# US 2001/0023934 A1 · Lubricants > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2001/0023934 A1 - Document ID: US20010023934A1 - Status: Published application - Kind: A1 - Application number: 09/791,628 - Filed: 2001-02-26 - Published: 2001-09-27 - Earliest claimed: 1991-10-11 - Assignees: Imperial Chemical Industries PLC - Inventors: Stuart Corr - Web page: https://patentgrep.com/patent/US20010023934A1 ## CPC - C09K 5/045: {containing only fluorine as halogen} - C10M 171/008: {Lubricant compositions compatible with refrigerants} - C09K 2205/22: All components of a mixture being fluoro compounds - C10M 2207/281: of (cyclo)aliphatic monocarboxylic acids - C10M 2207/282: of (cyclo)aliphatic oolycarboxylic acids - C10M 2207/283: of polyhydroxy compounds - C10M 2207/286: of polymerised unsaturated acids - C10M 2209/104: of alkylene oxides containing two carbon atoms only - C10M 2209/105: of alkylene oxides containing three carbon atoms only - C10M 2209/107: of two or more specified different alkylene oxides covered by groups C10M2209/104 - C10M2209/106 - C10M 2211/022: aliphatic - C10M 2211/06: Perfluorinated compounds - C10N 2020/01: {Physico-chemical properties} - C10N 2040/00: Specified use or application for which the lubricating composition is intended - C10N 2040/30: Refrigerators lubricants {or compressors lubricants} - C10N 2040/32: Wires, ropes or cables lubricants - C10N 2040/34: Lubricating-sealants - C10N 2040/36: Release agents {or mold release agents} - C10N 2040/38: {Conveyors or chain belts} - C10N 2040/40: {Generators or electric motors in oil or gas winning field} - C10N 2040/42: {Flashing oils or marking oils} - C10N 2040/44: {Super vacuum or supercritical use} - C10N 2040/50: {Medical uses} - C09K: MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE - 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 working fluid composition comprising: (A) a heat transfer fluid comprising a mixture of at least two compounds selected from the group consisting of hydrofluoroalkanes and fluoroalkanes; and (B) sufficient to provide lubrication of a lubricant which is at least partially soluble in each component of the heat transfer fluid. ## Claims ### Claim 1 A working fluid composition comprising: (A) a heat transfer fluid comprising a mixture of at least two compounds selected from the group consisting of hydrofluoroalkanes and fluoroalkanes; and (B) sufficient to provide lubrication of a lubricant which is at least partially soluble in each component of the heat transfer fluid. ### Claim 2 (depends on 1) A working fluid composition as claimed in claim 1 wherein the heat transfer fluid (A) comprises at least two hydrofluoroalkanes selected from the group consisting of difluoromethane, 1,1,2,2-tetrafluoroethane, 1,1,1,2-tetrafluoroethane, pentafluoroethane, 1,1-difluoroethane, 1,1,1-trifluoroethane and 1,1,2-trifluoroethane. ### Claim 3 (depends on 1, 2) A working fluid composition as claimed in claim 1 or claim 2 wherein the heat transfer fluid (A) comprises a mixture of: (1) tetrafluoroethane; (2) at least one hydrofluoroalkane selected from the group consisting of difluoromethane and 1,1,1-trifluoroethane; and optionally (3) pentafluoroethane. ### Claim 4 (depends on 3) A working fluid composition as claimed in claim 3 wherein the tetrafluoroethane is 1,1,1,2-tetrafluoroethane. ### Claim 5 (depends on 4) A working fluid composition as claimed in claim 4 wherein the heat transfer fluid (A) is a binary mixture consisting essentially of 1,1,1,2-tetrafluoroethane and difluoromethane. ### Claim 6 (depends on 1, 2, 3) A working fluid composition as claimed in any one of claims 1 to 3 wherein the heat transfer fluid (A) comprises a ternary or higher mixture of: (1) 1,1,1,2-tetrafluoroethane or 1,1,2,2-tetrafluoroethane; (2) at least one hydrofluoroalkane selected from the group consisting of difluoromethane and 1,1,1-trifluoroethane; and optionally (3) pentafluoroethane. ### Claim 7 (depends on 6) A working fluid composition as claimed in claim 6 wherein the heat transfer fluid (A) comprises a mixture of: (1) 1,1,1,2-tetrafluoroethane or 1,1,2,2-tetrafluoroethane; (2) difluoromethane or 1,1,1-trifluoroethane; and (3) pentafluoroethane. ### Claim 8 (depends on 7) A working fluid composition as claimed in claim 7 wherein the heat transfer fluid (A) comprises a mixture of: (1) 1,1,1,2-tetrafluoroethane; (2) difluoromethane; and (3) pentafluoroethane. ### Claim 9 A working fluid composition as claimed in any one of the preceding claims wherein the lubricant (B) comprises at least one polyoxyalkylene glycol. ### Claim 10 (depends on 9) A working fluid composition as claimed in claim 9 wherein the lubricant (B) comprises at least one polyoxyalkylene glycol having the general formula: A[—O—(CH2CH(CH3)O)1(CH2CH2O)m-Q]x I wherein A is the residue remaining after removing the hydroxyl groups from a hydroxyl containing organic compound; Q represents an optionally substituted alkyl, aralkyl or aryl group; l and m are independently 0 or an integer provided that at least one of l or m is an integer; and x is an integer, said at least one polyoxyalkylene glycol having an average molecular weight in the range of from about 150 to about 3000. ### Claim 11 (depends on 1, 2, 3, 4, 5, 6, 7, 8) A working fluid composition as claimed in any one of claims 1 to 8 wherein the lubricant (B) comprises at least one neopentyl polyol ester. ### Claim 12 (depends on 11) A working fluid composition as claimed in claim 11 wherein the lubricant (B) comprises at least one neopentyl polyol ester selected from the esters of pentaerythritol, dipentaerythritol, tripentaerythritol, trimethylol ethane, trimethylol propane and neopentyl glycol. ### Claim 13 (depends on 11, 12) A working fluid composition as claimed in claim 11 or claim 12 wherein the lubricant (B) comprises one or more compounds of general formula: 3 wherein R is the hydrocarbon radical remaining after removing the hydroxyl groups from pentaerythritol, dipentaerythritol, tripentaerythritol, trimethylol ethane, trimethylol propane or neopentyl glycol, or the hydroxyl containing hydrocarbon radical remaining after removing a proportion of the hydroxyl groups from pentaerythritol, dipentaerythritol, tripentaerythritol, trimethylol ethane, trimethylol propane or neopentyl glycol; each R1 is, independently, H, a straight chain (linear) aliphatic hydrocarbyl group, a branched aliphatic hydrocarbyl group, or an aliphatic hydrocarbyl group (linear or branched) containing a carboxylic acid or carboxylic acid ester substituent, provided that at least one R1 group is a linear aliphatic hydrocarbyl group or a branched aliphatic hydrocarbyl group; and n is an integer. ### Claim 14 (depends on 13) A working fluid composition as claimed in claim 13 wherein the linear and branched hydrocarbyl groups specified for R1 are unsubstituted and the carboxylic acid or carboxylic acid ester containing hydrocarbyl group specified for R1 contains no other substituents. ### Claim 15 (depends on 13, 14) A working fluid composition as claimed in claim 13 or claim 14 wherein the lubricant (B) comprises one or more compounds of Formula II in which R is the hydrocarbon radical remaining after removing the hydroxyl groups from pentaerythritol, dipentaerythritol, tripentaerythritol, trimethylol ethane, trimethylol propane or neopentyl glycol. ### Claim 16 (depends on 15) A working fluid composition as claimed in claim 15 wherein the lubricant (B) comprises one or more compounds of Formula II in which R is the hydrocarbon radical remaining after removing the hydroxyl groups from pentaerythritol, dipentaerythritol, trimethylol propane or neopentyl glycol. ### Claim 17 (depends on 16) A working fluid composition as claimed in claim 16 wherein the lubricant (B) comprises one or more compounds of Formula II in which R is the hydrocarbon radical remaining after removing the hydroxyl groups from pentaerythritol, dipentaerythritol or trimethylol propane. ### Claim 18 (depends on 13, 14, 15, 16, 17) A working fluid composition as claimed in any one of claims 13 to 17 wherein the lubricant (B) comprises one or more compounds of Formula II in which each R1 is, independently, a linear alkyl group or a branched alkyl group. ### Claim 19 (depends on 18) A working fluid composition as claimed in claim 18 wherein the lubricant (B) comprises one or more compounds of Formula II in which each R1 is, independently, a C5-8 linear alkyl group or a C8-10 branched alkyl group. ### Claim 20 (depends on 18, 19) A working fluid composition as claimed in claim 18 or claim 19 wherein at least one R1 group is a linear alkyl group. ### Claim 21 (depends on 18, 19, 20) A working fluid composition as claimed in any one of claims 18 to 20 wherein at least one R1 group is a linear alkyl group and at least one R1 group is a branched alkyl group. ### Claim 22 (depends on 11, 12) A working fluid composition as claimed in claim 11 of claim 12 wherein the lubricant (B) comprises one or more esters of general formula: 4 wherein R2 is the hydrocarbon radical remaining after removing the hydroxyl groups from pentaerythritol, dipentaerythritol or trimethylol propane; each R3 is, independently, a linear alkyl group or a branched alkyl group; and p is an integer of 3, 4 or 6, wherein one or more of the named polyols, one or more linear alkanoic acids, or esterifiable derivatives thereof, and optionally one or more branched alkanoic acids, or esterifiable derivatives thereof, are utilised in the synthesis of the ester. ### Claim 23 (depends on 22) A working fluid composition as claimed in claim 22 wherein a mixture of one or more linear alkanoic acids, or esterifiable derivatives thereof, and one or more branched alkanoic acids, or esterifiable derivatives thereof, are utilised in the synthesis of the ester. ### Claim 24 (depends on 22, 23) A working fluid composition as claimed in claim 22 or claim 23 wherein the lubricant comprises one or more compounds of Formula III in which R2 is the hydrocarbon radical remaining after removing the hydroxyl groups from pentaerythritol or dipentaerythritol. ### Claim 25 (depends on 22, 23, 24) A working fluid composition as claimed in any one of claims 22 to 24 wherein the lubricant (B) comprises one or more compounds of Formula III in which each R3 is, independently, a C5-8 linear alkyl group or a C8-10 branched alkyl group. ### Claim 26 (depends on 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25) The use of the working fluid composition claimed in any one of claims 1 to 25 in a heat transfer device. ### Claim 27 (depends on 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25) A heat transfer device containing the working fluid composition claimed in any one of claims 1 to 25.