# US 5,329,055 A · Method of suppressing mist formation from oil-containing functional fluids > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 5,329,055 A - Document ID: US5329055A - Status: Granted - Kind: A - Application number: 08/061,899 - Filed: 1993-05-14 - Granted: 1994-07-12 - Earliest claimed: 1991-06-19 - Assignees: Exxon Chemical Patents Inc. - Inventors: Harold E. Bachman; Chung K. Shih - Web page: https://patentgrep.com/patent/US5329055A ## CPC - C10M 143/00: Lubricating compositions characterised by the additive being a macromolecular hydrocarbon or such hydrocarbon modified by oxidation - C10M 143/04: containing propene - C10M 143/06: containing butene - C10M 143/08: containing aliphatic monomer having more than 4 carbon atoms - C10M 171/00: Lubricating compositions characterised by purely physical criteria, e.g. containing as base-material, thickener or additive, ingredients which are characterised exclusively by their numerically specified physical properties, i.e. containing ingredients which are physically well-defined but for which the chemical nature is either unspecified or only very vaguely indicated (chemically defined ingredients C10M101/00 - C10M169/00; petroleum fractions C10M101/02, C10M121/02, C10M159/04) - C10M 2205/00: Organic macromolecular hydrocarbon compounds or fractions, whether or not modified by oxidation as ingredients in lubricant compositions - C10M 2205/02: containing acyclic monomers - C10M 2205/024: Propene - C10M 2205/026: Butene - C10M 2205/028: containing aliphatic monomers having more than four carbon atoms - 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} - 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 There is disclosed a method of suppressing misting or spatting from an oil-containing functional fluid, such as a chain saw lubricant, by blending with the functional fluid a mist suppressing effective amount of a copolymer of a C.sub.3 or C.sub.4 alpha-monoolefin and at least one other alpha-monoolefin having from 5 to about 20 carbon atoms, said copolymer having a viscosity average molecular weight of from about 500,000 to about 10 million. ## Claims ### Claim 1 In a process for suppressing mist formation from a single use lubricating oil, the improvement which comprises: admixing with the lubricating oil from about 0.0001 to 0.04 weight percent of a copolymer prepared by copolymerizing at least one alpha-monoolefin selected from propylene and butene-1 with at least one additional alpha-monoolefin having from 5 to about 20 carbon atoms, said copolymer having a viscosity average molecular weight of from about 100,000 to about 20 million. ### Claim 2 (depends on 1) The process of claim 1, wherein said copolymer is prepared by copolymerizing butene-1 with at least one additional alpha-monoolefin having from 6 to 14 carbon atoms. ### Claim 3 (depends on 2) The process of claim 2, wherein said additional monoolefin is selected from the group consisting of hexene-1, octene-1, decene-1, dodecene-1, tetradecene-1 and mixtures thereof. ### Claim 4 (depends on 3) The process of claim 3, wherein said additional monoolefin is dodecene-1. ### Claim 5 (depends on 1) The process of claim 1, wherein said copolymer comprises from about 10 to about 90 mole percent C.sub.3 or C.sub.4 monoolefin-derived units and from about 90 to about 10 mole percent of units derived from C.sub.5 -C.sub.20 monoolefin. ### Claim 6 (depends on 5) The process of claim 5, wherein said copolymer comprises from about 25 to about 75 mole percent C.sub.3 or C.sub.4 monoolefin-derived units and from about 75 to about 25 mole percent of units derived from C.sub.5 -C.sub.20 monoolefin. ### Claim 7 (depends on 1) The process of claim 1, wherein said copolymer comprises from about 10 to about 90 mole percent butene-1-derived units and from about 90 to about 10 mole percent of units derived from C.sub.6 to C.sub.14 monoolefin. ### Claim 8 (depends on 7) The process of claim 7, wherein said butene-1-derived units comprise from about 25 to about 75 mole percent of said copolymer. ### Claim 9 (depends on 1, 2, 3, 4, 5, 6, 7, 8) The process of anyone of claims 1 to 8 wherein said copolymer has a viscosity average molecular weight of from about 500,000 to about 10 million. ### Claim 10 In a process for lubricating a chain saw with an oil of lubricating viscosity, the improvement which comprises: admixing with the oil of lubricating viscosity from about 0.0001 to 0.04 weight percent of a copolymer prepared by copolymerizing at least one alpha-monoolefin selected from propylene and butene-1 with at least one additional alpha-monoolefin having from 5 to about 20 carbon atoms, said copolymer having a viscosity average molecular weight of from about 100,000 to about 20 million. ### Claim 11 A single use lubricating oil which comprises: (a) a major amount of an oil lubricating viscosity, and (b) from about 0.0001 to 0.04 weight percent of a copolymer prepared by copolymerizing at least one alpha-monoolefin selected from propylene and butene-1 with at least one additional alpha-monoolefin having from 5 to about 20 carbon atoms, said copolymer having a viscosity average molecular weight of from about 100,000 to about 20 million. ### Claim 12 (depends on 11) The oil of claim 11, wherein said copolymer is prepared by copolymerizing butene-1 with at least one additional alpha-monoolefin having from 6 to 14 carbon atoms. ### Claim 13 (depends on 12) The oil of claim 12, wherein said additional monoolefin is selected from the group consisting of hexene-1, octene-1, decene-1, dodecene-1, tetradecene-1, and mixtures thereof. ### Claim 14 (depends on 13) The oil of claim 13, wherein said additional monoolefin is dodecene-1. ### Claim 15 (depends on 11) The oil of claim 11, wherein said copolymer comprises from about 10 to about 90 mole percent C.sub.3 or C.sub.4 monoolefin-derived units and from about 90 to about 10 mole percent of units derived from C.sub.5 -C.sub.20 monoolefin. ### Claim 16 (depends on 15) The oil of claim 15, wherein said copolymer comprises from about 25 to about 75 mole percent C.sub.3 or C.sub.4 monoolefin-derived units and from about 75 to about 25 mole percent of units derived from C.sub.5 -C.sub.20 monoolefin. ### Claim 17 (depends on 11) The oil of claim 11, wherein said copolymer comprises from about 10 to about 90 mole percent butene-1-derived units and from about 90 to about 10 mole percent of units derived from C.sub.6 to C.sub.14 monolefin. ### Claim 18 (depends on 17) The oil of claim 17, wherein said butene-1-derived units comprise from about 25 to about 75 mole percent of said copolymer. ### Claim 19 (depends on 11) The oil of claim 11, which further contains an effective amount of at least one additional additive selected from the group consisting of (i) rust inhibitors, (ii) anti-oxidants, (iii) pour point depressants, and (iv) anti-wear agents. ### Claim 20 (depends on 19) The oil of claim 19, wherein the oil contains from about 0.005 to about 0.04 weight percent of the copolymer.