US5206303A
Expired / Lapsed
US
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Entanglement-inhibited macromolecules
Assignee: ExxonMobil Chemical Patents Inc
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Filing: 1990-12-27
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Granted: 1993-04-27
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Expires: 2010-12-27
Abstract
Abstract A grafted and/or functionalized macromolecule comprises entanglement-inhibited architecture wherein the polymer exhibits reduced melt viscosity. In one embodiment, the macromolecule comprises a polymer of an isoolefin having about 4 to about 7 carbon atom and a para-alkylstyrene, wherein a grafted macromonomer such as a terminally functionalized polystyryl chain of very narrow molecular weight distribution is attached to the para-alkyl group of the para-alkylstyrene such that entanglement of adjacent chains in the melt are inhibited. In addition to distributed macromonomer grafts, other functionality may be attached to the para-alkyl group of the para-alkylstyrene to introduce other desirable properties such as radiation curability. In another embodiment the macromolecule comprises a polymer of one or more simple olefinic monomers wherein a macromolecule is attached to pendent functionality and/or copolymerized into the polymer backbone. A particularly preferred macromonomer comprises a terminal norbornene functional group.
Inventors
- 👤 Mun-Fu Tse
- 👤 Anthony J. Dias
- 👤 Prasadarao Meka
- 👤 Kenneth O. McElrath
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 05:23
CPC Classifications
C; C08; C08F; C08F299/00; C08F291/00; C08G; C08G81/00
Claims Analysis
Total Claims: 33
Claim 1
Independent Claim
189 words
A graft polymer, comprising: main chain of at least about 25,000 weight average molecular weight comprising a polymer of an iso-olefin having about 4 to about 7 carbon atoms and a para-alkyl styrene, wherein said main chain polymer has a substantially homogeneous compositional distribution; and a plurality of side chains distributed along said main chain and attached to para-alkyl groups of the main chain para-alkyl styrenes, wherein an average weight average molecular weight of segments of said main chain between adjacent side chains (M MCS ) is in a range of from about 0.02 M e A to a about 2 M e A , wherein M e A is the entanglement molecular weight of said main chain, and wherein the side chains have an average weight average molecular weight (M SC ) in a range from about 0.02 M e B to about 2 M e B , wherein M e B is the entanglement molecular of said side chains, and at least about 95 weight % of said side chain has a para-alkyl styrene content within about 10 weight % of the average para-alkyl styrene content polymer.
Claim 2
Dependent Claim
189 words
A graft polymer, comprising: main chain of at least about 25,000 weight average molecular weight comprising a polymer of an iso-olefin having about 4 to about 7 carbon atoms and a para-alkyl styrene, wherein said main chain polymer has a substantially homogeneous compositional distribution; and a plurality of side chains distributed along said main chain and attached to para-alkyl groups of the main chain para-alkyl styrenes, wherein an average weight average molecular weight of segments of said main chain between adjacent side chains (M MCS ) is in a range of from about 0.02 M e A to a about 2 M e A , wherein M e A is the entanglement molecular weight of said main chain, and wherein the side chains have an average weight average molecular weight (M SC ) in a range from about 0.02 M e B to about 2 M e B , wherein M e B is the entanglement molecular of said side chains, and at least about 95 weight % of said side chain has a para-alkyl styrene content within about 10 weight % of the average para-alkyl styrene content polymer.
Claim 3
Dependent Claim
17 words
The graft polymer of claim 1, wherein said side chains comprise polymer selected from anionically polymerizable monomers.
Claim 4
Dependent Claim
17 words
The graft polymer of claim 1, wherein M MCS is above about 0.1 M e A .
Claim 5
Dependent Claim
17 words
The graft polymer of claim 1, wherein M MCS is above about 0.5 M e A .
Claim 6
Dependent Claim
17 words
The graft polymer of claim 1, wherein M SC is above about 0.1 M e B .
Claim 7
Dependent Claim
17 words
The graft polymer of claim 1, wherein M SC is above about 0.5 M e B .
Claim 8
Dependent Claim
15 words
The graft polymer of claim 1, wherein M e A is at least about 1000.
Claim 9
Dependent Claim
15 words
The graft polymer of claim 1, wherein M e B is at least about 1000.
Claim 10
Dependent Claim
29 words
The graft polymer of claim 1, wherein the weight average molecular weight of said main chain (M w A ) is greater than about 3 M e A .
Claim 11
Dependent Claim
19 words
The graft polymer of claim 9, wherein M w A is greater than about 5 M e A .
Claim 12
Dependent Claim
19 words
The graft polymer of claim 9, wherein M w A is greater than about 10 M e A .
Claim 13
Dependent Claim
27 words
The graft polymer of claim 9, wherein said weight average molecular weight of said main chain is in a range of from about 25,000 to about 500,000.
Claim 14
Dependent Claim
27 words
The graft polymer of claim 9, wherein said weight average molecular weight of said main chain is in a range of from about 50,000 to about 250,000.
Claim 15
Dependent Claim
35 words
The graft polymer of claim 9, wherein a ratio of M w A /M n A , wherein M n A is the number average molecular weight of said main chain, is less than 6.
Claim 16
Dependent Claim
20 words
The graft polymer of claim 14, wherein said ratio M w A /M n A is less than about 4.
Claim 17
Dependent Claim
20 words
The graft polymer of claim 14, wherein said ratio M w A /M n A is less than about 2.5.
Claim 18
Dependent Claim
20 words
The graft polymer of claim 14, wherein said ratio M w A /M n A is less than about 2.
Claim 19
Dependent Claim
35 words
The graft polymer of claim 1, wherein a ratio of weight average molecular weight (M SC ) to number average molecular weight (M n B ) of said side chains is less than about 6.
Claim 20
Dependent Claim
20 words
The graft polymer of claim 18, wherein said ratio of M SC /M n B is less than about 2.
Claim 21
Dependent Claim
20 words
The graft polymer of claim 18, wherein said ratio of M SC /M n B is less than about 1.5.
Claim 22
Dependent Claim
20 words
The graft polymer of claim 18, wherein said ratio of M SC /M n B is less than about 1.1.
Claim 23
Dependent Claim
22 words
The graft polymer of claim 18, wherein said ratio of M SC /M n B is from about 1.0 to about 1.05.
Claim 24
Dependent Claim
21 words
The graft polymer of claim 1, comprising an average of from about 2 to about 200 side chains per main chain.
Claim 25
Dependent Claim
21 words
The graft polymer of claim 1, comprising an average of from about 3 to about 100 side chains per main chain.
Claim 26
Dependent Claim
21 words
The graft polymer of claim 1, comprising an average of from about 4 to about 80 side chains per main chain.
Claim 27
Dependent Claim
27 words
The graft polymer of claim 1, wherein a weight average molecular weight of said main chain is in a range of from about 300 to about 25,000.
Claim 28
Dependent Claim
27 words
The graft polymer of claim 26, wherein said weight average molecular weight of said main chain is in a range of from about 1000 to about 15,000.
Claim 29
Dependent Claim
26 words
The graft polymer of claim 1, wherein a weight average molecular weight of said side chain is in a range from about 50 to about 25,000.
Claim 30
Dependent Claim
27 words
The graft polymer of claim 28, wherein said weight average molecular weight of said side chain is in a range of from about 200 to about 20,000.
Claim 31
Dependent Claim
16 words
The graft polymer of claim 1, wherein said isoolefin comprises isobutylene and said para-alkylstyrene comprises para-methylstyrene.
Claim 32
Dependent Claim
52 words
The graft polymer of claim 1, wherein said isoolefin and said para-alkylstyrene are present in said grafted polymer in amounts such that said isoolefin comprises from about 10 to 99.5 percent by weight of said polymer and said para-alkylstyrene comprises from about 0.5 to 90 percent by weight of said graft polymer.
Claim 33
Dependent Claim
11 words
The graft polymer of claim 1, wherein said para-alkylstyrene comprises para-methylstyrene.
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| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
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| 3.5 Years (Year 4) | 1996-04-26 | 1996-10-26 | 1997-04-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2000-04-26 | 2000-10-26 | 2001-04-27 | $3760.00 | Window Closed / Lapsed |
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