Partial esters of hydroxy polycarboxylic acids

Details Partial esters of hydroxy polycarboxylic acids Partial esters of hydroxy polycarboxylic acids

1974-03-29

1976-04-06

Weinberger, Lorraine A.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C-metal

252 82, 252396, 260484R, C07C 6970

Patent

active

039489760

ABSTRACT:
Partial esters of hydroxy-polycarboxylic acids having at least one unesterified carboxyl group and at least one other carboxyl group esterified with an alcohol having one to 20 repeating oxyalkylene groups and a terminal hydrocarbon radical are useful as additives for inhibiting corrosion and scale on metal parts in a circulating water system. Especially suitable for the use are alkyl polyoxyethylene alcohol partial esters of citric, malic and tartaric acids. Preparation and use of several preferred partial esters of the class are detailed.

REFERENCES:
patent: 2602065 (1952-07-01), De Groote
patent: 2679520 (1954-05-01), De Groote
patent: 2723285 (1955-11-01), De Groote
patent: 3401127 (1968-09-01), Stephenson

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