Fluorine Containing Monomer Is An Ether Patents (Class 526/247)
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Patent number: 6489420Abstract: A fluoropolymer composition is provided. The polymer comprises interpolymerized units derived from (i) tetrafluoroethylene, (ii) vinylidene fluoride, (iii) at least one ethylenically unsaturated monomer of the formula CF2═CFRf where Rf is a perfluoroalkyl or a perfluoroalkoxy of 1 to 8 carbon atoms, and (iv) a perfluorovinyl ether of the formula CF2═CF—(OCF2CF(Rf))aOR′f where Rf is as described in (iii), R′f is a perfluoroaliphatic, preferably a perfluoroalkyl or a perfluoroalkoxy, of 1 to 8, preferably 1 to 3, carbon atoms, and a has a value of 0 to 3.Type: GrantFiled: June 27, 2000Date of Patent: December 3, 2002Assignee: Dyneon LLCInventors: Denis Duchesne, Harald Kaspar, Lisa P. Chen, Klaus Hintzer, Attila Molnar, Ludwig Mayer, Gernot Löhr
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Patent number: 6486280Abstract: Disclosed herein are novel amorphous tetrafluoroethylene-hexafluoropropylene (TFE-HFP) dipolymers, and other copolymers containing TFE, HFP and a third monomer, many of which are more random than previous amorphous TFE-HFP copolymers, as well as a novel high productivity continuous process for making these polymers. The polymers are particularly useful in the form of coatings, films and encapsulants.Type: GrantFiled: July 14, 2000Date of Patent: November 26, 2002Assignee: E. I. du Pont de Nemours and CompanyInventors: Colin Anolick, Viacheslav Alexandrovich Petrov, Bruce Edmund Smart, Charles Winfield Stewart, Robert Clayton Wheland, William Brown Farnham, Andrew Edward Feiring, Weiming Qiu
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Patent number: 6479591Abstract: Fine powders of modified PTFE having a “core-shell” structure; the fine powder being formed by: a “core” of tetrafluoroethylene (TFE) modified by one or more monomers selected from: a) dioxoles; b) one or more perfluorinated monomers which cyclize during the polymerization; a “shell” of TFE modified by perfluoropropene (PFP); the amount, referred to the total core+shell particle, of comonomers 1) in the “core” being in the range 0.01-0.06% by weight; the amount, referred to the total core+shell particle, of perfluoropropene 2) in the “shell” being in the range 0.002-0.06% by weight; the thermal instability index (TII) of the fine powder being equal to or lower than 5, determined according to ASTM D4895.Type: GrantFiled: July 19, 2001Date of Patent: November 12, 2002Assignee: Ausimont S.p.A.Inventors: Valery Kapeliouchko, Enrico Marchese
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Patent number: 6479578Abstract: A resin composition which gives a molded article having both of excellent mechanical properties and abrasion resistance with maintaining excellent thermal resistance, chemical resistance, surface characteristics (non-sticking property, low friction property), electric insulating property, etc. of a fluorine-containing polymer; a molded article obtained from the resin composition; and a method for producing the molded article are provided. The resin composition comprises: (A-1) a fluorine-containing ethylenic polymer prepared by copolymerizing at least one of fluorine-containing monomers having any one of hydroxyl, carboxyl, a carboxylate salt group, a carboxylate ester group or epoxy in an amount of 0.05 to 30% by mole on the basis of the total amount of monomers, and (B-1) an inorganic filler or a non-meltable organic filler, wherein said resin composition comprises 1 to 99.5% by weight of the component (A-1) and 0.5 to 99% by weight of the component (B-1).Type: GrantFiled: March 5, 2001Date of Patent: November 12, 2002Assignee: Daikin Industries, Ltd.Inventors: Takayuki Araki, Masahiro Kumegawa, Tsuyoshi Miyamori, Masami Kato, Masaji Komori, Taketo Kato, Tetsuo Shimizu
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Patent number: 6476144Abstract: Spherulites in a molded article obtained from a melt-processable crystalline fluorine-containing resin composition are minimized to give the transparent molded article having a smooth surface and being resistant to contamination. An agent for minimizing spherulite size which comprises an amorphous fluorine-containing polymer or a fluorine-containing multi-segment polymer. The fluorine-containing multi-segment polymer comprises an amorphous segment and a crystalline segment.Type: GrantFiled: January 28, 2000Date of Patent: November 5, 2002Assignee: Daikin Industries, Ltd.Inventors: Ken Okanishi, Minoru Yoshida, Tatsuo Suzuki, Tetsuo Shimizu, Takahisa Aoyama
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Patent number: 6469116Abstract: Amorphous fluoropolymer selfsupported manufactured articles obtained by casting from solution in a single step, characterized in that they are obtained by the polymerization of a structure (I), optionally and preferably with a monomer having a structure (II): CF2=CY1Y2 (II) wherein: Rf is a C1-C5 perfluoroalkyl radical; X1 and X2 are selected from F and CF3; Y1 and Y2 are selected from F, Cl, H, CF3, ORf; having refractive index lower than 1.35, transmittance higher than 90% in the radiation field 300-2,000 nm wave length, and thickness higher than 20-25 &mgr;m.Type: GrantFiled: June 28, 1999Date of Patent: October 22, 2002Assignee: Ausimont S.p.A.Inventors: Patrizia Maccone, Vincenzo Arcella, Giuseppina Grippaldi, Enrico Drioli
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Publication number: 20020151664Abstract: Chain transfer agents that are chlorine-free and liquid under polymerization conditions, useful for fluoromonomer polymerization, have the following structure:Type: ApplicationFiled: April 11, 2002Publication date: October 17, 2002Inventors: William Brown Farnham, Andrew Edward Feiring, Patrick Edward Lindner
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Patent number: 6465577Abstract: Spherulites in a molded article obtained from a melt-processable crystalline fluorine-containing resin composition are minimized to give the transparent molded article having a smooth surface and being resistant to contamination. An agent for minimizing spherulite size which comprises an amorphous fluorine-containing polymer or a fluorine-containing multi-segment polymer. The fluorine-containing multi-segment polymer comprises an amorphous segment and a crystalline segment.Type: GrantFiled: April 11, 2001Date of Patent: October 15, 2002Assignee: Daikin Industries, Ltd.Inventors: Ken Okanishi, Minoru Yoshida, Tatsuo Suzuki, Tetsuo Shimizu, Takahisa Aoyama
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Patent number: 6465576Abstract: A fluoroelastomer composition having improved compression set. The fluoroelastomer composition comprises: (1) a fluoroelastomer containing interpolymerized units of at least one perfluoroolefin, at least one perfluorovinyl ether, and a cure site component capable of participation in a peroxide cure reaction; (2) an additive selected from the group consisting of organo-oniums, phosphates, phosphine oxides, amine oxides, alkyl amines, and heterocyclic amines and salts of heterocyclic amines; (3) a peroxide curative, and (4) optionally a coagent.Type: GrantFiled: June 30, 2000Date of Patent: October 15, 2002Assignee: Dyneon LLCInventors: Werner M. A. Grootaert, Robert E. Kolb
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Publication number: 20020132947Abstract: Melt-processible, thermoplastic poly(tetrafluoroethylene) (PTFE) compositions are disclosed and methods for making and processing same. Additionally, products comprising these compositions are described.Type: ApplicationFiled: January 31, 2002Publication date: September 19, 2002Inventors: Paul Smith, Jeroen Visjager, Cees Bastiaansen, Theodorus Tervoort
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Publication number: 20020128411Abstract: Perfluorodiacylperoxides having the following structures: 1Type: ApplicationFiled: March 4, 2002Publication date: September 12, 2002Applicant: Ausimont S.p.A.Inventors: Walter Navarrini, Marco Galimberti
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Patent number: 6437066Abstract: Disclosed herein is a novel class of fluorovinyl ether monomers which are useful as cure site monomers in fluoroelastomers, a process for the preparation of these fluorovinyl ether monomers, and fluoroelastomer copolymer compositions that contain copolymerized units of these fluorovinyl ether monomers.Type: GrantFiled: October 9, 2001Date of Patent: August 20, 2002Assignee: DuPont Dow Elastomers, L.L.C.Inventors: Ming-Hong Hung, Walter W Schmiegel
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Patent number: 6436606Abstract: Polymers comprising recurring units of formula (1) and recurring units having acid labile groups are novel. At least one of R1 and R2 is fluorine or a trifluoromethyl group, and the remainder is hydrogen or a C1-20 alkyl, R3 and R4 each are hydrogen or an unsubstituted or fluorine-substituted C1-20 alkyl, or R3 and R4 may form a ring. Using such polymers, resist compositions featuring transparency to excimer laser light and alkali solubility are obtained.Type: GrantFiled: August 29, 2000Date of Patent: August 20, 2002Assignee: Shin-Etsu Chemical Co., Ltd.Inventors: Jun Hatakeyama, Jun Watanabe, Yuji Harada
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Patent number: 6429271Abstract: Copolymers having copolymerized units of vinylidene fluoride, perfluoro(alkyl vinyl) ether, 2-hydropentafluoropropene, and, optionally, tetrafluoroethylene, exhibit excellent low temperature properties and processability when cured with polyhydroxy compounds or amines.Type: GrantFiled: September 20, 2001Date of Patent: August 6, 2002Assignee: DuPont Dow Elastomers, L.L.C.Inventor: Walter Werner Schmiegel
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Patent number: 6426397Abstract: Ionic perfluorovinyl compounds and their uses as components of ionic conductors of the polymer type, of selective membranes or of catalysts. The compounds comprise at least one perfluorovinyl group and at least one group chosen from —O or one of the groups C≡N, —C(C≡N)2, —NSO2R or —C[SO2R]2 or a pentacyclic group comprising at least one N, C—C≡N, CR, CCOR or CSO2R group. The compounds and/or their polymers are of use in the preparation of ionically conducting materials, electrolytes and selective membranes.Type: GrantFiled: July 5, 2001Date of Patent: July 30, 2002Assignees: ACEP Inc., Centre National de la Recherche Scientifique, Universite de MontrealInventors: Michel Armand, Christophe Michot
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Patent number: 6423798Abstract: Novel copolymers of fluorinated olefins and maleic anhydride, maleic acid, dichloromaleic anhydride or dichloromaleic acid may be made by using as solvents for the maleic anhydride or acid a perfluorinated alkyl carboxylic acid, or liquid or supercritical hexafluoropropylene or carbon dioxide. The resulting polymers are useful as adhesives or compatibilizing agents for fluoropolymers, and in coatings.Type: GrantFiled: February 14, 2001Date of Patent: July 23, 2002Assignee: E. I. du Pont de Nemours and CompanyInventors: Robert Clayton Wheland, Paul Douglas Brothers, Colin Anolick, Charles W. Stewart, Sr.
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Patent number: 6416698Abstract: Beads of melt-fabricable fluoropolymer dispersion particles are produced by a solvent-aided pelletization process using fluorinated solvent containing ether oxygen.Type: GrantFiled: January 18, 2000Date of Patent: July 9, 2002Assignee: E. I. du Pont de Nemours and CompanyInventor: Cynthia Asli Mertdogan
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Patent number: 6403740Abstract: Interpolymers of 1-99 mol % vinyl fluoride and 99-1 mol % of at least one highly fluorinated monomer such as tetrafluoroethylene are disclosed. The interpolymers are characterized by the presence of ionic end groups and are prepared by polymerizing VF and fluorinated monomer in water with water-soluble free-radical initiators such as azoamidine initiators or persulfate initiators at temperatures within the range of 60 to 100° C. and reactor pressures within the range of 1 to 12 MPa (145 to 1760 psi). The invention firer provides for protective self-supporting films and coatings formed from nonaqueous dispersions of the interpolymers, both for use on the surfaces of substrates including metal, plastic, ceramic, glass, concrete, fabric and wood.Type: GrantFiled: April 13, 1998Date of Patent: June 11, 2002Assignee: E. I. du Pont de Nemours and CompanyInventor: Ronald Earl Uschold
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Patent number: 6403744Abstract: The invention relates to a fluorine-containing copolymer. This copolymer contains 1-99 mol % of a special first repeating unit of a cyclic perfluoro group; and 99-1 mol % of a second repeating unit of a bivalent organic group. The copolymer has a number average molecular weight of from 1,000 to 1,000,000 determined in a gel permeation chromatography using polystyrene as a standard material thereof. The invention further relates to a composition for forming a low reflectance film. This composition contains as a film-forming component a fluorine-containing polymer containing the first repeating unit. This polymer can be the above copolymer. A film formed by applying the composition to a substrate provides low reflectance and is improved in hardness.Type: GrantFiled: August 17, 2000Date of Patent: June 11, 2002Assignee: Central Glass Company, LimitedInventors: Shuyo Akama, Hiromi Sugimoto, Kentaro Tsutsumi
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Publication number: 20020065383Abstract: Amorphous fluoropolymer selfsupported manufactured articles obtained by casting from solution in a single step, characterized in that they are obtained by the polymerization of a structure (I), optionally and preferably with a monomer having a structure (II): 1 CF2=CY1Y2 (II)Type: ApplicationFiled: June 28, 1999Publication date: May 30, 2002Inventors: PATRIZIA MACCONE, VINCENZO ARCELLA, GIUSEPPINA GRIPPALDI, ENRICO DRIOLI
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Publication number: 20020065382Abstract: This invention relates to high molecular weight perfluorocyclobutane polymers and methods of polymerizing trifluorovinyl monomers to form high molecular weight perfluorocyclobutane polymers in the presence of a catalyst or initiator.Type: ApplicationFiled: November 30, 2000Publication date: May 30, 2002Applicant: 3M Innovative Properties CompanyInventors: Shane S. Mao, Allen Raymond Siedle
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Patent number: 6395851Abstract: The present invention is directed to copolymers of norbornene and functional group containing norbornene comonomers and processes for the preparation thereof. These polymers may be random, alternating or block copolymers or terpolymers, etc.Type: GrantFiled: June 9, 2000Date of Patent: May 28, 2002Assignee: Eastman Chemical CompanyInventors: Gino Georges Lavoie, Peter Borden Mackenzie
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Patent number: 6395838Abstract: The present invention is directed to a method for forming graft copolymers from perfluoroolefins and perfluorovinyl ethers having fluorosulfonyl and fluorosulfonate functionality with selected polymers, and the uncrosslinked graft copolymers resulting therefrom.Type: GrantFiled: January 16, 2001Date of Patent: May 28, 2002Assignee: E. I. du Pont de Nemours and CompanyInventor: José Rodriguez-Parada
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Publication number: 20020058198Abstract: The present invention includes polymers and photoresist compositions that comprise the polymers as a resin binder component. Photoresists of the invention contain a polymer that has fluorinated phenolic units and photoacid-labile groups. Resists of the invention can be effectively imaged at short wavelengths such as sub-200 nm, particularly 157 nm.Type: ApplicationFiled: September 8, 2001Publication date: May 16, 2002Applicant: Shipley Company, L.L.C.Inventors: Axel Klauck-Jacobs, Anthony Zampini, Sungseo Cho, Shintaro Yamada
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Patent number: 6388033Abstract: A process for preparing a fluoropolymer by the batchwise polymerization of a monomer mixture containing tetrafluoroethylene, in which, after the initiation of a reaction, the monomers are reacted under conditions such that the monomer mixture is supplemented to a polymerization system in an amount more than the amount of the monomers consumed and simultaneously the excessive unreacted monomers are discharged from the polymerization system to maintain the monomer composition in the polymerization system substantially the same as that of the composition of the monomer mixture initially charged, and the monomer mixture supplemented to the polymerization system contains a compound suppressing the autoexplosion of the monomers.Type: GrantFiled: February 28, 2001Date of Patent: May 14, 2002Assignee: Daikin Industries, Ltd.Inventors: Tomohisa Noda, Satoshi Komatsu
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Patent number: 6383633Abstract: A fluorochemical composition is described comprising a polymer derived from a fluorochemical urethane (meth)acrylate monomer. The fluorochemical composition is useful for imparting stain release properties to a substrate.Type: GrantFiled: September 24, 1999Date of Patent: May 7, 2002Assignee: 3M Innovative Properties CompanyInventors: Kathy E. M. L. A. Allewaert, Pierre J. Vander Elst
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Patent number: 6380313Abstract: A polymer processing aid composition, a melt processable polymer composition that uses the polymer processing aid, and a method of improving the melt processability of a thermoplastic polymer are provided. The polymer processing aid composition comprises a fluoropolymer that comprises interpolymerized units derived from a perfluorovinyl ether, preferably one having the formula CF2═CF—(OCF2CF(CF3))AORf where a has a value of 0 to 3 and Rf is a perfluoroaliphatic (preferably perfluoroalkyl or perfluoroalkoxy) having from 1 to 8 (preferably 1 to 3) carbon atoms.Type: GrantFiled: June 27, 2000Date of Patent: April 30, 2002Assignee: Dyneon LLCInventors: Maria P. Dillon, Harald Kaspar, Bernhard Hirsch, Klaus Hintzer, Karl-Dieter Weilandt
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Patent number: 6380337Abstract: A fluoroelastomer comprising constituent units derived from vinylidene fluoride (a) and constituent units derived from perfluoro(methoxypropyl vinyl ether) (b), optionally together with constituent units derived from tetrafluoroethylene (c) and/or constituent units derived from a perfluoroalkyl vinyl ether (d), wherein the constituent units (a) are contained in an amount of 65 to 85 mol %, the constituent units (b) in an amount of 0.5 to 30 mol %, the constituent units (c) in an amount of 0 to 10 mol % and the constituent units (d) in an amount of 0 to 25 mol %. The fluoroelastomer can be produced by a process comprising copolymerizing vinylidene fluoride and perfluoro(methoxypropyl vinyl ether), optionally together with tetrafluoroethylene and/or a perfluoroalkyl vinyl ether, in the presence of an iodated brominated compound represented by the general formula RBrnIm [I]. Further, there is provided a crosslinkable composition comprising the above fluoroelastomer and a peroxide crosslinking agent.Type: GrantFiled: December 20, 2000Date of Patent: April 30, 2002Assignee: Nippon Mektron, Ltd.Inventors: Katsumi Abe, Haruyoshi Tatsu
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Publication number: 20020045782Abstract: Disclosed herein is a novel class of fluorovinyl ether monomers which are useful as cure site monomers in fluoroelastomers, a process for the preparation of these fluorovinyl ether monomers, and fluoroelastomer copolymer compositions that contain copolymerized units of these fluorovinyl ether monomers.Type: ApplicationFiled: October 9, 2001Publication date: April 18, 2002Inventors: Ming-Hong Hung, Walter W. Schmiegel
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Patent number: 6369178Abstract: A composition containing a non-flammable chlorofluoro-olefin copolymer having a crystallinity index less than about 10% and a weight-average molecular weight greater than about 1,000,000 daltons, wherein the copolymer has at least two comonomer units of the formula: CX2CYA wherein each X is independently selected from H, Cl and F; Y is selected from H, Cl, F, O(CZ2)nCZ3, (CZ2)nCZ3, (OCZ2CZ2)nCZ3 and (O(CZ2)n)nCZ3, wherein each n is independently from about 1 to about 12 and each Z is independently selected from H, Cl and F; and A is selected from H, Cl and F, provided that for at least one comonomer unit, at least one of A, Y, either X or any Z is Cl. Substrates coated with the copolymer compositions are also disclosed.Type: GrantFiled: December 23, 1998Date of Patent: April 9, 2002Assignee: AlliedSignal Inc.Inventor: Thomas F. McCarthy
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Publication number: 20020040119Abstract: A novel emulsion polymerization process for the production of fluoroelastomers is disclosed wherein a hydrocarbon sulfonate anionic surfactant of the formula CH3—(CH2)n—SO3M, CH3—(CH2)n—C6H4—SO3M, or CH3—(CH2)n—CH═CHCH2—SO3M, where n is an integer from 6 to 17, or mixtures thereof, and M is a cation having a valence of 1, is used as the dispersing agent.Type: ApplicationFiled: July 18, 2001Publication date: April 4, 2002Inventor: Phan L. Tang
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Patent number: 6365693Abstract: Fluorinated olefins and fluorinated vinyl ethers, each having sulfonyl azide groups, are useful monomers in preparing fluoropolymers having functional side groups. Such functional side groups are useful in curing the fluoropolymers and also for enhancing the adhesion of the fluoropolymers to other substrates.Type: GrantFiled: April 19, 2000Date of Patent: April 2, 2002Assignee: DuPont Dow Elastomers, L.L.C.Inventor: Ming-Hong Hung
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Patent number: 6365684Abstract: The present invention provides a novel, optionally surfactant-free process for controlling particle number, particle size, and/or particle size distribution. The method of the invention also significantly improves monomer to polymer conversion rates, as well as, increases the level of polymer solids which can be emulsified/dispersed in water without polymer flocculation. Specifically, the improved process provides an aqueous dispersion of up to about 48% polymer solids in water in the absence of surfactant. The resulting fluoropolymers dispersions may be used in resin and coating applications.Type: GrantFiled: September 12, 2000Date of Patent: April 2, 2002Assignee: AlliedSignal Inc.Inventors: Thomas F. McCarthy, Yan Chen, Eric J. Rainal
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Patent number: 6365243Abstract: The fine powder of high molecular weight fluorine containing resins having melt viscosities of 106 to 1013 poise, apparent density of 0.4 to 1.5 g/cc, and specific surface area of 2 m2/g or less, mold goods of the fine powder and these production methods. By utilizing the fine powder of high molecular weight flourine containing fused resins that have previously not been employed, the mold goods obtained from the fine powder have fewer liquated particles and have become the most suitable especially for manufacturing semiconductors. The powder's products have greater resistance to flex fatigue, abrasion, resistance, etc.Type: GrantFiled: January 22, 1997Date of Patent: April 2, 2002Assignee: Daikin Industries Ltd.Inventors: Katsuhide Otani, Kiyohiko Ihara
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Publication number: 20020037959Abstract: A thermoprocessable copolymer of TFE essentially formed by:Type: ApplicationFiled: September 26, 2001Publication date: March 28, 2002Applicant: Ausimont S.p.A.Inventors: Pasqua Colaianna, Giulio Brinati, Giambattista Besana
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Publication number: 20020037985Abstract: 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: ApplicationFiled: August 24, 2001Publication date: March 28, 2002Inventors: Donald F. Lyons, Albert L. Moore, Phan L. Tang, Antonio Vidal, J. F. Wehner
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Publication number: 20020035212Abstract: The present invention is directed to a method for forming graft copolymers from perfluoroolefins and perfluorovinyl ethers having fluorosulfonyl and fluorosulfonate functionality with selected polymers, and the uncrosslinked graft copolymers resulting therefrom.Type: ApplicationFiled: January 16, 2001Publication date: March 21, 2002Inventor: Jose Rodriguez-Parada
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Publication number: 20020035220Abstract: Copolymers having copolymerized units of vinylidene fluoride, perfluoro(alkyl vinyl) ether, 2-hydropentafluoropropene, and, optionally, tetrafluoroethylene, exhibit excellent low temperature properties and processability when cured with polyhydroxy compounds or amines.Type: ApplicationFiled: September 20, 2001Publication date: March 21, 2002Inventors: Stephen Bowers, Walter W. Schmiegel
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Patent number: 6359089Abstract: Disclosed herein is a novel class of fluorovinyl ether monomers which are useful as cure site monomers in fluoroelastomers, a process for the preparation of these fluorovinyl ether monomers, and fluoroelastomer copolymer compositions that contain copolymerized units of these fluorovinyl ether monomers.Type: GrantFiled: March 22, 2001Date of Patent: March 19, 2002Assignee: DuPont Dow Elastomers, L.L.C.Inventors: Ming-Hong Hung, Walter Werner Schmiegel
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Patent number: 6359044Abstract: Fluoropolymer aqueous dispersions comprising an hydrogenated nonionic surfactant and a fluorinated nonionic surfactant selected from the following classes: Rf—L—(OCH(R1)—CH(R2))n—O—A (I) wherein: n is an integer comprised between 4 and 60; L is selected from: —(CF(Y)—CO—O)pR′—; —(CF(Y)—CO—NH)pR′—; —(CF(Y)—SO2—NH)pR′—; wherein: p is 0 or 1; Y can be F or CF3; R′ is an alkylic radical C1-C5; R1, R2 can preferably be both H or the former H and the latter CH3, Rf can be a radical of (per)fluoroalkane type from 4 to 20 C atoms or of (per)fluoropolyether type; A is selected from the following ones: —H; —CH, —CH2OH; —CH2OCH2CH2OH; —CH2(OCH2CH2)n′″OR′ wherein n′″ is an integer between 2 and 15 and R′ is H, CH3, COCH3; —CONHCH2CH2OH.Type: GrantFiled: June 18, 2001Date of Patent: March 19, 2002Assignee: Ausimont S.p.A.Inventors: Valerio Biancardi, Enrico Marchese, Fabio Polastri
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Publication number: 20020032292Abstract: A fluoroelastomer obtained by polymerizing (a) tetrafluoroethylene, (b) a perfluoro (alkyl vinyl) ether and (c) a cyano group containing perfluorovinyl ether, in the presence of a brominated compound represented by the general formula:Type: ApplicationFiled: July 3, 2001Publication date: March 14, 2002Inventors: Sunao Ikeda, Satoru Saito
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Publication number: 20020032291Abstract: This invention concerns a process for the use of hydrogen halides as chain transfer agents in fluoroolefin polymerization.Type: ApplicationFiled: December 11, 2000Publication date: March 14, 2002Inventors: William Brown Farnham, Robert Clayton Wheland
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Publication number: 20020028886Abstract: Disclosed is a fluorocopolymer obtained by copolymerizing specific amounts of vinylidene fluoride, a perfluoro(lower alkyl vinyl ether), a specific fluorine compound represented by the following formula (I), a bromine-containing and/or iodine-containing vinyl monomer, and optionally, tetrafluoroethylene 1Type: ApplicationFiled: May 17, 2001Publication date: March 7, 2002Applicant: NIPPON MEKTRON, LTD.Inventors: Katsumi Abe, Haruyoshi Tatsu
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Publication number: 20020028895Abstract: Aqueous copolymerization of TFE and PAVE in the presence of a small amount of terpene enables the manufacture of a more uniform melt-fabricable copolymer with a narrower molecular weight distribution. The copolymer exhibits improved flex life.Type: ApplicationFiled: June 14, 2001Publication date: March 7, 2002Inventors: Takahiko Iwasaki, Masahiro Kino
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Publication number: 20020026021Abstract: Ionic perfluorovinyl compounds and their uses as components of ionic conductors of the polymer type, of selective membranes or of catalysts. The compounds comprise at least one perfluorovinyl group and at least one group chosen from —O or one of the groups C≡N, —C(C≡N)2, —NSO2R or —C[SO2R]2 or a pentacyclic group comprising at least one N, C—C≡N, CR, CCOR or CSO2R group. The compounds and/or their polymers are of use in the preparation of ionically conducting materials, electrolytes and selective membranes.Type: ApplicationFiled: July 5, 2001Publication date: February 28, 2002Inventors: Michel Armand, Christophe Michot
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Patent number: 6348552Abstract: Fluoroelastomers having copolymerized units of vinylidene fluoride major monomer, at least one other fluorinated major monomer, and at least one cure site monomer are prepared in an aqueous suspension polymerization process using an initiator consisting essentially of a solution of an oil soluble peroxide in a water-soluble hydrocarbon solvent.Type: GrantFiled: March 16, 2001Date of Patent: February 19, 2002Assignee: DuPont Dow Elastomers L.L.C.Inventors: Frantz Duvalsaint, Albert Lloyd Moore
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Publication number: 20020016428Abstract: A method for producing a tetrafluoroethylene/perfluoro (alkyl vinyl ether) type copolymer (PFA), which comprises carrying out the polymerization in a polymerization medium (such as CHFClCF2CF2Cl) in the presence of a chain transfer agent of a C1 or 2 hydrofluorocarbon (such as CH3CF2H) by means of a polymerization initiator (such as (FCF2CF2CF2COO)2). PFA obtained by this method has a small amount of unstable terminal groups contained in its molecule and is excellent in thermal stability and cracking resistance against a liquid reagent. Further, the amount of elution of fluorine ions is little even when it is applied to a component of e.g. an equipment for the production of semiconductors.Type: ApplicationFiled: July 24, 2001Publication date: February 7, 2002Applicant: Asahi Glass Company, LimitedInventors: Atsushi Funaki, Naoko Sumi
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Publication number: 20020016427Abstract: Tetrafluoroethylene (TFE) thermoprocessable copolymer microspheres having a substantially spherical shape for at least 95% by weight, the average size of the microspheres being in the range 25 &mgr;m and 2 mm, the bulk density being in the range 0.5 and 1.1 g/cm3.Type: ApplicationFiled: June 25, 2001Publication date: February 7, 2002Applicant: Ausimont S.p.A.Inventors: Hua Wu, Francesco Morandi
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Publication number: 20020013439Abstract: A polymerization process in microemulsion of:Type: ApplicationFiled: June 22, 2001Publication date: January 31, 2002Applicant: Ausimont S.p.A.Inventors: Marco Apostolo, Vincenzo Arcella
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Publication number: 20020010277Abstract: A low-molecular-weight copolymer of tetrafluoroethylene with units of perfluoro alkyl vinyl ethers having a melt index of ≧30 suitable as a mixing component with a higher-molecular-weight copolymer of the same monomers for producing moldings in injection molding or by extrusion.Type: ApplicationFiled: July 17, 2001Publication date: January 24, 2002Applicant: Dyneon GmbHInventors: Ralph Kaulbach, Friedrich Kloos, Gernot Lohr, Peter Stamprech, Lieselotte Stamprech