WATER-BASED PAINT COMPOSITION FOR CAN INNER SURFACE

• Main Authors: CHINO YOSHIAKI, INADA YUICHI
• Format: Patent
• Language: English; Japanese
• Published: 05.10.2017
• Subjects: ADHESIVES; CHEMICAL PAINT OR INK REMOVERS; CHEMISTRY; COATING COMPOSITIONS, e.g. PAINTS, VARNISHES ORLACQUERS; COMPOSITIONS BASED THEREON; CORRECTING FLUIDS; DYES; FILLING PASTES; INKS; MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONSONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS; METALLURGY; MISCELLANEOUS APPLICATIONS OF MATERIALS; MISCELLANEOUS COMPOSITIONS; NATURAL RESINS; ORGANIC MACROMOLECULAR COMPOUNDS; PAINTS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; POLISHES; THEIR PREPARATION OR CHEMICAL WORKING-UP; USE OF MATERIALS THEREFOR; WOODSTAINS

PROBLEM TO BE SOLVED: To provide a water-based paint composition for can inner surface that is excellent in corrosion resistance and processability.SOLUTION: 1. There is provided a water-based paint composition for can inner surface containing a water dispersion in which an urethane resin (A) comprising a constitutional unit derived from a particular polyester polyol (a), a constitutional unit derived from a diisocyanate compound (b), and a constitutional unit derived from a carboxyl group-containing diol (c) are dispersed in an aqueous medium. 2. The water-based paint composition for can inner surface according to claim 1, containing 1,4-cyclohexanedicarboxylic acid as a polybasic acid component (a11). 3. The water-based paint composition for can inner surfaces according to claim 1 or 2, containing 1,4-cyclohexanedimethanol as a diol component (a21).SELECTED DRAWING: None 【課題】 耐食性及び加工性に優れる缶内面用水性塗料組成物を提供すること。【解決手段】１．特定のポリエステルポリオール（ａ）に由来する構成単位、ジイソシアネート化合物（ｂ）に由来する構成単位及びカルボキシル基含有ジオール（ｃ）に由来する構成単位を有するウレタン樹脂（Ａ）が、水性媒体中に分散されてなる水分散体を含有する缶内面用水性塗料組成物。２．多塩基酸成分（ａ１１）として、１，４−シクロヘキサンジカルボン酸を含む１項に記載の缶内面用水性塗料組成物。３．ジオール成分（ａ２１）として、１，４−シクロヘキサンジメタノールを含む１項又は２項に記載の缶内面用水性塗料組成物。【選択図】 なし