C - Chemistry – Metallurgy – 09 – K
Patent
C - Chemistry, Metallurgy
09
K
C09K 5/00 (2006.01) C09K 5/10 (2006.01)
Patent
CA 2261940
A heat transfer fluid is disclosed which comprises a glycol, a phosphate, and a copolymer additive which is a copolymer of an ethylenically substituted carboxylic acid and an aldehyde. A method for preparing the heat transfer fluid comprises admixing 92 to 96 weight percent of one or more glycols; 2 to 4 weight percent of a phosphate; and 0.01 to 0.25 weight percent of the copolymer additive. Precipitation of phosphate salts is inhibited in phosphate-containing glycol- based fluids by the addition of the copolymer additive before mixing the fluid with water.
Fluide de transmission thermique composé d'un glycol, d'un phosphate et d'un additif copolymère, ce dernier étant un copolymère d'un acide carboxylique substitué en éthylène et d'un aldéhyde. Procédé pour préparer le fluide de transmission thermique, consistant à mélanger 92 à 96 pour-cent en poids d'un ou de plusieurs glycols, 2 à 4 pour-cent en poids d'un phosphate et 0,01 à 0,25 pour-cent en poids de l'additif copolymère. La précipitation des sels de phosphate est inhibée dans les fluides à base de glycol contenant du phosphate par l'addition de l'additif copolymère avant de mélanger le fluide à l'eau.
Mendoza Abel
Ogle Mark E.
Dow Global Technologies Inc.
Smart & Biggar
The Dow Chemical Company
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