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US5804664A
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Star polymers having multiple arms emanating from a calixarene core, initiators therefor, and method for the synthesis thereof
Assignee: University of Akron
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Filing: 1997-05-23
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Granted: 1998-09-08
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Expires: 2017-05-23
Abstract
Abstract The synthesis and characterization of novel linear polymers and multi-arm star polymers comprising polyisobutylene arms connected to a well-defined calixarene core are described. The synthesis has been achieved using the "core first" method wherein multifunctional calix n!arene (where n=4 to 16) derivatives or their monofunctional analogues are used as initiators which, in conjunction with certain Freidel-Crafts acids as co-initiators, induce the living polymerization of isobutylene or a similar carbocationic polymerizable monomer to form star polymers or block copolymers. Novel initiators suitable for inducing the polymerization are also described.
Inventors
- 👤 Joseph P. Kennedy
- 👤 Istvan J. Majoros
- 👤 Sunny Jacob
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 22:13
CPC Classifications
C; C08; C08F; C08F297/00; C08F297/06; C08F10/00; C08F10/04; C08F10/08; C08F10/10
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
64 words
A composition of matter comprising: a core component selected from the group consisting of a p-methoxy cumyl group and a calix n!arene where n=4 to 16; and N number of arms containing at least one segment of polyisobutylene connected to said core component, where N=1 when said core component is said p-methoxy cumyl group and N=n, when said core component is said calix n!arene.
Claim 2
Dependent Claim
64 words
A composition of matter comprising: a core component selected from the group consisting of a p-methoxy cumyl group and a calix n!arene where n=4 to 16; and N number of arms containing at least one segment of polyisobutylene connected to said core component, where N=1 when said core component is said p-methoxy cumyl group and N=n, when said core component is said calix n!arene.
Claim 3
Dependent Claim
22 words
A composition of matter as set forth in claim 1, wherein said core component is a calix n!arene where n=6 to 16.
Claim 4
Dependent Claim
18 words
A composition of matter as set forth in claim 2, wherein said core component is a calix 8!arene.
Claim 5
Dependent Claim
24 words
A composition of matter as set forth in claim 1, wherein each said polyisobutylene arm has a functionalized tert-Cl group at the end thereof.
Claim 6
Dependent Claim
26 words
A composition of matter as set forth in claim 4, wherein the composition can be further functionalized based upon dehydrochlorination or substitution of said tert-Cl group.
Claim 7
Dependent Claim
48 words
A composition of matter as set forth in claim 1, wherein said arms further include at least one segment, incompatible with polyisobutylene, formed by cationic polymerization of a monomer other than isobutylene which is connected to the terminus end of said polyisobutylene to provide a polyisobutylene-based block copolymer.
Claim 8
Dependent Claim
17 words
A composition of matter as set further in claim 6, wherein said monomer is an aromatic monomer.
Claim 9
Dependent Claim
36 words
A composition of matter as set forth in claim 6, wherein said at least one segment is formed by the cationic polymerization of monomers selected from the group consisting of β-pirene, norbornene, styrene and derivatives thereof.
Claim 10
Dependent Claim
22 words
A composition of matter as set forth in claim 8, wherein said styrene derivatives include p-styrene, -alkyl styrene, α-methyl styrene, and indene.
Claim 11
Dependent Claim
20 words
A composition of matter as set forth in claim 1, wherein said composition has a polydispersity of less than 1.4.
Claim 12
Dependent Claim
20 words
A composition of matter as set forth in claim 1, wherein said composition has a polydispersity between 1.1 and 1.15.
Claim 13
Dependent Claim
9 words
A viscosity modifier comprising the composition of claim 1.
Claim 14
Dependent Claim
9 words
A thermoplastic elastomer comprising the composition of claim 6.
Claim 15
Dependent Claim
16 words
A thermoplastic elastomer as set forth in claim 13, wherein said monomer is an aromatic monomer.
Claim 16
Dependent Claim
35 words
A thermoplastic elastomer as set forth in claim 13, wherein said at least one segment is formed by the cationic polymerization of monomers selected from the group consisting of β-pirene, norbornene, styrene and derivatives thereof.
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2001-09-07 | 2002-03-09 | 2002-09-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2005-09-07 | 2006-03-09 | 2006-09-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2009-09-07 | 2010-03-09 | 2010-09-08 | $7700.00 | Window Closed / Lapsed |