# US 5,707,945 A · Base fluids > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 5,707,945 A - Document ID: US5707945A - Status: Granted - Kind: A - Application number: 08/612,897 - Filed: 1996-03-05 - Granted: 1998-01-13 - Earliest claimed: 1993-09-14 - Assignees: Unichema Chemie B. V. - Inventors: Nigel Andrew John Cooban; Hendrik Leendert Rieffe - Web page: https://patentgrep.com/patent/US5707945A ## CPC - C10M 109/02: Reaction products - C10M 105/18: Ethers, e.g. epoxides - C10M 105/36: of polycarboxylic acids - C10M 105/40: containing free hydroxy or carboxyl groups - C10M 107/34: Polyoxyalkylenes - C10M 173/02: not containing mineral or fatty oils - C10M 2201/02: Water - C10M 2205/223: used as base material - C10M 2207/0406: used as base material - C10M 2207/2825: used as base material - C10M 2207/2855: used as base material - C10M 2207/2875: used as base material - C10M 2207/2885: used as base material - C10M 2207/2895: used as base material - C10M 2209/103: Polyethers, i.e. containing di- or higher polyoxyalkylene groups - C10M 2209/1033: used as base material - C10M 2209/104: of alkylene oxides containing two carbon atoms only - C10M 2209/1045: used as base material - C10M 2209/105: of alkylene oxides containing three carbon atoms only - C10M 2209/1055: used as base material - C10M 2209/106: of alkylene oxides containing four carbon atoms only - C10M 2209/1065: used as base material - C10M 2209/107: of two or more specified different alkylene oxides covered by groups C10M2209/104 - C10M2209/106 - C10M 2209/1075: used as base material - C10M 2209/1085: used as base material - C10M 2209/1095: used as base material - C10N 2040/06: Instruments or other precision apparatus, e.g. damping fluids - C10N 2040/20: Metal working - C10N 2040/22: with essential removal of material {, e.g. cutting, grinding or drilling} - C10N 2040/24: without essential removal of material {, e.g. forming, gorging, drawing, pressing, stamping, rolling or extruding}; Punching metal - C10N 2040/241: {Manufacturing joint-less pipes} - C10N 2040/242: {Hot working} - C10N 2040/243: {Cold working} - C10N 2040/244: {of specific metals} - C10N 2040/245: {Soft metals, e.g. aluminum} - C10N 2040/246: {Iron or steel} - C10N 2040/247: {Stainless steel} - C10N 2050/01: {Emulsions, colloids, or micelles} - C10N 2070/02: {Concentrating of additives} - C10M: LUBRICATING COMPOSITIONS (well drilling compositions C09K8/02); USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION (mould release, i.e. separating, agents for metals B22C3/00, for plastics or substances in a plastic state, in general B29C33/56, for glass C03B40/02; textile lubricating compositions D06M11/00, D06M13/00, D06M15/00; immersion oils for microscopy G02B21/33) - C10N: INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS ## Abstract A base fluid for hydraulic or metal working fluids comprises the esterification product having a hydroxyl number below 15 and an acid number below 10 of polymerized fatty acids and a monohydric alkoxylated alcohol, selected from (a) straight or branched chain saturated monohydric C.sub.1 -C.sub.24 alcohols, alkoxylated with 2-25 moles of C.sub.2 -C.sub.5 alkylene oxide and (b) alkoxy poly(alkylene) glycol etherified with C.sub.1 -C.sub.4 aliphatic monohydric alcohol and which is alkoxylated with 2-25 moles of C.sub.2 -C.sub.5 alkylene oxide, optionally the alcohol component also comprises (c) a straight or branched chain C.sub.1 -C.sub.24 aliphatic monohydric alcohol. The acid number of the crude ester is preferably reduced by reacting it with a glycidyl ester of a C.sub.5 -C.sub.22 aliphatic monocarboxylic acid, preferably a C.sub.6 -C.sub.12 branched chain, aliphatic monocarboxylic acid. ## Claims ### Claim 1 A hydraulic fluid comprising a base fluid and one or more functional additives, characterized in that the hydraulic fluid comprises, based on total hydraulic fluid, from 10% by weight to 95% by weight of a base fluid comprising an esterification product, having an acid number below 10 and a hydroxyl number below 15, obtained by esterification of: (a) a polymerized unsaturated C.sub.12 -C.sub.24 fatty acid selected from the group consisting of dimer acid, trimer acid, hydrogenated dimer acid, hydrogenated trimer acid, and mixtures thereof; and (b) a monohydric alkoxylated alcohol selected from the group consisting of: (1) straight or branched chain, saturated monohydric alcohols having from 1 to 24 carbon atoms, which are alkoxylated with from 6 to 12 moles of a C.sub.2 -C.sub.5 alkylene oxide, and (2) alkoxy poly(alkylene) glycols in which one of the two terminal hydroxyl groups is etherified with a C.sub.1 -C.sub.4 aliphatic monohydric alcohol and which is alkoxylated with from 6 to 12 moles of a C.sub.2 -C.sub.5 alkylene oxide, and optionally, (c) a straight or branched chain, saturated monohydric alcohol having from 1 to 24 carbon atoms, until the acid number of the ester is below 10 and the hydroxyl number is below 15. ### Claim 2 (depends on 1) A hydraulic fluid according to claim 1 in which (b) of the base fluid has an average molecular weight of 200 to 2000. ### Claim 3 (depends on 2) A hydraulic fluid according to claim 2 in which (b) of the base fluid has an average molecular weight to 300 to 1000. ### Claim 4 (depends on 1) A hydraulic fluid according to claim 1 in which (c) in the base fluid comprises from 1 to 14 carbon atoms. ### Claim 5 (depends on 1) A hydraulic fluid according to claim 1 in which the esterification product of the base fluid has an acid number of at most 5 and a hydroxyl number of at most 10. ### Claim 6 (depends on 1) A hydraulic fluid according to claim 1 in which the esterification product of the base fluid has an acid number of less than 1. ### Claim 7 (depends on 1) A hydraulic fluid according to claim 1, comprising from 20% to 75% by weight of the base fluid. ### Claim 8 A metal working concentrate which comprises, based on total metal working concentrate, from 5% by weight to 95% by weight of a base fluid comprising an esterification product, having an acid number below 10 and a hydroxyl number below 15, obtained by esterification of: (a) a polymerized unsaturated C.sub.12 -C.sub.24 fatty acid selected from the group consisting of dimer acid, trimer acid, hydrogenated dimer acid, hydrogenated trimer acid, and mixtures thereof; and (a) a monohydric alkoxylated alcohol selected from the group consisting of: (1) straight or branched chain, saturated monohydric alcohols having from 1 to 24 carbon atoms, which are alkoxylated with from 6 to 12 moles of a C.sub.2 -C.sub.5 alkylene oxide, and (2) alkoxy poly(alkylene) glycols in which one of the two terminal hydroxyl groups is etherified with a C.sub.1 -C.sub.4 aliphatic monohydric alcohol and which is alkoxylated with from 6 to 12 moles of a C.sub.2 -C.sub.5 alkylene oxide, and optionally, (c) a straight or branched chain, saturated monohydric alcohol having from 1 to 24 carbon atoms, until the acid number of the ester is below 10 and the hydroxyl number is below 15. ### Claim 9 (depends on 8) A metal working fluid according to claim 8 in which (b) of the base fluid has an average molecular weight of 200 to 2000. ### Claim 10 (depends on 9) A metal working fluid according to claim 9 in which (b) of the base fluid has an average molecular weight of 300 to 1000. ### Claim 11 (depends on 8) A hydraulic fluid according to claim 8 in which (c) in the base fluid comprises from 1 to 14 carbon atoms. ### Claim 12 (depends on 8) A hydraulic fluid according to claim 8 in which the esterification product of the base fluid has an acid number of at most 5 and a hydroxyl number of at most 10. ### Claim 13 (depends on 8) A hydraulic fluid according to claim 8 in which the esterification product of the base fluid has an acid number of less than 1. ### Claim 14 (depends on 8) A hydraulic fluid according to claim 8 which comprises from 20% by weight to 70% by weight of the base fluid. ### Claim 15 (depends on 8) A metal working water and oil emulsion which comprises from 1% to 10% by weight of the metal working concentrate of claim 8.