Patent ID: 7645394

Claim:
An antifreeze comprising: (A) a propylene glycol; (B) a first material; and (C) a second material, wherein said first material is selected from the group consisting of normal aliphatic dicarboxylic acid in which number of carbon atoms is from 10 to 12, salt of said normal aliphatic dicarboxylic acid, and mixture of said normal aliphatic dicarboxylic acid and said salt of said normal aliphatic dicarboxylic acid, and said second material is selected from the group consisting of benzimidazole compound which has a benzimidazole skeleton, salt of said benzimidazole compound, triazine compound which has a triazine skeleton and has a mercapto group, salt of said triazine compound, and mixture of a plurality of materials selected from the group consisting of said benzimidazole compound, said salt of benzimidazole compound, said triazine compound, and said salt of triazine compound, wherein said benzimidazole compound is thiabendazole, and said triazine compound is trimercapto-s-triazine.