Use of a secondary amine as a corrosion inhibiting and antimicrobial agent and an aqueous alkaline industrial fluid containing said amine
AssigneesBerol Nobel AB, Castrol Limited
InventorsRolf Skold, Patrick J. Ruane
Life of this patent
Estimating the term…
Abstract
Secondary amines having the formula (I): R(Y).sub.s NHX, in which R is a hydrocarbon group having 2-12 carbon atoms, Y is the group --CH(OH)CH.sub.2 --, --OCH.sub.2 CH(OH)CH.sub.2 -- or --O(CH.sub.2).sub.3, X is an alkyl group having 2-3 carbon atoms and substituted with hydroxyl groups in the 2-position or in the 2 - and 3-positions, and s is 0 or 1 with the condition that when s is 0, then X is an alkyl group substituted in the 2- and 3-positions, or a salt thereof, are used as anticorrosion and antimicrobial agents. They are suitable to be incorporated in aqueous, alkaline, industrial fluids. An aqueous, alkaline metal working fluid is also disclosed.
Claims13
A process for providing a composition with a corrosion inhibiting and antimicrobial agent, comprising:
- incorporating into the composition an effective amount of a corrosion inhibiting and antimicrobial agent comprised of a secondary amine having a formula:
- R(Y).sub.s NHX (I),
- wherein:
- R is an hydrocarbon group having 2-12 carbon atoms,
- Y is a group selected from the group consisting of --CH(OH)CH.sub.2 --, --OCH.sub.2 CH(OH)CH.sub.2 --, and --O(CH.sub.2).sub.3 --,
- X is an alkyl group having 2-3 carbon atoms and being substituted by hydroxyl groups in one of the 2-position or the 2- and 3-positions, and
- s is 0 or 1 provided that when s is 0, then X is one of an alkyl group substituted in the 2- and 3-positions or a salt thereof.
An aqueous alkaline metal working fluid which has a pH value of at least 8, comprising:
- from 0.001 to 10% by weight of a secondary amine having a formula:
- R(Y).sub.s NHX (I),
- wherein;
- R is an hydrocarbon group having 2-12 carbon atoms,
- Y is a group selected from the group consisting of --CH(OH)CH.sub.2 --, --OCH.sub.2 CH(OH)CH.sub.2 --, and --O(CH.sub.2).sub.3 --,
- X is an alkyl group having 2-3 carbon atoms and being substituted with hydroxyl groups in one of the 2-position or the 2- and 3-positions, and
- s is 0 or 1 provided that when s is 0, then X is one of an alkyl group substituted in the 2- and 3-positions or a salt thereof.
A solution containing the aqueous alkaline metal working fluid in accordance with claim 18, wherein s in the formula of the secondary amine is 1.
Dependencies are inferred from the claim text.