US4094690A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Liquid composition
Assignee: Imperial Chemical Industries Ltd
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Filing: 1976-08-30
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Granted: 1978-06-13
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Expires: 1996-08-30
Abstract
Abstract A liquid composition comprising a solution of a water-soluble metal compound convertible to metal oxide and a smaller amount of a hydrolytically stable water-soluble organic silicone which may be used to prepare binders, coatings and shaped bodies, especially fibres, of intimate mixtures of metal oxide and silica. Preferred silicones are polysiloxane, polyoxyalkylene copolymers and preferred metal compounds are salts of aluminium and zirconium. Phase-stabilised alumina, especially in the form of fibres, is a particularly important embodiment; transitional alumina can be stabilised up to 1400 DEG C without the appearance of separate phases of mullite and crystalline silica.
Inventors
- 👤 Michael John Morton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 15:38
CPC Classifications
C; C01; C01B; C01B33/00; C01B33/20; C01B13/00; C01B13/14; C04; C04B; C04B14/00; C04B14/38; C04B35/00; C04B35/622; C04B35/62227; C04B35/62231; C04B35/62236; C04B35/6224; D; D01; D01D; D01D5/00; D01D5/08; D01D5/098; D01D5/0985; C01P; C01P2004/00; C01P2004/10; C01P2006/00; C01P2006/12; C01P2006/14; Y; Y10; Y10S; Y10S264/00; Y10S264/19
Claims Analysis
Total Claims: 33
Claim 1
Independent Claim
121 words
A process for the preparation of a fiber comprising a metal oxide and silica comprising the steps of (a) providing a liquid composition having a viscosity of greater than 0.1 posise comprising an aqueous solution of a water-soluble metal compound and a water-soluble organic silicon compound which is stable to hydrolysis in the liquid composition and in which silicon atoms are attached to carbon atoms directly or through an oxygen atom and wherein the concentration of the metal compound expressed as equivalent metal oxide exceeds the concentration of the silicon compound expressed as silicon dioxide; (b) fiberizing the said liquid composition to form fibers; and (c) heating the said fibers to decompose the metal compound and the silicon compound to oxides.
Claim 2
Dependent Claim
121 words
A process for the preparation of a fiber comprising a metal oxide and silica comprising the steps of (a) providing a liquid composition having a viscosity of greater than 0.1 posise comprising an aqueous solution of a water-soluble metal compound and a water-soluble organic silicon compound which is stable to hydrolysis in the liquid composition and in which silicon atoms are attached to carbon atoms directly or through an oxygen atom and wherein the concentration of the metal compound expressed as equivalent metal oxide exceeds the concentration of the silicon compound expressed as silicon dioxide; (b) fiberizing the said liquid composition to form fibers; and (c) heating the said fibers to decompose the metal compound and the silicon compound to oxides.
Claim 3
Dependent Claim
30 words
A process as claimed in claim 1 wherein the weight ratio of metal compound expressed as equivalent metal oxide to silicon compound expressed as silicon dioxide is at leat 85:15.
Claim 4
Dependent Claim
37 words
A process as claimed in claim 1 wherein the metal of the metal compound is selected from the group consisting of aluminum, iron, zirconium, titanium, beryllium, chromium, magnesium, thorium, uranium, yttrium, nickel, vanadium, molybdenum, tungsten and cobalt.
Claim 5
Dependent Claim
32 words
A process as claimed in claim 1 wherein the metal compound is selected from the group consisting of metal hydroxide, halide, oxyhalide, carbonate, nitrate, phosphate, sulphate and salts of an organic acid.
Claim 6
Dependent Claim
28 words
A process as claimed in claim 4 wherein the salt of an organic acid is selected from the group consisting of a basic formate, acetate, oxalate and propionate.
Claim 7
Dependent Claim
38 words
A process as claimed in claim 1 wherein the metal compound is selected from the group consisting of aluminum oxychloride, basic aluminum acetate, basic alumium formate, zirconium oxychloride, basic zirconium acetate, basic zirconium nitrate and basic zirconium formate.
Claim 8
Dependent Claim
28 words
A process as claimed in claim 1 wherein the silicon compound contains a silanol or silanolate group or a water-solubilizing carbon functional group or mixtures of these groups.
Claim 9
Dependent Claim
21 words
A process as claimed in claim 1 wherein the silicon compound contains a siloxane group and a water-solubilizing carbon functional group.
Claim 10
Dependent Claim
16 words
A process as claimed in claim 8 wherein the silicon compound is a water-soluble polysiloxane-polyoxyalkylene compolymer.
Claim 11
Dependent Claim
22 words
A process as claimed in claim 9 wherein the polysiloxane and polyoxyalkylene blocks of the polysiloxane-polyoxyalkylene copolymer are linked by Si--C linkages.
Claim 12
Dependent Claim
19 words
A process as claimed in claim 9 wherein the polysiloxane block of th polysiloxane-polyoxyalkylene copolymer is a polymethylsiloxane block.
Claim 13
Dependent Claim
24 words
A process as claimed in claim 9 wherein the molecular weight of the polysiloxane block of the polysiloxane-polyoxyalkylene copolymer is from 220 to 20,000.
Claim 14
Dependent Claim
18 words
A process as claimed in claim 9 wherein the polyoxyalkylene block of the polysiloxane-polyoxyalkylene copolymer comprises oxyethylene groups.
Claim 15
Dependent Claim
23 words
A process as claimed in claim 13 wherein the ratio of carbon atoms to oxygen atoms in the oxyalkylene chain is below 3:1.
Claim 16
Dependent Claim
29 words
A process as claimed in claim 9 wherein the polyoxyalkylene block comprises additionally oxypropylene groups and the oxyethylene groups comprise at least 305 by weight of the polyoxyalkylene block.
Claim 17
Dependent Claim
18 words
A process as claimed in claim 11 wherein the ratio of polysiloxane to polyoxyalkylene is less than 2.5:1.
Claim 18
Dependent Claim
18 words
A process as claimed in claim 1 wherein the liquid composition additionally comprises a water-soluble silicon-free organic polymer.
Claim 19
Dependent Claim
28 words
A process as claimed in claim 17 wherein the organic polymer is selected from the group consisting of partially-hydrolyzed polyvinyl acetate, polyvinyl alcohol, polyvinyl pyrrolidone or polyethylene oxide.
Claim 20
Dependent Claim
24 words
A process as claimed in claim 1 wherein the fiber is dried prior to decomposition of the metal and silicon compounds to their oxides.
Claim 21
Dependent Claim
26 words
A process as claimed in claim 1 wherein the fibers are heated at a temperature of 500° to 1200° C for one minute to one hour.
Claim 22
Dependent Claim
18 words
A fiber comprising a metal oxide and silica whenever prepard by a process as claimed in claim 1.
Claim 23
Dependent Claim
21 words
A fiber as claimed in claim 21 wherein the ratio by weight of metal oxide to silica is at least 85:15.
Claim 24
Dependent Claim
33 words
A process as claimed in claim 1 wherein fiberizing is effected by extrusion of the liquid composition at a viscosity of 100 to 1000 poise through a spinneret to form a continuous filament.
Claim 25
Dependent Claim
13 words
A process as claimed in claim 23 wherein fiberizing is effected by blowing.
Claim 26
Dependent Claim
19 words
A process as claimed in claim 24 wherein the liquid composition has a viscosity of 0.1 to 100 poise.
Claim 27
Dependent Claim
47 words
A process as claimed in claim 25 wherein blowing comprises extruding the liquid composition through one or more apertures into at least one gas stream having a component of high velocity in the direction of travel of the extruded composition whereby the extruded composition is drawn down.
Claim 28
Dependent Claim
32 words
A process as claimed in claim 26 wherein the liquid composition is extruded into two gas streams which converge at or near the point when the composition is extruded from the aperture.
Claim 29
Dependent Claim
12 words
A process as claimed in claim 27 wherein the gas is air.
Claim 30
Dependent Claim
19 words
A process as claimed in claim 28 wherein the air is at a relative humidity of greater than 80%.
Claim 31
Dependent Claim
19 words
A process as claimed in claim 1 wherein the fibers are heated with steam at 250° to 500° C.
Claim 32
Dependent Claim
28 words
A process as claimed in claim 30 wherein the fibers are subjected to the action of ammonia or a volatile amine before or with the heating with steam.
Claim 33
Dependent Claim
39 words
A process as claimed in claim 31 wherein the fibers are further heated at a temperature of 1000° to 2000° C to change the crystalline form of the oxide phases present in said fibers or to sinter the same.
References Cited (Backward Citations)
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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) | 1981-06-12 | 1981-12-12 | 1982-06-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-06-12 | 1985-12-12 | 1986-06-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-06-12 | 1989-12-12 | 1990-06-13 | $7700.00 | Window Closed / Lapsed |