EP0060609A1
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EP
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Process for producing an ethylene/alpha-olefin copolymer
Assignee: Mitsui Chemicals Inc
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Filing: 1982-01-08
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Granted: —
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Expires: 2002-01-08
Abstract
Abstract A copolymer of 30-90 mol % ethylene und an alpha-olefine having 3 to 14 carbon atoms, with a number average molecular weight of 300-30000, a Q value of not more than 3 and a Z value of 15-200, is prepared in a continuous way in the presence of hydrogen and of a vanadium compound with the formula VO(OR<1>)n X<1>3-n or VX<1>4 [R<1>: aliphatic hydrocarbon group having 1 to 20 carbon atoms; X<1>: halogen atom; n: number from 0 to 3] and an organo-aluminium compound with the formula R<2>mAl X<2>3-m [R<2>: aliphatic hydrocarbon group having 1 to 6 carbon atoms; X<2>: halogen atom; m: number from 1 to 3]. The copolymer is used as a synthetic lubricant oil or fuel oil component.
Inventors
- 👤 Hidekuni Oda
- 👤 Tatuo Kinoshita
- 👤 Akiyoshi Shimizu
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-09 14:10
CPC Classifications
C; C10; C10M; C10M143/00; C10M143/08; C07; C07C; C07C11/00; C07C11/02; C07C2/00; C07C2/02; C07C2/04; C07C2/06; C07C2/08; C07C2/26; C07C2/30; C08; C08F; C08F210/00; C08F210/16; C10L; C10L1/00; C10L1/10; C10L1/14; C10L1/16; C10L1/1625; C10L1/1633; C10L1/1641; C10M107/00; C10M107/02; C10M107/04; C10M143/02; C10M143/04; C07C2527/00; C07C2527/06; C07C2527/133; C07C2531/00; C07C2531/02; C07C2531/12; C07C2531/14; C07C2531/26; C07C2531/36; C10M2205/00; C10M2205/02; C10M2205/0206; C10M2205/022; C10M2205/0225; C10N; C10N2020/00; C10N2020/01; Y; Y02; Y02P; Y02P20/00; Y02P20/50; Y02P20/52
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
109 words
A copolymer of ethylene and an alpha-olefin having a low molecular weight and a narrow molecular weight distribution, characterised in that the copolymer has an ethylene content of from 30 to 90 mole%, a number average molecular weight of from 300 to 30,000 and a molecular weight distribution defined by a Q value (the ratio of the weight average molecular weight to the number average molecular weight) of not more than 3 and a Z value (the ratio of the maximum value of the molecular weight to the minimum value of the molecular weight when the molecular weight is measured by gel permeation chromatography) of from 15 to 200.
Claim 2
Dependent Claim
109 words
A copolymer of ethylene and an alpha-olefin having a low molecular weight and a narrow molecular weight distribution, characterised in that the copolymer has an ethylene content of from 30 to 90 mole%, a number average molecular weight of from 300 to 30,000 and a molecular weight distribution defined by a Q value (the ratio of the weight average molecular weight to the number average molecular weight) of not more than 3 and a Z value (the ratio of the maximum value of the molecular weight to the minimum value of the molecular weight when the molecular weight is measured by gel permeation chromatography) of from 15 to 200.
Claim 3
Dependent Claim
44 words
A copolymer according to claim 1 which has an ethylene content of from 35 to 85 mole%, a number average molecular weight of from 500 to 25,000, a Q value of not more than 2.8 and a Z value of from 20 to 190.
Claim 4
Dependent Claim
17 words
A copolymer according to claim 1 or 2 wherein the alpha-olefin has 3 to 14 carbon atoms.
Claim 5
Dependent Claim
116 words
A process for producing a copolymer as claimed in claim 1, 2 or 3, which process comprises copolymerizing ethylene with the alpha-olefin in the liquid phase in the presence of a polymerization catalyst composed of a soluble vanadium compound and an organoaluminum compound in the co-presence of hydrogen, characterized in that (a) the copolymerization is carried out in a continuous manner, (b) the concentration of the vanadium compound in the polymerization system is maintained at 0.3 to 30 millimoles/liter, and (c) the vanadium compound is supplied to the polymerization system as a solution in a polymerization medium in a concentration which is 1 to 5 times the concentration of the vanadium compound in the liquid phase.
Claim 6
Dependent Claim
82 words
A process according to claim 4 wherein the soluble vanadium compound is of the formula wherein R 1 represents an aliphatic hydrocarbon group having 1 to 20 carbon atoms, X 1 represents a halogen atom, and n is a number of from 0 to 3, and the organoaluminum compound is of the formula wherein R 2 represents an aliphatic hydrocarbon group having 1 to 6 carbon atoms, x2 represents a halogen atom, and m is a number of from 1 to 3.
Claim 7
Dependent Claim
50 words
A process according to claim 4 or 5 wherein the concentration of the vanadium compound in the liquid phase is maintained at 0.5 to 20 millimoles and the organoaluminum compound is used in such an amount that the Al/V atomic ratio in the liquid phase is from 2/1 to 50/1.
Claim 8
Dependent Claim
59 words
A process according to claim 4, 5 or 6 wherein the average residence time of the reaction mixture in the polymerization system is from 5 to 300 minutes, and the copolymerization is carried out at a temperature of from 0 to 100°C and at a pressure of from 0 to 50 kg/cm , gauge (0 to 4.9 MPa gauge).
Claim 9
Dependent Claim
33 words
A process according to any one of claims 4 to 7 wherein ethylene and the alpha-olefin are fed into the polymerization system so that the ethylene/alpha-olefin mole ratio is from 1:10 to 10:1.
Claim 10
Dependent Claim
38 words
A process according to any one of claims 4 to 8 wherein hydrogen is used in an amount of 1/100 to 100/1 .moles per mole of the sum of the ethylene and alpha-olefin fed to the polymerization system.
Claim 11
Dependent Claim
17 words
A synthetic lubricant oil consisting essentially of a copolymer as claimed in claim 1, 2 or 3.
Claim 12
Dependent Claim
29 words
A synthetic lubricant oil according to claim 10 which has a viscosity index of at least 130 and a kinematic viscosity at 100°C of from 4 to 200 centistokes.
Claim 13
Dependent Claim
40 words
A fuel oil comprising a fuel oil component and a copolymer as claimed in claim 1, 2 or 3 having an ethylene content of from 70 to 90 mole% and a number average molecular weight of from 1,000 to 20,000.
Claim 14
Dependent Claim
29 words
A fuel oil according to claim 12 wherein the copolymer has an ethylene content of 75 to 85 mole% and a number average molecular weight of 2000 to 20,000.
Claim 15
Dependent Claim
30 words
A fuel oil according to claim 13 wherein the copolymer has an ethylene content of 77 to 83 mole% and a number average molecular weight of from 3,000 to 10,000.
Claim 16
Dependent Claim
37 words
A fuel oil according to claim 12, 13 or 14 wherein the fuel oil component is straight run or cracked gas oil or a blend in any proportion of straight run and thermally and/or catalytic cracked distillates.
References Cited (Backward Citations)
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