• 专利附录
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    • 专利摘要:
    The invention relates to a hydrophobized natural zeolite for use in silicate binder systems based on water glass, silica sol, a combination of water glass and silica sol or silicic acid esters, characterized in that the hydrophobized zeolite is a hydrophobized by silanization natural zeolite, and wherein the hydrophobization of the zeolite as far as done after the mixing of the hydrophobized zeolite with water glass, silica sol, a combination of water glass and silica sol or silicic acid on the one hand retain its absorption capabilities for odors, gaseous pollutants and water vapor, but on the other hand its absorption of liquid water is suppressed and the processability and stability the silicate binder systems are not adversely affected by the addition of the hydrophobized zeolite.
    公开号:AT510635A1
    申请号:T17302010
    申请日:2010-10-18
    公开日:2012-05-15
    发明作者:Andreas Roemer
    申请人:Paltentaler Minerals Gmbh & Co Kg；
    IPC主号:
    专利说明:

    Hydrophobized zeolite for use in silicate binder systems
    The invention relates to a hydrophobized natural zeolite for use in silicate binder systems.
    Building materials based on water glass, a combination of water glass and silica sol, silica sol or silica esters are considered to be weather-resistant and long-lasting. These silicate building materials include, for example, silicate paints and silicate plasters, but also primers, adhesives, reinforcing materials, grouting compounds or concrete repair compositions (mortar or similar). They are used in the exterior and interior of buildings application. Potassium silicate glass is usually used in building materials based on water glass in a usually 5- to 32% (w / w) aqueous solution. Occasionally, however, soda water glass or lithium water glass is used. In silicate paints, the proportion of this aqueous waterglass solution is usually between 5 and 25% (w / w); for example, 5 to 20% of the aqueous waterglass solution (w / w) is usually used in silicate plaster. In building materials based on silica sol or silicic acid esters, silica sols or silicic acid esters are usually used in a 20- to 50% (w / w) aqueous solution, measured by their content of SiO 2. In many cases, combinations of water glass and silica sol are also used in building materials in order to combine the properties of both substances with one another,
    The function of water glass, silica sol or silicic acid ester in construction chemical mixtures is that the potassium silicate K 2 SiO 3 or sodium silicate Na 2 SiO 3 or lithium silicate Li 2 SiO 10 or colloidal amorphous silicon dioxide SiO 2 or silicic acid ester contained in the water glass or silica sol with the pigments of the paints or some constituents of
    2.18
    Plasters or other chemical preparations or the carbon dioxide in the air chemical reactions that leads to the irreversible formation of insoluble cross-linked silicas and silicates that act as a binder and are not washed out. Those components of the pigments or plasters which undergo these chemical reactions can be carbonates, or 2- or 3-valent cations. Carbonates of the alkaline elements lithium, potassium or sodium can therefore form, which are washed out by the weather. Water glass, silica sol or silicic acid esters therefore function as silicate binders in building materials. They are also referred to herein as reactive silicates. Building chemical preparations containing these substances are therefore referred to as silicate binder systems.
    Zeolites form a large family of crystalline aluminosilicates, some of which are synthesized, such as phillipsite, chabazite, mordenite, erionite, heulandite, clinoptilolite or natrolite in nature, others such as Linde type A zeolite or zeolite ZSM5. An extensive presentation of the properties of zeolites can be found in Barrer R.M .: Zeolites and Clay Minerals as Sorbents and Molecular Sieves, Academic Press London, 1978.
    Clinoptilolite is a natural mineral from the crystal group of zeolites with sorptive and ion-exchange properties, as described in "Reviews in Mineralogy & Geochemistry Volume 45, 2001 " is sufficiently described. Clinoptilolite can absorb up to 30% of its weight in water, whereby not only liquid water but also water vapor can be bound. Much of this water can be bound in hydrated form to the crystal structure. Another special feature of the mineral lies in its ability to absorb gaseous odor-active substances such as ammonia, butyric acid, dimethyl sulfide, dimethyl disulfide, cresol, indole and skatole. Also pollutants such as
    Formaldehyde, nitric oxide, nitrogen dioxide and sulfur dioxide are absorbed by clinoptilolite. Other natural and synthetic zeolites such as phillipsite, erionite, chabazite, mordenite, natrolite or Linde type A zeolite have similar chemical properties and are to a similar extent suitable for receiving water or gaseous substances.
    Clinoptilolite and, occasionally, other natural zeolites such as phillipsite, erionite, chabazite, mordenite or natrolite are frequently used as odor absorbers, as absorbers for gaseous pollutants and as moisture-regulating aids. Since odors, gaseous pollutants and moisture have a major impact on the atmospheric climate of a room, the presence of clinoptilolite and other zeolites in the room can have a regulating effect on the indoor climate. The room does not necessarily have to be a closed room. The regulation of atmospheric humidity and gaseous odors and pollutants are referred to here as climate regulation. These are typical properties of clinoptilolite and other natural zeolites in their natural forms. The natural form of clinoptilolite and other natural zeolites is obtained by degrading the mineral in deposits, crushing them and optionally drying them.
    Since clinoptilolite and other natural zeolites are never fully recovered as natural minerals, but always in association with accompanying minerals such as feldspar, smectite, montmorillonite or Christobalite or other minerals occurrences, rocks with a share of more than 50% natural zeolite for simplicity called natural zeolite. Since clinoptilolite is very often associated with the chemically similar mineral heulandite, rocks with a proportion of more than 50% of the sum of clinoptilolite and Heulandt in the literature as well as here also for the sake of simplicity as a natural clinoptilolite designated.
    Due to the ability of zeolites to absorb liquid water, water vapor and gaseous odors and other gaseous pollutants from the environment, zeolites are already used in certain building materials. The application "EP 1 808 420 building material for use in the interior of buildings " describes the use of the zeolites Natrolithe, Mesolithe and Skolezite as constituents of plasters which contain gaseous pollutants such as volatile organic hydrocarbons, formaldehyde or nitrogen oxides in the interior of buildings. The application also describes the use of hydrophobing agents as auxiliaries, but does not mention their purpose. Similarly, silicatic additives such as quartz grains are mentioned, but their effect and composition can not be compared with waterglass or silica sol or silicic acid esters because their surfaces are not or not sufficiently hydroxylated.
    However, there is still no known application in which natural zeolites are used in building materials based on water glass, silica sol, a combination of water glass and silica sol or silicic acid esters, as in the above-enumerated silicate building materials. This is because natural zeolites chemically react rapidly with aqueous solutions of water glass, silica sol or silicic acid esters because of their siliceous constituents and their proportion of divalent and trivalent ions such as calcium, magnesium, aluminum, iron, and strontium lose their processability. But also the zeolite component loses its special sorptive properties partly or wholly. The loss of the processing ability of the building material can be reduced by Μ 4 * 1 »• • • # • * •»
    t 5/18
    Clumping of the mixture or its solidification to a solid mass show.
    In particular, when the zeolite used as zeolite is one of the natural zeolites clinoptilolite, mordenite, chabazite, phillipsite, natrolite or erionite, the combination with reactive silicates, ie with water glass, silica sol, a combination of waterglass and silica sol or silicic acid ester leads to rapid curing of the mixture. so that it can not be further processed or stored because the said zeolites contain divalent cations in exchangeable form, which react rapidly with water glass in aqueous solution, and because these minerals often contain up to 10% <w / w) carbonates.
    Indeed, one can easily observe how a solution containing reactive silicates rapidly clogs and cures within a few hours as the powder of natural zeolite is stirred. The preparation of a salable preparation in containers containing these ingredients can not be stored or transported prior to further processing.
    If water-repellent agents such as soaps, waxes, paraffins or stearates are added to a chemical preparation which contains not only natural zeolites but also waterglass, silica sol, a combination of waterglass and silica sol or silicic acid ester, then the chemical reaction of the zeolite with the silicate constituents of the preparation not suppressed, but merely suppresses the absorption of liquid water in the preparation. Also, silanes are occasionally used as water repellents, wherein they are subsequently applied in liquid solution to the surface of the already processed building material and penetrate into the surface pores. At this time, they can no longer exert any influence on the processing ability of the building material. The addition of these water repellents therefore does not provide a suitable method for the preservation of the • · ·· 4 mm 67 * 18 ··· ·· * · · · ·
    Processing ability of the zeolite-containing silicate building materials and to preserve the sorptive function of the zeolite in the building material.
    The combination of the sorptive properties of natural zeolites and the properties of the chemical resistance of silicate building materials indoors and outdoors on the walls, ceilings and floors of buildings would have the advantage that the structures equipped with them resistant to the action of liquid water and chemically aggressive Substances such as acids would be, as they are conventional silicate building materials, and that they are at the same time a high
    Sorption capacity to water vapor, ammonia,
    Odors and other gaseous pollutants would have like conventional zeolite-containing building materials and thus could regulate the atmospheric climate.
    The object of the invention is therefore to bring natural zeolite into such a form that, in contact with a reactive silicate such as waterglass, silica sol of a combination of waterglass and silica sol or silicic acid ester, it does not impair the processability and typical application properties of the silicate building material preparation, as well the sorption properties of the zeolite are maintained for climate regulation.
    The object is achieved in that a hydrophobized natural zeolite for use in silicate binder systems based on water glass, silica sol, a combination of water glass and silica sol or silicic acid ester is selected, wherein the hydrophobized zeolite is a hydrophobized by silanization naturlihcer zeolite, and wherein the Hydrophobing of the zeolite is carried out so far that after mixing of the hydrophobized
    • * I
    Zeolite with water glass, silica sol or silicic acid on the one hand to retain its absorption capabilities for odors, gaseous pollutants and water vapor, but on the other hand its absorption of liquid water is inhibited and the processability and stability of the silicate binder system is not affected by the addition of the hydrophobized zeolite.
    In this case, the hydrophobized by silanization natural zeolite, for example, by simply spraying zeolite powder with a commercial organic silane preparation for construction chemical purposes while simultaneously circulating the sprayed powder for the purpose of mixing generated. The circulation must be such that the spray liquid wets as large a portion of the powder and thereby causes a silanization of the powdery zeolite surface. Instead of the powdered zeolite, it is also possible to use granular zeolite.
    It is advantageous if siloxane emulsifiers are added to the silane, since in this case the hydrophobization takes place uniformly and, depending on the amount of silane applied, an exact degree of hydrophobization of the zeolite can be set. Siloxanes also have the ability to hydrophobize and thus also promote the hydrophobization of zeolite. Other substances, such as are often included in commercially available silane preparations, do not affect their use according to the invention. For example, some silane preparations are diluted with water or other solvents before use. The amount of silane used should be between 0.5 to 8% (w / w) of the amount of zeolite to be treated. Preferably, a silane amount between 3.5 to 4% (w / w) of the zeolite to choose.
    When the silane contacts the zeolite surface, silanization occurs within a few minutes. The amount of silane applied and the circulation time of the powder should be 18x so that at least 0.8% (w / w) of the zeolite is silanized. During silanization, small amounts of volatile alcohols are formed, which escape in the course of the mixing process in gaseous form. Suitable organic silanes are preferably those silanes which are already used in construction chemistry as water repellents, such as highly alkylated silanes. But other silanes can be used according to the invention. Examples of highly alkylated silanes are, for example, isobutyltriethoxysilane or octyltriethoxysilanes, such as triethoxy (2,4,4-trimethylpentyl) silane.
    The production of powdery or granular natural zeolite is usually carried out by crushing coarsely crushed natural zeolite. For the application according to the invention, particle sizes of the zeolite particles in the range from 0 to 10 mm (millimeters) are suitable. The type of comminution tools used has no influence on the use of the zeolite according to the invention. The hydrophobized natural zeolite according to the invention can be used in all thin-layered silicate systems, which also include structuring coatings, such as plasters, paints, grouts, restoratives. Over the entire grain size range of 0 to 10 mm, however, the processability of the invention hydrophobicized natural zeolite as well as the maintenance of its natural sorptive properties are given.
    It is important that only zeolite powders or granules are used, which is at least 0.5% (w / w) silanized. In this case, the preparation remains miscible during storage in a closed container and can be processed further. The further processing of the silicate building material preparation can either mean the application on surfaces as a coating, or else the filling "t" «
    I s * / * ia of spaces such as joints, cavities, cracks, cracks and the like. If a zeolite with a silanization degree of less than 0.5% is introduced into silicate building material systems, it cures within a few minutes to such an extent that it is no longer capable of mixing. The further intended processing of BaustoffZubereitung is prevented. Surprisingly, it was found that with a degree of silanization of the zeolite of more than 8% (w / w), the processing properties of the building material and its storage stability no longer change significantly. However, then reduce the sorptive properties of the 3austoffes, which can be attributed to the zeolite.
    It is an essential part of the invention to add the silane not water-based zeolite-based building material, but first to silanize the zeolite, and only then the thus prepared zeolite the silicate building material system containing either water glass or silica sol or a combination of water glass and silica sol or silicic acid ester or mixtures thereof. Otherwise, it was observed, already reacts the zeolite with the other components of the building material to a compact mass that is not further processed. The resulting mixture of the silanized zeolite with the silicate building material preparation is usually in powder form, but it may also be in the form of pastes or slurries, depending on the mixing ratio of the components.
    The essential effect of the invention is that the proposed hydrophobizing treatment of the natural zeolite makes it possible to introduce it into building chemical preparations without adversely affecting the processability of the preparation and without reducing the sorptive properties of the zeolite in the preparation ♦ * * * «FQl '18 · become. Fortunately, this treatment is possible with relatively simple measures, such as spraying and simple mixing of zeolite powders or granules with commercial chemical silanization preparations, whereby the treatment is cost-effective and its economic use can gain considerable importance.
    Any natural zeolite may be taken as the natural zeolite, but preferably a clinoptilolite, chabazite, phillipsite, natrolite or erionite, more preferably a clinoptilolite, may be used.
    Obviously, by the hydrophobization of the zeolite, chemical reactions between the zeolite and the reactive siliceous components such as waterglass or silica sol, a combination of waterglass and silica sol or silicic acid ester of the building material preparation are reduced to such an extent that the observed and mentioned effects of the processing ability and the preservation of the sorption capacity of the zeolite sufficiently preserved. Nevertheless, the curing of the building material is not affected after its processing. of the
    These effects are all the more astonishing, since the person skilled in the art would expect the hydrophobization of the natural zeolite to bond or close the pores in the structure of the zeolite necessary for the maintenance of the sorption capacity and thus to no longer be able to perform their sorptive functions. Surprisingly, however, it was found that the treatment of the zeolite with silane in the ratio of 0.5 to 8% (w / w) based on the zeolite does not affect its sorption capacity in the processed siliceous building material. Furthermore, it is also surprising that this modifying treatment of the natural zeolite is completely sufficient in practice to improve the processability of the siliceous heat.
    To ensure building material preparation, and yet not affect the desired curing of the building material after its processing.
    The composite material according to the invention is sufficiently water repellent after its processing. If it is applied as a coating and hardens, it absorbs only a little liquid water. Most of the water rolls off its surface and does not wet it. However, it can absorb up to 30% (w / w) of the hydrophobized natural zeolite contained in gaseous water vapor and release it in dry ambient air as water vapor, as well as native, untreated natural zeolite. This effect is particularly evident when a clinoptilolite is taken as the natural zeolite. If the hydrophobic zeolite contained silicate building material in contact with atmospheric air, thereby creating a climate-regulating effect by the humidity at high humidity levels of the air is lowered and raised at low humidity level. In this way, the variations in humidity with varying water vapor load compared to a conventional building material are reduced and it creates a more even atmospheric climate.
    Another effect of the invention is that the silicate building materials obtained by the addition of the hydrophobized natural zeolite, the additional properties of the absorption of gaseous odors and pollutants, as it has the native zeolite. It is absorbed by this upgraded in its functions building material gaseous substances such as ammonia, methyl sulfide, dimethyl sulfide, dimethyl disulfide, volatile fatty acids, cresol and other odors to the same extent as this is the same amount of untreated zeolite. Clinoptilolite has particularly good absorption properties for gaseous substances, so it is particularly suitable. It has • T * · · * I * · • · * * V ** «* I * * * # * * 4 * 12 * / 18 .. ...... it has been shown that neither the incorporation of the silanized zeolite into the siliceous building material matrix nor the silanization of the zeolite to an extent between 0, 5 and 8% (w / w) reduce the absorption capacity for odor-intensive substances.
    The invention is explained in more detail below with reference to 5 examples.
    FIG. 1 shows a bar chart with the measured values of table 2 of example 2. FIG. 2 shows a bar chart with the measured values of table 3 of example 3.
    Example 1:
    A sample of clinoptilolite powders with grain sizes between 0 and 50 microns is silanized by spraying and simultaneously mixing with a solution of triethoxy (2,4,4-trimethylpentyl) silane and polydimethylsiloxane to 3.5% (w / w) (Sample 1). Another sample of clinoptilolite powder is not treated with a silane (Sample 2). From both samples, the initial moisture content of the powder is measured by drying at 105 ° C. Thereafter, both samples are exposed in the desiccator successively to a relative humidity of 65%, 95%, 65%, whereby in between the moisture of the powder was always determined by drying. The adjustment of the humidity took place in each case 24 h, the whole attempt took place with 21 ° C. The following table lists the moisture content or the water content of the powder: 13 · / 18
    Table 1: Determination of the absorption capacity of water vapor by untreated (Sample 2) and by hydrophobized clinoptilolite powder (Sample 1). 1st Humidity 2nd Humidity 3rd Humidity 4th Humidity (%) MW (%) (%) MW (%) (%) MW (%) (%) MW {%) Sample 1 5, 3 5.4 7, 1 7.2 12.8 12.8 7.4 7.3 Sample 1 5, 4 7.5 12.5 7.3 Sample 1 5, 4 7.0 13.2 7.2 Sample 2 5.8 5 , 8 7.7 7.9 14.3 14.2 7.9 8.0 Sample 2 5.9 7.8 14.4 7.4 Sample 2 5.7 8.2 13, 9 8.5
    Explanation of the table: 1. Humidity: Initial humidity to total humidity (saturation) 0%, 2nd humidity: equilibrium moisture content (equilibrium humidity) at 65% humidity, 3rd humidity: maximum humidity at> 95% humidity, 4th humidity: Back to dry at humidity 65 % on equilibrium moisture content (equilibrium moisture content), MW: mean value
    The result of example 1 clearly shows that the silanized clinoptilolite (sample 1), similar to the untreated, native clinoptilolite (sample 2), absorbs water vapor from the air and releases it again, depending on the degree of humidity of the air. This creates a climate-regulating effect.
    Example 2:
    Clinoptilolite powder of grain size 0 to 50 microns was prepared by spraying with a solution of 75% octyltriethoxysilane and 20% polydimethylsilane in the ratio 4% (w / w) based on 14 * / 1 "x *
    Clinoptilolite during the mixing process sprays and thus produced by a silanization hydrophobicized clinoptilolite. The hydrophobized clinoptilolite was added to a silicate render based on potassium silicate glass, so that the finished mixture had the following constituents (proportions in% w / w): water: 5.88; organic binder 50% styrene acetate solution: 9.5; 28% potash solution: 6; Calcium carbonate in the grain size 0-50 microns: 29; Calcium carbonate in the grain 1-1.5 mm: 19.50; Calcium carbonate with a grain size of 1.5-2.0 mm: 19.50; Titanium dioxide: 1.5; Mineral defoamer: 0.5; Additives: 1.7; Aggregates (fibers): 0.45. In one sample, hydrophobized clinoptilolite (7%) was added, in a second sample instead of native (non-hydrophobized) clinoptilolite was added, in another sample, another 7% were added calcium carbonate in the grain size 0-50 microns instead.
    As a measure of the processability, the slump (AM) was determined according to the European standard DIN EN 1060 Part 3 in cm at different times. The samples thus examined were PM-01 (silicate plaster without clinoptilolite); PM-02: (silicate plaster with native clinoptilolite); PM-03 (silicate plaster with hydrophobized clinoptilolite according to the invention). Triple confusion was performed.
    The results are shown in Table 2 and in Figure 1:
    Table 2: Determination of the slump (AM) according to DIN EN 1060 Part 3 in cm of silicate plaster without clinoptilolite (PM-01), of silicate plaster with unhydrophobized clinoptilolite (PM-02), and of silicate plaster with hydrophobized clinoptilolite (PM-03).
    Recipe no. : Duration IStd 2h 8h 2 4h d. 2d 7d 14d PM-01 21 21,3 22 22,1 22 21,8 22, 1 • · * »• · *»
    19118 PM-02 20, 5 18 16, 8 12,6 n.m. n.m. n.m. PM-03 21 20, 8 20 20, 1 19, 8 20.2 20 n.m. = not measurable / hardened * triple determination
    The results show in comparison between PM-01 and PM-03 that the hydrophobized clinoptilolite in the silicate-based silicate render (PM-03) does not affect the processability of the silicate render, whereas the waterglass silicate render with native clinoptilolite (PM-02) according to FIG Hours is no longer workable.
    Example 3:
    Grade 0 to 50 micron clinoptilolite powder was obtained by spraying with a solution of 75% octyltriethoxysilane and 20% polydimethylsilane in a ratio of 4% (w / w)
    Clinoptilolite during the mixing process sprays and thus produced by a silanization hydrophobicized clinoptilolite. The hydrophobized clinoptilolite was added to a silicate render based on silica sol, so that the finished mixture had the following constituents (proportions in% w / w): water: 5.63; organic binder 50%
    Styrene acetate solution: 9.5; 30% silica solution Klebsol 30V12: 6; Calcium carbonate in the grain size 0-50 microns: 29;
    Calcium carbonate in the grain 1-1.5 mm: 19.50;
    Calcium carbonate with a grain size of 1.5-2.0 mm: 19.50; Titanium dioxide: 1.5; Mineral defoamer: 0.5; Additives: 1.7; Aggregates (fibers): 0.45 ,. In a sample became even more hydrophobic
    Clinoptilolite (7%) was mixed in a second sample was instead still native (not hydrophobic)
    In another sample, another 7% calcium carbonate in the grain size 0-50 microns were added instead. • * * • * te / 18 ··
    As a measure of the processability, the slump (AM) was determined according to the European standard DIN EN 1060 Part 3 in cm at different times. The samples thus examined were PM-04 (silicate plaster without clinoptilolite); PM-05: (silicate plaster with native clinoptilolite); PM-06 (silicate render with hydrophobized clinoptilolite according to the invention). Triple determinations were made.
    The results are shown in Table 3 and in Figure 2:
    Table 3: Determination of the slump (AM) according to DIN EN 1060 Part 3 in cm of silicate plaster without clinoptilolite (PM-04), of silicate plaster with unhydrophobized clinoptilolite (PM-05), and of silicate plaster with hydrophobized clinoptilolite (PM-06).
    Recipe no. : Time IStd 2h 8h 24h d. 2d 7d 14d PM-04 20, 5 20, 7 21,1 21,1 21 21,5 21, 5 PM-05 17 15,3 n.m. n.m. n.m. n.m. n.m. PM-0 6 20,9 20 19,8 20, 2 20 19, 8 19, 8 n.m. = not measurable / hardened * triple determination
    The results show in comparison between PM-04 and PM-06 that the hydrophobized clinoptilolite in silica sol-based silicate render (PM-06) does not affect the processability of the silicate render, whereas the silica sol-silicate render with native clinoptilolite (PM-05) of FIG Hours is no longer workable.
    Example 4:
    A sample Klinoptilolithpulver with particle sizes between 0 and 50 microns is silanized by spraying and simultaneous mixing with a solution of triethoxy (2,4,4-trimethylpentyl) silane and Po.lydimethylsi loxan to 3.5% (w / w) (sample 1 ). Another sample of clinoptilolite powder is not treated with a silane (Sample 2). Each sample is placed in a quantity of about 10 g in a beaker, which is filled to about 75% with tap water, that is with about 150 mL and stirred with a magnetic stirrer. It is now judged how long it takes for the water to completely wet the surface of the clinoptilolite powder and sink to the bottom in the water.
    Sample 2 takes about 0.5 seconds to complete
    Wetting has taken place and the clinoptilolite powder sinks to the bottom.
    Sample 1 is not wetted with water at all during the observation period of 2 days and therefore does not sink to ground during this time.
    This example clearly demonstrates that the hydrophobization of the zeolite inhibits the uptake of liquid water.
    Example 5:
    The mixtures of Example 2 were ground after curing and used as powders &lt; 1mm grain size in the layer thickness of 1 mm each in a hermetically sealed 2 ~ liter
    Glass container strewn on the pasty fermentation content of a biogas plant. The fermentation content was filled to about 1-2 mm thickness in the glass jars and comes from the fermentation of slaughterhouse waste. He was very odor-intensive. Now, a Supelco portable field sampler # 504831 was held in the vessel to adsorb odors to the fiber of the sampling system. After 25 hours
    Conditioning the field sampler were analyzed by headspace GC-MS and identified and from the
    Odor concentration in the glass vessel determined. These
    Analytical method is known as solid phase microextraction and in J.Pawliszin, Solid Phase Microextraction, Theory and
    Practice, Wiley VCH 1997, described in detail. 18/18
    Table 4 shows the results of decreases of various odor-active substances after 25 hours incubation in the air atmosphere of the glass jars:
    Table 4: Decreases of odor-active substances after 25 hours in the gas atmosphere of incubation glasses with fermentation content and in each case one of the samples PM-01, PM-02 or PM-03 in percent of the concentrations of the time 0 hours:
    Compound PM-01 PM-02 PM-0 3 Dimethyl sulfide 82 91 55 Dimethyl disulfide 76 82 24 Cresol 92 94 49 Indole 80 73 38 Skatol 69 88 17
    The result of the experiment clearly shows that in all vessels a decrease of selected odorants could be detected after 25 h. In the vessel in which the mixture with the hydrophobized zeolite was used (PM-03), however, a significant decrease in concentration of all measured odorants compared to the two other vessels (PM-01 and PM-02) was observed, which the intact sorptive effect of the zeolite in the silicate binder system. The samples PM-01 and PM-02, however, show no significant difference from each other.
    权利要求:
    Claims (6)
    [1]
    Claims: 1. Application of hydrophobierta natural zeolite in silicate binder systems based on water glass, a combination of water glass and silica sol or silicic acid esters, characterized in that the hydrophobized zeolite is a hydrophobicized by silanization natural zeolite, and wherein the hydrophobization of the zeolite is such that after mixing the hydrophobized zeolite with water glass, silica sol or silicic acid on the one hand retained its absorption capabilities for odors, gaseous pollutants and water vapor, but on the other hand its absorption of liquid water is suppressed and the processability and stability of the silicate binder system is not affected by the addition of hydrophobized zeolite.
    [2]
    2. Application according to claim 1, characterized in that a clinoptilolite is taken as the natural zeolite.
    [3]
    3. Use according to claims 1 and 2, characterized in that the hydrophobized by silanization natural zeolite is silanized to at least 0.5% (w / w) and a maximum of 8% (w / w).
    [4]
    4. Application according to claims 1 and 2, characterized in that the hydrophobized by silanization natural zeolite is silanized to at least 3.5% (w / w) and at most 4% (w / w).
    [5]
    5. Application according to claims 1, 2, 3 and 4, characterized in that an octyltriethoxysilane or an aminopropylsilane is used as the silanizing agent.
    [6]
    6. Application according to claims 1, 2, 3, 4 and 5, characterized in that the silanizing agent is a * * · »f» siloxane, preferably polydimethylsiloxane. * * · »F» added
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    同族专利:
    公开号 | 公开日
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    法律状态:
    2018-06-15| MM01| Lapse because of not paying annual fees|Effective date: 20171018 |
    优先权:
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