EP0156464B1
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EP
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Random copolymer
Assignee: Mitsui Chemicals Inc
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Filing: 1985-02-01
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Granted: 1996-05-22
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Expires: 2005-02-01
Abstract
No abstract record available.
Inventors
- 👤 Hirokazu Kajiura
- 👤 Hidekuni Oda
- 👤 Syuji Minami
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-30 04:28
CPC Classifications
C; C08; C08G; C08G61/00; C08G61/02; C08G61/04; C08G61/06; C08G61/08; C08F; C08F210/00; C08F210/02; C08L; C08L65/00
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
201 words
A transparent random copolymer, characterised in that (A) it consists essentially of (i) polymerized units derived from at least one 1,4,5,8-dimethano-1,2,3,4,4a,5,8,8a-octahydronaphthalene represented by the formula (1) wherein R₁ and R₂ are the same or different and each represents a hydrogen atom, a halogen atom or an alkyl group, or R₁ and R₂ may be bonded to each other to form a trimethylene group or a group represented by the formula in which R₃ and R₄ are the same or different and each represents a hydrogen atom, a halogen atom or an alkyl group (ii) polymerized units derived from ethylene and (iii) polymerized units derived from at least one alpha-olefin of at least 3 carbon atoms and/or a cycloolefin in addition to that of formula (1), (B) the mole ratio of polymerized units derived from the 1,4,5,8-dimethano-1,2,3,4,4a,5,8,8a-octahydronaphthalene to polymerized units derived from ethylene is from 3:97 to 95:5, (B') the mole ratio of polymerized units derived from the at least one alpha-olefin and/or cycloolefin to the polymerized units derived from the 1,4,5,8-dimethano-1,2,3,4,4a,5,8,8a-octahydronaphthalene is from 95:5 to 20:80, and (C) the 1,4,5,8-dimethano-1,2,3,4,4a,5,8,8a-octahydronaphthalene is incorporated in the polymer chain as polymerized units represented by formula (2) wherein R₁ and R₂ are as defined above.
Claim 2
Dependent Claim
22 words
A random copolymer according to claim 1 which has an intrinsic viscosity, measured in decalin at 135°C, of 0.005 to 20 dl/g.
Claim 3
Dependent Claim
21 words
A random copolymer according to claim 1 or 2 wherein at least one of R₁ and R₂ is an alkyl group.
Claim 4
Dependent Claim
20 words
A random copolymer according to claim 1, 2 or 3 which has a glass transition temperature of at least 2°C.
Claim 5
Dependent Claim
93 words
A process for producing a random copolymer as claimed in any one of the preceding claims which comprises copolymerizing a monomer mixture consisting essentially of ethylene, at least one alpha-olefin of at least 3 carbon atoms and/or cycloolefin, and at least one 1,4,5,8-dimethano-1,2,3,4,4a,5,8,8a-octahydronaphthalene of formula (1) as defined in claim 1 in a hydrocarbon medium in the presence of a catalyst formed from a vanadium, titanium or zirconium compound and an organoaluminium compound which are soluble in the hydrocarbon medium and under a pressure of up to 4.9 MPa (0 to 50 kg/cm).
Claim 6
Dependent Claim
16 words
Shaped articles of a random copolymer as claimed in any one of claims 1 to 4.
References Cited (Backward Citations)
No citation records indexed.
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