Abstract: Disclosed is a metal particle having a maximum dimension of not more than 1 mm surface-treated with an aqueous solution containing phosphate ions, soluble ions of vanadium and oxygen. This particle can be a metallic pigment having excellent brightness retention and wetting properties to a binder resin.

Abstract: A novel aqueous dispersion type resin composition obtained by the method comprising polymerizing at least one .alpha.,.beta.-ethylenically unsaturated monomer in an aqueous medium containing a water soluble resin with an amphoionic group of the formula ##STR1## (in which R and Y are defined in the specification) and in the presence of an organic initiator, the solid weight ratio of said water soluble resin to said monomer being, 10:90 to 90:10. The aqueous coating composition based on said resin composition is excellent in storage stability, application characteristics and capable of resulting a coating with excellent film properties.

Abstract: The present invention provide a novel coating method for forming a metallic coat having excellent appearance. The coating method comprises the successive steps of:(a) coating an article with an sealercoating composition,(b) coating the sealercoated article with an aqueous metallic basecoating composition without curing the sealercoating composition,(c) flashing and/or baking the article obtained in Step (b),(d) coating the article obtained in Step (c) with a thermosetting clear coating composition, and,(e) baking the coated article.

Abstract: The present invention provides a metallic paint film featuring a remarkably excellent coating appearance as well as weather resistance, by using a specific combination of a water borne paint and thermosetting clear paint in compliance with the wet-on-wet two-coat, one-bake painting method.

Abstract: An anticorrosive metal surface pretreating composition comprising an aqueous emulsion of hard polymer microparticles and a water soluble chromium compound, the polymer microparticles being prepared by emulsion polymerization of .alpha.,.beta.-unsaturated monomers including polyfunctional monomer(s) or monomer(s) capable of resulting polymer with a specific Tg value in the presence of a particular type of polymer as an emulsifier and a chromium compound, including specified amounts of trivalent chromium.

Abstract: An aqueous coating composition which comprises at least one aqueous resin selected from polyester, alkyd, acrylic, acryl modified--polyester and acryl modified--alkyd resins, and at least one water--insoluble resinous particles obtained by the polymerization or copolymerization of .alpha., .beta.--ethylenically unsaturated monomers, which is characterized by that said resinous particles are composed of mixture of (A) group of particles having a mean grain diameter of 0.3.about.6.mu. and (B) group of particles having a mean grain diameter of 0.01.about.0.1.mu., in weight ratio of (A)/(B)=99.9/0.1.about.40/60 and that the solid weight ratio of said aqueous resin to water insoluble resinous particles is 99/1.about.15/85. The coating composition is well balanced in application characteristics and in film performance as gloss and surface smoothness and hence is quite useful as a top coat.

Abstract: An anticorrosive metal surface pretreating composition comprising:(a) an emulsion of polymer particles comprising at least one .alpha., .beta.-ethylenically unsaturated monomers, bearing thereon, as protective colloid, an oligomer with hydrophylic groups comprising at least one .alpha.,.beta.-ethylenically unsaturated monomer, the mean diameter of the particles being 0.1 to 3.mu. and the particles being formed as hard microparticles through internal gelation or having a glass transition point from 15.degree. to 110.degree. C., and(b) a water soluble chromium compound, 25 to 50% by weight of the total chromium contained being of trivalent, the weight ratio of said emulsion solid to metallic chromium being 1:10.about.5:1. The present composition affords a pretreatment coating with improved anticorrosive, bending and scratch resistant properties on various metallic substrates.

Abstract: An aqueous coating composition which comprises (A) at least one aqueous resin selected from acryl, alkyd, polyester, acryl-modified alkyd and acryl-modified polyester resins, (B) at least one component selected from water-insoluble resinous particles having an average grain diameter of 0.3 to 6.mu., obtained by a polymerization of ethylenically unsaturated compound(s), and (C) optional additives, the weight ratio of said (A) to (B) (in solid) being 99:1.about.15:85. This aqueous paint is especially useful as a top-coat.

Abstract: An aqueous coating composition which comprises (A) at least one aqueous resin selected from acryl, alkyd, polyester, acryl--modified alkyd and acryl-modified polyester resins, (B) at least one component selected from water-insoluble resinous particles having an average grain diameter of 0.01 to 0.1.mu., obtained by a polymerization of ethylenically unsaturated compound(s), and (C) optional additives, the weight ratio of said (A) to (B) (in solid) being 99:1.about.15:85. This aqueous paint is especially useful as a top-coat.

Abstract: A cathode-depositing electrocoating composition which comprises as a film-forming component a carbon-to-carbon double bond containing resin having a principal chain of acetylene-conjugated diene random copolymer and a basic group, combined to the principal chain in a ratio of from 0.02 to 0.8 mol per 100 g of said resin and capable of forming in an aqueous medium a group of the formula: ##STR1## wherein R.sub.1 and R.sub.2, which are the same or different, are each a hydrogen atom, a halogen atom or a hydrocarbon residue having 1 to 6 carbon atoms, R.sub.3 and R.sub.4 which are the same or different, are each a hydrogen atom or an organic residue having 1 to 10 carbon atoms or are combined to form together with the intermediary nitrogen atom a cyclic group having 1 to 7 carbon atoms, and X is a hydrogen atom or a bond, and when X is a bond, both the carbon atoms carrying R.sub.1 and R.sub.

Abstract: A process for preparing copolymers of acetylene and conjugated diene compounds by copolymerization of acetylene with at least one conjugated diene compound in the presence of a catalyst composition in a reactor, characterized in that the catalyst composition comprises a dialkyl aluminum halide, an organic nickel compound and an active hydrogen compound, of which the molar concentrations have the following relationships:[Al]=2[Ni]+[H][Al]/[Ni]>4wherein [Al], [Ni] and [H] represent respectively the molar concentrations of the dialkyl aluminum halide, of the organic nickel compound and of the active hydrogen compound, whereby the copolymer was obtained in a good yield without by-production of any gel material.