US6228945B1
Expired / Lapsed
US
⏱️ 0.0 years remaining
Three arm star compositions of matter having diblock arms based on polyisobutylene and methods of preparation
Assignee: University of Akron
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Filing: 1999-12-20
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Granted: 2001-05-08
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Expires: 2019-12-20
Abstract
Abstract The present invention relates to compositions of matter comprising a trifunctional aromatic core, said core having three arms radiating therefrom, wherein each of said arms is a diblock copolymer comprising an inner segment of polyisobutylene connected to a outer polymer segment obtained by a living radical polymerization process. The present invention also provides a process of preparing a composition of matter comprising the steps of: providing a trifunctional aromatic initiator core; reacting the trifunctional aromatic core with isobutylene to form a macroinitiator, said macroinitiator comprising polyisobutylene functionalized at the terminus of each said arm; conducting site transformation at the terminus of each arm to introduce a group capable of initiating living radical polymerization of outer segments at the terminus of each arm; performing living radical polymerization to form the outer polymer segments to produce a three arm star composition of matter having three diblock copolymer arms.
Inventors
- 👤 Joseph P. Kennedy
- 👤 Balazs Keszler
- 👤 Györgyi Fenyvesi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 01:32
CPC Classifications
C; C09; C09D; C09D153/00; C08; C08F; C08F290/00; C08F290/02; C08F290/06; C08F293/00; C08F293/005; C08L; C08L53/00; C09J; C09J153/00; C08F2438/00; C08F2438/01
Claims Analysis
Total Claims: 20
Claim 1
Independent Claim
43 words
A composition of matter comprising: a trifunctional aromatic core, said core having three arms radiating therefrom, wherein each of said arms is a diblock copolymer comprising an inner segment of polyisobutylene connected to an outer segment obtained by a living radical polymerization process.
Claim 2
Dependent Claim
43 words
A composition of matter comprising: a trifunctional aromatic core, said core having three arms radiating therefrom, wherein each of said arms is a diblock copolymer comprising an inner segment of polyisobutylene connected to an outer segment obtained by a living radical polymerization process.
Claim 3
Dependent Claim
24 words
The composition of claim 1 , wherein the outer segment is a polymer selected from the group consisting of polyacrylates, polymethacrylates and polyacrylonitrile, polymethacrylonitrile.
Claim 4
Dependent Claim
125 words
The thermoplastic composition of matter of claim 1 , comprising a trifunctional aromatic core, said core having three arms radiating therefrom, wherein each of said arms is a diblock copolymer comprising an inner segment of polyisobutylene connected to outer polymer segment, the composition represented by Formula (I): wherein R 1 -R 6 are each independently selected from the group consisting of hydrogen, methyl, ethyl and phenyl; wherein A connects the inner segments of polyisobutylene to the outer polymer segments and is selected from wherein R 7 is selected from at least one of hydrogen and methyl; and wherein B represents the outer polymer segments, wherein the outer segment of each arm is a polymer selected from the group consisting of polyacrylates, polymethacrylates, polyacrylonitrile, and polymethacrylonitrile.
Claim 5
Dependent Claim
19 words
The composition of matter of claim 1 , wherein the outer polymer segment of each arm is a polymethacrylate.
Claim 6
Dependent Claim
14 words
The composition of matter of claim 4 , wherein the polymethacrylate is poly(methyl methacrylate).
Claim 7
Dependent Claim
22 words
The thermoplastic composition of matter of claim 1 , wherein said composition has a tensile strength of up to about 25 Mpa.
Claim 8
Dependent Claim
20 words
The thermoplastic composition of matter of claim 1 , wherein said composition has an elongation of up to about 250%.
Claim 9
Dependent Claim
10 words
A thermoplastic elastomer comprising the composition of claim 1 .
Claim 10
Dependent Claim
12 words
An adhesive composition comprising the composition of matter of claim 1 .
Claim 11
Dependent Claim
12 words
A coating composition comprising the composition of matter of claim 1 .
Claim 12
Dependent Claim
101 words
A process of preparing a composition of matter comprising the steps of: providing a trifunctional aromatic core; reacting the trifunctional aromatic core with isobutylene to form a macroinitiator having three arms, said macroinitiator comprising polyisobutylene functionalized at the terminus of each arm; conducting site transformation at the terminus of each arm to introduce a group capable of initiating living radical polymerization of outer polymer segments at the terminus of each arm; performing living radical polymerization to form the outer polymer segments at the terminus of each arm, thereby producing a three arm star composition of matter having three diblock copolymer arms.
Claim 13
Dependent Claim
101 words
A process of preparing a composition of matter comprising the steps of: providing a trifunctional aromatic core; reacting the trifunctional aromatic core with isobutylene to form a macroinitiator having three arms, said macroinitiator comprising polyisobutylene functionalized at the terminus of each arm; conducting site transformation at the terminus of each arm to introduce a group capable of initiating living radical polymerization of outer polymer segments at the terminus of each arm; performing living radical polymerization to form the outer polymer segments at the terminus of each arm, thereby producing a three arm star composition of matter having three diblock copolymer arms.
Claim 14
Dependent Claim
28 words
The process of claim 11 , wherein the outer segment of each arm is a polymer selected from the group consisting of polyacrylates, polymethacrylates, polyacrylonitrile, polymethacrylonitrile, and polystyrenes.
Claim 15
Dependent Claim
16 words
The process of claim 12 , wherein the outer segment of each arm is a polymethacrylate.
Claim 16
Dependent Claim
12 words
The process of claim 13 , wherein the polymethacrylate is poly(methyl methacrylate).
Claim 17
Dependent Claim
28 words
The process of claim 11 , wherein the group capable of initiating free radical polymerization of outer polymer segments at the terminus of each arm is 2-bromo-isobutyryl bromide.
Claim 18
Dependent Claim
11 words
A thermoplastic elastomer produced by the process of claim 11 .
Claim 19
Dependent Claim
10 words
An adhesive produced by the process of claim 11 .
Claim 20
Dependent Claim
10 words
A coating produced by the process of claim 11 .
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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) | 2004-05-07 | 2004-11-06 | 2005-05-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2008-05-07 | 2008-11-06 | 2009-05-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2012-05-07 | 2012-11-06 | 2013-05-08 | $7700.00 | Window Closed / Lapsed |