Patent US4818435A successfully refreshed from Google Patents.
US4818435A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Aqueous suspension of delaminated vermiculite
Assignee: Hercules LLC
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Filing: 1987-03-12
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Granted: 1989-04-04
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Expires: 2007-03-12
Abstract
Abstract It has been found that water stable articles, such as films and sheets, can be prepared from chemically delaminated vermiculite platelets if radical or ionically polymerizable organo-substituted onium salts are ionically bonded to the platelets and the resulting system cured.
Inventors
- 👤 Alexander Lukacs, III
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 05:42
CPC Classifications
C; C04; C04B; C04B14/00; C04B14/02; C04B14/04; C04B14/20; C04B14/206; C04B14/208; Y; Y10; Y10S; Y10S106/00; Y10S106/03
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
29 words
In a composition comprising an aqueous suspension of vermiculite platelets, wherein the improvement comprises the platelets being ionically bonded to organo-substituted onium ions polymerizable by radical or ionic means.
Claim 2
Dependent Claim
29 words
In a composition comprising an aqueous suspension of vermiculite platelets, wherein the improvement comprises the platelets being ionically bonded to organo-substituted onium ions polymerizable by radical or ionic means.
Claim 3
Dependent Claim
18 words
The composition of claim 1, wherein the maximum particle size of the vermiculite platelets is about 200 microns.
Claim 4
Dependent Claim
18 words
The composition of claim 1, wherein the aspect ratio of the vermiculite platelets is at least about 10.
Claim 5
Dependent Claim
47 words
The composition of claim 1, wherein the organo-substituted onium ions are selected from the group consisting of crotyltriethylammonium, allylammonium, methacryloxyethyltrimethylammonium, 3-acryloxyneopentyltrimethylammonium, 2-methacryloxyethyl-t-butylammonium, diallylammonium, diallyldimethylammonium, allyldimethylsulfonium, methacrylamidopropyltrimethylammonium, acrylamidopropyltrimethylammonium, butenyltrimethylammonium, vinylpyridinium and substituted vinylpyridinium, vinylbenzyldimethylsulfonium, vinylbenzyltrimethylammonium, 2,3-epoxypropyltrimethylammonium, triethylvinylphosphonium, tributylvinylphosphonium, α-ammonium-γ-butyrolactone, glycidyltrimethylammonium, 1-methyl-1-tert butylaziridinium, 1-ethyl-1,3,3-trimethyl azetidinium ions, and mixtures thereof.
Claim 6
Dependent Claim
13 words
The composition of claim 4, wherein the organo-substituted onium ions are allylammonium ions.
Claim 7
Dependent Claim
13 words
The composition of claim 4, wherein the organo-substituted onium ions are diallyldimethylammonium ions.
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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) | 1992-04-03 | 1992-10-03 | 1993-04-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-04-03 | 1996-10-03 | 1997-04-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-04-03 | 2000-10-03 | 2001-04-04 | $7700.00 | Window Closed / Lapsed |