With Preservative Or Stabilizer Patents (Class 549/201)
  • Patent number: 8512520
    Abstract: A paper size which comprises a stable aqueous dispersion of a reactive size, from 5 to 100% by weight, based on the reactive size, of a substantially linear nitrogen-comprising polymer having at least 3 mmol/g of basic nitrogen atoms, and from 1 to 50% by weight of cationic starch having a degree of substitution of at least 0.05 is described. The paper size has a good sizing effect and a stable viscosity.
    Type: Grant
    Filed: November 29, 2005
    Date of Patent: August 20, 2013
    Assignee: BASF Aktiengesellschaft
    Inventors: Markus Schmid, Roland Ettl, Klaus Lorenz, Rainer Dyllick-Brenzinger, Andreas Brockmeyer
  • Publication number: 20120087984
    Abstract: Methods for stabilizing chemical compounds, particularly pharmaceutical agents, using nanoparticulate compositions are described. The nanoparticulate compositions comprise a chemical compound, such as a pharmaceutical agent, and at least one surface stabilizer. The component chemical compound exhibits chemical stability, even following prolonged storage, repeated freezing-thawing cycles, exposure to elevated temperatures, or exposure to non-physiological pH conditions.
    Type: Application
    Filed: October 3, 2011
    Publication date: April 12, 2012
    Inventors: Elaine LIVERSIDGE, Linden Wei
  • Patent number: 7365113
    Abstract: Flavan-based and spirodichroman compound-based phosphate esters prepared by reacting flavans and spirodichroman compounds with phosphorus oxychloride, monophenyl dichlorophosphate, or diphenyl chlorophosphate compounds are described. The flavans and spirodichroman compounds can be synthesized by the reaction of resorcinol with aliphatic acetone. Such phosphate esters can be used as flame retardants.
    Type: Grant
    Filed: September 21, 2005
    Date of Patent: April 29, 2008
    Inventors: Raj B. Durairaj, Gary A. Jesionowski
  • Patent number: 6858730
    Abstract: A method for purifying melamine comprising impurities like ureido-melamine, oxotriazines, melam, melem, comprises the step of putting into contact at a temperature comprised between 340° C. and 410° C. and at a pressure comprised between 8 and 17 MPa a melamine melt with a bed of a catalyst thus obtaininig melamine with a purity of at least 99%.
    Type: Grant
    Filed: September 6, 2001
    Date of Patent: February 22, 2005
    Assignee: Casale Chemicals S.A.
    Inventor: Willi Ripperger
  • Patent number: 6713042
    Abstract: The invention relates to the use of ascorbic acid analogs as buffering reagents and chelating agents for the preparation of metalloradiopharmaceuticals. Also, invention relates to the use of ascorbic acid as a buffering reagent, a chelating agent, and a stabilizer for the preparation and stabilization of radiopharmaceuticals and processes for making and using the same.
    Type: Grant
    Filed: February 22, 2002
    Date of Patent: March 30, 2004
    Assignee: Bristol-Myers Squibb Pharma Company
    Inventor: Shuang Liu
  • Patent number: 6583174
    Abstract: Disclosed is a novel composition comprising a novel bi-cyclic compound, which is expected to be pharmaceutically active, and a glyceride. The stability of the bi-cyclic compound can be improved significantly by dissolving the same in a glyceride.
    Type: Grant
    Filed: October 16, 2000
    Date of Patent: June 24, 2003
    Assignee: Sucampo, A.G.
    Inventors: Ryuji Ueno, Tsuyoshi Habe
  • Patent number: 6518339
    Abstract: An additive that is used in conjunction with certain dibenzylidene sorbitol-type (DBS) clarifiers and acid scavengers within polyolefin resins to reduce the release of aldehydes from polypropylene material is disclosed. Hydrazides have been shown to be effective at removing residual aldehyde from polyolefins, such as polypropylene. This function can be accomplished with a minimal impact on optical transparent properties imparted to the polypropylene by the clarifying agent. The net effect is an improvement in the organoleptic performance of resins containing clarifiers, and a reduction in the UV-absorbing extractables. Particularly, adipic dihydrazide, when co-compounded into polypropylene homopolymer with 4-methyl DBS, improves the organoleptic performance of the clarifier. Incorporation of dihydrazides into polypropylene pellets reduced air-released aldehyde by nearly 100%.
    Type: Grant
    Filed: September 18, 2000
    Date of Patent: February 11, 2003
    Assignee: Milliken & Company
    Inventors: Shawn R. Sheppard, John G. Lever
  • Patent number: 6403811
    Abstract: A process for recovering a concentrate of chromans from a distillate containing chromans is provided comprising the steps of: (1) forming chroman phosphates in the distillate; (2) subjecting the distillate to shearing forces, in the presence of a gas of flotation to form a froth; and (3) recovering the froth containing the concentrate of chroman phosphates.
    Type: Grant
    Filed: July 25, 2001
    Date of Patent: June 11, 2002
    Assignee: Swig Pty Ltd
    Inventor: Simon Michael West
  • Publication number: 20020035055
    Abstract: The present invention provides a fragrance precursor of formula I: 1
    Type: Application
    Filed: June 18, 2001
    Publication date: March 21, 2002
    Inventors: Markus Gautschi, Caroline Plessis, Samuel Derrer
  • Patent number: 5852159
    Abstract: The present invention relates to plastics comprising a high molecular weight, sterically hindered amine, wherein the sterically hindered amine is at least one amine from the group consisting ofI: oligomerized 2,2,4,4-tetramethyl-20(oxiranylmethyl)-7-oxa-3,20-diazadispiro?!he neicosan-21-one,II: condensation product of 2-chloro-4,6-di(4-n-butylamino-1,2,2,6,6-pentamethylpiperidyl)-1,3,5-triaz ine and 1,2-bis(3-aminopropylamino)ethane, andIII: condensation product of 1-hydroxyethyl-2,2,6,6-tetramethyl-4-hydroxypiperidine and succinic acid.These plastics exhibit a reduced rate of uptake of sulfur compounds.The invention further relates to shaped articles made from these plastics.
    Type: Grant
    Filed: May 10, 1996
    Date of Patent: December 22, 1998
    Assignee: Hoechst Aktiengesellschaft
    Inventors: Matthias Zah, Gerhard Pfahler, Karl Gaa, Klaus Keck-Antoine
  • Patent number: 5831102
    Abstract: Enzymatically cleavable chemiluminescent 1,2-dioxetane compounds capable of producing light energy when decomposed, substantially stable at room temperature before a bond by which an enzymatically cleavable labile substituent thereof is intentionally cleaved, are disclosed. These compounds can be represented by the formula: ##STR1## wherein: X and X.sup.1 each represent, individually, hydrogen, a hydroxyl group, a halo substituent, an unsubstituted lower alkyl group, a hydroxy (lower) alkyl group, a halo (lower) alkyl group, a phenyl group, a halophenyl group, an alkoxyphenyl group, a hydroxyalkoxy group, a cyano group or an amide group, with at least one of X and X.sup.1 being other than hydrogen; andR.sub.1 and R.sub.2, individually or together, represent an organic substituent that does not interfere with the production of light when the dioxetane compound is enzymatically cleaved and that satisfies the valence of the dioxetane compound's 4-carbon atom, with the provisos that if R.sup.1 and R.sub.
    Type: Grant
    Filed: February 8, 1996
    Date of Patent: November 3, 1998
  • Patent number: 5260310
    Abstract: Novel compounds of the formula ##STR1## wherein Q, R.sup.1 and R.sup.2 are described herein, are disclosed along with pharmaceutical compositions, methods of use, and process for producing compounds of formula I which starts from the corresponding .beta.-hydroxycarboxylic acids.
    Type: Grant
    Filed: August 12, 1992
    Date of Patent: November 9, 1993
    Assignee: Hoffmann-La Roche Inc.
    Inventors: Romano Derungs, Hans P. Marki, Henri Stalder, Andre Szente
  • Patent number: 5241080
    Abstract: A process for stabilizing dibenzylidenesorbitols comprising incorporating 0.05-20 pts. wt. sorbic acid and/or potassium sorbate in 100 pts. wt. dibenzylidenesorbitol represented by the following formula, ##STR1## and a stabilized dibenzylidenesorbitol composition formed thereby. The storage stability of dibenzylidenesorbitols is thus greatly improved.
    Type: Grant
    Filed: June 25, 1992
    Date of Patent: August 31, 1993
    Assignee: Mitsui Toatsu Chemicals, Inc.
    Inventors: Tadashi Kobayashi, Hiroaki Matsuno, Shoji Obuchi
  • Patent number: 5026875
    Abstract: Disclosed is a composition comprising 1,3,5-trioxane, and more particularly a stability-improved trioxane composition.
    Type: Grant
    Filed: April 27, 1989
    Date of Patent: June 25, 1991
    Assignee: Mitsubishi Gas Chemical Company, Inc.
    Inventors: Mutsuhiko Takeda, Minoru Kakuda, Masafumi Shimpo, Kiyoshi Yoshida
  • Patent number: 4814428
    Abstract: The thermal stability of cyclic carbonate oligomers may be increased by treating a solution of the oligomers with an effective amount of a hydrogen halide.
    Type: Grant
    Filed: June 4, 1987
    Date of Patent: March 21, 1989
    Assignee: General Electric Company
    Inventors: Luca P. Fontana, Thomas G. Shannon
  • Patent number: 4448977
    Abstract: A storage stable composition of glutaraldehyde acetals and an organic acidic catalyst, which can be converted to glutaraldehyde at the site and upon demand, by the addition of water.
    Type: Grant
    Filed: August 26, 1982
    Date of Patent: May 15, 1984
    Assignee: Union Carbide Corporation
    Inventors: Glenn H. Warner, Louis F. Theiling, Jr., Marvin G. Freid
  • Patent number: 4377712
    Abstract: A process for the preparation of meta-substituted diaryl ethers comprises reacting an ortho-haloaryl compound with a phenol compound in a non-aqueous medium in the presence of an alkaline metal base. In a specific embodiment m-phenoxytoluene is prepared by reacting orthochlorotoluene with phenol in the presence of an alkaline metal hydroxide in a substantially non-aqueous liquid medium.
    Type: Grant
    Filed: February 23, 1981
    Date of Patent: March 22, 1983
    Assignee: Occidental Chemical Corporation
    Inventors: Arthur M. Foster, James J. Maul