A composition contains: an aromatic ring-containing compound; a fluorine atom-containing polymer; and an organic solvent. The fluorine atom-containing polymer has: a first structural unit represented by formula (1); and a second structural unit represented by formula (2). In the formula (1), R.sup.1 represents a fluorine atom-containing monovalent organic group having 1 to 20 carbon atoms; and R.sup.2 represents a hydrogen atom or a monovalent hydrocarbon group having 1 to 20 carbon atoms. In the formula (2), R.sup.3 represents a monovalent hydrocarbon group having 1 to 20 carbon atoms; and R.sup.4 represents a hydrogen atom or a monovalent hydrocarbon group having 1 to 20 carbon atoms.

##STR00001##

A composition contains: an aromatic ring-containing compound; a fluorine atom-containing polymer; and an organic solvent. The fluorine atom-containing polymer has: a first structural unit represented by formula (1); and a second structural unit represented by formula (2). In the formula (1), R.sup.1 represents a fluorine atom-containing monovalent organic group having 1 to 20 carbon atoms; and R.sup.2 represents a hydrogen atom or a monovalent hydrocarbon group having 1 to 20 carbon atoms. In the formula (2), R.sup.3 represents a monovalent hydrocarbon group having 1 to 20 carbon atoms; and R.sup.4 represents a hydrogen atom or a monovalent hydrocarbon group having 1 to 20 carbon atoms.

##STR00001##

A casting green sand mold comprising at least a pair of green sand mold parts each having a cavity portion, which are stacked with their cavity portions aligned to form a metal-melt-receiving cavity; each of the green sand mold parts being formed by casting sand containing a binder and water; a hardening-resin-based coating layer being formed on at least the cavity portion of each green sand mold part; the coating layer having gas-permeable pores having sufficient permeability to permit a gas generated by pouring a metal melt to escape; and a water content in a surface layer including the coating layer in a range from the cavity surface to the depth of 5 mm being smaller than that in the inner portion of the green sand mold.

A casting green sand mold comprising at least a pair of green sand mold parts each having a cavity portion, which are stacked with their cavity portions aligned to form a metal-melt-receiving cavity; each of the green sand mold parts being formed by casting sand containing a binder and water; a hardening-resin-based coating layer being formed on at least the cavity portion of each green sand mold part; the coating layer having gas-permeable pores having sufficient permeability to permit a gas generated by pouring a metal melt to escape; and a water content in a surface layer including the coating layer in a range from the cavity surface to the depth of 5 mm being smaller than that in the inner portion of the green sand mold.

The present invention relates to polyvinyl chloride aggregate particles, in which a particle diameter D50 at a cumulative volume percentage of 50 vol % in a volume particle size distribution is 0.5 μm or more and 5.0 μm or less, and a particle diameter D90 at a cumulative volume percentage of 90 vol % in the volume particle size distribution is 8.0 μm or less, and a Na concentration in the polyvinyl chloride aggregate particles is 90 ppm or less. The present invention relates to a composition for a metal can coating material, a composition for a marking film and a method for producing the same, and a coating film that contain the polyvinyl chloride aggregate particles. This provides polyvinyl chloride aggregate particles capable of imparting high transparency and retort resistance to a coating film of a metal can, and/or capable of imparting high transparency and water resistance to a marking film.

The present invention relates to polyvinyl chloride aggregate particles, in which a particle diameter D50 at a cumulative volume percentage of 50 vol % in a volume particle size distribution is 0.5 μm or more and 5.0 μm or less, and a particle diameter D90 at a cumulative volume percentage of 90 vol % in the volume particle size distribution is 8.0 μm or less, and a Na concentration in the polyvinyl chloride aggregate particles is 90 ppm or less. The present invention relates to a composition for a metal can coating material, a composition for a marking film and a method for producing the same, and a coating film that contain the polyvinyl chloride aggregate particles. This provides polyvinyl chloride aggregate particles capable of imparting high transparency and retort resistance to a coating film of a metal can, and/or capable of imparting high transparency and water resistance to a marking film.

The present invention relates to a process of forming electrical conductor on a substrate comprising the steps of a) providing a substrate; b) providing an electrically conductive composition; c) applying said electrically conductive composition to at least one part of said substrate; and d) exposing said electrically conductive composition on the substrate to a near infrared light to form an electrical conductor. NIR light cure provides improved electrical properties of the cured composition without damaging heat sensitive substrates.

The present invention relates to a process of forming electrical conductor on a substrate comprising the steps of a) providing a substrate; b) providing an electrically conductive composition; c) applying said electrically conductive composition to at least one part of said substrate; and d) exposing said electrically conductive composition on the substrate to a near infrared light to form an electrical conductor. NIR light cure provides improved electrical properties of the cured composition without damaging heat sensitive substrates.

Provided is a primer composition capable of forming, in a short time, a primer coating film excellent in adhesion to a metal substrate, adhesion to a polyamide resin-containing finish coating film, and corrosion resistance. A primer composition comprises: a phenol resin (A); a polyamide resin (B); and a solvent (C), wherein the phenol resin (A) is a resol-type phenol resin, the polyamide resin (B) is soluble in the solvent (C), and a solid content mass ratio (A/B) between the phenol resin (A) and the polyamide resin (B) is 80/20 to 99/1.

Provided is a primer composition capable of forming, in a short time, a primer coating film excellent in adhesion to a metal substrate, adhesion to a polyamide resin-containing finish coating film, and corrosion resistance. A primer composition comprises: a phenol resin (A); a polyamide resin (B); and a solvent (C), wherein the phenol resin (A) is a resol-type phenol resin, the polyamide resin (B) is soluble in the solvent (C), and a solid content mass ratio (A/B) between the phenol resin (A) and the polyamide resin (B) is 80/20 to 99/1.