ALKALINE-EARTH METAL SALTS, TRANSITION METAL SALTS OR TRANSITION METAL COMPLEXES OF KETOCARBOXYLIC ACIDS, METHOD OF PREPARATION THEREOF, COMPOSITION FOR COATINGS AND METHOD FOR PROTECTION OF CORRODING SUBSTRATE Russian patent published in 1999 - IPC

FIELD: chemical industry. SUBSTANCE: present invention describes alkaline-earth metal salts, transition metal salts or transition metal complexes and compounds of formula (I): wherein R₁ is hydrogen; R₂-R₅ are independently hydrogen, chlorine, bromine or C₁-C₈-alkyl; n is 2, provided that 3-(chloro-4-isopropylbenzoyl) propionic acid calcium salt is not present. Metals include calcium, titanium, manganese, iron, cobalt, zinc, yttrium, zirconium, lanthanum or cerium. Method of preparing salts of complexes comprises reacting ketocarboxylic acid of formula (I) or alkali metal salts thereof with alkaline-earth metal compound or transition metal compound. Composition for coatings comprises binding agent and corrosion inhibitor. Method for protecting corroding metal substrate comprises applying composition for coatings onto substrate. EFFECT: more efficient preparation and protection methods. 17 cl, 18 ex, 10 tbl