DE102011011884A1 - Doped porous, amorphous glass particles of continuously produced glass foam - Google Patents

Abstract

The invention relates to porous, amorphous glass particles made of continuously foamed glass, which are doped with inorganic salts or organic compounds and used as functional additives or functional fillers, such as catalysts, siccatives, vulcanization activators, vulcanization accelerators or flame retardants, in monomers, prepolymers, polymers and / or Polymer mixtures can be used, it being possible for these to contain further additives or fillers and a method for producing these doped glass particles.

Description

The invention relates to porous, amorphous glass particles of continuously foamed glass, which are doped with inorganic salts or organic compounds. The doped glass particles can be used as catalysts, siccatives, vulcanization activators, vulcanization accelerators or flame retardants.

Organotin compounds, in particular mono-, di- and triorganotin compounds, are used as thermal and / or UV stabilizers in PVC, as catalyst in polyurethanes, silicones and other plastic compounds. Trialkyl and dialkyltin chloride are used in the tire industry for the modification of styrene-butadiene rubber (SBR). For the use of organotin compounds as catalysts in condensation-curing RTV-2 sealants (acetate, oxime and alkoxysilicones), paints and coatings so far no alternatives are known.

Triorganotin compounds have been widely used as a biocide in the past. Tributyltin, for example, also frequently occurs as an impurity of other organic tin compounds and is toxic even in the smallest amounts.

The 693 23 960 T2, for example, tin compounds are described as a catalyst in room temperature vulcanizable silicone rubber sealant (RTV rubber). There is called in particular dibutyltin dilaurate.

In the change of Directive 76/769 / EEC of 28 May 2009 Operating limits for trisubstituted organotin compounds, dibutyltin compounds and dioctyltin compounds in mixtures or products have been established. For some applications, transitional periods apply as there are currently no alternatives available.

Amorphous, porous glass particles doped with inorganic tin can be known to be used in some applications as an alternative to the organotin compounds previously used.

Zinc oxide is used in large quantities in the tire industry as a vulcanization activator. In particular, 0.5 to 8 percent by weight of zinc oxide are used for the tread mixtures of passenger car and truck tires. In this case, disadvantageously, a large proportion of the zinc oxide is released via the tire abrasion into the environment. This is to be regarded as negative especially in view of the fact that zinc oxide is toxic and harmful to the environment.

In the DE 60209895T2 For example, the addition of modified side group rubbers or terminal functional groups containing carboxylic acid or acid anhydride groups, or a polymerized metal salt of an unsaturated carboxylic acid, to tire blends is claimed to eliminate zinc oxide.

The use of zinc-doped glass particles with a high release of zinc ions makes it possible to dispense with the use of zinc oxide in the rubber mixtures and to significantly reduce the zinc content of the rubber mixtures as a whole.

in the EP 2009 051829 the use of precipitated silica with an Al ₂ O ₃ content of 0.3 to 0.8 wt .-% claimed to improve the Rohhmischeigenschaften (lower torque) and the Vulkanisationsverhalten.

In DE 103 22 214 A1 the use of Al ₂ O ₃ -containing precipitated silicas for tire mixtures is also claimed.

In DE 698 32 413 T2 For example, aluminum hydroxides and aluminum oxide hydroxides are claimed as fillers in rubber compounds for tire treads.

By doping the glass particles with a water-soluble aluminum salt, the surface of the glass particles can be changed. The sodium ion back-diffusion from the glass particles is reduced, depending on the amount of water-soluble aluminum salt used, resulting in improved incorporation of the glass particles into polymer systems, such as tire rubber blends.

in the DE 10 2007 043 311 compositions of polymers or their starting materials and silver-containing glass particles of glass foam are claimed with biocidal effect. The doping of the porous glass particles should be carried out primarily by ion exchange.

Desiccants are driers which are added to paints, coatings, printing inks and other oxidatively hardening products. They cause a fast surface drying and a uniform accelerated hardening of the coatings. Lead compounds have often been used as siccatives in the past, but have been banned for a number of years for their toxicity. At present cobalt compounds, in particular cobalt salts such as cobalt acetate, cobalt sulfate and cobalt nitrate, are frequently used. In the meantime, however, there is also a suspicion of carcinogenic effects in these cobalt compounds. That's why we are looking for alternatives here as well.

Partly therefore already organic cobalt, manganese and vanadium compounds are used, which are not carcinogenic.

Porous, amorphous glass particles doped with metal ions used in water-soluble or solvent-borne or oil-based paints, lacquers and paints can replace or supplement known siccatives. In this case, the metal ions or metals incorporated in the porous glass particles can be released diffusively in the color mixtures. Copper, zirconium, calcium, barium or zinc are preferred metals for doping the porous glass particles to achieve a siccative effect. However, other metals can be used as well. The doped metal-containing porous, amorphous glass particles can be used individually or in mixtures as siccatives in paints.

N-cyclohexyl-2-benzolthiazol-sulfenamide (CBS; trade name Vulkazit ^® CZ / EG-C; manufacturer Lanxess AG) is used as a vulcanization accelerator in vulcanizable rubber mixtures. The amount used is in the range of 0.1 to 2.5 percent by weight of the rubber mixture. CBS is incorporated as a powder or granules in the rubber mixtures.

Porous, amorphous glass particles can also be used as supports for CBS in order to achieve a better distribution and thus a reduction in the quantity of rubber mixtures. Many inorganic substances as functional additives are present in very small amounts in preparations or mixtures of monomers, prepolymers or polymers. Over-dosing is often used to ensure functional efficacy, as the homogeneous distribution of these functional additives is difficult. In addition, the release of the active ingredients of these functional additives within the mixture or preparation is often incomplete, leaving a high proportion without effect.

The object of the invention is to develop and propose environmentally friendly alternatives for additives or functional fillers in monomers, prepolymers, polymers or mixtures including corresponding production processes.

It has been found that by applying and incorporating these functional additives onto a support, in particular porous and amorphous glass particles of continuously foamed glass, the dispersion of the additives in the monomers, prepolymers, polymers or corresponding mixtures thereof can be improved. This leads to the reduction of the necessary amount of the functional additives. In addition, fillers, such as, for example, silica, glass fibers, small glass beads, calcium carbonate, talc, carbon black or quartz sand, are mixed in any case with many polymer blends in order to improve the mechanical properties. In this respect, the doped amorphous, porous glass particles can also take over the function of these fillers in whole or in part.

In the term "glass particles" as used in this application, "glass" refers to an amorphous solid which is thermodynamically regarded as a frozen, supercooled liquid and does not crystallize due to the rapid cooling of the melt.

The term "particle" refers to elementary particles as well as aggregates that consist of several elementary particles and that can be bound together by mass attractive forces or electrostatic forces.

"Glass particles of continuously foamed glass" refers to those in the patents DE 195 36 665 C2 . DE 195 36 666 C2 and DE 195 45 065 C2 described products of the method for Production of the glass foam, wherein the glass particles are produced from the glass foam by subsequent mechanical processes such as grinding and sifting.

The mean particle size of these porous, amorphous glass particles is less than 200 μm, preferably less than 100 μm, more preferably less than 10 μm. The particle size distribution can also include elementary particles smaller than 1 micron.

On the negatively charged surface and pore surface of the porous, amorphous glass particles are silanol groups of different binding, such as free silanol groups, silanol groups with bound water, Silanoldoppelgruppen on a silicon ion, siloxane bonds or hydrogen-bonded silanol groups, which are used to attach the metal ions or organic additives can. In addition, the glass framework is widened by the rapid cooling process in the production of the foam glass, which further possibilities for doping exist.

Doping of the amorphous, porous glass particles in the context of the invention means that metal ions are deposited on the surface of the glass particles. The term "surface of the glass particles" also includes the pore surface of the porous glass particles. Doping should also be understood to mean the incorporation of metals into the pores of the glass particles, this occurring at high concentrations and increased thermal treatment, ie high temperatures and / or long periods of thermal treatment, of the metal ions. A partial ion exchange with constituents of the glass matrix, primarily the sodium and potassium ions should also be understood as doping. This ion exchange takes place during the doping with noble metals (metals with high redox potential). The bond strength of the metal ions to the glass particle surface is dependent on the redox potential of the metal ions. Metal ions with high redox potential are more tightly bound to the glass particle surface than metal ions with low (negative) redox potential. This results in different release rates for the application of the doped porous glass particles as catalysts, siccatives, vulcanization activators, vulcanization accelerators or flame retardants, as shown in the examples. Thus, zinc ions which have a standard redox potential of -0.76 V (at 25 ° C., 101.3 kPa, pH = 0 and an ion activity of 1) can be released in the aqueous medium almost completely in the short term. Copper ions with a standard electron potential of +0.35 V (applies to the reaction ^Cu2 + + 2e ^- → Cu), however, are released in the aqueous medium only in small quantities in the short term. The different releases can be used as a short-term effect or as a long-term effect when using the doped porous glass particles in corresponding preparations.

The negatively charged surface of the alkaline porous glass particles is used for addition of the anions.

Doping also means that organic additives can be incorporated into the porous glass particles or bound to the surface.

The doped porous amorphous glass particles are preferably to be prepared by mixing the solid containing the doping substance or a solution containing the doping substance or an emulsion containing the doping substance or the emulsion containing the doping substance by conventional methods with the appropriate requirements glass particles, a subsequent thermal treatment and optionally a mechanical aftertreatment for deagglomeration of the doped glass particles.

In a particular embodiment of the solution according to the invention for producing the glass particles according to the invention, drying is carried out with the aim of achieving purely physical and / or chemical changes of the porous amorphous glass particles.

The doped amorphous porous glass particles may be deagglomerated after thermal treatment in a mill, such as a ball mill, planetary mill or tooth colloid mill.

In a further particular embodiment of the method for producing porous, amorphous glass particles, it is possible to realize the doping of the glass particles by chemical processes, such as precipitation, neutralization or the like.

Advantageously, the hitherto problematic release of the metal ions from the porous, amorphous glass particles can also be influenced by varying the parameters of the thermal treatment. Short times and low temperatures of the thermal treatment lead to a high short-term Release, while high temperatures and long periods of thermal treatment lead to lower but longer term release under comparable conditions. Thus, an adaptation to the requirements of the application can also be carried out by the process control of the doping.

A short-term catalytic effect by a high metal ion release can be done for example in the surface hardening of paints, varnishes or silicones. A slowed catalytic effect, caused by a delayed metal ion release, however, is advantageous where longer pot or molding times are required.

The effect of the functional additives can also be influenced by the amounts doped into the pores and on the glass particles. In addition, this can be used to control the necessary or permissible use amount of the doped glass particles in the various polymer blends.

Doped porous glass particles may replace other organic or inorganic catalysts, siccatives, vulcanization activators, vulcanization accelerators or flame retardants. In particular, carcinogenic, mutagenic or toxic organic functional additives can be replaced by the doped porous glass particles.

Frequently, functional additives are also introduced as organic compounds, some of which may have toxic, carcinogenic or mutagenic effects on humans or other animals. Metal ions from these organic substances can be primarily responsible for the functional effect. Also in this case, porous and amorphous glass particles of continuously foamed glass doped with metal ions, which ensure a high rate of release of the metal ions, can take over the function of the organic additives in polymers or polymer blends.

However, the glass particles doped with metal ions or organic substances can be used as catalysts, siccatives, vulcanization activators, vulcanization accelerators, UV stabilizers or flame retardants, without limiting the possibilities of application.

The introduction and distribution of the doped glass particles into the monomers, prepolymers or polymers or the mixtures thereof can preferably be effected by extrusion, kneading or mixing into the liquid phase. In the case of plastic compounds, the doped glass particles can also be mixed into the color or additive master.

Examples

The invention will be explained in more detail below with reference to preferred embodiments and features. However, the examples are not intended to limit the scope of the claims.

Production and characterization of the glass particles

The determination of the chemical glass composition ( ISO 52340 ) is performed by atomic absorption spectroscopy and X-ray fluorescence analysis. The particle size distribution is determined by means of laser diffraction (equipment: Sympatec Helos; DIN ISO 1332-1 ). D ₅₀ is the particle size at which 50 percent of the particles have a smaller or the same particle size. For the D ₉₉ , 99% of the particles are smaller than or equal to the specified particle size. The pH is determined in a 10% aqueous solution at room temperature accordingly DIN EN ISO 787-9 , Contrary to the standard, the eluate is prepared from 10 g of glass powder and 90 g of distilled water. The pH value is measured with the calibrated measuring device PM 2000 of Ingenieurgesellschaft mbH. The determination of the conductivity is carried out in 10% solution at room temperature DIN EN ISO 787-14 , Contrary to the standard, the eluate is prepared from 10 g of glass powder and 90 g of distilled water. The conductivity was measured with the PM 2000 of Ingenieurgesellschaft mbH. The moisture content of the glass particles became corresponding ISO 787-2 after 2 hours of drying in a convection oven at 105 ° C determined.

After measuring the electrical conductivity and the pH, the suspension is filtered. The filtrate is taken up in an Erlenmeyer flask or directly in a centrifuge tube. The filter cake is discarded. Since suspended particles greatly impair the measurement on the photometer due to turbidity, the sample material is then centrifuged. It was centrifuged at a speed of 3500 min ^{-1 for} 20 minutes.

In the examples, amorphous, porous glass foam glass particles having the following chemical composition were used: TABLE 1 Oxide Chemical composition [% by wt.] borosilicate glass Lime-sodium glass Na ₂ O 9.5 to 13.5 9.0 to 14.0 K ₂ O 1.0-4.0 0-1.0 MgO 0-2.0 1.5-4.0 CaO 1.0-5.0 9.0 to 13.5 Al ₂ O ₃ 4.0-7.0 1.0-2.5 SiO ₂ 55.0 to 60.0 71.0 to 74.0 B ₂ O ₃ 8.0-11.0 Fe ₂ O ₃ <0.2 ZnO 2.0-5.0 BaO 3.0-6.0 F ₂ <1.0

The glass was in a high-temperature extruder (according to the patent DE 195 45 065 C2 ) are processed to porous, amorphous foam glass. After the pre-crushing of the glass foam was carried out a grinding in a ball mill with parallel sighting.

Example 1:

Production of zinc-doped glass particles

The appropriate amount of zinc chloride (depending on the desired zinc content of the doped glass powder) was dissolved in distilled water. In this case, only a small amount of water was used to dissolve the zinc chloride to prevent the clumping of the glass powder during the mixing of the zinc chloride solution. The glass powder was in a plastic container mixed with a laboratory stirrer (400 min ^-1). With a squirt bottle, the zinc chloride solution was gradually added. After addition of the zinc chloride solution, mixing was continued for a further two minutes. The glass powder-zinc chloride mixture was then spread on a stainless steel sheet and processed in an oven at 190 ° C for two hours. The dried glass powder was then deagglomerated in a KK 100 tooth colloid mill.

The determination of the zinc ion content in the eluate was carried out with the photometer DR 2800 (manufacturer Hach-Lange GmbH). The cuvette test LCK 360 according to Hach-Lange was used. Table 2 Used glass particles Amount of glassy giblets [g] Zinc chloride [g] Zinc content ^{1 of} the dry mixture in% by mass Values Eluate from 10 g of glass powder and 90 ml of distilled water PH value electrical conductivity [ms] Zn ²⁺ in the eluate [mg / l] Borosilicate glass particles (D ₅₀ = 3.0 μm, D ₉₉ = 20 μm) 247.4 2.6 0.5 7.4 1.5 110 244.8 5.2 1 7.0 2.8 434 239.6 10.4 2 6.6 5.5 1360 238.0 12.0 2.3 6.4 6.5 1920 234.4 15.6 3 6.3 8.5 2430 229.2 20.8 4 6.2 10.9 3320 226.0 24.0 4.6 6.1 11.9 3810 224.0 26.0 5 6.0 13.5 4510 198.0 52.0 10 5.8 24.0 9820 ¹ zinc content in addition to the reported zinc oxide content of the glass matrix

Example 2

Production of aluminum-doped glass particles

The appropriate amounts of aluminum chloride and glass powder are weighed and mixed in a plastic container with a laboratory stirrer (400 min ^-1 ). Due to the moisture content of the glass powder (below 0.5%), the aluminum chloride already partially reacts with heat generation with the glass powder (exothermic reaction). Subsequently, an additional 2 ml of distilled water were metered to the mixture with the squeeze bottle to complete the reaction. After addition of the water, stirring was continued for 2 minutes. The mixture was then distributed on a stainless steel sheet and dried in a drying oven at 100 ° C for 2 hours. The moisture content subsequently decreased ISO 787-2 determined and was below 0.2 percent by weight for all samples. Table 3 Used glass particles Amount of glass particles [g] AlCl ₃ content [g] Al content ^{1 of} the dry mixture in% by mass Values Eluate from 10 g of glass powder and 90 ml of distilled water PH value electrical conductivity [mS] Borosilicate glass particles (D ₅₀ = 3.0 μm, D ₉₉ = 20 μm) 50,00 0.00 0.0 11.3 1.6 49.75 0.25 0.1 7.7 1.6 49,50 0.50 0.2 5.0 2.4 49,00 1.00 0.4 4.4 3.7 48.75 1.25 0.5 4.1 5.3 48,50 1.50 0.6 4.0 6.2 Lime-sodium-glass particles (D ₅₀ = 3.0 μm, D ₉₉ = 20 μm) 50.0 0 0 11.3 1.6 49.75 0.25 0.1 9.6 2.0 49,50 0.50 0.2 8.7 2.5 48.86 1.14 0.46 4.5 5.1 48.52 1.48 0.6 4.3 6.4 45.07 4.93 2.0 3.8 18.8 36.70 13,30 5.4 3.6 32.8 ¹ Aluminum content in addition to the reported aluminum oxide content of the glass matrix.pH value and conductivity in the eluate determined with the calibrated PM 2000 from Ingenieurgesellschaft mbH. The eluates were prepared from 10 g of glass powder and 90 g of distilled water.

Example 3

Production of tin-doped glass particles

The appropriate amounts of SnCl ₂ were dissolved in distilled water. Subsequently, the solution was mixed with a laboratory stirrer under the TP (400 min ^-1 ). Thereafter, a temperature treatment at 190 ° C for 90 minutes. The moisture content of the doped glass powder was then below 0.5 percent by weight.

The tin ion content in the eluate was determined with the photometer DR 2800 (manufacturer Hach-Lange GmbH). The cuvette test LCK 359 according to Hach-Lange was used. Table 4 Used glass particles Amount of glass particles [g] Tin chloride [g] Tin content of the dry mixture in% by mass Values Eluate from 10 g of glass powder and 90 ml of distilled water PH value electrical conductivity [mS] Sn ²⁺ in the eluate [mg / l] Borosilicate glass particles (D ₅₀ = 3.0 μm, D ₉₉ = 20 μm) 244.7 5.3 1.0 6.6 1.7 789 242.1 7.9 1.5 5.9 2.7 984 239.4 10.6 2.0 3.3 3.1 788 236.8 13.2 2.5 3.0 4.2 1040 223.6 26.4 5.0 2.5 8.9 3220 197.2 52.8 10.0 2.3 13.8 4180 Lime-sodium-glass particles (D ₅₀ = 3.0 μm, D ₉₉ = 20 μm) 247.4 2.6 0.5 10.3 1.6 172 244.7 5.3 1.0 8.8 2.1 677 242.1 7.9 1.5 8.2 2.6 937 pH value and conductivity in the eluate determined with the calibrated PM 2000 from Ingenieurgesellschaft mbH. The eluates were prepared from 10 g of glass powder and 90 g of distilled water.

Example 4

Production of copper-doped glass particles

The appropriate amounts of cupric chloride were dissolved in distilled water. Subsequently, the solution was mixed with a laboratory stirrer under the TP (400 min ^-1 ). Thereafter, a temperature treatment at 330 ° C for 45 minutes. The moisture content of the doped glass powder was less than 0.5 percent by weight.

Alternatively, it is also possible to use copper (II) chloride dihydrate, in which case an amount adjustment is necessary.

The copper ion content in the eluate was determined with the photometer DR 2800 (manufacturer Hach-Lange GmbH). The cuvette test LCK 329 according to Hach-Lange was used. Table 5 Used glass particles Amount of glass particles [g] Cupric chloride [g] Cu content of the dry mixture in% by mass Values Eluate from 10 g of glass powder and 90 ml of distilled water PH value electrical conductivity [mS] Cu ²⁺ in the eluate [mg / l] Borosilicate glass particles (D ₅₀ = 3.0 μm, D ₉₉ = 20 μm) 244.7 5.3 0.64 8.9 2.0 0.08 242.1 7.9 1.00 8.1 3.0 0.23 236.8 13.2 1.60 7.6 3.7 0.65 223.6 26.4 3.30 6.8 4.6 1.21 pH value and conductivity in the eluate determined with the calibrated PM 2000 from Ingenieurgesellschaft mbH. The eluates were prepared from 10 g of glass powder and 90 g of distilled water.

Example 5

Production of calcium-doped glass particles

For the doping of the porous, amorphous glass particles with calcium, calcium acetate [Ca (H ₃ CCOO) ₂ ] and calcium nitrate [Ca (NO ₃ ) ₂ ] were used. The calcium salts were dissolved in accordance with Table 6 in the amounts specified there distilled water and then mixed with the glass powder with a laboratory stirrer (400 min ^-1 ). Thereafter, the mixtures were spread on stainless steel sheets and there was a thermal treatment with the parameters given in Table 6 (temperature and duration). Table 6 Used glass particles Amount of glass particles [g] Ca (H ₃ CCOO) ₂ content [g] Amount of distilled water [g] Values Eluate from 10 g of glass powder and 90 ml of distilled water Temperature [° C] Duration [min] PH value Electrical conductivity [mS] Borosilicate glass particles (D ₅₀ = 3.0 μm, D ₉₉ = 20 μm) 224.0 76.0 140 90 140 9.0 14.0 224.0 76.0 140 150 140 9.4 13.5 Used glass particles Amount of glass particles [g] Ca (NO ₃ ) ₂ content [g] Amount of distilled water [g] Values Eluate from 10 g of glass powder and 90 ml of distilled water Temperature [° C] Duration [min] PH value electrical conductivity [mS] Lime-sodium-glass particles (D ₅₀ = 3.0 μm, D ₉₉ = 20 μm) 282.3 17.7 220 90 14.0 10.4 5.3 115.2 184.8 220 90 68.2 10.0 45.0 pH value and conductivity in the eluate determined with the calibrated PM 2000 from Ingenieurgesellschaft mbH. The eluates were prepared from 10 g of glass powder and 90 g of distilled water.

Example 6

Preparation of N-cyclohexylbenzothiazyl sulfenamide (CBS) doped glass particles

100 g pelleted CBS (trade name Vulkazit ^® CZ / EC C; manufacturer Lanxess AG) were weighed into a beaker. 200 ml of acetone were added and then stirred with a laboratory stirrer until complete dissolution of the CBS. 100 g porous, amorphous borosilicate glass powder made of glass foam (D ₅₀ = 3 microns, D ₉₉ = 20 microns) were then added with further stirring. After mixing with the glass powder, 150 ml of distilled water was added with further stirring to lower the dissolving power of the acetone. The mixture was mixed for a further 150 minutes with the laboratory stirrer, the viscosity increasing. The CBS was thereby deposited on the glass particle surface and in the pores of the glass particles. Thereafter, the mixture was spread on a stainless steel sheet. It was dried at 100 ° C in 120 minutes. Subsequently, the solid was ground in a planetary mill. The CBS-doped glass powder can be used, for example, as a vulcanization accelerator in vulcanizable rubber mixtures.

The doped porous, amorphous glass foam glass particles described in the examples can not only be used for the respective preferred application, but different effects can be used in different applications, such as the effect as catalyst, vulcanization activator, vulcanization accelerator, desiccant, flame retardant or UV -Stabilizer.

QUOTES INCLUDE IN THE DESCRIPTION

This list of the documents listed by the applicant has been generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Cited patent literature

• DE 60209895 T2 [0008]
• EP 2009051829 [0010]
• DE 10322214 A1 [0011]
• DE 69832413 T2 [0012]
• DE 102007043311 [0014]
• DE 19536665 C2 [0024]
• DE 19536666 C2 [0024]
• DE 19545065 C2 [0024, 0045]

Cited non-patent literature

• Directive 76/769 / EEC of 28 May 2009 [0005]
• ISO 52340 [0042]
• DIN ISO 1332-1 [0042]
• DIN EN ISO 787-9 [0042]
• DIN EN ISO 787-14 [0042]
• ISO 787-2 [0042]
• ISO 787-2 [0048]

Claims (13)

Porous, amorphous glass particles of continuously foamed glass, which are doped with metal ions or organic compounds and are to be used as functional additives or functional fillers in monomers, prepolymers, polymers and / or polymer blends, these blends may contain other inorganic substances as additives or fillers, and the metal ions or organic compounds are attached to the negatively charged surface including the pore surface of the porous glass particles and the binding of the metal ions or organic compounds is dependent on their redox potential and the conditions of the thermal treatment at the doping. Porous, amorphous glass particles according to claim 1, characterized in that the doping is carried out with a plurality of inorganic or organic substances. Porous, amorphous glass particles according to claim 1, characterized in that the inorganic substances are metal ions. Porous amorphous glass particles according to claim 3, characterized in that the metal ions are zinc, tin, aluminum, copper, calcium or zirconium ions. Use of porous, amorphous glass particles of continuously foamed glass doped with tin as catalysts in polyesters, room temperature curing silicones or polyurethanes. Use of porous, amorphous glass particles of continuously foamed glass, doped with copper, calcium, zirconium, zinc or other metals, as siccatives in paints, lacquers or coatings. Use of porous, amorphous glass particles of continuously foamed glass doped with zinc as vulcanization activator in vulcanizable rubber compounds. Use of porous, amorphous glass particles of continuously foamed glass doped with N-cyclohexylbenzothiazyl sulfenamide (CBS) as vulcanization accelerator in vulcanizable rubber mixtures. Use of doped porous, amorphous glass particles of continuously foamed glass as fillers for improving the mechanical properties in polymer blends. Method for producing the doped porous, amorphous glass particles, consisting of mixing the solid containing the doping substance or a solution containing the doping substance or a suspension containing the doping substance or an emulsion containing the doping substance by conventional methods with the glass particles, a subsequent thermal treatment and optionally a mechanical aftertreatment for deagglomeration of the doped glass particles. The method of claim 10, wherein the thermal treatment of the glass particles, including drying, is used for purely physical and / or chemical changes of the porous amorphous glass particles. A method according to claim 10, wherein the porous, amorphous glass particles are obtained by grinding and screening from continuously produced glass foam. The method of claim 10, wherein the doping of the glass particles by chemical processes, such as precipitation, neutralization or the like takes place.