With Preservative Or Stabilizer Patents (Class 568/559)
  • Patent number: 9951006
    Abstract: The present application relates to a method for producing powdered lauroyl peroxide which is characterized in that a reaction mixture is used which comprises water, lauric acid chloride, hydrogen peroxide, an inorganic base and an alkane.
    Type: Grant
    Filed: November 26, 2015
    Date of Patent: April 24, 2018
    Assignee: United Initiators GmbH
    Inventors: Dominik Hermann, Iris Nagl, Hanno Wolf
  • Patent number: 8998593
    Abstract: A fluid end assembly including a pump housing with a number of interior passages for the flow of fluids. The housing has a plunger bore with a closed inner end and an open outer end. A suction passage intersects the plunger bore. A discharge passage intersects both the plunger bore and the suction passage such that the discharge passage, the suction passage, and the plunger bore radiate outwardly from their point of intersection to define a shape resembling a “Y”. A connector passage branches from the discharge passage. An outlet passage intersects the connector passage and passes through the pump housing at right angles to the plunger bore. A reciprocating plunger is located in the plunger bore. A suction valve is located in the suction passage. A discharge valve is located in the discharge passage. A fluid supply manifold is pivotally secured to the housing and is in fluid communication with the suction passage.
    Type: Grant
    Filed: February 24, 2010
    Date of Patent: April 7, 2015
    Assignee: J-Mac Tool, Inc.
    Inventor: Berton L. Vicars
  • Patent number: 7759438
    Abstract: The present invention relates to an aqueous dispersion polymerization process for preparing a (co)polymer wherein an organic peroxide is used as initiator (as a source of free radicals) during the polymerization process in conjunction with an effective amount of an organic peroxide stabilizing additive (controlling agent). The invention also relates to formulations comprising an organic peroxide and an effective amount of an organic peroxide stabilizing additive suitable for use in said polymerization process. The invention finally relates to 10 (co)polymers obtainable by the dispersion polymerization process.
    Type: Grant
    Filed: June 18, 2004
    Date of Patent: July 20, 2010
    Assignee: Akzo Nobel N.V.
    Inventors: Johannes Jacobus Theodorus De Jong, Johannes Willibrordus Antonius Overkamp, Andreas Petrus Van Swieten, Koen Antoon Kornelis Vanduffel, Hans Westmijze
  • Patent number: 7141702
    Abstract: The present invention provides an improved process for the synthesis of ?-substituted acroleins from olefins by a tandem hydroformylation and Mannich reaction sequence in the presence of syngas and formaldehyde, wherein the two catalysts are segregated into two different phases thereby preventing deactivation of the catalysts by each other, and yielding a highly selective and active catalyst.
    Type: Grant
    Filed: March 26, 2004
    Date of Patent: November 28, 2006
    Assignee: Council of Scientific and Industrial Research
    Inventors: Raj M. Deshpande, Makarand M. Diwakar, Raghunath V. Chaudhari
  • Patent number: 6992225
    Abstract: The invention concerns a heat stabilizer of organic peroxides characterized in that it is an N-hetrocyclic compound which contains at least one nitroxyl radical with the N atom of the nitroxyl radical forming part of the ring. The invention also concerns a storage-stable and heat-stable organic peroxide composition containing an N-hetrocyclic compound which contains at least one nitroxyl radical with the N atom of the nitroxyl radical forming part of the ring, the method for preparing the same and uses thereof for modifying polymers.
    Type: Grant
    Filed: April 30, 2002
    Date of Patent: January 31, 2006
    Assignee: Arkema
    Inventors: Sandra Grimaldi, Olivier Guerret, Jean-Luc Couturier, Fabien Debaud
  • Patent number: 6803436
    Abstract: The invention relates to a method to safely produce, handle and transport packaged organic peroxide formulations comprising a reactive phlegmatiser and to the use of such packaged material in polymerisation and polymer modification processes, particularly the high-pressure (co)polymerisation process of ethylene and/or the suspension (co)polymerisation process of styrene.
    Type: Grant
    Filed: December 19, 2001
    Date of Patent: October 12, 2004
    Assignee: Akzo Nobel N.V.
    Inventors: Petrus Paulus Waanders, Bart Fischer, Johannes Isodorus Roes
  • Patent number: 6677466
    Abstract: The invention relates to the use of one or more &agr;-keto carboxylic acid esters and/or aldehyde carboxylic acid esters for stabilizing hydrogen peroxide during enzyme-catalyzed or metal-catalyzed oxidation reactions in organic synthesis, as well as for stabilizing hydrogen peroxide or aqueous or organic hydrogen peroxide solutions during production, storage and transport.
    Type: Grant
    Filed: November 15, 2001
    Date of Patent: January 13, 2004
    Assignee: DSM Fine Chemicals Austria NFG GmbH & Co KG
    Inventor: Paulus Lambertus Alsters
  • Patent number: 6291721
    Abstract: An improved process for the preparation of 2-arylvinyl alkyl ether compounds of the structural formula I In addition, the present invention provides an improved process for the preparation of 1,4-diaryl-2-fluoro-2-butene compounds of the structural formula V
    Type: Grant
    Filed: August 12, 1999
    Date of Patent: September 18, 2001
    Assignee: American Cyanamid Co.
    Inventors: Yulin Hu, David Allen Hunt, Weiguo Liu
  • Patent number: 5892128
    Abstract: Benzoyl peroxide is inactivated temporarily by compressing benzoyl peroxide desensitized by dimethyl phthalate to tablets.
    Type: Grant
    Filed: June 3, 1996
    Date of Patent: April 6, 1999
    Assignee: Koch Marmorit GmbH
    Inventors: Volker Banhardt, Roland Opferkuch
  • Patent number: 5852208
    Abstract: A process of producing compounds containing an acyloxyalkoxy group from an alcohol consists of reacting the alcohol with a formaldehyde donor until a compound of the formula:R--O--CH.sub.2 (OCH.sub.2).sub.X OR (V)is generated, wherein x is between about 1 to about 5 and R is an organic moiety. This product is then reacted with a carboxylic acid anhydride. The resulting product has the formula:R--O--CH.sub.2 O--COR.sup.1wherein R.sup.1 is a C.sub.1 -C.sub.6 alkyl group. The invention further relates to intermediates used in the production of such acyloxyalkoxylated compounds.
    Type: Grant
    Filed: August 30, 1996
    Date of Patent: December 22, 1998
    Assignee: Dixie Chemical Company, Inc.
    Inventor: Joseph C. Rongione
  • Patent number: 5705708
    Abstract: Discoloration of cumene hydroperoxide is reduced or inhibited by adding to the cumene hydroperoxide an effective amount on the order of 30 to 1000 ppm of a stabilizer of the formula R'C(O)OM wherein R' is alkyl, alkenyl, cycloalkyl or aryl containing 1-40 carbon atoms, or the formula R.sub.4 NOH wherein each R is independently alkyl or cycloalkyl containing 1-40 carbon atoms.
    Type: Grant
    Filed: September 23, 1996
    Date of Patent: January 6, 1998
    Assignee: Witco Corporation
    Inventor: Peter Frenkel
  • Patent number: 5654464
    Abstract: Organic peroxide compositions which contain a cyclic .alpha.-diketone compound to retard the rate of decomposition of the peroxide compound are disclosed.
    Type: Grant
    Filed: May 31, 1996
    Date of Patent: August 5, 1997
    Assignee: Witco Corporation
    Inventors: Charles Abma, Peter Frenkel, Lawrence Bock
  • Patent number: 5347055
    Abstract: A flegmatizer, which is an oligomer of styrene or of styrene and at least one comonomer, is admixed with an organic peroxide to reduce the heat- and/or shock-sensitivity of the peroxide. The resulting composition can be employed to polymerize olefinic monomers.
    Type: Grant
    Filed: June 24, 1993
    Date of Patent: September 13, 1994
    Assignee: The Dow Chemical Company
    Inventors: Duane B. Priddy, Mehmet Demirors
  • Patent number: 5312997
    Abstract: The present invention relates to surface-active peroxides which can be employed as emulsifying initiators for the preparation of low-electrolyte polymer dispersions having a low tendency to foam.
    Type: Grant
    Filed: May 4, 1993
    Date of Patent: May 17, 1994
    Assignee: Bayer Aktiengesellschaft
    Inventors: Martin Bohnenpoll, Adolf Schmidt, Heinrich Alberts
  • Patent number: 5276202
    Abstract: A substantially water-free, non-dusting and flowable composition comprising an organic peroxide, a hydrocarbyl phthalate, and at least one phlegmatization agent is provided wherein the phlegmatization agent is selected from the group consisting of a polyester and a glycol-based aliphatic carboxylic acid ester, and mixtures thereof. The composition is prepared by: (1) substantially dissolving the hydrocarbyl phthalate and phlegmatization agent in a solvent to form a plasticizer mixture; (2) substantially dissolving the organic peroxide in the plasticizer mixture to form an organic peroxide-plasticizer mixture; (3) cooling the organic peroxide-plasticizer mixture whereby a crystallized composition is formed; and (4) recovering the crystallized composition.
    Type: Grant
    Filed: February 23, 1993
    Date of Patent: January 4, 1994
    Assignee: Phillips Petroleum Company
    Inventors: Michele S. Ceh, Jim D. Byers
  • Patent number: 5245084
    Abstract: The mixture consists of at least one organic peroxide, at least one hydroquinone derivative of the general formulae I and/or II and/or III ##STR1## wherein R and R.sup.1, which may be identical or different, stand for H or t-alkyl, and X stands, for example, for C.sub.1-18 -alkylene, and a crosslinkage promoter, and permits the crosslinkage of polymers and at the same time extends the scorch time, which must be understood as the processing time.
    Type: Grant
    Filed: October 17, 1991
    Date of Patent: September 14, 1993
    Assignee: Luperox GmbH
    Inventors: Jurgen Groepper, Harald Hofmann
  • Patent number: 5202498
    Abstract: Undesirable color change in freshly manufactured cumene hydroperoxide is inhibited by treatment comprising adding sodium hydroxide in an effective amount up to about 120 ppm and holding the treated cumene hydroperoxide at a temperature of about 50.degree. C. to about 70.degree. C. for 0.5 to two hours; optionally the cumene hydroperoxide so treated in the higher end of this caustic range is further treated with a wiped-film evaporator.
    Type: Grant
    Filed: April 20, 1992
    Date of Patent: April 13, 1993
    Assignee: Aristech Chemical Corporation
    Inventor: Carole L. Elias
  • Patent number: 4783278
    Abstract: In general, inorganic or organic peroxyacids are unstable in the presence of a nonionic surfactant, so that it was not feasible to contemplate storing liquid compositions containing both components. It has now been discovered that storable compositions containing both components can be obtained by the use of particulate potassium-4-sulphoperoxybenzoic acid dispersed in the liquid nonionic surfactant containing phase. Additionally, the compositions can also include a dispersed particulate water-insoluble builder such as zeolite or water-soluble builder such as STPP. It is preferable to include a small amount of a chelating peroxidic stabilizer such as dipicolinic acid or 1,1,1-hydroxyethylidene diphosphonic acid.
    Type: Grant
    Filed: February 4, 1987
    Date of Patent: November 8, 1988
    Assignee: Interox Chemicals Limited
    Inventors: William R. Sanderson, John D. Wharne
  • Patent number: 4734135
    Abstract: An aqueous suspension of a solid organic peroxide is produced by mixing a solid organic peroxide having a difference of at least 5.degree. C. between the melting point and the thermal decomposition temperature thereof with a protective colloid, a surface active agent, and water thereby forming an aqueous emulsion and subsequently cooling this aqueous emulsion.
    Type: Grant
    Filed: September 28, 1983
    Date of Patent: March 29, 1988
    Assignee: Nippon Oil & Fats Co., Ltd.
    Inventors: Nobuyuki Satomi, Kazuo Matsuyama, Takeshi Komai
  • Patent number: 4450302
    Abstract: Disclosed are novel blends of peroxides that have melting points of about 5.degree. C. and lower. The blends consist essentially of (1) t-butyl cumyl peroxide, (2) bis(.alpha.-t-butylperoxyisopropyl)benzene, and (3) dicumyl peroxide.
    Type: Grant
    Filed: August 9, 1982
    Date of Patent: May 22, 1984
    Assignee: Hercules Incorporated
    Inventor: Chester R. Willis
  • Patent number: 4403994
    Abstract: The present invention relates to the provision in solid form of the magnesium salt of certain aromatic, cycloaliphatic or conjugated aliphatic compounds containing a peroxycarboxylic acid group and a carboxylate group, and optionally also an alkyl, carboxylate, sulphonate, nitro, chloro or bromo group, which can be employed as bleaching agents. One especially referred example is magnesium monoperoxyphthalate having the formula: ##STR1## The invention also provides processes for the preparation of the salts, by reaction between a magnesium compound and the organic peroxyacid/carboxylate compound in a solvent from which the salt precipitates, the latter preferably being obtained by reaction between hydrogen peroxide and the corresponding anhydride under controlled reaction conditions of temperature and reagent ratios.
    Type: Grant
    Filed: September 7, 1982
    Date of Patent: September 13, 1983
    Assignee: Interox Chemicals Limited
    Inventor: Geoffrey J. Hignett
  • Patent number: 4401835
    Abstract: A method for the preparation of benzoyl peroxide in crystalline form, which crystals may range in size below 10 microns, comprises forming a first solution of the benzoyl peroxide in a precipitate promoting material, adding the first solution to a second solution comprising an aqueous solution of a dispersant, to precipitate the benzoyl peroxide in the desired crystalline form, and finally recovering the crystalline benzoyl peroxide from the first and second solutions. The precipitate promoting material may be selected from sulfur-containing aliphatic ethers, long-chain aliphatic and araliphatic ethers, ethylene oxide derivatives, and mixtures thereof. The dispersant may be selected from cellulosic derivatives, anionic surfactants, nonionic surfactants, colloidal inorganic materials, and mixtures thereof. The present method may be performed at room temperature and is therefore safe and energy conservative.
    Type: Grant
    Filed: September 17, 1981
    Date of Patent: August 30, 1983
    Assignee: Warner-Lambert Company
    Inventor: Arthur Tarasov
  • Patent number: 4376218
    Abstract: A solid organic peroxide composition comprises from 50% to below 70% by weight of a solid organic peroxide, such as benzoyl peroxide, at least 10% preferably at least 15% of a liquid desensitizer such as a liquid ester of phthalic acid, benzoic acid or phosphoric acid, a silicone oil or a liquid chlorinated hydrocarbon and a solid organophilic compound such as a solid ester of phthalic acid, benzoic acid or phosphoric acid a solid chlorinated hydrocarbon or a salt of a higher fatty acid in, preferably, less than 20% by weight. The compositions are particularly insensitive to impact.
    Type: Grant
    Filed: April 14, 1981
    Date of Patent: March 8, 1983
    Assignee: Interox Chemicals Limited
    Inventors: Keith J. Izzard, Reginald W. Stephenson, Keith C. P. Stanistreet, Iain R. Keeling
  • Patent number: 4299718
    Abstract: A process for preparing peroxidic mixtures, more particularly mixtures of ketone peroxides useful as polymerization initiators for unsaturated polyester resins, is disclosed. The process comprises in situ peroxidation of one or more ketone compounds with hydrogen peroxide, in a solvent which is a ketone peroxide formulation.
    Type: Grant
    Filed: December 28, 1979
    Date of Patent: November 10, 1981
    Assignee: Montedison S.p.A.
    Inventors: Dino Conti, Luigi Minotti, Egeo Sacrini
  • Patent number: 4297298
    Abstract: The invention relates to the preparation of dilute solutions of aliphatic rboxylic peracids.In a first step, a concentrated solution of aliphatic peracid is prepared from the corresponding acid or anhydride and concentrated hydrogen peroxide in the presence of a strong acid catalyst, preferably the minimum quantity necessary for obtaining equilibrium in the system within 48 hours; and in a second step, the concentrated solution of aliphatic peracid is diluted with a solution containing at least one of the reagents, so as to bring the concentration of aliphatic peracid to the rated concentration of the mixture.The method is applicable inter alia to the preparation of stable dilute solutions of peracetic acid.
    Type: Grant
    Filed: July 22, 1980
    Date of Patent: October 27, 1981
    Assignee: L'Air Liquide, Societe Anonyme pour l'Etude Procedes Georges Claude
    Inventors: Francois Crommelynck, Michel Granger, Michel Rio, Jacques Tourdot
  • Patent number: 4287135
    Abstract: Diperoxyalkanedioic acids and aromatic peroxycarboxylic acids are prepared by reacting a dialkanoic acid or an aromatic carboxylic acid with hydrogen peroxide in sulfuric acid and then producing a desensitizing agent for the peracid in situ by adding alkali metal hydroxide, alkali metal aluminate or an alkaline earth metal hydroxide so that the filtrate is free of sulfuric acid. The resulting salt coats the peracid and the product is desensitized and stable in storage.
    Type: Grant
    Filed: October 11, 1979
    Date of Patent: September 1, 1981
    Inventors: Reinhard Stober, Rolf Wirthwein, Christian Hase
  • Patent number: 4255277
    Abstract: A stable and non-separating catalyst paste comprising a diacyl peroxide; a minor proportion of water; a finely divided calcium carbonate in an amount sufficient to prevent the composition from physically separating into its components; the remainder, if any, being a chemically inert plasticizer.
    Type: Grant
    Filed: January 29, 1979
    Date of Patent: March 10, 1981
    Assignee: General Electric Company
    Inventor: Robert W. Smearing
  • Patent number: 4230889
    Abstract: 1,1-dihydroperoxycyclohexane is desensitized by dissolving it in water, an alcohol, an ester or ketoether. The solution can be handled safely. 1,1-dihydroperoxycyclohexane may be used as an initiator in polymerizing ethylenically unsaturated compounds.
    Type: Grant
    Filed: June 30, 1978
    Date of Patent: October 28, 1980
    Assignee: Akzona Incorporated
    Inventors: Hendrik Hansma, Arnold Schroeder
  • Patent number: 4219674
    Abstract: Mixtures active as initiators for radical polymerization reactions comprising(1) from 1 to 99% by weight of a substituted diphenyl ethane; and(2) from 99 to 1% by weight of an organic peroxide,and a process for desensitizing organic peroxides.
    Type: Grant
    Filed: December 13, 1978
    Date of Patent: August 26, 1980
    Assignee: Bayer Aktiengesellschaft
    Inventors: Heinrich Wolfers, Oskar Walter, Hans Rudolph, Hans J. Rosenkranz
  • Patent number: 4134850
    Abstract: The present invention provides bleaching or detergent compositions containing a cycloaliphatic peroxyacid of general formula: ##STR1## WHEREIN O .ltoreq.m .ltoreq.5,O .ltoreq.n .ltoreq.5 andN+m.gtoreq. 1,And mono or diethylenically unsaturated derivatives thereof, and processes for washing/bleaching using such peroxyacids, preferably at a temperature of from 30 to 60.degree. C. The peroxyacids can be generated in situ by hydrolysis or perhydrolysis of the corresponding diacyl peroxide. The peroxyacid and diacyl peroxide can be desensitized by intimate contact with a diluent e.g. lauric acid or magnesium sulphate and coated to reduce destructive interaction with other components of the detergent or bleaching composition.
    Type: Grant
    Filed: May 6, 1976
    Date of Patent: January 16, 1979
    Assignee: Interox Chemicals Limited
    Inventors: Joseph E. McCrudden, Robert E. Talbot
  • Patent number: 4129517
    Abstract: A stable aqueous peroxy-containing concentrate containing by weight of the concentrate 1 to 60 percent of perglutaric acid; 1 to 50 percent of hydrogen peroxide; 0.01 to 2 percent of a stabilizing agent for the perglutaric acid and hydrogen peroxide; and the remainder to 100 percent water.
    Type: Grant
    Filed: November 28, 1977
    Date of Patent: December 12, 1978
    Assignee: Sterling Drug Inc.
    Inventors: Heinz Eggensperger, Wolfgang Beilfuss
  • Patent number: T998005
    Abstract: Provided are stabilized compositions of benzoyl peroxide and a method for their preparation.The compositions comprise benzoyl peroxide and a desensitizer selected from the group consisting of a lower alkyl ester of 3,3-dimethyl-4-pentenoic acid and a lower alkyl ester of 4,6,6,6-tetrachloro-3,3-dimethylhexanoic acid, the desensitizer being present in an amount of at least 0.5 part by weight for each part by weight of benzoyl peroxide.
    Type: Grant
    Filed: March 15, 1979
    Date of Patent: September 2, 1980
    Assignee: FMC Corporation
    Inventors: Edward F. Orwoll, Richard R. Boettcher