From Fluorine-containing Monomer Patents (Class 524/544)
Fluorine-containing monomer contains f and c only or only f, c, and h (Class 524/545)
  • Fluoropolymer dispersion containing no or little low molecular weight fluorinated surfactant
    Patent number: 6861466
    Abstract: In an aspect of the invention, a fluoropolymer dispersion, preferably a PTFE dispersion, is provided that comprises fluoropolymer particles having an average particle size of 10 to 400 nm dispersed in water whereby the dispersion has an amount of solids between 35 and 70% by weight. The dispersion is free of fluorinated surfactant having a molecular weight of less than 1000 g/mol (hereinafter called low molecular weight fluorinated surfactant) or contains the low molecular weight fluorinated surfactant in an amount of not more than 0.05% by weight based on the total weight solids of the dispersion. The dispersion further comprises a non-ionic non-fluorinated surfactant or mixture of non-ionic non-fluorinated surfactants and one or more non-fluorinated anionic surfactants. Through the use of a non-fluorinated anionic surfactant, a dispersion is obtained that has a low viscosity at room temperature (20° C.).
    Type: Grant
    Filed: January 20, 2004
    Date of Patent: March 1, 2005
    Assignee: 3M Innovative Properties Company
    Inventors: Michael C. Dadalas, Leonard W. Harvey
  • Fluorochemical sulfonamide surfactants
    Patent number: 6852781
    Abstract: Described are fluorochemical surfactants derived from nonafluorobutanesulfonyl fluoride that contain polyalkyleneoxy side chains and may be copolymerized with acrylic acid or methacrylic acid to form polyacrylates or polymethacrylates. The surfactants surprisingly lower the surface tension of water and other liquids in the same or similar low values achieved by premier surfactants such as those derived from perfluorooctane sulfonyl fluoride.
    Type: Grant
    Filed: October 4, 2002
    Date of Patent: February 8, 2005
    Assignee: 3M Innovative Properties Company
    Inventors: Patricia M. Savu, Sandra A. Etienne
  • High dielectric constant composites of metallophthalaocyanine oligomer and poly(vinylidene-trifluoroethylene) copolymer
    Patent number: 6852416
    Abstract: There are disclosed new composite materials having improved electric field induced strain levels, improved electric constants, and having advantageous mechanical properties for use in electrical devices.
    Type: Grant
    Filed: April 12, 2002
    Date of Patent: February 8, 2005
    Assignee: The Penn State Research Foundation
    Inventors: Qiming Zhang, Zhongyang Cheng, Haisheng Xu
  • Method for stabilizing fluorocopolymers
    Patent number: 6846904
    Abstract: After a melt-processable fluorine-containing copolymer is heated and molten, the copolymer is reheatd in a closed apparatus under a non-static condition at a temperature of, for example, 130° C. to the melting point of the fluorine-containing polymer, whereby a content of volatile materials in the copolymer is reduced to 30% or less of an initial content of volatile materials. Thereby, the content of volatile materials in the melt-processable fluorine-containing copolymer, which has been once molten, can be effectively decreased without using a large apparatus while avoiding the contamination of the copolymer with foreign particles.
    Type: Grant
    Filed: August 24, 2000
    Date of Patent: January 25, 2005
    Assignee: Daikin Industries, Ltd.
    Inventors: Hiroyuki Imanishi, Yoshiyuki Hiraga, Masayuki Namimatsu, Satoshi Komatsu
  • Vinylidene fluoride resin compositions and articles molded therefrom
    Patent number: 6843948
    Abstract: A vinylidene fluoride resin composition which is stable to heat at molding temperatures and is free from foaming and coloration, and molded products made by forming the vinylidene fluoride resin composition are provided. The vinylidene fluoride resin composition may comprise 100 parts by weight of a vinylidene fluoride homopolymer; 2-20 parts by weight of a polyester plasticizer; 0.01-0.5 parts by weight of a phosphite compound; and a phenol compound.
    Type: Grant
    Filed: October 8, 2002
    Date of Patent: January 18, 2005
    Assignee: Kureha Chemical Industry Co., Ltd.
    Inventors: Seiichi Ohira, Kazuyuki Munakata, Toshiya Mizuno, Nobuyuki Masumura
  • Polytetrafluoroethylene dispersion for electroless nickel plating applications
    Patent number: 6837923
    Abstract: A low viscosity silicone glycol surfactant together with glycerin is added to a polytetrafluoroethylene dispersion for use with an electroless nickel plating bath. The improved plating bath produces a stable PTFE dispersion that continues to work as the plating bath ages and that produces an electroless nickel deposit with greater than 20 percent by volume of PTFE in the deposit.
    Type: Grant
    Filed: May 7, 2003
    Date of Patent: January 4, 2005
    Inventors: David Crotty, Jon Bengston
  • Cold shrink fluoroelastomeric article
    Patent number: 6838512
    Abstract: A cold shrink article including a fluoroelastomer composition comprising a first fluoroterpolymer having a weight average molecular weight centered from about 107 to about 108. A second fluoroterpolymer included in the fluoroelastomer composition has a weight average molecular weight centered at 104. The first fluoroterpolymer combines with the second fluoroterpolymer to provide a mixed terpolymer. Other components of the fluoroelastomer composition include a processing aid, a filler, an oil, and a curative. The fluoroelastomer composition upon curing at an elevated temperature provides the cold shrink article that has a permanent set value of 21% or less.
    Type: Grant
    Filed: June 5, 2003
    Date of Patent: January 4, 2005
    Assignee: 3M Innovative Properties Company
    Inventors: Robert E. Eggers, James C. Margl, Steven D. Yau
  • Fluorosulfonic acid organic polymers
    Publication number: 20040266924
    Abstract: The present invention provides for a composition and a process for forming the composition. The composition comprises an organic polymer and 0.
    Type: Application
    Filed: July 29, 2004
    Publication date: December 30, 2004
    Inventor: Zhenyu Yang
  • Adhesive composition
    Publication number: 20040266925
    Abstract: An adhesive composition contains specific amounts of a linear polyfluoro compound having at least two alkenyl groups and a main chain with a perfluoropolyether structure, a fluorine-bearing organohydrogensiloxane having at least two silicon-bonded hydrogens, a platinum group compound, a hydrophobic silica powder, an isocyanurate bearing at least lo one epoxy group and/or trialkoxysilyl group bonded indirectly to a nitrogen atom, and an organosiloxane bearing a silicon-bonded hydrogen and at least one epoxy group and/or trialkoxysilyl group indirectly bonded to a silicon atom. The composition, when heated for a short period of time, has an excellent adhesion to a broad range of substrates and provides a coat of uniform thickness.
    Type: Application
    Filed: June 8, 2004
    Publication date: December 30, 2004
    Inventor: Mikio Shiono
  • Resin compositions and uses thereof
    Publication number: 20040259994
    Abstract: The invention pertains to a resin composition comprising a polymer and a solvent, characterized in that the polymer is obtained by polymerizing the following monomers:
    Type: Application
    Filed: January 29, 2004
    Publication date: December 23, 2004
    Applicant: Eternal Chemical Co., Ltd.
    Inventors: Mao-Jung Yeh, Chun-Hsiung Chang
  • Aqueous dispersions of fluoropolymers
    Patent number: 6833403
    Abstract: Fluorine-containing emulsifiers can be removed from fluoropolymer dispersions by adding to the dispersion a nonionic emulsifier, removing the fluorine-containing emulsifier by contact with an anion exchanger and separating the dispersion from the anion exchanger. The resulting dispersions can be concentrated and used for coating applications.
    Type: Grant
    Filed: August 3, 2001
    Date of Patent: December 21, 2004
    Assignee: 3M Innovative Properties Company
    Inventors: Hermann Blädel, Klaus Hintzer, Gernot Löhr, Werner Schwertfeger, Reinhard Albert Sulzbach
  • Pigments and compositions for use in laser marking
    Patent number: 6825265
    Abstract: Pigments and compositions for use in laser marking. A colorless UV-absorbing pigment at least partially coated with a synergist has the formula [Rm(SiOn)]pR′q, wherein (a) m is 1 to 3, n is 1 to 3, p is at least 1, and q is 0 to 3, and (b) at least one R or R′ is a substituent that upon pyrolysis generates a black material suitable for providing a mark. Such pigments are useful in fluoropolymers used for wire and cable insulation.
    Type: Grant
    Filed: November 21, 2001
    Date of Patent: November 30, 2004
    Assignee: Tyco Electronics Corporation
    Inventors: Vijay Daga, Klaus J. Dahl
  • Process for reducing the amount of fluorinated surfactant in aqueous fluoropolymer dispersions
    Patent number: 6825250
    Abstract: The present invention provides a process of reducing the amount of fluorinated emulsifier in an aqueous fluoropolymer dispersion by contacting the aqueous fluoropolymer dispersion with an anion exchange resin in a non-fixed resin bed, the process comprising: (a) mixing the aqueous fluoropolymer dispersion with an effective amount of a surfactant so as to stabilize the fluoropolymer dispersion while being contacted with the anion exchange resin; (b) contacting the aqueous fluoropolyrner dispersion with an anion exchange resin by agitating the aqueous fluoropolymer dispersion with an effective amount of anion exchange resin for a time of less than 4 hours to reduce the amount of fluorinated emulsifier in the aqueous fluoropolymer dispersion to a desired level; and (c) separating the anion exchange resin from the aqueous fluoropolymer dispersion.
    Type: Grant
    Filed: May 5, 2003
    Date of Patent: November 30, 2004
    Assignee: 3M Innovative Properties Company
    Inventors: Rebekka Epsch, Klaus Hintzer, Gernot Löhr, Werner Schwertfeger
  • Levelling agent and anti-cratering agent
    Publication number: 20040236007
    Abstract: Use of a polymer as a levelling agent or anti-cratering agent, said polymer comprising at least one fluorinated unit represented by formula 1, (Formula 1) wherein R?1 is a moiety represented by Cn?F2n+1?-(CH2?)m?-, Cn?F2n?-(CH2?)m?-, Cn?F2n+1?-(CII2?)m?-(OCII2?CIIR?5)p?-, Cn?F2n?-(CH2?m?-(OCH2?CHR?5)p′? Cn?F2n+1?-(CII2?)m?-X-, ACn?F2n?-(CII2?)m?-X- &lgr;Cn?F2n?-(CH2?)m?-(OCH2?CHR?5)p?-X or ACn?F2n+1?-(CII2?)m?-(OCII2?CIIR?5)p?-X-; wherein A=H, Cl, Br, I, a C1-12? alkyl or a OC1-12 ?alkyl, wherein 4≦n≦20,0≦m˜≦4 and 0≦p≦20, wherein X is a spacer moiety selected from the group consisting of esters, amides, sulphoamides, mercapto groups, poltyurethane groups and alkyl groups, wher
    Type: Application
    Filed: April 6, 2004
    Publication date: November 25, 2004
    Inventors: Frank Olivier Heinrich Pirrung, Elizabeth Maaike Loen, Lothar Alexander Engelbrecht, Arend Noordam
  • Polymerization of fluoromonomers using a 3-allyloxy-2-hydroxy-1-propanesulfonic acid salt as surfactant
    Publication number: 20040225053
    Abstract: Fluoropolymers are prepared by a process comprising polymerizing at least one fluoromonomer in an aqueous reaction medium containing monomer, a radical initiator and a 3-allyloxy-2-hydroxy-1-propanesulfonic acid salt as surfactant. The medium may optionally contain one or more of an antifoulant, a buffering agent and a chain-transfer agent.
    Type: Application
    Filed: May 6, 2003
    Publication date: November 11, 2004
    Applicant: ATOFINA Chemicals, Inc.
    Inventors: Roice Andrus Wille, Lotfi Hedhli, Mehdi Durali, Sayed Youssef Antoun
  • Polytetrafluoroethylene dispersion for electroless nickel plating applications
    Publication number: 20040221765
    Abstract: A low viscosity silicone glycol surfactant together with glycerin is added to a polytetrafluoroethylene dispersion for use with an electroless nickel plating bath. The improved plating bath produces a stable PTFE dispersion that continues to work as the plating bath ages and that produces an electroless nickel deposit with greater than 20 percent by volume of PTFE in the deposit.
    Type: Application
    Filed: May 7, 2003
    Publication date: November 11, 2004
    Inventors: David Crotty, Jon Bengston
  • Surface-treatment agent comprising inorganic/organic hybrid material
    Patent number: 6811854
    Abstract: A surface treatment agent containing; (A) a metal alkoxide, and (B) a polymer comprising (B-i) a monomer having a carbon-carbon double bond and a metal alkoxide group, (B-ii) a fluorine-free (meth)acrylic acid derivative monomer, and (B-iii) a fluorine-containing compound having a functional group reactive with the metal alkoxide, or (B-iv) a fluorine-containing monomer having a carbon-carbon double bond, can impart durability maintaining sufficient water- and oil-repellency and soil releasability before and after cleaning.
    Type: Grant
    Filed: March 15, 2002
    Date of Patent: November 2, 2004
    Assignee: Daikin Industries, Ltd.
    Inventors: Kazuyuki Sato, Masamichi Morita, Fumihiko Yamaguchi, Yasushi Nakamae, Hiroko Yano
  • Aqueous fluoroelastomer curable composition and coated article
    Publication number: 20040214944
    Abstract: An aqueous fluoroelastomer curable composition having an aqueous fluoroelastomer dispersion and a basic polyol curing agent, and an article having a coating film formed from this composition. The aqueous fluoroelastomer curable composition has a long pot life although it is a one-fluid type aqueous dispersion, and forms a cured film having sufficient strength and heat resistance at a relatively low temperature in a short time.
    Type: Application
    Filed: May 25, 2004
    Publication date: October 28, 2004
    Applicant: Daikin Industries, Ltd.
    Inventors: Nobuyuki Tomihashi, Koichiro Ogita, Kiyotaro Terasaka, Yasukazu Nakatani
  • Low temperature, highly chemically resistant thermoplastic vulcanizates based on perfluroether elastomers
    Patent number: 6806306
    Abstract: A fluorine containing thermoplastic vulcanizate composition includes a continuous phase of at least one melt formable thermoplastic resin and a discrete phase of a vulcanized perfluoroether elastomer. The perfluoroether elastomer comprises between 10 and 80 weight percent based on the total amount of the continuous phase and the disperse phase combined.
    Type: Grant
    Filed: May 22, 2002
    Date of Patent: October 19, 2004
    Assignee: Freduenberg-NOK General Partnership
    Inventors: Craig A. Chmielewski, Paul J. Hochgesang
  • Resin composition, process for production thereof, and foam-insulated electric wire
    Publication number: 20040198886
    Abstract: The present invention provides a resin composition containing a filler poor in affinity for fluororesins as uniformly dispersed therein and a method of producing such resin composition and, further, a resin composition containing, as fillers, a nucleating agent for foaming and suited for producing foamed moldings with fine foam cells uniformly distributed therein and a method of producing such resin composition as well as a foamed molding formed from either of such resin compositions.
    Type: Application
    Filed: May 25, 2004
    Publication date: October 7, 2004
    Inventors: Keizou Shiotsuki, Eiji Fujita, Tatsuya Higuchi, Shouji Fukuoka, Takahiro Taira
  • Polytetrafluoroethylene fine powder, polytetrafluoroethylene formed article prepared form the same and method for preparation of the same
    Publication number: 20040197566
    Abstract: The present invention provides a polytetrafluoroethylene molded article, particularly a PTFE molded article for high-frequency insulation, which is excellent in various electric properties and mechanical properties in a high frequency range of 3 to 30 GHz. The present invention also provides PTFE fine powder, which is excellent in extrusion moldability and capable of providing the molded article, and a process for preparing the same. More specifically, the present invention relates to a polytetrafluoroethylene fine powder having a standard specific gravity of 2.180 to 2.225, which is obtained by contacting polytetrafluoroethylene fine powder having a standard specific gravity of 2.180 to 2.225 with a fluorine radical source, wherein tan &dgr; at 12 GHz of a film comprising the powder, which is obtained by cooling at 5 to 50° C./second after baking, is at most 2.0×10−4.
    Type: Application
    Filed: January 30, 2004
    Publication date: October 7, 2004
    Inventors: Tetsuo Shimizu, Michio Asano, Makoto Ono, Yoshinori Nanba, Shunji Kasai, Shinichi Yano, Hiroyuki Yoshimoto
  • INORGANIC METAL OXIDE/ORGANIC POLYMER NANOCOMPOSITES AND METHOD THEREOF
    Publication number: 20040198888
    Abstract: A synthetic method for preparation of hybrid inorganic/organic energetic nanocomposites is disclosed herein. The method employs the use of stable metal inorganic salts and organic solvents as well as an organic polymer with good solubility in the solvent system to produce novel nanocomposite energetic materials. In addition, fuel metal powders (particularly those that are oxophillic) can be incorporated into composition. This material has been characterized by thermal methods, energy-filtered transmission electron microscopy (EFTEM), N2 adsoprtion/desorption methods, and Fourier-Transform (FT-IR) spectroscopy. According to these characterization methods the organic polymer phase fills the nanopores of the composite material, providing superb mixing of the component phases in the energetic nanocomposite.
    Type: Application
    Filed: July 23, 2003
    Publication date: October 7, 2004
    Inventors: Alexander E. Gash, Joe H. Satcher, Randy Simpson
  • CTFE-based thermoprocessable compositions
    Publication number: 20040198894
    Abstract: A thermoprocessable polymeric composition formed by ethylene/chlorotrifluoroethylene copolymers containing from 0.5 to 20% by moles of ethylene, optionally in combination with the chlorotrifluoroethylene homopolymer, wherein the composition contains in total from 90 to 99.5% by moles of chlorotrifluoroethylene and from 0.5-10% by moles of ethylene; said polymeric composition having a second melting temperature (TmII) higher than 185° C., preferably higher than 200° C.
    Type: Application
    Filed: April 1, 2004
    Publication date: October 7, 2004
    Applicant: Solvay Solexis S.p.A.
    Inventors: Julio A. Abusleme, Claudia Manzoni, Mattia Bassi
  • Fluorine-containing compounds and polymers derived therefrom
    Patent number: 6800788
    Abstract: Provided are fluorine-containing compounds, and polymers derived therefrom, for use in compositions used for treating textile substrates. Also provided are methods of making fluorine-containing compounds and polymers derived therefrom, compositions comprising the compounds and/or polymers of the present invention, methods of treating substrates, and the treated products derived therefrom.
    Type: Grant
    Filed: June 18, 2002
    Date of Patent: October 5, 2004
    Assignee: Honeywell International Inc.
    Inventors: David Bradley, Jing Ji Ma, Haridasan K. Nair, David Nalewajek, Leonard M. Stachura, George Samuels, Michael Van Der Puy
  • Aqueous emulsion resin compositions
    Publication number: 20040192828
    Abstract: The present invention provides an aqueous emulsion resin composition which comprises:
    Type: Application
    Filed: December 23, 2003
    Publication date: September 30, 2004
    Inventors: Nobuo Mitsuhata, Tsunehiko Fuwa, Susumu Wada, Keiko Kunimasa, Haruhiko Mohri, Nobuo Fukita
  • Resin aqueous dispersion composition
    Publication number: 20040192829
    Abstract: The present invention provides a resin aqueous dispersion composition comprising one or at least two resin particles and water, wherein when supposing that a primary average particle of each resin particle is substituted with a sphere having the same volume, a nonionic surfactant is present in an amount which occupies 75 to 95 % of the theoretical void among resin particles of 26 % when each resin particle is arranged in a close packed structure and the nonionic surfactant is a solvent which is substantially nonvolatile in a temperature range of up to 100° C. and evaporates or thermally decomposes at a temperature lower than the thermal decomposition temperature of the resin particles. The resin aqueous dispersion composition can be coated thickly and can prevent development of mud crack.
    Type: Application
    Filed: January 29, 2004
    Publication date: September 30, 2004
    Inventors: Yoshihiro Soda, Nobuyuki Tomihashi, Hiromichi Momose, Koichiro Ogita
  • Fluoropolymer dispersions containing no or little low molecular weight fluorinated surfactant
    Publication number: 20040186219
    Abstract: The present invention provides a fluoropolymer dispersion comprising fluoropolymer particles having an average particle size of 10 to 400 nm dispersed in water whereby the dispersion is free of fluorinated surfactant having a molecular weight of less than 1000 g/mol or contains the fluorinated surfactant having a molecular weight of less than 1000 g/mol in an amount of not more than 0.025% by weight based on the total weight of solids in the dispersion. The dispersion further comprises a non-ionic surfactant and an anionic surfactant selected from fluorinated anionic surfactants having a molecular weight of at least 1000 g/mol, non-fluorinated anionic surfactants and mixtures thereof.
    Type: Application
    Filed: February 13, 2004
    Publication date: September 23, 2004
    Inventors: Michael C. Dadalas, Rebekka Epsch, Friedrich Kloos, Leonard W. Harvey
  • Water and oil repellent masonry treatments
    Publication number: 20040186254
    Abstract: The present invention provides a water-soluble and shelf-stable aqueous fluorochemical polymeric treatment useful to treat porous substrates to render them repellent to water- and oil-based stains. The treatment comprises a water-soluble or dispersible fluorochemical polymer containing only carbon atoms in the backbone, with a plurality of each of the following groups pendent from the backbone: (a) fluoroaliphatic groups, (b) carboxyl-containing groups, (c) silyl groups and optionally (d) other non-hydrophilic groups. Because the water-soluble polymeric treatment, and the shelf-stable aqueous solutions thereof, can be applied to porous substrates in aqueous solution, they eliminate the need for environmentally harmful and toxic co-solvents.
    Type: Application
    Filed: January 28, 2004
    Publication date: September 23, 2004
    Applicant: 3M Innovative Properties Company
    Inventors: Wayna W. Fan, Steven J. Martin
  • Method of making an aqueous dispersion of fluoropolymers
    Patent number: 6794550
    Abstract: The invention provides a process for removing steam-volatile fluorinated emulsifiers in their free acid form, from aqueous fluoropolymer dispersions. The process comprises adding a nonionic emulsifier, to the aqueous fluoropolymer dispersion and, at a pH-value of the aqueous fluoropolymer dispersion below 5, removing steam-volatile fluorinated emulsifier by distillation until the concentration of steam-volatile fluorinated emulsifier in the dispersion reaches the desired value.
    Type: Grant
    Filed: August 28, 2001
    Date of Patent: September 21, 2004
    Assignee: 3M Innovative Properties Company
    Inventors: Klaus Hintzer, Gernot Löhr, Albert Killich, Werner Schwertfeger
  • Coagents for fluoroelastomer free radical-curable compositions
    Patent number: 6794455
    Abstract: Crosslinking coagents based on aromatic diimides having N-substituted allyl groups are employed in place of triallyl isocyanurate (TAIC) for the free radical curing of fluoroelastomers. The diimide coagents mix more easily with fluoroelastomers and are less likely to homopolymerize than TAIC. Thus mold fouling and sticking due to low molecular weight polymers of coagent is greatly reduced.
    Type: Grant
    Filed: December 12, 2002
    Date of Patent: September 21, 2004
    Assignee: DuPont Dow Elastomers
    Inventor: Ming-Hong Hung
  • Fluorine-containing copolymer, composition for forming a film, anti-reflection film, and image display device
    Patent number: 6794469
    Abstract: A fluorine-containing copolymer of the following formula. A film-forming composition containing the copolymer. An anti-reflection film having a low-refractive-index layer containing the copolymer. An anti-reflection film having the above anti-reflection film on a transparent support. An image display device having the anti-reflection film.
    Type: Grant
    Filed: April 12, 2002
    Date of Patent: September 21, 2004
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Tatsuhiko Obayashi, Hirohisa Hokazono, Takafumi Hosokawa
  • Preparation of fluorinated core-shell particles with water and oil repellency
    Patent number: 6790898
    Abstract: The present invention relates to preparation of fluorinated core-shell particles with water and oil repellency, and more particularly, to preparation of emulsion-type coating material with good water and oil repellency using only small amount of expensive fluorinated monomers, which comprise a shell wherein a large amount of hydrophobic fluorinated monomers are included and a core wherein no fluorinated monomers are included.
    Type: Grant
    Filed: December 2, 2002
    Date of Patent: September 14, 2004
    Assignee: Korea Research Institute of Chemical Technology
    Inventors: Soo-Bok Lee, In Jun Park, Dong-Kwon Kim, Jeong-Hoon Kim, Kwang Won Lee, Jong-Wook Ha
  • Amine oxide coating compositions
    Publication number: 20040171734
    Abstract: An aqueous coating composition is provided comprising carbon particles, one or more highly fluorinated polymers and one or more amine oxide surfactants, typically an amine oxide surfactant according to formula I: 1
    Type: Application
    Filed: March 8, 2004
    Publication date: September 2, 2004
    Applicant: 3M Innovative Properties Company
    Inventors: Klaus Hintzer, Armin Steurer, Dieter Birkhorst, James Michael Larson, Joseph William Frisk, Wayne Meredith Boand
  • Fluoropolymer dispersion containing no or little low molecular weight fluorinated surfactant
    Publication number: 20040171736
    Abstract: In an aspect of the invention, a fluoropolymer dispersion, preferably a PTFE dispersion, is provided that comprises fluoropolymer particles having an average particle size of 10 to 400 nm dispersed in water whereby the dispersion has an amount of solids between 35 and 70% by weight. The dispersion is free of fluorinated surfactant having a molecular weight of less than 1000 g/mol (hereinafter called low molecular weight fluorinated surfactant) or contains the low molecular weight fluorinated surfactant in an amount of not more than 0.05% by weight based on the total weight solids of the dispersion. The dispersion further comprises a non-ionic non-fluorinated surfactant or mixture of non-ionic non-fluorinated surfactants and one or more non-fluorinated anionic surfactants. Through the use of a non-fluorinated anionic surfactant, a dispersion is obtained that has a low viscosity at room temperature (20° C.).
    Type: Application
    Filed: January 20, 2004
    Publication date: September 2, 2004
    Applicant: 3M Innovative Properties Company
    Inventors: Michael C. Dadalas, Leonard W. Harvey
  • Durable water repellent and coated articles
    Patent number: 6784239
    Abstract: A durable water repellent agent comprising a repellent and a fluorine-containing resin, wherein the repellent comprises at least one member selected from the group consisting of a perfluoroalkyl group-containing substance (I), a fluorine-containing surfactant (II), a fluorine-containing oil (III), a fluorosilicone oil (IV) and a silicone oil (V), the solid content weight ratio between said repellent and said fluorine-containing resin being (repellent):(fluorine-containing resin)=50:50 to 99:1.
    Type: Grant
    Filed: March 15, 2002
    Date of Patent: August 31, 2004
    Assignee: Daikin Industries, Ltd.
    Inventors: Susumu Wada, Kayoko Honda, Keiko Kunimasa, Katsuhiko Imoto
  • Purification process of thermoprocessable tetrafluoroethylene copolymers
    Publication number: 20040167272
    Abstract: A purification process of thermoprocessable tetrafluoroethylene (TFE) copolymers comprising the following steps:
    Type: Application
    Filed: March 3, 2004
    Publication date: August 26, 2004
    Applicant: Ausimont S.p.A.
    Inventors: Hua Wu, Vincenzo Arcella
  • Process for making a fluoroelastomer
    Publication number: 20040167290
    Abstract: Aqueous microemulsions obtained from a perfluorinated alkane sulphonic or carboxylic acid or salt thereof, a liquid fluorinated monomer comprising a cure-site and optionally an inert liquid and highly fluorinated hydrocarbon compound. The aqueous microemulsion may be formed by mixing together water, a perfluorinated alkane sulphonic or carboxylic acid or salt thereof, optionally an inert liquid and highly fluorinated hydrocarbon compound and a liquid fluorinated monomer having a cure-site.
    Type: Application
    Filed: July 25, 2003
    Publication date: August 26, 2004
    Applicant: 3M Innovative Properties Company
    Inventors: Werner M.A. Grootaert, Klaus Hintzer, Bernhard Hirsch, Harald Kaspar, Robert E. Kolb, Gernot Lohr, Werner Schwertfeger
  • Process for producing fluoroelastomers with fluorinated anionic surfactants
    Patent number: 6774164
    Abstract: A novel emulsion polymerization process for the production of fluoroelastomers is disclosed wherein a partially fluorinated anionic surfactant of the formula F—(CF2CF2)n—CH2CH2SO3M, where n is an integer from 2 to 9, or mixtures thereof, and M is a cation having a valence of 1, is used as the dispersing agent.
    Type: Grant
    Filed: August 24, 2001
    Date of Patent: August 10, 2004
    Assignee: DuPont Dow Elastomers L.L.C.
    Inventors: Donald Frederick Lyons, Albert Lloyd Moore, Phan Linh Tang
  • Tinted, high Dk ophthalmic molding and a method for making same
    Patent number: 6774178
    Abstract: The invention relates to ophthalmic molding formulations and to tinted, high Dk ophthalmic moldings. This invention also relates to a method for making a tinted ophthalmic molding. The method comprises: (a) providing a polymer precursor having cross-linkable or polymerizable groups; (b) providing a pigment dispersion comprising an inorganic or organic pigment and a dispersing agent; (c) mixing the pigment dispersion with the polymer precursor to form a tinted prepolymer mixture; (d) dispensing the tinted prepolymer mixture into a mold; and (e) forming a tinted ophthalmic molding from the tinted prepolymer mixture, the molding comprising a polymer matrix having the pigment entrapped therein. With this method, tinted ophthalmic moldings, particularly edge-to-edge soft, tinted contact lenses having improved properties, are prepared with an improved efficiency.
    Type: Grant
    Filed: December 14, 2001
    Date of Patent: August 10, 2004
    Assignee: Novartis AG
    Inventors: Richard Charles Turek, Jacalyn Mary Schremmer
  • Polymers fluorinated by polymerization in mini-emulsion
    Patent number: 6774176
    Abstract: The invention discloses a process for the preparation of fluorinated polymers by miniemulsion polymerization of a mixture of fluorinated and nonfluorinated monomers in the absence of organic solvent. This polymerization process makes it possible to obtain an aqueous emulsion of fluorinated polymers devoid of coagulum.
    Type: Grant
    Filed: August 14, 2001
    Date of Patent: August 10, 2004
    Assignee: E. I. du Pont de Nemours and Company
    Inventors: Dennis Tembou Nzudie, Didier Juhue, Jean-Marc Corpart
  • Plasma resistant elastomer parts
    Publication number: 20040152827
    Abstract: Elastomeric parts having a magnetic flux density of at least 10 gauss on their surface deflect a portion of reactive plasmas from contact with the surface of the parts. Thus, such parts may be exposed to reactive plasmas for longer periods, with less degradation, than may similar elastomer parts that do not have such a magnetic flux density on their surface.
    Type: Application
    Filed: October 20, 2003
    Publication date: August 5, 2004
    Inventors: Kaori Iwamoto, Bunichi Rai, Shinichi Sogo
  • Water-and-oil repellant composition with improved suitability for cold cure
    Publication number: 20040147665
    Abstract: A fluoropolymer-based water-and-oil repellant composition which comprises a copolymer comprising units derived from (a) an ethylenic monomer having a perfluoroalkyl group, (b) an ethylenic monomer having a group comprising an aromatic ring and a halogen atom or halogenomethyl group bonded thereto, and (c) an ethylenic monomer copolymerizable with these. The composition imparts excellent water and oil repellency through cold cure.
    Type: Application
    Filed: January 16, 2004
    Publication date: July 29, 2004
    Inventors: Takuya Yoshioka, Masato Kashiwagi
  • Aqueous fluoropolymer dispersion comprising a melt processible fluoropolymer and having a reduced amount of fluorinated surfactant
    Publication number: 20040143052
    Abstract: The present invention provides an aqueous fluoropolymer dispersion comprising a melt processible fluoropolymer in an amount of at least 25% by weight based on the weight of the aqueous fluoropolymer dispersion and a fluorinated surfactant having a molecular weight of not more than 1000 g/mol in an amount of not more than 100 ppm, preferably less than 50 ppm, more preferably less than 25 ppm and most preferably less than 10 ppm based on the weight of fluoropolymer solids or being free of said fluorinated surfactant. The aqueous fluoropolymer dispersion has a conductivity of at least 200 82 S/cm, preferably at least 500 &mgr;S/cm and more preferably at least 1000 &mgr;S/cm.
    Type: Application
    Filed: December 1, 2003
    Publication date: July 22, 2004
    Applicant: 3M Innovative Properties Company
    Inventors: Rebekka Epsch, Friedrich Kloos, Gernot Lohr
  • Fluoropolymer sealant
    Publication number: 20040138372
    Abstract: A heat sealable tape of a copolymer of tetrafluoroethylene and at least about 15% by weight of a highly fluorinated monomer. The copolymer has a melt viscosity of no greater than about 1000 Pa.S at 372° C. and an application temperature of no greater than about 250° C. The invention further provides for a seam formed from two sections of sheet material, especially fabric, wherein each sheet has at least one fluoropolymer surface. The sections are sealed one to the other by application of heat sealable composition over one fluoropolymer surface of each section. The heat sealable composition comprises a copolymer of tetrafluoroethylene and at least about 15% by weight of a highly fluorinated monomer, the copolymer having a melt viscosity of no greater than about 1000 Pa.S at 372° C. and an application temperature of no greater than about 250° C.
    Type: Application
    Filed: December 5, 2003
    Publication date: July 15, 2004
    Inventors: Ronald Earl Uschold, Sina Ebnesajjad
  • Rotolining process
    Publication number: 20040137145
    Abstract: The present invention relates to (a) the rotolining of the interior surface of a hollow article with tetrafluoroethylene/perfluoro(alkyl vinyl ether copolymer in a multicoat system, in which the undercoat also contains a powder additive, and the overcoat is preferably stabilized copolymer to form a bubble-free coating thicker than the undercoat, (b) embodiments in which the undercoat is stabilized or unstabilized copolymer, (c) use of the undercoat as a single coat system, (d) the composition for forming a bubble-free coating that adheres to the surface, arising from the presence of adhesion-promoting, non-bubble promoting metal powder being present in the composition.
    Type: Application
    Filed: November 21, 2003
    Publication date: July 15, 2004
    Inventor: Jacob Lahijani
  • Method for preparing imides from sulfonyl fluorides
    Patent number: 6759477
    Abstract: This invention discloses a method for preparing imides (I) and (II) from compounds having a sulfonyl fluoride functional group. The imides so prepared are useful in a variety of catalytic and electrochemical applications.
    Type: Grant
    Filed: May 1, 2002
    Date of Patent: July 6, 2004
    Assignee: E. I. du Pont de Nemours and Company
    Inventor: Hanne Anna Katharina Blau
  • Curable fluoropolyether base rubber compositions
    Patent number: 6759468
    Abstract: A fluoropolyether base rubber composition comprising (A) a linear fluoropolyether compound containing at least two alkenyl groups and having a perfluoroalkyl ether structure in its backbone, (B) a surface hydrophobized silica filler having a specific surface area of at least 100 m2/g and a vinyl content of 1×10−3 to 2×10−2 mol/100 g, (C) a curing amount of an organosilicon compound having at least two SiH groups, and (D) a hydrosilylation catalyst is curable into products having improved compression set as well as water repellency, oil repellency, solvent resistance, chemical resistance and weather resistance and finding typical use as O-rings.
    Type: Grant
    Filed: November 29, 2001
    Date of Patent: July 6, 2004
    Assignee: Shin-Etsu Chemical Co., Ltd.
    Inventors: Makoto Sato, Shinichi Sato
  • Flexible thermal control composite
    Patent number: 6759476
    Abstract: A flexible thermal control composite comprising a natural or synthetic polymer and an endotherm dispersed, distributed and suspended within said natural or synthetic polymer i.e. “P”olymer “C”ontaining an “E”ndothermic “A”gent (PCEA). The PCEA can be formed into thin and thick films. It can be drawn, molded, extruded and spun into fibers or all dimensions. It can be formed and chopped into PCEA mulch. Irrespective its final form, the PCEA can be used in insulating, thermoprotecting, heat absorbing applications on the one hand, and heat maintenance applications of all types on the other.
    Type: Grant
    Filed: July 13, 2000
    Date of Patent: July 6, 2004
    Inventor: Claude Q. C. Hayes
  • Perfluorostyrene compound, and coating solution and optical waveguide device using the same
    Publication number: 20040127632
    Abstract: Disclosed is a fluorine compound having perfluorostyrene introduced at a terminal thereof, as represented in the following Formula 1, and a coating solution and an optical waveguide device using the same, characterized in that the introduction of perfluorostyrene results in a facile fabrication of thin films by a UV curing or a thermal curing, high thermal stability and chemical resistance, and low optical propagation loss and birefringence: 1
    Type: Application
    Filed: July 10, 2003
    Publication date: July 1, 2004
    Applicant: ZEN PHOTONICS CO., LTD.
    Inventors: Ji-Hyang Kim, Jae-Il Kim, Tae-Kyun Kim, Hyung Jong Lee, Seon Gyu Han
  • Aqueous water-and oil-repellent dispersion
    Patent number: 6753376
    Abstract: An aqueous water- and oil-repellent dispersion containing: (A) a homopolymer or copolymer containing at least one polymerizable compound having a perfluoroalkyl or perfluoroalkenyl group and an acrylate or methacrylate group, or a copolymer containing said polymerizable compound and another compound copolymerizable therewith, (B) an organic solvent which is tripropylene glycol, and (C) a surfactant, has durable water- and oil-repellency and excellent storage stability.
    Type: Grant
    Filed: July 31, 2001
    Date of Patent: June 22, 2004
    Assignee: Daikin Industries Ltd.
    Inventors: Masayuki Yamana, Tsukasa Aga, Masahiro Miyahara, Masaki Fukumori, Ryosuke Hara