Surfactants derived from the reaction product of polyoxyalkylene polyols and polyglycidyl ethers and glycol-based antifreeze using same
AssigneeBASF Wyandotte Corporation
InventorsWilliam K. Langdon, Lester G. Lundsted
Life of this patent
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Abstract
A material formed by the reaction of (1) a poly-2-hydroxyalkyl derivative of a polyol having at least five hydroxyl groups, with at least three, and preferably nearly all, of said hydroxyl groups being substituted with one or more 2-hydroxyalkyl groups and (2) a polyglycidyl ether of a polyol, preferably a di- or triglycidyl ether of a polyoxyalkylene diol or triol. These materials have surfactant and defoaming abilities, and are useful in hard surface cleaning, textile and paper applications, and as defoaming agents. The compounds are especially useful as defoaming agent for glycol based antifreeze mixtures, and such antifreeze mixtures are also provided.
Claims18
A material formed by the reaction of (1) a poly-2-hydroxyalkyl derivative of a polyol having at least 5 hydroxyl groups, with at least 3 of said hydroxyl groups being substituted with 2-hydroxyalkyl groups and (2) a hydrophobic polyglycidyl ether of a polyoxyalkylene polyol said polyoxyalkylene polyol having a molecular weight greater than about 300.
An antifreeze composition comprising a glycol freezing point depressant, a corrosion inhibitor system, and a foam suppressing agent present in an amount of from about 0.001% to about 0.1% by weight of the antifreeze composition;
- said foam suppressing agent comprising the reaction product of (1) a poly-2-hydroxyalkyl derivative of a polyol having at least 5 hydroxyl groups, with at least 3 of said hydroxyl groups being substituted with one or more 2-hydroxyalkyl groups and (2) a hydrophobic polyglycidyl ether of a polyoxyalkylene polyol, said polyoxyalkylene polyol having a molecular weight greater than about 300.
Dependencies are inferred from the claim text.