| 摘要 |
A composition of which at least 95% by weight consists of a mixture of 5-80% urea and 95-20% of an alkali metal or ammonium salt of a saturated carboxylic acid which contains up to 6 carbon atoms, is used as a deicing composition for roads &c. Sodium, potassium or ammonium formate or acetate may be used; ammonium formate is preferred. The composition may also contain trisodium phosphate, sodium polyphosphate or sodium chromate as corrosion inhibitor. The composition may be applied in powder form or as an aqueous solution; solutions may also be used as anti-freeze cooling and heat-transfer liquids in engines or refrigerators. |
