COOLANT FOR FUEL CELL

• Main Authors: WATARI TETSUSHI, WATABE GAO, FUKUICHI MASAYUKI, KARASAWA RYO, YOSHII YOICHIRO
• Format: Patent
• Language: English; Japanese
• Published: 28.12.2023
• Subjects: ADHESIVES; BASIC ELECTRIC ELEMENTS; CHEMISTRY; DYES; ELECTRICITY; MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FORELSEWHERE; METALLURGY; MISCELLANEOUS APPLICATIONS OF MATERIALS; MISCELLANEOUS COMPOSITIONS; NATURAL RESINS; PAINTS; POLISHES; PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSIONOF CHEMICAL INTO ELECTRICAL ENERGY

To provide a coolant for a fuel cell capable of suppressing decolorization of the coolant due to dye in the coolant being adsorbed by an ion exchange resin.SOLUTION: In a coolant for fuel cell, the coolant includes a base and a dye for coloring, the dye has a cyanine structure, the cyanine structure is a closed cyanine structure having two condensed rings of a benzene ring and a pyrrolidine ring, the two nitrogen atoms constituting the closed cyanine structure have a structure connected by a polymethine chain, at least one of the two nitrogen atoms constituting the closed cyanine structure includes a linear side chain having 5 or more carbon atoms that may contain a heteroatom of at least one of a nitrogen atom and an oxygen atom.SELECTED DRAWING: None 【課題】冷却液中の染料がイオン交換樹脂に吸着されることで冷却液が脱色するのを抑制することができる燃料電池用の冷却液を提供する。【解決手段】燃料電池用の冷却液であって、前記冷却液は、基剤と、着色用の染料を含み、前記染料は、シアニン構造を有し、前記シアニン構造は、ベンゼン環とピロリジン環の縮合環を２つ有する閉鎖シアニン構造であり、前記閉鎖シアニン構造を構成する２つの窒素原子はポリメチン鎖によって繋がれた構造を有し、前記閉鎖シアニン構造を構成する２つの窒素原子の内の少なくとも一方は、窒素原子及び酸素原子の内の少なくとも一方のヘテロ原子を含有していてもよい炭素数５以上の直線状の側鎖を含むことを特徴とする冷却液。【選択図】なし