Alkenylsuccinic acid half-amides as anticorrosion agents
AssigneeHoechst Aktiengesellschaft
InventorsWerner Ritschel, Horst Lorke
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Abstract
The use, as anticorrosion agents, of alkenylsuccinic acid half-amides of the formulae ##STR1## in which R denotes C.sub.6 -C.sub.12 -alkenyl and M denotes a proton or an ammonium ion of the formula NHR.sub.1 R.sub.2 R.sub.3 and R.sub.1, R.sub.2 and R.sub.3 are identical or different and denote hydrogen, C.sub.1 -C.sub.12 -alkyl, 2-hydroxyethyl or 2-hydroxypropyl.
Claims1
Aqueous cooling lubricants containing 0.1 to 10% by weight of an alkenylsuccinic acid half amide of the formula ##STR4## in which R denotes C.sub.6 -C.sub.12 -alkenyl and M denotes a proton or an ammonium ion of the formula NHR.sub.1 R.sub.2 R.sub.3 and R.sub.1, R.sub.2 and R.sub.3 are identical or different and denote hydrogen, C.sub.1 -C.sub.12 -alkyl, 2-hydroxyethyl or 2-hydroxypropyl said half amide obtained by reacting 1 mole of an alkenylsuccinic anhydride of the formula ##STR5## with at least two moles of ammonia at a temperature of from 0.degree. to 5.degree. C. and converting the ammonium salt thus obtained into different salts under the meaning of M.sup..sym. if M.sup..sym. does not represent an ammonium ion and at a pH of a 1 percent solution in distilled water.
Dependencies are inferred from the claim text.