FI20176090A1 - Pigment composition - Google Patents

Abstract

The invention relates to a pigment composition which comprises at least one precipitated porous pigment. The invention further relates to the use of such a pigment composition such as an opacity and brightness giving pigment. Furthermore, the invention relates to the use of a pigment composition according to the invention to replace titanium dioxide without weakening the optical properties.

Description

Field of the Invention

The present invention relates to a pigment composition comprising at least one precipitated porous pigment. The invention further relates to the use of such a pigment composition as an opacity and brightness pigment. The invention further relates to the use of the pigment composition according to the invention as a substitute for titanium dioxide without loss of optical properties. The invention also relates to a process for preparing a pigment composition of the invention.

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Technology background

Titanium dioxide (TiO ₂ ) is commonly used as a white pigment in paints, paper, cardboard, plastic, rubber, laminate and printing ink fillers and in various coatings. The most important properties obtained with titanium dioxide are opacity, opacity, brightness, tintability and L-value. TiO ₂ is the most effective and very expensive pigment with optical properties. Titanium dioxide is commercially available as anatase (refractive index 2.55) and rutile crystals (refractive index 2.7). Both rutile crystals of anatase are non-amorphous.

Because TiO ₂ is expensive and difficult to recycle, so-called extenders are typically added to titanium dioxide to replace part of the amount of titanium dioxide required. Extenders are pigments or fillers that are significantly cheaper than titanium dioxide, which can physically separate the titanium dioxide crystals and make the crystal distances more suitable for light scattering. However, the amount of extender must be kept low, since the high refractive index of TiO ₂ eventually gives the highest light scattering capacity and the larger amounts of extender reduce the light scattering ability. Typically, up to 25% by weight of titanium dioxide can be replaced in various applications without losing the optical properties obtained with titanium dioxide, in particular opacity. In addition, titanium dioxide manufacturers usually coat titanium dioxide with 120% by weight of the pigment with various organic and / or inorganic chemical precipitation or polymer products.

Partial replacement of titanium dioxide with calcium carbonate is disclosed in WO 2009/109705 (FP-Pigments Oy). WO 2015/007954 (FP-Pigments Oy), in turn, describes compositions comprising titanium dioxide and additives which can be substituted for a portion of the titanium dioxide in said composition. The first additive comprises a composite pigment consisting of a skin forming component and an optical pigment, and the second additive comprises a reactive polymer. The shell forming component is preferably an inorganic, water-insoluble compound, such as precipitated calcium carbonate, calcium sulfate, barium sulfate, magnesium carbonate, magnesium silicate, aluminum hydroxide or aluminum silicate.

Brief Description of the Invention

It is an object of the present invention to provide a pigment composition suitable for use in paper, cardboard, plastic, rubber and printing ink fillers, coating compositions for coating paper, cardboard, plastic, rubber, laminate, concrete and wood, and in paints. It is an object of the present invention to use a pigment composition as an opacity and brightness pigment. A further object of the present invention is to use the pigment composition of the invention as a substitute for titanium dioxide without diminishing the optical properties. It is also an object of the present invention to provide a process for preparing a pigment composition.

The object of the invention is achieved by a product, use and method which is characterized by what is stated in the independent claims. Preferred embodiments of the invention are described in the dependent claims.

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BRIEF DESCRIPTION OF THE DRAWINGS

Figure 1 shows SEM images of a sample according to the invention and a control sample as described in Example 6.

Detailed Description of the Invention

The invention relates to a pigment composition suitable for use in paper, cardboard, plastic, rubber and printing ink fillers, paper, cardboard, plastic, rubber, laminate, concrete and wood coatings and paints. The invention relates to the use of a pigment composition for providing opacity and / or brightness pig3

20176090 prh 05 -12- 2017 as ment. The present invention further relates to the use of the pigment composition of the invention as a substitute for titanium dioxide without loss of optical properties. With the pigment composition according to the invention, titanium dioxide can be partially or completely replaced without loss of optical properties. The invention also relates to a process for the preparation of a pigment composition according to the invention.

Optical efficiency, that is, the scattering of light in a material as light travels through the material, is influenced by the following in coated or uncoated materials:

- air-solid interfaces (refractive index of air about 1 and usually refractive index of 1.4 to 1.8, such as plastics, fibers, rubbers and most pigments and fillers),

- the distances between the pigments,

- voids inside the pigments,

- refractive indices of the substances,

- small average particle size of pigments - optimum half of the wavelength of light (visible light settles in the 400-780 nm range).

Critical Pigment Volume Concentration (CPVC), especially in coatings, is an important measure of the proportion of binder and pigments in a coating where the pigments are completely coated with si20 and the pores of the pigments are filled with binders. At values lower than this CPVC, the proportion of binder is greater than the amount of pigment in the coating and vice versa when the value is greater than CPVC. Paper coatings and primers usually contain significantly more pigment than binder. In glossy paint, on the other hand, the amount of binder is significantly higher than that of the pigment.

Surprisingly, it was found that the pigment composition of the invention can partially replace titanium dioxide (about 1% by weight, 1-5% by weight, 5-15% by weight, 10-25% by weight, at least 25% by weight, 25-50% by weight , 50-75% by weight) or as a pigment (100% by weight) which gives optical properties (opacity and brightness) without loss of optical properties.

Surprisingly, it has been found that pigments and fillers that are more favorable to titanium dioxide can be replaced by a higher cost / scattering pigment composition according to the invention, which offers the possibility of altering material ratios to achieve overall savings.

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Thus, the raw material cost of the coated and uncoated materials can be reduced due to the excellent scattering ability and low cost of the pigment composition according to the invention, i.e. the materials can be thinned without loss of optical properties.

The invention works best when the average particle size of the pigment composition is about half the wavelength of light. It is advantageous for the invention that the pigment pores are filled with air after drying.

pigment composition comprising at least one precipitated, the porous pigment is selected from aluminum silicate, calcium, according to the invention MAG10 silicate, aluminum magnesium silicate, alumiinikalsiumsilikaateista, alumiinikalsiummagnesiumsilikaateista, zinc, alumiinisinkkisilikaateista, kalsiumsinkkisilikaateista, calcium magnesium silicate, alumiinikalsiumsinkkisilikaateista, alumiinikalsiummagnesiumsinkkisilikaateista, alumiinimagnesiumsinkkisilikaateista, any other aluminum, magnesium, kalsium15 and / or zinc silicate combination / alloy, silica or any combination thereof. According to one embodiment of the invention the pigment is comprised of at least one deposited on a porous pigment selected from aluminum silicate, calcium silicate, magnesium silicate, aluminum magnesium silicate, alumiinikalsiumsilikaateista, alumiinikalsiummagnesiumsilikaa20 roads, zinc, alumiinisinkkisilikaateista, kalsiumsinkkisilikaateista, calcium magnesium silicate, alumiinikalsiumsinkkisilikaateista, alumiinikalsiummagnesiumsinkkisilikaateista, alumiinimagnesiumsinkkisilikaateista, any other aluminum, magnesium , a combination / mixture of calcium and / or zinc silicate, silica or any mixture thereof, optionally Na, K, L,

SO4, SO3, PO4, BO3, B, PO3, NO2, NO3, F, carbonic acid, carboxylic acid, zinc, manganese, iron, zirconium, nickel, cobalt , residues of chromium, barium, sulfur, strontium, carbon, Cl and / or other elements, and optionally stabilizers, dispersants, surface modifiers and / or other conventional excipients. According to one embodiment of the invention, the pigment composition comprises at least one precipitated porous pigment selected from aluminum silicates, calcium silicates, magnesium silicates, aluminum magnesium silicates, aluminum calcium silicates, aluminum calcium magnesium silicates, silicon oxides thereof or any of these. According to one embodiment of the invention, the pigment composition comprises at least one precipitated, porous pigment 35 selected from aluminum silicates, magnesium silicates and / or aluminum magnesium silicates. According to one embodiment of the invention, the pigment composition

20176090 prh 05 -12-2017 comprises at least one precipitated porous pigment selected from calcium silicates, aluminum silicates and / or aluminum calcium silicates. According to one embodiment of the invention, the pigment composition comprises at least one precipitated porous pigment selected from aluminum silicates, calcium silicates, magnesium silicates, aluminum magnesium silicates, aluminum calcium silicates, aluminum calcium magnesium silicates, or silicon oxides thereof. According to one embodiment of the invention, the pigment composition comprises at least one precipitated porous pigment selected from aluminum silicates, magnesium silicates and / or aluminum magnesium silicates. According to one embodiment of the invention, the pigment composition comprises at least one precipitated porous pigment selected from calcium silicates, aluminum silicates and / or aluminum calcium silicates.

In addition, the precipitated porous pigments of the invention may contain Na, K, L, SO4, SO3, PO4, BO3, B, PO3, NO2, NO3, F, carbonic, carboxylic acid. , residues of zinc, manganese, iron, zirconium, nickel, cobalt, chromium, barium, sulfur, strontium, carbon, Cl and / or other elements.

The precipitated porous pigments of the invention are substantially free of titanium dioxide. According to one embodiment, the precipitated porous pigments of the invention do not contain titanium dioxide, i.e., the precipitated porous pigments of the invention are TiO2-free.

The pigment composition of the invention may also contain excipients such as stabilizers, dispersants and / or surface modifiers.

The pigment composition of the invention has an average particle size of less than 100 µm as determined by laser measurement. According to one embodiment of the invention, the pigment composition has an average particle size of 1-10 µm as determined by laser measurement. According to one embodiment of the invention, the pigment composition has an average particle size of 1-2 µm as determined by laser measurement. According to one embodiment of the invention, the pigment composition has an average particle size of 0.2 to 0.6 µm as determined by laser measurement. According to one embodiment of the invention, the particle size and / or particle size distribution of the pigment composition is determined by a laser diffraction method. According to one embodiment of the invention, the particle size and / or particle size distribution of the pigment composition is determined by a laser diffraction method using a device capable of determining particle size in the range of 0.02 to 2000 µm. According to one embodiment of the invention, the particle size and / or particle size distribution of the pigment composition

20176090 prh 05 -12-2017 is configured on a Malvern 2000 device. The pigment composition of the invention typically has a pore volume in the range of 0.20 to 0.30 cm ³ / g.

According to one embodiment of the invention, the air pores of the precipitated pigments are kept empty after drying to obtain a difference in the refractive index (about 1) and the pigment (refractive index 1.4-1.8) between the pores as light scattering, which shows better opacity and brightness.

The pigment composition according to the invention is suitable for use as a pigment filler for paper, cardboard, plastic, rubber and printing inks. Such filler compositions include, in addition to pigment, conventional excipient compositions and excipients. Further, the pigment composition of the invention is suitable for use as a pigment in coating compositions used as coatings for papers, cardboard, plastics, rubbers, laminates, concrete and wood. Such coating compositions include, in addition to pigment, conventional coating composition formulations and excipients. The pigment 15 composition of the invention is also suitable for use as a pigment as a filler in any material requiring high light scattering. Further, the pigment composition of the invention is suitable for use as a pigment in paints. Such paints contain, in addition to pigment, conventional paints and auxiliaries. Titanium dioxide, other pigments, binders, theological regulators, adhesives, or other necessary auxiliaries and / or additives may be used with the pigment compositions of the invention, depending on the application.

According to one embodiment of the invention, the pigment composition is suitable for use as an opacifying and / or brightening pigment. According to one embodiment of the invention, the pigment composition is suitable for use as a replacement for titanium dioxide without loss of optical properties. The pigment composition of the invention is suitable for use as a replacement for titanium dioxide in fillers for paper, board, plastic, rubber, laminate and printing inks. Further, the pigment composition of the invention is suitable for use as a replacement for titanium dioxide in coating compositions used as coatings for papers, board, plastics, rubbers, concrete and wood, and as a pigment in paints. The pigment composition according to the invention can be substituted for about 1 to 100% by weight of titanium dioxide without any deterioration in optical properties. According to one embodiment of the invention, the pigment composition can replace 5,100% by weight, 10-100% by weight, 15-100% by weight of titanium dioxide, without any deterioration in the optical properties. An embodiment of the invention

According to 20176090 prh 05 -12-2017, the pigment composition can replace 25-100% by weight of titanium dioxide without any deterioration in optical properties. According to one embodiment of the invention, the pigment composition can be substituted for 50 to 100% by weight of titanium dioxide without any deterioration in optical properties. According to one embodiment of the invention, the pigment composition can replace 75-100% by weight of titanium dioxide without any deterioration in the optical properties. According to one embodiment of the invention, the pigment composition can replace about 25% by weight, about 50% by weight, about 75% by weight, about 100% by weight of titanium dioxide, without attenuation in the optical properties. According to one embodiment of the invention, the pigment composition can replace 100% by weight of titanium dioxide without loss of optical properties.

Because the pigment composition of the invention can completely or partially replace titanium dioxide, it achieves a significant reduction in the cost of the raw material. The pigment composition according to the invention more preferably achieves a similar scattering capability than when titanium dioxide is used. When using the pigment composition according to the invention, the materials to be manufactured can be thinned and / or lightened without the degradation (brightness and opacity) being achieved compared to the use of titanium dioxide. Thus, it is possible to calculate the basis weight of paper or board, reduce the number of coatings, remove coatings from multiple coatings as unnecessary, or reduce the coatings, paint or laminate used and opacity and / or opacity. Each of these actions results in lower material costs, improved productivity and environmental savings.

The invention also relates to a process for the preparation of the pigment composition described, comprising the following steps:

(a) optionally bringing at least one magnesium-containing compound and / or calcium-containing compound and / or zinc-containing compound in solution form, or optionally bringing at least one magnesium-containing compound and / or calcium-containing compound and / or zinc-containing compound into solution,

b) optionally adding at least one aluminum-containing compound, an acid such as sulfuric acid or carbon dioxide, a base or any mixture thereof;

(c) adding at least one compound containing silicon;

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(d) mixing at a peripheral speed of at least 1 m / s;

e) filtering the resulting composition;

f) optionally dispersing the filter cake;

g) optionally milling the dispersion;

h) optionally drying the dispersion.

In the process according to the invention, process steps a), b), c) and d) can be carried out in any order. The choice of the order of execution of the process steps is within the skill of the art and will depend, the compounds used and the reaction conditions. The compounds used in the process of the invention may be added simultaneously or at different times. Several compounds can be used in the process of the invention. Typically, the reactions of the process occur in solution. The at least one magnesium-containing compound may be any compound suitable for the process, such as magnesium hydroxide, carbonate, sulfate and / or chloride. The at least one calcium-containing compound may be any compound suitable for the process, such as calcium hydroxide, carbonate, sulfate and / or chloride. The at least one zinc-containing compound can be any compound suitable for the process, such as zinc sulfate, zinc chloride, zinc chloride, zinc nitrate and / or zinc oxide. The at least one aluminum-containing compound may be any compound suitable for the process, such as aluminum sulfate, polyaluminium chloride and / or sodium aluminate. The at least one silicon containing compound may be any compound suitable for the process, such as Na, K and / or L silicate.

The pigment composition of the invention may be prepared by an industrially usable process employing, at least once in at least one of the process steps, a mixture having a peripheral velocity of at least 1 m / s. In a method according to an embodiment of the invention, the peripheral velocity is 1500 m / s. In a method according to an embodiment of the invention, the peripheral velocity is 1 to 250 m / s. The mixing is preferably carried out by mixers using rotor-rotor and / or rotor-stator techniques. The mixing can utilize an is30 mixer, rotating in the opposite direction, rotating in the same direction with a large difference in speed, dripping, pin milling, shocks and repulsors. In the rotors and stator, the mixing elements are pins, blades, plates, which may have different shaped holes, grooves, or the like. The velocity difference between rotor circuits running in different directions or in the same direction, or adjacent rotors and stator circuits, is typically between 5 and 400 m / s, preferably between 5200 m / s. Disintegration and spraying are also utilized in the preparation of the pigment composition.

The following examples illustrate the practice of the invention but do not limit the invention to the embodiments described.

Example 1

Preparation of the pigment sample was started by adding magnesium hydroxide solution and aluminum sulfate solution to the reactor medium. Temperatures above the freezing point of water and uniform stirring were used. To this solution was added dilute aluminum sulfate and sodium silicate while maintaining the target pH.

Sodium silicate was used in at least the amount required for the stoichiometric reaction of magnesium and aluminum. A rotor-rotor blend operating at a peripheral speed of at least 1 m / s was used at some point during production. Finally, the pigment sample was filtered and washed with water before dispersing the filter cake into an aqueous slurry. The pigment sample thus obtained is called OPA1.

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Example 2

Preparation of the pigment sample was started by adding the calcium hydroxide solution to the reactor medium. A temperature above the freezing point of water and uniform stirring were used in the preparation. To this solution was added dilute aluminum sulfate and sodium silicate while maintaining the target pH. Sodium silicate was used in at least the amount required for the stoichiometric reaction of calcium and aluminum. A rotor-rotor blend operating at a peripheral speed of at least 1 m / s was used at some point during production. Finally, the pigment sample 25 was filtered and washed with water before dispersing the filter cake into an aqueous slurry. This pigment sample had an average particle size of 0.42 µm (Malvern 2000, version 5.60).

Example 3

Preparation of the pigment sample was started by adding the zinc sulfate solution to the reactor medium. Temperatures above the freezing point of water and uniform stirring were used. To this solution was added diluted aluminum sulfate 5 and sodium silicate while maintaining the target pH. Sodium silicate was used at least in the amount required for the stoichiometric reaction of zinc and aluminum. At any point during production, a rotor-rotor mixture operating at a peripheral speed of at least 1 m / s was used. Finally, the pigment sample was filtered and washed with water before dispersing the filter cake into an aqueous slurry. This pigment10 sample had an average particle size of 1.91 µm (Malvern 2000, version 5.60)

Example 4

A paint paste was prepared from the pigment dispersion prepared in Example 1. The paste contained 5% dry pigment and 5% latex (Acronal S728, BASF) based on the dry pigment content. The pH of this aqueous slurry was maintained by addition of lye above pH 8.3 by adding a thickener (Sterocoll FS, BASF) until the dispersion had a viscosity of 800-850 cp (Brookfield, 100 rpm, spindle 4).

An opacity meter (Rhopoint Novoshade Duo +) was used to determine the opacity and shade of both the 2.5 g / m ² and 5 g / m ² coatings. The coating was applied with standard rods (K Bar) no. (RK101 Control Coater). For 4 and 7 plastic films (Leneta 1 mm, clear polyester sheets). The pigments used were OPA1, TiO2A (SR5, Venator) and TiO2B (Ti-pure R102, Dupont). The results are shown in Table 1.

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Table 1.

Pigment Opacity,% Tone,% Amount of coating, g / m2 OPA1 75.5 63.3 5 ΤΪΟ2Α 72.5 60.5 5 ΤΪΟ2Β 70.5 58.7 5 OPA1 67.7 56.4 2.5 ΤΪΟ2Α 66.5 55.3 2.5 ΤΪΟ2Β 63.7 53.5 2.5

Example 5

OPA1 and TiO2A (SR5, Venator) pigments were also tested on uncoated fine paper. The pulp was bleached pine and bleached eucalyptus (40:60) ground to SR30. To the thick pulp, 0.5% of the average cationic starch and 0.2% of the dry adhesive (AKD) based on dry fiber were added. The experiments were performed in a dynamic sheet mold with a basis weight and ash target of 30 g / m2 and 10%. Of these, the target was set in the sheet mold by varying the amount of stock and by changing the amount of retention agent (PAM). The prepared papers were machine calendered and dried in a tumble dryer prior to conditioning and testing. The results are shown in Table 2.

Table 2.

experimental point OPA1 TiO2 Ash,% 9.1 9.9 Gross weight, g / m2 29.8 30.3 Pulp starch,% 0.5 0.5 Mass adhesive,% 0.2 0.2 Brightness,% 88.7 87.5 Opacity,% 78.9 77.5

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Example 6

In this example, an attempt was made to lower the standard uncoated copy paper weight from 80 g / m ² to 50 g / m ² without degrading the optical properties. In the 80 g / m ² comparative test, aragonite PCC (PCC-A) has been used as a pigment when comparing this to the action of OPA1 on 50 g / m ² paper. The pulp was bleached pine and bleached eucalyptus (40:60) ground to SR30. To the thick pulp, 0.5% of the average cationic pulp starch and 0.2% pulp glue (AKD) based on dry fiber were added. The experiments were performed in a dynamic sheet mold. The prepared papers were machine calendered and dried in a tumble dryer prior to conditioning and testing. The results are shown in Table 3.

Table 3.

Pigment A PCC OPA1 Gross weight, g / m2 79.7 50.3 Ash,% 19.6 19.1 Brightness (ISO),% 90.5 93.3 Opacity,% 87.5 88 Brightness (CIE),% 82.0 88.0

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Example 7

This example is OPA1 prepared according to Example 1. In addition, a control sample was prepared according to Example 1, in which no rotor-rotor mixer was used. Figure 1 shows SEM images of both samples. OPA1 had an average particle size of 0.7 µm and a control sample had an average particle size of 8.7 µm, respectively. In the plastic film coating of Example 3, OPA1 gave a opacity of 73.3% and a control specimen gave a guideline of 57.8%. From the figure it can be concluded that the product according to the invention has a smaller primary particle size (OPA1) than the control sample.

Example 8

The pore sizes and pore sizes of OPA1, TiO2A and TiO2C pigment samples were determined based on measuring isothermal adsorption desorption points at liquid nitrogen temperature and calculating the adsorption desorption isotherms obtained therefrom. Pigment samples were analyzed by N2 sorption at -196 ° C (TriStar 3000, Micromeritics). The porosity of the pigments was estimated from the N 2 levels at a relative pressure p / p = 0.97. Barrett-Joyner-Halenda (BJH) 20 theories were used for this.

The pore size volumes of OPA1, TiO2A and TiO2C (Kronos 2971) pigments in the pigment samples are shown in Table 4. In the sample, TiO2A had 6.5% of inorganic surface treatment. The sample TiO2C has no surface treatment.

Table 4.

Sample Pore volume cm ³ / g TiO2A 0,050 TiO2C 0.017 OPA1 0.294

Only OPA1 had a significant pore size volume. The pore sizes of the TiO2A and TiO2C samples were so low that they could be due to particle agglomeration.

Claims (14)

1. The pigment composition comprising one or more of the precipitated porous pigment is selected from aluminum silicate, calcium silicate, magnesium silicate, aluminum magnesium silicate, alumiinikalsiumsilikaateista, alumiinikal5 siummagnesiumsilikaateista, zinc, alumiinisinkkisilikaateista, kalsiumsinkkisilikaateista, calcium magnesium silicate, alumiinikalsiumsinkkisilikaateista, alumiinikalsiummagnesiumsinkkisilikaateista, alumiinimagnesiumsinkkisilikaateista from any of aluminum, magnesium , a combination of calcium and / or zinc silicate, silica or any mixture thereof. 10 A pigment composition according to claim 1 comprising one or more precipitated porous pigments selected from aluminum silicates, magnesium silicates and / or aluminum magnesium silicates. A pigment composition according to claim 1 comprising one or more precipitated porous pigments selected from aluminum silicates, calcium 15 silicates and / or aluminum calcium silicates. A pigment composition according to any one of claims 1 to 3, comprising Na, K, L, SO4, SO3, PO4, BO3, B, PO3, NO2, NO3, F, carbonic acid -, carboxylic acid, zinc, manganese, iron, zirconium, nickel, cobalt, chromium, barium, sulfur, strontium, carbon and / or Cl residues. A pigment composition according to any one of claims 1 to 4 having an average particle size of less than 100 µm, preferably from 1 to 10 µm, more preferably from 1 to 2 µm, most preferably from 0.2 to 0.6 µm, as determined by laser measurement. 5 as a filler in laminate or printing ink, in a coating composition used as a coating on paper, board, plastic, rubber, concrete or wood, or in paint. The pigment composition of any one of claims 1 to 5, wherein the internal pores of the composition contain air. 25 Use of a pigment composition according to any one of claims 1 to 6 as a pigment filler for paper, cardboard, plastic, rubber, laminate or printing ink, or as a filler for any other material requiring high light scattering. A pigment composition according to any one of claims 1 to 6 30 as a pigment in a coating composition used as a coating on paper, board, plastic, rubber, concrete or wood, or as a raw material for any other material requiring high light scattering. 20176090 prh 05 -12- 2017 Use of a pigment composition according to any one of claims 1 to 6 as a pigment in a paint. 10 of titanium dioxide. Use of a pigment composition according to any one of claims 1 to 6 as a pigment replacement for titanium dioxide in paper, board, plastic, rubber, The use according to claim 10, wherein the pigment composition replaces 25-100% by weight, 50-100% by weight, 75-100% by weight, about 100% by weight Use of a pigment composition according to any one of claims 1 to 6 for reducing the basis weight of paper and / or cardboard or thinning the coating layers or paint or laminate without impairing the optical properties of the material. 15 A process for the preparation of a pigment composition according to any one of claims 1 to 6, comprising: (a) optionally introducing at least one magnesium-containing compound and / or calcium-containing compound and / or zinc-containing compound in solution form, or optionally introducing at least one magnesium-containing compound, and / or 20 calcium-containing compound and / or zinc-containing compound in solution form, b) optionally adding at least one aluminum-containing compound, an acid such as sulfuric acid or carbon dioxide, a base or any mixture thereof; c) adding a silicon containing compound; D) mixing at least once in at least one process step at a peripheral speed of at least 1 m / s, preferably 1 to 500 m / s, more preferably 1 to 250 m / s. e) filtering the resulting composition; f) optionally dispersing the filter cake; 30 g) optionally grinding the dispersion, h) optionally drying the dispersion. The method of claim 13, wherein the mixing is by rotor-rotor mixing and / or rotor-stator mixing.