Polyester polyamine and polyester polyquaternary ammonium corrosion inhibitors

摘要

The present invention relates to the use of a product obtainable by the reaction of a fatty acid, or mixture of acids, having the formula R1COOH (I); and a dicarboxylic acid or a derivative thereof having the formula (IIa) or (IIb) with an alkoxylated fatty amine having the formula (III) or a partial or wholly quaternized derivative thereof; optionally said reaction between the fatty acid, the dicarboxylic acid and the alkoxylated fatty amine is being followed by a further reaction step wherein part or all of the nitrogen atoms are quaternized by reaction with an alkylating agent R5X; as a corrosion inhibitor for metal surfaces. The present invention also relates to such products and to methods for their production.;

主权项

1. A method for protecting a metal surface from corrosion by contacting the metal surface with a product obtainable by the reaction of
a fatty acid, or mixture of acids, having the formula R1COOH (I), where R1CO is an acyl group having 8 to 24 carbon atoms, that may be saturated or unsaturated, linear or branched; and a dicarboxylic acid or a derivative thereof having the formula (IIa) or (IIb)where D is —OH, —Cl, or —OR3, where R3 is a C1-C4 alkyl group; R2 is selected from the group consisting of a direct bond, an alkylene radical of formula —(CH2)z—, in which z is an integer from 1 to 10, a substituted alkylene radical wherein said alkylene radical is substituted by 1 or 2 —OH groups, a cycloalkylene, a cycloalkenylene and/or an arylene group;
with an alkoxylated fatty amine having the formula (III)wherein R4 is a hydrocarbyl group having 8-24 carbon atoms; AO is an alkyleneoxy group containing 2-4 carbon atoms, each B is, independently, an alkyl group having 1-4 carbon atoms, or a benzyl group; each n is, independently, at least 1 and the sum of all n is 2-30; s is 2 or 3; and y is 0 or 1; or of a product obtainable by partial or total quaternisation of the alkoxylated fatty amine of formula (III).