solution bone cements and methods for making the same. An embodiment of the present invention provides multi-solution bone cements which include cross-linked PMMA beads, thereby providing for a significant increase in the polymer-to-monomer (P:M) ratio. Another embodiment of the present invention provides cross-linked PMMA beads which are surface modified with unsaturated carbon double bonds. A further embodiment of the present invention provides multi-solution bone cements made with PMMA-PMMA spherical brush polymers.
    Type: Grant
    Filed: July 17, 2007
    Date of Patent: November 5, 2013
    Assignee: Syracuse University
    Inventors: Julie M. Hasenwinkel, Imad K. Merkhan, Jeremy L. Gilbert
  • Patent number: 8513355
    Abstract: Disclosed is a graft copolymer highly improving the adhesion resistance and impact strength, a method of preparing the same, and PVC composition containing the same, wherein the graft copolymer comprises i) 55 to 85 wt % of a conjugated diene-based rubber core; and ii) 15 to 45 wt % of a graft shell surrounding the rubber core, and formed by comprising a (meth)acrylate-based monomer, and at least one selected from the group consisting of a vinyl-based monomer having a polyalkylene oxide group represented by the following Formula 1; in which the graft copolymer includes 0.1 to 5 wt % of the vinyl-based monomer having the polyalkylene oxide group represented by the following Formula 1: wherein R is independently hydrogen, or C1 to C4 alkyl group, and n is independently 3 to 14.
    Type: Grant
    Filed: August 27, 2010
    Date of Patent: August 20, 2013
    Assignee: LG Chem, Ltd.
    Inventors: Yoon Ho Kim, Geon Soo Kim, Yeon Hwa Wi, Ki Hyun Yoo, Chan Hong Lee
  • Patent number: 8501855
    Abstract: A multi-stage aqueous emulsion polymer, an aqueous coating composition including the emulsion polymer, and a method for providing a coating including the emulsion polymer are provided. The multistage emulsion polymer includes from 10% to 30% by wt., based on the wt. of the multistage emulsion polymer, of a first polymer shell having an acid number of from 5 to 100, the first polymer having a calculated Mn of from 1000 to 4500 and a calculated Tg of lower then 100° C.; and from 70% to 90% by wt., based on the wt. of the multistage emulsion polymer, of a second polymer core having an acid number of from 0 to one-half the acid number of the first polymer, the second polymer having a calculated Mn of greater than 20,000.
    Type: Grant
    Filed: April 1, 2011
    Date of Patent: August 6, 2013
    Assignee: Rohm and Haas Company
    Inventors: Gary W. Dombrowski, William J. Rosano
  • Patent number: 8450395
    Abstract: Disclosed is a resin having excellent impact resistance and color, and a method of preparing the same, and more specifically, a resin having the excellent impact resistance and color, and a method of preparing the same, in which the resin includes (a) an occlusion seed consisting of i) a base seed including 99.95 to 99 wt % of alkyl methacrylate and 0.05 to 1 wt % of crosslinker, and ii) a copolymer of aromatic vinyl compound and alkyl acrylate occluding the base seed; (b) a polymer core surrounding the occlusion seed; and (c) a polymer shell surrounding the core, and according to the present invention, it is effective in providing a resin having superior impact strength, transparency, and color, in which the resin can be used as an excellent impact modifier when applying on a polymethylmethacrylate resin, and a method of preparing the same.
    Type: Grant
    Filed: November 10, 2010
    Date of Patent: May 28, 2013
    Assignee: LG Chem, Ltd.
    Inventors: Se Eun Lee, Dong Jo Ryu, Seon Hee Han, Jeong Heon Ahn
  • Patent number: 8445559
    Abstract: A polymeric particle including a core, a first shell, and a second shell is provided: the core including, when dry, at least one void; the first shell polymer having a calculated glass transition temperature (“Tg”) greater than 50° C. and including, as polymerized units, from 15% to 60%, by weight based on the weight of the first shell, monomer selected from the group consisting of acrylonitrile, methacrylonitrile, acrylamide, methacrylamide, and mixtures thereof; and from 0.3% to 10%, by weight based on the weight of the first shell polymer, multiethylenically unsaturated monomer; and the second shell polymer having a Tg of from ?60° C. to 50° C.; wherein the weight ratio of the second shell polymer to the total of all other structures of the polymeric particle is from 0.5:1 to 3:1. The particle provides binding functionality and, when dry, opacity and energy savings. A method for providing a polymeric particle and a method for providing opacity to a dry coating are also provided.
    Type: Grant
    Filed: June 24, 2009
    Date of Patent: May 21, 2013
    Assignee: Rohm and Haas Company
    Inventor: James Keith Bardman
  • Patent number: 8415436
    Abstract: The present invention provides a polymer particle and a method of preparing the same. More precisely, the invention provides a polymer particle having optimum impact strength and improved elastic recovery rate by forming the brush having softness on the surface of the monodisperse polymer particle by the anion dispersion polymerization using a conjugated diene monomer.
    Type: Grant
    Filed: November 19, 2007
    Date of Patent: April 9, 2013
    Assignee: LG Chem, Ltd.
    Inventors: Bo-ryeong Han, Moon-seok Chun, Do-yeon Park, Su-kyung Kim, Chong-min Koo, Bum-jae Lee, Choel-han Gang
  • Patent number: 8404781
    Abstract: Butadiene is anionically polymerized (or block copolimerized with styrene) in a low-boiling non-polar solvent in presence of rganolithiura compounds. At the end of the polymerization, the non-polar solvent is switched with styrene and the new solution is stored in tanks in relation to the type of polybutadiene (or its block copolymer with styrene) obtained. The polybutadiene solution (and/or its block copolymer with styrene) with the desired set of properties is then fed to a production plant of high impact vinyl aromatic (co)polymers.
    Type: Grant
    Filed: November 28, 2008
    Date of Patent: March 26, 2013
    Assignee: Polimeri Europa S.p.A.
    Inventors: Riccardo Inglese, Leonardo Chiezzi, Fabio Montanari, Alessandro Casalini
  • Patent number: 8389633
    Abstract: Disclosed therein is method for preparing novel suspension polymer comprising tetrafluoroethylene polymer, and powders or granules produced by the method. The suspension polymer of the present invention can be obtained by suspension polymerization of a styrene-based monomer, an acrylic monomer or a mixed monomer thereof in the presence of PTFE, followed by filtering and drying, and can be used as flame retarding properties improver of engineering plastic and the like.
    Type: Grant
    Filed: January 20, 2006
    Date of Patent: March 5, 2013
    Inventor: Ji-Ho Park
  • Patent number: 8383726
    Abstract: Disclosed is a thermoplastic resin composition having excellent impact resistance at a low temperature, while maintaining high transparency; this thermoplastic resin composition is obtained by compounding an impact resistance improver into a thermoplastic resin, the impact resistance improver being composed of a graft copolymer which is obtained by polymerizing a vinyl monomer component in the presence of a polymer mixture containing a polymer having butadiene units as an essential component and a polymer having styrene units as an essential component, the polymer mixture containing 45 to 65% by mass of the butadiene units and 35 to 55% by mass of the styrene units.
    Type: Grant
    Filed: August 29, 2007
    Date of Patent: February 26, 2013
    Assignees: Mitsubishi Rayon Co., Ltd., Cheil Industries Inc.
    Inventors: Osamu Okunaka, Hiroyuki Nishii, Takashi Shouji, Keiji Nakamura, Tae Uk Kim, Byung Choon Lee
  • Patent number: 8383734
    Abstract: The present invention relates to bone cements and, more particularly, to acrylic-based orthopedic bone cements, their use in spinal applications, and methods for making the same. An embodiment of the present invention provides a method of grafting PMMA brushes on cross-linked PMMA nanospheres comprising at least one of the following steps: performing a hydrolysis reaction of surface methyl ester groups of said cross-linked PMMA nanospheres to form surface carboxylic acid groups of said cross-linked PMMA nanospheres; forming a 2-aminoethyl acrylate compound; coupling said surface carboxylic acid groups of said cross-linked PMMA nanospheres with said 2-aminoethyl acrylate compound to form a coupled compound with an initiating site; and grafting said PMMA brushes onto said initiating site.
    Type: Grant
    Filed: April 21, 2010
    Date of Patent: February 26, 2013
    Assignee: Syracuse University
    Inventors: Julie M. Hasenwinkel, Jeremy L. Gilbert, Danieli C. Rodrigues, Rebecca Bader
  • Patent number: 8349961
    Abstract: A process for the preparation of vinylaromatic (co)polymers grafted on an elastomer comprising a rigid matrix consisting of vinylaromatic polymers or copolymers and of an elastomeric phase dispersed in the matrix in form of particles with a strictly bimodal distribution which comprises the functionalization of a first elastomeric fraction by means of a catalytic system containing a stable free radical initiator and subsequently the polymerization of the thus obtained mixture also in presence of a second non functionalized elastomeric fraction.
    Type: Grant
    Filed: December 6, 2005
    Date of Patent: January 8, 2013
    Assignee: Polimeri Europa S.p.A.
    Inventors: Leonardo Chiezzi, Luca Monti, Aldo Longo
  • Patent number: 8252867
    Abstract: The present invention relates to an impact strength modifier for thermoplastic polyester resin and a thermoplastic polyester resin composition containing the same, more precisely an impact strength modifier for thermoplastic polyester resin prepared by graft-polymerization of a) 20-80 weight % of multilayered rubber latex in which the ratio of particle diameter (Pb/Pa) of an inner layer (Pa) to outer layer is 1.05-1.5, and glass transition temperature of the inner layer or the outer layer is up to ?30° C.; and b) 20-80 weight % of vinyl monomer. According to the present invention, a thermoplastic polyester resin composition having excellent transparency and improved impact strength can be provided by containing an impact strength modifier for thermoplastic polyester resin having multilayered structure in which content of rubber latex, glass transition temperature, particle diameter and refraction index are regulated.
    Type: Grant
    Filed: December 24, 2008
    Date of Patent: August 28, 2012
    Assignee: LG Chem, Ltd.
    Inventors: Yoon-Ho Kim, Geon-Soo Kim, Sang-Il Nam
  • Patent number: 8242205
    Abstract: A novel method of preparing an aqueous dispersion of non-uniform polyurethane particles which comprises (a) preparing at least two isocyanate-terminated polyurethane prepolymers having different hydrophilicities; (b) preparing a uniform mixture of said prepolymers, and (c) dispersing the mixed prepolymers in an aqueous medium. The resulting dispersion of the prepolymers may optionally be chain extended. This method enables the preparation of core-shell particles as well as particles of other morphologies, including “raspberry”, interpenetrating network, “salt-and-pepper”, “ice-cream cone” and particles of gradient composition. Similarly, an aqueous dispersion of two different polyurethane polymers may be obtained by first preparing at least two different isocyanate-terminated polyurethane prepolymers, preparing a uniform mixture of such prepolymers and thereafter dispersing the mixture in an aqueous medium.
    Type: Grant
    Filed: August 24, 2009
    Date of Patent: August 14, 2012
    Assignee: Lubrizol Advanced Materials, Inc.
    Inventors: Alexander V. Lubnin, Dennis Malaba, Vic Stanislawczyk, Gary D. Calhoun
  • Patent number: 8236898
    Abstract: A melt-mixed composition of non-melt flowable polytetrafluoroethylene (PTFE) and melt-fabricable perfluoropolymer is provided that exhibits thixotropy at increasing shear rate in the molten state and high elongation at break even at PTFE concentrations well above 4 wt %, based on the combined weight of the PTFE and the perfluoropolymer, e.g. at least 200% up to at least 30 wt % PTFE, the composition also exhibiting the structure of a dispersion of submicrometer-size particles of the PTFE in a continuous phase of the melt-fabricable perfluoropolymer.
    Type: Grant
    Filed: September 22, 2011
    Date of Patent: August 7, 2012
    Assignee: E I du Pont de Nemours and Company
    Inventors: Heidi Elizabeth Burch, Sundar Kilnagar Venkataraman, Ralph Munson Aten
  • Patent number: 8232347
    Abstract: A high-quality oxygen-absorbing resin composition which is obtained without suffering resin scorching. Also provided are pellets for the oxygen-absorbing resin composition which comprise a thermoplastic resin (A) and an oxidation catalyst. After the pellets are mixed with a trigger resin and a thermoplastic resin (C), the trigger resin functions as a trigger to cause the oxidation of the thermoplastic resins (A) and (C) to proceed. As a result, the resultant composition absorbs oxygen.
    Type: Grant
    Filed: February 5, 2010
    Date of Patent: July 31, 2012
    Assignee: Toyo Seikan Kaisha, Ltd.
    Inventors: Takayuki Ishihara, Hiroaki Goto, Yoshihiro Ohta, Yuji Yamaguchi, Go Saito
  • Patent number: 8133943
    Abstract: Disclosed is a polylactic acid/polycarbonate resin composition including (A) about 100 parts by weight of a mixed resin including: (a1)) about 10 to about 90 wt % of a polycarbonate resin and (a2) about 10 to about 90 wt % of a polylactic acid resin; (B) about 1 to about 50 parts by weight of a flame retardant based on about 100 parts by weight of the mixed resin; (C) about 1 to about 30 parts by weight of an acryl-based copolymer based on about 100 parts by weight of the mixed resin; and (D) about 1 to about 20 parts by weight of an impact-reinforcing agent based on about 100 parts by weight of the mixed resin.
    Type: Grant
    Filed: November 18, 2009
    Date of Patent: March 13, 2012
    Assignee: Cheil Industries Inc.
    Inventors: Jin-Kyung Cho, Hyung-Tak Lee, Doo-Han Ha, Chang-Do Jung
  • Patent number: 8067482
    Abstract: A process for the preparation of plastic molded articles which can be used in the dental field, the process including the steps of: mixing A) at least one polymerizable component and B) at least one initiator in desensitized form to form a paste having a consistency does not demix during injection; injecting the paste into a cuvette; and polymerizing the mixture by applying heat.
    Type: Grant
    Filed: March 2, 2007
    Date of Patent: November 29, 2011
    Assignee: Ivoclar Vivadent AG
    Inventors: Volker Rheinberger, Wolfgang Wachter, Gottfried Rohner
  • Patent number: 8039557
    Abstract: A process for the preparation of vinylaromatic (co)polymers grafted on an elastomer in a controlled way, comprising the dissolving of an elastomer, such as polibutadiene, in a mixture consisting of a monomer and of a solvent in the presence of a polymerization catalytic system, which comprises an initiator of free radicals and a stable initiator of free radicals. The mixture obtained in this way is heated to a temperature of about 100° C. to functionalize the rubber, then more monomer is added and the temperature is raised to start the polymerization reaction.
    Type: Grant
    Filed: March 7, 2005
    Date of Patent: October 18, 2011
    Assignee: Polimeri Europa S.p.A.
    Inventors: Aldo Longo, Leonardo Chiezzi
  • Patent number: 8017695
    Abstract: This invention relates to a method for producing functionalized cis-1,4-polydienes having a combination of a high cis-1,4-linkage content and a high functionality, the resulting polymers and the vulcanized products containing the polymers. The functionalized cis-1,4-polydienes of the present invention are produced by a method comprising the steps of: (1) preparing a reactive polymer by polymerizing conjugated diene monomer with a lanthanide-based catalyst in the presence of less than 20% by weight of organic solvent based on the total weight of monomer, organic solvent, and resulting polymer, where the lanthanide-based catalyst is the combination of or reaction product of (a) a lanthanide compound, (b) an aluminoxane, (c) an organoaluminum compound other than an aluminoxane, and (d) a halogen-containing compound; and (2) contacting the reactive polymer with a functionalizing agent.
    Type: Grant
    Filed: December 27, 2007
    Date of Patent: September 13, 2011
    Inventors: Steven Luo, Junko Kurazumi, Yoichi Ozawa, Timothy L. Tartamella, Mark Smale, Kevin McCauley
  • Patent number: 8013063
    Abstract: The present invention relates to acryl-silicone hybrid impact modifiers, the method of their manufacture, and vinyl chloride resin compositions containing the above. The acryl-silicone hybrid impact modifier of the present invention contains a seed obtained through emulsion copolymerization of vinyl monomers and hydrophilic monomers; an acryl-silicone hybrid rubber core covering the seed in which a polyorganosiloxane rubber phase is dispersed locally onto the inner part and surface of the acrylic rubber core containing alkyl acrylate polymers and a shell covering the above rubber core and containing alkyl methacrylate polymers. Thermoplastic resins containing the above, particularly by being added to vinyl chloride resins, they have effects of granting superior impact resistance, weatherability, and high gloss.
    Type: Grant
    Filed: May 13, 2004
    Date of Patent: September 6, 2011
    Assignee: LG Chem, Ltd.
    Inventors: Kwang-jin Lee, Jeong-heon Ahn, Hye-kyong Lee
  • Patent number: 8008397
    Abstract: Provided are a rubber latex having a multi-layer structure, wherein an inner-layer rubber latex has a refractive index greater than that of an outer-layer rubber latex, a graft copolymer prepared from the rubber latex, a polyvinyl chloride (PVC) resin blend containing the graft copolymer, and a method of preparing the rubber latex. The PVC resin blend containing the graft copolymer including the rubber latex according to the present invention has improved color property and low-temperature impact strength than conventional PVC resins.
    Type: Grant
    Filed: August 8, 2006
    Date of Patent: August 30, 2011
    Assignee: LG Chem, Ltd.
    Inventors: Yoon Ho Kim, Wonsuk Jang, Geon Soo Kim
  • Patent number: 7960479
    Abstract: A copolymer of formula 1 in which M1 is a unit obtainable from ring opening metathesis polymerization (ROMP); R is an alkyl, ether, ester or aryl unit; M2 and M3 are independently selected from units obtainable by reversible addition fragmentation chain transfer polymerization (RAFT); X is a terminal unit selected from the group consisting of dithioester, trithiocarbonate, xanthate; and m is an integer from 2 to 1 million, n is an integer from 2 to 500,000 and k is an integer from 2 to 500,000.
    Type: Grant
    Filed: November 2, 2007
    Date of Patent: June 14, 2011
    Assignee: Conopco, Inc.
    Inventors: Chong Cheng, Ezat Khoshdel, Karen Lynn Wooley
  • Patent number: 7956105
    Abstract: Disclosed is a silicone impact modifier with a high refractive index. The silicone impact modifier can include (A) a rubber core including (a1) an organosiloxane cross-linked (co)polymer with a particle size of about 50 to about 400 nm and (a2) an alkylacrylate-styrenic aromatic compound cross-linked copolymer; and (B) a plastic shell including a vinyl (co)polymer. The refractive index of the silicone impact modifier of the present invention can be about 1.49 to about 1.59.
    Type: Grant
    Filed: June 27, 2007
    Date of Patent: June 7, 2011
    Assignee: Cheil Industries Inc.
    Inventors: Han Su Lee, Sung Sig Min, Byung Choon Lee, Byeong Do Lee
  • Patent number: 7956127
    Abstract: Disclosed herein are a polycarbonate resin composition and a plastic article produced from the resin composition. The polycarbonate resin composition includes about 85 to about 99 parts by weight of a polycarbonate resin and about 1 to about 15 parts by weight of a core-shell graft copolymer, wherein the core-shell graft copolymer has a core-shell structure in which a vinyl monomer including methyl methacrylate and phenyl methacrylate is grafted onto a rubber.
    Type: Grant
    Filed: December 18, 2007
    Date of Patent: June 7, 2011
    Assignee: Cheil Industries Inc.
    Inventors: Byung Choon Lee, Tae Uk Kim
  • Patent number: 7943704
    Abstract: 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: Grant
    Filed: July 10, 2006
    Date of Patent: May 17, 2011
    Assignee: BASF Aktiengesellschaft
    Inventors: Konrad Roschmann, Arno Tuchbreiter, Ekkehard Jahns, Joerg Leuninger, Bernhard Schuler, Oliver Wagner, Michaela Reinsch, Robert Wrazidlo
  • Patent number: 7875684
    Abstract: The invention discloses thermosetting water-based paint comprising water-dispersible acrylic polymer particles which are obtained through multi-stage emulsion polymerization of radical polymerizable unsaturated monomers using a specific reactive emulsifying agent, said monomers comprising amido-containing radical polymerizable unsaturated monomer having at least 2 radical polymerizable unsaturated groups per molecule, methacrylic acid and hydroxyl-containing radical polymerizable unsaturated monomer; and coating film-forming methods which use the thermosetting water-based paint.
    Type: Grant
    Filed: December 20, 2005
    Date of Patent: January 25, 2011
    Assignee: Kansai Paint Co., Ltd.
    Inventors: Noritoshi Nakane, Yoshiyuki Yukawa
  • Patent number: 7868098
    Abstract: The invention relates to a process for preparing (meth)acrylate-based ABA triblock copolymers with an olefinic functionalization of the A blocks.
    Type: Grant
    Filed: August 30, 2006
    Date of Patent: January 11, 2011
    Assignee: Evonik Roehm GmbH
    Inventors: Gerd Loehden, Sven Balk, Monika Maerz, Christine Troemer
  • Patent number: 7868063
    Abstract: Disclosed is a powdered polymeric lubricant having a multi-layer structure as a processing aid capable of being used to improve processability of a vinyl chloride resin, and a manufacturing method thereof. The powdered polymeric lubricant having multi-layer structure according to the present invention has an excellent ability to prevent its adhesion to a metal surface upon its processing so as to give a long-term workability to extrusion, calendaring, blow molding, injection molding, etc., when a small amount of the powder of the present invention is mixed with a vinyl chloride resin. Accordingly, the present invention provides a powdered polymeric lubricant capable of controlling compatibility with the vinyl chloride resin and minimizing the adhesive property to a metal surface of a processing machine when a vinyl chloride resin is processed with a polymer including a silicone-based polymer.
    Type: Grant
    Filed: June 2, 2006
    Date of Patent: January 11, 2011
    Assignee: LG Chem, Ltd.
    Inventors: Hyung-jun Son, Jeong-heon Ahn, Yong-hun Lee, Jung-sup Han
  • Patent number: 7855257
    Abstract: A novel copolymer, graft copolymer, copolymer particles, flame retardant, and resin composition are provided. A copolymer including a polymer (A) segment having a glass transition temperature not more than ?10° C., and a polymer (C) segment having at least a unit derived from a monomer (B) which has two or more of aromatic rings and one or more radical reactive groups in one molecule; a graft copolymer having the component (B) grafted onto the component (A); and copolymer particles thereof are obtained. A flame retardant resin composition is obtained by using the copolymer as a flame retardant and blending the flame retardant with the resin.
    Type: Grant
    Filed: May 9, 2005
    Date of Patent: December 21, 2010
    Assignee: Kaneka Corporation
    Inventor: Kazunori Saegusa