Peroxide Contains Halogen Atom Chemically Combined Therein Patents (Class 526/231)
  • Patent number: 10752716
    Abstract: Disclosed are copolymers and terpolymers chlorotrifluoroethylene and vinyl chloride having improved properties, and particularly a high glass transition temperature, for use in membranes, coatings, barrier films, and other applications and process for forming such copolymers and terpolymers, which are useful in reverse osmosis desalination, nanofiltration, ultrafiltration, microfiltration, membrane distillation, pervaporation, selective gas separation, batteries and fuel cells.
    Type: Grant
    Filed: May 12, 2018
    Date of Patent: August 25, 2020
    Assignee: HONEYWELL INTERNATIONAL INC.
    Inventors: Changqing Lu, Pascal Bolomey, Rajiv Ratna Singh, Paul Todaro
  • Patent number: 10011545
    Abstract: The invention relates to a process for the manufacture of a-iodoperfluoroalkanes and ?,?-diiodoperfluoroalkanes of general formula: (1) A(C2F4)n1, wherein: A is selected from F, CF3 and I and n is an integer equal to or higher than 1, with the proviso that, when A is F, n is an integer higher than 1 said process comprising heating a mixture [mixture (M1)] containing: —a compound selected from I2, CF3I, CF3CF2I and C2F4I2; —TFE; —and CO2 at definite temperatures and concentrations of CO2.
    Type: Grant
    Filed: April 9, 2015
    Date of Patent: July 3, 2018
    Assignee: SOLVAY SPECIALTY POLYMERS ITALY S.P.A.
    Inventors: Emanuela Antenucci, Letanzio Bragante, Marco Galimberti, Vito Tortelli
  • Patent number: 8575286
    Abstract: A polymer comprising recurring units derived from vinylidene fluoride (VDF) and trifluoroethylene (TrFE), such polymer comprising end groups of formula —CF2H and/or —CF2CH3 in an amount of at least 60 mmoles per kg of VDF recurring units [polymer (F)], a process for its manufacture and the use thereof as ferroelectric, piezoelectric, dielectric or pyroelectric material in electric/electronic devices.
    Type: Grant
    Filed: May 26, 2009
    Date of Patent: November 5, 2013
    Assignee: Solvay Solexis S.p.A.
    Inventors: Giulio Brinati, Alessio Marrani, Bernard Goffaux
  • Publication number: 20120302657
    Abstract: Composition which contains polymerizable binder and an initiator according to the following Formula I: R1—X—O—O—[Y—O—O—-]nR2??(Formula I) and having a large through-curing depth and a sufficiently long processing time and which cures without the development of high temperatures.
    Type: Application
    Filed: November 14, 2011
    Publication date: November 29, 2012
    Applicant: IVOCLAR VIVADENT AG
    Inventors: Norbert MOSZNER, Ulrich SALZ, Peter BURTSCHER, Robert LISKA, Astrid GUGG, Christian GORSCHE
  • Publication number: 20110082271
    Abstract: A polymer comprising recurring units derived from vinylidene fluoride (VDF) and trifluoroethylene (TrFE), such polymer comprising end groups of formula —CF2H and/or —CF2CH3 in an amount of at least 60 mmoles per kg of VDF recurring units [polymer (F)], a process for its manufacture and the use thereof as ferroelectric, piezoelectric, dielectric or pyroelectric material in electric/electronic devices.
    Type: Application
    Filed: May 26, 2009
    Publication date: April 7, 2011
    Applicant: SOLVAY SOLEXIS S.P.A.
    Inventors: Giulio Brinati, Alessio Marrani, Bernard Goffaux
  • Publication number: 20080306231
    Abstract: Disclosed herein are a novel perfluoroalkyl vinyl ether compound, a process for preparing a copolymer by using the perfluoroalkyl vinyl ether compound, and an optical plastic material comprising a copolymer prepared by the process. More specifically, the perfluoroalkyl vinyl ether has a particular molecular structure; the process is performed by copolymerizing the perfluoroalkyl vinyl ether compound with a common fluorinated olefin in the presence of a perfluorinated radical initiator; and, the optical plastic material comprises a copolymer prepared by the process and optionally a dopant. The copolymerization of the perfluoroalkyl vinyl ether with a common fluorinated olefin can provide a copolymer having a high molecular weight. In addition, appropriate control of the composition of the monomers can provide a completely amorphous copolymer.
    Type: Application
    Filed: February 21, 2008
    Publication date: December 11, 2008
    Applicant: Samsung electronics Co., Ltd.
    Inventors: Jin Taek Hwang, Do Yoon Kim, Jin Sung Choi, Boris Maximov, Victor Sergeevich Yuminov, Lev Feodorovich Sokolov
  • Patent number: 7125938
    Abstract: A polymerization process comprising initiating a first polymerization of monomers using an initiator functionalized with an ATRP initiating site, wherein the first polymerization is selected from the group of cationic polymerization, anionic polymerization, conventional free radical polymerization, metathesis, ring opening polymerization, cationic ring opening polymerization, and coordination polymerization to form a macroinitiator comprising an ATRP initiating site and further initiating an ATRP polymerization of radically polymerizable monomers using the macroinitiator comprising an ATRP initiating site. Novel block copolymers may be formed by the disclosed method.
    Type: Grant
    Filed: February 18, 2004
    Date of Patent: October 24, 2006
    Assignee: Carnegie Mellon University
    Inventors: Krzysztof Matyjaszewski, Scott G. Gaynor, Simion Coca
  • Patent number: 7087693
    Abstract: The invention relates to a process to make and use specific diacyl peroxides in polymerization reactions. The peroxides are produced and used in a polymerization process within a short timeframe in order to overcome stability issues associated with them.
    Type: Grant
    Filed: February 20, 2003
    Date of Patent: August 8, 2006
    Assignee: Akzo Nobel N.V.
    Inventors: Marinus Catharinus Tammer, Johannes Jacobus Theodorus De Jong, Johannes Willibrordus Antonius Overkamp
  • Patent number: 6812313
    Abstract: A polymer comprises polymer chains having a glass transition temperature of less than 25° C. and a weight average molecular weight of less than 20,000 wherein the polymer chains contain at least one non-functional aromatic end-group. The polymer is miscible in the uncured state of said thermoset resins and immiscible in the cured state of the thermoset resins.
    Type: Grant
    Filed: June 18, 2002
    Date of Patent: November 2, 2004
    Assignee: Rohm and Haas Company
    Inventor: Edward Ewart La Fleur
  • Patent number: 6812302
    Abstract: A process for preparing a liquid rubber composition comprises: (a) Forming a reaction mixture of (i) from 1.0 to 99.999 weight percent of the reaction mixture of at least one C1-C20 alkyl acrylate monomer; and (ii) from 0.001 to 20 weight percent of the reaction mixture of at least one aromatic-containing initiator; (b) charging the reaction mixture into a reactor maintained at a reaction temperature of up to 400° C.; and (c) polymerizing said monomer with said aromatic-containing initiator to form a liquid rubber with polymer chains having at least one non-functional aromatic end-group.
    Type: Grant
    Filed: June 18, 2002
    Date of Patent: November 2, 2004
    Assignee: Rohm and Haas Company
    Inventor: Edward Ewart La Fleur
  • Publication number: 20040198936
    Abstract: Perfluorodiacylperoxides having the following structures: 1
    Type: Application
    Filed: April 27, 2004
    Publication date: October 7, 2004
    Applicant: Solvay Solexis S.p.A.
    Inventors: Walter Navarrini, Marco Galimberti
  • Patent number: 6747109
    Abstract: Perfluorodiacylperoxides having the following structures: wherein: when Rf is F, Rf′, Rf″ are both —CF3; when Rf is —CF3, Rf′, Rf″, are C1-C3 linear or branched perfluorooxyalkyl groups; said perfluorodiacylperoxides being such as to meet the following proviso: the thermal decomposition constants Kd (sec−1) in the presence of water do not undergo substantial variations with respect to the thermal decomposition constants in absence of water.
    Type: Grant
    Filed: March 4, 2002
    Date of Patent: June 8, 2004
    Assignee: Solvay Solexis S.p.A
    Inventors: Walter Navarrini, Marco Galimberti
  • Patent number: 6528600
    Abstract: 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: Grant
    Filed: July 24, 2001
    Date of Patent: March 4, 2003
    Assignee: Asahi Glass Company, Limited
    Inventors: Atsushi Funaki, Naoko Sumi
  • Patent number: 6407187
    Abstract: A new polymerization process (atom transfer radical polymerization, or ATRP) based on a redox reaction between a transition metal (e.g., Cu(I)/Cu(II), provides “living” or controlled radical polymerization of styrene, (meth)acrylates, and other radically polymerizable monomers. Using various simple organic halides as model halogen atom transfer precursors (initiators) and transition metal complexes as a model halogen atom transfer promoters (catalysts), a “living” radical polymerization affords (co)polymers having the predetermined number average molecular weight by &Dgr;[M]/[I]0 (up to Mn>105) and a surprisingly narrow molecular weight distribution (Mw/Mn), as low as 1.15. The participation of free radical intermediates in ATRP is supported by end-group analysis and stereochemistry of the polymerization. In addition, polymers with various topologies (e.g.
    Type: Grant
    Filed: March 3, 1998
    Date of Patent: June 18, 2002
    Assignee: Carnegie Mellon University
    Inventors: Krzysztof Matyjaszewski, Jin-Shan Wang
  • Patent number: 6346587
    Abstract: The present invention relates to a process for the production of partially fluorinated fluoropolymers, in accordance with which fluoromonomers are free-radically polymerized in the presence of polyfluoropropanes or polyfluorobutanes of the formulae CF3—CH2—CF2H, CF3—CHF—CF2—H, CF3—CH2—CF3, CHF2—CF2—CH2F, CF3—CH2—CF2—CH3 AND CF3—CHF—CF2—CH3 and optionally a chain-transfer agent.
    Type: Grant
    Filed: September 18, 2000
    Date of Patent: February 12, 2002
    Assignee: Bayer Aktiengesellschaft
    Inventors: Ralf Krüger, Gerhard Heilig, Claus Dieter Sommerfeld
  • Patent number: 6221987
    Abstract: A method for producing a fluorine-containing polymer, which comprises subjecting the following fluorine-containing monomer (a), (b), (c) or (d) to bulk polymerization by means of a polymerization initiator comprising a fluorine-containing organic peroxide having a 10 hour half value temperature of from 30 to 130° C., to obtain a fluorine-containing polymer having a fluorine-containing alicyclic structure in its main chain: (a) a fluorine-containing monomer having a fluorine-containing alicyclic structure, (b) a fluorine-containing monomer having at least two polymerizable double bonds, (c) the fluorine-containing monomer (a) and the fluorine-containing monomer (b), (d) at least one fluorine-containing monomer selected from the fluorine-containing monomers (a) and (b), and another fluorine-containing monomer other than the fluorine-containing monomers (a) and (b).
    Type: Grant
    Filed: April 14, 1999
    Date of Patent: April 24, 2001
    Assignee: Asahi Glass Company Ltd.
    Inventor: Norihide Sugiyama
  • Patent number: 5981673
    Abstract: The present invention provides a process for making fluorinated polymers and copolymers having stable end groups. The process includes (1) contacting a fluoromonomer, an initiator capable of producing stable end groups on the polymer chain, and a polymerization medium comprising carbon dioxide, and (2) polymerizing the fluoromonomer. The polymerization medium preferably comprises liquid or supercritical carbon dioxide. Advantageously, the process may also include the step of separating the fluoropolymer from the polymerization medium. The present invention also provides polymerization reaction mixtures useful in the processes of the present invention.
    Type: Grant
    Filed: March 16, 1998
    Date of Patent: November 9, 1999
    Assignee: The University of North Carolina at Chapel Hill
    Inventors: Joseph M. DeSimone, Timothy Romack
  • Patent number: 5939501
    Abstract: The present invention provides a process for making fluorinated polymers and copolymers having stable end groups. The process includes (1) contacting a fluoromonomer, an initiator capable of producing stable end groups on the polymer chain, and a polymerization medium comprising carbon dioxide, and (2) polymerizing the fluoromonomer. The polymerization medium preferably comprises liquid or supercritical carbon dioxide. Advantageously, the process may also include the step of separating the fluoropolymer from the polymerization medium.The present invention also provides polymerization reaction mixtures useful in the processes of the present invention.
    Type: Grant
    Filed: July 17, 1996
    Date of Patent: August 17, 1999
    Assignee: The University of North Carolina at Chapel Hill
    Inventors: Joseph M. DeSimone, Timothy Romack
  • Patent number: 5837782
    Abstract: A novel bis(mono- or diperoxyoxalate) composition of Structure A, ##STR1## and use of the novel bis(mono- or diperoxyoxalate) composition as an initiators for curing of unsaturated polyester resins and for polymerizing ethylenically unsaturated monomers are disclosed.
    Type: Grant
    Filed: October 10, 1997
    Date of Patent: November 17, 1998
    Assignee: Elf Atochem North America, Inc.
    Inventor: Jose Sanchez
  • Patent number: 5618894
    Abstract: The present invention provides a process for making fluorinated polymers and copolymers having stable end groups. The process includes (1) contacting a fluoromonomer, an initiator capable of producing stable end groups on the polymer chain, and a polymerization medium comprising carbon dioxide, and (2) polymerizing the fluoromonomer. The polymerization medium preferably comprises liquid or supercritical carbon dioxide. Advantageously, the process may also include the step of separating the fluoropolymer from the polymerization medium.The present invention also provides polymerization reaction mixtures useful in the processes of the present invention.
    Type: Grant
    Filed: June 1, 1995
    Date of Patent: April 8, 1997
    Assignee: The University of North Carolina
    Inventors: Joseph M. DeSimone, Timothy Romack
  • Patent number: 5569728
    Abstract: The invention relates to a (co)polymerization process in suspension for preparing hydrogen containing thermoplastic fluoropolymers, such as for instance ethylene/chlorotrifluoro-ethylene or ethylene/tetrafluoroethylene copolymers, or vinylidenefluoride homopolymers or copolymers, wherein bis-dichlorofluoroacetylperoxide (CFCl.sub.2 --CO--O).sub.2 (DCFAP) is used as polymerization initiator. From such process products endowed with high thermal stability, remarkably higher than that obtainable using bis-trichloroacetylperoxide (TCAP), are obtained.
    Type: Grant
    Filed: March 16, 1995
    Date of Patent: October 29, 1996
    Assignee: Ausimont, S.p.A.
    Inventors: Julio A. Abusleme, Piero Gavezotti
  • Patent number: 5414065
    Abstract: A polymer comprising fluoroalkyl group has a structure in which one or two parts of the fluoroalkyl group at the one or both ends of the molecule are linked to a part of alkylene groups or alkylene groups substituted with halogen, a part of alkylene group substituted with functional groups, such as halogen, cyano group, alkylsulfonic acid group, amidoalkylsulfonic acid group, carboxylic acid group, carboxyl group, oxycarbonyl group, ether group, epoxy group and the like, and/or a part of silicone group. A method of preparation of the polymer comprising fluoroalkyl group contains reaction of a fluoroalkanoyl peroxide with a monomer comprising the functional group or a monomer comprising silicone group. A surface active agent comprises fluoroalkyl group and caroxylic acid salt group. A surface treatment agent comprises the polymer comprising fluoroalkyl group, hydrolysis products thereof, hydrolytic condensation products thereof, and mixtures thereof.
    Type: Grant
    Filed: June 21, 1994
    Date of Patent: May 9, 1995
    Assignee: NOF Corporation
    Inventors: Hideo Sawada, Keiji Komoto, Masahiro Sano, Yutaka Enokida, Mitani Motohiro, Takeo Matsumoto, Masaharu Nakayama, Masato Okajima
  • Patent number: 5399643
    Abstract: A method for preparing a tetrafluoroethylene/hexafluoropropylene copolymer by polymerizing tetrafluoroethylene and hexafluoropropylene in an aqueous medium using a di(fluoroacyl) peroxide as a polymerization initiator characterized in that a fluoroalkylcarboxylic acid is added gives a stable molecular weight of the tetrafluoroethylene/hexafluoropropylene copolymer and an increased utilization efficiency of the polymerization initiator.
    Type: Grant
    Filed: March 17, 1994
    Date of Patent: March 21, 1995
    Assignee: Diakin Industries Ltd.
    Inventors: Tomohisa Noda, Hiroyuki Honda, Chuzo Okuno
  • Patent number: 5324803
    Abstract: A polymer comprising fluoroalkyl group has a structure in which one or two parts of the fluoroalkyl group at the one or both ends of the molecule are linked to a part of alkylene groups or alkylene groups substituted with halogen, a part of alkylene group substituted with functional groups, such as halogen, cyano group, alkylsulfonic acid group, amidoalkylsulfonic acid group, carboxylic acid group, carboxyl group, oxycarbonyl group, ether group, epoxy group and the like, and/or a part of silicone group. A method of preparation of the polymer comprising fluoroalkyl group contains reaction of a fluoroalkanoyl peroxide with a monomer comprising the functional group or a monomer comprising silicone group. A surface active agent comprises fluoroalkyl group and caroxylic acid salt group. A surface treatment agent comprises the polymer comprising fluoroalkyl group, hydrolysis products thereof, hydrolytic condensation products thereof, and mixtures thereof.
    Type: Grant
    Filed: October 13, 1992
    Date of Patent: June 28, 1994
    Assignee: NOF Corporation
    Inventors: Hideo Sawada, Keiji Komoto, Masahiro Sano, Yutaka Enokida, Motohiro Mitani, Takeo Matsumoto, Masaharu Nakayama, Masato Okajima
  • Patent number: 5126418
    Abstract: Alkenylaminomethylenephosphonic acids of the formula ##STR1## in which R.sub.1 is hydrogen, C.sub.4 -C.sub.10 -alkyl, phenyl, naphthyl, methylphenyl, hydroxyphenyl, methoxyphenyl, methylnaphthyl, hydroxynaphthyl or methoxynaphthyl,R.sub.2 is hydrogen,R.sub.3, R.sub.4, R.sub.5 are hydrogen or methyl,R.sub.5 is hydrogen, C.sub.1 -C.sub.4 -alkyl or phenyl, andM is hydrogen or a cation,and copolymers comprising 0.1-99.9% by weight, preferably 1-50% by weight, of one or more monomers of the formula I, in which R.sub.2 is hydrogen or a group of the formula--CH.sub.2 PO.sub.3 M.sub.2, and 99.9-0.1% by weight, preferably 99-50% by weight, of one or more monomers of the formula IIR.sub.1 'R.sub.2 'C.dbd.CR.sub.3 'X (II)in whichR.sub.1 ' is hydrogen or a group of the formula --COOM,R.sub.2 ' is hydrogen, phenyl or a group of the formula --COOM,R.sub.3 ' is hydrogen, methyl or a group of the formula --COOM or --CH.sub.2 COOM,X is a group of the formula --COOM orR.sub.2 ' and R.sub.3 ' together are a C.sub.
    Type: Grant
    Filed: January 17, 1991
    Date of Patent: June 30, 1992
    Assignee: Hoechst Aktiengesellschaft
    Inventors: Christoph Porz, Gerd Reinhardt, Hermann Hoffmann
  • Patent number: 5019632
    Abstract: A free-radical initiated process for preparing fluorinated polymers wherein at least one gaseous fluoroolefin is polymerized in a stirred polymerizer, the improvement comprising preparing a non-volatile polymeric seed in a reaction zone separate from the polymerizer by decomposing initiator in the presence of fluoromonomer to form oligomeric free radicals and condensing said radicals onto previously prepared polymer; and conveying said non-volatile seed to the polymerizer.
    Type: Grant
    Filed: August 28, 1989
    Date of Patent: May 28, 1991
    Assignee: E. I. Du Pont de Nemours and Company
    Inventors: Edgar W. Slocum, Aquiles C. Sobrero, Robert C. Wheland
  • Patent number: 4861845
    Abstract: The polymerization of fluoromonomers can be accomplished without fouling by using gaseous monomers in the presence of at least one nonvolatile initiator and by recycling the initiator-free polymerizer gases through an external cooler.
    Type: Grant
    Filed: March 10, 1988
    Date of Patent: August 29, 1989
    Assignee: E. I. Du Pont de Nemours and Company
    Inventors: Edgar W. Slocum, Aquiles C. Sobrero, Robert C. Wheland
  • Patent number: 4837287
    Abstract: This disclosure relates to novel peroxy esters carrying a t-alkenyl, e.g. 2-methyl-3-buten-2-yl, peroxy group. These peroxy esters have shorter half-life periods of decomposition and are more reactive polymerization initiators and unsaturated polyester resin curing agents than the corresponding prior art peroxy esters carrying a t-alkyl, e.g. t-amyl, peroxy group.
    Type: Grant
    Filed: June 24, 1987
    Date of Patent: June 6, 1989
    Assignee: Akzo N.V.
    Inventor: John Meijer
  • Patent number: 4777230
    Abstract: A process is provided for the free radical polymerization of monomers derived from substituted or unsubstituted acrylic acid/methacrylic acid and esters thereof for the production of a polymer having a narrow molecular weight distribution and an average molecular weight of less than 4000. These polymers are produced by the solution polymerizing of said monomers wherein 20-40% by weight of the monomer composition is hydroxyalkyl acrylate or methacrylate in the presence of a solvent system suitable for high solids coating applications and in the presence of an initiating amount of a tertiary alkyl hydroperoxide and/or its derivatives having at least 5 carbons wherein the initiator and monomers, alone or in combination, are added continuously at a programmed rate wherein the rate of addition corresponds approximately to the rate of decomposition of said monomer and initiator. These polymers are used for high solids coating applications.
    Type: Grant
    Filed: December 12, 1986
    Date of Patent: October 11, 1988
    Assignee: Pennwalt Corporation
    Inventor: Vasanth R. Kamath
  • Patent number: 4663407
    Abstract: A novel fluorine-containing diacylperoxide of the formula:[RO-CH.sub.2 CF.sub.2 CF.sub.2 O-.sub.n CH.sub.2 CF.sub.2 COO-.sub.2 (I)wherein R is a C.sub.1 -C.sub.10 hydrocarbon group or halogen-containing hydrocarbon group, and n is an integer of 0 to 3, which can initiate polymerization of an ethylenically unsaturated monomer at a relatively low temperature.
    Type: Grant
    Filed: September 19, 1986
    Date of Patent: May 5, 1987
    Assignee: Daikin Industries Ltd.
    Inventors: Masahiko Oka, Shigeru Morita
  • Patent number: 4588796
    Abstract: A process for the polymerization of fluorinated olefin monomers using a fluoroxy compound solution as initiator, wherein said solution has a fluoroxy compound concentration of at least 0.5 meq/liter. The concentration contains, based on the total number of fluoroxy compounds present, about 35 to 100% of an acyl hypofluorite of the formula RCOOF wherein R is X(CF.sub.2).sub.n -- or CF.sub.3 CF.sub.2 CF.sub.2 O[CF(CF.sub.3)CF.sub.2 O].sub.m CF(CF.sub.3)-- wherein n is 1 to 16, m is 0 to 50, and X is H or F.
    Type: Grant
    Filed: May 31, 1985
    Date of Patent: May 13, 1986
    Assignee: E. I. Du Pont de Nemours and Company
    Inventor: Robert C. Wheland
  • Patent number: 4535136
    Abstract: A process for the polymerization of fluorinated olefin monomers using a fluoroxy compound solution as initiator, wherein said solution has a fluoroxy compound concentration of at least 0.5 meq/liter. The concentration contains, based on the total number of fluoroxy compounds present, about 35 to 100% of an acyl hypofluorite of the formula X(CF.sub.2).sub.n COOF wherein X is H or F and n is 1 to 16.
    Type: Grant
    Filed: April 23, 1984
    Date of Patent: August 13, 1985
    Assignee: E. I. Du Pont De Nemours and Company
    Inventor: Robert C. Wheland
  • Patent number: 4521575
    Abstract: A copolymer comprising monomeric units of tetrafluoroethylene, ethylene and at least one monomeric compound selected from the group consisting of 2-trifluoromethylpropylene and 2-methyl-1,1,3,3,3-pentafluoropropylene, which has a improved crack resistance at a high temperature.
    Type: Grant
    Filed: February 2, 1984
    Date of Patent: June 4, 1985
    Assignee: Daikin Kogyo Co., Ltd.
    Inventors: Shinichi Nakagawa, Kiyohiko Ihara
  • Patent number: 4499249
    Abstract: A process for preparing a tetrafluoroethylene/fluoro(alkyl vinyl ether) copolymer comprising polymerizing tetrafluoroethylene and fluoro(alkyl vinyl ether) in an aqueous suspension system which comprises a mixed medium of water and a fluorohydrocarbon or a chlorofluorohydrocarbon in a volume ratio of from 1:1 to 10:1 at a temperature of from 0.degree. to 25.degree. C. in the presence of a polymerization initiator of the formula:[Cl(CF.sub.2).sub.n --COO].sub.2 (I)wherein n is an integer of 1 to 10, the copolymer obtained by the process having a small number of unstable terminal groups and excellent flex life.
    Type: Grant
    Filed: April 28, 1983
    Date of Patent: February 12, 1985
    Assignee: Daikin Kogyo Co., Ltd.
    Inventors: Shinichi Nakagawa, Tsuneo Nakagawa, Sadaatsu Yamaguchi, Kiyohiko Ihara, Toshihiko Amano, Mitsugu Omori, Kohzoh Asano
  • Patent number: 4387044
    Abstract: A safe, dry and free-flowing solid peroxide/unsubstituted or alkyl substituted benzoic acid composition is prepared by mixing the solid peroxide, such as diacyl peroxide, dialkyl peroxydicarbonate, dialkyl peroxide or alkylidene diperoxide, which melts above 30.degree. C., with solid benozic acid or an alkyl substituted benzoic acid, which melts above 40.degree. C. This solid peroxide composition is used as an initiator for the polymerization of ethylenically unsaturated monomers, such as styrene, and for curing of unsaturated polyester resins and diethylene glycol bis(allyl carbonate). This solid peroxide composition exhibits improved safety characteristics such as delayed ignition times when in contact with a flame and increased thermal stabilities compared to similar prior art peroxide formulations.
    Type: Grant
    Filed: October 5, 1981
    Date of Patent: June 7, 1983
    Assignee: Pennwalt Corporation
    Inventors: Jose Sanchez, Solomon C. Westbrook, Jr.
  • Patent number: 4376719
    Abstract: Stable aqueous dispersions of free radical-generating polymerization initiators that are solid at temperatures above 0.degree. C. are prepared safely and efficiently by homogenizing a suspension of the initiator in an aqueous system that contains small amounts of a suspending agent and a wetting agent.
    Type: Grant
    Filed: July 15, 1981
    Date of Patent: March 15, 1983
    Assignee: Tenneco Chemicals, Inc.
    Inventors: Donald Goodman, Mario Q. Ceprini, Samuel Hoch, Marvin Koral
  • Patent number: 4345020
    Abstract: A cross-linkable positive-working ionizing radiation-resist or ultraviolet ray-resist polymer composition including: in polymerized form,(a) units derived from a methacrylic acid ester of the formula:CH.sub.2 .dbd.C(CH.sub.3).COORwhere R is an alkyl or haloalkyl group having from 1 to 6 carbon atoms, benzyl or cyclohexyl,(b) units derived from a monoolefinically unsaturated carboxylic acid having from 3 to 12 carbon atoms and from 1 to 3 carboxyl groups, and(c) units derived from methacrylic acid chloride.The amount of the units (c) in the polymer composition is such that the number of moles of the units (b), multiplied by the number of the carboxyl group or groups in each of the units (b), ranges from about 1 to about 20% based on the total number of moles of the units (a), (b) and (c); the amount of the units (c) ranges from about 0.05 to about 3.
    Type: Grant
    Filed: December 3, 1980
    Date of Patent: August 17, 1982
    Assignee: Fujitsu Limited
    Inventors: Yasuhiro Yoneda, Toshisuke Kitakohji, Kenro Kitamura
  • Patent number: 4315082
    Abstract: Compositions comprising organic phosphorus compounds having a peroxygen group which is either a hydroperoxyalkyl (H--OO--C--) group or a peroxyether (--C--OO--C--) group. There is at least one such group per 500 phosphorus atoms in the composition. These peroxygen compounds may be made by passing oxygen through a liquid comprising a phosphorus compound which has an aliphatic carbon, having an abstractable hydrogen, directly attached to a carbon of an aryl ring; for example, an isopropylphenyl phosphate. The peroxygen compounds may be added to compositions comprising peroxide-reactive organic polymers to increase flame resistance.
    Type: Grant
    Filed: July 26, 1979
    Date of Patent: February 9, 1982
    Assignee: FMC Corporation
    Inventors: Harry H. Beacham, Robert D. Norris
  • Patent number: 4307217
    Abstract: Dialkyl diacyl peroxides in which the alpha carbon atom of one of the alkyl groups is secondary and substituted by chloro and alkyl. The compounds are useful as polymerization initiators of ethylenically unsaturated monomers such as vinyl chloride.
    Type: Grant
    Filed: March 6, 1981
    Date of Patent: December 22, 1981
    Assignee: Argus Chemical Corporation
    Inventors: Reidar Halle, David Peterson, Roger N. Lewis
  • Patent number: 4302569
    Abstract: Novel mono and di peroxyesters characterized by chloro-substitution of a tertiary carbon atom at the alpha position relative to the carbonyl group(s), the monoperoxyesters having no less than 9 carbon atoms and the diperoxyesters having no less than 16 carbon atoms, are utilized as polymerization initiators. Typical is the polymerization of styrene and the copolymerization of vinyl chloride and vinyl acetate.
    Type: Grant
    Filed: November 3, 1980
    Date of Patent: November 24, 1981
    Assignee: Argus Chemical Corporation
    Inventors: Reidar Halle, David Peterson
  • Patent number: 4279831
    Abstract: Dialkyl diacyl peroxides in which the alpha carbon atom of one of the alkyl groups is secondary and substituted by chloro and alkyl. The compounds are useful as polymerization initiators of ethylenically unsaturated monomers such as vinyl chloride.
    Type: Grant
    Filed: August 10, 1979
    Date of Patent: July 21, 1981
    Assignee: Argus Chemical Corporation
    Inventors: Reidar Halle, David Peterson, Roger N. Lewis
  • Patent number: 4278612
    Abstract: Novel mono and di peroxyesters characterized by chloro-substitution of a tertiary carbon atom at the alpha position relative to the carbonyl group(s), the monoperoxyesters having no less than 9 carbon atoms and the diperoxyesters having no less than 16 carbon atoms, are utilized as polymerization initiators. Typical is the polymerization of styrene and the copolymerization of vinyl chloride and vinyl acetate.
    Type: Grant
    Filed: November 28, 1979
    Date of Patent: July 14, 1981
    Assignee: Argus Chemical Corporation
    Inventors: Reidar Halle, David Peterson
  • Patent number: 4131729
    Abstract: An improved dental composition having shortened hardening time and after hardening increased compressive strength and abrasion resistance, including a radical-inducing compound and a polymerizable acrylic or methacrylic acid ester or diester compound with at least 20 percent by weight of the polymerizable compound being the diacrylic or dimethacrylic acid ester of bishydroxymethyltricyclo [5.2.1.0.sup.2,6 ]-decane. Other monofunctional or difunctional acrylic or methacrylic acid esters as well as fillers, pigments and stabilizers can be included.
    Type: Grant
    Filed: April 21, 1978
    Date of Patent: December 26, 1978
    Assignee: ESPE Fabrik Pharmazeutischer Praparate GmbH
    Inventors: Werner Schmitt, Robert Purrmann, Peter Jochum, Wolf-Dietrich Zahler
  • Patent number: 4129708
    Abstract: A vulcanizable polyacrylate elastomer composition having improved resistance to hydrocarbon oils is provided which comprises one or more lower alkyl acrylic acid ester monomers polymerized with a comonomer containing either a halogen or an epoxy group, in the presence of from about 0.25 to 10 percent, by weight of total monomer, of a low molecular weight, unsaturated polymer of butadiene or isoprene or copolymers thereof with styrene or acrylonitrile. In addition, a process for preparing such elastomer compositions is also provided, together with the vulcanization of such elastomers and the resulting vulcanized polyacrylate.
    Type: Grant
    Filed: October 7, 1977
    Date of Patent: December 12, 1978
    Assignee: American Cyanamid Company
    Inventors: Guido Mino, Rudolf A. Behrens
  • Patent number: 4102815
    Abstract: Organic peroxide polymerization co-initiator compositions and their use in the initiation of the polymerization of certain monomers and comonomers such as vinyl chloride, ethylene and methyl methacrylate. The co-initiator composition contains an alpha halo substituted diacyl peroxide and a coperoxide selected from t-alkyl peresters of t-hydroperoxides, peroxydicarbonates, acyl peroxycarbonic esters, and aliphatic diacyl peroxides. Typical is acetyl 2-chlorooctanoyl peroxide with t-butyl peroxy neodecanoate.
    Type: Grant
    Filed: November 8, 1976
    Date of Patent: July 25, 1978
    Assignee: Argus Chemical Corporation
    Inventors: Ronald L. Friedman, deceased, Roger N. Lewis
  • Patent number: 4092470
    Abstract: Stable, pumpable, highly concentrated aqueous suspensions of organic peroxides containing (a) nonionic emulsifiers having a maximum HLB value of 12.5 and (b) nonionic emulsifiers having a minimum HLB value of 12.5 or anionic emulsifiers.
    Type: Grant
    Filed: February 28, 1977
    Date of Patent: May 30, 1978
    Assignee: Akzona Incorporated
    Inventors: Hendrik Harm Jannes Oosterwijk, Reinder Torenbeek
  • Patent number: 4071677
    Abstract: Asymmetrical organic diacyl peroxide polymerization initiators having enhanced initiator efficiency and characterized by the presence of an acyclic acyl group of four or more carbon atoms having bromo or halo substitution at the alpha carbon atom, the other acyl group being different and heterosubstituted. However, when the alpha-halosubstituted acyl group is branched chain the other acyl group may be hydrocarbon.
    Type: Grant
    Filed: March 4, 1977
    Date of Patent: January 31, 1978
    Assignee: Argus Chemical Corporation
    Inventor: Donald W. Wood
  • Patent number: 4033939
    Abstract: Stress-crack resistant terpolymers of from about 40 to 60 mol percent ethylene, about 60 to 40 mol percent of a halogenated comonomer selected from the group consisting of tetrafluoroetylene, chlorotrifluoroethylene and mixtures thereof and about 0.1 to 10 mol percent of a termonomer selected from the group consisting of 3,3,3-trifluoro-2-trifluoromethyl propene, a vinyl monomer which is free of telogenic activity and which provides a side chain having at least two carbon atoms, the side chain being aromatic or having its elements bonded by a single bond only, and mixtures thereof, and containing high and low molecular weight components such that: ##EQU1## WHEREIN X.sub.i represents the weight fraction of each high molecular weight component i;Mw represents the weight-average molecular weight of the terpolymer,Mw.sub.i represents the weight-average molecular weight of each component i, ##EQU2## WHEREIN X.sub.j represents the weight fraction of each low molecular weight component j;Mw.sub.
    Type: Grant
    Filed: January 19, 1976
    Date of Patent: July 5, 1977
    Assignee: Allied Chemical Corporation
    Inventor: Stephen R. Schulze
  • Patent number: 4020253
    Abstract: Stress-crack resistant copolymers of from about 40 to 60 mol percent ethylene and 60 to 40 percent of a halogenated comonomer selected from the group consisting of tetrafluoroethylene and chlorotrifluoroethylene and mixtures thereof and containing high and low molecular weight components such that: ##EQU1## WHEREIN X.sub.i represents the weight fraction of each high molecular weight component i;Mw represents the weight-average molecular weight of the copolymer;Mw.sub.1 represents the weight-average molecular weight of each component i; ##EQU2## WHEREIN X.sub.j represents the weight fraction of each low molecular weight component j, andMw.sub.j represents the weight-average molecular weight of each component j, and0.1 .ltoreq. f .ltoreq. 0.95.
    Type: Grant
    Filed: April 2, 1975
    Date of Patent: April 26, 1977
    Assignee: Allied Chemical Corporation
    Inventor: Stephen R. Schulze
  • Patent number: RE32199
    Abstract: Tough, stable copolymers of tetrafluoroethylene monomer and fluorovinyl ether monomers can be produced by polymerizing the monomers in perfluorinated or suitable non-perfluorinated hydrogen and chlorine containing fluorocarbon solvents by a process that requires that the reaction be carried out at from about 30.degree. to about 75.degree. C. in the presence of a low temperature initiator such as bis(perfluoro propionyl) peroxide and a hydrogen containing chain transfer agent such as methanol.
    Type: Grant
    Filed: February 27, 1985
    Date of Patent: July 8, 1986
    Assignee: E. I. Du Pont de Nemours and Company
    Inventor: Dana P. Carlson