US4234380A
Expired / Lapsed
US
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Polymeric silicate material and a method of manufacturing the same
Assignee: Advanced Mineral Research AB
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Filing: 1978-07-07
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Granted: 1980-11-18
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Expires: 1998-07-07
Abstract
Abstract A polymeric silicate material having a substantially fibre- or flake-like microstructure is manufactured from a starting material comprising mainly natural or synthetic silicate mineral e.g., Olivine and/or Granate (garnet), having a hardness exceeding the value 6 on the Moh's hardness scale and which are compound(s) having the general formulae: 2(R.sup.I O)·SiO.sub.2 wherein R I may be the same or different and is Mg and/or Fe; and 3(R.sup.II O)·R.sub.2.sup.III O.sub.3 ·3 SiO.sub.2 wherein R II may be the same or different and is Mg, Fe and/or Ca; and R III is Al or Fe, by finely dividing said material to a specific surface area of at least 15,000 cm 2 /cm 3 , measured according to Blaine, and subsequently hydrothermally treating the resultant powderous starting material at a temperature of approximately 175°-325° C. and a pH of at least 9 in the presence of water or condensed steam.
Inventors
- 👤 Per G. Kihlstedt
- 👤 Hedvig E. B. Hassler
- 👤 Kai deen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 03:20
CPC Classifications
D; D21; D21H; D21H5/00; D21H5/12; D21H5/18; C; C01; C01B; C01B33/00; C01B33/20; C01B33/26; C04; C04B; C04B18/00; C04B18/02; C04B18/021; C04B28/00; C04B28/18; C04B28/184; D21H13/00; D21H13/36; D21H13/38
Claims Analysis
Total Claims: 25
Claim 1
Independent Claim
180 words
A particulate silicate material having substantially a fibre- or flake-like microstructure which is suitable for use as an insulating material and as a substitute for organic fibres in paper- and board-like webs and sheets, said particulate silicate material being formed by hydrothermally treating a slurry of a pulverent staring material at a temperature of approximately 175° to 325° C. and at a pH of at least 9 in the presence of water or condensed steam, said starting material having a specific surface of at least 40,000 cm 2 /cm 3 (measured according to Blaine) and consisting essentially of a natural or synthetic silicate material having a hardness exceeding 6 on the Moh's hardness scale and being at least one of the compounds having the general formulae 2(R.sup.I O).SiO.sub.2 wherein R I may be the same or different and is selected from the group consisting of Mg and Fe; and 3(R.sup.II O).R.sub.2.sup.III O.sub.3.3SiO.sub.2 wherein R II may be the same or different and is selected from the group consisting of Mg, Fe, and Ca, and R III is Al or Fe.
Claim 2
Dependent Claim
180 words
A particulate silicate material having substantially a fibre- or flake-like microstructure which is suitable for use as an insulating material and as a substitute for organic fibres in paper- and board-like webs and sheets, said particulate silicate material being formed by hydrothermally treating a slurry of a pulverent staring material at a temperature of approximately 175° to 325° C. and at a pH of at least 9 in the presence of water or condensed steam, said starting material having a specific surface of at least 40,000 cm 2 /cm 3 (measured according to Blaine) and consisting essentially of a natural or synthetic silicate material having a hardness exceeding 6 on the Moh's hardness scale and being at least one of the compounds having the general formulae 2(R.sup.I O).SiO.sub.2 wherein R I may be the same or different and is selected from the group consisting of Mg and Fe; and 3(R.sup.II O).R.sub.2.sup.III O.sub.3.3SiO.sub.2 wherein R II may be the same or different and is selected from the group consisting of Mg, Fe, and Ca, and R III is Al or Fe.
Claim 3
Dependent Claim
58 words
A material according to claim 1, characterized in that the stoichiometric composition of the starting material is adjusted to one which is substantially optimal for the formation of a hydrous silicate material having a fibre- and/or flake-like crystallization structure, by adding at least one substance from the group of silica, iron oxides and hydroxides of MgO and CaO.
Claim 4
Dependent Claim
26 words
A material according to claim 1, characterized in that the starting material is substantially olivine with a silica addition of up to 15 percent by weight.
Claim 5
Dependent Claim
31 words
A material according to claim 3, characterized in that the starting material is also given an addition of up to 3 percent by weight fired and slaked magnesite, dolomite or limestone.
Claim 6
Dependent Claim
33 words
A material according to claim 1, characterized in that the starting material is substantially granate mineral with an addition of up to 10 percent by weight fired and slaked magnesite, dolomite or limestone.
Claim 7
Dependent Claim
25 words
A material according to claim 1, characterized in that the starting material is given an addition of up to 5 percent by weight pyrite cinders.
Claim 8
Dependent Claim
21 words
A material according to claim 1, characterized in that the starting material is substantially a mixture of olivine and granate mineral.
Claim 9
Independent Claim
182 words
A method for manufacturing a particulate silicate material having a substantially fibre- or flake-like microstructure which is suitable for use as an insulating material and as a substitute for organic fibres in paper- and board-like webs and sheets, comprising hydrothermally treating a slurry of a starting material at a temperature of approximately 175° to 325° C. and at a pH of at least 9 in the presence of water or condensed steam, said starting material consisting essentially of natural or synthetic silicate material having a hardness exceeding 6 on the Moh's hardness scale and being at least one of the compounds having the general formulae 2(R.sup.I O).SiO.sub.2 wherein R I may be the same or different and is selected from the group consisting of Mg and Fe; and 3(R.sup.II O).R.sub.2.sup.III O.sub.3.3SiO.sub.2 wherein R II may be the same or different and is selected from the group consisting of Mg, Fe, and Ca, and R III is Al or Fe, said starting material being finely divided to a specific surface area of at least 40,000 cm 2 /cm 3 (measured according to Blaine).
Claim 10
Independent Claim
182 words
A method for manufacturing a particulate silicate material having a substantially fibre- or flake-like microstructure which is suitable for use as an insulating material and as a substitute for organic fibres in paper- and board-like webs and sheets, comprising hydrothermally treating a slurry of a starting material at a temperature of approximately 175° to 325° C. and at a pH of at least 9 in the presence of water or condensed steam, said starting material consisting essentially of natural or synthetic silicate material having a hardness exceeding 6 on the Moh's hardness scale and being at least one of the compounds having the general formulae 2(R.sup.I O).SiO.sub.2 wherein R I may be the same or different and is selected from the group consisting of Mg and Fe; and 3(R.sup.II O).R.sub.2.sup.III O.sub.3.3SiO.sub.2 wherein R II may be the same or different and is selected from the group consisting of Mg, Fe, and Ca, and R III is Al or Fe, said starting material being finely divided to a specific surface area of at least 40,000 cm 2 /cm 3 (measured according to Blaine).
Claim 11
Dependent Claim
27 words
A method according to claim 8, characterized in that the powderous starting material is maintained suspended during at least the initial stage of the hydrothermal treatment process.
Claim 12
Dependent Claim
34 words
A method according to claim 8, characterized in that subsequent to reaching the maximum temperature of the hydrothermal treatment cycle, the material is cooled over a period of time of at least 1-3 hours.
Claim 13
Dependent Claim
27 words
A method according to claim 8, characterized in that the hydrothermal treatment process is maintained at its maximum temperature for a period of at least 1-10 hours.
Claim 14
Dependent Claim
59 words
A method according to claim 8, characterized in that the composition of the starting material is adjusted stoichiometrically to one which is substantially optimum for the formation of a hydrous silicate material having a fibre and/or flake-like crystallization structure, by adding at least one substance from the group of silica, oxides of iron and hydroxides of MgO and CaO.
Claim 15
Dependent Claim
28 words
A method according to claim 8, characterized in that there is used a starting material of mainly olivine and up to 15 percent by weight SiO 2 .
Claim 16
Dependent Claim
31 words
A method according to claim 13, characterized in that the starting material is also given an addition of up to 3 percent by weight fired and slaked magnesite, dolomite or limestone.
Claim 17
Dependent Claim
33 words
A method according to claim 8, characterized in that there is used a starting material of mainly granate mineral and up to 10 percent by weight fired and slaked magnesite, dolomite or limestone.
Claim 18
Dependent Claim
25 words
A method according to claim 8, characterized in that the starting material is given an addition of up to 5 percent by weight pyrite cinders.
Claim 19
Dependent Claim
21 words
A method according to claim 8, characterized in that the starting material used is a mixture of olivine and granate mineral.
Claim 20
Dependent Claim
18 words
A method according to claim 8, characterized in that the ingredients of the starting material are ground together.
Claim 21
Dependent Claim
32 words
A method according to claim 8, characterized in that the formed silicate material is slurried and formed on a paper machine or the like into a paper- or paper-board-like web or sheet.
Claim 22
Dependent Claim
34 words
A method according to claim 8, characterized in that the fibres or flakes formed are held apart in at least the final stage of the hydrothermal treatment process by adding thereto a caking-preventing agent.
Claim 23
Dependent Claim
29 words
A material according to claim 1, characterized in that said natural or synthetic silicate mineral is selected from the group consisting of natural olivine, synthetic olivine, and granate material.
Claim 24
Dependent Claim
21 words
A method according to claim 8, characterized in that said natural or synthetic silicate mineral is natural or synthetic granate mineral.
Claim 25
Dependent Claim
27 words
A method according to claim 11, characterized in that the hydrothermal treatment process is maintained at its maximum temperature for a period of at least 4-6 hours.
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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) | 1983-11-18 | 1984-05-19 | 1984-11-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-11-18 | 1988-05-19 | 1988-11-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-11-18 | 1992-05-19 | 1992-11-18 | $7700.00 | Window Closed / Lapsed |