use of a product which can be obtained by reacting a partial or integral quaternized derivative of an alkoxylated grease amine and method to protect a metal surface from corrosion

摘要

Use of a product obtainable by the reaction of a partial or integral quaternized derivative of an alkoxylated grease amine and method for protecting a metal surface from corrosion The present invention relates to the use of a product which may be obtained by the reaction of an amine alkoxylated grease having the formula (i) wherein r is a hydrocarbyl group having 8-24 carbon atoms; each b is independently an alkyl group having 1-4 carbon atoms, a benzyl group, or group (ao) nh, where a is an alkylene group containing 2-4 carbon atoms, preferably 2 carbon atoms; each n is at least 1 and the sum of all n is 2-30; x is 2 or 3; and y is 0-3, preferably 0 or 1; or a product obtainable by partial or total quaternization of the alkoxylated fatty amine of formula (i); with a dicarboxylic acid derivative having the formula (Iia) or (Iib) where d is -oh, -cl, or -or3, where r3 is a C1-C4 alkyl group; R2 is an alkylene radical of formula - (ch2) z-, where z is an integer from 0 to 10, preferably from 2 to 4, and more preferably 2, and wherein the alkylene radical may be substituted by 1 or 2 groups - oh; the group -ch = ch-, or the o-phenylene group; or by reacting a product (i) with a dicarboxylic acid derivative (iia) or (iib), followed by partial or total quaternization of the obtained reaction product; or by reacting a product (i) with a dicarboxylic acid derivative (iia) or (iib), followed by partial or total quaternization of the obtained reaction product, where the product consists of greater than 60% w / w oligomers / polymers with at least two alkoxylated amine units and one or more diacid / acid anhydride units and of greater than 50% w / w oligomers / polymers with at least two alkoxylated amine units and two or more diacid / acid anhydride units ; as a corrosion inhibitor for metal surfaces. The invention also relates to a method of protecting a metal surface from corrosion by contacting the metal surface with said corrosion inhibitor.