US3676362A
Expired / Lapsed
US
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Method for making metal oxide sols in polar organic solvents
Assignee: EIDP Inc
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Filing: 1970-11-30
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Granted: 1972-07-11
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Expires: 1990-11-30
Abstract
Abstract Sols of Sb2O3, SnO2, TiO2 and ZrO2 in organic polar liquids are prepared by reacting a soluble salt of the metal with water and ammonia in a solution of the liquid. The reaction produces the metal oxide in colloidal dispersion and an insoluble ammonium salt, which precipitates and is filtered off. Sols in liquids which are solvents for organic polymers are used to incorporate metal oxides into the polymers to provide flame resistance and other desirable properties.
Inventors
- 👤 Paul C Yates
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 16:03
CPC Classifications
B; B01; B01J; B01J13/00; B01J13/0004; B01J13/0026; B82; B82Y; B82Y30/00; C; C01; C01G; C01G19/00; C01G19/02; C01G23/00; C01G23/04; C01G23/047; C01G23/053; C01G25/00; C01G25/02; C01G30/00; C01G30/004; C01G30/005; C08; C08K; C08K3/00; C08K3/18; C08K3/20; C08K3/22; C09; C09D; C09D17/00; C09D17/004; C09D17/007; C01P; C01P2004/00; C01P2004/30; C01P2004/32; C01P2004/60; C01P2004/64; C01P2006/00; C01P2006/80; C01P2006/82; Y; Y10; Y10S; Y10S260/00; Y10S260/24
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
33 words
Method of claim 1, wherein the amount of ammonia is between about 50 and 90 percent of that required to react with the salt whereby the sol contains residual anion of the salt.
Claim 2
Dependent Claim
10 words
Method of claim 2 wherein the salt is a chloride.
Claim 3
Dependent Claim
13 words
Method of claim 3, wherein the solvent is selected from dimethylformamide and dimethylacetamide.
Claim 4
Dependent Claim
37 words
Method of claim 4, which comprises the further step of replacing the chloride anion with another stabilizing anion by adding an acid of the second anion and sufficient ammonia to react with the remainder of the chloride.
Claim 5
Dependent Claim
22 words
Method of claim 5, wherein the acid is a member of the group consisting of formic, acetic, hydroxyacetic, salicylic, and phthalic acids.
Claim 6
Dependent Claim
73 words
Method of claim 4, wherein an alcohol selected from the aliphatic primary and secondary alcohols having less than five carbon atoms is contacted in at least equimolar quantities to the metal content of the sol and reacted with it to esterify the surface atoms of the metal oxide with said alcohol, and adding sufficient ammonia to react with substantially the remainder of the chloride present in the sol, and removing the ammonium chloride.
References Cited (Backward Citations)
US1879022A
Cited
US2585341A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-07-11 | 1976-01-10 | 1976-07-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-07-11 | 1980-01-10 | 1980-07-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-07-11 | 1984-01-10 | 1984-07-11 | $7700.00 | Window Closed / Lapsed |