Aromatic Patents (Class 526/251)
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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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Publication number: 20020051938Abstract: This invention relates to resins and photoresist compositions that comprise such resins. Preferred polymers of the invention comprise adjacent saturated carbon atoms, either integral or pendant to the polymer backbone, that have a substantially gauche conformation. Polymers of the invention are particularly useful as a resin binder component of chemically-amplified positive-acting resists that can be effectively imaged at short wavelengths such as sub-200 nm and preferably about 157 nm. In such short-wavelength imaging applications, polymers of the invention that have a population of dihedral angles of adjacent saturated carbon atoms that are enriched in substantially gauche conformations can provide reduced undesired absorbance of the high energy exposure radiation.Type: ApplicationFiled: September 8, 2001Publication date: May 2, 2002Applicant: Shipley Company, L.L.C.Inventors: Peter Trefonas, Gary N. Taylor, Charles R. Szmanda
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Patent number: 6359019Abstract: Graft polymeric membranes in which one or more trifluorovinyl aromatic monomers are radiation graft polymerized to a preformed polymeric base film are provided, as well as ion-exchange membranes prepared therefrom. Preferred monomers include substituted &agr;, &bgr;, &bgr;-trifluorostyrenes and trifluorovinyl naphthalenes which are activated towards the grafting reaction or facilitate the introduction of more than one ion-exchange group per monomer unit in the grafted chains. The ion-exchange membranes are useful in dialysis applications, and particularly in electrochemical applications, for example as membrane electrolytes in electrochemical fuel cells and electrolyzers.Type: GrantFiled: November 12, 1997Date of Patent: March 19, 2002Assignee: Ballard Power Systems Inc.Inventors: Charles Stone, Alfred E. Steck
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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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Publication number: 20020007029Abstract: A polymerizable vinylester composition is described which comprises at least three monomers and oligomers, said composition comprising:Type: ApplicationFiled: February 22, 2001Publication date: January 17, 2002Inventor: Boris A. Zaitsey
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Patent number: 6337379Abstract: A fluorine-containing polymer composition comprising a fluorine-containing solvent of the formula R1—O—R2 wherein R1 is a C5-12 linear or branched polyfluoroalkyl group which may have an ether bond, and R2 is a C1-5 linear or branched alkyl group, and a fluorine-containing amorphous polymer having a fluorine-containing ring structure in its main chain, dissolved in the solvent.Type: GrantFiled: June 29, 2001Date of Patent: January 8, 2002Assignee: Asahi Glass Company Ltd.Inventors: Ikuo Matsukura, Naoko Shirota
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Publication number: 20010051700Abstract: A fluorine-containing polymer composition comprising a fluorine-containing solvent of the formula R1—O—R2 wherein R1 is a C5-12 linear or branched polyfluoroalkyl group which may have an ether bond, and R2 is a C1-5 linear or branched alkyl group, and a fluorine-containing amorphous polymer having a fluorine-containing ring structure in its main chain, dissolved in the solvent.Type: ApplicationFiled: June 29, 2001Publication date: December 13, 2001Applicant: ASAHI GLASS COMPANY LTD.Inventors: Ikuo Matsukura, Naoko Shirota
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Patent number: 6323297Abstract: New starting materials and methods are used to make materials with low dielectric constant through the processes of transport polymerization or chemical vapor deposition. The starting materials and precursors are designed to provide polymers with combined low dielectric constant, high thermal stability and high mechanical strength.Type: GrantFiled: October 24, 1997Date of Patent: November 27, 2001Assignee: Quester Technology, Inc.Inventors: Chung J. Lee, Hui Wang, Giovanni Antonio Foggiato
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Patent number: 6313245Abstract: Acrylates having a high degree of halogenation, as well as polymers that include one or more mer units derived from such acrylates provide materials having tailorable optical and physical properties. The polymers find utility particularly in optical devices including optical waveguides and interconnecting devices.Type: GrantFiled: August 23, 1999Date of Patent: November 6, 2001Assignee: 3M Innovative Properties CompanyInventors: George G. I. Moore, Fred B. McCormick, Mita Chattoraj, Elisa M. Cross, Junkang Jacob Liu, Ralph R. Roberts, Jay F. Schulz
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Patent number: 6288187Abstract: The invention relates to ionic compounds in which the negative charge is highly delocalized. The compounds comprise at least one perfluorovinyl group and at least one group chosen from —O or one of the groups —NC≡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: March 25, 1999Date of Patent: September 11, 2001Assignees: ACEP Inc., Centre National de la Recherche Scientifique, Université de MontréalInventor: Michel Armand
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Patent number: 6284379Abstract: A fluorine-containing polymer composition comprising a fluorine-containing solvent of the formula R1—O—R2 wherein R1 is a C5-12 linear or branched polyfluoroalkyl group which may have an ether bond, and R2 is a C1-5 linear or branched alkyl group, and a fluorine-containing amorphous polymer having a fluorine-containing ring structure in its main chain, dissolved in the solvent.Type: GrantFiled: September 15, 2000Date of Patent: September 4, 2001Assignee: Asahi Glass Company Ltd.Inventors: Ikuo Matsukura, Naoko Shirota
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Patent number: 6265499Abstract: A process for producing a shaped product, which comprises polymerizing a mixture comprising a radical scavenger, a polymerization initiator and a radical polymerizable monomer to obtain a partially polymerized mixture having the conversion of the monomer into the polymer of from 5 to 90 wt %, filling the partially polymerized mixture in a predetermined cavity and then applying polymerization energy to complete polymerization.Type: GrantFiled: November 27, 1998Date of Patent: July 24, 2001Assignee: Menicon Co., Ltd.Inventors: Haruko Nagino, Ichiro Ando
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Patent number: 6201085Abstract: A fluorine-containing polymer composition comprising a fluorine-containing solvent of the formula R1—O—R2 wherein R1 is a C5-12 linear or branched polyfluoroalkyl group which may have an ether bond, and R2 is a C1-5 linear or branched alkyl group, and a fluorine-containing amorphous polymer having a fluorine-containing ring structure in its main chain, dissolved in the solvent.Type: GrantFiled: December 11, 1998Date of Patent: March 13, 2001Assignee: Asahi Glass Company Ltd.Inventors: Ikuo Matsukura, Naoko Shirota
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Patent number: 6150010Abstract: Intermetal level dielectrics comprise fluorinated polydimethylenenaphthalene derived from the following monomers wherein each of R.sub.1, R.sub.2, R.sub.3, and R.sub.4 is selected from the group consisting of H, F, and fluorocarbon groups ##STR1## The dielectric and oxides may be between metal lines. Fluorination of the polydimethylenenaphthalene lowers dielectric constant and increases working temperature.Type: GrantFiled: March 4, 1997Date of Patent: November 21, 2000Assignee: Texas Instruments IncorporatedInventor: Mona Eissa
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Patent number: 6110640Abstract: A positive working photosensitive composition comprising a specific fluorine-containing copolymer. The positive working photosensitive composition has not only an ability to form a high contrast image but also an ability to inhibit halation, a satisfactory safe light tolerance and a wide development latitude, without lowering the sensitivity.Type: GrantFiled: November 13, 1997Date of Patent: August 29, 2000Assignee: Fuji Photo Film Co., Ltd.Inventors: Koichi Kawamura, Noriaki Watanabe
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Patent number: 6111045Abstract: This invention provides a diene rubber composed of 40 to 99.99% by weight of conjugated diene units, 0.05 to 20% by weight of amino-containing vinyl monomer units, 0.05 to 20% weight of hydroxyl-containing vinyl monomer units, and 0 to 50% by weight of other copolymerizable monomer units, and having a Mooney viscosity (ML.sub.1+4, 100.degree. C.) of 10 to 200. This diene rubber yields a vulcanized rubber showing improvements in heat build-up, tensile strength, abrasion resistance and processability.Type: GrantFiled: June 29, 1998Date of Patent: August 29, 2000Assignee: Nippon Zeon Co. Ltd.Inventors: Yukio Takagishi, Masao Nakamura
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Patent number: 5985942Abstract: A composite membrane is provided in which a porous substrate is impregnated with a polymeric composition comprising various combinations of .alpha.,.beta.,.beta.-trifluorostyrene, substituted .alpha.,.beta.,.beta.-trifluorostyrene and ethylene-based monomeric units. Where the polymeric composition includes ion-exchange moieties, the resultant composite membranes are useful in electrochemical applications, particularly as membrane electrolytes in electrochemical fuel cells.Type: GrantFiled: November 5, 1998Date of Patent: November 16, 1999Assignee: Ballard Power Systems Inc.Inventors: Alfred E. Steck, Charles Stone
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Patent number: 5969063Abstract: Disclosed is a method for preparing fluorinated emulsion polymers that reduces or eliminates the need for fluorinated surfactants comprising the steps of:a) providing a reaction mixture comprising water, surfactant, monomer mixture comprising at least one fluorinated monomer, at least one non-fluorinated monomer having high water solubility, and optionally at least one non-fluorinated monomer having low water solubility, macromolecular organic compound having a hydrophobic cavity; andb) polymerizing said monomer mixture.Type: GrantFiled: July 2, 1998Date of Patent: October 19, 1999Assignee: Rohm and Haas CompanyInventors: Hsing-Yeh Parker, Willie Lau, Erik S. Rosenlind
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Patent number: 5922833Abstract: A process for making a fluoropolymer is disclosed. The process comprises solubilizing a fluoromonomer in solvent comprising a carbon dioxide fluid, and then polymerizing the fluoromonomer to produce a the fluoropolymer. A preferred solvent for carrying out the process is supercritical carbon dioxide; preferred fluoromonomers for carrying out the process are fluoroacrylate monomers such as 1,1-dihydroperfluorooctyl acrylate. The polymerization step is preferably carried out in the presence of an initiator such as azobisisobutyronitrile.Type: GrantFiled: October 31, 1997Date of Patent: July 13, 1999Assignee: The University of North Carolina at Chapel HillInventor: Joseph M. DeSimone
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Patent number: 5834523Abstract: A composite membrane is provided in which a porous substrate is impregnated with a polymeric composition comprising various combinations of .alpha.,.beta.,.beta.-trifluorostyrene, substituted .alpha.,.beta.,.beta.-trifluorostyrene and ethylene-based monomeric units. Where the polymeric composition includes ion-exchange moieties, the resultant composite membranes are useful in electrochemical applications, particularly as membrane electrolytes in electrochemical fuel cells.Type: GrantFiled: January 5, 1996Date of Patent: November 10, 1998Assignee: Ballard Power Systems, Inc.Inventors: Alfred E. Steck, Charles Stone
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Patent number: 5739223Abstract: A process for making a fluoropolymer is disclosed. The process comprises solubilizing a fluoromonomer in solvent comprising a carbon dioxide fluid, and then polymerizing the fluoromonomer to produce a the fluoropolymer. A preferred solvent for carrying out the process is supercritical carbon dioxide; preferred fluoromonomers for carrying out the process are fluoroacrylate monomers such as 1,1-dihydroperfluorooctyl acrylate. The polymerization step is preferably carried out in the presence of an initiator such as azobisisobutyronitrile.Type: GrantFiled: September 18, 1995Date of Patent: April 14, 1998Assignee: The University of North Carolina at Chapel HillInventor: Joseph M. DeSimone
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Patent number: 5702642Abstract: The polymeric compound of this invention is represented by the following general formula (I): ##STR1## wherein A represents a hydrogen atom or ##STR2## B represents a hydrogen atom or ##STR3## each of X.sub.1 and X.sub.2 represents independently a hydrogen atom or a methyl group, each of m and n represents independently an integer of 0 to 14, each of p and q represents independently 0 or 1, and each of Y1 , Y.sub.2, Y.sub.3, and Y.sub.4 represents independently a hydrogen atom or a fluorine atom, with the proviso that both A and B are not hydrogen atoms, p is 0 when m is 0, and q is 0 when n is 0.Type: GrantFiled: February 11, 1997Date of Patent: December 30, 1997Assignees: Sharp Kabushiki Kaisha, Kanto Kagaku Kabushiki KaishaInventors: Nobuaki Yamada, Shuichi Kozaki, Hoyo Mizobe, Masahiko Yoshida, Kenji Suzuki
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Patent number: 5688879Abstract: A process for making a fluoropolymer is disclosed. The process comprises solubilizing a fluoromonomer in solvent comprising a carbon dioxide fluid, and then polymerizing the fluoromonomer to produce a the fluoropolymer. A preferred solvent for carrying out the process is supercritical carbon dioxide; preferred fluoromonomers for carrying out the process are fluoroacrylate monomers such as 1,1-dihydroperfluorooctyl acrylate. The polymerization step is preferably carried out in the presence of an initiator such as azobisisobutyronitrile.Type: GrantFiled: February 7, 1997Date of Patent: November 18, 1997Assignee: The University of North Carolina at Chapel HillInventor: Joseph M. DeSimone
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Patent number: 5645760Abstract: The polymeric compound of this invention is represented by the following general formula (I): ##STR1## wherein A represents a hydrogen atom or ##STR2## B represents a hydrogen atom or ##STR3## each of X.sub.1 and X.sub.2 represents independently a hydrogen atom or a methyl group, each of m and n represents independently an integer of 0 to 14, each of p and q represents independently 0 or 1, and each of Y1, Y.sub.2, Y.sub.3, and Y.sub.4, represents independently a hydrogen atom or a fluorine atom, with the proviso that both A and B are not hydrogen atoms, p is 0 when m is 0, and q is 0 when n is 0.Type: GrantFiled: June 6, 1995Date of Patent: July 8, 1997Assignees: Sharp Kabushiki Kaisha, Kanto Kagaku Kabushiki KaishaInventors: Nobuaki Yamada, Shuichi Kozaki, Hoyo Mizobe, Masahiko Yoshida, Kenji Suzuki
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Patent number: 5623022Abstract: A propylene block copolymer having a high impact resistance is prepared without the generation of finely divided particles or the adhesion to the reactor, which propylene block copolymer having a weight ratio of 5/95-70/30 (process (1)/process (2)) is obtained by carrying out the particular polymerization processes (1) and (2) in this sequence under the action of the catalyst comprising the following A and B.A: particular transition metal compound.B: an alumoxane, the reaction product of an alkylboronic acid with an organoAl, a Lewis acid or ionic compound.Process (1): process for copolymerizing propylene and a specified comonomer in a ratio of 0/100-80/20.Process (2): process for producing a propylene polymer having a specified comonomer in an amount of 10% by weight or less.Type: GrantFiled: July 13, 1995Date of Patent: April 22, 1997Assignee: Mitsubishi Chemical CorporationInventors: Toshihiko Sugano, Takao Tayano
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Patent number: 5585427Abstract: A copolymer with an acid value less than one contains alternating units of a vinyl monomer and a diester of a dicarboxylic acid wherein at least one of the esterifying groups contains a polyether group. The copolymer is particularly useful in preparing pigment dispersions for coating compositions. Such compositions exhibit properties including reduced pigment settling and improved metallic flake orientation, flow and leveling.Type: GrantFiled: November 7, 1994Date of Patent: December 17, 1996Assignee: PPG Industries, Inc.Inventors: Karl F. Schimmel, James A. Claar, Lori S. Rardon, Mary L. Kimbro
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Patent number: 5506317Abstract: The heterogeneous polymerization of water-insoluble polymer in CO.sub.2 is disclosed. The method comprises providing a heterogeneous reaction mixture comprising CO.sub.2, a monomer, and a surfactant, then polymerizing the monomer to form a water-insoluble polymer.Type: GrantFiled: January 25, 1995Date of Patent: April 9, 1996Assignee: The University of North Carolina at Chapel HillInventors: Joseph M. DeSimone, Elise E. Maury, James R. Combes, Yusuf Z. Menceloglu
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Patent number: 5502133Abstract: Styrene homo-or-co- polymers, the stereoregularity of which is mainly syndiotactic are disclosed, having repeating unit or two or more different repeating units defined by a general formula (I): ##STR1## wherein each R may be the same or different. And a method of preparation of syndiotactic copolymers wherein there are two different repeating units represented by formula (I); wherein the polymerization is carried out with a catalyst comprising (a) a titanium compound and (b) a contact product of an organoaluminum compound and a condensing agent such as water.Type: GrantFiled: April 15, 1993Date of Patent: March 26, 1996Assignee: Idemitsu Kosan Company LimitedInventors: Nobuhide Ishihara, Masahiko Kuramoto, Michitake Uoi
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Patent number: 5496901Abstract: A process for making a fluoropolymer is disclosed. The process comprises solubilizing a fluoromonomer in solvent comprising a carbon dioxide fluid, and then polymerizing the fluoromonomer to produce the fluoropolymer. A preferred solvent for carrying out the process is supercritical carbon dioxide; preferred fluoromonomers for carrying out the process are fluoroacrylate monomers such as 1,1-dihydroperfluorooctyl acrylate. The polymerization step is preferably carried out in the presence of an initiator such as azobisisobutyronitrile.Type: GrantFiled: September 27, 1994Date of Patent: March 5, 1996Assignee: University of North CarolinaInventor: Joseph M. DeSimone
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Patent number: 5461132Abstract: An organic magnetic member comprises repetition units represented by the following general formula [I]: ##STR1## having at least one of R.sub.1 and R.sub.2 which is a substituted or unsubstituted aromatic ring, or a substituted or unsubstituted heterocyclic ring, and being spontaneously magnetized.Type: GrantFiled: March 3, 1994Date of Patent: October 24, 1995Assignee: Canon Kabushiki KaishaInventors: Masayoshi Tabata, Kazuaki Yokota, Yoko Yoshinaga, Fumio Kishi, Norio Kaneko, Nobuo Kushibiki
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Patent number: 5374701Abstract: Diarylacetylenes and diarylenamines are synthesized from a Schiff's base and an N-arylmethylheterocycle; these compounds are useful as intermediates for a variety of polymers; in particular an efficient process is provided for producing diaryl acetylenes useful in the efficient production of acetylene group-containing polymers which can be cross-linked to produce high strength polymers free of structural defects such as conventionally arise as a result of liberation of volatiles during the cross-linking.Type: GrantFiled: May 4, 1993Date of Patent: December 20, 1994Inventors: Allan S. Hay, Martino Paventi
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Patent number: 5364917Abstract: A process for preparing a polymer having perfluorocyclobutane rings by the steps of (a) contacting monomers having aromatic polyester, aromatic polyamide, or polyimide groups or combination thereof, at least two dimerizable perfluorovinyl groups; and (b) exposing the monomers to sufficient heat and for a sufficient time that a polymer containing perfluorocyclobutane rings is formed. Chain extending oligomers of polymers having poor processing characteristics by this process results in polymers which are more easily processed. For instance, perfluorocyclobutane groups formed in an extruder to chain lengthen polyimide oligomers, in effect, render polyimides extrudable. The polymer formed by the method preferably has polyimide groups. New monomers and polymers having imide and perfluorovinyl or perfluorocyclobutane structures, respectively, are prepared.Type: GrantFiled: December 1, 1993Date of Patent: November 15, 1994Assignee: The Dow Chemical CompanyInventors: David A. Babb, W. Frank Richey, Katherine S. Clement, Bobby R. Ezzell
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Patent number: 5334681Abstract: Fluorine and/or silicone containing block copolymers are described which are the copolymerization product of mono; di- or trivinyl substituted poly(ethylene oxide) prepolymers (A) and fluoroalkyl-alkylene acrylates or methacrylates (B1), oligosiloxy-silyl alkyl-acrylates or methacrylates (B2), ether copolymerizable comonomers (C), and 0.1 to 10% of a di- or polyvinyl crosslinking comonomer (D) of 200 to 1000 molecular weight. The novel block copolymers are prepared in solution or bulk and form hydrogels, which are characterized by high oxygen permeability, resiliency, flexibility and wettability and are therefore well suited as biocompatible polymers, especially as contact lenses.Type: GrantFiled: December 17, 1993Date of Patent: August 2, 1994Assignee: Ciba-Geigy CorporationInventors: Karl F. Mueller, Walter L. Plankl
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Patent number: 5264511Abstract: Monomers, B-stage polymers, C-stage polymers, cured polymers and electricy conducting polymers of acetylene-terminated aromatic monomers containing three benzene rings separated by ethylene groups are disclosed. These new polymers can withstand aggressive environments and are particularly adapted for use in high temperature composites in addition to the utilization of their electrical conducting properties. Preparation of these materials is accomplished by melt polymerization and heat treatment at high temperatures.Type: GrantFiled: June 30, 1992Date of Patent: November 23, 1993Assignee: The United States of America as represented by the Secretary of the NavyInventor: Theordore R. Walton
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Patent number: 5260394Abstract: A novel styrene copolymer comprising a styrene repeating unit (a) represented by the general formula: ##STR1## (wherein R.sup.1 is a hydrogen atom or a hydrocarbon group having not more than 20 carbon atoms; n is an integer of 1 to 3 and when n is 2 or 3, R.sup.1 s may be the same or different) and olefin repeating unit (b) represented by the general formula: ##STR2## (wherein R.sup.2 is a hydrogen atom or a saturated hydrocarbon group having not more than 20 carbon atoms) or diene repeating unit, which contains 0.1 to 99.9 wt. % of said olefin repeating unit (b) or diene repeating unit (c) wherein intrinsic viscosity measured in 1,2,4-trichlorobenzene at 135.degree. C. is 0.07 to 20 dl/g and the stereoregularity of the styrene repeating unit chain is a high degree of syndiotactic configuration. This styrene copolymer is excellent in heat resistance and chemical resistance, and further it can be injection molded at low temperature, and has good compatibility with other resine and the like.Type: GrantFiled: October 5, 1990Date of Patent: November 9, 1993Assignee: Idemitsu Kosan Co., Ltd.Inventors: Toshinori Tazaki, Masahiko Kuramoto
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Patent number: 5242996Abstract: A modified epoxy resin or compound of the formula: ##STR1## wherein A is the backbone reside of a glycidyl ether epoxy resin with removal of the glycidyloxy groups; R.sup.1 and R.sup.2 are independently a hydrogen atom or C.sub.1 -C.sub.12 alkyl; R.sup.3 is a glycidyl group; and n is an integer of greater than 1. A method for producing the modified epoxy resin is also disclosed.Type: GrantFiled: May 22, 1991Date of Patent: September 7, 1993Assignee: Nippon Paint Co., Ltd.Inventors: Mitsuo Yamada, Kei Aoki, Ryuzo Mizuguchi
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Patent number: 5225515Abstract: Polybenzazole polymers may contain perfluorocyclobutane rings to provide a flexible moiety which is stable at high temperatures.Type: GrantFiled: April 17, 1991Date of Patent: July 6, 1993Assignee: The Dow Chemical CompanyInventors: Zenon Lysenko, William J. Harris
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Patent number: 5202402Abstract: Styrene copolymers having a repeating unit (I) represented by the general formula: ##STR1## and a repeating unit (II) represented by the general formula: ##STR2## (wherein all the symbols are as defined in the appended claims), and having the stereoregularity that is mainly syndiotactic, and cross-linked styrene copolymers obtained by cross-linking the above styrene copolymers. The styrene copolymers are reactive resins (heat-sensitive resins and radiation-sensitive resins) and are excellent in heat resistance and chemical resistance. The cross-linked styrene copolymers are excellent in heat resistance, chemical resistance and mechanical strength.Type: GrantFiled: April 11, 1991Date of Patent: April 13, 1993Assignee: Idemitsu Kosan Co., Ltd.Inventors: Keisuke Funaki, Masakazu Abe, Michitake Uoi
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Patent number: 5147741Abstract: Phenyl-endcapped depolymerizable polymers are disclosed. The phenyl endcap eliminates the reactive terminal vinyl group resulting in increased depolymerization threshold temperatures and reduced residue after depolymerization. A multilevel metal lift-off process using the phenyl-endcapped polymers is disclosed. Additionally, the polymers are improved ceramic glass binder resins.Type: GrantFiled: October 23, 1990Date of Patent: September 15, 1992Assignee: International Business Machines CorporationInventors: Constance J. Araps, Jon A. Casey, Renuka S. Divakaruni, Steven M. Kandetzke, Catherine A. Lotsko
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Fluorine and/or silicone containing poly(alkylene-oxide)-block copolymers and contact lenses thereof
Patent number: 5115056Abstract: Fluorine and/or silicone containing block copolymers are described which are the copolymerization product of mono; di- or trivinyl substituted poly(alkylene oxide) prepolymers (A) and fluoroalkyl-alkylene acrylates or methacrylates (B1), oligosiloxy-silyl alkyl-acrylates or methacrylates (B2), and optionally other copolymerizable comonomers (C). The novel block copolymers are prepared in solution or bulk and are characterized by high oxygen permeability, flexibility and wettability and are therefore well suited as biocompatible polymers, especially as contact lenses.Type: GrantFiled: February 28, 1990Date of Patent: May 19, 1992Assignee: Ciba-Geigy CorporationInventors: Karl F. Mueller, Walter L. Plankl -
Patent number: 5106930Abstract: A contact lens material which is lipophobic, easily machined and is oxygen permeable which comprises a copolymer comprising from 25% to 50% by weight of a polysiloxanylalkyl ester of acrylic or methacrylic acid, from 40% to 69% by weight of a fluorinated styrene, from 4% to 7% of a hydrophilic monomer, from 2% to 5% of a suitable cross-linking agent and from 0% to 2% of a UV absorber.Type: GrantFiled: July 21, 1989Date of Patent: April 21, 1992Assignee: Ioptex Research Inc.Inventor: Amitava Gupta
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Patent number: 5079319Abstract: Vinyl unsaturated copolymers are described which are obtained in a two-step process and which consist of monomeric units A, B, C, D and E, copolymerized in a first step, and in a second step reacted with a reactive vinyl monomer M.sub.v, and in which A is a siloxane or fluorine containing vinyl monomer, 30-70% by weight; B is NN-dimethylacrylamide or N-vinylpyrrolidone, 30-70% by weight; C is an active hydrogen containing vinyl monomer, 0.5-25% by weight; D are other copolymerizable comonomers, 0-30% by weight, and E is a chain transfer agent, 0-10 mol percent. M.sub.v is a vinyl unsaturated isocyanate.These vinyl unsaturated polymers are useful, either by themselves or in combination with other copolymerizable vinyl monomers, as heat or UV-curable coatings or glass, plastic, wood, paper, textiles, metal or ceramics, said coatings possessing low surface energies and low refractive indices.Type: GrantFiled: February 13, 1991Date of Patent: January 7, 1992Assignee: Ciba-Geigy CorporationInventor: Karl F. Mueller
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Patent number: 5066746Abstract: The present invention is a process for preparing a polymer having perfluorocyclobutane rings by the steps of (a) contacting monomers having at least two dimerizable perfluorovinyl groups; and (b) exposing the monomers to sufficient heat and for a sufficient time that a polymer containing perfluorocyclobutane rings is formed wherein at least about 0.05 mole percent of the monomer, have at least 3 dimerizable perfluorovinyl groups and polymers prepared thereby.Type: GrantFiled: June 7, 1990Date of Patent: November 19, 1991Assignee: The Dow Chemical CompanyInventors: Katherine S. Clement, David A. Babb, Bobby R. Ezzell
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Patent number: 5037918Abstract: A crosslinked polymer having perfluorocyclobutane rings is prepared in a process comprising the steps of: (a) contacting monomers having two dimerizable perfluorovinyl groups; (b) exposing the monomers to sufficient heat and for a sufficient time that a (linear) polymer containing perfluorocyclobutane rings is formed; and (c) exposing the polymer to sufficient crosslinking initiating means and for a sufficient time such that crosslinking occurs. Crosslinked polymers, so prepared are novel and have tensile strength and other physical proeprties enhanced over the properties of the corresponding linear polymer.Type: GrantFiled: December 15, 1989Date of Patent: August 6, 1991Assignee: The Dow Chemical CompanyInventor: David A. Babb
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Patent number: 5037917Abstract: A process for preparing a polymer having perfluorocyclobutane rings by the steps of (a) contacting monomers having at least two dimerizable perfluorovinyl groups; and (b) exposing the monomers to sufficient heat and for a sufficient time that a polymer containing perfluorocyclobutane rings is formed. The invention includes polymers having a backbone comprising hydrocarbyl groups, perfluorocyclobutane rings and non-carbon atoms and polymers of at least 10,000 molecular weight having repeating units [O-(CFR.sub.f).sub.n -O-perfluorocyclobutane].Type: GrantFiled: June 9, 1989Date of Patent: August 6, 1991Assignee: The Dow Chemical CompanyInventors: David A. Babb, Katherine S. Clement, W. Frank Richey, Bobby R. Ezzell
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Patent number: 4990582Abstract: An improved soft contact lens material, existing as a hydrogel, is formed by a polymer containing a fluorinated monomer, a hydroxyalkyl ester of acrylic or methacrylic acid, and an N-vinyl lactam. The polymer may also contain other hydrophilic and/or hard hydrophobic monomers, crosslinking agents, and uv-absorbing agents. Contact lenses made of these combinations have high water of hydrations, are highly wettable, have extremely high oxygen permeabilities and are resistant to protein deposits and other forms of attached debris.Type: GrantFiled: March 5, 1987Date of Patent: February 5, 1991Inventor: Joseph C. Salamone
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Patent number: 4987211Abstract: Phenyl-endcapped depolymerizable polymers are disclosed. The phenyl endcap eliminates the reactive terminal vinyl group resulting in increased depolymerization threshold temperatures and reduced residue after depolymerization. A multilevel metal lift-off process using the phenyl-endcapped polymers is disclosed. Additionally, the polymers are improved ceramic glass binder resins.Type: GrantFiled: October 13, 1989Date of Patent: January 22, 1991Assignee: International Business Machines CorporationInventors: Constance J. Araps, Jon A. Casey, Renuka S. Divakaruni, Steven M. Kandetzke, Chatherine A. Lotsko
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Patent number: 4987209Abstract: The compound 1,3-diethynyl tetrafluorobenzene, and compounds having the structure ##STR1## in which ##STR2## represents a perfluorinated benzene ring and X represents oxygen or sulfur, as well as homopolymers and copolymers thereof.Type: GrantFiled: December 7, 1988Date of Patent: January 22, 1991Assignee: The President and Fellows of HarvardInventors: Thomas X. Neenan, George M. Whitesides
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Patent number: 4946937Abstract: Vinylene copolymers composed of recurrent structural units of formula I ##STR1## wherein Ar denotes an aromatic or heterocyclic group, R denotes an inert substituent and n stands for an integer with a value from 0-8 and processes for their preparation.Type: GrantFiled: August 9, 1989Date of Patent: August 7, 1990Assignee: Bayer AktiengesellschaftInventors: Walter Heitz, Andreas Greiner