Compositions – Etching or brightening compositions
Patent
1996-04-23
1998-03-03
Skane, Christine
Compositions
Etching or brightening compositions
252 75, 252 76, 252 77, C09K 500
Patent
active
057230617
ABSTRACT:
The present invention relates to an antifreeze composition containing a water-soluble liquid alcohol and a corrosion inhibitor system comprising (a) a mixture of at least two aromatic or aliphatic dicarboxylic acids, or of at least two salts of the said acids, (b) at least one 1,3-diazole chosen from imidazole, benzimidazole, imidazoline and hydrocarbon derivatives thereof, and (c) at least one triazole compound. The aqueous fluids containing the said composition have excellent anticorrosive properties and heat stability over long periods of time, in particular when the fluids are used as heat transfer fluids at temperatures above 150.degree. C.
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Ciardi Claude
Rousselon Valerie
BP Chemicals Limited
Skane Christine
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