EP0200351A2
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EP
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Liquid ethylene-type random copolymer, process for production thereof, and use thereof
Assignee: Mitsui Chemicals Inc
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Filing: 1986-03-25
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Granted: —
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Expires: 2006-03-25
Abstract
Abstract A liquid ethylene-type random copolymer, useful as such or when hydrogenated as a synthetic lubricant oil, is characterized in that (a) it has an ethylene unit content of from 10 to 85 mole% and an alpha-olefin unit content of from 15 to 90 mole%, (b) it has a number average molecular weight (M n ), measured by gel permeation chromatography, of from 3 x 10 2 to 1 x 10 4 , (c) is has a molecular weight distribution ( M w / M n ), determined by gel permeation chromatography, of not more than 2.5, (d) it has a B value, defined by the following equation (I), as defined by the following equation (II) wherein P E represents the molar fraction of the ethylene component in the copolymer, P o is the molar fraction of the alpha-olefin component in the copolymer, P OE is the molar fraction of alpha-olefin/ethylene chains in the total dyad chains, (e) signals of αβ and βγ based on a methylene chain between two adjacent tertiary carbon atoms in the main chain of the copolymer are not substantially observed in the 13 C-NMR spectrum of the copolymer, and (f) it has an iodine value of from 0 to 85.
Inventors
- 👤 Toshiyuki Tsutsui
- 👤 Mamoru Kioka
- 👤 Akinori Toyota
- 👤 Norio Kashiwa
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-30 13:00
CPC Classifications
C; C08; C08F; C08F210/00; C08F210/16; C08F10/00; C08F8/00; C08F8/04; C10; C10M; C10M107/00; C10M107/02; C10M107/06; C10M107/08; C08F4/00; C08F4/42; C08F4/44; C08F4/60; C08F4/62; C08F4/64; C08F4/659; C08F4/65912; C08F4/6592; C08F4/65922; C08F4/65925
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
210 words
A liquid ethylene-type random copolymer consisting essentially of units derived from ethylene and an alpha-olefin having 3 to 20 carbon atoms, said copolymer being characterized in that (a) it has an ethylene unit content of from 10 to 85 mole% and an alpha-olefin unit content of from 15 to 90 mole%, (b) it has a number average molecular weight ( M _), measured by gel permeation chromatography, of from 3 x 10 to 1 x 10 4 , (c) it has a molecular weight distribution ( M w / M n ), determined by gel permeation chromatography, of not more than 2.5, (d) it has a B value, defined by the following equation (I), as defined by the following equation (II) wherein P E represents the molar fraction of the ethylene component in the copolymer, P 0 is the molar fraction of the alpha-olefin component in the copolymer, P OE is the molar fraction of alpha-olefin/ethylene chains in the total dyad chains, (e) signals of αβ and βγ based on a methylene chain between two adjacent tertiary carbon atoms in the main chain of the copolymer are not substantially observed in the 13 C-NMR spectrum of the copolymer, and (f) it has an iodine value of from 0 to 85.
Claim 2
Dependent Claim
210 words
A liquid ethylene-type random copolymer consisting essentially of units derived from ethylene and an alpha-olefin having 3 to 20 carbon atoms, said copolymer being characterized in that (a) it has an ethylene unit content of from 10 to 85 mole% and an alpha-olefin unit content of from 15 to 90 mole%, (b) it has a number average molecular weight ( M _), measured by gel permeation chromatography, of from 3 x 10 to 1 x 10 4 , (c) it has a molecular weight distribution ( M w / M n ), determined by gel permeation chromatography, of not more than 2.5, (d) it has a B value, defined by the following equation (I), as defined by the following equation (II) wherein P E represents the molar fraction of the ethylene component in the copolymer, P 0 is the molar fraction of the alpha-olefin component in the copolymer, P OE is the molar fraction of alpha-olefin/ethylene chains in the total dyad chains, (e) signals of αβ and βγ based on a methylene chain between two adjacent tertiary carbon atoms in the main chain of the copolymer are not substantially observed in the 13 C-NMR spectrum of the copolymer, and (f) it has an iodine value of from 0 to 85.
Claim 3
Dependent Claim
28 words
A copolymer according to claim 1 which has an ethylene unit content of from 20 to 80 mole% and an alpha-olefin unit content of 20 to 80 mole%.
Claim 4
Dependent Claim
31 words
3 . A copolymer according to claim 2 which has an ethylene unit content of from 30 to 70 mole% and an alpha-olefin unit content of from 30 to 70 mole%.
Claim 5
Dependent Claim
30 words
A copolymer according to any one of the preceding claims which has a number average molecular weight (b) of from 5 x 10 2 to 5 x 10 3 .
Claim 6
Dependent Claim
22 words
A copolymer according to any one of the preceding claims which has a molecular weight distribution (c) of not more than 2.2.
Claim 7
Dependent Claim
38 words
A copolymer according to any one of the preceding claims which has an ethylene unit content of not more than 50 mole% and a B value (d) defined by the formula 1.0 + 0.3xP E ≦B≦1/(1 - PE).
Claim 8
Dependent Claim
37 words
A copolymer according to any one of claims 1 to 5 which has an ethylene content of more than 50 mole% and a B value (d) defined by the equation 1.3 - 0.3xP E ≦B≦1/P E .
Claim 9
Dependent Claim
20 words
A copolymer according to any one of the preceding claims which has an iodine value of from 0 to 50.
Claim 10
Dependent Claim
53 words
A process for producing a liquid ethylene-type random copolymer according to any one of the preceding claims, which comprises copolymerizing ethylene and an alpha-olefin having 3 to 20 carbon atoms in the presence of a catalyst comprising a compound of a transition metal of Group IVb of the periodic table and an aluminoxane.
Claim 11
Dependent Claim
15 words
A process according to claim 9 wherein the transition metal is titanium, zirconium or hafnium.
Claim 12
Dependent Claim
92 words
A process according to claim 10 wherein the compound of the transition metal is represented by the following formula (III) wherein a, b, c and d are positive numbers and a+b+c+d= 4 , R 11 represents an alkyl, alkenyl, cycloalkadienyl, aryl or aralkyl group, R 12 respresents an alkyl, alkenyl, cycloalkadienyl, aryl or aralkyl group or a halogen atom, R 13 and R 14 are identical or different and each represents an alkyl, alkenyl, cycloalkadienyl, aryl or aralkyl group or a hydrogen or halogen atom and Me is Ti, Zr or Hf.
Claim 13
Dependent Claim
65 words
A process according to claim 9 or 10 wherein the compound of the transition metal is represented by the following formula (III-1) wherein e, f, g and h are positive numbers, and e+f+g+h=4, R 15 represents a cycloalkadienyl group, and R 16 and R 17 are identical or different and each represents a cycloalkadienyl, aryl, aralkyl or alkyl group or a halogen or hydrogen atom.
Claim 14
Dependent Claim
48 words
A process according to any one of claims 9 to 12 wherein the aluminoxane is a compound represented by the following formula (IV) or (V) wherein R 20 represents an alkyl group and m is more than 20, or wherein R 20 and m are as defined above.
Claim 15
Dependent Claim
22 words
A process according to any one of claims 9 to 13 wherein the copolymerization reaction is carried out in a hydrocarbon medium.
Claim 16
Dependent Claim
26 words
A process according to any one of claims 9 to 14 wherein the copolymerization reaction is carried out at a temperature of from -50°C to 200°C.
Claim 17
Dependent Claim
47 words
A process for producing a hydrogenated liquid ethylene-type random copolymer, which process comprises hydrogenating a liquid ethylene-type random copolymer as claimed in any one of claims 1 to 8 or which has been produced by a process as claimed in any one of claims 9 to 15.
Claim 18
Dependent Claim
42 words
A process according to claim 16, wherein hydrogenation is effected on a said liquid ethylene-type random copolymer having an iodine value of not more than 80 such as to obtain a hydrogenated polymer having an iodine value of from 0 to 0.3.
Claim 19
Dependent Claim
62 words
Use as a synthetic lubricant oil of a liquid ethylene-type random copolymer as claimed in any one of claims 1 to 8 or which has been produced by a process as claimed in any one of claims 9 to 15 or of a hydrogenated liquid ethylene-type random copolymer which has been produced by a process as claimed in claim 16 or 17.
References Cited (Backward Citations)
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