US5760106A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sealant method of epoxy resin-clay composites
Assignee: Michigan State University
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Filing: 1996-09-13
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Granted: 1998-06-02
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Expires: 2016-09-13
Abstract
Abstract A clay-resin composition of a cured epoxy resin and a layered clay with the cured epoxy resin in the galleries of the clay by intercalation or exfoliation. The preferred epoxy resins are flexible and usually elastic because of the epoxy resin and/or curing agent which is used. The result is a composite which can have superior tensile strength and/or solvent resistance as compared to the cured epoxy resin without the clay or with the clay but without the intercalation or exfoliation. The flexible composites are particularly useful for seals and other thin layer applications.
Inventors
- 👤 Thomas J. Pinnavaia
- 👤 Tie Lan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 20:51
CPC Classifications
C; C09; C09K; C09K3/00; C09K3/10; C08; C08G; C08G59/00; C08G59/18; C08G59/40; C08G59/50; C08K; C08K3/00; C08K3/34; C08K3/346; C08K9/00; C08K9/04; C08L; C08L63/00; C09K2200/00; C09K2200/02; C09K2200/0243; C09K2200/0252; C09K2200/04; C09K2200/0458; C09K2200/06; C09K2200/0645; C09K2200/0647
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
111 words
In a method for providing a flexible sealant in an apparatus the improvement which comprises: providing as the sealant a resin-clay composite composition which comprises: (a) a cured epoxy resin; and (b) a smectite clay having layers with the cured epoxy resin separating the layers, the galleries containing the cured epoxy resin and organic onium cations wherein the onium cations are protonated unsubstituted alkyl ammonium cations containing 3 to 22 carbon atoms in the alkyl ammonium cations, wherein the composition contains between about 5 and 50 weight percent of the clay, and wherein the average separation between the clay layers corresponds to a gallery height of 7 Å to 300 Å.
Claim 2
Dependent Claim
111 words
In a method for providing a flexible sealant in an apparatus the improvement which comprises: providing as the sealant a resin-clay composite composition which comprises: (a) a cured epoxy resin; and (b) a smectite clay having layers with the cured epoxy resin separating the layers, the galleries containing the cured epoxy resin and organic onium cations wherein the onium cations are protonated unsubstituted alkyl ammonium cations containing 3 to 22 carbon atoms in the alkyl ammonium cations, wherein the composition contains between about 5 and 50 weight percent of the clay, and wherein the average separation between the clay layers corresponds to a gallery height of 7 Å to 300 Å.
Claim 3
Dependent Claim
25 words
The composition of claim 1 wherein an epoxy resin precursor is cured with a diamine as the curing agent to provide the cured epoxy resin.
Claim 4
Dependent Claim
28 words
The method claim 1 wherein a diglycidyl ether of bisphenol A monomer is cured with a polyoxypropylene diamine as the curing agent to provide the cured epoxy resin.
Claim 5
Dependent Claim
22 words
The method of claim 1 wherein a Novolac epoxy prepolymer is cured with a polyoxypropylene diamine to provide the cured epoxy resin.
Claim 6
Dependent Claim
25 words
The method of claim 1 wherein a diglycidyl ether of bisphenol F monomer is cured with a polyoxypropylene diamine to provide the cured epoxy resin.
Claim 7
Dependent Claim
24 words
The method of claim 1 wherein a diglycidyl polyalkylene ether epoxy prepolymer is cured with a polyoxypropylene diamine to provide the cured epoxy resin.
Claim 8
Dependent Claim
39 words
The method of claim 1 wherein an epoxy monomer or prepolymer is cured with a polyoxypropylene diamine having a formula: ##STR13## wherein x is between about 4 and 40 as the curing agent to provide the cured epoxy resin.
Claim 9
Dependent Claim
44 words
The method of claim 1 wherein the epoxy resin is a diglycidyl ether of bisphenol A monomer cured with a polyoxypropylene diamine having a formula: ##STR14## wherein x is between about 4 and 40 as the curing agent to provide the cured epoxy resin.
Claim 10
Dependent Claim
36 words
The method of claim 1 wherein the epoxy resin is derived from a diglycidyl ether of bisphenol F monomer cured with a polyoxypropylene diamine having a formula: ##STR15## wherein x is between about 4 and 40.
Claim 11
Dependent Claim
32 words
The method of claim 1 wherein the epoxy resin is derived from a Novolac polymer cured with a polyoxypropylene diamine having a formula: ##STR16## wherein x is between about 4 and 40.
Claim 12
Dependent Claim
33 words
The method of claim 1 wherein the epoxy resin is a diglycidyl polyalkylene ether epoxy resin cured with a polyoxypropylene diamine having a formula: ##STR17## wherein x is between about 4 and 40.
Claim 13
Dependent Claim
33 words
The method of claim 1 wherein the clay is selected from the group consisting of smectite clay minerals, montmorillonite, hectorite, saponite, nontronite or beidellite, and synthetic derivatives, fluorohectorite, laponite, taeniolite or tetrasilicic mica.
Claim 14
Dependent Claim
15 words
The method of claim 1 wherein the clay is a synthetic mixed layer clay mica-montmorillonite.
References Cited (Backward Citations)
US3511725A
Cited
US3432370A
Cited
US3847726A
Cited
CA1004859A
Cited
US4683259A
Cited
US4889885A
Cited
US5108832A
Cited
WO1993004118A1
Cited
WO1993004117A1
Cited
US5554670A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2001-06-01 | 2001-12-01 | 2002-06-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2005-06-01 | 2005-12-01 | 2006-06-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2009-06-01 | 2009-12-01 | 2010-06-02 | $7700.00 | Window Closed / Lapsed |