Patents Represented by Attorney, Agent or Law Firm Norvell E. Wisdom, Jr.
  • Patent number: 5442081
    Abstract: Process for the production of oligomeric fatty acids and lower alkyl esters thereof in which fatty acids containing 16 to 24 carbon atoms and 2, 3, 4 or 5 double bonds and/or lower alkyl esters thereof are oligomerized with C.sub.1-4 alcohols at an elevated temperature in the presence of a tin halide catalyst, optionally in combination with a halide of titanium, iron, cobalt, nickel, lead, and/or germanium.
    Type: Grant
    Filed: October 4, 1993
    Date of Patent: August 15, 1995
    Assignee: Henkel Kommanditgesellschaft auf Aktien
    Inventors: Arno Behr, Hans-Peter Handwerk
  • Patent number: 5427632
    Abstract: A chromium free conversion coating at least equivalent in corrosion protective quality to conventional chromate conversion coatings can be formed on metals, particularly cold rolled steel, by a dry-in-place aqueous acidic liquid comprising:(A) a component of anions, each of said anions consisting of (i) at least four fluorine atoms and (ii) at least one atom of an element selected from the group consisting of titanium, zirconium, hafnium, silicon, and boron, and, optionally, (iii) ionizable hydrogen atoms, and, optionally, (iv) one or more oxygen atoms;(B) a component of cations of elements selected from the group consisting of cobalt, magnesium, manganese, zinc, nickel, tin, zirconium, iron, and copper; the ratio of the total number of cations of this component to the total number of anions of component (A) being at least 1:5;(C) sufficient free acid to give the composition a pH in the range from 0.5 to 5.
    Type: Grant
    Filed: July 30, 1993
    Date of Patent: June 27, 1995
    Assignee: Henkel Corporation
    Inventor: Shawn E. Dolan
  • Patent number: 5427863
    Abstract: The corrosion resistance, and also often the heat resistance, of a autodeposited coating in which the organic binders are predominantly copolymers of vinylidene chloride containing at least 50% vinylidene chloride can be improved by including another type of organic resin binder in the autodeposition bath in sufficient amount to constitute at least 2 up to as much as about 40% of the total of the PVDC and the other organic resin binder. Results can be further improved by rinsing the uncured autodeposited coating with an aqueous treatment solution that has a pH between 7 and 11 and contains between 0.01 and 5% of anions derived from multifunctional organic acids, preferably anions of 1-hydroxyethylidene-1,1-diphosphonic acid, citric acid, tartaric acid, and/or oxalic acid before drying the coating.
    Type: Grant
    Filed: September 23, 1992
    Date of Patent: June 27, 1995
    Assignee: Henkel Corporation
    Inventor: Elizabeth J. Siebert
  • Patent number: 5421907
    Abstract: 2-Ethylhexyl esters of fatty acids, optionally mixed with emulsifiers, solubilizers, corrosion inhibitors, and/or water, are useful as low viscosity agents for the cold cleaning of metal surfaces contaminated mainly with oil. Such agents are non-toxic when inhaled and completely biodegradable.
    Type: Grant
    Filed: November 19, 1993
    Date of Patent: June 6, 1995
    Assignee: Henkel Kommanditgesellschaft auf Aktien
    Inventors: Claus Nieendick, Karl Schmid, Heinz Mueller, Claus-Peter Herold
  • Patent number: 5417951
    Abstract: The invention is a process for the hydrothermal production of crystalline sodium disilicate by heating an aqueous mixture of quartz sand and sodium hydroxide or an aqueous solution of sodium disilicate with a solids content of at least 50% by weight or more than 75% by weight at a temperature above 235.degree. C. and under autogenous pressure to form crystalline sodium disilicate.
    Type: Grant
    Filed: June 1, 1993
    Date of Patent: May 23, 1995
    Assignee: Henkel Kommanditgesellschaft auf Aktien
    Inventor: Guenther Just
  • Patent number: 5409685
    Abstract: A manufactured stannous sulfate granulate is suitable for electrolytically coloring anodized aluminum with metallic salts, where the granulate particles have a linear extension from 0.1 to 10 mm. Also disclosed are a process for manufacturing the same and using it for electrolytically coloring anodized aluminum with metallic salts. The manufactured stannous sulfate granulate is characterized by technical advantages, such as storage stability, easy dispensibility, and absence of dust, compared to conventionally used stannous sulfate powders.
    Type: Grant
    Filed: December 20, 1993
    Date of Patent: April 25, 1995
    Assignee: Henkel Kommanditgesellschaft auf Aktien
    Inventors: Loert de Riese-Meyer, Hans-Josef Beaujean, Jens Bode, Joerg Sander, Volker Sander
  • Patent number: 5409737
    Abstract: The use of chelating type cation exchange resins, particularly those with iminodiacetic acid functionality, to remove dissolved multivalent cations such as iron, zinc, and chromium from used autodeposition compositions permits reuse of the autodeposition compositions without the need for added surfactant and without developing any undesirable graininess or other texture in the coatings formed. The cation exchange resins can be efficiently regenerated with 0.5 to 4% by weight aqueous hydrofluoric acid.
    Type: Grant
    Filed: August 5, 1993
    Date of Patent: April 25, 1995
    Assignee: Henkel Corporation
    Inventors: William G. Kozak, Bashir M. Ahmed
  • Patent number: 5409592
    Abstract: The invention describes a novel electrolyte additive for a sulfuric acid tin(II) containing colorant bath for the alternating current coloring of anodized aluminum surfaces, consisting of a synergistic mixture of at least one antioxidant of one of the general formulas (I to IV) and at least one throwing power improver of general formula (V), and to a process for the alternating current coloration of anodized aluminum surfaces using the electrolyte additive of the invention.
    Type: Grant
    Filed: April 29, 1993
    Date of Patent: April 25, 1995
    Assignee: Henkel Kommanditgesellschaft auf Aktien
    Inventors: Loert D. Meyer, Volker Sander, Juergen Lindener
  • Patent number: 5401337
    Abstract: Seal coating compositions and methods of applying them to metallic surfaces, particularly aluminum or alloys thereof, beating a previously formed protective coating, particularly a conversion coating, such as a chromate or phosphate coating or a chrome-free metal oxide conversion coating, or a coating formed by anodization, provide improved corrosion resistance beyond that provided by the previously formed protective coating. The seal coating compositions preferably contain at least one of benzotriazole, nickel and/or cobalt cations and borates, or aminated polymers of vinyl styrene.
    Type: Grant
    Filed: November 1, 1993
    Date of Patent: March 28, 1995
    Assignee: Henkel Corporation
    Inventors: Lawrence R. Carlson, Philip M. Johnson, John R. Pierce
  • Patent number: 5401381
    Abstract: A process is disclosed for phosphating metallic surfaces, particularly electrolytically or hot dipped galvanized steel strip surfaces, by dip or spray processing the metallic surfaces with acidic aqueous phosphating solutions, wherein the workpieces are cathodically treated at the same time with a direct current. The process is characterized by (a) the use of phosphating solutions that contain the following components: Zn.sup.+2 cations in a range from 0.1 to 5 g/l; PO.sub.4.sup.-3 anions in a range from 5 to 50 g/l; NO.sub.3.sup.- anions in a range from 0.1 to 50 g/l; as well as Ni.sup.+2 cations in a range from 0.1 to 5 g/l and/or Co.sup.+2 cations in a range from 0.1 to 5 g/l; (b) the observance of the following conditions: pH value of the phosphating solutions in a range from 1.5 to 4.5; temperature of the phosphating solutions in a range from 10.degree. to 80.degree. C.
    Type: Grant
    Filed: October 6, 1993
    Date of Patent: March 28, 1995
    Assignee: Henkel Kommanditgesellschaft auf Aktien
    Inventors: Reinhard Seidel, Horst-Dieter Speckmann, Karl-Dieter Brands, Gerard Veldman, Raschad Mady
  • Patent number: 5399749
    Abstract: Zeolites, particularly X type zeolites, essentially irrespective of the cation they contain, are effective heterogeneous catalysts for the oxidative conversion of the products of reaction of organic molecules containing a --HC.dbd.CH-- structure with ozone to at least two carboxylic acid molecules, with gaseous diatomic oxygen as the oxidative agent. The process is particularly well adapted to converting oleic acid into a mixture of azelaic and pelargonic acids.
    Type: Grant
    Filed: September 9, 1991
    Date of Patent: March 21, 1995
    Assignee: Henkel Corporation
    Inventor: Louis Rebrovic
  • Patent number: 5399209
    Abstract: A chromate conversion coating with excellent cold workability and protection against corrosion after subsequent painting can be formed on metal surfaces, particularly on galvanized steel sheet, by drying in place on the metal an amount of an acidic aqueous composition comprising (A) from 4.0 to 51.0 g/L of hexavalent chromium; (B) from 6.0 to 38.0 g/L of trivalent chromium; (C) from 0.5 to 97.0 g/L of phosphate ions; (D) a component selected from the group consisting of sulfate ions, nitrate ions, fluoride ions, and mixtures thereof; and (E) a component selected from the group consisting of cations of Cu, Co, Ni, Sn, Fe, and Pb and mixtures thereof, wherein the trivalent chromium/hexavalent chromium weight ratio is in the range from 0.2 to 1.4. Preferably the amount of aqueous composition used is such as to produce a chromium add-on of from 20-160 mg/m.sup.2.
    Type: Grant
    Filed: March 1, 1993
    Date of Patent: March 21, 1995
    Assignee: Henkel Corporation
    Inventors: Arata Suda, Takao Ogina
  • Patent number: 5397844
    Abstract: Polyacrylates and their use for powder coatings are disclosed. In order to prepare the polyacrylates, acrylic acid, methacrylic acid, their esters with C.sub.1 -C.sub.4 alcohols, and/or fumaric acid, maleic acid, and their anhydrides are first polymerized. The polymers are then reacted with long chain alcohols, one alcohol having an aliphatic chain with 6 to 36 carbon atoms and a second alcohol having a cyclic amide structure. This polyacrylate is suitable as a levelling agent for powder coatings, in particular for powder lacquers. It improves the flowing behavior by reducing the orange peel effect and improves flowability.
    Type: Grant
    Filed: February 7, 1994
    Date of Patent: March 14, 1995
    Assignee: Henkel Kommanditgesellschaft auf Aktien
    Inventors: Herbert Fischer, Wolfgang Gress, Doris Oberkobusch
  • Patent number: 5395655
    Abstract: A chromating treatment composition particularly suitable for preparing aluminum and stainless steel for clear coating comprises water, anions containing hexavalent chromium, trivalent chromium cations, phosphate ions, dry process finely divided silica, and acrylic and/or methacrylic acid polymer or copolymer in such amounts that:(A) the concentration of the total of hexavalent and trivalent chromium atoms is in the range from 1 to 60 g/L;(B) the (trivalent chromium atom)/(hexavalent chromium atom) weight ratio is in the range from 0.6 to 2.5;(C) the (phosphate ion)/(total chromium atoms in hexavalent chromium ions and trivalent chromium ions) weight ratio is in the range from 0.5 to 4.5;(D) the (dry process silica)/(total chromium atoms in hexavalent chromium ions and trivalent chromium ions) weight ratio is in the range from 0.1 to 5.
    Type: Grant
    Filed: August 27, 1993
    Date of Patent: March 7, 1995
    Assignee: Henkel Corporation
    Inventors: Oyama Kazuyuki, Norifumi Hatano, Akihiko Hasebe
  • Patent number: 5393447
    Abstract: A chromium and ferricyanide free aqueous deoxidizer/desmutter for aluminum and magnesium alloys contains nitric acid, ferric ions, persulfate, and molybdate and preferably also sulfate, fluoride, and ethoxylated acetylenic diol surfactant.
    Type: Grant
    Filed: July 9, 1993
    Date of Patent: February 28, 1995
    Assignee: Henkel Corporation
    Inventors: Lawrence R. Carlson, Philip M. Johnson
  • Patent number: 5391240
    Abstract: The invention concerns a process for a passivating post-treatment of phosphated metal surfaces of iron, steel, galvanized steel, zinc, aluminum, and their alloys, in which the phosphated metal surfaces are brought into contact at temperatures in the range from 10.degree. to 60.degree. C. with chromium-free, acidic, silicate-containing aqueous solutions having a pH in the range of 2 to 5 and 0.5 to 50 g/l of SiO.sub.2 and 0.5 to 100 g/l of an acid.
    Type: Grant
    Filed: April 8, 1993
    Date of Patent: February 21, 1995
    Assignee: Henkel Kommanditgesellschaft auf Aktien
    Inventors: Reinhard Seidel, Karl-Dieter Brands, Karl-Heinz Gottwald
  • Patent number: 5391234
    Abstract: A composition and method for stripping protective coatings from surfaces, particularly metal surfaces such as aluminum, without blemishing the metal surface comprises a silicate-containing, alkaline component and a product of chemical interaction in solution between silicate and acid other than silicic acid in an amount to inhibit attack of the substrate being cleaned or to which the coating was applied. Preferably the acid reacted with the silicate is gluconic, or most preferably, boric acid.
    Type: Grant
    Filed: October 22, 1992
    Date of Patent: February 21, 1995
    Assignee: Henkel Corporation
    Inventor: Donald P. Murphy
  • Patent number: 5391239
    Abstract: Conversion coatings containing elpasolite and/or cryolite can be formed on aluminum substrates by contacting the substrates with an aqueous liquid composition containing adequate free fluoride ion activity and concentrations of dissolved sodium and potassium, if a potassium content in the coating is desired as is usual. The aqueous liquids preferably also contain phosphate and polyhydroxy organic compounds and may contain surfactants if a cleaning effect is desired.
    Type: Grant
    Filed: November 1, 1993
    Date of Patent: February 21, 1995
    Assignee: Henkel Corporation
    Inventor: Mervet S. Boulos
  • Patent number: 5389113
    Abstract: Mixtures containinga) 58 to 95% by weight of at least one ester with an iodine value of 50 to 150 derived from fatty acids containing 12 to 22 carbon atoms and lower aliphatic alcohols containing 1 to 4 carbon atoms,b) 4 to 40% by weight of at least one ester of fatty acids containing 6 to 14 carbon atoms and lower aliphatic alcohols containing 1 to 4 carbon atoms andc) 0.1 to 2% by weight of at least one polymeric ester, are distinguished by particular low-temperature stability and can be used as a fuel for diesel engines.
    Type: Grant
    Filed: August 17, 1993
    Date of Patent: February 14, 1995
    Assignee: Henkel Kommanditgesellschaft auf Aktien
    Inventors: Guenther Demmering, Karl Schmid, Frank Bongardt, Leonhard Wittich
  • Patent number: 5389199
    Abstract: A lubricant and surface conditioner for formed metal surfaces, particularly beverage containers, reduces the coefficient of static friction of said metal surfaces and enables drying said metal surfaces at a lower temperature. The conditioner includes a water-soluble organic material selected from a phosphate ester, alcohol, fatty acid including mono-, di-, tri-, and polyacids; fatty acid derivatives such as salts, hydroxy acids, amides, esters, ethers and derivatives thereof; and mixtures thereof.
    Type: Grant
    Filed: September 23, 1993
    Date of Patent: February 14, 1995
    Assignee: Henkel Corporation
    Inventors: Sami B. Awad, Timm L. Kelly, Gary L. Rochfort