| abstract |
At least 15% exchangeable groups comprising at least one of ions, Lewis acids, or Lewis bases derived from colorants having at least 5 pK a or pK b in a 25 ° C. aqueous solution based on the total number of exchangeable groups A colorant treated ion exchange resin is disclosed. Also disclosed are heat transfer systems, assemblies, fuel cell systems employing the disclosed colorant treated ion exchange resins, and methods for maintaining conductivity of less than 200 μS / cm in heat transfer fluids. Finally, a process for preparing the disclosed colorant treated ion exchange resins is provided.n n n Ion exchange resins, colorants, fuel cells, alternative power sources, conductivity, heat transfer fluids |