Patents Represented by Attorney, Agent or Law Firm Norvell E. Wisdom, Jr.
  • Patent number: 6395336
    Abstract: A resin coating is formed on a metal surface using an aqueous autodepositing resin composition that contains oxidizing agent, acid, and carboxyl-functional and/or hydroxyl-functional water-dispersible or water-soluble resin and, optionally, metal ions; the resulting coating, while still in its uncured condition, is subject to post-treatment with an aqueous solution containing from 0.5 to 5.0 g/L of amine and from 10 to 100 g/L (solids) of water-soluble amino resin molecules that bear at least two alkoxymethylamino, methylolamino, and/or imino groups; and the coating is then dried and cured. This provides a highly anticorrosive coating on the metal, and contrary to an analogous process in which the post-treatment solution contains amino resin but not amine, the post-treatment solution remains stable and provides continuing high quality coating performance even after a considerable amount of metal surface per unit volume of post-treatment solution has been processed.
    Type: Grant
    Filed: July 14, 2000
    Date of Patent: May 28, 2002
    Assignee: Henkel Corporation
    Inventors: Takumi Honda, Mutsumi Yanagi
  • Patent number: 6315823
    Abstract: The corrosion resistance of an article having a surface with a primary inorganic coating, such as a conversion coating, over a metal substrate can be improved by treatment of the primary coating with an aqueous liquid sealing composition comprising lithium cations and vanadate anions. This treatment is particularly advantageous for primary coatings formed on aluminum alloys by treating them with a conversion coating forming aqueous composition made by reacting cobalt(II) cations, acetate ions, hydroxyalkyl amines, and peroxides in aqueous solution.
    Type: Grant
    Filed: November 16, 1999
    Date of Patent: November 13, 2001
    Assignee: Henkel Corporation
    Inventor: Shawn E Dolan
  • Patent number: 6231688
    Abstract: A zinc phosphate-type conversion film having microfine-sized crystals is formed on metal surfaces using a conversion treatment bath that contains zinc ions and phosphate ions along with 50 to 1500 ppm of an organoperoxide conversion accelerator, and optionally surfactant. Surface-conditioning treatments can be omitted from this method.
    Type: Grant
    Filed: June 8, 1998
    Date of Patent: May 15, 2001
    Assignee: Henkel Corporation
    Inventors: Hitoshi Ishii, Yasuhiko Nagashima
  • Patent number: 6231687
    Abstract: A phosphating solution that contains from 3 to 30 g/l of zinc ions, from 0.1 to 20 g/l of ferrous ions, from 5 to 60 g/l of phosphate ions, from 5 to 60 g/l of nitrate ions, and a source of hydroxylamine in a concentration corresponding stoichiometrically to from 0.5 to 4 g/l of hydroxylamine and in which there is a weight ratio of zinc to phosphate that is from 0.1:1 to 1:1 deposits on steel to be cold worked a phosphate conversion coating suitable as a lubricant carrier. This phosphating solution, which may optionally contain one or more of calcium, nickel, cobalt, and copper cations and simple and complex fluorine-containing anions, makes it possible to lower the temperature of the treatment solution, reduce the amount of sludge, improve the quality of the coating film, and allow single-liquid type replenishment to be used. Preferably the surface to be phosphated is immersed in the phosphating solution, maintained at a temperature of 35 to 80° C., for 2 to 20 minutes.
    Type: Grant
    Filed: October 7, 1999
    Date of Patent: May 15, 2001
    Assignee: Henkel Corporation
    Inventors: Naoyuki Kobayashi, Masahiko Kawakami
  • Patent number: 6214132
    Abstract: A pretreatment before phosphating conversion coating is effected by contacting a metal substrate to be coated with a pretreatment composition that has a pH from 4 to 13 and contains dispersed fine particle size alkali metal or ammonium salts and divalent or trivalent metal phosphates. The conditioning achieved is as good as with conventional Jernstedt salts and the pretreatment compositions according to the invention are more storage stable.
    Type: Grant
    Filed: September 3, 1999
    Date of Patent: April 10, 2001
    Assignee: Henkel Corporation
    Inventors: Takaomi Nakayama, Yasuhiko Nagashima, Kensuke Shimoda
  • Patent number: 6211132
    Abstract: An acidic aqueous liquid composition for deburring/degreasing/cleaning metal, in particular aluminum, parts by mass finishing has as its active ingredients: (A) a nonionic surfactant containing halogen atoms, (B) nitrogen based surfactants such as n-alkyl pyrrolidone, builders such as silicates and boric acid, hydrotropes, corrosion inhibitors, and sequestering agents.
    Type: Grant
    Filed: June 14, 1999
    Date of Patent: April 3, 2001
    Assignee: Henkel Corporation
    Inventors: John R Pierce, Lawrence R Carlson, William J Wittke
  • Patent number: 6200693
    Abstract: A chromium-free water-based surface treatment liquid which contains from 0.01 to 50 g/l of a total of dissolved manganic acid, permanganic acid, and salt(s) thereof and from 0.01 to 20 g/l of a total of dissolved titanium compounds and has a pH of from 1.0 to 6.0 reacts rapidly with aluminum and aluminum alloy surfaces to deposit thereon a protective coating that does not contain hexavalent chromium and has excellent corrosion resistance and paint film holding properties.
    Type: Grant
    Filed: November 22, 1999
    Date of Patent: March 13, 2001
    Assignee: Henkel Corporation
    Inventors: Kazuya Nakada, Motoki Kawaguchi, Kazuhiro Maeda
  • Patent number: 6194357
    Abstract: Waterborne lubricants comprising: (A) water-soluble inorganic salt; (B) homogeneously dispersed solid lubricant; (C) at least one homogeneously emulsified substance selected from mineral oils, animal and plant oils and fats, and synthetic oils; (D) surfactant; and (E) water, in which the weight ratio (B)/(A) is from 0.05:1 to 2:1 and the weight ratio {C/(A+B)} is from 0.05:1 to 1:1, provide a one-step, highly lubricating waterborne lubricant for use in the cold plastic working of metals. This waterborne lubricant can replace the conversion coating treatment (phosphate, oxalate, etc.)+reactive soap treatment combined lubrication system now in general use and is free of the environmental issues associated with the combined lubrication system, provides for facile coating removal, and is not subject to the decline in seizure resistance caused by nonuniform add-on when large numbers of workpieces are treated together by immersion.
    Type: Grant
    Filed: December 21, 1998
    Date of Patent: February 27, 2001
    Assignee: Henkel Corporation
    Inventors: Motoharu Murata, Yoshio Matsumura, Yoshihiko Nishizawa, Takashi Koyama
  • Patent number: 6191201
    Abstract: A mixture of two stabilizers, one including benzene rings bearing hydroxyl substituents and the other containing divalent sulfur atoms, is effective in stabilizing tacky polymers that remain solid up to a temperature of at least 160° C. particularly polymers of isobutylene, so that the polymers give long service in the ambient atmosphere as protective layers coated on aluminum substrates and used to line the interiors of paint baking ovens. When accumulated foreign materials accumulate on the coatings, the coating and the accumulated foreign materials can be decomposed to largely volatile products by heating to a temperature substantially higher than the service temperature but not high enough to melt the metal substrate for the coating.
    Type: Grant
    Filed: April 20, 1998
    Date of Patent: February 20, 2001
    Assignee: Henkel Corporation
    Inventors: Chester P. Jarema, Michael A. Stuart
  • Patent number: 6187736
    Abstract: A solvent mixture comprising an alcohol, an aromatic hydrocarbon or an organic compound containing carboxyl but not hydroxyl moieties, and optionally and preferably a non-aromatic hydrocarbon or halohydrocarbon is particularly effective in removing incompletely cured residues of a variety of sealing compounds from the surfaces of automobile bodies, without damaging intermediate or final finish coatings for the automobile bodies. The solvent mixture may advantageously be absorbed in a wiping cloth for convenient use.
    Type: Grant
    Filed: March 11, 1999
    Date of Patent: February 13, 2001
    Assignee: Henkel Corporation
    Inventor: Chester P. Jarema
  • Patent number: 6179934
    Abstract: An aqueous zinc phosphate conversion coating that contains 5 to 50 g/L of phosphate ions, 0.2 to 10 g/L of zinc ions, and 0.5 to 4.0 g/L as hydroxylamine of a hydroxylamine source, and also: (1) contains 0.01 to 5.0 g/L polycarboxylic acid or salt thereof and/or starch phosphate; or (2) has a zinc ions/phosphate ions weight ratio below 0.27 and a zinc ions concentration of at least 2.0 g/L forms high quality zinc phosphating coatings on metal surfaces even if the surfaces have not been previously conditioned by contact with a dispersion of colloidal titanium.
    Type: Grant
    Filed: July 22, 1999
    Date of Patent: January 30, 2001
    Assignee: Henkel Corporation
    Inventors: Masahiko Kawakami, Naoyuki Kobayashi, Kazuyuki Oyama
  • Patent number: 6149735
    Abstract: A chromate treatment bath composition, afforded by the introduction, into an aqueous solution containing hexavalent Cr ions and trivalent Cr ions, of a nonionic-anionic composite surfactant that has an anionic moiety and a nonionic moiety composed of a polyethylene glycol group or a group consiting of an ethylene oxide addition polymer, provides metal surfaces onto which a layer of the composition containing 5 to 150 mg/m.sup.2 of total chromium is dried with a chromate film that has an excellent alkali resistance and water resistance, a high chromium fixing ratio, an excellent corrosion resistance, and an excellent paint film adherence.
    Type: Grant
    Filed: June 1, 1998
    Date of Patent: November 21, 2000
    Assignee: Henkel Corporation
    Inventors: Takashi Oue, Kensuke Mizuno
  • Patent number: 6143365
    Abstract: The susceptibility to heat degradation of an autodeposited coating in which the principal organic constituents are copolymers of vinylidene chloride in which vinylidene chloride residues constitute at least half the weight of the total binder phase in the autodeposited coating is improved if the wet autodeposited coatings are rinsed, before being later dried and cured, with a water-based liquid rinse that comprises dissolved phosphate ions in a concentration that corresponds stoichiometrically to at least 0.5 g/l of tripolyphosphate ions. The water-based liquid rinse preferably has a strongly alkaline pH and also comprises dissolved organic molecules that are effective chelating agents for dissolved iron cations by reason of having in each molecule at least two carboxyl, carboxylate, and/or other hydroxy moieties.
    Type: Grant
    Filed: June 3, 1999
    Date of Patent: November 7, 2000
    Assignee: Henkel Corporation
    Inventor: Bashir M. Ahmed
  • Patent number: 6090224
    Abstract: A process for phosphating metal surfaces in which a nitrite- and nickel-free zinc-containing phosphating solution is applied to the metal surfaces which, if desired, are then rinsed and subsequently after-rinsed with an aqueous solution with a pH value of 3 to 7 which contains 0.001 to 10 g/l of one or more of the cations of Li, Cu and Ag.
    Type: Grant
    Filed: September 29, 1997
    Date of Patent: July 18, 2000
    Assignee: Henkel Kommanditgesellschaft auf Aktien
    Inventors: Winfried Wichelhaus, Helmut Endres, Karl-Heinz Gottwald, Horst-Dieter Speckmann, Jan-Willem Brouwer
  • Patent number: 6071435
    Abstract: To inhibit the blackening of zinciferous metal-plated steel sheet while also generating a good corrosion resistance, fingerprint resistance, and chromium fixation ratio for the steel sheet, it is coated with an aqueous liquid composition that has a pH not exceeding 2.5 and contains hexavalent chromium ion, trivalent chromium ion, nickel ion, inorganic acid (preferably phosphoric acid), and film-forming resin, with a weight ratio between the nickel content and the total chromium content of 0.05 to 1, and the liquid coating is dried onto the treated metalsurface to form a blackening resistant coating that contains from 0.1 to 10 g/m.sup.2 resin and from 2 to 150 mg/m.sup.2 of total chromium.
    Type: Grant
    Filed: December 22, 1995
    Date of Patent: June 6, 2000
    Assignee: Henkel Corporation
    Inventors: Shinobu Komiyama, Kyosuke Hori, Kenji Aizawa
  • Patent number: 6068710
    Abstract: Aqueous liquid treatment compositions comprising as active ingredients boric acid and condensed phosphate ions can form iron phosphate containing conversion coatings on ferriferous substrates at rates of at least 0.3 g/m.sup.2 /min. The coatings are useful as cold working lubricants, either as such or after overcoating with a supplemental lubricant.
    Type: Grant
    Filed: May 27, 1999
    Date of Patent: May 30, 2000
    Assignee: Henkel Corporation
    Inventor: Kenneth J. Hacias
  • Patent number: 6059896
    Abstract: A surface of aluminiferous metal is brought into contact at 25 to 65.degree. C. for 2 to 100 seconds with a surface treatment bath with a pH of 1.0 to 6.0 that contains phosphate ions, dissolved titanium and/or zirconium compounds, dissolved fluorine-containing anions, and a water soluble polymer in the following weight proportions: 1-100:1-50:1-200:1-200. This is followed by a water rinse and drying. The water soluble polymer has a chemical structure conforming to formula (I), in which each of X.sup.1 and X.sub.2 represents a hydrogen atom, a C.sub.1 to C.sub.5 alkyl group, or a C.sub.1 to C.sub.5 hydroxyalkyl group; each of Y.sup.1 and Y.sup.2 represents a hydrogen atom or a moiety "Z" that to formula (II) or (III), wherein each of R.sup.1, R.sup.2, R.sup.3, R.sup.4, and R.sup.5 represents a C.sub.1 to C.sub.10 alkyl group or a C.sub.1 to C.sub.10 hydroxyalkyl group; the average value for the number of Z moieties substituted on each aromatic ring in the polymer molecules is from 0.2 to 1.
    Type: Grant
    Filed: January 21, 1998
    Date of Patent: May 9, 2000
    Assignee: Henkel Corporation
    Inventors: Ryoji Ehara, Masahiro Motozawa, Tomoyuki Aoki
  • Patent number: 6060122
    Abstract: The invention concerns an aqueous corrosion-protective cleaning solution for tin-plated steel, in particular for tin-plated steel cans, the solution containing complex fluorides of the elements boron, titanium, zirconium, and hafnium; non-ionic surfactants; and corrosion inhibitors and having a pH within the range from 3 to 6. The invention also concerns an aqueous concentrate for preparing the solution by dilution with water and a method of cleaning tin-plated cans using the solution.
    Type: Grant
    Filed: September 24, 1997
    Date of Patent: May 9, 2000
    Assignee: Henkel Kommanditgesellschaft aut Aktien
    Inventor: Henry Rossmaier
  • Patent number: H2014
    Abstract: Excellent adhesion of vitreous enamel to steel can be achieved via an intermediate layer formed on the steel by bringing it into contact with a liquid composition that contains water and a component of solute selected from the group consisting of dissolved silicates and dissolved borates and, optionally, surfactant. The modification of the steel surface achieved by treating it with silicates and/or borates is also effective for improving the adhesion of steel to other protective type coatings such as paint.
    Type: Grant
    Filed: April 20, 2000
    Date of Patent: February 5, 2002
    Assignee: Henkel Corporation
    Inventors: Mervet S. Boulos, Bruce F. Caswell
  • Patent number: H2077
    Abstract: Dispersions in water of “poly{vinyl alcohol}” (“PVA”), preferably those types resulting from about 90 mole % hydrolysis and/or ester interchange of polymers of vinyl carboxylates and having a molecular weight of about 155,000, are particularly effective for modifying the surfaces of plastic materials to cause water and/or other specified liquids to spread more readily over the treated surfaces than over the untreated surfaces. A biocide to repress the growth of micro-organisms in the dispersions is preferred.
    Type: Grant
    Filed: August 11, 2000
    Date of Patent: August 5, 2003
    Assignee: Henkel Corporation
    Inventor: Walter N. Opdycke