Abstract: The present invention provides an aqueous heat-resistant coating composition comprising: (A) an aqueous carboxy-containing acrylic-modified epoxy resin dispersion obtained by neutralizing a carboxy-containing acrylic-modified epoxy resin with a basic compound and dispersing the neutralized resin in an aqueous medium; (B) an inorganic coloring pigment; and (C) a rust-preventive pigment. The present invention further provides a process for applying the same.

Abstract: The present invention relates to metal object-coating method, which method comprises coating a primer composition (I) prepared by adding an inorganic anti-corrosive agent to at least one binder component selected from the group consisting of a binder component (A) containing an epoxy resin and ant least one of amino resin and phenol resin, a binder component (B) containing a polyester resin, epoxy resin and phenol resin, and a binder component (C) containing ?-olefin•?,?-ethylenically unsaturated carboxylic acid copolymer resin onto the surface of a metal object coating substrate to form a primer coating film layer, followed by coating a topcoat coating composition consisting of a thermoplastic resin based coating composition (II) onto the primer coating film layer to form a topcoat coating film layer consisting of a thermoplastic resin coating film layer; and the primer composition used in the method.

Abstract: A surface-treating method of of screw parts, which method consists of coating beforehand a liquid organic resin based coating composition capable of forming a film having a volume resistivity of 1014 &OHgr;·cm or more at normal temperature onto a thread of screw parts to be mounted onto an automobile body by welding prior to a coating step of the automobile body, followed by heating and drying.

Abstract: The present invention relates to a releasable aqueous coating composition containing (A) a resin dispersion containing a carbonyl group-containing copolymer aqueous dispersion and a polyhydrazide compound in such a ratio that an amount of hydrazide group is in the range of 0.02 to 3.0 equivalents per one equivalent of carbonyl group in the emulsion particle, and (B) a release assistant; and a method of temporarily protecting a finished coating film of an automobile body, which method comprises coating said coating composition onto a surface of a finished cured coating film coated onto the automobile body.

Abstract: A releasable aqueous coating composition used for temporarily protecting a finished coating film coated on an automobile body. It contains (A) an aqueous acrylic resin obtained by copolymerizing a monomer mixture of a (meth)acrylic ester monomer as an essential component and other polymerizable unsaturated monomer, except for (meth)acrylonitrile, as an optional component, and having a glass transition temperature of 5.degree. to 30.degree. C. and a weight average molecular weight of 20,000 or more, (B) an ultraviolet light absorber, and (C) a water repellent material. A method of temporarily protecting the finished coating film on the automobile body by coating the releasable aqueous coating composition onto a surface of a finished cured coating film coated onto the automobile body.

Abstract: A process for formation of a water repellent coating which comprises applying a topcoat coating composition of a fluorine containing thermosetting resin and granular compound of 5 microns or less in mean particle size to a substrate bearing a thermosetting undercoat coating film which is semi crosslinked, and then co-curing both films by heating. The resulting cured coating has a water repellent surface, excellent adhesion to a substrate, excellent corrosion resistance, no staying of water as droplets on the surface and no foul odor. The coating is especially suitable for applying to aluminum fins of a heat exchanger.

Abstract: A process for coating a metallic substrate, which comprisesapplying an electrocoating paint to a metallic substrate,then applying a barrier coating comprising a crosslinking hardenable resin and being capable of forming a barrier coat film having an elongation at break of at least 150% and a stress at break of at least 20 kg/cm.sup.2 to the electrocoated film,optionally applying an intermediate coating paint to the barrier coat, andfinally applying a top coating paint to the barrier coat or the intermediate coat.