US5204078A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for producing fluorine mica
Assignee: National Institute of Advanced Industrial Science and Technology
•
Filing: 1991-09-25
•
Granted: 1993-04-20
•
Expires: 2011-09-25
Abstract
Abstract The present invention is a method for producing swellable or nonswellable fluorine mica at a relatively lower temperature by heating a powdery mixture comprising 10 to 35% by weight of an alkali silicofluoride as the main component optionally together with an alkali fluoride and the balance of talc. This fluorine mica is used for pigments, etc.
Inventors
- 👤 Hiroshi Tateyama
- 👤 Kinue Tsunematsu
- 👤 Kunio Kimura
- 👤 Hideharu Hirosue
- 👤 Kazuhiko Jinnai
- 👤 Takashi Furusawa
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 00:15
CPC Classifications
C; C01; C01B; C01B33/00; C01B33/20; C01B33/36; C01B33/38; C01B33/42; C01B33/425; C01B33/26; C01B33/28; Y; Y10; Y10S; Y10S106/00; Y10S106/03; Y10T; Y10T428/00; Y10T428/29; Y10T428/2911
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
85 words
A method for producing fluorine mica represented by the formula: αMF.β(aMgF.sub.2.bMgO).γSiO.sub.2 wherein M represents at least one alkali metal selected from the group consisting of sodium atom and potassium atom, α, β, γ, a and b each represent a coefficient satisfying the relationships of 0.1≦α≦2, 2≦β≦3, 3≦γ≦4 and a+b=1, which comprises heating a fine powdery mixture comprising 10 to 35% by weight of an alkali silicofluoride represented by the formula: M.sub.2 SiF.sub.6 and the balance being talc to a temperature of 700° to 1000° C.
Claim 2
Independent Claim
85 words
A method for producing fluorine mica represented by the formula: αMF.β(aMgF.sub.2.bMgO).γSiO.sub.2 wherein M represents at least one alkali metal selected from the group consisting of sodium atom and potassium atom, α, β, γ, a and b each represent a coefficient satisfying the relationships of 0.1≦α≦2, 2≦β≦3, 3≦γ≦4 and a+b=1, which comprises heating a fine powdery mixture comprising 10 to 35% by weight of an alkali silicofluoride represented by the formula: M.sub.2 SiF.sub.6 and the balance being talc to a temperature of 700° to 1000° C.
Claim 3
Dependent Claim
54 words
The method for producing fluorine mica according to claim 1, wherein the alkali silicofluoride is Na 2 SiF 6 , the heating temperature is 700° to 900° C. and the product is αNaF.β(aMgF 2 .bMgO).γSiO 2 where α, β, γ, a and b are the same as defined in claim 1, and is swellable.
Claim 4
Dependent Claim
20 words
The method for producing fluorine mica according to claim 1, wherein the alkali silicofluoride is Na 2 SiF 6 .
Claim 5
Dependent Claim
47 words
The method for producing fluorine mica according to claim 1, wherein K 2 SiF 6 is the alkali silicofluoride, and the product is represented by αKF.β(aMgF 2 .bMgO).γSiO 2 wherein α, β, γ, a and b are the same as defined in claim 1, and is non-swellable.
Claim 6
Dependent Claim
77 words
The method for producing fluorine mica according to claim 4, wherein said fine powdery mixture comprises 10 to 35% by weight of a mixture of K 2 SiF 6 and KF containing K 2 SiF 6 at a ratio of 25% by weight or more and the balance being talc, and the product is represented by the formula: αKF.β(aMgF.sub.2.bMgO).γSiO.sub.2 wherein α, β, γ, a and b are the same as defined in claim 1, and is non-swellable.
Claim 7
Independent Claim
99 words
A method for producing a non-swellable fluorine mica represented by the formula: αMF.β (A MgF 2 .b MgO).δAl 2 O 3 γSiO wherein M represents at least one alkali metal selected from the group consisting of sodium atom and potassium atom, α, β, γ, δ, a and b each represent a coefficient satisfying the relationships of 0.1≦α≦2, 2≦β≦3, 3≦γ≦4, O≦δ≦1, and a+b=1, which comprises heating a fine powdery mixture comprising 10 to 35% by weight of a mixture of M 2 SiF 6 , 25% by weight or less of Al 2 O 3 and the balance being talc.
Claim 8
Independent Claim
99 words
A method for producing a non-swellable fluorine mica represented by the formula: αMF.β (A MgF 2 .b MgO).δAl 2 O 3 γSiO wherein M represents at least one alkali metal selected from the group consisting of sodium atom and potassium atom, α, β, γ, δ, a and b each represent a coefficient satisfying the relationships of 0.1≦α≦2, 2≦β≦3, 3≦γ≦4, O≦δ≦1, and a+b=1, which comprises heating a fine powdery mixture comprising 10 to 35% by weight of a mixture of M 2 SiF 6 , 25% by weight or less of Al 2 O 3 and the balance being talc.
Claim 9
Dependent Claim
98 words
The method for producing fluorine mica according to claim 6, wherein said fine powdery mixture comprises 10 to 35% by weight of a mixture of K 2 SiF 6 and KF containing K 2 SiF 6 at a ratio of 25% by weight or more, 10 to 20% by weight of Al 2 O 3 and the balance being talc, and the product is represented by the formula: αKF.β(aMgF.sub.2.bMgO).δAl.sub.2 O.sub.3.γSiO.sub.2 wherein α, β, γ, a and b are the same as defined in claim 1, and δ represents a coefficient satisfying the relation of 0≦δ≦1, and is non-swellable.
Claim 10
Dependent Claim
22 words
The method for producing fluorine mica according to claim 7, wherein the mixture has a composition of talc:KF:K 2 SiF 6 =80:10:10.
Claim 11
Dependent Claim
25 words
The method for producing fluorine mica according to claim 6, wherein M 2 SiF 6 is K 2 SiF 6 and the product is non-swellable.
Claim 12
Dependent Claim
41 words
The method for producing fluorine mica according to claim 6, wherein the Al 2 O 3 is in an amount of 10 to 20% by weight and the Al 2 O 3 has a particle size of 2 μm or less.
Claim 13
Dependent Claim
30 words
The method for producing fluorine mica according to claim 6, wherein M is K and the mixture has a composition of talc:K 2 SiF 6 :Al 2 O 3 =70:20:10.
Claim 14
Dependent Claim
32 words
The method for producing fluorine mica according to claim 1, wherein the fine powdery mixture comprises 15 to 30% by weight of said alkali silicofluoride and said alkali silicofluoride is sodium silicofluoride.
Claim 15
Dependent Claim
18 words
The method for producing fluorine mica according to claim 12, wherein the temperature is 700° to 900° C.
Claim 16
Dependent Claim
26 words
The method for producing fluorine mica according to claim 13, wherein the particle sizes of the talc and the sodium silicofluoride are 2 μm or less.
Claim 17
Dependent Claim
41 words
The method for producing fluorine mica according to claim 12, wherein the mixture comprises 20% by weight of said silicofluoride; said silicofluoride has an average particle size of 2 μm; and said talc having an average particle size of 2 μm.
References Cited (Backward Citations)
US3001571A
Cited
US3057741A
Cited
US4067819A
Cited
JPS5782114A
Cited
JPS591215A
Cited
US4486546A
Cited
JPS61201616A
Cited
US5049237A
Cited
US5023065A
Cited
US5094852A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1996-04-19 | 1996-10-19 | 1997-04-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2000-04-19 | 2000-10-19 | 2001-04-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2004-04-19 | 2004-10-19 | 2005-04-20 | $7700.00 | Window Closed / Lapsed |