US 12,187,974 B2
Oil-based corrosion inhibitors
Ryan Weber, Solon, OH (US); Samantha Lauro, Austin, TX (US); Christina Brancel, Painesville, OH (US); Britt Minch, Painesville, OH (US); Eric Rodeheaver, Montville Township, OH (US); and Nicholas S. Pottschmidt, Medina, OH (US)
Assigned to The Lubrizol Corporation, Wickliffe, OH (US)
Appl. No. 17/910,576
Filed by The Lubrizol Corporation, Wickliffe, OH (US)
PCT Filed Feb. 2, 2021, PCT No. PCT/US2021/016169
§ 371(c)(1), (2) Date Sep. 9, 2022,
PCT Pub. No. WO2021/183230, PCT Pub. Date Sep. 16, 2021.
Claims priority of provisional application 62/988,460, filed on Mar. 12, 2020.
Prior Publication US 2023/0151294 A1, May 18, 2023
Int. Cl. C10M 163/00 (2006.01); C10M 129/56 (2006.01); C10N 10/02 (2006.01); C10N 10/04 (2006.01); C10N 30/12 (2006.01)
CPC C10M 163/00 (2013.01) [C10M 129/56 (2013.01); C10M 2207/126 (2013.01); C10M 2207/127 (2013.01); C10M 2207/129 (2013.01); C10M 2219/044 (2013.01); C10N 2010/02 (2013.01); C10N 2010/04 (2013.01); C10N 2030/12 (2013.01)] 11 Claims
 
1. A composition comprising:
a) from greater than 20 to about 40 percent by weight of an overbased calcium sulfonate detergent; and
b) an acid mixture comprising at least two carboxylic acids and at least one hydrocarbyl-substituted organic sulfonic acid that is a mono or di substituted alkylsulfonic acid,
i. wherein at least one of the carboxylic acids is a C8 to C36 hydrocarbyl-substituted polycarboxylic acid wherein the carboxylic groups are separated by 10 to 20 carbon atoms and at least one of the carboxylic acids is a linear or branched C10 to C18 hydrocarbyl-substituted monocarboxylic acid, wherein the weight ratio of the polycarboxylic acid to the monocarboxylic acid ranges from 3:1 to 1:1, and
ii. wherein the weight ratio of the at least one hydrocarbyl-substituted organic sulfonic acid to the at least two carboxylic acids ranges from 15:1 to 3:1,
wherein the weight ratio of a) the overbased calcium sulfonate detergent to b) the acid mixture ranges from 2:1 to 1:3; and
wherein the total base number (“TBN”) of the composition ranges from at least 10 to 65 mg KOH/g.