C - Chemistry – Metallurgy – 09 – K
Patent
C - Chemistry, Metallurgy
09
K
C09K 3/18 (2006.01)
Patent
CA 2130649
The present invention relates to a de-icing and anti-freezing composition for freeing surfaces from snow and ice and for protecting surfaces against the formation of ice. Liquid composition of the invention comprises an aqueous solution of from about 25 to 50% w/v of an alkali metal lactate, from about 2 to 4% v/v of an alpha-thioacid of formula R-CH(SH)-COOH wherein R denotes hydrogen atom or a lower alkyl group, from about 0.2 to 0.8% w/v of calcium chloride and from about 0.2 to 0.8% v/v of silicone-based defoamer. Preferred alkali metal lactate is sodium lactate, while preferred alpha-thioacid is thiolactic acid. For road de-icing, the composition may be used in admixture with stone aggregate having particle size of from about 0.3 to 10 mm.
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