WO2003085053A1 - Utilisation de silice precipitee dispersee pour l'obtention d'un colorant par melange avec un pigment inorganique, colorant ainsi obtenu et application a la coloration de materiaux ceramiques - Google Patents
Utilisation de silice precipitee dispersee pour l'obtention d'un colorant par melange avec un pigment inorganique, colorant ainsi obtenu et application a la coloration de materiaux ceramiques Download PDFInfo
- Publication number
- WO2003085053A1 WO2003085053A1 PCT/FR2003/000795 FR0300795W WO03085053A1 WO 2003085053 A1 WO2003085053 A1 WO 2003085053A1 FR 0300795 W FR0300795 W FR 0300795W WO 03085053 A1 WO03085053 A1 WO 03085053A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- dye
- silica
- use according
- inorganic pigment
- calcination
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Ceased
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B33/00—Clay-wares
- C04B33/02—Preparing or treating the raw materials individually or as batches
- C04B33/13—Compounding ingredients
- C04B33/14—Colouring matters
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/622—Forming processes; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/626—Preparing or treating the powders individually or as batches ; preparing or treating macroscopic reinforcing agents for ceramic products, e.g. fibres; mechanical aspects section B
- C04B35/62605—Treating the starting powders individually or as mixtures
- C04B35/62645—Thermal treatment of powders or mixtures thereof other than sintering
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09C—TREATMENT OF INORGANIC MATERIALS, OTHER THAN FIBROUS FILLERS, TO ENHANCE THEIR PIGMENTING OR FILLING PROPERTIES ; PREPARATION OF CARBON BLACK ; PREPARATION OF INORGANIC MATERIALS WHICH ARE NO SINGLE CHEMICAL COMPOUNDS AND WHICH ARE MAINLY USED AS PIGMENTS OR FILLERS
- C09C1/00—Treatment of specific inorganic materials other than fibrous fillers; Preparation of carbon black
- C09C1/0009—Pigments for ceramics
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09C—TREATMENT OF INORGANIC MATERIALS, OTHER THAN FIBROUS FILLERS, TO ENHANCE THEIR PIGMENTING OR FILLING PROPERTIES ; PREPARATION OF CARBON BLACK ; PREPARATION OF INORGANIC MATERIALS WHICH ARE NO SINGLE CHEMICAL COMPOUNDS AND WHICH ARE MAINLY USED AS PIGMENTS OR FILLERS
- C09C1/00—Treatment of specific inorganic materials other than fibrous fillers; Preparation of carbon black
- C09C1/28—Compounds of silicon
- C09C1/30—Silicic acid
- C09C1/3045—Treatment with inorganic compounds
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
- C01P2006/00—Physical properties of inorganic compounds
- C01P2006/12—Surface area
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
- C04B2235/30—Constituents and secondary phases not being of a fibrous nature
- C04B2235/32—Metal oxides, mixed metal oxides, or oxide-forming salts thereof, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
- C04B2235/327—Iron group oxides, their mixed metal oxides, or oxide-forming salts thereof
- C04B2235/3272—Iron oxides or oxide forming salts thereof, e.g. hematite, magnetite
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
- C04B2235/30—Constituents and secondary phases not being of a fibrous nature
- C04B2235/34—Non-metal oxides, non-metal mixed oxides, or salts thereof that form the non-metal oxides upon heating, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
- C04B2235/3418—Silicon oxide, silicic acids or oxide forming salts thereof, e.g. silica sol, fused silica, silica fume, cristobalite, quartz or flint
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
- C04B2235/50—Constituents or additives of the starting mixture chosen for their shape or used because of their shape or their physical appearance
- C04B2235/54—Particle size related information
- C04B2235/5409—Particle size related information expressed by specific surface values
Definitions
- the present invention relates to the use of precipitated silica in dispersed form as a raw material for obtaining a dye by mixing said silica with an inorganic pigment, in particular with an inorganic pigment based on an iron compound. .
- a dye capable of being obtained by calcination, then optional grinding, of a mixture of precipitated silica in dispersed form and of an inorganic pigment, in particular of an inorganic pigment based on an iron compound. It also relates to the use of such a dye for coloring ceramic materials, and to the ceramic materials thus colored.
- Natural or synthetic pigments are used as colorants in the ceramic industry, in particular for the production of traditional colored tiles and tiles.
- the coloring is carried out by the addition of specific pigments to the ceramic paste before the shaping by pressing and sintering of the tiles / tiles obtained.
- Classic pigments for ceramics are natural products. So the
- Thiviers sandstone generally comprising approximately 90% of quartz and approximately 10% of goethite (FeOOH), makes it possible to obtain colors from red to brown which are the main colors developed traditionally for tiles and especially floor tiles, and in particular porcelain stoneware tiles (Porcellenato Stoneware) obtained using a “fast firing” process.
- a new concept of dye for ceramic materials has recently appeared: it consists in previously including the pigment in a mineral matrix, more particularly silica.
- the potential advantage of including the pigment in an inert vitreous or crystallized matrix is the great stability with respect to severe thermal and chemical conditions, such as those encountered in the ceramic industry, and has thus made it possible the development of new coloring powders.
- this dye acts as a chromatic unit from a pigmentation point of view and the color is not developed by introduction of an ion into the lattice of the matrix or by formation of a solid solution; the crystals responsible for coloring are in fact small crystals included during the cooking / sintering process of the matrix.
- This new concept is the synthesis of red / brown inorganic pigments for ceramic applications, by inclusion of hematite ( ⁇ -Fe 2 0 3 ) in a silica matrix.
- a dye made from microsilica (or silica fume) and iron oxide is described in WO 00/53680: the process uses intensive grinding in a humid environment, drying, high temperature calcination and grinding.
- the mixture between silica and iron oxide must be perfect. This implies for example that the silica powder is extremely well disaggregated by intensive grinding in order to obtain agglomerates having a size close to or less than that of the iron pigment, that is to say a few microns.
- the intensive contact of silica with the pigment is of great importance in the formation of color, in particular for obtaining a high level of red, a high gloss and a high intensity (red / brown after cooking). This is particularly the case in the presence of intensive grinding of the constituents.
- One of the aims of the present invention is to provide an alternative to the techniques known from the prior art, while dispensing with an intense grinding step and while making it possible, in particular, to achieve very good colorimetric performance. (in particular high stability), and avoiding the drawbacks mentioned above.
- the invention firstly relates to the use of precipitated silica (advantageously amorphous) in dispersed form (in water) as a raw material for obtaining a dye by mixing said silica with a inorganic pigment.
- Said inorganic pigment is preferably based on a metallic compound (for example a soluble metallic salt), and, even more preferably, based on an iron compound.
- This iron compound is generally chosen from Fe 2 0 3 , Fe 3 0 4 , FeOOH, a soluble iron salt or their mixtures. It can thus consist of iron oxide powder Fe 2 0 3 , Fe 3 0 4 or iron hydrate FeOOH. It is also possible to use one (or more) soluble iron salt (s), such as soluble iron nitrate (in the form of powder or solution), preferably soluble iron sulphate (in the form of powder or solution).
- precipitated silica is understood to mean any silica obtained by the precipitation reaction of a silicate, such as an alkali metal silicate (sodium silicate for example), with an acid (sulfuric acid for example); the precipitation mode of the silica can be arbitrary here: in particular, addition of acid on a silicate base stock, simultaneous total or partial addition of acid and silicate on a base stock of water or silicate solution .
- a silicate such as an alkali metal silicate (sodium silicate for example)
- acid sulfuric acid for example
- the precipitation mode of the silica can be arbitrary here: in particular, addition of acid on a silicate base stock, simultaneous total or partial addition of acid and silicate on a base stock of water or silicate solution .
- the precipitated silica in dispersed form which is used consists of:
- an aqueous suspension of precipitated silica said suspension preferably being obtained by disintegration (fluidification), then optionally grinding wet and / or stabilization with an additive, of a filter cake resulting from the precipitation reaction; it should be noted, even if this does not constitute the preferred variant of the invention, that said precipitated silica suspension used can be that obtained at the end of the precipitation reaction, before the filtration step.
- the silica is precipitated, the suspension obtained is filtered, a filtration cake is obtained which is washed if necessary, this cake can then be disintegrated.
- the precipitated silica preferably has a BET specific surface of at least 50 m 2 / g, in particular at least 90 m 2 / g, in particular between 100 and 400 m 2 / g, for example between 110 and 250 m 2 / g.
- the BET specific surface is determined according to the BRUNAUER - EMMET - TELLER method described in "The Journal of the American Chemical Society", Vol. 60, page 309, February 1938 and corresponding to standard NF T 45007 (November 1987).
- inorganic pigment In general, 2 to 30% is used, in particular 5 to 25%, for example 5 to 15%, by weight of inorganic pigment relative to the weight of silica (dry equivalent) + pigment.
- the precipitated silica in dispersed form advantageously consisting of a filtration cake resulting from the precipitation reaction, or a suspension of precipitated silica, preferably obtained by disintegration, then optionally stabilization of a filtration cake resulting from the precipitation reaction, can be very easily mixed with the inorganic pigment, preferably based on a metallic compound, without any grinding or controlled flocculation process.
- the metal compound is generally introduced in powder form, without prior dissolution.
- the consistency of the silica / pigment mixture can be adapted in particular by adding water in order to obtain a more fluid system, or by adding silica in powder form in order to obtain a drier paste.
- the silica / pigment mixture obtained is preferably subjected to calcination, optionally after prior drying (for example between 80 and 110 ° C).
- the calcination is generally carried out at a temperature between 400 and 1300 ° C, in particular between 600 and 1300 ° C, preferably between 800 and 1200 C.
- the calcination can thus be carried out at a temperature between 800 and 1000 ° C, or, even more preferably, at a higher temperature, in this case between 1000 and 1200 ° C., depending on the colorimetric parameters sought in the final ceramic material after firing.
- the duration of the calcination is preferably at least 30 minutes, in particular at least 45 minutes, for example between 45 and 80 minutes.
- the calcination is carried out at a temperature between 1000 and 1200 ° C, for at least 45 minutes, for example for 45 to 80 minutes.
- the calcination is most often followed by grinding (or crushing), in particular in order to obtain the desired particle size.
- a fine dye powder is thus obtained, for example having a BET specific surface of between 15 and 75 m 2 / g, in particular between 20 and 50 m 2 / g, in particular between 20 and 40 m 2 / g.
- the subject of the invention is also a dye (capable of being) obtained by calcination, then optional grinding, of a mixture of precipitated silica in dispersed form and of an inorganic pigment.
- a dye capable of being obtained by calcination, then optional grinding, of a mixture of precipitated silica in dispersed form and of an inorganic pigment.
- the dye according to the invention or resulting from the use of precipitated silica in dispersed form according to the invention is particularly suitable for the coloring of ceramic materials, for example in stoneware, in particular in porcelain stoneware (Porcellenato stoneware), by its very good color properties; it gives them, in particular in the case where the initial inorganic pigment used is based on an iron compound, in particular a high gloss and a high intensity (red / brown).
- the invention can also make it possible not to use auxiliary additives such as a silicone oil or a silane. In addition, it does not require the use of sol-gel type techniques such as controlled flocculation of silica.
- the dye, in powder form, can be mixed with the ceramic paste before shaping by pressing and (after possible drying) firing / sintering at high temperature (in particular between 1000 and 1300 ° C, for example between 1200 and 1250 ° C), in particular for 20 to 150 minutes, for example between 25 and 70 minutes or between 45 and 90 minutes, of total cycle (coloring in the mass).
- high temperature in particular between 1000 and 1300 ° C, for example between 1200 and 1250 ° C
- 20 to 150 minutes for example between 25 and 70 minutes or between 45 and 90 minutes, of total cycle (coloring in the mass).
- Ceramic materials for example formed from sandstone, in particular porcelain stoneware (Porcellenato stoneware), containing at least one dye as described above constitute one of the objects of the invention.
- Ceramic materials can in particular be tiles, tiles for example made of porcelain stoneware (Porcellenato stoneware), in particular red to brown in color when the initial inorganic pigment used is based on an iron compound.
- the dye according to the invention or resulting from the use of precipitated silica in dispersed form according to the invention is also suitable for the coloring of materials with a hydraulic or bituminous binder.
- These materials with a hydraulic or bituminous binder containing at least one such dye also constitute one of the objects of the invention.
- the Z145 silica filter cake (precipitated silica marketed by the Applicant), resulting from the precipitation reaction of this silica, is mixed with iron oxide type Goethite (iron hydroxide) FeOOH (sold by the company Johnson Matthey) in powder form: introduction of the powder during the mixing of the cake.
- the proportions are as follows: 10% by weight of Fe 2 0 3 and 90% by weight of silica (dry equivalent) (iron content at 6.6%). Mixing is carried out by kneading for 25 minutes at 100 rpm
- the product After calcination, the product is coarsely crushed so as to obtain a fine powder of dye: the grain size is fixed by sieving at 100 ⁇ m.
- the dye thus prepared is introduced into a ceramic paste type sandstone (Grès Porcellenato), in the following proportions: 4% by weight of dye and 96% by weight of ceramic paste.
- the composition obtained is moistened with 4% by weight of water, then shaped by pressing in order to obtain pellets.
- the pellets are then dried at 120 ° C (for 6 hours), then introduced into a sintering oven. Sintering is carried out in a dynamic oven at 1220 ° C - 10 minutes for a total cycle of 35 minutes.
- Applicant resulting from the precipitation reaction of this silica, is mixed with iron sulfate III (sold by the company Prolabo) in powder form: introduction of the powder during the kneading of the cake.
- the proportions are as follows: 10% by weight of Fe 2 0 3 and 90% by weight of silica (dry equivalent) (iron content at 6.6%).
- the mixing is carried out by kneading for 25 minutes at 100 rpm (internal kneader, Brabender type).
- the product obtained is then dried at 90 ° C for 6 hours, then calcined at 1020 ° C for 5 minutes. After calcination, the product is roughly crushed so as to obtain a fine powder of dye: the particle size is fixed by sieving at 100 ⁇ m.
- the dye thus prepared is introduced into a ceramic paste type sandstone (Grès Porcellenato), in the following proportions: 4% by weight of dye and 96% by weight of ceramic paste.
- the composition obtained is moistened with 4% by weight of water, then shaped by pressing in order to obtain pellets.
- the pellets are then dried at 120 ° C (for 6 hours), then introduced into a sintering oven. Sintering is carried out in a dynamic oven at 1220 ° C - 10 minutes for a total cycle of 35 minutes.
- Applicant resulting from the precipitation reaction of this silica, is mixed with iron sulfate III (sold by the company Prolabo) in powder form: introduction of the powder during the kneading of the cake.
- the proportions are as follows: 10% by weight of Fe 2 0 3 and 90% by weight of silica (dry equivalent)
- the mixing is carried out by kneading for 25 minutes at 100 rpm (internal kneader, Brabender type).
- the product obtained is then dried at 90 ° C for 6 hours, then calcined at 1020 ° C for 60 minutes.
- the product After calcination, the product is coarsely crushed so as to obtain a fine powder of dye: the particle size is fixed by sieving to
- the dye thus prepared is introduced into a ceramic paste of the sandstone type.
- the composition obtained is moistened with 4% by weight of water, then shaped by pressing in order to obtain pellets.
- the pellets are then dried at 120 ° C (for 6 hours), then introduced into a sintering oven. Sintering is carried out in a static oven at 1225 ° C - 10 minutes for a total cycle of 60 minutes.
- the Z145 silica filter cake (precipitated silica sold by the Applicant), resulting from the precipitation reaction of this silica, is mixed with iron III sulphate (sold by the company Prolabo) in powder form: introduction of the powder during mixing the cake.
- the proportions are as follows: 10% by weight of Fe 2 0 3 and 90% by weight of silica (dry equivalent) (iron content at 6.6%). Mixing is carried out by kneading for 25 minutes at 100 rpm
- the product After calcination, the product is roughly crushed so as to obtain a fine powder of dye: the particle size is fixed by sieving at 100 ⁇ m.
- the dye thus prepared is introduced into a ceramic paste type sandstone (Grès Porcellenato), in the following proportions: 4% by weight of dye and 96% by weight of ceramic paste.
- the composition obtained is moistened with 4% by weight of water, then shaped by pressing in order to obtain pellets.
- the pellets are then dried at 120 C C (for 6 hours), then introduced into an oven sintering. Sintering is carried out in a static oven at 1225 ° C - 10 minutes for a total cycle of 60 minutes.
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Organic Chemistry (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Dispersion Chemistry (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Inorganic Chemistry (AREA)
- Pigments, Carbon Blacks, Or Wood Stains (AREA)
Abstract
Description
Claims
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| EP03738167A EP1483338A1 (fr) | 2002-03-12 | 2003-03-12 | Utilisation de silice precipitee dispersee pour l obtention d un colorant par melange avec un pigment inorganique, color ant ainsi obtenu et application a la coloration de materiaux ceramiques |
| US10/507,234 US20050160943A1 (en) | 2002-03-12 | 2003-03-12 | Use of dispersed precipitated silica to obtain a dye by mixture with an inorganic pigment, rsulting dye and use for dyeing ceramic materials |
| AU2003244687A AU2003244687A1 (en) | 2002-03-12 | 2003-03-12 | Use of dispersed precipitated silica to obtain a dye by mixture with an inorganic pigment, resulting dye and use for dyeing ceramic materials |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR02/03477 | 2002-03-12 | ||
| FR0203477A FR2837206B1 (fr) | 2002-03-12 | 2002-03-12 | Utilisation de silice precipitee dispersee pour l'obtention d'un colorant par melange avec un pigment inorganique, colorant ainsi obtenu et application a la coloration de materiaux ceramiques |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2003085053A1 true WO2003085053A1 (fr) | 2003-10-16 |
Family
ID=27772247
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/FR2003/000795 Ceased WO2003085053A1 (fr) | 2002-03-12 | 2003-03-12 | Utilisation de silice precipitee dispersee pour l'obtention d'un colorant par melange avec un pigment inorganique, colorant ainsi obtenu et application a la coloration de materiaux ceramiques |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US20050160943A1 (fr) |
| EP (1) | EP1483338A1 (fr) |
| AU (1) | AU2003244687A1 (fr) |
| FR (1) | FR2837206B1 (fr) |
| WO (1) | WO2003085053A1 (fr) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2856696B1 (fr) * | 2003-06-30 | 2006-11-10 | Rhodia Chimie Sa | Utilisation de silico-aluminate precipite pour l'obtention d'un colorant par melange ou par impregnation avec un pigment inorganique, colorant ainsi obtenu et application a la coloration de materiaux ceramiques |
| US20080023889A1 (en) * | 2006-07-14 | 2008-01-31 | Cheshire Michael C | Brick additives comprising colorants and method |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4482390A (en) * | 1981-09-12 | 1984-11-13 | British Ceramic Research Association Limited | Method of protecting pigments with transparent crystalline zircon |
| EP0652490A2 (fr) * | 1993-10-08 | 1995-05-10 | Toda Kogyo Corp. | Particules magnétiques et procédé pour sa fabrication |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5186746A (en) * | 1990-08-15 | 1993-02-16 | J. M. Huber Corporation | High performance sams pigments of low oil, absorption, preparation, properties and end-use applications |
| US5512094A (en) * | 1992-11-20 | 1996-04-30 | E. I. Du Pont De Nemours And Company | Metal oxide coated silica shells |
| DE19639016A1 (de) * | 1996-09-23 | 1998-03-26 | Basf Ag | Mesoporöses Siliciumdioxid, Verfahren zu seiner Herstellung und seiner Verwendung |
| DE19804109A1 (de) | 1998-02-03 | 1999-08-12 | Cerdec Ag | Rotbraun ausbrennende Farbkörper, Verfahren zu deren Herstellung und deren Verwendung |
| WO2000053680A1 (fr) | 1999-03-10 | 2000-09-14 | Itaca, Innovaciones Tecnicas Aplicadas A Ceramicas Avanzadas, S.A. | Pigments a base de silice et d'oxyde de fer et leur procede de fabrication |
| DE10049803A1 (de) * | 2000-10-09 | 2002-04-18 | Bayer Ag | Kompositpartikel |
-
2002
- 2002-03-12 FR FR0203477A patent/FR2837206B1/fr not_active Expired - Fee Related
-
2003
- 2003-03-12 EP EP03738167A patent/EP1483338A1/fr not_active Withdrawn
- 2003-03-12 AU AU2003244687A patent/AU2003244687A1/en not_active Abandoned
- 2003-03-12 US US10/507,234 patent/US20050160943A1/en not_active Abandoned
- 2003-03-12 WO PCT/FR2003/000795 patent/WO2003085053A1/fr not_active Ceased
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4482390A (en) * | 1981-09-12 | 1984-11-13 | British Ceramic Research Association Limited | Method of protecting pigments with transparent crystalline zircon |
| EP0652490A2 (fr) * | 1993-10-08 | 1995-05-10 | Toda Kogyo Corp. | Particules magnétiques et procédé pour sa fabrication |
Also Published As
| Publication number | Publication date |
|---|---|
| FR2837206B1 (fr) | 2004-07-09 |
| US20050160943A1 (en) | 2005-07-28 |
| FR2837206A1 (fr) | 2003-09-19 |
| AU2003244687A1 (en) | 2003-10-20 |
| EP1483338A1 (fr) | 2004-12-08 |
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