US4935475A
Expired / Lapsed
US
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Process for producing cycloolefin random copolymer
Assignee: Mitsui Chemicals Inc
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Filing: 1988-09-30
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Granted: 1990-06-19
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Expires: 2008-09-30
Abstract
Abstract A process for producing a cycloolefin random copolymer, which comprises (1) copolymerizing (a) ethylene or both ethylene and an alpha-olefin having at least 3 carbon atoms with (b) an cycloolefin such as octahydronaphthalenes and bicyclo[2,2,1]hept-2-ene in the presence of (c) a catalyst formed from a soluble vanadium compound and an organoaluminum compound at least one of which has halogen, in (d) a liquid phase composed of a hydrocarbon medium to form a solution of a cycloolefin random copolymer, and (2) contacting the resulting copolymer solution with (e) an adsorbent containing a metal cation.
Inventors
- 👤 Kotaroh Kishimura
- 👤 Hideaki Yamaguchi
- 👤 Syuji Minami
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 03:08
CPC Classifications
C; C08; C08F; C08F232/00; C08F232/02; C08F232/04; C08F210/00; C08F210/02; C08F232/08; C08F6/00; C08F6/06
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
178 words
A process for producing a cycloolefin random copolymer, which comprises (1) copolymerizing (a) ethylene or both ethylene and an alpha-olefin having at least 3 carbon atoms with (b) at least one cycloolefin selected from the group consisting of unsaturated monomers of the following formula (I) ##STR47## wherein n is 0 or a positive integer, and each of R 1 to R 10 represents a halogen atom or a hydrocarbon group, and unsaturated monomers of the following formula (II) ##STR48## wherein m is 0 or a positive integer, and R 1 to R 10 are as defined above, and l is an integer of at least 3, in the presence of (c) a catalyst formed from a soluble vanadium compound and an organoaluminum compound at least one of which has halogen, in (d) a liquid phase composed of a hydrocarbon medium to form a solution of cycloolefin random copolymer containing a halogenated by-product of the cycloolefin, and (2) contacting the resulting copolymer solution with (e) an adsorbent containing a metal cation to remove the halogenated by-product from said solution.
Claim 2
Dependent Claim
178 words
A process for producing a cycloolefin random copolymer, which comprises (1) copolymerizing (a) ethylene or both ethylene and an alpha-olefin having at least 3 carbon atoms with (b) at least one cycloolefin selected from the group consisting of unsaturated monomers of the following formula (I) ##STR47## wherein n is 0 or a positive integer, and each of R 1 to R 10 represents a halogen atom or a hydrocarbon group, and unsaturated monomers of the following formula (II) ##STR48## wherein m is 0 or a positive integer, and R 1 to R 10 are as defined above, and l is an integer of at least 3, in the presence of (c) a catalyst formed from a soluble vanadium compound and an organoaluminum compound at least one of which has halogen, in (d) a liquid phase composed of a hydrocarbon medium to form a solution of cycloolefin random copolymer containing a halogenated by-product of the cycloolefin, and (2) contacting the resulting copolymer solution with (e) an adsorbent containing a metal cation to remove the halogenated by-product from said solution.
Claim 3
Dependent Claim
28 words
The process of claim 1 in which after step (1) but before step (2), the random copolymer solution formed in step (1) is subjected to a deashing treatment.
Claim 4
Dependent Claim
31 words
The process of claim 1 in which the adsorbent containing a metal cation is an adsorbent containing at least one cation selected from alkali metal cations and alkaline earth metal cations.
Claim 5
Dependent Claim
28 words
The process of claim 1 in which the adsorbent contains at least 5% by weight, in a condition free from water of crystallization, of an alkali metal cation.
Claim 6
Dependent Claim
23 words
The process of claim 1 in which the adsorbent contains many pores and has a maximum pore diameter of at least 0.5 nm.
Claim 7
Dependent Claim
21 words
The process of claim 1 in which the adsorbent has a specific surface area of 100 to 1,000 m 2 /g.
Claim 8
Dependent Claim
20 words
The process of claim 1 which produces a random copolymer having a halogen content of not more than 200 ppm.
Claim 9
Dependent Claim
16 words
The process of claim 1 in which the adsorbent is a zeolite containing alkali metal cation.
References Cited (Backward Citations)
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| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
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| 3.5 Years (Year 4) | 1993-06-18 | 1993-12-18 | 1994-06-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-06-18 | 1997-12-18 | 1998-06-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-06-18 | 2001-12-18 | 2002-06-19 | $7700.00 | Window Closed / Lapsed |