US5428111A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Living polymerization of olefins to produce copolymer
Assignee: University of Massachusetts Amherst
•
Filing: 1993-10-15
•
Granted: 1995-06-27
•
Expires: 2013-10-15
Abstract
Abstract The present invention provides a process for the living polymerization of aromatic, preferably styrenic monomers initiated from a living polyolefin, particularly polyisobutylene, chain end and thereby provides an efficient method for the preparation of block copolymers having polyolefin mid-blocks and styrenic end blocks. Polyisobutylene mid blocks and styrenic end blocks comprising para-methylstyrene, alpha-methylstyrene, indene and the like are preferred.
Inventors
- 👤 Rudolph Faust
- 👤 Zsolt Fodor
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 12:12
CPC Classifications
C; C08; C08F; C08F297/00; C08F297/06
Claims Analysis
Total Claims: 34
Claim 1
Independent Claim
69 words
A method for producing a block copolymer comprising: (a) contacting under reaction conditions a living polymer cation with an olefin capping agent which does not homopolymerize under said reaction conditions to form an end-capped living polymer carbocation; and (b) contacting said end-capped living polymer carbocation under cationic polymerization conditions with one or more cationically polymerizable monomers to produce a block copolymer containing polymer segments of said cationically polymerizable monomer.
Claim 2
Independent Claim
69 words
A method for producing a block copolymer comprising: (a) contacting under reaction conditions a living polymer cation with an olefin capping agent which does not homopolymerize under said reaction conditions to form an end-capped living polymer carbocation; and (b) contacting said end-capped living polymer carbocation under cationic polymerization conditions with one or more cationically polymerizable monomers to produce a block copolymer containing polymer segments of said cationically polymerizable monomer.
Claim 3
Dependent Claim
31 words
The method of claim 1 wherein said capping agent is selected from the group consisting of a diphenylalkene, an α-methoxystyrene, a trans-stilbene, a 1-isopropenylnaphthalene, a 2,4-dimethyl-α-methylstyrene and ring substituted derivatives thereof.
Claim 4
Dependent Claim
13 words
The method of claim 2 wherein said capping agent is a diphenyl alkene.
Claim 5
Dependent Claim
13 words
The method of claim 3 wherein said capping agent is a diphenyl ethylene.
Claim 6
Dependent Claim
11 words
The method of claim 4 wherein said capping agent is 1,1-diphenylethylene.
Claim 7
Dependent Claim
15 words
The method of claim 1 wherein said cationically polymerizable monomer is a vinyl aromatic monomer.
Claim 8
Dependent Claim
22 words
The method of claim 6 wherein said vinyl aromatic monomer is selected from the group consisting of styrenic, napthalenic and indenyl monomers.
Claim 9
Dependent Claim
24 words
The method of claim 7 wherein said vinyl aromatic monomer is an alkyl styrene wherein the alkyl group contains 1 to 40 carbon atoms.
Claim 10
Dependent Claim
12 words
The method of claim 8 wherein said vinyl aromatic monomer is para-methylstyrene.
Claim 11
Dependent Claim
24 words
The method of claim 2 wherein said ring substituted derivatives are selected from the group consisting of methyl, methoxy, dimethyl, amino and trimethylsiloxy groups.
Claim 12
Dependent Claim
17 words
The method of claim 1 wherein said living polymer cation comprises a cation of an olefin polymer.
Claim 13
Dependent Claim
33 words
The method of claim 11 wherein said olefin polymer is selected from the group consisting of C 4 to C 18 polyisomonoolefins, C 4 to C 14 polymultiolefins, vinyl polymers and vinylidene polymers.
Claim 14
Dependent Claim
17 words
The method of claim 11 wherein said olefin polymer is a C 4 to C 8 polyisomonoolefin.
Claim 15
Dependent Claim
11 words
The method of claim 13 wherein said olefin polymer is polyisobutylene.
Claim 16
Dependent Claim
34 words
The method of claim 1 wherein said capping agent is added to said living polymer cation at a concentration equal to up to about 10 times the concentration of said living polymer cation ends.
Claim 17
Dependent Claim
23 words
The method of claim 15 wherein said concentration is from about 1 to 2 times the concentration of said living polymer cation ends.
Claim 18
Dependent Claim
42 words
The method of claim 1 wherein said living polymer cation produced in step (a) is produced by contacting a cationically polymerizable monomer with an initiator system comprising a mixture of an organic ether, organic ester or organic halide and a Lewis acid.
Claim 19
Dependent Claim
26 words
The method of claim 1 wherein said cationic polymerization conditions of step (b) include a temperature in range of minus 100° C. to plus 10° C.
Claim 20
Dependent Claim
10 words
A block copolymer prepared by the process of claim 1.
Claim 21
Independent Claim
60 words
A method for producing a block copolymer comprising a polyisobutylene polymer segment and a segment of polymerized styrenic monomer comprising: (a) contacting a living polyisobutylene cation under reaction conditions with a diphenyl alkene capping agent to form an end-capped living polyisobutylene carbocation; and (b) contacting said carbocation with a styrenic monomer under cationic polymerization conditions to form said block copolymer.
Claim 22
Independent Claim
60 words
A method for producing a block copolymer comprising a polyisobutylene polymer segment and a segment of polymerized styrenic monomer comprising: (a) contacting a living polyisobutylene cation under reaction conditions with a diphenyl alkene capping agent to form an end-capped living polyisobutylene carbocation; and (b) contacting said carbocation with a styrenic monomer under cationic polymerization conditions to form said block copolymer.
Claim 23
Dependent Claim
13 words
The method of claim 20 wherein said diphenyl alkene capping agent is 1,1-diphenylethylene.
Claim 24
Dependent Claim
11 words
The method of claim 21 wherein said styrenic monomer is para-methylstyrene.
Claim 25
Dependent Claim
26 words
The block copolymer of claim 19 comprising a polymer chain segment of an olefin polymer and a polymer chain segment of a polymerized vinyl aromatic monomer.
Claim 26
Dependent Claim
14 words
The block copolymer of claim 23 wherein said olefin polymer is an isoolefin polymer.
Claim 27
Dependent Claim
12 words
The block copolymer of claim 24 wherein said isoolefin polymer is polyisobutylene.
Claim 28
Dependent Claim
16 words
The block copolymer of claim 23 wherein said polymerized vinyl aromatic monomer is a styrenic monomer.
Claim 29
Dependent Claim
12 words
The block copolymer of claim 26 wherein said styrenic monomer is para-methylstyrene.
Claim 30
Dependent Claim
21 words
The block copolymer of claim 23 comprising a mid-block of said olefin polymer and end-blocks of said polymerized vinyl aromatic monomer.
Claim 31
Dependent Claim
19 words
The block copolymer of claim 28 wherein said olefin polymer is polyisobutylene and said vinyl aromatic monomer is paramethylstyrene.
Claim 32
Dependent Claim
29 words
The block copolymer of claim 23 having a number average molecular weight of up to 2,000,000 and a molecular weight distribution (Mw/Mn) of from about 1.0 to about 1.5.
Claim 33
Dependent Claim
14 words
The block copolymer of claim 19 wherein said capping agent is a diphenyl alkene.
Claim 34
Dependent Claim
14 words
The block copolymer of claim 31 wherein said capping agent is a diphenyl ethylene.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1998-06-26 | 1998-12-26 | 1999-06-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2002-06-26 | 2002-12-26 | 2003-06-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2006-06-26 | 2006-12-26 | 2007-06-27 | $7700.00 | Window Closed / Lapsed |