And Separate Crosslinking Or Curing Agent Patents (Class 204/504)
  • Patent number: 9624383
    Abstract: Disclosed are coating compositions, such as primer compositions, suitable for providing corrosion protection to metal substrates, as well as related coated articles and methods.
    Type: Grant
    Filed: April 24, 2014
    Date of Patent: April 18, 2017
    Assignee: PPG Industries Ohio, Inc.
    Inventors: Matthew S. Scott, Richard F. Syput, Steven R. Zawacky
  • Patent number: 8702943
    Abstract: An aqueous electrodeposition coating composition comprising a cathodically electrodepositable binder, the binder comprising a phosphorylated resin and a carboxyl group separated by from 2 to 4 carbons from an ester group, provides corrosion protection equivalent to that obtained by the conventional phosphate pretreatment-electrodeposition coating process.
    Type: Grant
    Filed: December 29, 2008
    Date of Patent: April 22, 2014
    Assignee: BASF Coatings GmbH
    Inventors: Timothy S December, Abdellatif Chouai, Cynthia A Stants
  • Patent number: 8574414
    Abstract: A method includes (a) contacting at least a portion of a substrate material with a solution comprising a source of copper, wherein the solution is essentially free of a source of a group IIIB metal and a source of a group IVB metal; and (b) after step (a), contacting at least a portion of the substrate with an electrodepositable coating composition comprising (i) a film-forming resin and (ii) a source of yttrium.
    Type: Grant
    Filed: July 14, 2010
    Date of Patent: November 5, 2013
    Assignee: PPG Industries Ohio, Inc
    Inventors: Terri Ziegler, Mark McMillen
  • Publication number: 20130150485
    Abstract: Disclosed herein are functionalized polymers comprising ethylene and substituted ethylene segments, which have been modified by epoxidation to enhance their crosslinking ability. These functionalized polymers are useful as film forming resins in cathodic electrocoating compositions. Also disclosed herein are aqueous dispersion compositions comprising the functionalized polymers and a process for coating various electrically conductive substrates.
    Type: Application
    Filed: December 12, 2011
    Publication date: June 13, 2013
    Applicant: E.I. DU PONT DE NEMOURS AND COMPANY
    Inventors: Simona PERCEC, Susan H. Tilford
  • Patent number: 8062760
    Abstract: An electrodeposition coating composition comprises an unhydrolyzed or at least partially hydrolyzed polyvinyl formamide polymer for improved edge coverage of the coating when plated onto a conductive substrate. The plated coating can be cured.
    Type: Grant
    Filed: June 19, 2008
    Date of Patent: November 22, 2011
    Assignee: BASF Coatings GmbH
    Inventor: Charles L Tazzia
  • Patent number: 7364645
    Abstract: The present invention provides an improved two-layer coating system. The present invention relates to a process for forming a cured gradient coating film, comprising the steps of: applying an aqueous electrodeposition coating composition comprising at least two resins and a curing agent, on an electrically conductive substrate, heating a electrodeposition coating film to form a layer separation, and then, curing the electrodeposition coating film to form a cured gradient coating film; wherein the resins include one resin component constituting a resin layer (a) in direct contact with air before applying top coating and other resin component constituting a resin layer (b) in direct contact with the electrically conductive substrate, and, wherein a solubility parameter (?a) of a resin component A and a solubility parameter (?b) of a resin component B have a specific relationship.
    Type: Grant
    Filed: November 7, 2003
    Date of Patent: April 29, 2008
    Assignee: Nippon Paint Co., Ltd.
    Inventors: Hisaichi Muramoto, Koji Izumiya
  • Patent number: 7094324
    Abstract: With the use of a lead-free cationic electrodeposition coating composition containing a sulfonium-modified epoxy resin, an amine-modified novolak-type epoxy resin, and a blocked isocyanate curing agent as a binder resin, wherein the content of volatile organic components is 1% by weight or less, the coating liquid conductivity is 1000 to 2500 ?S/cm, and the minimum film-forming temperature of the coated layer electrodeposited on an object to be coated is 20 to 35° C., electrodeposition coating is carried out at or above the temperature which is lower by 2° C. than the minimum film-forming temperature and at or below the temperature which is higher by 6° C. than the minimum film-forming temperature.
    Type: Grant
    Filed: March 26, 2003
    Date of Patent: August 22, 2006
    Assignees: Nippon Paint Co., Ltd., Toyota Jidosha Kabushiki Kaisha
    Inventors: Satoru Uchidoi, Yoshio Kojima, Mitsuo Yamada, Seiji Yokoi, Satoshi Kodama
  • Patent number: 6951602
    Abstract: The invention relates to the use of a water-soluble polyvinyl alcohol (co)polymer or a mixture of polyvinyl alcohol (co)polymers as additives in aqueous electrodeposition baths, to electrodeposition baths comprising a polyvinyl alcohol (co)polymer, and to a method of coating an electrically conductive substrate.
    Type: Grant
    Filed: June 29, 2000
    Date of Patent: October 4, 2005
    Assignee: BASF Coatings AG
    Inventors: Hardy Reuter, Dagmar Schemschat, Karl-Heinz Grosse-Brinkhaus, Ulrich Heimann, Walter Jouck
  • Patent number: 6855430
    Abstract: The present invention relates to parts for car body comprising plastic-covered metallic material prepared by sticking a plastic film having a topcoat finishing property on one side or both sides of a molded and electrodeposition coated metallic material and to a coat-finishing process of a car body by using said parts for car body.
    Type: Grant
    Filed: October 4, 2001
    Date of Patent: February 15, 2005
    Assignee: Kansai Paint Co., Ltd.
    Inventors: Tadayoshi Hiraki, Akira Tominaga, Takeshi Yawata
  • Patent number: 6790329
    Abstract: It is an object of the present invention to provide a method of forming a coating film by which a coating film excellent in weathering resistance, light degradation resistance, smoothness and the like can be formed on the outer panel portion of an article to be coated such as a car, and a coating film excellent in rust prevention can be formed on the inner panel portion (bag-structured portion) of the article to be coated, with the interface between the outer and inner panel portions of the article being excellent in rust prevention and finish as well, and by which resources saving and coating cost reduction can be expected.
    Type: Grant
    Filed: November 26, 2001
    Date of Patent: September 14, 2004
    Assignee: Nippon Paint Co., Ltd.
    Inventors: Hiroyuki Sakamoto, Noriyuki Tsuboniwa, Motoki Fujii, Kazuo Morichika, Ichiro Kawakami
  • Patent number: 6761973
    Abstract: The present invention provides a cationic resin composition comprising a cationic resin (A) and a blocked polyisocyanate (B) obtained by reacting an active hydrogen-containing component comprising a diol (a) which has two hydroxyl groups having different reactivities from each other and which has a molecular weight of 76 to 150 and a carboxyl group-containing diol (b) having a molecular weight of 106 to 500 with a polyisocyanate compound (c).
    Type: Grant
    Filed: September 5, 2002
    Date of Patent: July 13, 2004
    Assignee: Kansai Paint Co., Ltd.
    Inventors: Shigeo Nishiguchi, Koji Kamikado, Souichi Ikejiri, Hideki Iijima
  • Patent number: 6746588
    Abstract: The invention provides a cationic electrodeposition method requiring the immersion of a conductive substrate in a coating composition, applying a voltage between an anode and the conductive substrate, and removing the substrate from the coating composition. The coating composition of the invention comprises, in an aqueous medium, an aqueous dispersion of a resin composition comprising: (A) a polymer having at least one primary carbamate group and one or more quaternary ammonium groups, (B) a carbamate functional reactive additive which is generated insitu during the production of polymer (A) and (C) a compound having a plurality of active methylol or methylalkoxy groups that are reactive with said carbamate groups.
    Type: Grant
    Filed: October 26, 2001
    Date of Patent: June 8, 2004
    Assignee: BASF Corporation
    Inventor: Timothy S. December
  • Patent number: 6607646
    Abstract: An improved aqueous cathodic electrocoating composition having a binder of an epoxy-amine adduct and a blocked polyisocyanate crosslinking agent; wherein the improvement is the use of a hydoxyl-carbonate blocked polyisocyanate crosslinking agent. Electrodeposited finishes are formed that have reduced weight loss when heated to cure.
    Type: Grant
    Filed: September 12, 2001
    Date of Patent: August 19, 2003
    Assignee: E. I. du Pont de Nemours and Company
    Inventor: Allisa Gam
  • Publication number: 20030127332
    Abstract: The invention relates to a method for producing multilayer paint coatings according to which: (1) an electrophoretic paint that can be cathodically deposited is deposited on an electrically conductive substrate; (11) at least one coating material is applied to the resulting elecetrophonaic paint coat; (111) the electrophoretic paint coat and the at least one coat consisting of the coating material are subsequently hardened together. The electrophoretic paint contains an aqueous dispersion and can be produced by polymerizing at least one ethylenically unsaturated monomer in an aqueous solution of a protonized epoxy amine adduct, whereby the epoxy amine adduct can be obtained by reacting: (A) at least one glycidyl ether of a polyphenol which, in the statistical mean, contains at least one epoxy group in the molecule; (B) at least one polyglycidyl ether of a polyol which, in the statistical mean.
    Type: Application
    Filed: August 26, 2002
    Publication date: July 10, 2003
    Inventors: Wolfgang Bremser, Karl-Heinz Grosse-Brinkhaus, Egon Wegner
  • Publication number: 20030008156
    Abstract: A composition for electrophoretic deposition of a protective coating. The composition comprises a cationic resin emulsion; and a curative mixed with the cationic resin emulsion. The composition after electrophoretic deposition and curing provides the protective coating that has a concentration of extractable ionic contaminants less than about 200 nanograms/cm2; and a concentration of labile components less than about 36,000 nanograms/cm2.
    Type: Application
    Filed: June 26, 2001
    Publication date: January 9, 2003
    Applicant: 3M Innovative Properties Company
    Inventors: Alphonsus V. Pocius, Rita A. Latourelle
  • Patent number: 6471843
    Abstract: The invention provides a cathodic electrocoat coating composition having (A) a polymer comprising at least one primary carbamate group and at least one cationic salting site, (B) a curing agent having groups that are reactive with said functional groups on (A), and (C) a reactive additive comprising at least one compound having a molecular weight of from 131 to 2000 and comprising at least one primary carbamate group and at least one alkyl group selected from the group consisting of branched alkyl groups of from 5 to 30 carbons, straight chain alkyl groups of more than 10 carbons, and mixtures thereof, wherein one or both of (A) and (B) comprise groups that are reactive with the primary carbamate group of (C).
    Type: Grant
    Filed: July 17, 2001
    Date of Patent: October 29, 2002
    Assignee: BASF Corporation
    Inventors: Timothy S. December, Walter H Ohrbom
  • Patent number: 6447662
    Abstract: A process for pretreating surfaces made from steel, galvanised steel and/or aluminum and/or alloys thereof, wherein, in a first process stage, phosphating is performed using a low-nickel zinc phosphating solution; in a second process stage, the phosphated surfaces are post-rinsed using an aqueous solution which contains 0.001 to 10 g/l of lithium ions; copper ions and/or silver ions; and, in a third process stage, a low-lead cathodically depositable electrocoating lacquer is applied which contains no more than 0.05 wt. % of lead, relative to the dry solids content of the lacquer.
    Type: Grant
    Filed: April 6, 2001
    Date of Patent: September 10, 2002
    Assignee: Henkel Kommanditgesellschaft auf Aktien
    Inventors: Jan-Willem Brouwer, Bernd Schenzle, Peter Kuhm, Winfried Wichelhaus, Helmut Endres
  • Patent number: 6437055
    Abstract: The present invention is directed to electrodepositable coating compositions comprising an at least partially gelled resin or reaction product formed from reacting (i) an epoxy-functional polyester with (ii) an amine. The present invention also includes a method for electrocoating a conductive substrate with the described electrodepositable coating compositions. Additionally, the present invention is directed to a conductive substrate coated according to the described method.
    Type: Grant
    Filed: April 7, 2000
    Date of Patent: August 20, 2002
    Assignee: PPG Industries Ohio, Inc.
    Inventors: Thomas C. Moriarity, Geoffrey R. Webster, Jr.
  • Patent number: 6423765
    Abstract: A process for cationic electrodeposition coating which comprises the steps of: (1) immersing a substrate in a cationic electrodeposition coating composition: (2) applying a voltage between an anode and said substrate, which serves as a cathode, to thereby cause coat film deposition; and (3) further applying a voltage to the coat film deposited so as to increase electric resistance per unit volume of said coat film, wherein, in said step (3), coat films are deposited at those sites of the substrate where coat films have not yet been deposited, said cationic electrodeposition coating composition having a time point when the electric resistance per unit volume of the coat film deposited increases in the course of electrodeposition under constant-current conditions.
    Type: Grant
    Filed: August 17, 2000
    Date of Patent: July 23, 2002
    Assignee: Nippon Paint Co., LTD
    Inventors: Ichiro Kawakami, Hiroyuki Sakamoto, Hitoshi Hori, Takao Saito, Masahiro Nishio
  • Patent number: 6417292
    Abstract: The present invention is directed to electrodepositable coating compositions providing improved film flexibility and humidity resistance. The compositions contain a substantially ungelled resin or reaction product formed from reacting (i) an epoxy functional polyester with (ii) an amine. The present invention also includes a method for electrocoating a conductive substrate with the described electrodepositable coating compositions. Additionally, the present invention is directed to a conductive substrate coated according to the described method.
    Type: Grant
    Filed: April 7, 2000
    Date of Patent: July 9, 2002
    Assignee: PPG Industries Ohio, Inc.
    Inventors: Thomas C. Moriarity, Venkatachalam Eswarakrishnan, Keith S. Ritter
  • Publication number: 20020074228
    Abstract: The present invention provides an electrodeposition coating composition excellent in storage stability and capable of forming a novel multilayer structure and thus useful in the three-wet one-bake coating technique which is intended for coating process curtailment, cost reduction and environmental impact reduction and by which coating films not only comparable in appearance, solvent resistance and corrosion resistance to the conventional three-coat films but also excellent in shock resistance (chipping resistance) can be formed.
    Type: Application
    Filed: October 25, 2001
    Publication date: June 20, 2002
    Applicant: NIPPON PAINT CO., LTD.
    Inventors: Hisaichi Muramoto, Kouichi Ohara
  • Patent number: 6395162
    Abstract: A car body coating process of forming a shell body using a metal plate covered with a preformed film or shield to the main outer portions of a car body, or forming a shell body equipping car parts, which have been made by cutting, molding and joining a plastics-covered metal plate for the main outer portions of a car body, to a previously assembled main body of a car body, and then coating the exposed metal portion in the shell body by electrodeposition.
    Type: Grant
    Filed: August 6, 1999
    Date of Patent: May 28, 2002
    Assignee: Kansai Paint Co., Ltd.
    Inventors: Tadashi Watanabe, Tadayoshi Hiraki, Akira Tominaga, Takeshi Yawata
  • Publication number: 20020056642
    Abstract: A multi-layer coating film-forming method which comprises coating a cationic electrodeposition coating composition (A) containing a blocked polyisocyanate compound as a crosslinking agent to form a non-cured electrodeposition coating film, coating a water based intercoat coating composition (B1) containing a hydroxyl group and carboxyl group-containing base resin, a blocked polyisocyanate crosslinking agent, a fine aluminum powder and a titanium oxide white pigment onto the non-cured electrodeposition coating film to form a non-cured intercoat coating film, followed by heat curing both coating films simultaneously.
    Type: Application
    Filed: September 19, 2001
    Publication date: May 16, 2002
    Inventors: Syuichi Ikenoue, Akira Kasari
  • Patent number: 6372824
    Abstract: Disclosed are a cationic electrodeposition coating composition and a process for preparing the same in which the dried coating film of the electrodeposition paint has an epoxy-acrylic double-layered structure for displaying excellent properties, and in which an organic solvent content can be minimized. The cationic electrodeposition coating composition having a resinoid dispersed into an aqueous medium comprises a cationic electrodeposition resin and an organic solvent of less than 2.0 percent by weight based on a dispersed solution of the cationic electrodeposition resin.
    Type: Grant
    Filed: April 14, 2000
    Date of Patent: April 16, 2002
    Assignee: Daihan Paint & Ink Co., Ltd.
    Inventors: Ki-Myong Song, Jong-Myung Hong, Hoon Chung, Seung-Jae Back
  • Patent number: 6372108
    Abstract: Novel alkaline polymeric binders, preferably amino epoxy binders, for use in cathodic electrodeposition coatings have a number average molecular mass of 1000 to 3000, an amine value of 150 to 250 mg KOH/g binder and 50 to 230 milliequivalents/100 g binder of beta-hydroxyalkyl urethane groups of the formula HOCnH2nOC(O)NH— where n=2 to 3, as well as processes for making such binders; aqueous compositions, particularly cathodic electrodeposition compositions containing such binders (which provide improved throwing power); and process of using such compositions, particularly on automotive bodies and parts thereof, are disclosed.
    Type: Grant
    Filed: May 16, 2000
    Date of Patent: April 16, 2002
    Assignee: E. I. du Pont de Nemours and Company
    Inventors: Helmut Hoenig, Roland Feola, Johann Gmoser, Robert Thausz
  • Patent number: 6362255
    Abstract: It is an object of the present invention to provide a cationic electrodeposition coating composition which is free of toxic rust-preventive pigments such as lead compounds and capable of giving coating films having high resistance to corrosion and rusting, even when applied to a substrate surface which is only insufficiently subjected, to a chemical conversion treatment. The present invention provides a cationic electrodeposition coating composition which comprises a rust inhibitor comprising at least one compound selected from the group consisting of compounds containing any of elemental metals belonging to the period 4, 5 or 6 of group 3 of the periodic table and a sulfonium- and propargyl group-containing resin composition. For, example, the content of said rust inhibitor is 0.03 to 10 weight parts in terms of the elemental metal in the rust inhibitor based on 100 weight parts of the solid resins in the resin composition.
    Type: Grant
    Filed: February 16, 2001
    Date of Patent: March 26, 2002
    Assignee: Nippon Paint Co., Ltd.
    Inventors: Hiroyuki Sakamoto, Takayuki Kokubun, Kenichi Yoshizawa, Toshitaka Kawanami, Yoshiaki Okumura, Ichiro Kawakami
  • Publication number: 20020027077
    Abstract: An electrodeposition coating composition that is excellent in bath stability and that can give a cured film enhanced in hardness and an electrodeposition coating process is provided.
    Type: Application
    Filed: August 16, 2001
    Publication date: March 7, 2002
    Inventors: Hiroyuki Sakamoto, Ichiro Kawakami, Koji Izumiya, Takao Saito, Masahiro Nishio
  • Patent number: 6315882
    Abstract: The present invention has for its object to provide a basic cationic electrodeposition coating composition with does not detract from either storage stability or bath stability even though it is basic and which does not make the coating equipment such as the electrodeposition tank and associated piping corroded, and a method for producing it. The present invention is directed to a basic cationic electrodeposition coating composition having a hydrogen ion concentration within the range of 7.5 to 12.0 in terms of hydrogen ion exponent (pH), and a method for producing it.
    Type: Grant
    Filed: January 21, 1999
    Date of Patent: November 13, 2001
    Assignee: Nippon Paint Co., Ltd.
    Inventors: Hiroyuki Sakamoto, Ichiro Kawakami, Takayuki Kokubun, Toshitaka Kawanami, Takao Saito
  • Patent number: 6303690
    Abstract: The invention provides a cathodic electrocoat coating composition having (A) a polymer comprising at least one primary carbamate group and at least one cationic salting site, (B) a curing agent having groups that are reactive with said functional groups on (A), and (C) a reactive additive comprising at least one compound having a molecular weight of from 131 to 2000 and comprising at least one primary carbamate group and at least one alkyl group selected from the group consisting of branched alkyl groups of from 5 to 30 carbons, straight chain alkyl groups of more than 10 carbons, and mixtures thereof, wherein one or both of (A) and (B) comprise groups that are reactive with the primary carbamate group of (C).
    Type: Grant
    Filed: December 15, 1999
    Date of Patent: October 16, 2001
    Assignee: BASF Corporation
    Inventors: Timothy S. December, Walter H Ohrbom
  • Patent number: 6183616
    Abstract: A method of stabilization of electrolyte bath in electrocoating by immersing a substrate in the bath filled with a cationic electrocoating composition containing a basic resin and an amine compound and carrying out electrocoating; wherein said basic resin in said bath contains, per 100 grams of the resin solids, 10 to 300 millimoles of sulfonium group and 50 to 2,000 millimoles of carbon—carbon unsaturated bond, and said amine compound is contained in an amount of 1 to 50 millimoles per 100 grams of the basic resin solids in the bath, said amount being not less than 5 mole percent relative to the sulfonium group content in said basic resin, so that the sulfonium group remaining in the coat amount to not more than 50% relative to the sulfonium group contained in the electrocoating composition in said bath.
    Type: Grant
    Filed: July 22, 1999
    Date of Patent: February 6, 2001
    Assignee: Nippon Paint Co., Ltd.
    Inventors: Hiroyuki Sakamoto, Takayuki Kokubun, Ichiro Kawakami, Toshitaka Kawanami, Hitoshi Hori, Takao Saito
  • Patent number: 6136895
    Abstract: The present invention can provide a cationic electrocoating composition, comprising:(a) an acrylic resin functioning as a leveling agent, which has both an amino group and an acid group in one molecule and has a hydroxyl value of 50 to 200,(b) a base resin, and(c) a crosslinking agent,wherein the acrylic resin (a) is formulated in an amount of 0.1 to 20 percent by weight, based on the total weight of a mixture of the base resin (b) and the crosslinking agent (c), and the cationic electrocoating composition is substantially free from lead compound. The present invention also provides a method for preventing cratering or cissing on an electrocoated film formed from the cationic electrocoating composition.
    Type: Grant
    Filed: June 25, 1999
    Date of Patent: October 24, 2000
    Assignee: Nippon Paint Co., Ltd.
    Inventors: Toshitaka Koyama, Takahiro Mukae, Shinji Nakano, Mitsuo Yamada
  • Patent number: 6130274
    Abstract: Disclosed are an aqueous dispersion for a low-temperature curable cationic electrodeposition coating composition and a process for preparing the same in which the dried coating film of the electrodeposition paint has an epoxy-acrylic double-layered structure for displaying excellent properties, and in which an organic solvent content can be minimized to zero. The aqueous dispersion of the cationic electrodeposition coating composition can be manufactured by using (a) a cationic electrodeposition synthetic resin which is obtained by an amino addition reaction of a polyepoxide, (b) an acrylic cationic electrodeposition resin having an amino group, (c) an ester-modified styrene-allyalcohol copolymer synthesized by an esterification reaction of styrene-allylalcohol copolymer with a fatty acid; and (d) a polyurethane-type crosslinking agent prepared by the reaction of methyethyl ketoxime-partially-blocked diisocyanate with trimethylol propane.
    Type: Grant
    Filed: July 15, 1998
    Date of Patent: October 10, 2000
    Assignee: Daihan Paint & Ink Co., Ltd.
    Inventors: Ki-Myong Song, Jong-Myung Hong, Hoon Chung, Seung-Jae Back
  • Patent number: 6110341
    Abstract: Disclosed is an improved electrodeposition bath composition which is comprised of a resinous phase dispersed in an aqueous medium, the resinous phase comprising an active hydrogen group-containing cationic electrodepositable resin and a curing agent having functional groups reactive with the active hydrogen groups of the resin. The improvement comprises the inclusion in the electrodeposition bath composition of an organic phosphorous-based compound of specific structures. The electrodeposition bath compositions provide excellent corrosion resistance to electrocoated substrates, particularly untreated steel, and reduced corrosivity of the acidic cationic electrodeposition bath to steel equipment and pipes. Also disclosed is a method of electrocoating a conductive substrate using the improved electrodeposition bath compositions of the invention. Metallic substrates coated by this method are also disclosed.
    Type: Grant
    Filed: October 22, 1998
    Date of Patent: August 29, 2000
    Assignee: PPG Industries Ohio, Inc.
    Inventors: Neil D. McMurdie, Robert R. Zwack
  • Patent number: 6106684
    Abstract: A cation electrodeposition coating process and cation electrodeposition coating composition that have a sufficient throwing power are provided. A process for cationic electrodeposition coating which comprises the steps of:(1) immersing a substrate in a cationic electrodeposition coating composition;(2) applying a voltage between an anode and the substrate, which serves as a cathode, to thereby cause coat film deposition; and(3) further applying a voltage to the coat film deposited so as to increase electric resistance per unit volume of the coat film,wherein, in step (3), coat films are deposited at those sites of the substrate where coat films have not yet been deposited, the cationic electrodeposition coating composition having a time point when the electric resistance per unit volume of the coat film deposited increases in the course of electrodeposition under constant-current conditions.
    Type: Grant
    Filed: March 23, 1998
    Date of Patent: August 22, 2000
    Assignee: Nippon Paint Co., Ltd.
    Inventors: Ichiro Kawakami, Hiroyuki Sakamoto, Hitoshi Hori, Takao Saito, Masahiro Nishio
  • Patent number: 6093299
    Abstract: This invention relates to a stove-enamel coating medium based on at least one binder vehicle selected from amino(meth)acrylate resins and/or epoxide-amine addition products comprising cationic groups and/or groups which can be converted into cationic groups. The binder vehicle additionally comprises cyclic carbonate groups and/or at least one crosslinking agent which comprises cyclic carbonate groups is present, and the binder vehicle also contains secondary amino groups and/or hydroxyl groups.
    Type: Grant
    Filed: February 10, 1998
    Date of Patent: July 25, 2000
    Assignee: Herberts Gesellschaft Mit Beschrankter Haftung
    Inventors: Joachim Blum, Klausjorg Klein, Hans-Peter Patzschke, Bettina Vogt-Birnbrich
  • Patent number: 6020069
    Abstract: An improved aqueous cathodic electrocoating composition of an aqueous carrier having dispersed therein a film forming binder of (1) an epoxy-resin amine adduct and (2) a blocked polyisocyanate crosslinking agent; wherein the improvement is an epoxy resin amine adduct which is a reaction product of an epoxy resin and a polyhydric phenol which is chain extended with a primary amine to form a chain extended epoxy resin having epoxy end groups and an equivalent amine to epoxy ratio is 1-10 to 4-10 and wherein the epoxy end groups of the resin are reacted with a ketimine and/or a diamine and the resulting chain extended epoxy resin has an epoxy equivalent weight of about 700-2,000 and is neutralized with an organic or inorganic acid; wherein the electrocoating composition has improved throw power and forms coatings that have improved corrosion resistance in comparison to conventional electrocoating compositions formed from epoxy resins extended with conventional diamines or polyols.
    Type: Grant
    Filed: June 18, 1998
    Date of Patent: February 1, 2000
    Assignee: E. I. du Pont de Nemours and Company
    Inventors: Joseph A. Antonelli, Christopher Scopazzi
  • Patent number: 5961802
    Abstract: A cationic resin having latent primary amine functionality is described. The latent amine functionality is obtained by reacting a cyclic anhydride with an amine compound having two primary amine groups and one secondary amine group. The cationic resin is combined with a curing agent having a plurality of cyclic carbonate groups in an electrocoat bath.
    Type: Grant
    Filed: September 30, 1997
    Date of Patent: October 5, 1999
    Assignee: BASF Corporation
    Inventors: Timothy S. December, Paul J Harris
  • Patent number: 5928730
    Abstract: A process for forming a cured paint film from a paint containing, as a binder, a resin containing a carbonyl group, or a resin, or a resin mixture containing a carbonyl group and a carboxyl group or a paint containing, as a binder, a resin containing a resin or a resin mixture containing a group which forms a carboxyl group in the subsequent contact step with a hydrazine compound or polyhydrazide compound. The uncured paint film, which contains a carbonyl group, or a carbonyl group and a carboxyl group or a group that forms a carboxyl group, is subjected to a step of curing the paint film by allowing the uncured paint film to contact with a hydrazine compound or a polyhydrazide compound.
    Type: Grant
    Filed: November 25, 1997
    Date of Patent: July 27, 1999
    Assignee: Kansai Paint Co., Ltd.
    Inventor: Yasuharu Nakayama
  • Patent number: 5908912
    Abstract: An electrodepositable coating composition is provided comprising (a) an active hydrogen-containing, cationic salt group-containing resin electrodepositable on a cathode; (b) a curing agent for transurethanation, transamidation or transesterification curing like at least a partially capped polyisocyanate curing agent; and (c) a catalytic mixture of bismuth and an amino acid or amino acid precursor. Optionally, an auxiliary acid may be present to increase the effectiveness of the amino acid in the mixture with bismuth.
    Type: Grant
    Filed: June 3, 1997
    Date of Patent: June 1, 1999
    Assignee: PPG Industries Ohio, Inc.
    Inventors: Raphael O. Kollah, Matthew S. Scott, Gregory J. McCollum, Joseph A. Bethoski
  • Patent number: 5902473
    Abstract: An electrodeposition process using an aqueous coating composition comprising a carbamate-functional crosslinking agent and at least one principal resin is described. The carbamate-functional crosslinker is formed by first reacting a polyamine having at least two primary amine groups and at least one secondary amine group with a cyclic carbonate, and then reacting the product of the first reaction with a polyepoxide compound.
    Type: Grant
    Filed: June 30, 1997
    Date of Patent: May 11, 1999
    Assignee: BASF Corporation
    Inventors: Paul J. Harris, Peter D. Clark, Timothy S. December
  • Patent number: 5763507
    Abstract: An aqueous paint which exhibits improved dispersion property in the water and dispersion stability, has a low viscosity enabling the painting operation to be efficiently carried out, and cures at low temperatures within short periods of time to form a coating which after cured exhibits high degree of workability, high corrosion resistance, and elutes out little into the content. The aqueous paint comprises an epoxy acrylate resin prepared by modifying, with a (meth)acrylic monomer, a copolymerized epoxy resin having a number average molecular weight of 8,000 to 15,000 and containing, as phenolic components, a bisphenol-A component and a bisphenol-F component at a molar ratio of from 5:5 to 8:2, and a curing agent of a thermosetting resin having a methylol group.
    Type: Grant
    Filed: December 19, 1996
    Date of Patent: June 9, 1998
    Assignee: Toyo Seikan Kaisha, Ltd.
    Inventors: Toshinori Moriga, Shunji Kojima, Seishichi Kobayashi
  • Patent number: 5759372
    Abstract: The invention relates to aqueous electrodeposition coating materials comprising cathodically depositable synthetic resins and further comprising a reaction product (A) and a polymerization initiator (B) which forms free radicals, wherein the cathodically depositable synthetic resin is different from the reaction product (A), and the reaction product (A) is prepared by reacting(a) a polyisocyanate or a mixture of polyisocyanates with(b) an organic compound which contains both at least one ethylenically unsaturated double bond and at least one active hydrogen atom per molecule, or a mixture of such organic compounds, and(c) an organic compound which contains both at least one active hydrogen atom and at least one tertiary amino group and/or at least one ketimine and/or at least one aldimine group per molecule, or a mixture of such organic compounds, and if desired(d) an organic compound which is different from (b) and (c) and contains at least one active hydrogen atom per molecule, or a mixture of such organic
    Type: Grant
    Filed: December 19, 1995
    Date of Patent: June 2, 1998
    Assignee: BASF Lacke + Farben AG
    Inventors: Hardy Reuter, Gunther Ott, Walter Jouck
  • Patent number: 5760107
    Abstract: An electrodepositable composition is provided comprising:(A) a non-gelled cationic resin which is derived from a polyepoxide and which contains in the resin molecule cationic salt groups and active hydrogen groups selected from aliphatic hydroxyl and primary and secondary amino; and present as a separate component(B) a fully capped polyisocyanate curing agent containing substantially no free isocyanate groups. The electrodepositable composition contains from about 0.02 to 1.0 milliequivalents phenolic hydroxyl groups per gram of resin solids, and from about 0.1 to 2.0 milliequivalents beta-hydroxy ester groups per gram of resin solids. The composition provides excellent corrosion resistance when electrodeposited over steel substrates, and does not require lead in the formulation nor the use of a conventional chrome rinse for the steel substrate pretreatment before electrodeposition.
    Type: Grant
    Filed: October 1, 1996
    Date of Patent: June 2, 1998
    Assignee: PPG Industries, Inc.
    Inventors: Joseph T. Valko, Philippe Faucher, Richard F. Karabin, Thomas C. Moriarity, V. Eswarakrishnan, Ellor J. Van Buskirk, Gregory J. McCollum, Raphael O. Kollah
  • Patent number: 5744521
    Abstract: A cathodic electrodeposition paint containing a cationically modified epoxy resin and a crosslinker dispersed in an acidic aqueous medium is disclosed. The paint contains as an auxiliary component for improving the surface smoothness of the cured paint films a t-alkylphenol novolac resin-alkylene oxide adduct or a reaction product thereof with a half blocked diisocyanate.
    Type: Grant
    Filed: January 7, 1997
    Date of Patent: April 28, 1998
    Assignee: Nippon Paint Co., Ltd.
    Inventors: Haruhiko Takasaki, Mitsuo Yamada
  • Patent number: 5702581
    Abstract: A simplified process for producing a corrosion-protecting, well adhering lacquer coating, and the workpieces obtained thereby, is described. The process comprisessubjecting a metal substrate to a pre-treatment by spray or dip phosphate treatment and without subsequent passivation treatment, optionally after a drying,carrying out an electrophoretic dip lacquer coating of the metal substrate treated in this way wherein an electro dip lacquer is used which contains bismuth in the form of an organic bismuth complex and/or a bismuth salt of an organic carboxylic acid in a content of 0.1 to 5 wt. % calculated as bismuth and related to the binder solids in the electro dip lacquer.
    Type: Grant
    Filed: May 23, 1996
    Date of Patent: December 30, 1997
    Assignee: Herberts GmbH
    Inventors: Klaus Gunter Kerlin, Peter Hamacher
  • Patent number: 5635049
    Abstract: An aqueous coating composition that is particularly adapted for repairing defects in coated metal articles comprises an aqueous dispersion having as its major ingredient an epoxy phosphate ester polymer, a cross-linking agent for the epoxy phosphate ester polymer which may be an aminoplast or phenoplast resin, and an effective quantity of an organic solvent having a solubility parameter in the range of 8.5-10 and being soluble in water at 20.degree. C. to the extent of less than 10%. The composition is desirably electrocoated upon the object at a temperature in the range of from 80.degree. to 120.degree. F. and preferably from about 90.degree.-100.degree. F.
    Type: Grant
    Filed: June 6, 1995
    Date of Patent: June 3, 1997
    Assignee: The Valspar Corporation
    Inventors: Richard G. Mysliwczyk, William H. McCarty, Arthur T. Spencer
  • Patent number: 5630922
    Abstract: An electrodepositable composition is provided comprising (a) an active hydrogen-containing, cationic salt group-containing resin electrodepositable on a cathode; (b) a capped polyisocyanate curing agent; and (c) a diorganotin dicarboxylate; wherein the dicarboxylate is at least one long chain carboxylate having from 14 to 22 carbon atoms and the diorganotin dicarboxylate is present in the electrodepositable composition in an amount of at least 0.01 percent by weight tin based on weight of total solids of the electrodepositable composition. The composition provides improved storage stability without precipitation of dibutyltin oxide, and when electrodeposited over conductive substrates, there is no loss of cure response and appearance properties.
    Type: Grant
    Filed: December 26, 1995
    Date of Patent: May 20, 1997
    Assignee: PPG Industries, Inc.
    Inventors: Venkatachalam Eswarakrishnan, Robert R. Zwack, Gregory J. McCollum, Raphael O. Kollah, Steven R. Zawacky
  • Patent number: 5594049
    Abstract: The electrodeposition coating composition contains a base resin and a curing agent. The curing agent comprises a compound containing an aromatic isocyanurate ring and 3 or more blocked isocyanate groups wherein at least one of said blocked isocyanate groups is blocked with glycol ether.
    Type: Grant
    Filed: June 7, 1995
    Date of Patent: January 14, 1997
    Assignee: Nippon Paint Co., Ltd.
    Inventors: Mitsuo Yamada, Yusaku Kobata
  • Patent number: 5589049
    Abstract: The invention relates to a method of of coating electrically conductive substrates using cathodically depositable electrodip paints. The invention is notable in that the electrodip paints employed contain crosslinked polymer microparticles which can be prepared by reacting(A) a compound which contains on average more than 1.0 epoxide groups per molecule, or a mixture of such compounds, and(B) a compound which contains not only a group reactive toward epoxide groups but also at least one ketimine or aldimine group in the molecule, or a mixture of such compoundsto give a noncrosslinked intermediate product (C), which still contains on average at least one epoxide group per molecule, and dispersing this intermediate product in the presence of a Br onsted acid in an aqueous medium.
    Type: Grant
    Filed: August 22, 1994
    Date of Patent: December 31, 1996
    Assignee: BASF Lacke +Farben, AG
    Inventors: G unther Ott, Hardy Reuter, Walter Jouck, Susanne Piontek, Ulrich Heimann, John Gilbert
  • Patent number: 5554700
    Abstract: Catalysed, cationic compositions which contain one or more catalysed, cationic binders which can be diluted in water after being protonated and which contain one or more bismuth salts of hydroxycarboxylic acids are disclosed. The bismuth salts of lactic acid and dimethylolpropionic acid are particularly preferred, and the compositions are useful in cathodically precipitated paints.
    Type: Grant
    Filed: November 28, 1994
    Date of Patent: September 10, 1996
    Assignee: Vianova Resins AG
    Inventors: Rudolf Schipfer, Gerhard Schmoelzer, Edmund Urbano