COATING FILM FORMATION METHOD

• Main Authors: OGAWA TSUYOSHI, HATTORI KEI, ISHII RYOTA, KURATA YUSUKE, TSUNODA TSUYOSHI
• Format: Patent
• Language: English; Japanese
• Published: 18.05.2022
• Subjects: ADHESIVES; APPLYING LIQUIDS OR OTHER FLUENT MATERIALS TO SURFACES, IN GENERAL; CHEMICAL PAINT OR INK REMOVERS; CHEMISTRY; COATING COMPOSITIONS, e.g. PAINTS, VARNISHES ORLACQUERS; CORRECTING FLUIDS; DYES; FILLING PASTES; INKS; METALLURGY; MISCELLANEOUS APPLICATIONS OF MATERIALS; MISCELLANEOUS COMPOSITIONS; NATURAL RESINS; PAINTS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; PERFORMING OPERATIONS; POLISHES; PROCESSES FOR APPLYING LIQUIDS OR OTHER FLUENT MATERIALS TOSURFACES, IN GENERAL; SPRAYING OR ATOMISING IN GENERAL; TRANSPORTING; USE OF MATERIALS THEREFOR; WOODSTAINS

To provide a method for formation of a coating film which is excellent in transparency, and exhibits good scratch resistance and good weather resistance.SOLUTION: In a coating film formation method with use of a two-component clear paint composition in which a main agent (A) and a curing agent (B) are mixed and coated, the main agent (A) contains: a hydroxyl group-containing acrylic resin (A-1) that has a hydroxyl value of 100 to 200 mgKOH/g and a mass average molecular weight of 2,000 to 20,000 g/mol; and a resin fine particle (A-2) having an average particle diameter of 0.01 to 1 μm. The resin fine particle is configured from: (a) a monomer with three or more polymerizable double bonds of 30 to 40% by mass; (b) a monomer with two polymerizable double bonds of 0 to 20% by mass; (c) a monomer with a hydroxyl group and one polymerizable double bond of 0 to 7% by mass; and (d) a monomer with one polymerizable double bond other than (a), (b) and (c) of 33 to 70% by mass, and in the resin fine particle, a total amount of (a), (b), (c) and (d) is 100% by mass.SELECTED DRAWING: None 【課題】透明性に優れ、かつ良好な耐傷付き性、良好な耐候性を示す塗膜形成方法を提供する。【解決手段】主剤（Ａ）及び硬化剤（Ｂ）を混合して塗装する二液型クリヤー塗料組成物を用いる塗膜形成方法において、主剤（Ａ）は、水酸基価１００～２００ｍｇＫＯＨ／ｇ、質量平均分子量２，０００～２０，０００ｇ／ｍｏｌである、水酸基含有アクリル樹脂（Ａ－１）と、（ａ）３個以上の重合性二重結合を有する単量体：３０～４０質量％、（ｂ）２個の重合性二重結合を有する単量体：０～２０質量％、（ｃ）水酸基および１個の重合性二重結合を有する単量体：０～７質量％、および（ｄ）（ａ）、（ｂ）および（ｃ）以外の１個の重合性二重結合を有する単量体：３３～７０質量％、から構成され、（ａ）、（ｂ）、（ｃ）および（ｄ）の合計量を１００質量％とする、平均粒子径０．０１～１μｍの樹脂微粒子（Ａ－２）と、を含有することを特徴とする。【選択図】なし