From Fluorine-containing Reactant Patents (Class 528/401)
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Patent number: 5521014Abstract: Crosslinkable, polyaromatic, polyether or polyester oligomers can have glass transition temperatures above 900.degree. F. while exhibiting desirable toughness for aerospace applications and ease of processing. A plurality (i.e. three or more) of generally linear aryl arms extend outwardly like spokes from a central aromatic hub through ether or ester linkages. Each spoke usually includes electronegative linkages, and is capped with one or two crosslinking functionalities (i.e. unsaturated hydrocarbon sites) which may be thermally or chemically activated to complete the advanced composite during curing. Among other methods, linear and multidimensional polyether oligomers are synthesized using nitrophthalic anhydride or halophthalic anhydride, dialcohols, or polyols, diamines, and suitable end caps.Type: GrantFiled: June 5, 1995Date of Patent: May 28, 1996Assignee: The Boeing CompanyInventors: Hyman R. Lubowitz, Clyde H. Sheppard
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Patent number: 5514764Abstract: Hyperbranched polyester and polyamide polymers are prepared by a one-step process of polymerizing a monomer of the formula A-R-B.sub.2 so that high molecular weight globular polymers having a multiplicity of a particular functional group on the outside surface are obtained.Type: GrantFiled: June 1, 1995Date of Patent: May 7, 1996Assignee: Cornell Research Foundation, Inc.Inventors: Jean M. J. Frechet, Craig J. Hawker, Kathryn Uhrich
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Patent number: 5514322Abstract: An RIM method of thermoplastic resin comprises a process for preparing materials in which one compound (i) is mixed with a material for thermoplastic resin to prepare one mixture (I), and the other compound (ii) is mixed with a material for thermoplastic resin to prepare the other mixture (II), each of two compounds (i) and (ii) being inactive to the material for thermoplastic resin but producing a high-active anionic polymerization catalyst by their reaction, a process for polymerization in which the mixture (I) and the mixture (II) are mixed, injected into a mold, and polymerized by the anionic polymerization catalyst, an ejecting process in which a solidified thermoplastic resin molded body is ejected from the mold. Therefore, a polymerization reaction cannot be started before the material for thermoplastic resin is injected into the mold, and it begins soon after the material for thermoplastic resin is injected into the mold.Type: GrantFiled: November 19, 1993Date of Patent: May 7, 1996Assignee: Toyota Jidosha Kabushiki KaishaInventor: Yoshiyuki Noritake
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Patent number: 5508380Abstract: Fluorinated polymers having thermoplastic elastomeric properties comprising in the macromolecule perfluoropolyoxyalkylene sequences of formula:--CF.sub.2 O--(CF.sub.2 CF.sub.2 O).sub.m --(CF.sub.2 O).sub.n --CF.sub.2 --(I)where m/n=0.2+5, are obtained through polycondensation with suitable perfluoropolyoxyalkylene condensation monomers corresponding to formula (I), functionalized with suitable reactive groups and having a functionality at least equal to 1.97, preferably at least equal to 1.99.Such polymers are characterized by an average molecular weight at least 50%, preferably at least 100%, higher than that of the corresponding polymers obtained starting from perfluoropolyoxyalkylenes corresponding to formula (I) having a functionality not higher than 1.96.Type: GrantFiled: August 21, 1995Date of Patent: April 16, 1996Assignee: Ausimont, S.p.A.Inventors: Stefano Turri, Giuseppe Gianotti, Marinella Levi, Claudio Tonelli
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Patent number: 5506309Abstract: This invention pertains to perfluoropolyethers and perhalogenated chlorofluoropolyethers that can be prepared by fluorinating addition polymers made by polymerizing epoxides.Type: GrantFiled: June 6, 1995Date of Patent: April 9, 1996Assignee: Exfluor Research CorporationInventors: Thomas R. Bierschenk, Timothy Juhulke, Hajimu Kawa, Richard J. Lagow
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Patent number: 5493005Abstract: Alcohol-soluble, aromatic heterocyclic copolymers having repeating units of the formula: ##STR1## wherein x has a value of 0.10 to 0.90 and y has a value of 1.0-x. These copolymers are useful in the preparation of organic/inorganic hybrid materials having transparency which comprise the sol-gel derived, hydrolytically condensed reaction product of a metal alkoxide of the formula M(OR).sub.w wherein R is a lower alkyl group, M is Si, Ti, Al or a mixture thereof, and w is the valence value of M, and the above copolymer.Type: GrantFiled: February 21, 1995Date of Patent: February 20, 1996Assignee: The United States of America as represented by the Secretary of the Air ForceInventors: Fred E. Arnold, Jom P. Chen
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Patent number: 5476721Abstract: Coatings obtainable from crosslinkable polyesters resins based on perfluoropolyethers obtainable from hydroxy-terminated PFPE, with acid anhydride and/or a diacid, a polyol with functionality higher than 2 and optionally in mixtures of diols having a functionality of 2, the resins being also even 70% weight/weight soluble in xylene.Type: GrantFiled: April 28, 1994Date of Patent: December 19, 1995Assignee: Ausimont, S.p.A.Inventors: Giovanni Simeone, Fabrizio Mutta, Angelo Locaspi, Claudio Tonelli
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Patent number: 5476974Abstract: Normally liquid, omega-hydrofluoroalkyl ether compounds (and selected mixtures thereof) have a saturated perfluoroaliphatic chain of carbon atoms interrupted by one or more ether oxygen atoms. The compounds can be prepared, e.g., by decarboxylation of the corresponding fluoroalkyl ether carboxylic acids and are useful, e.g., in cleaning and drying applications.Type: GrantFiled: May 20, 1994Date of Patent: December 19, 1995Assignee: Minnesota Mining and Manufacturing CompanyInventors: George G. I. Moore, Miguel A. Guerra
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Patent number: 5466764Abstract: There are here disclosed an adhesive composition obtained by adding a fluorine-containing carboxylic acid epoxy adduct to a 2-cyanoacrylate, and a process for preparing the adhesive composition. This 2-cyanoacrylate-based adhesive composition is excellent in storage stability and particularly excellent in adhesive force and impact resistance and has a high hardening rate. In particular, the adhesive strength of the 2-cyanoacrylate-based adhesive composition can be remarkably increased without lowering the hardening rate, and so the 2-cyanoacrylate-based adhesive composition can exert a sufficient resistance to impact and the like at the time of the adhesion of metals, rubbers, plastics and lumbers and the reliability of adherends can be improved.Type: GrantFiled: September 16, 1994Date of Patent: November 14, 1995Assignee: Three Bond Co., Ltd.Inventor: Soichiro Hiraoka
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Patent number: 5463018Abstract: Polycarbynes, such as doped polycarbynes, prepared from a soluble source of electrons and an organic monomer or co-monomer containing at least one carbyne group and, optionally, containing a doping agent, in an ethereal, polyethereal, or hydrocarbon solvent are presented. A wide variety of arylcarbyne and/or alkylcarbyne monomers and co-monomers can be combined with a source of electrons soluble in an ethereal, polyethereal, or hydrocarbon solvent to form novel polycarbyne polymers. These polycarbyne polymers can be used to form synthetic diamond materials, fibers, and other materials that can withstand extreme conditions.Type: GrantFiled: January 25, 1994Date of Patent: October 31, 1995Assignee: Board of Regents of the University of NebraskaInventor: Reuben D. Rieke
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Patent number: 5453468Abstract: The invention relates to two classes of prepolymers containing a perfluoropolyethereal chain and carboxylic end groups, suitable as cross-linking agents for epoxy prepolymers. The first class contains anhydride-derived end groups; the second lactone-derived end groups; prepolymers therefrom are also disclosed. Additional non-fluorinated curing agents may also be added.Type: GrantFiled: January 24, 1995Date of Patent: September 26, 1995Assignee: Ausimont S.p.A.Inventors: Leno Mascia, Claudio Tonelli, Giovanni Simeone
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Patent number: 5405677Abstract: A highly fluorinated benzene compound is reacted with acryloyl chloride to ield a fluorinated liquid product which is used to impregnate a reinforcing structure. Upon impregnation, the liquid material is polymerized at about 55.degree. C. to produce a reinforced polymeric structure, which can be a circuit board. The polymer has dielectric constant of about 2.1, which is very low compared to the polymers used presently.Type: GrantFiled: September 30, 1993Date of Patent: April 11, 1995Assignee: The United States of America as represented by the Secretary of the NavyInventors: James R. Griffith, Henry S. W. Hu
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Patent number: 5386005Abstract: The invention relates to two classes of prepolymers containing a perfluoropolyethereal chain and carboxylic end groups, suitable as cross-linking agents for epoxy prepolymers.The first class contains anhydride-derived end groups; the second lactone-derived end groups; prepolymers therefrom are also disclosed. Additional non-fluorinated curing agents may also be added.Type: GrantFiled: February 19, 1993Date of Patent: January 31, 1995Assignee: Ausimont S.p.A.Inventors: Leno Mascia, Claudio Tonelli, Giovanni Simeone
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Patent number: 5378537Abstract: The polyester monofilament of this invention has a terminal carboxyl group concentration of not more than 10 equivalent weights/10.sup.6 g and contains an unaltered carbodiimide compound in an amount in the range of from 0.005 to 1.5% by weight and a fluorine type polymer in an amount in the range of from 0.01 to 30% by weight. The polyester monofilament of this invention has an excellent resistance to hydrolysis and proof against staining. When used under high temperature and high humidity conditions susceptible to hydrolysis and the collection of stains, as when used in a papermaking drier canvas, it brings about a notable effect of prolonging the service life of the canvas and lengthening the cycle of cleaning.Type: GrantFiled: June 17, 1992Date of Patent: January 3, 1995Assignee: Toray Industries, Inc.Inventors: Toyohiko Masuda, Takehiko Miyoshi, Yoshinori Horii
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Patent number: 5362847Abstract: A graft copolymer is produced by grafting both at least one perfluoroacrylate and at least one N-(oxymethyl)acrylamide, e.g., IBMA, onto a poly(oxyalkylene) composition. This graft copolymer is water dispersible prior to crosslinking while after crosslinking, it becomes a highly durable hydrophobic and oil repellent coating for fibers, textiles, and the like.Type: GrantFiled: November 27, 1991Date of Patent: November 8, 1994Assignee: Karlshamns ABInventors: Robert Miller, James L. Williams, George H. Greene
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Patent number: 5354811Abstract: A fluorine-containing thermoplastic elastomer composition comprising a continuous phase of at least one melt-formable thermoplastic fluorocarbon resin and a disperse phase of vulcanizate of a fluorine-containing elastomer having vulcanizable sites selected from the group consisting of epoxy groups, carboxylic acid groups, carboxylic acid derivative groups, sulfonic acid groups and sulfonic acid derivative groups, wherein the disperse phase is from 50 to 90% by weight based on the total amount of the continuous phase and the disperse phase.Type: GrantFiled: November 18, 1992Date of Patent: October 11, 1994Assignee: Asahi Glass Company Ltd.Inventors: Hiroki Kamiya, Masayuki Saito
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Patent number: 5310870Abstract: The invention relates to fluorotelomers, their synthesis by free radical-initiated telomerization of fluoroalkenes (e.g. TFE) in which hydrofluorocarbons (HFC's) are used both as telogens and as solvents, and dispersions of the fluorotelomers in HFC's. The fluorotelomers are normally solid, essentially non-distillable and highly crystalline, and their dispersions exhibit excellent lubricant properties and stability under normal usage and have a negligible impact on the environment compared to conventional telomer dispersions.Type: GrantFiled: August 13, 1992Date of Patent: May 10, 1994Assignee: E. I. Du Pont de Nemours and CompanyInventor: Richard E. Peavy
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Patent number: 5308685Abstract: A method of protecting machine-readable markings on the surfaces of articles consisting in applying to the machine-readable markings a thin layer of an amorphous fluoropolymer, which may be, i.a., a copolymer of perfluoro(1,3-dioxole) or of perfluoro(2,2-dimethyl-1,3-dioxole) with a fluoromonomer selected from a specifically recited group, especially, with tetrafluroethylene; or a cyclic aliphatic homopolymer in which the repeating unit contains an aliphatic ring of 5-9 members, at least two of the ring members being carbon atoms independently substituted either by fluorine atoms or by perfluoromethyl groups, at most two of the ring atoms being oxygen atoms, the remaining portions of the repeating units, when present, being pefluoromethylene groups.Type: GrantFiled: September 30, 1993Date of Patent: May 3, 1994Assignee: E. I. du Pont de Nemours and CompanyInventor: James R. Froggatt
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Patent number: 5281695Abstract: The present compound is a novel perfluoropolyether represented by the following general formula: ##STR1## wherein m is an integer of 1 to 3 and n is an integer of 2 to 6. This compound is quite useful as an inert liquid used as a heat transfer mediums in the filed of electronic materials.Type: GrantFiled: May 14, 1992Date of Patent: January 25, 1994Assignee: Shin-Etsu Chemical Co., Ltd.Inventors: Hirofumi Kishita, Yasuo Tarumi, Kouichi Yamaguchi, Takashi Matsuda, Kouji Takano
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Patent number: 5243025Abstract: A reaction of perfluoroolefins with bis(silyl) ethers to produce novel partially fluorinated and perfluorinated copolymers and macrocyclic compounds is disclosed.Type: GrantFiled: January 23, 1991Date of Patent: September 7, 1993Assignee: E. I. Du Pont de Nemours and CompanyInventors: William B. Farnham, Mario J. Nappa
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Patent number: 5128435Abstract: A resin composition comprising an epoxy resin and an isocyanate group-containing fluorine compound is particularly suitable for covering a magnetic recording medium comprising a non-magnetic substrate and formed thereon a thin magnetic film so as to give excellent sliding durability.Type: GrantFiled: July 16, 1990Date of Patent: July 7, 1992Assignee: Hitachi, Ltd.Inventors: Mitsuyoshi Shoji, Takayuki Nakakawaji, Yutaka Ito, Shigeki Komatsuzaki, Toshikazu Narahara
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Patent number: 5116934Abstract: Polyimidazoles (Pl) are prepared by the aromatic nucleophilic displacement reaction of di(hydroxyphenyl)imidazole monomers with activated aromatic dihalides or activated aromatic dinitro compounds. The reactions are carried out in polar aprotic solvents such as N,N-dimethylacetamide, sulfolane, N-methylpyrrolidinone, dimethylsulfoxide, or diphenylsulfone using alkali metal bases such as potassium carbonate at elevated temperatures under nitrogen. The di(hydroxyphenyl)imidazole monomers are prepared by reacting an aromatic aldehyde with a dimethoxybenzil or by reacting an aromatic dialdehyde with a methoxybenzil in the presence of ammonium acetate. The di(methoxyphenyl)imidazole is subsequently treated with aqueous hydrobromic acid to give the di(hydroxyphenyl)imidazole monomer.Type: GrantFiled: July 19, 1991Date of Patent: May 26, 1992Assignee: The United States of America as represented by the Administrator of the National Aeronautics and Space AdministrationInventors: John W. Connell, Paul M. Hergenrother
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Patent number: 5109103Abstract: New polyesters comprising polyoxyfluoroalkylene blocks are prepared by polycondensation of diols with dicarboxylic acids or with derivatives thereof, said fluorinated polyesters being characterized by such improved surface properties that any subsequent treatments of the surface of the articles obtained therefrom are needless.Type: GrantFiled: January 22, 1991Date of Patent: April 28, 1992Assignee: Ausimont S.p.A.Inventors: Alberto Re, Marco De Giorgi, Gerardo Caporiccio
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Patent number: 5102971Abstract: Process for the preparation of polyaromatic compounds in which an aromatic dichloro compound, optionally in the presence of an anhydrous aprotic solvent, is reacted with metallic zinc, manganese or magnesium in the presence of a catalyst system of(1) from 0.1 to 25 mol-% (based on the dihalogen compound) of a nickel salt, nickel complex salt or nickel complex,(2) from 2 to 100 mol per mol of nickel in (1) of a triarylphosphine and optionally(3) from 0.1 to 10 mol per mol of nickel (1) of a halide, sulphate or phosphate of an alkali metal, alkaline earth metal, zinc, magnesium or manganese.Type: GrantFiled: September 14, 1990Date of Patent: April 7, 1992Assignee: Bayer AktiengesellschaftInventors: Thomas Himmler, Rudolf Braden, Joachim Genz, Karsten-Josef Idel, Ralf Pakull
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Patent number: 5091501Abstract: This invention provides a process for producing 2H-1-benzopyran-2-ones (coumarins) from optionally-substituted o-halocinnamic acids or esters under polyester-forming conditions. When the coumarins contain appropriately reactive functional groups, and desired monomers are present, a colored or UV-absorbing coumarin/polyester copolymer is provided in one step.Type: GrantFiled: October 4, 1990Date of Patent: February 25, 1992Assignee: Eastman Kodak CompanyInventors: Max A. Weaver, Samuel D. Hilbert, Wayne P. Pruett, Clarence A. Coates, Jr.
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Patent number: 5087687Abstract: Polyethers are disclosed which contain perfluoroalkyl groups and have the average formula ##STR1## wherein R.sup.1 is the same or different in the polymer mixture and represents hydrogen or a fluoro group,n has an average value of 4 to 12,a has an average value of 0 to 4,m has an average value of 2 to 18,x has an average value of 2 to 50 andy has an average value of 0 to 3.A method for the synthesis of the new polyols, which are usefull as surfactants and, with respect to the compounds of formula I, as polyol components in the synthesis of polyurethanes, is also disclosed.Type: GrantFiled: January 26, 1990Date of Patent: February 11, 1992Assignee: Th. Goldschmidt AGInventors: Jurgen Fock, Eberhard Esselborn
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Patent number: 5061577Abstract: A class of fluorinated polyols which when added to formulated dispersions used to make a magnetic particle based coating not only improves the dispersion of the particles in the formulation during manufacture but also improves the wear characteristics of the cured coating during use. The fluorinated polyol may be prepared either by the reaction of a diglycidyl ether with a diol or by the reaction of two diols with epichlorohydrin.Type: GrantFiled: November 28, 1988Date of Patent: October 29, 1991Assignee: Allied-Signal Inc.Inventors: Daniel F. Harnish, Donald Pickens, Richard J. Brautigam
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Patent number: 5061784Abstract: Polyimides and polyamide-acids having improved solubility and processing characteristics and high glass transition temperatures are provided, having incorporated into the polymeric chain the novel aromatic dianhydride compound 4,4'-bis[2-(3,4-dicarboxyphenyl) hexafluoroisopropyl] diphenyl dianhydride. The polyamide-acids and polyimides are prepared by reacting the 12F-Diphenyl DA with aromatic or aliphatic diamines. It has been found that the polyimides of this invention have improved solubility characteristics, good dielectric properties while at the same time exhibiting relatively high glass transition temperatures, and superior thermal and thermo-oxidative stability. The polymers may be processed into films, fibers or compression molded or fabricated into composites at moderate temperatures and pressures.Type: GrantFiled: August 6, 1990Date of Patent: October 29, 1991Assignee: Hoechst Celanese CorporationInventors: Werner H. Mueller, Rohitkumar H. Vora
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Patent number: 5032660Abstract: Curable compositions comprise a silanol-terminated polyorganosiloxane, a cross-linking agent which is an organic silane free of isocyanate groups and a metal organic compound containing a Ti-O-P bond. The compositions cure on exposure to the atmosphere and, in comparison to known compositions containing organotitanium compounds show a reduced tendency to be discoloured.Type: GrantFiled: October 17, 1989Date of Patent: July 16, 1991Assignee: Tioxide Group plcInventors: Peter D. Kay, David A. Brown
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Patent number: 4978389Abstract: Surface treating agents comprising of an organic titanium compound containing at least one fluoropolyether radical linked by carboxy groups to the titanium and at least one hydrolyzable group, such compounds being obtained by reacting a fluoropolyether having one or more carboxylic groups with a titanium compound having at least one group able to react with carboxylic group and at least one residual hydrolyzable group per titanium atom. The surface treating agents have not only superior surface activity and anti-corrosion properties for the metal surface but are also chemically stable.Type: GrantFiled: February 27, 1989Date of Patent: December 18, 1990Assignee: Nippon Soda Co. Ltd.Inventors: Masayuchi Sato, Atsushi Mori, Mamoru Aizawa
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Patent number: 4958005Abstract: A fluorine-containing composition represented by formula (I) ##STR1## wherein X represents a group containing a polyfluoroaliphatic group having from 3 to 26 carbon atoms; R represents a hydrogen atom or an aliphatic group having from 1 to 3 carbon atoms; n represents an integer of from 2 to 3; p represents an integer of from 1 to 100; and Y represents a group represented by formula (II) or formula (III) ##STR2## wherein R represents a hydrogen atom or an aliphatic group having from 1 to 3 carbon atoms; n represents an integer of from 2 to 3; and Z represents an iodine atom, a sulfonate group, or a sulfate group, ##STR3## wherein R represents a hydrogen atom or an aliphatic group having from 1 to 3 carbon atoms; n represents an integer of from 2 to 3; and Z.sup.1 represents an iodine atom, a bromine atom, a chlorine atom, or a hydroxyl group; and a process for preparing the same.Type: GrantFiled: September 20, 1988Date of Patent: September 18, 1990Assignee: Daikin Industries, Ltd.Inventors: Takeo Saegusa, Masatoshi Miyamoto, Yoshiyuki Sano
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Patent number: 4944824Abstract: Two-stage curing of composite tooling of carbon fiber reinforced polyimide of high Tg.Type: GrantFiled: September 23, 1988Date of Patent: July 31, 1990Assignee: E. I. Du Pont de Nemours and CompanyInventor: Dipak Gupta
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Patent number: 4938995Abstract: The subject invention relates to a process for the deposition of an oxygen-containing high fluoropolymer thin film onto an approxpriate substrate comprising loading the substrate in an enclosed reactor; evacuating the reactor; charging the reactor with an inert carrier gas and an oxygen-containing fluorocarbon monomer feed gas; and plasma-polymerizing the feed gas such that a thin film of polymerized monomer is deposited onto the substrate.The invention further relates to an insulation material comprising the fluoropolymer thin film recited above, a plasma polymerized thin film of an oxygen-containing fluoropolymer, and the use of a polymerization precursor monomer for such thin films that is an oxygen-containing fluorocarbon monomer.Type: GrantFiled: May 10, 1989Date of Patent: July 3, 1990Assignee: The Standard Oil CompanyInventors: Paul J. Giordano, George W. Prohaska, Richard C. Smierciak
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Patent number: 4906714Abstract: Partially fluorinated polyesters are disclosed having increased biodegradability and water repellancy. The incorporation of an ester group into the backbone of the partially fluorinated compound permits modification of the compound's physical properties.Type: GrantFiled: August 2, 1988Date of Patent: March 6, 1990Assignee: E. I. Du Pont De Nemours and CompanyInventor: Harry N. Cripps
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Patent number: 4866156Abstract: Novel processes are provided for synthesizing 2,2-bis(4-fluorophenyl)hexafluoropropane and the use of this synthesized monomer in polymerization reactions to form poly(arylethers) or poly(arylthioethers). Synthesis of 2,2-bis(4-fluorophenyl)hexafluoropropane involves converting the commonly available compound Bisphenol AF to an amino-substituted form, followed by treatment with borofluoric acid and a nitrite, and then an aromatic solvent to obtain the monomer. The monomer can be mixed with either a dihydroxy diphenyl hexafluoropropane or a dimercapto diphenyl hexafluorpropane to cause a nucleophilic substitution reaction, thereby yielding the desired poly(arylether) or poly(arylthioether).Type: GrantFiled: July 29, 1987Date of Patent: September 12, 1989Assignee: Hughes Aircraft CopmanyInventors: Kreisler S. Y. Lau, Thomas K. Dougherty
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Patent number: 4851485Abstract: Non-fluorinated epoxy resins of a known type are cross-linked by means of polyfunctional fluoroalkanes containing groups which are reactive with the epoxy groups and/or with the hydroxy groups present in the starting resin. The cross-linked products so obtained, having a fluorine content not higher than 15% by weight, and preferably ranging from 1% to 5%, exhibit a complex of properties which are typical of the corresponding fluorinated resins having a much higher fluorine content; in particular, oil- and water-repellency, resistance to hydrolysis and to solvents, and minimum absorption of water.Type: GrantFiled: June 1, 1988Date of Patent: July 25, 1989Assignee: Ausimont S.p.A.Inventors: Alberto Re, Claudio Tonelli, Vito Tortelli
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Patent number: 4833227Abstract: Fluorinated polymers having epoxy resin structure, containing at least 10% by weight, preferably 20% by weight, of fluorine, prepared starting from epichlorohydrin and from one or more diols, at least one of which is a perfluoroalkylene diol, and by using conventional cross-linking agents for epoxy resins, such as anhydrides of dicarboxylic acids, di- or tri-isocyanates, polyfunctional amines.Type: GrantFiled: December 10, 1987Date of Patent: May 23, 1989Assignee: Ausimont S.p.A.Inventors: ALberto Re, Mario Alfieri
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Patent number: 4816545Abstract: Non-fluorinated epoxy resins of known type are crosslinked by means of polyfunctional perfluoropolyethers containing groups which are reactive with the epoxy groups and/or with the hydroxy groups present in the starting resin. The so-obtained crosslinked products, with a fluorine content not higher than 20% by weight, preferably comprised within the range of from 5% to 15%, are endowed with a set of properties typical of the corresponding fluorinated resins with a much higher fluorine content, in particular, water- and oil-repellence, resistance to hydrolysis and to solvents, minimum water absorption.Type: GrantFiled: May 8, 1987Date of Patent: March 28, 1989Assignee: Ausimont S.p.A.Inventors: Alberto Re, Gianni Donati
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Patent number: 4740579Abstract: A method of producing dihydroxy-terminated poly(2,2,3,3,4,4-hexafluoropene-1,5-diol formal) of a desired number average molecular weight by controlling the relative amounts of 1,3-dioxa-5,5,6,6,7,7-hexafluorocyclooctane monomer, 2,2,3,3,4,4-hexafluoropentane-1,5-diol, and the catalyst trifluoromethane sulfonic acid (having a determined activity) used to produce the polymer.Type: GrantFiled: May 5, 1987Date of Patent: April 26, 1988Assignee: The United States of America as represented by the Secretary of the NavyInventors: Judah M. Goldwasser, Horst G. Adolph
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Patent number: 4699969Abstract: New resins containing urethane and/or epoxy bonds are prepared starting from fluorinated polymers having an epoxy structure and exhibiting structural characteristics predominantly typical of epoxides or of polyols, said polymers being prepared by synthesis from one or more diols, at least one of which being a perfluoropolyoxyalkylene diol, and from epichlorohydrin; said polymers are subsequently subjected to a treatment with isocyanated if their structural characteristics are predominantly those of polyols, or with polyamines or anhydrides if their structural characteristics are predominantly those of epoxides.Type: GrantFiled: July 22, 1986Date of Patent: October 13, 1987Assignee: Ausimont S.p.A.Inventors: Alberto Re, Tiziano Terenghi
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Patent number: 4687696Abstract: Improvements in a finger strip for copying machines are proposed. The finger strip made of a heat-resistant resin is coated with a fluorinated polyether polymer to improve lubricity and antistickiness. High adhesion strength between the coating and the substrate and very thin coating help to eliminate the problems of poor separation and jamming of paper.Type: GrantFiled: July 29, 1985Date of Patent: August 18, 1987Assignee: NTN-Rulon Industries Co., Ltd.Inventor: Fuminori Satoji
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Patent number: 4687821Abstract: Compounds represented by the general formulas ##STR1## are prepared by reacting halofluoropropylene oxides with fluorinated acid fluorides and ketones.These compounds may be decarboxylated to form useful monomers, ##STR2## wherein a=to 3;b=to 3;c=0 or 1;provided a+b+c.noteq.0;n=zero or an integer greater than zero;R.sub.f =F, perfluoroalkyl or fluorochloroalkyl;X=F, Cl, Br or mixtures thereof when n>1;X'=Cl or Br;Y=Cl, Br, F or I;Z=F, OH, NRR' or OA;R and R' are independently selected from the group consisting of hydrogen, an alkyl having one or more than one carbon atom and an aryl;A=alkali metal, quaternary ammonium, R or an aryl.These monomers may then be polymerized into polymers having useful properties.Type: GrantFiled: July 5, 1983Date of Patent: August 18, 1987Assignee: The Dow Chemical CompanyInventors: Bobby R. Ezzell, William P. Carl, William A. Mod
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Patent number: 4668357Abstract: A method of preparing perfluoropolyethers having a regulated molecular weight starting from the product obtained by photochemical oxidation of C.sub.2 F.sub.4 and having a various content of oxygen peroxide, consisting in heat-treating the peroxidized product in order to partially remove the oxygen peroxide till reducing it to a relatively low value, which is prefixed as a function of the molecular weight to be obtained for the final product, and in the subsequent treatment with gaseous fluorine at high temperatures.Type: GrantFiled: February 21, 1986Date of Patent: May 26, 1987Assignee: Montedison S.p.A.Inventors: Giuseppe Marchionni, Gian T. Viola
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Patent number: 4600441Abstract: An air-drying, oil and dirt repellent alkyd paint is made by reacting a drying component, such as a drying oil, hydroxyl containing mixture of fluorine-free polyol and fluorinated aliphatic alcohol having a perfluoroalkyl group of from 4 to 12 carbon atoms, and a polycarboxylic acid, and then adding a suitable solvent, and a pigment component.Type: GrantFiled: March 21, 1985Date of Patent: July 15, 1986Assignee: Westinghouse Electric Corp.Inventors: Newton N. Goldberg, John S. Hudock
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Patent number: 4591616Abstract: Copolymers of vinylidene fluoride (VDF) and hexafluoroacetone (HFA) exhibit lower indices of refraction than polymethyl methacrylate (PMMA) and can be blended well with PMMA at widely variable ratios. The obtained blends are thermoplastic resins which can easily be moulded or extruded into desirably shaped and transparent members having good mechanical properties and weather resistance. The blends are soluble in various organic solvents. It is preferable that the amount of HFA in the copolymer is not more than 90 mol %. The refractive index of a member formed of the blend falls in the range of about 1.37-1.49 and can freely be controlled by controlling the weight ratio of PMMA to VDF/HFA copolymer. The blend is useful for optical fibers, cylindrical lenses, etc.Type: GrantFiled: August 22, 1985Date of Patent: May 27, 1986Assignee: Central Glass Company, LimitedInventors: Seizo Miyata, Satoru Kobayashi
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Patent number: 4562246Abstract: High molecular weight, essentially linear, thermoplastic amino-s-triazine resins having an inherent viscosity of at least about 0.55 dl./g. are disclosed, comprising recurring units of the formula: ##STR1## containing not less than 25 wt. % of triamino-s-triazine units of the formula: ##STR2## Such resins are suitable for molding or extrusion into films, fibers and filaments and for preparation of composite materials.Also disclosed is a process for the production of high molecular weight essentially linear, thermoplastic amino-s-triazine resins which comprises reacting, in contact with water, an inert, water-immiscible organic solvent for at least one of the reactants and a basic acid acceptor, substantially equimolar proportions of a triazine compound or a mixture of triazine compounds of the formula: ##STR3## with a diamine or a mixture of diamines of the formula: ##STR4## until a thermoplastic amino-s-triazine resin having an inherent viscosity of at least about 0.55 dl/g., is produced.Type: GrantFiled: March 16, 1984Date of Patent: December 31, 1985Assignee: American Cyanamid CompanyInventors: David W. Wang, Michael M. Fisher, Walter M. Thomas
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Patent number: 4503206Abstract: Tetrafluoroethylene is reacted in an aqueous environment with hydroxyl radicals, generating a mixture of water soluble and water insoluble .alpha.,.omega.-perfluorodicarboxylic acids.Type: GrantFiled: December 22, 1982Date of Patent: March 5, 1985Assignee: Indiana University FoundationInventor: Ivan M. Robinson
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Patent number: 4451646Abstract: Amorphous, highly viscous high molecular weight copolyethers containing in excess of 200 total repeating units and formed of --CF.sub.2 --CF.sub.2 --O-- and --CF.sub.2 --O-- repeating units randomly distributed along the chain and linked to each other either directly or through an oxygen atom, in which latter case a peroxy group is present along the chain. These copolyethers, which are useful for preparing bifunctional telomers, high molecular weight fluoropolymers, and highly stable lubricants and heat exchange materials, are prepared by reacting molecular oxygen with tetrafluoroethylene dissolved in a fluorinated or chlorofluorinated solvent selected from the group consisting of dichlorodifluoromethane, perfluorocyclobutane, perfluorodimethylcyclobutane, 1,2-dichloro-hexafluoropropane and 1,2-dichloro-tetrafluoroethane in the presence of ultraviolet radiation and under such conditions that the molar ratio of the tetrafluoroethylene to the oxygen in the reactant feed is between about 0.Type: GrantFiled: May 29, 1979Date of Patent: May 29, 1984Assignee: Montedison, S.p.A.Inventors: Dario Sianesi, Adolfo Pasetti, Giorgio Belardinelli
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Patent number: 4434106Abstract: Perfluoroether triazine elastomers having improved properties and utility in seals, gaskets, sealing components and the like are prepared from oligomeric imidoylamidines that have, in turn, been prepared by the process of (a) reacting a perfluorodinitrile with liquid ammonia to yield a perfluorodiamidine, (b) isolating the perfluorodiamidine, (c) reacting the isolated diamidine with a perfluorodinitrile to yield a perfluoro(imidoylamidine) dinitrile, and then repeating steps (a), (b), and (c) to sequentially grow an oligomer of desired molecular size. The isolated amidine and nitrile intermediates are also disclosed.Type: GrantFiled: April 6, 1982Date of Patent: February 28, 1984Assignee: The United States of America as represented by the Administrator of the National Aeronautics and Space AdministrationInventors: Robert W. Rosser, Timothy S. Chen, Chung-Heng Cheng
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Patent number: 4410717Abstract: Tetraesters of pyromellitic dianhydride are disclosed wherein two ester moieties are saturated hydrocarbon groups and two ester moieties are halohydroxyalkyl groups. The compounds may be used as diluents for fluorinated pyromellitates that are useful as soil and water repelling agents. Mixtures formed by dissolving the compounds of this invention and known fluorinated pyromellitates in a common solvent are capable of imparting soil and water repelling properties to various fibers that are essentially equivalent to soil and water repelling properties imparted to such fibers by fluorinated pyromellitates alone. Additionally, the hydrocarbon pyromellitates of this invention may be used alone as water repellents.Type: GrantFiled: May 5, 1982Date of Patent: October 18, 1983Assignee: Allied CorporationInventors: Bryce C. Oxenrider, Alson K. Price