# US 5,345,024 A · Alpha-olefin polymers > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 5,345,024 A - Document ID: US5345024A - Status: Granted - Kind: A - Application number: 07/563,477 - Filed: 1990-08-06 - Granted: 1994-09-06 - Earliest claimed: 1987-12-29 - Assignees: The Lubrizol Corporation - Inventors: Curtis R. Scharf - Web page: https://patentgrep.com/patent/US5345024A ## CPC - C10M 143/06: containing butene - C08F 10/00: Homopolymers and copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond - C10M 137/10: Thio derivatives - C10M 143/08: containing aliphatic monomer having more than 4 carbon atoms - C10M 161/00: Lubricating compositions characterised by the additive being a mixture of a macromolecular compound and a non-macromolecular compound, each of these compounds being essential - C10M 2205/00: Organic macromolecular hydrocarbon compounds or fractions, whether or not modified by oxidation as ingredients in lubricant compositions - C10M 2205/026: Butene - C10M 2205/028: containing aliphatic monomers having more than four carbon atoms - C10M 2207/125: having hydrocarbon chains of eight up to twenty-nine carbon atoms, i.e. fatty acids - C10M 2207/129: having hydrocarbon chains of thirty or more carbon atoms - C10M 2223/045: Metal containing thio derivatives - C10N 2010/00: Metal present as such or in compounds - C10N 2010/02: Groups 1 or 11 - C10N 2010/04: Groups 2 or 12 - C10N 2020/01: {Physico-chemical properties} - C10N 2040/02: Bearings - C10N 2040/06: Instruments or other precision apparatus, e.g. damping fluids - C10N 2040/08: Hydraulic fluids, e.g. brake-fluids - C10N 2040/25: Internal-combustion engines - C10N 2040/251: {Alcohol-fuelled engines} - C10N 2040/255: {Gasoline engines} - C10N 2040/28: Rotary {engines} - 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) - C08F: MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS - C10N: INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS ## Abstract This invention deals with viscosity improvers which are obtained through the use of a mixed catalyst system comprising a tertiary organo halide and a Lewis acid catalyst. ## Claims ### Claim 1 A process for preparing a liquid alpha-olefin polymer comprising contacting at least one alpha-olefin with a catalyst system comprising a tertiary organo halide and a Lewis acid catalyst under polymerization conditions thereby obtaining the alpha-olefin polymer wherein the alpha-olefin polymer has a polymodal distribution with peak molecular weight maximums at 2,000 to 5,000 and at 50,000 to 75,000 wherein the organo is hydrocarbyl. ### Claim 2 (depends on 1) The process of claim 1 wherein the alpha-olefin contains from 4 to about 30 carbon atoms. ### Claim 3 (depends on 1) The process of claim 1 wherein the tertiary organo halide is a tertiary-alkyl halide, ### Claim 4 (depends on 1) The process of claim 1 wherein the Lewis acid catalyst is an aluminum halide. ### Claim 5 (depends on 1) The process of claim 1 which is conducted at about -20.degree. C. to about 40.degree. C. ### Claim 6 (depends on 1) The process of claim 1 wherein the alpha-olefin polymer is a copolymer. ### Claim 7 (depends on 3) The process of claim 3 wherein the tertiary alkyl halide contains from 4 to about 12 carbon atoms in the alkyl group. ### Claim 8 (depends on 4) The process of claim 4 wherein the Lewis acid catalyst is aluminum chloride. ### Claim 9 (depends on 1) The process of claim 1 wherein the alpha-olefin polymer is a liquid. ### Claim 10 (depends on 1) The process of claim 1 wherein the alpha-olefin polymer is a homopolymer. ### Claim 11 (depends on 2) The process of claim 2 wherein the alpha-olefin is about C.sub.6 to about C.sub.16. ### Claim 12 (depends on 7) The process of claim 7 wherein the tertiary-alkyl halide is selected from the group consisting of tertiary-amyl and tertiary-butyl halides and mixtures thereof. ### Claim 13 (depends on 10) The process of claim 10 wherein the alpha-olefin is C.sub.12. ### Claim 14 (depends on 5) The process of claim 5 wherein the temperature is about -5.degree. C. to about 30.degree. C. ### Claim 15 (depends on 6) The process of claim 6 wherein the alpha-olefin is a C.sub.8 and C.sub.12 olefin mixture. ### Claim 16 (depends on 1) The process of claim 1 conducted in the presence of an activating amount of a protic compound. ### Claim 17 (depends on 6) The product of claim 6 wherein the alpha-olefin is a mixture of C.sub.7 and C.sub.9 olefins. ### Claim 18 (depends on 1) The process of claim 1 wherein the alpha-olefin is normal olefin. ### Claim 19 (depends on 6) The process of claim 6 wherein the alpha-olefin is a C.sub.8, C.sub.12 and C.sub.16 olefin mixture. ### Claim 20 (depends on 1) The process of claim 1 wherein an aprotic solvent is employed. ### Claim 21 (depends on 20) The process of claim 20 wherein the aprotic solvent is a halogenated solvent. ### Claim 22 (depends on 20) The process of claim 20 wherein the aprotic solvent is selected from the group consisting of ethylene dichloride, methylene chloride, and carbon tetrachloride and mixtures thereof. ### Claim 23 (depends on 6) The process of claim 6 wherein the alpha-olefin is a C.sub.6 and C.sub.10 mixture. ### Claim 24 (depends on 20) The process of claim 20 wherein the solvent is a geminal dichloro compound. ### Claim 25 (depends on 6) The process of claim 6 wherein the alpha-olefin is a C.sub.8 and C.sub.12 mixture. ### Claim 26 (depends on 22) The process of claim 22 wherein the aprotic solvent is methylene chloride. ### Claim 27 (depends on 3) The process of claim 3 wherein the tertiary alkyl halide is the chloride. ### Claim 28 (depends on 6) The process of claim 6 wherein the alpha-olefin is a C.sub.8, C.sub.12 and C.sub.14 mixture. ### Claim 29 (depends on 1) The process of claim 1 wherein the alpha-olefin polymer is substantially free of aromatic content.