METALLIC SURFACE TOPCOAT COMPOSITION AND RESIN MOLDED PRODUCT

• Main Authors: MUKUDA TAKAHIRO, YAGI MASATOSHI, SHIBAHARA AKIHISA
• Format: Patent
• Language: English; Japanese
• Published: 11.01.2018
• Subjects: ADHESIVES; CHEMICAL PAINT OR INK REMOVERS; CHEMISTRY; COATING COMPOSITIONS, e.g. PAINTS, VARNISHES ORLACQUERS; COMPOSITIONS BASED THEREON; CORRECTING FLUIDS; DYES; FILLING PASTES; INKS; LAYERED PRODUCTS; LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT ORNON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM; MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVINGCARBON-TO-CARBON UNSATURATED BONDS; METALLURGY; MISCELLANEOUS APPLICATIONS OF MATERIALS; MISCELLANEOUS COMPOSITIONS; NATURAL RESINS; ORGANIC MACROMOLECULAR COMPOUNDS; PAINTS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; PERFORMING OPERATIONS; POLISHES; THEIR PREPARATION OR CHEMICAL WORKING-UP; TRANSPORTING; USE OF MATERIALS THEREFOR; WOODSTAINS

PROBLEM TO BE SOLVED: To provide a metallic surface topcoat composition capable of forming a top coat layer which suppresses occurrence of an interference fringe on a metallic surface and has an excellent balance between scratch resistance and adhesiveness.SOLUTION: A metallic surface topcoat composition contains each component of a copolymer (A) having 15-60 mass% of a structural unit derived from a vinyl monomer having a ring structure having a glass transition temperature of a homopolymer of 100°C or higher, urethane di(meth)acrylate (B) having a bisphenol skeleton and a compound (C) having a (meth)acryloyl group other than the urethane (meth)acrylate (B), where the component (A) is 16-35 mass%, the component (B) is 15-40 mass% and the component (C) is 25-69 mass% with respect to 100 mass% of the total of the component (A), the component (B) and the component (C).SELECTED DRAWING: None 【課題】 金属表面に対して、干渉縞の発生を抑え、耐擦傷性と密着性とのバランスに優れたトップコート層を形成できる金属表面上塗り組成物を提供する。【解決手段】 ホモポリマーのガラス転移温度が１００℃以上である環構造を有するビニル系単量体に由来する構成単位を１５〜６０質量％含む共重合体（Ａ）、ビスフェノール骨格を有するウレタンジ(メタ)アクリレート（Ｂ）及び前記ウレタン(メタ)アクリレート（Ｂ）以外の（メタ）アクリロイル基を有する化合物（Ｃ）の各成分を含む金属表面上塗り組成物であって、前記（Ａ）成分、（Ｂ）成分及び（Ｃ）成分の合計１００質量％に対して、前記（Ａ）成分が１６〜３５質量％、前記（Ｂ）成分が１５〜４０質量％、前記（Ｃ）成分が２５〜６９質量％である、組成物。【選択図】 なし