Abstract: An electrocoat system for electrodeposition is described. The system includes an inorganic bismuth-containing compound or a mixture of inorganic and organic bismuth-containing compounds. The system demonstrates a high degree of crosslinking and produces a cured coating with optimal crosslinking and corrosion resistance.

Abstract: An aqueous electrodeposition coating composition comprising (a) a metal oxide selected from the group consisting of bismuth oxide, vanadium oxide, manganese oxide, cobalt oxide, zinc oxide, strontium oxide, yttrium oxide, molybdenum oxide, zirconium oxide, lanthanum oxide, oxides of the lanthanide series of elements, and combinations of these and (b) a cathodically electrodepositable binder, the binder comprising an amine-functional phosphorylated resin, provides corrosion protection equivalent to that obtained by the conventional phosphate pretreatment-electrodeposition coating process.

Abstract: The present invention provides a cationic electrodeposition coating composition that has excellent throwing power and that can form a thin film with excellent finish and anti-corrosion properties. The composition has a cationic epoxy resin (A) and a blocked polyisocyanate (B), the cationic epoxy resin (A) obtained by reacting an epoxy resin (A1) with an amino group-containing compound (A2). The epoxy resin (A1) having a catechol skeleton structure (a) and obtained by reacting an epoxy resin (a1) containing at least one epoxy group per molecule and having an epoxy equivalent of 180 to 500 with a phenolic hydroxyl group-containing compound (a2) containing at least one phenolic hydroxyl group per molecule in amounts wherein the ratio of the number of moles of epoxy groups in the epoxy resin (a1) to the number of moles of phenolic hydroxyl groups in the phenolic hydroxyl group-containing compound (a2) is 1.3 to 2.0.

Abstract: A cationic electrodeposition coating is provided having excellent covering power (clearance application properties), edge anticorrosion properties, and finish properties. The cationic electrodeposition coating composition comprises a specific amino-group-containing epoxy resin; blocked polyisocyanate obtained by reacting an active hydrogen-containing component containing propylene glycol, and a polyisocyanate compound; and 0.1-20 mass parts of a cationic electrodepositing gelled microparticulate polymer obtained by crosslinking an acrylic copolymer containing hydrolyzable alkoxysilane groups and cationic groups, per a total of 100 mass parts of the solids fraction of the amino-group-containing epoxy resin and the blocked polyisocyanate compound.

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.

Abstract: This invention concerns a method for forming a coating film on a metallic substrate by a multistage energization method at no less than two stages using an electrodeposition bath which comprises a water-based film-forming agent comprising zirconium compound and, as the base resin, an amino group-containing modified epoxy resin which is obtained through reaction of an epoxy resin with an amino group-containing compound, said epoxy resin having been obtained through reaction of a diepoxide compound, a bisphenol epoxy resin and bisphenols; whereby coated articles excelling in corrosion resistance are offered.

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.

Abstract: The invention provides a curable electrodepositable coating composition that has improved durability in the presence of metal ions. The coating composition includes one or more ungelled, active hydrogen-containing ionic salt group-containing resins which are electrodepositable on an electrode, one or more curing agents, and one or more metal deactivators.

Abstract: Provided is an electrodepositable coating composition of a resinous phase dispersed in an aqueous medium, the resinous phase including (a) an active hydrogen-containing, cationic salt group-containing resin; and (b) an at least partially blocked polyisocyanate curing agent. The composition contains an organotin catalyst which is or is derived from a dialkyltin compound having the structure (I): [R1][R2]—Sn?O??(I) where R1 and R2 are the same or different, and each independently represents a monovalent hydrocarbon group wherein the sum of the carbon atoms in R1 and R2 is greater than 8. The catalyst is present in an amount sufficient to effect cure at a temperature at or below 340° F. (171.1° C.). Methods of preparing and using the composition also are provided.

Abstract: Disclosed is an electrodeposition bath comprising a mixture of (i) at least one boron-containing compounds and (ii) chlorhexidine for controlling the growth of microorganisms in the electrodeposition bath. The combination of (i) and (ii) at a low concentration provides better control of microbes than does either (i) or (ii) at higher concentrations.

Abstract: The present invention provides a lead-free cationic electrodeposition coating composition which contains an aqueous medium, a binder resin composed of a cationic epoxy resin and a blocked isocyanate curing agent dispersed or dissolved in the aqueous medium, a neutralizing acid in order to neutralize the cationic epoxy resin, an organic solvent, and a metal catalyst, wherein the electrodeposition coating composition has a volatile organic content of 1% by weight or less, a metal ion content of 500 ppm or less, a neutralizing acid amount of 10 to 30 mg equivalent based on 100 g of binder resin solid content. The lead-free cationic electrodeposition coating composition has high throwing power, and exert a little influence on the environment due to its low VOC, low metal ion content, and reduced consumption of a coating composition itself.

Abstract: A coating film-forming method, which method comprises coating a cationic electrodeposition coating composition onto a substrate, followed by heat curing to form a cured electrodeposition coating film, said cationic electrodeposition coating composition containing a base resin consisting of an amine-added epoxy resin (A) obtained by reacting an epoxy resin (a1) with at least one modifying agent selected from the group consisting of a polyhydric polyol (a2), an epoxy compound (a3) of the polyhydric polyol and a cyclic ester compound (a4), a polyphenol compound (a5) and an amino group-containing compound (a6), and a curing agent consisting of a blocked polyisocyanate curing agent (B) obtained by reacting at least one polyisocyanate compound (b1) selected from the group consisting of an aromatic polyisocyanate compound and an alicyclic polyisocyanate compound with at least one blocking agent (b2) selected from the group consisting of an oxime compound, aliphatic alcohols, aromatic alkyl alcohols and ether alcohol

Abstract: A process for producing a multicoat system on a substrate, in which a) an electrodeposition coating film is deposited on the substrate, b) the electrodeposition coating film is predried by heating to a predrying temperature for a predetermined period, c) a coat of a surfacer is applied to the electrodeposition coating film, and d) the electrodeposition coating film and the coat of the surfacer are baked together at elevated temperatures, and in which the predrying temperature in step b) is equal to the temperature (Tp) or lies above the temperature (Tp) at which the loss factor tan ?, which is the quotient formed from the loss modulus E? and the storage modulus E?, of the unbaked electrodeposition coating material shows a maximum, and the use of the resulting multicoat system.

Abstract: A multi-layer electrodeposition coating film-forming method which comprises subjecting a cationic electrodeposition coating composition containing at least two emulsions to an electrodeposition coating, said cationic electrodeposition coating composition being such that a difference in an electrical quantity (a) required for deposition starting between a first coating composition comprising a first emulsion and a second coating composition comprising a second emulsion in two emulsions selected from the at least two emulsions is in the range of 50 to 400 C/m2.

Abstract: The present invention is directed to a curable electrodepositable coating composition having a resinous phase dispersed in an aqueous medium. The resinous phase includes (a) one or more ungelled, active hydrogen-containing cationic salt group-containing resins which are electrodepositable on a cathode; (b) one or more at least partially blocked polyisocyanate curing agents; (c) at least one substantially non-volatile antioxidant; and (d) at least one volatile antioxidant. The present invention also provides a process for electrodeposition using the coating and substrates coated therewith.

Abstract: An improved aqueous cathodic electrocoating composition having a binder of an epoxy-amine adduct and a crosslinking agent; wherein the improvement is the use of a crosslinking agent having at least one, preferably a plurality of morpholine dione groups per molecule. Electrodeposited finishes are formed that have reduced volatile emissions and film weight loss when heated to cure.

Abstract: An improved aqueous cathodic electrocoating composition having a binder of an epoxy-amine adduct and a polyisocyanate crosslinking agent; wherein the improvement is the use of a polyisocyanate crosslinking agent having at least one crosslinkable morpholine dione group per molecule. Electrodeposited finishes are formed that have reduced volatile emissions and film weight loss when heated to cure.

Abstract: The invention provides a photodegradation resistant curable electrodepositable coating composition which includes one or more ungelled, active hydrogen-containing cationic sulfonium salt group-containing resins which are electrodepositable on a cathode, and one or more curing agents having cationic groups or groups which are capable of forming cationic groups. The invention also provides processes for coating an electroconductive substrate with the coating composition, to form single layer or multi-layer composite coatings. Also provided is a multi-layer composite coating in which the electrodepositable coating composition is used to form the primer layer. The compositions have improved throw power versus typical sulfonium salt electrodepositable compositions.

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.

Abstract: The present invention provides a process for forming a plural layer coating film which is excellent in a chipping resistance and a corrosion resistance, characterized by comprising the steps of coating a cationically electrodepositable coating material (a) on an article to be coated and curing it by heating, then coating a water based thermoplastic chipping resistant coating material (b) and controlling a solid content in the coating film to 40% by weight or more, thereafter coating a water based intermediate coating material (c) and curing both coating films of the coating material (b) and the coating material (c) by heating and then coating a top coating material (d) and curing it.

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).

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.

Abstract: The present invention relates to an electrodepositable coating composition having a resinous phase dispersed in an aqueous medium. The resinous phase includes (a) an ungelled, active hydrogen-containing, ionic salt group-containing resin; and (b) a curing agent reactive with the active hydrogens of the resin (a). The resinous phase has a covalently bonded halogen content based on total weight of resin solids present in the resinous phase such that when the composition is electrodeposited and cured, the cured film passes flame resistance testing in accordance with IPC-TM-650, and has a dielectric constant of less than or equal to 3.50. The invention also is directed to a method for forming a dielectric coating on an electroconductive substrate using the electrodepositable coating composition, as well as to a substrate coated with the electrodepositable composition.

Abstract: Provided is a biodegradation resistant cationic electrodeposition composition of a resinous phase dispersed in an aqueous medium. The resinous phase includes an electrodepositable resin having cationic onium salt groups which have been at least partially solubilized with an &agr;-alkoxycarboxylic acid of formula (I), where R is C1 to C6 alkyl or aryl and R′ is H or C1 to C2 alkyl. Also provided is a method of electrocoating a conductive substrate serving as a cathode in an electrical circuit where the cathode and an anode are immersed in an aqueous electrodeposition bath containing the biodegradation resistant cationic electrodepositable composition described above, and substrates coated by the method.

Abstract: This invention provides, at a low cost, a low-pollution type cationic electro-coating bath composition which contains neither lead nor chromium, and which comprises cationic electrodeposition paint and, contained therein, a bismuth oxide paste, the amount of the bismuth oxide paste being within a range of 0.1 to 0.3% by weight as metal bismuth on the basis of total solid content of said cationic electro-coating bath composition, and the bismuth oxide paste being prepared by dispersing bismuth oxide (B) in an organic acid-neutralized aqueous dispersion of diethanol amine-added alicyclic epoxy resin (A).

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.

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.

Abstract: Disclosed is an improved electrodeposition bath having a reduced volatile organic content. The bath contains a resinous phase dispersed in an aqueous medium, the resinous phase including an active hydrogen-containing ionic electrodepositable resin and a curing agent therefor. The improved electrodeposition bath further includes a boron-containing compound in an amount sufficient to retard the growth of microorganisms in the bath. Also disclosed is a method of electrocoating a conductive substrate using the improved electrodeposition bath of the invention. Substrates which are coated using the method of the invention are also disclosed.

Abstract: This invention is directed to a highly stable composition and application process for cathodic electrodeposition of a coating which is thermally curable at very low baking temperatures. The invention provides both long-term stability of the bath composition prior to application and highly crosslinked corrosion resistant films when cured at baking temperatures as low as 93° C.

Abstract: Provided is a biodegradation resistant cationic electrodeposition composition of a resinous phase dispersed in an aqueous medium.

Abstract: The present invention provides a cationic resin composition capable of forming a cationically electrodepositable coating film which is excellent in corrosion resistance, an aptitude for the cationic electrodepositable coating of a rust preventive steel plate and in adhesion to substrate, which cationic resin composition is characterized by comprising the following components: (A) an amino group-containing epoxy resin which is prepared by adding an amino group-containing compound to an epoxy resin having an epoxy equivalent of 400 to 3000, (B) a polyol-modified amino group-containing epoxy resin which is prepared by making an epoxy resin having an epoxy equivalent of 180 to 2500 react with an amino group-containing compound and with a polyol compound obtained by adding caprolactone to a compound having plural active hydrogen groups, and (C) a blocked polyisocyanate curing agent, component (A) being 40 to 70% by weight, component (B) being 4 to 40% by weight, and component (C) being 10 to 40% by weight, base

Abstract: The present invention provides a cationically electro-depositable coating composition comprising as a cross-linking agent, a blocked polyisocyanate having a blocked isocyanate group represented by Formula (I): (wherein R1 represents a hydrogen atom, methyl, ethyl or propyl, and R2 represents methyl or ethyl) or a self cross-linking type base resin having the blocked isocyanate group represented by Formula (I) described above.

Abstract: This invention provides a car body coating process wherein the metal-exposed portion of a shell body, a part or whole of which has been made of plastics-covered metal plates, is electrocoated with use of an electrodeposition paint which contains no coloring pigment and has a bath solid content of at most 10% by weight and which is capable of forming a clear coating film.

Abstract: Disclosed are a resin dispersion and a low-temperature curable cationic electrodeposition coating composition including the same, in which the dried coating film of the electrodeposition paint is lead-free and has an epoxy-acrylic double-layered structure for displaying excellent properties, and in which an organic solvent content can be minimized. The resin dispersion includes a cationic electrodeposition resin, deionized water, an acid for a neutralization, a reaction product of manganese phosphate and an acid diluted to a concentration of 10% in deionized water and a cationic surfactant.

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).

Abstract: Disclosed is an electrodeposition coating process which comprises: a first electrodeposition step in which an electrodeposition coated film is partially formed on a substrate surface to be coated with using a lead-free cationic electrodeposition coating composition which is modified so that a coated film deposited on the substrate surface from the coating composition (deposited film) has relatively low glass transition temperature; a second electrodeposition step in which an electrodeposition coated film is formed on an uncoated portion of the substrate surface with using a lead-free cationic electrodeposition coating composition which is modified so that the deposited film has relatively high glass transition temperature; and a step of baking the electrodeposition coated film to cure.

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.

Abstract: The present invention provides a method for forming a multi-layer paint film, comprising:

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.

Abstract: A cationic electrodeposition coating composition is provided which contains blocked isocyanate curing agent which is blocked with a substance not recognized as a HAPs (hazardous atmospheric pollutant). The cationic electrodeposition coating composition of the present invention contains a cationic group-containing epoxy modified base resin and a blocked isocyanate curing agent, wherein said blocked isocyanate curing agent is obtained by reacting a polyisocyanate compound with, as a blocking agent, a terminal primary OH-containing propylene glycol monoalkyl ether and expressed by the formula RO(CH(CH3)CH2O)nH (where R is an alkyl group having 1 to 8 carbons, which may be branched, and n is 1 to 3).

Abstract: A two-component concentrate which includes an aqueous dispersion of a cathodically depositable binder having groups comprising active hydrogen that are cross-linkable using blocked polyisocyanate, as the binder component, and an anhydrous, organic solution of an oxime-blocked isocyanate-functional adduct of aromatic polyisocyanate and at least one compound comprising at least one group capable of addition towards isocyanate and at least one tertiary amino group, as the cross-linking component is used for the preparation of cathodic electrodeposition coating compositions.

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.

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.

Abstract: A two-component concentrate which includes an aqueous dispersion of a cathodically depositable binder having groups comprising active hydrogen that are cross-linkable using blocked polyisocyanate, as the binder component, and an anhydrous, organic solution of an oxime-blocked isocyanate-functional adduct of aromatic polyisocyanate and at least one compound comprising at least one group capable of addition towards isocyanate and at least one tertiary amino group, as the cross-linking component is used for the preparation of cathodic electrodeposition coating compositions.

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.

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).

Abstract: There is disclosed a cationic electrodeposition coating composition containing bismuth lactate derived from a lactic acid, whose L-isomer content is at least 80% by weight, or bismuth methoxyacetate in a form of being dissolved in an aqueous medium. The electrodeposition coating composition can form a coating film having excellent anticorrosivity and finishing property without containing a lead compound.

Abstract: The invention provides a process for preparing an allophanate-containing compound in the presence of a metal catalyst and a tertiary amine. In a preferred process, the tertiary amine compound also has a hydroxyl group. The hydroxyl group can react with the isocyanate functionality. Also disclosed is a process in which an allophanate-containing compound is prepared with copper acetate monohydrate as a catalyst. The allophanate-containing compound is used as a curing agent in coating compositions, particularly electrocoat coating compositions. The coating compositions are used to coat articles.

Abstract: An electrocoat coating composition comprising an electrodepositable resin that has functionality reactive with isocyanate and a curing agent having at least one allophanate groups is described. The invention also provides a method of applying the composition of the invention to a substrate and curing the applied coating.

Abstract: A cathodic electrocoating composition comprises an aqueous carrier, a film forming binder, comprising an epoxy-amine adduct and a blocked polyisocyanate crosslinking agent, dispersed in the carrier, and a novel additive comprising the reaction product of (1) a polyoxy alkylene di or monoamine; (2) a glycidoxy alkyl alkoxy silane; and (3) a glycidyl compound selected from the group consisting of a glycidyl ester of a carboxylic acid and an alkyl glycidyl ether, which reaction product is hydrolyzed in the presence of acid and water to convert alkoxysilane moieties to silanol moieties. The electrocoat composition produces coatings having a smoother appearance with better edge coverage and fewer craters.