US4870144A
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Process for producing an isobutylene polymer having functional terminal end groups
Assignee: Kanegafuchi Chemical Industry Co Ltd
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Filing: 1988-02-19
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Granted: 1989-09-26
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Expires: 2008-02-19
Abstract
Abstract Isobutylene polymers having functional terminal end groups are prepared by polymerizing a cationic polymerizable monomer containing isobutylene by using: (A) as an initiator and chain transfer agent, an organic compound represented by the general formula (I): ##STR1## where X represents a halogen atom or RCOO-- group (in which R represents a hydrogen atom or a monovalent organic group), R 3 represents a (n+1)-valent hydrocarbon group, R 1 , R 2 represent respectively hydrogen atom or monovalent hydrocarbon group, R 1 and R 2 may be identifical or different with each other, R 1 and R 2 are not hydrogen atom in a case while R 3 is an aliphatic hydrogen group, n is a positive integer; (B) as a catalyst, a Lewis acid; and (C) as a solvent, a hydrocarbon or halogenated hydrocarbon containing an organonitro compound.
Inventors
- 👤 Kouji Noda
- 👤 Masayoshi Imanaka
- 👤 Katsuhiko Isayama
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 16:06
CPC Classifications
C; C08; C08F; C08F10/00; C08F10/04; C08F10/08; C08F10/10; C08F110/00; C08F110/04; C08F110/08; C08F110/10
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
210 words
A process for producing an isobutylene polymer having a functional terminal end group, which comprises polymerizing at least one cationic polymerizable monomer containing isobutylene by using: (A) as initiator and chain transfer agent, an organic compound selected from the group consisting of a compound of the formula AY.sub.l wherein A is a group having 1 to 4 aromatic rings, Y is a group of the formula ##STR16## attached to an aromatic ring of A, wherein R 4 and R 5 taken individually are a hydrogen atom or a monovalent hydrocarbon group with 1 to 10 carbon atoms; X is a halogen atom or a RCOO-group, wherein R is a hydrogen atom or a hydrocarbon group having 1 to 6 carbon atoms and l is an integer of 1 to 6; a compound of the formula B.sup.1 Zk wherein B 1 is a hydrocarbon group with 4 to 40 carbon atoms, Z is a halogen atom or a RCOO-group, wherein R is defined as above, attached to a tertiary carbon atom, and k is an integer of 1 to 4; and oligomers having α-halostryene units; (B) as a catalyst, a Lewis acid; and (C) as a solvent, a hydrocarbon or halogenated hydrocarbon containing a nitrochydrocarbon having one or two nitro groups.
Claim 2
Dependent Claim
210 words
A process for producing an isobutylene polymer having a functional terminal end group, which comprises polymerizing at least one cationic polymerizable monomer containing isobutylene by using: (A) as initiator and chain transfer agent, an organic compound selected from the group consisting of a compound of the formula AY.sub.l wherein A is a group having 1 to 4 aromatic rings, Y is a group of the formula ##STR16## attached to an aromatic ring of A, wherein R 4 and R 5 taken individually are a hydrogen atom or a monovalent hydrocarbon group with 1 to 10 carbon atoms; X is a halogen atom or a RCOO-group, wherein R is a hydrogen atom or a hydrocarbon group having 1 to 6 carbon atoms and l is an integer of 1 to 6; a compound of the formula B.sup.1 Zk wherein B 1 is a hydrocarbon group with 4 to 40 carbon atoms, Z is a halogen atom or a RCOO-group, wherein R is defined as above, attached to a tertiary carbon atom, and k is an integer of 1 to 4; and oligomers having α-halostryene units; (B) as a catalyst, a Lewis acid; and (C) as a solvent, a hydrocarbon or halogenated hydrocarbon containing a nitrochydrocarbon having one or two nitro groups.
Claim 3
Dependent Claim
14 words
A process according to claim 1, wherein the organic compound is AY l .
Claim 4
Dependent Claim
14 words
A process according to claim 1, wherein the organic compound is B 1 Zk.
Claim 5
Dependent Claim
16 words
A process according to claim 1, wherein the organic compound is an oligomer comprising α-halostyrene unit.
Claim 6
Dependent Claim
28 words
A process according to claim 1, wherein the solvent is a chlorinated hydrocarbon having one or two chlorine atoms and a nitrohydrocarbon having one or two nitro groups.
Claim 7
Dependent Claim
26 words
A process according to claim 5, wherein the solvent contains 0.1 to 100 parts by weight of the nitrohydrocarbon per 100 parts of the chlorinated hydrocarbon.
References Cited (Backward Citations)
US4611037A
Cited
US4568732A
Cited
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| 3.5 Years (Year 4) | 1992-09-25 | 1993-03-27 | 1993-09-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-09-25 | 1997-03-27 | 1997-09-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-09-25 | 2001-03-27 | 2001-09-26 | $7700.00 | Window Closed / Lapsed |