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EP0203799A1
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Random copolymer and process for production thereof
Assignee: Mitsui Chemicals Inc
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Filing: 1986-05-23
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Granted: —
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Expires: 2006-05-23
Abstract
Abstract A random copolymer is characterized in that (A) the copolymer comprises polymerized ethylene units and polymerized units of at least one cycloolefin, - (B) the mole ratio of the polymerized cycloolefin units to the polymerized ethylene units is from 3:97 to 60:40, (C) the cycloolefin is incorporated in the polymer chain without ring opening, (D) the copolymer has an intrinsic viscosity of 0.01 to 20 dl/g, (E) the copolymer has a molecular weight distribution ( M w/ M n) of not more than 4, and (F) the copolymer has a crystallinity of 0 to 10%. A monomer selected from (a) alpha, beta-unsaturated carboxylic acids and/or their derivatives, (b) styrenes, (c) organic silicon compounds having an olefinically unsaturated bond and a hydrolyzable group, or (d) unsaturated epoxy monomers may be grafted on to the random copolymer. The random copolymer is produced by continuously copolymerizing ethylene with at least one cycloolefin in a hydrocarbon medium in the presence of a catalyst formed from a soluble vanadium compound and an organoaluminum compound while maintaining the atom ratio of aluminum atoms to vanadium atoms in the reaction system, AI:V at 2 or more:1.
Inventors
- 👤 Syuji Minami
- 👤 Hirokazu Kajiura
- 👤 Hidekuni Oda
- 👤 Hideaki Yamaguchi
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-04 16:53
CPC Classifications
C; C08; C08F; C08F232/00; C08F232/08; C08F210/00; C08F210/02; C08F255/00; C08F255/02; C08F277/00
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
274 words
A random copolymer characterized in that (A) the copolymer comprises polymerized units of ethylene and polymerized units of at least one cycloolefin represented by the following formula (I) wherein R', R 2 , R 3 , R 4 , R 5 , R 6 , R 7 and R S are identical or different and each represents a hydrogan atom, halogen atom or a hydrocarbon group having 1 to 10 carbon atoms, and R 9 and R 10 are identical or different and each represents a hydrogen atom, a halogen atom or a hydrocarbon group having 1 to 10 carbon atoms or R' and R 10 are bonded to each other to form a group of the following formula in which R" and R' 2 are identical or different and each represents a hydrogen atom, a halogen atom or a hydrocarbon group having 1 to 10 carbon atoms, and ℓ is an integer of 3 or 4, and n is 0 or a positive integer of 1 to 3 (B) the mole ratio of the polymerized cycloolefin units to the polymerized ethylene units is from 3:97 to 60:40, (C) the or each cycloolefin of formula (I) is incorporated in the polymer chain as polymerized units represented by the following formula (II) wherein all symbols are as defined above, (D) the copolymer has an intrinsic viscosity (η), measured in decalin at 135°C, of 0.01 to 20 dl/g, (E) the copolymer has a molecular weight distribution ( M w/ M n), measured by get permeation chromatography, of not more than 4, and (F) the copolymer has a crystallinity, measured by X-ray diffractometry, of 0 to 10%.
Claim 2
Dependent Claim
274 words
A random copolymer characterized in that (A) the copolymer comprises polymerized units of ethylene and polymerized units of at least one cycloolefin represented by the following formula (I) wherein R', R 2 , R 3 , R 4 , R 5 , R 6 , R 7 and R S are identical or different and each represents a hydrogan atom, halogen atom or a hydrocarbon group having 1 to 10 carbon atoms, and R 9 and R 10 are identical or different and each represents a hydrogen atom, a halogen atom or a hydrocarbon group having 1 to 10 carbon atoms or R' and R 10 are bonded to each other to form a group of the following formula in which R" and R' 2 are identical or different and each represents a hydrogen atom, a halogen atom or a hydrocarbon group having 1 to 10 carbon atoms, and ℓ is an integer of 3 or 4, and n is 0 or a positive integer of 1 to 3 (B) the mole ratio of the polymerized cycloolefin units to the polymerized ethylene units is from 3:97 to 60:40, (C) the or each cycloolefin of formula (I) is incorporated in the polymer chain as polymerized units represented by the following formula (II) wherein all symbols are as defined above, (D) the copolymer has an intrinsic viscosity (η), measured in decalin at 135°C, of 0.01 to 20 dl/g, (E) the copolymer has a molecular weight distribution ( M w/ M n), measured by get permeation chromatography, of not more than 4, and (F) the copolymer has a crystallinity, measured by X-ray diffractometry, of 0 to 10%.
Claim 3
Dependent Claim
23 words
A random copolymer according to claim 1 wherein the or each cycloolefin is a compound of formula (I) in which n is 0.
Claim 4
Dependent Claim
18 words
A random copolymer according to claim 2 which has a glass transition temperature (Tg) of 10 to 130°C.
Claim 5
Dependent Claim
29 words
A random copolymer according to claim 2 or 3 wherein the mole ratio (B) of the polymerized cycloolefin units to the polymerized ethylene units is from 10:90 to 60:40.
Claim 6
Dependent Claim
29 words
A random copolymer according to claim 1 wherein the or each cycloolefin is a compound of formula (I) in which n is a positive integer of 1 to 3.
Claim 7
Dependent Claim
18 words
A random copolymer according to claim 5 which has a glass transition temperature (Tg) of 10 to 240°C.
Claim 8
Dependent Claim
71 words
A process for producing a random copolymer as defined in any one of the preceding claims, which process comprises continuously copolymerizing ethylene with the or each cycloolefin represented by formula (I) in a hydrocarbon medium in the presence of a catalyst formed from a soluble vanadium compound and an organo-aluminum compound while maintaining the atomic ratio of aluminum atoms to vanadium atoms in the reaction system, AI:V, at 2 or more:1.
Claim 9
Dependent Claim
44 words
A process according to claim 7 wherein the soluble vanadium compound is added to the reaction system in a concentration not more than 10 times its existing concentration in the reaction system in order to maintain the atomic ratio AI:V at 2 or rnore:1.
Claim 10
Dependent Claim
77 words
A process for preparing a modified random copolymer, which process comprises grafting on to a random copolymer as defined in any one of claims 1 to 6 0.1 to 50 parts by weight of a monomer selected from (a) alpha, beta-unsaturated carboxylic acids and/or their derivatives, - (b) styrenes, (c) organic silicon compounds having an olefinically unsaturated bond and a hydrolyzable group, and (d) unsaturated epoxy monomers per 100 parts by weight of the said random copolymer.
Claim 11
Dependent Claim
21 words
A process according to claim 9 which has an intrinsic viscosity, measured in decalin at 135°C, of 0.03 to 20 dl/g.
Claim 12
Dependent Claim
34 words
Molded articles prepared from a random copolymer as deformed in any one of claims 1 to 6 or from a modified random copolymer prepared by a process as claimed in claim 9 to 10.
References Cited (Backward Citations)
US3494897A
Cited
EP0156464B1
Cited
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