Abstract: The present invention provides a cationic electrodeposition coating composition having good appearance of coated film and high throwing power, and a method for making an amine-modified epoxy resin used for the cationic electrodeposition coating composition. The present invention relates to a method for making an amine-modified epoxy resin comprised in a cationic electrodeposition coating composition comprising the steps of: providing a half blocked isocyanate by reaction of an isocyanate compound with a blocking agent, preparing a blocked prepolymer by reaction of the half blocked isocyanate with a polyol, forming an epoxy resin containing oxazolidone ring by reaction of the blocked prepolymer with a diglycidyl ether type epoxy resin, chain-extending the epoxy resin containing oxazolidone ring with at least saturated or non-saturated hydrocarbon group containing dicarboxylic acid, and modifying the chain-extended epoxy resin with an amine.

Abstract: The present invention provides a cationic electrodeposition coating composition having good appearance of coated film and high throwing power, and a method for making an amine-modified epoxy resin used for the cationic electrodeposition coating composition. The present invention relates to a method for making an amine-modified epoxy resin comprised in a cationic electrodeposition coating composition comprising the steps of: providing a half blocked isocyanate by reaction of an isocyanate compound with a blocking agent, preparing a blocked prepolymer by reaction of the half blocked isocyanate with a polyol, forming an epoxy resin containing oxazolidone ring by reaction of the blocked prepolymer with a diglycidyl ether type epoxy resin, chain-extending the epoxy resin containing oxazolidone ring with at least saturated or non-saturated hydrocarbon group containing dicarboxylic acid, and modifying the chain-extended epoxy resin with an amine.

Abstract: To provide a method for producing a pigment dispersing resin varnish for cationic electrodeposition paint, wherein the flow properties and appearance of the resulting electrodeposition coating film are not compromised when using as a solvent a compound that is not volatilized into the atmosphere but remains in the electrodeposition coating film during the onium conversion of a pigment dispersing resin, as well as a cationic electrodeposition resin composition allowing HAPs to be eliminated and volatile organic carbon compounds to be reduced (VOC reduction). A method for producing a pigment dispersing resin varnish for use with cationic electrodeposition paint, wherein a solvent comprising a polyalkylene oxide compound represented by the following formula is used to produce a resin varnish which has been obtained from a cationic epoxy resin composition having amino groups, phosphonium groups, or sulfonium groups.

Abstract: Disclosed is a novel amino-polyether-modified epoxy for an electrodeposition paint. The amin-polyether-modified epoxy compound is obtained by reacting amino polyether represented by a formula as follow: wherein m is an integer of 5 or more, R is hydrogen, methyl group or ethyl group, and n is 2 or 3, with polyglycidyl ether having a molecular weight of 1,000 to 7,000 and an epoxy equivalent of 500 to 3,500, wherein an equivalent ratio of a primary amino group of the amino polyether to an epoxy group of the polyglycidyl ether is controlled within the range of 0.52 to 1.0.

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 cationic electrodeposition coating composition which contains a plasticizer is provided, which does not cause poor adhesion with intermediate and top coats, and allows the VOC content to be reduced. The cationic electrodeposition coating composition of the present invention is a cationic electrodeposition coating composition which contains a cationic group-containing epoxy modified base resin, a blocked isocyanate curing agent and a plasticizer, wherein the plasticizer is a propylene oxide oligomer with an average molecular weight of 200 to 1500, contains a primary hydroxyl group on the repeating terminals of the propylene oxide, and contains one or two primary hydroxyl groups and/or primary amino groups in the molecule.

Abstract: Disclosed is a novel amino-polyether-modified epoxy for an electrodeposition paint.

Abstract: To provide a method for producing a pigment dispersing resin varnish for cationic electrodeposition paint, wherein the flow properties and appearance of the resulting electrodeposition coating film are not compromised when using as a solvent a compound that is not volatilized into the atmosphere but remains in the electrodeposition coating film during the onium conversion of a pigment dispersing resin, as well as a cationic electrodeposition resin composition allowing HAPs to be eliminated and volatile organic carbon compounds to be reduced (VOC reduction). A method for producing a pigment dispersing resin varnish for use with cationic electrodeposition paint, wherein a solvent comprising a polyalkylene oxide compound represented by the following formula is used to produce a resin varnish which has been obtained from a cationic epoxy resin composition having amino groups, phosphonium groups, or sulfonium groups.

Abstract: A cationic electrodeposition coating composition which contains a plasticizer is provided, which does not cause poor adhesion with intermediate and top coats, and allows the VOC content to be reduced. The cationic electrodeposition coating composition of the present invention is a cationic electrodeposition coating composition which contains a cationic group-containing epoxy modified base resin, a blocked isocyanate curing agent and a plasticizer, wherein the plasticizer is a propylene oxide oligomer with an average molecular weight of 200 to 1500, contains a primary hydroxyl group on the repeating terminals of the propylene oxide, and contains one or two primary hydroxyl groups and/or primary amino groups in the molecule.

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).

Abstract: The present invention relates to compounds containing an oxamic acid group, which show high reactivity and have stability for water and are used as paints, adhesives, and plastic materials etc. in the form of a reaction material or a resin. Since into these compounds an oxamic acid group is introduced in a part of the molecule and the oxamic acid group is an ionic functional group, the compounds show superior solubility and dispersing character in water and also, since the oxamic acid group is a group of a disappearing type with heating, the compounds do not remain, after hardening, in the hardened product. Accordingly, the hardened products obtained from these compounds are superior in water-resistant and anticorrosion properties and in durability.

Abstract: The present invention provides a cationic electrocoating composition which cures at the preferred curing temperature range and provides superior curing properties and cured film properties. The cationic electrocoating composition of the present invention comprises a resinous component and an aqueous medium, wherein the resinous component is composed of one or more polymers and has as a whole an active hydrogen containing group, a cationic group and a substituted group and at least one of the polymers comprises a vinyl polymer which has 5 to 1,000 substituted acylamide groups.

Abstract: An aqueous dispersion coating composition comprising at least one kind of resin, wherein any one of said resin or resins has at least one functional group selected from an active hydrogen-containing group, a substituted acylamide group and a water dispersible or water-soluble group, and wherein the resin composition as a whole contains each of the above described kinds of functional groups.

Abstract: An anodic electrodeposition composition containing a water-soluble or water-dispersible modified epoxy resin derived from an epoxy resin having two epoxide groups and at least one alcoholic hydroxy group at the terminals and the middle of the resin backbone, respectively. The modified epoxy resin has at least one polymeric side chain block bound to said alcoholic hydroxy group and at least one acid group derived from said terminal epoxide group.