Hoechst Aktiengesellschaft

Hoechst Italia, S.p.a.

Francesco Cargnino

Horst Lorke

Giuseppe Natoli

Marco Levis

Giorgio Audisio

The use of 2-benzthiazolylthiocarboxylic acid ammonium salts of the formula ##STR1## wherein n denotes a number from 1 to 6 and M denotes an organic ammonium ion as a corrosion-inhibiting agent in aqueous functional fluids, in particular in aqueous cooling lubricants.

Aqueous anti-corrosion agent containing an ammonium salt of

Novel quaternary alkoxyalkylammonium compounds of the formula 1 ##STR1## in which R denotes C.sub.8 -C.sub.20 --, preferably C.sub.12 -C.sub.18 --, alkyl or C.sub.8 -C.sub.20 --, preferably C.sub.12 -C.sub.18 --, alkenyl, R.sub.1, R'.sub.1 and R'.sub.1, which can be identical or different, denote methyl, ethyl or benzyl and at least one of the radicals R.sub.1, R'.sub.1 and R'.sub.1 denotes a group of the formula --(C.sub.S H.sub.2S O).sub.x H,

Method for dyeing of fibers in the presence of quaternary

The invention relates to novel compounds which are particularly suitable as corrosion inhibitors for aqueous liquids for the cleaning of metals, and especially as corrosion inhibitors for oil-free aqueous liquids used for the working of metals, in particular those exposed to corrosion. The compounds according to the invention correspond to the formula ##STR1## The invention also relates to a process for their preparation.

Corrosion inhibitors for aqueous liquids for the working of metals, and

Aqueous, alkaline, zinc-containing plating bath contains as complexing and equalizing agent a reaction product of phosphoric acid or polyphosphoric acid with a compound of the formula ##STR1## in which R represents methyl, ethyl, hydroxyethyl or hydrogen,

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Venaria, Italy

Francesco Cargnino