| 摘要 |
PURPOSE:To provide the subject composition composed mainly of a specific glycol, containing a rust-proofing agent and hydrazine, stable over a long period even under a high-temperature condition and having excellent heat and corrosion resistances. CONSTITUTION:The objective composition contains (A) preferably about 0.1-7wt.% (especially about 0.5-6wt.%) of a rust-proofing agent composed of mercaptobenzothiazole, methylbenzotriazole, alkylimidazoline, etc., (B) preferably 0.001-1wt.% (especially about 0.01-0.05wt.%) of hydrazine and (C) preferably about 90-99.899wt.% of a 2-9C glycol as a main component. The composition is added to an antifreezing fluid or coolant at a ratio of preferably about 10-50wt.% (especially about 20-40wt.%). |
