Patent FR2385654A1 successfully refreshed from Google Patents.
US5840796A
Expired / Lapsed
US
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Polymer nanocomposites
Assignee: Xerox Corp
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Filing: 1997-05-09
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Granted: 1998-11-24
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Expires: 2017-05-09
Abstract
Abstract There is disclosed a polymer nanocomposite including a mica-type layered silicate and a fluoroelastomer, wherein the nanocomposite has a structure selected from the group consisting of an exfoliated structure and an intercalated structure.
Inventors
- 👤 Santokh S. Badesha
- 👤 Arnold W. Henry
- 👤 James B. Maliborski
- 👤 Clifford O. Eddy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 18:26
CPC Classifications
C; C08; C08K; C08K3/00; C08K3/34
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
51 words
A polymer nanocomposite comprising a mica layered silicate and a fluoroelastomer, wherein the nanocomposite has a structure selected from the group consisting of an exfoliated structure and an intercalated structure wherein the fluoroelastomer is a copolymer or terpolymer consisting of monomers selected from the group consisting of vinylidenefluoride, hexafluoropropylene, and tetrafluoroethylene.
Claim 2
Dependent Claim
51 words
A polymer nanocomposite comprising a mica layered silicate and a fluoroelastomer, wherein the nanocomposite has a structure selected from the group consisting of an exfoliated structure and an intercalated structure wherein the fluoroelastomer is a copolymer or terpolymer consisting of monomers selected from the group consisting of vinylidenefluoride, hexafluoropropylene, and tetrafluoroethylene.
Claim 3
Dependent Claim
26 words
The nanocomposite of claim 1, wherein the nanocomposite has the exfoliated structure where the delaminated layers of the mica layered silicate are dispersed in the fluoroelastomer.
Claim 4
Dependent Claim
24 words
The nanocomposite of claim 1, wherein the nanocomposite has the intercalated structure where the fluoroelastomer is inserted between the layers of the mica silicate.
Claim 5
Dependent Claim
25 words
The nanocomposite of claim 1, wherein the mica layered silicate has an aspect ratio of length to thickness ranging from about 50 to about 1000.
Claim 6
Dependent Claim
31 words
The nanocomposite of claim 1, wherein the mica layered silicate is present in an amount ranging from about 1% to about 50% by weight based on the weight of the nanocomposite.
Claim 7
Dependent Claim
31 words
The nanocomposite of claim 1, wherein the mica layered silicate is present in an amount ranging from about 5% to about 20% by weight based on the weight of the nanocomposite.
Claim 8
Dependent Claim
15 words
The nanocomposite of claim 1, wherein the mica layered silicate is montmorillonite, bentonite, or hectorite.
Claim 9
Dependent Claim
23 words
The nanocomposite of claim 1, wherein the nanocomposite is prepared by mixing at an elevated temperature the fluoroelastomer and the mica layered silicate.
Claim 10
Dependent Claim
13 words
The nanocomposite of claim 8, wherein the mixing is accompanied by shearing forces.
Claim 11
Dependent Claim
12 words
The nanocomposite of claim 8, wherein the mixing is accomplished by milling.
Claim 12
Dependent Claim
17 words
The nanocomposite of claim 8, wherein the elevated temperature and the mixing results in the intercalated structure.
Claim 13
Dependent Claim
17 words
The nanocomposite of claim 11, wherein the elevated temperature ranges from about 110° to about 150° F.
Claim 14
Dependent Claim
17 words
The nanocomposite of claim 11, wherein the elevated temperature ranges from about 120° to about 130° F.
Claim 15
Dependent Claim
17 words
The nanocomposite of claim 8, wherein the elevated temperature and the mixing results in the exfoliated structure.
Claim 16
Dependent Claim
14 words
The nanocomposite of claim 8, wherein the elevated temperature is above about 150° F.
Claim 17
Dependent Claim
17 words
The nanocomposite of claim 8, wherein the elevated temperature ranges from about 150° to about 200° F.
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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) | 2001-11-23 | 2002-05-25 | 2002-11-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2005-11-23 | 2006-05-25 | 2006-11-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2009-11-23 | 2010-05-25 | 2010-11-24 | $7700.00 | Window Closed / Lapsed |