EP3630702A1

EP3630702A1 - Process for producing composite particles and insulation material for the production of insulating products for the building materials industry, and corresponding uses

Info

Publication number: EP3630702A1
Application number: EP18728151.4A
Authority: EP
Inventors: Sandra LEHMANN; Klaus Riemann; Nils Zimmer; Fabio SOLA; Andreas GÖTZ
Original assignee: Huettenes Albertus Chemische Werke GmbH
Current assignee: Huettenes Albertus Chemische Werke GmbH
Priority date: 2017-05-30
Filing date: 2018-05-30
Publication date: 2020-04-08
Also published as: US20200308067A1; WO2018220030A1; MX2019014322A; US20230242455A1; KR20200015617A; JP2020521716A; BR112019025441A2; DE102017111836A1; KR102624132B1; MX2023012569A; CN110891917A; CN110891917B; EA201992846A1; US11603334B2

Abstract

What are described are a process for producing an insulating product for the building materials industry or an insulation material as an intermediate product for the production of such a product, and a corresponding insulation material or an insulating product. What are further described are the use of a matrix encapsulation method for producing composite particles in the production of an insulating product for the building materials industry or of an insulation material as an intermediate product for the production of such a product and the corresponding use of the composite particles producible by means of a matrix encapsulation method.

Description

Process for the production of composite particles and insulating material for the manufacture of insulating products for the building materials industry and corresponding uses

The present invention relates to a process for producing an insulating product for the building materials industry or an insulating material as an intermediate for producing such a product and a corresponding insulating material or an insulating product. The present invention also relates to the use of a matrix encapsulation method for the production of composite particles in the production of an insulating product for the building material industry or an insulating material as an intermediate for the production of such a product as well as the corresponding use of the composite particles which can be produced by a matrix encapsulation method.

Within the scope of the present documents, the term "building material industry" preferably includes the use of the articles according to the invention in the production or as insulating and insulating material for thermal insulation and sound insulation as well as in the production or as a material for the fire protection of buildings Articles as described herein in other industries, especially in the foundry industry, are not subject of the present invention.

The use of expandable and foam glasses, perlites, or pumice as insulating and insulating material in the building materials industry is known. In addition, already microglass hollow spheres and plastic balls used. Also, combination products are available on the market, for example the product "Aerosilex", which is offered as a blown aggregate of a combination of glass with silica.

The most commonly used insulation materials made of polystyrene. Because of their ease of flammability, the formation of toxic gases in the fire and disposal as hazardous waste, the market has long been looking for suitable alternatives. The use of phenolic foam products and polyurethane products is also in need of improvement because of their flammability and the emissions emitted by these products. The most common insulating materials based on organic polystyrene, phenolic foams and polyurethane, have a significantly lower thermal conductivity compared to the previously used inorganic insulating materials. The thermal conductivities are given for expanded polystyrene as 0,035-0,045 W / (m ^* K), for phenolic foams as 0,021 -0,024 W / (m ^* K) and for polyurethane as 0, 020-0, 025W / (m ^* K). However, the organic insulating materials are flammable - so components made of polyurethane are classified as "normal flammable" and "flame retardant". Polystyrene as an insulating material decomposes above 300 ° C and then drips off, which can lead to the expansion of emerging fires. The fire protection in polystyrene must therefore be prepared or increased by adding flame retardants. As flame retardants, bromine-containing compounds are usually used, but they are problematic because they can release hazardous gases in case of fire. Another important feature of insulating materials for use in the building materials industry is therefore a severe flammability, ideally, such insulating materials are not flammable.

One of the most important properties of insulating materials for use in the building materials industry is a good insulation effect, ie a low thermal conductivity. The thermal conductivity of expandable and foam glass is in the range of 0.038 to 0.050 W / (m ^* K). These inorganic substances melt at temperatures of about 700 to 800 ° C, but are not flammable.

Another important property of insulating materials for use in the Baustoffindust- rie is a low bulk density, so that the resulting components are lighter and the insulation effect can be further improved

Another important feature of insulating materials for use in the building materials industry is a high thermal stability, ie such materials should also at high Temperatures such as occur in a fire, as little as possible and ideally not deform. This ensures that components comprising such insulating materials remain stable for a long time even in the event of a fire and damage to buildings or a building collapse is avoided for as long as possible. Also, an important property of insulating materials for use in the building materials industry is high water resistance, especially for building protection.

Among the known inorganic insulating materials with flame-retardant properties include, for example, the fibrous crystallized silicate minerals such as asbestos. These are, however, because of the release of e.g. High risk of asbestosis for humans, such as asbestosis or an increase in the risk of developing lung cancer, is barely used today.

In the case of organic insulation materials, it is often stated that potentially harmful emissions may occur during use. For example, with phenolic foams, formaldehyde emissions must be expected. Another important feature of insulating materials for use in the building materials industry is therefore a low and preferably no emission of harmful substances.

In particular, when used in thin and thick plaster systems in addition to the important properties already mentioned above as additional properties of insulating high mechanical strength and high resistance to alkalis are of importance. Thus, some known glass-based or perlite-based materials can only be used to a limited extent in alkaline cleaning systems, since they are soluble at basic pH values. In addition, it is known that perlite absorbs water from the environment and then reacts. For the use in particular of plasters and a sufficient mechanical strength of the insulating materials is necessary - after all, these mixing processes and the application by spraying, filling or brushing survive without loss of function.

In particular, when used indoors, the insulating materials should also have a high whiteness, so that in addition to the functionality of the building materials and an attractive aesthetic effect is achieved. In addition, the further processing of materials with a high degree of whiteness is often easier, for example, in cases where later a different color is to be applied to the white background. The document WO 98/32713 describes a lightweight material containing expanded perlite and a method for producing the same.

The document WO 2005/087676 describes a process for the production of foam glass granules. The document WO 2012/031717 describes a heat-insulating fire protection molding and a method for its production.

The document DE-OS 2214073 describes a method and an apparatus for producing expanded ceramic products.

The document EP 0639544 describes netlike ceramic particles. Document DE 10 2015 120 866 A1 (corresponding to WO 2017/093371 A1) specifies a method for producing refractory composite particles and feeder elements for the foundry industry, corresponding feeder elements and uses. Non-refractory solids for reducing the melting point, in particular those having a melting point or a softening temperature lower than 1350 ° C., are not disclosed as constituents of the composite particles described therein.

It has been a primary object of the present invention to provide an improved process for producing an insulating product for the building materials industry or an insulating material as an intermediate product for the production of such a product, which are adapted to the practical requirements regarding the properties of the particles present in the insulating material without any particular effort can. The procedure to be specified should result in an insulating material comprising particles with a grain size of 10 mm or less. The particles should above all-depending on the individual embodiment of the process to be specified-have a low bulk density and / or an excellent insulating behavior, i. have a low thermal conductivity. Preferably, the method to be specified should comprise or enable the use or the preparation of filler particles which have one or more, preferably all, of the following properties:

an excellent insulation behavior (ie a low thermal conductivity), low or no flammability,

high thermal stability or stability (i.e. high and long-lasting mechanical stability even at high temperatures such as occurs in fires), little or no emission of harmful substances,

a high water resistance,

a high mechanical strength,

- a high resistance to alkalis,

- a high degree of whiteness, - good bulkiness,

a high sphericity,

- flowability, and

- a low bulk density of less than 500 g / L. The process to be specified for producing an insulating product for the building materials industry or an insulating material as an intermediate for producing such a product should be flexibly adjustable with regard to the production and use of variable sized filler particles. In particular, the process should enable the preparation and use of filler particles having a particle size of less than 10 mm, preferably less than 2 mm, in the manufacture of an insulating material. The filler particles to be produced and used should be capable of variable composition. Due to this variability and flexibility of the method to be specified, it should be possible to produce an insulating material whose material properties are individually adapted to the needs of the individual case. The process to be specified for the manufacture of an insulating product for the building materials industry or of an insulating material as an intermediate for the production of such a product should thus be more independent of the market availability of filler particles of defined size and composition than the previous corresponding methods.

It was a further object of the present invention to provide a corresponding insulating material or an insulating product. Other objects of the present invention will become apparent mutatis mutandis, from the foregoing and will be apparent from the corresponding explanations in the following text.

The invention and preferred combinations of preferred parameters, properties and / or constituents of the present invention are defined in the attached claims. Preferred aspects of the present invention are also set forth and defined in the following description and examples.

The stated primary object with regard to the method to be specified is achieved according to the invention by a method for producing an insulating product for the building material industry or an insulating material as an intermediate product for producing such a product, comprising the following steps:

(a) Producing composite particles having a particle size of less than 10 mm, preferably less than 2 mm, determined by sieving, in a matrix encapsulation method comprising the following steps:

(a1) producing drops of a suspension from at least the following starting materials: as dispersed phases

(i) one or more substances selected from the group consisting of phyllosilicates and clays,

(ii) additionally one or more density reducing substances selected from the group consisting of light fillers with a respective one

Bulk density in the range of 10 to 350 g / L, blowing agents and pyrolyzable fillers and (iii) in addition to components (i) and (ii), one or more non-refractory solids to reduce the melting point of the composite particles, and as a continuous phase

(iv) a solidifiable liquid,

(a2) solidifying the solidifiable liquid so that the drops harden to hardened drops and the (i) substance or substances selected from the group consisting of layered silicates and clays, (ii) density reducing substance or substances and / or (iii) not refractory solids are encapsulated in the solidifying continuous phase,

(a3) treating (preferably heat treating) the cured droplets to result in said composite particles, said treating comprising sintering the cured droplets.

The invention is based i.a. based on the knowledge that by matrix encapsulation (encapsulation) of the starting materials specified in step (a1) (see point (i) to (iv) in step (a1)) composite particles can be prepared which have the primary properties listed above.

Preferred is a method according to the invention as described above (in particular a method which is referred to as preferred in this text), comprising as additional step:

(b) preparing the insulating product for the building materials industry or the insulating material as an intermediate for producing such a product using the composite particles of step (a). Further preferred is a method according to the invention as described above (in particular a method, referred to above or below as preferred), wherein the produced insulating product for the building material industry or the produced insulating material as an intermediate product for producing such a product is selected from the group consisting of :

Indoor and outdoor wall and ceiling cladding, preferably foundations, lightweight panels, preferably lightweight panels in refurbishment and modernization, and / or acoustic panels;

Plaster systems, preferably thick-layer plaster systems, in interior and exterior areas, preferably renovation plasters, plaster and dry mortar systems, tile adhesives, construction adhesives, leveling compounds, fillers, sealants, fillers, wall fillers and / or clay plasters; Thin-layer systems, preferably emulsion paints and / or wallpapers and resin systems for the building materials industry, preferably polymer concrete and / or mineral cast, artificial stones, composite bricks and / or sanitary precast elements.

The composite particles produced in the process according to the invention have a particle size of less than 10 mm, preferably less than 2 mm, determined by sieving. The determination by sieving is carried out according to DIN 66165-2 (4.1987) using the method F mentioned there (machine screening with moving single sieve or sieve set in gaseous static fluid). A vibrating sieve machine of the type RETSCH AS 200 control is used; while the amplitude is set to level 2; there is no interval sieving, the sieving time is 1 minute.

The composite particles produced by the process according to the invention are furthermore non-flammable and nonflammable. Preferably, the composite particles produced by the process according to the invention are also free-flowing.

In the context of the present invention, a particle or material (for example a quantity of particles of the same composition) is considered to be thermally stable if the particle or the material does not melt below a given upper temperature limit (eg 1100 ° C.) or if it loses its value spatial shape softens or even decomposes. The term "producing drops of a suspension from at least the following starting materials" comprises "dropping a suspension of exclusively the following starting materials" and "producing drops of a suspension of the following starting materials and other starting materials". Encapsulation process "is understood in the present text to mean a process in which droplets of a suspension (or dispersion) are initially produced, wherein the suspension (or dispersion) comprises one or more solid or liquid substances present in a matrix (continuous Phase) are suspended. From the droplets composite particles are produced by solidification and optionally subsequent treatment. In its step (a), the method according to the invention comprises a specific matrix encapsulation method with the sub-steps defined above. From the matrix encapsulation process, a typical process for producing core-shell particles differs in that in core-shell particles, the shell material encases only a single core. This single core of a typical core-shell particle usually does not comprise a binder which binds other constituents of the core.

"Density-reducing substances" in the context of the present invention are substances whose use in the process according to the invention results in a reduced bulk density of the composite particles resulting in step (a3) being achieved, in comparison with a non-inventive (comparative process which is carried out in an identical manner However, depending on the treatment of a hardened drop, an applied blowing agent or pyrolysable filler used may or may not be pyrolysed. a3)) puffs an inserted blowing agent or pyrolyses an inserted pyrolysable filler, it fulfills the criterion "density-reducing".

"Light fillers" used according to the invention are fillers each having a bulk density in the range from 10 to 350 g / L. Preferred light fillers for use in the process according to the invention are spheres, preferably spheres of fly ash, such as Spheres "Fillite 106" from Omya GmbH, or Glass such as the glass with the name "GHL 450" of the company LÜH Georg H. Lüh GmbH, the product with the name "JJ Glass Bubbles" of the company Jebsen & Jessen GmbH & Co. KG, the product with the name " Q-cel®300 "from Potters Industries or the products" K1 "," K15 "or" K20 "from 3M. "Blowing agents" are substances which, upon treatment of the hardened drops in step (a3), eg during heating, inflate or release expanding gases and thereby generate voids in the composite particle.

"Pyrolysable fillers" are fillers that are partially or completely, preferably completely, pyrolyzed upon treatment of the cured drops in step (a3), for example, upon heating.

A pyrolyzable filler may simultaneously be a light filler having a bulk density in the range of 10 to 350 g / L. A pyrolyzable filler may simultaneously be a blowing agent. A blowing agent may simultaneously be a light filler having a bulk density in the range of 10 to 350 g / L. Composite particles which are produced in step (a) of the process according to the invention have, due to the use of the density-reducing substances in step (ii), a particularly low but individually adjusted bulk density according to the requirements of the individual case and in particular when blowing agents and / or pyrolyzable fillers are used a high, but individually adjusted according to the needs of the individual case porosity, so that the resulting individually manufactured composite particles have a high insulation effect and a low bulk density.

"Non-refractory solids" used according to the invention are inorganic solids which serve to reduce the melting point of the composite particles in step (a1) (see point (iii)). "Non-refractory solids" do not fulfill the requirements for fire resistance or to the criterion "refractory" according to DIN 51060: 2000-06.

Density-reducing substances according to step (a1), point (ii) of the process according to the invention can not also be "non-refractory solids" for the purposes of the present text.

Preference is given to a process according to the invention as described above (in particular a process which is referred to above or below as being preferred), the one or more non-refractory used as additional starting material (iii) Solids for reducing the melting point of the composite particles are inorganic materials selected from the group consisting of amorphous oxides, amorphous silicates, crystalline oxides and crystalline silicates and mixtures thereof, preferably selected from the group consisting of amorphous silicates and crystalline silicates, and / or (preferably "and") have a melting point or a softening temperature which is lower than 1350 ° C. The melting point or the softening temperature of the non-refractory solids used according to the invention is preferably determined by means of heating microscopy, preferably with a heating microscope EM 301 ( Type M17) from Hesse Instruments, Germany (see the relevant information on the website at the following address: http://www.hesse-instruments.de/content/products.php?Hllanq=en), preferably the following measuring conditions can be selected: 1. heating rate: 80K / min to z to reach 700 ° C (no holding time); 2. Heating rate: 50K / min until reaching 1500 ° C (no holding time) and 3. Heating rate with 10K / min until reaching 1650 ° C (holding time 5s). The softening temperature is determined according to the standard DIN 51730 (1998-4) (or ISO 540: 1995-03). It has been found that the use of the abovementioned non-refractory solids preferably used in accordance with the invention makes it possible to produce the composite particles at temperatures below 1000 ° C., but the composite particles produced nevertheless have a high thermal resistance (measured as "softening temperature"). , which is generally above 1000 ° C. The composite particles produced by the process according to the invention, non-refractory solids containing, however, have lower melting points in comparison with otherwise identical composite and prepared composite particles.

A process according to the invention as described above (in particular a process which is referred to as preferred above or below) is preferred, wherein the one or more non-refractory solids used as additional starting material (iii) are selected for reducing the melting point of the composite particles the group consisting of: glass flours, feldspar, boric acid and boron salts such as sodium tetraborate and sodium perborate, preferably the one or at least one of the plurality of non-refractory solids to reduce the melting point of the composite particles is selected from the group consisting of glass flours and albite, more preferably selected is from the group of glass flours with a brightness> 80, and / or is selected from the group of recycled glass flours. In the context of the present invention, the "whiteness" means the whiteness according to Tappi (whiteness R457), preferably measured with a Minolta CM-2600 d spectrometer (see manufacturer's instructions on its website at the address: https: //www.konicaminolta .eu / en / messqeraete / products / colorimetry / spectrophotometer-portable / cm-2600d-cm-2500d / technical-data.html), with the following settings: Medium orifice (MAV), measurement with and without gloss (SCI + SCE) and 0% UV content The measured values are read in accordance with the following specifications: standard illuminant C, observer angle 2 ° (C-2), without gloss and with 0% UV (SCE / 0). L ^* a ^* b values "used: D65-10, SCI / 0 (standard light D65, observer angle 10 ° (D65-10) including gloss and 0% UV (SCI / 0)) glasses having the criterion given above for light fillers a respective bulk density in the range of 10 to 350 g / L (see step (a1), point (ii) of Ver driving), for example foamed or expanded glasses, are not considered "non-refractory solids" for the purposes of the present text.

Glass powders are particularly suitable as non-refractory solids in the process according to the invention due to their already advantageous properties such as high grain strength, high whiteness, fire resistance (especially non-flammability), frost resistance, insulating effect and chemical resistance. Recycling glass flours require as a further advantage only a relatively low energy consumption in the production. Albite (also referred to as soda feldspar) has a comparatively low melting point and high whiteness, so that it is particularly suitable as non-refractory solid for use in the method according to the invention.

Particular preference is given to a process according to the invention as described above (in particular a process which is referred to above or below as preferred), wherein the total amount of non-refractory solids used as component (iii) in the range of 5 to 60 wt .-%, preferably in the range of 10 to 50 wt .-%, particularly preferably in the range of 20 to 40 wt .-%, based on the total mass of the suspension prepared in step (a1). Based on the total solids content of the suspension prepared in step (a1), the total amount of non-refractory solids used as component (iii) is preferably in the range from 2 to 20% by weight, more preferably in the range from 3 to 18% by weight .-% and most preferably in the range of 5 to 15 wt .-%.

Furthermore, preference is given to a process according to the invention as described above (in particular a process which is designated as preferred above or below), the non-refractory solids used as component (iii) having a particle size distribution determined by laser diffraction as the D50 value in the range of 3 to 60 μιη, preferably in the range of 4 to 50 μιη, more preferably in the range of 5 to 40 μιη. The particle size distributions determined in the context of the present invention as "D50 values" are preferably determined and indicated in a manner known per se by laser diffraction as D50 values of the cumulative frequency distribution of the volume-averaged size distribution function, ie that in each case 50% by volume of the corresponding investigated particles has a particle size The size distribution curve of the corresponding particles is preferably determined in accordance with ISO 13320-1 (1999), preferably with a "Mastersizer 3000" laser diffraction apparatus from Malvern, Great Britain, according to manufacturer's instructions. The evaluation of the scattered light signals is preferably carried out according to the Mie theory, which also takes into account refractive and absorption behavior of the corresponding particles.

The non-refractory solids used as component (iii) above may be used singly or in combination with each other. Preference is furthermore given to a method according to the invention as described above (in particular a method which is referred to above or below as preferred), wherein in step (a1) as colorant for white color, in component (i) one or more substances selected from the group consisting from phyllosilicates and clays and / or in component (iii) one or more non-refractory solids for reducing the melting point of the composite particles, preferably glass flours and / or albite, and / or as additional constituent one or more additional starting materials, preferably selected from the group the refractory solids, more preferably selected from the group consisting of titanium dioxide, cristobalite, alumina are used.

The possibility of using components in the process according to the invention which impart a high whiteness to the insulating products or insulating materials produced is a particular advantage of the invention. Insulating materials with a high degree of whiteness are in high demand in the building materials industry, as they not only have a high aesthetic effect, but also often facilitate practical finishing or further processing, in particular with paints. For example, on white surfaces, often less painting work is necessary, or paintings on white surfaces are often more color intensive or colourfast.

Also preferred is a method according to the invention as described above (in particular a method which is referred to above or below as preferred), wherein in step (a1) the production of drops by means of one or more nozzles, preferably vibration nozzles, takes place and / or in step (a2) the solidification of the solidifiable liquid is induced by cooling, drying or chemical reaction.

The use of one or more nozzles, preferably vibration nozzles, is preferred in step (a1) in order to produce the composite particles in a time-efficient manner and with as uniform as possible a grain size.

A method according to the invention as described above (in particular a method referred to above or below as preferred) is also preferred, wherein the solidifiable liquid used in step (a1) is a chemical-solidifiable liquid and in step (a2) solidifying the solidifiable liquid is induced by chemical reaction.

The solidification of the solidifiable liquid by chemical reaction has the advantage that this process is usually irreversible and also fast enough, so that when dripping and thus solidifying the solidifiable liquid, the solidifiable liquid usually retains the shape of the drop. Solidification by physical methods, e.g. Cooling or drying are reversible in some cases and may in these cases be e.g. be reversed by the supply of heat or moisture (at least partially).

Particularly preferred is a method according to the invention as described above (in particular a method which is referred to as preferred above or below), wherein the solidifiable liquid is a solidifiable by cation exchange reaction liquid, preferably by reaction with calcium ions and / or barium ions and / or manganese ions, preferably by reaction with calcium ions, solidifiable liquid.

Cation exchange reactions have the advantage in practice that they are regularly completed in a relatively short period of time. In step (a2), preference is given to carrying out a cation exchange reaction in which the solidifiable liquid contains monovalent cations and is brought into contact with calcium ions so as to solidify the solidifiable liquid; Instead of calcium ions but also barium ions or manganese ions can be used. Monovalent cations contained in the solidifiable liquid are exchanged for calcium ions in the preferred procedure to solidify the solidifiable liquid. Calcium ions have a good balance between charge and ion mobility. As a general rule The charge of the cation which is to be exchanged with the monovalent cation present in the solidifiable liquid should be as high as possible so that sparingly soluble compounds are formed during the cation exchange. However, the cation should also have the highest possible ion mobility, so that the desired chemical reaction proceeds as quickly as possible. The ion mobility of cations decreases with increasing cationic charge.

Particular preference is given to a process according to the invention as described above (in particular a process which is referred to above or below as preferred), wherein the solidifiable liquid is a liquid which can be solidified by reaction with calcium ions and which comprises one or more binders selected from the group consisting of Group consisting of alginate, polyvinyl alcohol (PVA), chitosan and sulfoxyethyl cellulose, and / or (preferably "and") an aqueous solution, wherein the solidifiable liquid is preferably an aqueous alginate solution, the solidifiable liquid particularly preferably an aqueous sodium alginate solution. natlösung is.

Alginate solutions, in particular sodium alginate solutions, preferably in the form of an aqueous solution, are particularly suitable for use as a liquid which can be solidified by reaction with calcium ions in a process according to the invention, since they are environmentally friendly, degradable and, in particular, non-toxic. In addition, such alginate solutions can be solidified reproducibly and standardized. The composite particles obtained in their own investigations, for the production of which alginate solutions were used as the solidifiable liquid, had a uniform structure with uniformly distributed or arranged particles.

Preferred is a method according to the invention as described above (in particular a method which is referred to above or below as being preferred), wherein the or at least one of the in step (a) as a density reducing substance of component (ii) used light fillers, preferably with a particle size smaller than 0.4 mm, more preferably smaller than 0.3 mm, most preferably smaller than 0.2 mm , determined by sieving (for determination method according to DIN 66165-2 (4.1987) see above), selected from the group consisting of: inorganic hollow spheres, preferably borosilicate glass, organic hollow spheres, particles of porous and / or foamed material, rice husk ash, nuclear Shell particles and calcined diatomaceous earth and / or wherein the or at least one of the blowing agent used as component (ii) in step (a) is selected from the group consisting of:

Carbonates, bicarbonates and oxalates, preferably with cations from the group consisting of alkali metals and alkaline earth metals, preferably calcium carbonates, hydrogen carbonates and oxalates, plant meals, preferably selected from the group consisting of coconut shell meal, preferably coconut shell meal with the name "Coconit 300" from the company Mahlwerk Neubauer-Friedrich Geffers GmbH, walnut shell meal, preferably walnut shell meal with the name "walnut shell meal 200m" from Ziegler Minerals, grape seed flour, preferably grape seed flour with the name "grape seed flour M100" from A + S BioTec, olive kernel flour, preferably olive kernel flour with the name "OM2000" or "OM3000" from the company JELU-Werk, wheat flour, preferably wheat flour with the name "flour 405" from the company Hummel, corn flour, preferably corn flour with the name "maize flour" MK100 "the company Hummel, wood flour, preferably wood flour with the name" wood flour Ligno-Tech 120mesh TR "the company Brandenburg Holzmü hle, sunflower husk flour and cork flour,

Strength,

potato dextrin,

Sugar, eg sucrose, Plant seeds, and

Rice husk ash, preferably rice husk ash with a high content of carbon, e.g. a rice husk ash with the name "Nermat AF (<80μιη)" from Refracture, and / or wherein the or at least one of the pyrolyzable fillers used as component (ii) in step (a) is selected from the group consisting of:

Plastic beads, preferably plastic beads "Expancel® 091 DE 80 d30" or "Expancel® 920 DE 80" from Akzo Nobel or plastic beads "SPHERE ONE EXTENDOSPHERES ™ PM 6550 Hollow Plastic Spheres" from KISH Company Inc. and

Styrofoam balls, preferably Styroporkugeln "F655-N" Fa. BASF.

Particular preference is given to a process according to the invention as described above (in particular a process which is referred to above or below as preferred), wherein the total amount of the density reducing substances used as component (ii) in the range of 2 to 40 wt .-%, preferably in the range from 5 to 30% by weight, particularly preferably in the range from 10 to 20% by weight, based on the total mass of the suspension prepared in step (a1). Based on the total solids content of the suspension prepared in step (a1), the total amount of the density-reducing substances used as component (ii) is preferably in the range from 0.5 to 14% by weight, particularly preferably in the range from 1.0 to 10 Wt .-% and most preferably in the range of 3 to 7 wt .-%.

Furthermore, a process according to the invention as described above (in particular a process which is referred to as preferred above or below) is preferred, the density-reducing substances used as component (ii) each having a particle size distribution in the region of 10 determined by laser diffraction as the D50 value to 250 μιη, preferably in the range of 20 to 150 μιη, more preferably in the range of 50 to 90 μιη have (for determination method, see above).

Furthermore, preference is given to a process according to the invention as described above (in particular a process which is referred to above or below as preferred), the total amount of light fillers used being in the range up to 30% by weight, more preferably in the range from 1 to 10% by weight. , particularly preferably in the range from 3 to 5 wt .-%, based on the total mass of the suspension prepared in step (a1), and / or the total amount of the blowing agent used in the range to 30 wt .-%, particularly preferably in the range of 1 to 20 wt .-%, particularly preferably in the range of 3 to 10 wt .-%, based on the total mass of the suspension prepared in step (a1), and / or the total amount of pyrolyzable fillers used in the range to 30 wt. %, more preferably in the range of 1 to 20 wt .-%, particularly preferably in the range of 3 to 10 wt .-%, based on the total mass of the suspension prepared in step (a1).

The above light fillers used as component (ii) may be used singly or in combination with each other. The above pyrolyzable fillers used as component (ii) may be used singly or in combination with each other.

Particular preference is given to a process according to the invention, wherein at least one of the blowing agents used as component (ii) in step (a) is selected from the group consisting of: - wood flour, preferably wood flour with the name "wood flour Ligno-Tech 120mesh TR" from the company. Brandenburg wood mill, Corn flour, preferably corn flour with the name "maize flour" MK100 "from the company Hummel,

Sugar, e.g. Sucrose.

The above blowing agents used as component (ii) may be used singly or in combination with each other.

The light fillers, blowing agents and pyrolyzable fillers used above as components (ii) can each be used individually or in combination with one another.

The above-mentioned density reducing substances (light fillers, blowing agents or pyrolyzable fillers) for producing composite particles having particularly low bulk density are widely available in the market. Their use in the process according to the invention enables the reproducible production of lightweight, flame-retardant insulating products for the building materials industry or of insulating materials for the production of such products, each with excellent insulating properties. Particular preference is given to a process according to the invention as described above (in particular a process which is referred to above or below as preferred), wherein in step (a1) one or more refractory solids are used as additional starting material for producing a further dispersed phase in a proportion of not more than 10 wt .-%, based on the total amount of solid constituents of the suspension prepared in step (a1), wherein preferably or at least one of the additionally used in step (a1) refractory solids is selected from the group consisting out:

Oxides of one or more elements selected from the group consisting of Si, Al, Zr, Ti, Mg and Ca, and Mixed oxides, each comprising one or more elements selected from the group consisting of Si, Al, Zr, Ti, Mg and Ca, wherein preferably the proportion of the total amount of the components from this group is not more than 10 wt .-%, based on the total amount the solid constituents of the suspension prepared in step (a1), wherein preferably the or at least one of the refractory solids additionally used in step (a1) is selected from the group consisting of:

Alumina (e.g., CAS No. 21645-51-2), zirconia (e.g., CAS number 1314-23-4), titania (e.g., CAS number 13463-67-7),

- silica (e.g., quartz with the CAS number: 14808-60-7 or glassy SiO 2 with the CAS numbers: 60676-86-0),

Magnesium oxide (e.g., CAS number: 1309-48-4),

Calcium oxide (e.g., CAS number 1305-78-8),

Calcium silicate (e.g., CAS number: 1344-95-2),

- phyllosilicates, preferably mica,

- aluminum silicates and

Magnesium aluminum silicate, preferably cordierite, wherein preferably the proportion of the total amount of the constituents from this group is not more than 10% by weight, based on the total amount of solid constituents of the suspension prepared in step (a1).

The term "refractory" in the context of the present invention has the meaning corresponding to the definition in the standard DIN 51060: 2000-06. The above-mentioned refractory solids may be used singly or in combination.

Refractory solids optionally used in step (a1) are preferably particles, preferably particles of refractory solids, preferably refractory solids having a particle size of less than 0.1 mm, preferably determined by sieving according to DIN 66165-2 (4.1987) using the process mentioned therein D (machine screening with resting single screen in gaseous agitated fluid, with air jet sieve).

The use of additional refractory solids can - depending on the intended use of the insulating product according to the invention or the insulating material as intermediate product - its degree of thermal stability and / or thermal resistance (flame retardancy) are varied.

It is also preferred that a method according to the invention as described above (in particular a method which is referred to above or below as preferred), wherein the or at least one of the substances used in step (a1) as a substance of the component (i) is selected from the group consisting of sheet silicates and clays which do not melt incongruently below 1500 ° C and / or is selected from the group consisting of - the sheet silicates kaolinite, montmorillonite and lllite, and the clays kaolin and bentonite.

The term "incongruent melting" in the context of the present invention and according to the meaning customary in the art means a melting process in which the solid starting phase decomposes on melting and / or reacts with the resulting liquid phase liquid phase has a different chemical composition than the solid starting phase. The phyllosilicates and / or clays preferably used in the process according to the invention, preferably clays, particularly preferably kaolin, can pass into a different phase of particular thermal resistance even at comparatively low temperatures during a thermal treatment in step (a3) and thus, inter alia, to a better thermal stability contributing to the composite particles produced. Such a phase transition can usually be detected by XRD measurement.

All of the above-mentioned species phyllosilicates and clays can also be used in mixture with one another.

The above preferred layered silicates may be used alone or in combination with each other.

Particularly preferred kaolins for use as sheet silicates in step (a1) are:

"Satintone® W" Fa. BASF

Kaolin calz. 3844 from Ziegler & Co. GmbH

The above particularly preferred kaolins may be used singly or in combination with each other.

A particularly preferred bentonite for use as clay in step (a1) is "Bentonit® Volclay" from the company Süd Chemie.

The above particularly preferred bentonites may be used singly or in combination with each other. Particular preference is given to a process according to the invention as described above (in particular a process which is referred to above or below as preferred), wherein the total amount of the phyllosilicates and clays used as component (i) in the range of 2 to 40 wt .-%, preferably in Range of 5 to 30 wt .-%, particularly preferably in the range of 10 to 20 wt .-%, based on the total mass of the suspension prepared in step (a1). Based on the total solids content of the suspension prepared in step (a1), the total amount of the layered silicates and clays used as component (i) is preferably in the range from 0.5 to 14% by weight, particularly preferably in the range from 1 to 0 10 wt .-% and most preferably in the range of 3 to 7 wt .-%. Furthermore, preference is given to a process according to the invention as described above (in particular a process which is referred to above or below as preferred), the phyllosilicates and clays used as component (i) each having a particle size distribution in the range from 1 to 30 μm, preferably in the range from 1 to 20 μιη, more preferably in the range of 1 to 10 μιη have, preferably determined by laser diffraction as D50 value as stated above

Preferred is a process according to the invention as described above (in particular a process which is referred to as preferred above or below), wherein the treatment according to step (a3) is carried out so that the bulk density of the resulting in step (a3) composite particles is lower than that Bulk density of the hardened droplets in the dried state (this is particularly easy when using density reducing substances selected from the group consisting of blowing agents and pyrolyzable fillers, if the treatment is carried out so that it leads to bloating of the blowing agents or to pyrolyzing the pyrolyzable fillers ) and / or the said composite particles resulting in step (a3) have a bulk density <500 g / L, preferably <400 g / L, more preferably <300 g / L.

In the context of the present invention, it has been recognized that, with targeted selection of the constituents (i), (ii) and (iii) and (iv) used in step (a1), a targeted treatment of the hardened droplets in step (a3) results in many The required bulk density reduction can be achieved (eg by pyrolyzing components or by reacting with the release of expanding gases). The dimensional stability or thermal stability of the resulting from the cured droplets composite particle is surprisingly not adversely affected.

Composite particles with a bulk density <500 g / L, preferably <400 g / L, particularly preferably <300 g / L, combine, inter alia, those suitable for use as insulating material in the building materials industry. industrially advantageous properties of a low bulk density, a high insulation effect and an adequate thermal resistance; therefore their use in the process according to the invention is particularly preferred.

In many cases, a process according to the invention as described above (in particular a process which is referred to as preferred above or below) is preferred, wherein the composite particles resulting in step (a3) wholly or partly a grain size <1, 5mm, preferably at least partially have a particle size in the range of 0.1 mm to 0.5 mm, more preferably at least partially have a particle size in the range of 0.1 mm to 0.3 mm, determined by sieving (for the determination method according to DIN 66165-2 (US Pat. 4.1987) see above).

Composite particles having a particle size of less than 1.5 mm and produced by the process according to the invention have a good bulkiness and can be processed particularly well as an insulating product for the building materials industry or as an insulating material as an intermediate product for this purpose; their preparation in step (a) of the process according to the invention is therefore preferred.

Frequently, a process according to the invention as described above (in particular a process which is referred to as preferred above or below) is also preferred, wherein component (ii) comprises one or more blowing agents as density-reducing substance or substances and the treatment according to step (a3) is carried out in this way that the one or more blowing agents puff and thereby form cavities in the resulting composite and / or one or more pyrolyzable fillers and the treatment according to step (a3) is carried out so that the pyrolyzed or more pyrolyzable fillers and thereby voids in the resulting Form composite particles.

The formation of cavities in step (a3) is a particular aspect of the present invention when using blowing agents or pyrolyzable fillers, since this significantly reduces the bulk density of the resulting composite particles and increases the insulating effect. Quantity and particle size of the blowing agents or the pyrolyzable fillers are relevant parameters for the bulk density and porosity of the resulting composite particles.

In many cases, a process according to the invention as described above (in particular a process which is referred to above or below as preferred) is preferred, wherein component (i) in step (a1) comprises at least one clay, preferably containing kaolinite and / or lllit, and / or wherein the treatment according to step (a3) comprises sintering at a temperature in the range of 900 to 980 ° C, preferably forming a sintered composite.

Under the conditions of the process according to the invention it has been possible to produce composite particles with a number of advantageous properties as insulating material for the building materials industry at a comparatively low temperature in the range of 900 to 980 ° C, preferably in the range of 930 to 970 ° C, and preferably with a treatment time in the range of 15 to 90 minutes, more preferably with a treatment time of 20 to 60 minutes, very particularly preferably with a treatment time in the range of 30 to 45 minutes.

Further preferred is a method according to the invention as described above (in particular a method which is referred to above or below as preferred), wherein during sintering in step (a3), a temperature of 1000 ° C is not exceeded.

A procedure at such a comparatively low temperature is particularly favorable, since the method in this way without special technical measures (as would be necessary when carrying out reactions above 1000 ° C), for example, in a conventional rotary kiln can be performed and a comparatively low energy consumption Has. It is achieved according to the inventive method already under these conditions, a sintering of the surface of the resulting composite particles, wherein the surface is reduced, but their internal porosity is not significantly reduced. As a result, this sintering leads to a once again significantly increased strength of the composite particles produced by the process according to the invention in comparison with composite particles produced by similar processes of the prior art. Preferred is a method as described above (in particular a method which is referred to above or below as preferred), wherein in step (a3) the hardened droplets are sintered so that solid particles result as an intermediate, and then the surface of these solid particles is sealed, preferably by means of an organic coating agent or a silicon-containing binder, so that the said composite particles result. In individual cases, the use of other inorganic coating composition is advantageous.

Preferably, in step (a3), the hardened drops are washed before sintering, and preferably the resulting washed drops are dried. Following the washing (and, if appropriate, drying), further treatment steps are then carried out, preferably treatment steps, as described above as being preferred.

In the manufacture of insulating products for the building materials industry or of an insulating material as an intermediate therefor by the process according to the invention and thus using composite particles prepared in accordance with the invention, a high porosity of the said composite particles is observed in many cases. If the abovementioned products or intermediates are further processed using binders, increased porosity can result in an increased consumption of binders. In particular, when using organic binders, this is undesirable because it can lead to increased costs and to absorb otherwise unnecessary and in the worst case harmful (harmful or fire-promoting) of other materials on the one hand. In order to reduce the binder consumption, it is therefore advantageous to seal the surface or the surface pores of said composite particles. A particularly preferred organic coating agent is egg white, which is preferably applied in the form of an aqueous solution. An aqueous egg white solution is preferably prepared by mixing a protein powder with water. Corresponding egg whisker solutions are e.g. made with:

Protein powder standard (product number 150061) from NOVENTUM Foods, - protein powder High Whip (product number 150062) from NOVENTUM Foods and Protein powder High Gel (product number 150063) from NOVENTUM Foods.

Egg white is particularly preferred as an organic coating agent because it seals the surface of the composite particles outstandingly and thus advantageously reduces their ability to absorb binder.

Particularly preferred non-organic coating agents are silicon-containing binders, preferably alkoxysilanes ("silanes") and / or alkoxysiloxane ("siloxane") mixtures, in particular the product SILRES® BS 3003 from Wacker Silicones Coating agents such as the preferred alkoxysilanes and alkoxysiloxane mixtures have the advantage of being water repellent and heat resistant.

The preferred coating agents as described above are readily available on the market, non-toxic and easily processable.

Preferred is a method as described above (in particular a method which is referred to above or below as being preferred), wherein the composite particles resulting in step (a3) are characterized by:

(A) a whiteness WG> 65, preferably WG> 80, particularly preferably WG> 90 (for determination method see above), and / or

(B) a thermal conductivity value at room temperature (20 ° C) yR <0.26 W / m ^* K, preferably <0.10 W / m ^* K, more preferably <0.07 W / m ^* K (for determination method, see below ), and or

(C) an alkali resistance, determined as weight loss when stored in sodium hydroxide solution at pH 14 for 30 days, of <9% by mass, preferably <8% by mass, particularly preferably <7% by mass (for determination method see below), based on composite particles having a particle size in the range of 0.5 to 1, 0mm, determined by sieving (for the determination method according to DIN 66165-2 (4.1987) see above), and / or (D) a grain strength> 1, 5 N / mm ² , preferably> 2.0 N / mm ² , more preferably> 4.0 N / mm ² , determined according to DIN EN 13055-1: 2008-08, Annex A ( process 1; 2 ^* 30 sec shake with amplitude 0.5) with a grain size in the range of 0.25 to 0, 5 mm, determined by sieving (for the determination method according to DIN 66165-2 (4.1987) supra), and / or

(E) a water absorbency, determined by the water absorption according to Enslin, of <2.5 mL / g, preferably <2.0 mL / g, more preferably <1.7 mL / g (for determination method see below), and / or

(F) a water solubility, determined as weight loss during storage in distilled water for 30 days, of <2% by mass, preferably <1% by mass, more preferably <0.2% by mass (for determination method see below), based on Composite particles having a particle size in the range of 0.5-1.0 mm, determined by sieving (for determination method according to DIN 66165-2 (4.1987) see above), and / or

(G) a softening temperature> 900 ° C, preferably> 1000 ° C, more preferably> 1200 ° C, determined by means of heating microscopy (for determination method see above).

In a particularly preferred embodiment of the process according to the invention or of a preferred process according to the invention, the composite particles resulting in step (a3) are characterized by:

(A) a whiteness WG> 65, preferably WG> 80, particularly preferably WG> 90, and

(B) a thermal conductivity value at room temperature (20 ° C) YR <0.26 W / m ^* K, preferably <0.10 W / m ^* K, more preferably <0.07 W / m ^* K, and (C) an alkali resistance, determined as weight loss when stored in sodium hydroxide solution at pH 14 for 30 days, of <9% by mass, preferably <8% by mass, particularly preferably <7% by mass, based on composite particles having a particle size in the range of 0.5 to 1, 0mm (for the method of determination see above), and

(D) a grain strength> 1, 5 N / mm ² , preferably> 2.0 N / mm ² , more preferably> 4.0 N / mm ² , determined according to DIN EN 13055-1: 2008-08, Annex A ( process 1; 2 ^* 30 sec shake with amplitude 0.5) with a grain size in the range of 0.25 to 0, 5mm (for the determination method see above), and

In the context of the present invention, the "thermal conductivity value" is determined according to the standard DIN EN 12667: 2001-05, determination of the forward resistance according to the method with the plate device and the heat flow measuring plate device (products with high and medium heat resistance).

In the context of the present invention, the "alkali resistance" of the composite particles is determined by the following method: 5 g of the composite particles to be examined are weighed, completely covered with aqueous sodium hydroxide solution (pH 14) and thus under laboratory conditions (25 ° C., normal pressure) for The composite particles are then filtered off from the sodium hydroxide solution, washed with water until neutral, dried (drying oven, 105 ° C., preferably to constant weight), and weighed The weight loss after storage in the sodium hydroxide solution in percent compared to the original Weighing weight of the composite particles is used as a measure of their alkali resistance.

In the context of the present invention, the "water absorbency" is determined according to the method according to Enslin.The method is known to the person skilled in the art and uses the so-called "Enslin apparatus", in which a glass suction chute is connected to a graduated pipette via a hose. The pipette is mounted horizontally so that it is level with the glass frit. A water intake of 1, 5 mL / g thus corresponds to a water absorption of 1, 5 ml of water per 1 g of composite particles. The evaluation is carried out according to DIN 18132: 2012-04.

In the context of the present invention, the "water solubility" of the composite particles is determined by the following method: 5 g of the composite particles to be investigated are weighed in and completely covered with water by adding 100 ml of aq., And so under laboratory conditions (25 ° C., normal pressure The composite particles are then filtered off, dried (drying oven, 105 ° C., preferably to constant weight) and weighed The weight loss after storage in water in percent compared to the original weight of the composite particles is used as a measure of their water solubility used.

In a particularly preferred embodiment of the process according to the invention or of a preferred process according to the invention, the droplets produced in step (a1) comprise a suspension as dispersed phases

(I) one or more substances selected from the group consisting of the layer silicates kaolinite, montmorillonite and lllit and the clays kaolin and bentonite in a total amount in the range of 2 to 40 wt .-%, preferably in the range of 5 to 30 wt. %, particularly preferably in the range from 10 to 20% by weight, based on the total mass of the suspension prepared in step (a1),

(ii) additionally one or more density reducing substances selected from the group consisting of

Light fillers having a bulk density in the range of 10 to 350 g / L and with a particle size of less than 0.4 mm, more preferably less than 0.3 mm, most preferably less than 0.2 mm, determined by sieving (for the determination method see above), selected from the group consisting of o inorganic hollow spheres, preferably of borosilicate glass, organic hollow spheres, particles of porous and / or foamed material, preferably porous and / or foamed glass, rice husk ash, core-shell particles and calcined diatomaceous earth, blowing agent selected from the group consisting of o carbonates , Bicarbonates and oxalates, preferably with cations selected from the group consisting of alkali metals and alkaline earth metals, preferably calcium carbonates, hydrogen carbonates and oxalates, o vegetable flours selected from the group consisting of coconut shell meal, walnut shell meal, grape seed flour, olive kernel flour, wheat flour Cornmeal, wood flour, sunflower husk meal and cork flour, and o starch, potato dextrin, sugar, plant seeds and rice husk ash and pyrolyzable fillers selected from the group consisting of: o plastic beads and o styrofoam balls in a total amount of from 2 to 40% by weight , preferably in the range of 5 to 30 Wt .-%, particularly preferably in the range of 10 to 20 wt .-%, based on the total mass of the suspension prepared in step (a1) and (iii) in addition to components (i) and (ii) one or more non-refractory solids to reduce the melting point of the composite particles selected from the group consisting of glass flours, feldspar (preferably albite), boric acid and boron salts, preferably sodium tetraborate and sodium perborate , in a total amount in the range of 5 to 60 wt .-%, preferably in the range of 10 to 50 wt .-%, particularly preferably in the range of 20 to 40 wt .-%, based on the total mass of in step (a1 ) prepared suspension.

The invention also relates to the use of a matrix encapsulation method, preferably using a nozzle, particularly preferably using a vibrating nozzle, for the production of composite particles having a bulk density <500 g / L, preferably <400 g / L, particularly preferably <300 g / L in the manufacture of an insulating product for the building materials industry or an insulating material as an intermediate for the production of such a product

This aspect of the invention is based i.a. on the surprising finding that the use of such prepared composite particles having a bulk density of <500 g / L, preferably <400 g / L, more preferably <300 g / L, very light, well insulating insulating products for the building materials industry or insulating materials as an intermediate for their preparation with preferably high alkali resistance results. With regard to preferred embodiments of such use, the explanations given for the method according to the invention apply correspondingly.

With regard to preferred embodiments of a use according to the invention of a matrix encapsulation method, the explanations given for the method according to the invention apply correspondingly, and vice versa.

Moreover, the invention also relates to the use of composite particles producible by a matrix encapsulation method, as an intermediate for the production of an insulating product for the building material industry or as an ingredient of an insulating product for the building material industry.

Preference is given to a use according to the invention of composite particles which can be produced by means of a matrix encapsulation process, wherein the composite particles are sealed composite particles, each consisting of a composite particle producible by a matrix encapsulation process and a shell of an organic coating agent surrounding and sealing the composite particle. Preference is also given to a use according to the invention of composite particles which can be produced by means of a matrix encapsulation process (or a corresponding use according to the invention given above), the intermediate product for producing an insulating product for the building material industry or the insulating product for the building material industry in or in

Indoor and outdoor wall and ceiling cladding, preferably foundations, lightweight panels, etc. in refurbishment and modernization and / or acoustic panels;

Plaster systems, preferably thick-layer plaster systems, indoors and outdoors, preferably in renovation plasters, plaster and dry mortar systems, tile adhesives, building adhesives, leveling compounds, fillers, sealants, fillers, wall fillers and / or clay plaster; thin-layer systems, preferably in emulsion paints and / or wallpapers and in - resin systems for the building materials industry, preferably in polymer concrete and / or mineral cast, artificial stones, composite bricks and / or sanitary precast is used.

With regard to preferred embodiments of a use according to the invention of composite particles which can be produced by means of a matrix encapsulation method, the explanations given for the method according to the invention and for the inventive use of a matrix encapsulation method apply correspondingly, and vice versa.

Furthermore, the present invention also relates to an insulating product for the building material industry or an insulating material for producing such a product, comprising a number of composite particles having a particle size of less than 10 mm, preferably less than 2 mm (for determination method see above) comprising

Sintering composite of particles of one or more non-refractory solids, embedded in the composite sintered particles of one or more substances selected from the group consisting of layered silicates and clays, wherein the insulating product for the building materials industry or the insulating material for producing such a product can be prepared by a method as described above (in particular a method, the above or hereinafter referred to as preferred) and / or the composite particles are characterized by

(E) a water absorption capacity, determined by the water absorption according to Enslin, of <2.5 mL / g, preferably <2.0 mL / g, more preferably <1.7 mL / g (for determination method see above).

With regard to preferred embodiments of an insulating product for the building materials industry or of an insulating material for producing such a product, the explanations given for the inventive method, for the inventive use of composite particles which can be produced by means of a matrix encapsulation method and for the inventive use of a matrix encapsulation method are respectively corresponding, and vice versa.

If the above-described insulating product according to the invention for the building material industry or insulating material for the production of such a product embedded in the sintered composite particles of one or more substances selected from the group consisting of phyllosilicates and clays, and can be prepared or prepared according to the above-mentioned inventive method ( in particular a method which is referred to above or below as preferred), wherein step (a3) comprises sintering the hardened droplets, preferably sintering at a temperature in the range of 900 to 980 ° C, the particles embedded in the sintering composite of one or more Substances may be or comprise either the phyllosilicates and / or clays originally used in step (a1), or phyllosilicates and / or clays completely or partially converted by sintering may have originated from these phyllosilicates and / or clays originally used in step (a1) ,

For example, certain clays - such as kaolins, eg "Chinafill 100" or "kaolin TEC" from the company Amberger Kaolinwerke and "Kärlicher Blautonmehl" from the company Kärlicher clay and Schamottewerke Mannheim & Co. KG - in a thermal treatment in step (a3) pass into another phase of particular thermal resistance even at comparatively low temperatures, thus contributing, inter alia, to a better thermal stability of the composite particles produced in processes according to the invention the hardened drop is heated to a temperature in the range of 900 to 980 ° C, so that, for example, kaolinite passes over intermediate phases in the refractory solid mullite.This phase transition can usually be detected by XRD measurement.

Preference is also given to an inventive or preferred insulating product according to the invention for the building material industry or insulating material for producing such a product, wherein the composite particles are additionally characterized by

(A) a whiteness WG> 65, preferably WG> 80, particularly preferably WG> 90 (for determination method see above).

Also preferred is an insulating product according to the invention for the building materials industry or insulating material for producing such a product as described above (in particular an insulating product for the building material industry or insulating material for producing such a product, which is referred to above or below as being preferred) the composite particles are also characterized by

(B) a thermal conductivity value at room temperature (20 ° C) YR <0.26 W / m * K, preferably <0, 10 W / m * K, more preferably <0.07 W / m * K (for the determination method see above), and / or (C) an alkali resistance, determined as weight loss when stored in sodium hydroxide solution at pH 14 for 30 days, of <9% by mass, preferably <8% by mass, particularly preferably <7% by mass, based on composite particles having a particle size in the range of 0.5-1.0mm (for the method of determination see above), and / or

(F) a water solubility, determined as weight loss during storage in distilled water for 30 days, of <2% by mass, preferably <1% by mass, more preferably <0.2% by mass, based on composite particles having a particle size in the range from 0.5-1.0mm (for determination method see above), and / or

Also preferred is an insulating product according to the invention for the building material industry or insulating material for producing such a product as described above (in particular an insulating product for the building material industry or insulating material for producing such a product, which is referred to above or below as preferred) in the sintered composite of particles of one or more non-refractory solids, a non-refractory solid or at least one of the plurality of non-refractory solids, selected from the group consisting of amorphous oxides, amorphous silicates, crystalline oxides and crystalline silicates and mixtures thereof, are preferably selected from the group consisting of amorphous silicates and crystalline silicates, and / or (preferably "and") has a melting point or a softening temperature, which is lower than 1350 ° C. In many cases, an insulating product according to the invention is also preferred for the building material industry or insulating material for producing such a product as described above (in particular an insulating product for the building material industry or insulating material for producing such a product, which is referred to as preferred above or below) the composite particles as colorants for white paint one or more substances selected from the group consisting of layered silicates and clays, as embedded in the sintered composite particles, and / or one or more non-refractory solids, preferably albite, as part of the sintering composite, and / or as additional constituent one or more additional starting materials, preferably selected from the group of refractory solids, particularly preferably selected from the group consisting of titanium dioxide, cristobalite and alumina.

Further, in many cases, an insulating product according to the present invention is also preferable for the building material industry or insulating material for producing such a product as described above (particularly, an insulating product for the building material industry or insulating material for producing such a product, referred to above or below as preferable) wherein the composite particles as colorant for white color one or more substances selected from the group consisting of phyllosilicates and clays, as embedded in the sintered composite particles and / or one or more non-refractory solids, preferably albite, as a constituent of the sintered composite, and / or as an additional constituent one or more additional starting materials, preferably selected from the group of refractory solids, more preferably selected from the group consisting of titanium dioxide, cristobalite and alumina.

Preference is also preferably given to an insulating product according to the invention for the building material industry or insulating material for producing such a product as described above (in particular an insulating product for the building material industry or insulating material for producing such a product, which is referred to above or below as being preferred) embedded as lightweight fillers in the sintered composite organic hollow spheres with a particle size less than 0.4 mm, more preferably less than 0.3 mm, most preferably less than 0.2 mm, determined by sieving (for determination method, see above).

Likewise preferred is also an insulating product according to the invention for the building material industry or insulating material for producing such a product as described above (in particular an insulating product for the building material industry or insulating material for producing such a product, which is referred to above or below as being preferred) embedded in the sintered composite particles of one or more substances selected from the group consisting of layered silicates and clays which do not melt congruently below 1500 ° C and / or which are selected from the group consisting of the layer silicates kaolinite, montmorillonite and lllit, and the clays kaolin and bentonite.

Further, in many cases, it is also preferable to use an insulating product according to the invention for the building material industry or insulating material for producing such a product as described above (in particular, an insulating product for the building material industry or insulating material for producing such a product, which is referred to as preferred hereinbefore) a number of composite particles having a particle size <1.5 mm, preferably a particle size in the range from 0.1 mm to 0.5 mm, particularly preferably a particle size in the range from 0.1 mm to 0.3 mm, determined by sieving (for determination method see above).

The present invention will be explained in more detail below with reference to the figures and by way of example.

FIG. 1: FIG. 1 shows composite particles C19 according to the invention after sintering (heating to 950 ° C. for 30 min., Step (a3)). Light micrograph, 200x magnification.

As can be seen in FIG. 1, a sintering composite was formed within an (individual) composite particle under the process conditions. Such a sintered composite is the cause of the exceptional mechanical strength of the composite particles according to the invention.

2: In FIG. 2, the shape of the sample cube (projection) pressed from the commercially available expanded glass Liaver® (for further details see example 2) is shown before the beginning of the heating microscopy. The figure is characterized by the following related technical data:

18 ° C / 00:00:00 // area: 100% / form factor: 0.682 // height: 100% / width: 100% // corner angle left: 78 ° / right: 70 ° // wetting angle left: 1 18 ° / right: 84 ° FIG. 3: In FIG. 3, the shape of the test cube pressed from the commercial expanded glass Liaver®, which has been modified by the influence of temperature, is shown at the temperature of 1250 ° C. (projection). The figure is characterized by the following related technical data: 1250 ° C / 00:23:51. It can be clearly seen that at a temperature of 1250 ° C, the original cube shape has been lost and the expanded glass completely melted. This indicates that conventional Liaver® expanded glass has no heat resistance up to 1250 ° C.

4: In FIG. 4, the shape of the sample cube (projection) pressed from the commercial foam glass Poraver® (for further details see example 2) is shown before the beginning of the heating microscopy. The figure is characterized by the following related technical data:

22 ° C / 00:00:00 // area: 100% / form factor: 0.716 // height: 100% / width: 100% // corner angle left: 82 ° / right: 100 ° // wetting angle left: 71 ° / right: 81 ° Fig. 5: In Fig. 5 the modified by temperature influence shape of the pressed from the commercial foam glass Poraver® sample cube at the temperature of 1250 ° C is shown (projection). The figure is characterized by the following related technical data: 1250 ° C / 00:22:13.

It can be clearly seen that at a temperature of 1250 ° C the original cube form has been lost and the foam glass has completely melted. This indicates that the conventional Poraver® foam glass has no heat resistance up to 1250 ° C.

FIG. 6: FIG. 6 shows the shape of the sample cube (projection) pressed from composite particles C19 produced by the process according to the invention before the start of the heating microscopy. The figure is characterized by the following related technical data:

20 ° C / 00:00:00 // area: 100% / form factor: 0.722 // height: 100% / width: 100% // corner angle left: 95 ° / right: 88 ° // wetting angle left: 97 ° / right: 76 °

FIG. 7: In FIG. 7, the shape of the sample cube (projection) pressed from composite particles C19 produced by the process according to the invention is at the temperature of 1250 ° C imaged. The figure is characterized by the following related technical data: 1250 ° C / 00:23:49.

It can be clearly seen that at a temperature of 1250 ° C, the original cube shape has been largely retained, only the cube dimensions are reduced (sintering). This indicates that composite particles C19 prepared by the process according to the invention are heat-resistant up to 1250 ° C.

Examples:

In the following, the present invention is explained in more detail by means of examples:

Determination or measurement methods: 1. Grain size determination:

The particle sizes of composite particles are determined by sieving in accordance with DIN 66165-2 (4.1987) using the method F mentioned there (machine screening with moving single sieve or sieve set in gaseous static fluid). A vibrating sieve machine of the type RETSCH AS 200 control is used; while the amplitude is set to level 2; there is no interval sieving, the sieving time is 1 minute.

The determination of the particle sizes of light fillers used in step (a) as a density-reducing substance of component (ii) is also carried out according to DIN 66165-2 (4.1987) using the method F mentioned therein (machine screening with moved single sieve or sieve set in gaseous static fluid ). A vibrating sieve machine of the type RETSCH AS 200 control is also used; while the amplitude is set to level 2; there is no interval sieving, the sieving time is 1 minute.

The determination of the particle sizes of refractory solids with a particle size of less than 0.1 mm is carried out by sieving in accordance with DIN 66165-2 (4.1987) using the method D mentioned therein (machine sieving with resting single sieve in gaseous agitated fluid, with air jet sieve). , 2. Determination of bulk density:

The bulk density of the samples was determined according to DIN EN ISO 60 2000-1. 3. Determination of water absorbency:

The determination of the water absorption capacity of the samples was determined according to the Enslin method by means of an "Enslin apparatus", in which a glass suction chute was connected to a graduated pipette via a tube and the pipette was mounted exactly horizontally so that it was level with the glass frit A water absorption of 1.5 mL / g thus corresponds to a water absorption of 1.5 mL of water per 1 g of composite particles The evaluation was carried out in accordance with DIN 18132: 2012-04 4. Determination of the Chemical Composition and Morphology:

To determine the morphology, a VisiScope ZTL 350 light microscope with Visicam 3.0 camera was used.

5. Determination of whiteness

The whiteness of the samples was measured according to Tappi (whiteness R457) using a Minolta CM-2600 d spectrometer (see manufacturer's information on its website at: https://www.konicaminolta.eu/en/messqeraete/produkte/ colorimetric-measurement / spectrophotometer-portable / cm-2600d-cm-2500d / technical-data.html), with the following settings: middle orifice (MAV); Measurement with and without gloss (SCI + SCE) and 0% UV content. The measured values are read in accordance with the following regulations: standard illuminant C, observer angle 2 ° (C-2), without gloss and with 0% UV (SCE / 0). The following "L ^* a ^* b values" are used: D65-10, SCI / 0 (standard light D65, observer angle 10 ° (D65-10) including gloss and 0% UV (SCI / 0).

6. Determination of the thermal conductivity value

The thermal conductivity values of the samples were determined according to the standard DIN EN 12667: 2001-05, determination of the on-resistance according to the method with the plate device and the heat flow measuring plate device (products with high and medium heat resistance). 7. Determination of alkali resistance

The alkali resistance of the samples (composite particles) was determined by the following method: 5 g of the composite particles to be investigated were weighed, completely covered with aqueous sodium hydroxide solution (pH 14) and left to stand under laboratory conditions (25 ° C., normal pressure) for 30 days , The composite particles were then filtered off from the sodium hydroxide solution, washed with water until neutral, dried (drying oven, 105 ° C.) and weighed. The weight loss after storage in the sodium hydroxide solution compared to the original weight of the composite particles was used as a measure of their alkali resistance. 8. Determination of water solubility

The water solubility of the samples (composite particles) was determined according to the following procedure: 5 g of the composite particles to be investigated were weighed in and, by addition of 100 ml of aq. completely covered with water and allowed to stand under laboratory conditions (25 ° C, normal pressure) for 30 days in a closed glass vessel. Subsequently, the composite particles were filtered off, dried (drying oven, 105 ° C) and weighed. The weight loss after storage in water compared to the original weight of the composite particles was used as a measure of their water solubility.

9. Determination of the softening temperature of composite particles according to the invention The softening temperature of the samples was determined by means of heating microscopy with a heating microscope EM 301 (type M17 from Hesse Instruments, Germany (see the relevant information on the website at the following address: http: //www.hesse- instruments .de / content / products. php? Hllanq = en), with the following measuring conditions selected: 1. Heating rate: 80K / min until reaching 700 ° C (no hold time) 2. Heating rate: 50K / min until reaching 1500 ° C (no holding time) and 3rd heating rate with 10K / min until reaching 1650 ° C (holding time 5s) The time of reaching the softening temperature was in accordance with the standard DIN 51730 (1998-4) (or ISO 540: 1995-03).

Example 1 Production of Composite Particles by the Process According to the Invention According to step (a) of the process according to the invention, composite particles (C01, C17, C19, C23, C27, C29 and C30) were prepared having a particle size of less than 10 mm, preferably less than 2 mm (hereinafter also referred to as "composite particles according to the invention"):

(a1) Preparation of drops of a suspension of starting materials:

A 1% strength aqueous sodium alginate solution (1% by weight of sodium alginate from the company Alpichem with CAS No. 9005-38-3 based on the total mass of the aqueous solution) was prepared.

The dispersant Sokalan® FTCP 5 from BASF was diluted with water to prepare a corresponding dispersing solution; the mass ratio Sokalan® FTCP 5 to water was 1: 2. The prepared 1% sodium alginate aqueous solution and the prepared dispersing solution were then mixed in a mixing ratio shown in Tables 1a and 1b, respectively, to give a solidifiable liquid (solidifiable liquid for use as a continuous phase in the sense of the component (iv) according to the step (a1)).

With stirring, selected phyllosilicates and / or clays (constituent (i) according to step (a1)) and non-refractory solids (constituent (iii) according to step (a1)) were then added to the solidifiable liquid according to the following table 1a or 1b added until a creamy suspension was formed.

With further stirring, density-reducing substances (constituent (ii) according to step (a1), light fillers, blowing agents or pyrolysable substances, in each case according to Table 1a or 1b) were subsequently added to the creamy suspension in an amount according to Table 1 below. and subsequently an amount of water according to Table 1a or 1b.

This resulted in each case a dilute suspension.

Table 1a: Ingredients for the production of composite particles according to the invention and their resulting bulk densities Composition of the suspension

ingredients

Starting material (parts by weight)

Component manufacturer

Kaolin Satintone® W;

(i) BASF 15.5 15.5 10.6 10.6 CAS RN

Layer 92704-41 -1

Silicate or clay

bentonite

[Wt .-%]

Volclay®

(i) Clariant 3.1 3.1 - - CAS RN

1302-78-9

Albit 45

(Feldspar) Ziegler & Co.

(Iii) - - 10,6 10,6 CAS RN GmbH

68476-25-5

Poraver¬

Non-flour (glass

Dennert Poraver

flammable (iii) flour) CAS 15.5 15.5 14.2 16.0

GmbH

ter FestRN 65997- substance 17-3

Flatglass meal DIN

(Iii) 100, CAS - - - - RN65997- 17-3

Borsilikatglaskugeln

LeichtCAS RN 3M Germany

filler (ü) 0,5 - - -

65997-17-3 GmbH

[Wt .-%]

and 7631-86-9

Kunststoff¬

Kish Company

PM - - - -

Pyroly- (ü) ku

Inc.

6550

sierbarer

filler

Plastic [wt .-%]

(ii) balls Ex Akzo Nobel - 0.5 0.8 0.8 pancel®

920 DE 80 Composition of the suspension

ingredients

Starting material (parts by weight)

Component manufacturer

CAS RN

38742-70-0

1%

Sodium sodium alginate (iv) ginate; CAS: App 45.5 45.5 46.7 46.7 solution 9005-38-3

[Wt .-%]

Sokalan.RTM

Disper- FT CP5 in

greedy water

(iv) BASF 2,8 1, 8 1, 9 1, 9 solution (1 .2)

[Wt .-%]

water

18.2 18.2 14.3 12.5 [wt%]

Resulting Kompositparti¬ invention

C01 C17 C19 C23

Resulting bulk density [g / L], based on

430 420 340 370 grain sizes 0-1, 5 mm

Table 1 b: Ingredients for the production of composite particles according to the invention and their resulting bulk density (continuation of Table 1a)

For more information on the ingredients in Tables 1a and 1b (for the respective determination methods of the parameters see above):

- Kaolin Satintone® W: "Whitetex", bulk density 500 g / L; D50 = 1, 4 μιη (manufacturer's data)

- Bentonite Volclay®: Bulk Density 800-950g / L; D50 = 4 μιη (manufacturer)

- Albite 45: D50 = 7μιη; Whiteness R457 91, 9% (manufacturer's information)

Poravermehl (glass flour): D50 = 45 μιη (manufacturer)

Flat glass powder DIN 100: from ground flat glass shards, bulk density 1, 2 g / L; Whiteness R457 89%. The term "DIN 100" means that the flat glass powder is in the ground state, and after sieving a sample of this component with a test sieve with a nominal mesh size of 100 μιη (according to DIN ISO 3310-1: 2001-09) a residue in the range of 1 to 10% by weight remains, based on the amount of sample used.

Borosilicate glass spheres: Product name: "3M Glass Bubbles K1"; Bulk Density of 125 g / L - Plastic Spheres PM 6550 Sphere One Extendospheres®, Bulk Density of 50 g / L; Grain Size: 10-200 μιη

- Plastic ball Expancel® 920 DE 80: Bulk density of 27 - 33 g / L; D50 = 55 - 85 μιη (manufacturer)

(a2) Solidification of solidifiable liquid The diluted suspension was filled in each case in plastic syringes and clamped in a spray pump (type LA-30). The feed was 12 to 15 ml / min. The diluted suspension in the syringes was then forced through a vibrating nozzle so that the diluted suspension dripped out of the vibrating nozzle in even drops. The droplets dropping out of the vibration nozzle fell into a 2% aqueous calcium chloride solution (CaCk, product name "Calcium Chloride 2-hydrate powder for analysis ACS" from Applichem, CAS No. 10035-04-8, 2 wt. % by weight based on the total mass of the calcium chloride solution) and solidified to harden to form hardened droplets and thereby the "phyllosilicates or clays", the "non-refractory solids", the "pyrolysisable fillers" and the "light fillers" ( according to Table 1a or 1b) were encapsulated in the solidifying mixture (consisting of the 1% sodium alginate solution and the dispersing solution).

Note: The size of the hardened drops was dependent on the composition of the diluted suspension, the flow rate of the pump and the vibration frequency of the nozzle. (a3) treating the hardened drops

Then the hardened drops were skimmed off and washed in water.

Subsequently, the washed and hardened drops were dried in a drying oven at 180 ° C for 40 min. After drying, free-flowing hardened drops were present Subsequently, the free-flowing hardened drops were heated in a preheated muffle open at 950 ° C for 30 minutes. After cooling, composite particles prepared according to the invention resulted in the bulk densities given in Tables 1a and 1b.

The composite particles produced in this way are excellent insulating materials, which are ideal as intermediates for the production of insulating products for the building materials industry.

As can be seen from the last line of Tables 1a and 1b, the measured bulk densities of the composite particles produced according to the invention are below 500 g / l. By a suitable choice of the phyllosilicates or clays, the non-refractory solids and the density-reducing substances, the bulk density of resulting composite particles according to the invention can even be reduced to below 350 g / L (see composite particle C19 in Table 1a).

Example 2: Determination of Alkalibeständiqkeit

The alkali resistance of composite particles prepared according to the invention in accordance with Example 1 and comparative materials of inorganic fillers or insulating materials of the prior art were determined in accordance with Method No. 7 above. The results of these determinations are listed in Table 2. Composite particles "C19" according to the invention (compare Table 1a) were used.

The following commercially available materials were used as reference materials: Liaver® blown glass sintered, bulk density 250 g / L, grain size 0.5-1.0 mm

Poraver® foam glass, bulk density 270 g / L, grain size 0.5 - 1, 0 mm

Aerosilex® foam glass (glass and silica), bulk density 125g / L, grain size 0.5-1, 0 mm

Table 2: Determination of the alkali resistance of composite particles according to the invention and comparative materials Sample mass loss [%]

Composite particles C19 according to the invention 6

Comparison material Liaver® 7

Comparative material Poraver® 10

Comparison material Aerosilex® 100

From the results in Table 2 it can be seen that the examined composite particles according to the invention showed the highest alkali resistance (the lowest mass loss) of all samples of inorganic fillers investigated.

Example 3: Determination of Water Absorption Capacity

Water absorption capacities of composite particles produced according to the invention in accordance with example 1 and comparative materials of inorganic fillers or insulating materials of the prior art according to determination method no. 3 given above were determined. The results of these determinations are listed in Table 3. Composite particles "C19" according to the invention (compare Table 1a) were used.

The comparative materials used were the commercial materials Liaver® expanded glass and Poraver® foam glass given above in Example 2.

Determination of the water absorption capacities of composite particles according to the invention and comparative materials

Sample water absorption [mL / g]

Composite particles 1, 5 according to the invention

C19

Comparison material Liaver® 1, 5

Comparative material Poraver® 1, 5 It can be seen from the results in Table 3 that the tested composite particles according to the invention exhibit a water absorption capacity which lies in the range of low water absorption capacity expandable and foam glasses.

Example 4 Determination of the Softening Temperatures The softening temperature of composite particles produced according to the invention according to Example 1 and comparative materials of inorganic fillers or insulating materials of the prior art according to determination method No. 9 given above were determined in each case. The results of these determinations are listed in Table 4. Compound particles "C19" according to the invention (compare Table 1a) were used, Comparative materials used were the commercially available materials Liaver® expanded glass and Poraver® foam glass given above in Example 2.

Determination of the softening temperature in the case of composite particles prepared according to the invention and comparison materials

It can be seen from the results in Table 4 that the composite particles tested in accordance with the invention have a significantly higher softening temperature than the investigated samples of comparison materials of inorganic fillers or insulating materials of the prior art. From this, it is possible to conclude that the composite particles produced according to the invention have a significantly better thermal resistance than the commercially available inorganic fillers or insulating materials investigated.

The results of the determination of softening temperatures are also shown graphically in FIGS. 2 to 7. For this purpose, the respective samples to be examined were ground to give powders and mixed with a little ethanol. By means of a pressing tool cubes were then pressed from the thus prepared samples, which as indicated above were examined by means of heating microscopy. The changes in the shape of the samples during the heating process were each photographically recorded.

The invention is summarized in the following aspects 1 to 31:

1. A process for producing an insulating product for the building materials industry or an insulating material as an intermediate for the production of such a product, comprising the following steps:

(a) Producing composite particles having a particle size of less than 10 mm, preferably less than 2 mm, determined by sieving, in a matrix encapsulation method comprising the following steps: (a1) producing droplets of a suspension of at least the following starting materials: as dispersed phases

(i) one or more substances selected from the group consisting of layered silicates and clays, (ii) additionally one or more density reducing substances selected from the group consisting of light fillers with a respective bulk density in the range from 10 to 350 g / L, blowing agent and pyrolyzable Fillers and (iii) in addition to components (i) and (ii) one or more non-refractory solids to reduce the melting point of the composite particles, and as a continuous phase

(iv) a solidifiable liquid,

(a2) solidifying the solidifiable liquid so that the drops harden to hardened drops and the (i) substance or substances selected from the group consisting of layered silicates and clays encapsulated in (ii) density reducing substance or substances and / or (iii) non-refractory solids in the solidifying continuous phase,

(a3) treating the hardened drops to result in said composite particles, wherein the treating comprises sintering the hardened drops.

2. A process according to aspect 1, wherein the one or more non-refractory solids used as additional starting material (iii) to reduce the melting point of the composite particles are inorganic materials selected from the group consisting of amorphous oxides, amorphous silicates, crystalline oxides and crystalline silicates and mixtures thereof, preferably selected from the group consisting of amorphous silicates and crystalline silicates, and / or (preferably "and") have a melting point or softening temperature lower than 1350 ° C.

3. A process according to any one of the preceding aspects, wherein the one or more non-refractory solids used to reduce the melting point of the composite particles used as additional starting material (iii) are selected from the group consisting of glass flours, feldspar, boric acid and boron salts such as sodium tetraborate and sodium perborate wherein preferably one or at least one of the plurality of non-refractory solids for reducing the melting point of the composite particles is selected from the group consisting of glass flours and albite, more preferably selected from the group of glass flours with a brightness> 80, and / or is selected from the group of recycle glass flours.

4. The method according to one of the preceding aspects, wherein in step (a1) as a colorant for white color, in component (i) one or more substances selected from the group consisting of layered silicates and clays and / or in component (iii) one or more non-refractory solids for reducing the melting point of the composite particles, preferably glass flours and / or albite, and / or as an additional constituent one or more additional starting materials, preferably selected from the group of refractory solids, more preferably selected from the group consisting of titanium dioxide, cristobalite , Alumina can be used. 5. Method according to one of the preceding aspects, wherein in step (a1) the production of drops takes place by means of one or more nozzles, preferably vibration nozzles, and / or induces in step (a2) the solidification of the solidifiable liquid by cooling, drying or chemical reaction becomes.

6. The method according to any one of the preceding aspects, wherein the solidifiable liquid used in step (a1) is a solidifiable by chemical reaction liquid and in step (a2), the solidification of the solidified liquid is induced by chemical reaction. 7. A method according to any one of the preceding aspects, wherein the solidifiable liquid is a liquid which can be solidified by cation exchange reaction, preferably one solidifiable by reaction with calcium ions and / or barium ions and / or manganese ions, preferably by reaction with calcium ions Liquid is. 8. A method according to any one of the preceding aspects, wherein the solidifiable liquid is a calcium ion solidifiable liquid comprising one or more binders selected from the group consisting of alginate, PVA, chitosan and sulfoxyethyl cellulose, and / or an aqueous solution wherein the solidifiable liquid is preferably an aqueous alginate solution.

9. The method according to one of the preceding aspects, wherein the or at least one of the in step (a) as a density reducing substance of component (ii) light fillers used, preferably having a particle size smaller than 0.4 mm, more preferably smaller than 0.3 mm , very particularly preferably less than 0.2 mm, determined by sieving, selected from the group consisting of: inorganic hollow spheres, preferably borosilicate glass, organic hollow spheres, particles of porous and / or foamed material, rice husk ash, core-shell particles and calcined diatomaceous earth and / or wherein the or at least one of the blowing agent used as component (ii) in step (a) is selected from the group consisting of:

Carbonates, bicarbonates and oxalates Vegetable flours, preferably selected from the group consisting of coconut husk flour, walnut shell flour, grape seed flour, olive kernel flour, wheat flour, corn flour, wood flour, sunflower peel flour and cork flour,

Strength,

Potato dextrin, sugar,

Plant seeds, and

Rice husk ash, and / or wherein the or at least one of the pyrolyzable fillers used as component (ii) in step (a) is selected from the group consisting of:

Plastic beads and

Styrofoam balls.

10. The method according to one of the preceding aspects, wherein in step (a1) as an additional starting material for producing a further dispersed phase one or more refractory solids are used, preferably in a proportion of not more than 10 wt .-%, based on the total amount of solid constituents of the suspension prepared in step (a1), wherein preferably the or at least one of the additional refractory solids used in step (a1) is selected from the group consisting of: Oxides of one or more elements selected from the group consisting of Si, Al, Zr, Ti, Mg and Ca, and

Mixed oxides., Each comprising one or more elements selected from the group consisting of Si, Al, Zr, Ti, Mg and Ca, wherein preferably the proportion of the total amount of the components from this group is not more than 10 wt .-%, based on the Total amount of solid constituents of the suspension prepared in step (a1), wherein preferably the or at least one of the additional refractory solids used in step (a1) is selected from the group consisting of:

Alumina,

Zirconium oxide,

- titanium dioxide,

Silica,

- magnesium oxide,

- calcium oxide,

- calcium silicate,

- phyllosilicates, preferably mica,

- aluminum silicates and

Magnesium aluminum silicate, preferably cordierite, wherein preferably the proportion of the total amount of the components from this group is not more than 10 wt .-%, based on the total amount of solid constituents of the suspension prepared in step (a1).

1 1. The method according to one of the preceding aspects, wherein the or at least one of the substances used in step (a1) of the component (i) is selected from the group consisting of phyllosilicates and clays which do not melt incongruent below 1500 ° C and / or is selected from the group consisting of the layer silicates kaolinite, montmorillonite and lllit, and the clays kaolin and bentonite.

12. A method according to any one of the preceding aspects, wherein the treatment according to step (a3) is carried out so that the bulk density of the composite particles resulting in step (a3) is less than the bulk density of the cured droplets in the dried state and / or the said in step (a3) composite particles have a bulk density <500 g / L, preferably <400 g / L, more preferably <300 g / L.

13. Method according to one of the preceding aspects, wherein the composite particles resulting in step (a3) wholly or partly have a particle size <1.5 mm, preferably at least partially have a particle size in the range of 0.1 mm to 0.5 mm, more preferably at least partially have a particle size in the range of 0, 1 mm to 0.3 mm, determined by sieving. 14. Method according to one of the preceding aspects, wherein component (ii) comprises one or more blowing agents as a density-reducing substance and the treatment according to step (a3) is carried out in such a way that the blowing agent (s) blow and thereby form cavities in the resulting composite particle and / or one or more pyrolyzable fillers and the treatment according to step (a3) is carried out in such a way that the one or more pyrolyzable fillers pyrolyise and thereby form cavities in the resulting composite particle.

15. Method according to one of the preceding aspects, wherein component (i) in step (a1) comprises at least one clay, preferably containing kaolinite and / or lllit, and / or wherein the treatment according to step (a3) sintering at a temperature in the range from 900 to 980 ° C, wherein preferably a sintered composite comprising the components (i), (ii) and (iii) is formed.

16. Method according to one of the preceding aspects, wherein during sintering in step (a3) a temperature of 1000 ° C is not exceeded.

17. Method according to one of the preceding aspects, wherein in step (a3) the hardened drops are sintered to result in solid particles as an intermediate, and then the surface of these solid particles is sealed, preferably by means of an organic coating agent, so that said Composite particles result.

18. Method according to one of the preceding aspects, wherein the composite particles resulting in step (a3) are characterized by

(A) a whiteness WG> 65, preferably WG> 80, particularly preferably WG> 90, and / or (B) a thermal conductivity value at room temperature (20 ° C) YR <0.26 W / m ^* K, preferably <0.10 W / m ^* K, more preferably <0.07 W / m ^* K, and / or

(C) an alkali resistance, determined as weight loss when stored in sodium hydroxide solution at pH 14 for 30 days, of <9% by mass, preferably <8% by mass, particularly preferably <7% by mass, based on composite particles having a particle size in the range of 0.5-1, 0mm. and or

(D) a grain strength> 1, 5 N / mm 2, preferably> 2.0 N / mm 2, more preferably> 4.0 N / mm 2, determined according to DIN EN 13055-1: 2008-08, Appendix A (method 1; 2 ^* 30 sec shake with amplitude 0.5), with a grain size in the range of 0.25-0, 5mm, and / or

(E) a water absorption capacity, determined by the water absorption according to Enslin, of <2.5 mL / g, preferably <2.0 mL / g, more preferably <1, 7 mL / g and / or

(F) a water solubility, determined as weight loss during storage in distilled water for 30 days, of <2% by mass, preferably <1% by mass, more preferably <0.2% by mass, based on composite particles having a particle size in the range from 0.5 to 1, 0mm, and / or

(G) a softening temperature> 900 ° C, preferably> 1000 ° C, more preferably> 1200 ° C, determined by means of heating microscopy.

19. Use of a matrix encapsulation method, preferably using a nozzle, particularly preferably using a vibrating nozzle, for producing composite particles having a bulk density <500 g / L, preferably <400 g / L, particularly preferably <300 g / L, in which Preparation of an insulating product for the building materials industry or an insulating material as an intermediate for the production of such a product.

20. Use of composite particles producible by a matrix encapsulation process, as an intermediate for producing an insulating product for the building materials industry or as an ingredient of an insulating product for the building materials industry.

21. The use according to aspect 20, wherein the composite particles are sealed composite particles, each consisting of a composite particle producible by a matrix encapsulation method and an envelope of an organic coating agent surrounding and sealing the composite particle. 22. Use according to any one of aspects 19 to 21, wherein the intermediate product for producing an insulating product for the building materials industry or the insulating product for the building materials industry in or im

- indoor and outdoor wall and ceiling coverings,

- thick-layer plaster systems indoors and outdoors, - thin-layer systems

- and in

- Resin systems used for the building materials industry.

23. An insulating product for the building materials industry or insulating material for the manufacture of such a product, comprising a number of composite particles having a particle size of less than 10 mm, comprising

Sinter composite of particles of one or more non-refractory solids, embedded in the sintered composite particles of one or more substances selected from the group consisting of phyllosilicates and clays, wherein the insulating product for the building materials industry or the insulating material for producing such a product can be produced by a method according to one of the aspects 1 to 18 and / or the composite particles are characterized by

(D) a grain strength> 1, 5 N / mm 2, preferably> 2.0 N / mm 2, more preferably> 4.0 N / mm 2, determined according to DIN EN 13055-1: 2008-08, Appendix A (method 1; 2 ^* 30 sec shake with amplitude 0.5), with a grain size in the range of 0.25-0, 5mm, and

(E) a water absorption capacity, determined by the water absorption according to Enslin, of <2.5 mL / g, preferably <2.0 mL / g, more preferably <1.7 mL / g,

24. An insulating product for the building materials industry or insulating material for producing such a product, according to aspect 23, wherein the composite particles are further characterized by

(A) a whiteness WG> 65, preferably WG> 80, particularly preferably WG> 90.

25. An insulating product for the building materials industry or insulating material for producing such a product, according to aspect 23 or 24, wherein the composite particles are further characterized by (B) a thermal conductivity value at room temperature (20 ° C) YR <0.26 W / m ^* K , preferably <0.10 W / m ^* K, particularly preferably <0.07 W / m ^* K, and / or (C) an alkali resistance, determined as weight loss when stored in sodium hydroxide solution at pH 14 for 30 days, of <9% by mass, preferably <8% by mass, particularly preferably <7% by mass, based on composite particles having a particle size in the range of 0.5-1, 0mm. and or

(F) a water solubility, determined as weight loss during storage in distilled water for 30 days, of <2% by mass, preferably <1% by mass, more preferably <0.2% by mass, based on composite particles having a particle size in the range from 0.5-1.0mm, and / or

26. An insulating product for the building materials industry or insulating material for producing such a product, according to any one of aspects 23 to 25, wherein in the sintered composite of particles of one or more non-refractory solids of a non-refractory solid or at least one of the plurality of non-refractory Solids selected from the group consisting of amorphous oxides, amorphous silicates, crystalline oxides and crystalline silicates and mixtures thereof, preferably selected from the group consisting of amorphous silicates and crystalline silicates, and / or having a melting point or softening temperature lower is 1350 ° C.

27. An insulating product for the building materials industry or insulating material for producing such a product, according to one of the aspects 23 to 26, wherein in the sintered composite of particles of one or more non-refractory solids of a non-refractory solid or at least one of the plurality of non-refractory solids, is selected from the group consisting of glass flours, feldspar, boric acid and boron salts such as sodium tetraborate and sodium perborate, wherein preferably one non-refractory solid or at least one of the plurality of non-refractory solids is selected from the group consisting of glass flours and albite, more preferably is selected from the group of glass flours with a whiteness> 80, and / or is selected from the group of recycle glass flours. 28. An insulating product for the building materials industry or insulating material for producing such a product, according to any one of aspects 23 to 27, wherein the composite particles as colorants for white paint one or more substances selected from the group consisting of layered silicates and clays, as embedded in the sintering composite Particles and / or one or more non-refractory solids, preferably albite, as a constituent of the sintered composite, and / or as an additional constituent one or more additional starting materials, preferably selected from the group of refractory solids, more preferably selected from the group of titanium dioxide, cristobalite and alumina.

29. Insulating product for the building materials industry or insulating material for producing such a product, according to any of aspects 23 to 28, comprising as hollow fillers in the sintered composite embedded organic hollow spheres with a particle size of less than 0.4 mm, more preferably less than 0.3 mm, most preferably less than 0.2 mm, determined by sieving.

30. An insulating product for the building materials industry or insulating material for producing such a product, according to any of aspects 23 to 29, comprising particles of one or more substances selected from the group consisting of layered silicates and clays not lower than 1500 ° C embedded in the sintering composite congruently melt and / or are selected from the group consisting of the layer silicates kaolinite, montmorillonite and lllit, and the clays kaolin and bentonite.

31. An insulating product for the building materials industry or insulating material for producing such a product, according to any of aspects 23 to 30, comprising a number of composite particles having a particle size <1, 5mm, preferably a particle size in the range of 0, 1 mm to 0.5 mm, more preferably a particle size in the range of 0, 1 mm to 0.3 mm, determined by sieving.

Claims

Claims:

A process for producing an insulating product for the building materials industry or an insulating material as an intermediate product for producing such a product, comprising the steps of: (a) preparing composite particles having a particle size of less than 10 mm, determined by sieving, in a matrix encapsulation process with the following steps:

(a1) producing drops of a suspension of at least the following starting materials: as dispersed phases

(ii) additionally one or more density reducing substances selected from the group consisting of light fillers having a bulk density in the range of from 10 to 350 g / L, blowing agents and pyrolyzable fillers and

(iii) in addition to ingredients (i) and (ii), one or more non-refractory solids to reduce the melting point of the composite particles, and as a continuous phase

(iv) a solidifiable liquid,

(a2) solidifying the solidifiable liquid such that the drops harden to hardened droplets and the (i) substance or substances selected from the group consisting of phyllosilicates and clays, the (ii) density-reducing substance or substances and / or (iii) non-refractory solids are encapsulated in the solidifying continuous phase,

3) treating the hardened drops to result in said composite particles, wherein the treating comprises sintering the hardened drops.

2. A process according to claim 1, wherein the one or more non-refractory solids used as additional starting material (iii) to reduce the melting point of the composite particles are inorganic materials selected from the group consisting of amorphous oxides, amorphous silicates, crystalline oxides and crystalline silicates and mixtures thereof, preferably selected from the group consisting of amorphous silicates and crystalline silicates, and / or having a melting point or softening temperature lower than 1350 ° C, and / or selected from the group consisting from glass flours, feldspar, boric acid and boron salts, preferably sodium tetraborate and sodium perborate, wherein preferably one or at least one of the plurality of non-refractory solids for reducing the melting point of the composite particles is selected from the group consisting of glass flours and albite, particularly preferably selected is keeps from the group of glass flours with a whiteness> 80, and / or is selected from the group of recycle glass flours.

A process according to any one of the preceding claims, wherein the one or more non-refractory solids used as additional starting material (iii) to reduce the melting point of the composite particles are inorganic materials selected from the group consisting of amorphous oxides, amorphous silicates, crystalline oxides and crystalline silicates and mixtures thereof, preferably selected from the group consisting of amorphous silicates and crystalline silicates, and having a melting point or softening temperature lower than 1350 ° C, and / or selected from the group consisting from glass flours, feldspar, boric acid and boron salts, preferably sodium tetraborate and sodium perborate, wherein preferably the one or at least one of the plurality of non-refractory solids for reducing the melting point of the composite particles is selected from the group consisting of glass flours and albite, especially is preferably selected from the group of glass flours with a brightness> 80, and / or is selected from the group of recycle glass flours.

4. The method according to any one of the preceding claims, comprising as an additional step:

(b) preparing the insulating product for the building materials industry or the insulating material as an intermediate for producing such a product using the composite particles of step (a).

A method according to any one of the preceding claims, preferably according to claim 4, wherein the manufactured insulating product for the building material industry or the insulating material produced is selected as an intermediate for the production of such a product from the group consisting of:

Plaster systems, preferably thick-layer plaster systems, indoors and outdoors, preferably renovation plasters, plaster and dry mortar systems, tile adhesives, construction adhesives, leveling compounds, fillers, sealants, fillers, wall fillers and / or clay plasters; thin-layer systems, preferably emulsion paints and / or wallpapers and

Resin systems for the building materials industry, preferably polymer concrete and / or mineral aggregate, artificial stones, composite bricks and / or sanitary precast elements.

Method according to one of the preceding claims, in step (a1) as colorant for white color, in component (i) one or more substances selected from the group consisting of layered silicates and clays and / or in component (iii) one or more non-refractory solids for reducing the melting point of the composite particles, preferably glass powders and / or albite, and / or as an additional constituent one or more additional starting materials, preferably selected from the group of refractory solids, more preferably selected from the group consisting of titanium dioxide, cristobalite, alumina are used and / or wherein in step (a1) the production of drops by means of one or more Nozzles, preferably vibration nozzles, and / or wherein in step (a2) the solidification of the solidifiable liquid is induced by cooling, drying or chemical reaction, and / or wherein the solidifiable liquid used in step (a1) is a liquid which can be solidified by chemical reaction and in step (a2) the Verf the solidifiable liquid is induced by chemical reaction, and / or is a liquid which can be solidified by cation exchange reaction, is preferably a liquid which can be solidified by reaction with calcium ions and / or barium ions and / or manganese ions, preferably by reaction with calcium ions, and / or is a liquid which can be solidified by reaction with calcium ions comprising one or more binders selected from the group consisting of alginate, PVA, chitosan and sulfoxyethyl cellulose, and / or an aqueous solution, wherein the solidifiable liquid is preferably an aqueous alginate solution.

7. The method according to any one of the preceding claims, wherein the or at least one in step (a) as a density reducing substance of component (ii) light filler used, preferably with a particle size smaller than 0.4 mm, more preferably smaller than 0.3 mm , very particularly preferably less than 0.2 mm, determined by sieving, selected from the group consisting of: inorganic hollow spheres, preferably borosilicate glass, organic hollow spheres, particles of porous and / or foamed material, rice husk ash, core-shell particles and calcined diatomaceous earth and / or wherein the or at least one of the blowing agent used as component (ii) in step (a) is selected from the group consisting of:

Starch, - potato dextrin,

Sugar,

Plant seeds, and

Plastic beads and - Styrofoam balls.

8. The method according to any one of the preceding claims, wherein in step (a1) as an additional starting material for producing a further dispersed phase one or more refractory solids are used, preferably in a proportion of not more than 10 wt .-%, based on the total amount of solid components of the suspension prepared in step (a1), wherein preferably the or at least one of the additional refractory solids used in step (a1) is selected from the group consisting of:

Oxides of one or more elements selected from the group consisting of Si, Al, Zr, Ti, Mg and Ca, and

Mixed oxides, each comprising one or more elements selected from the group consisting of Si, Al, Zr, Ti, Mg and Ca, wherein preferably the proportion of the total amount of the components from this group is not more than 10 wt .-%, based on the total amount the solid constituents of the suspension prepared in step (a1), wherein preferably the or at least one of the refractory solids additionally used in step (a1) is selected from the group consisting of:

Alumina,

Zirconium oxide,

- titanium dioxide,

Silica,

- magnesium oxide,

- calcium oxide,

- calcium silicate,

- phyllosilicates, preferably mica,

- aluminum silicates and

9. The method according to any one of the preceding claims, wherein the or at least one used in step (a1) as a substance of component (i) is selected from the group consisting of layered silicates and clays which do not melt incongruently below 1500 ° C and / / or is selected from the group consisting of the layered silicates kaolinite, montmorillonite and lllit, and the clays kaolin and bentonite and / or wherein the treatment according to step (a3) is carried out in such a way that the bulk density of the composite particles resulting in step (a3) is lower as the bulk density of the hardened drops in the dried state and / or wherein said composite particles resulting in step (a3) have a bulk density <500 g / L, preferably <400 g / L, more preferably <300 g / L. and / or wherein the composite particles resulting in step (a3) wholly or partially have a grain size <1, 5mm, preferably at least partially a grain size in the range of 0, 1 mm to 0.5 mm, more preferably at least partially a grain size in Range from 0, 1 mm to 0.3 mm, determined by sieving.

10. The method according to any one of the preceding claims, wherein component (ii) as density-reducing substance or substances comprises one or more blowing agents and the treatment according to step (a3) is performed so that the or the plurality of blowing agents and thus form cavities in the resulting composite particles and / or one or more pyrolyzable fillers and the treatment according to step (a3) is carried out in such a way that the one or more pyrolyzable fillers pyrolyise and thereby form cavities in the resulting composite particle. and / or wherein component (i) in step (a1) comprises at least one clay, preferably containing kaolinite and / or lllit, and / or wherein the treatment according to step (a3) sintering at a temperature in the range of 900 to 980 ° C, wherein preferably a sintered composite comprising the components (i), (ii) and (iii) is formed, and / or. wherein during sintering in step (a3) a temperature of 1000 ° C is not exceeded, and / or wherein in step (a3) the hardened droplets are sintered to result in solid particles as an intermediate, and then the surface of said solid particles is sealed is, preferably by means of an organic coating agent, so that said composite particles result.

11. The method according to any one of the preceding claims, wherein in step (a3) resulting composite particles are characterized by (A) a whiteness WG> 65, preferably WG> 80, more preferably WG> 90, and / or

(B) a thermal conductivity value at room temperature (20 ° C.) YR <0.26 W / m ^* K, preferably <0.10 W / m ^* K, particularly preferably <0.07 W / m ^* K, and / or ( C) an alkali resistance, determined as weight loss at 30 days storage in sodium hydroxide solution at pH 14, of <9% by mass, preferably <8% by mass, particularly preferably <7% by mass, based on composite particles having a particle size in Range of 0.5-1, 0mm. and / or (D) a grain strength> 1.5 N / mm 2, preferably> 2.0 N / mm 2, particularly preferably> 4.0 N / mm 2, determined according to DIN EN 13055-1: 2008-08, Annex A ( Method 1, 2 ^* 30 sec shake with amplitude 0.5), with a grain size in the range of 0.25-0, 5mm, and / or (E) a water absorption capacity, determined by the water absorption according to Enslin, of <2.5 mL / g, preferably <2.0 mL / g, more preferably <1, 7 mL / g and / or

12. Use of a matrix encapsulation method, preferably using a nozzle, particularly preferably using a vibrating nozzle, for producing composite particles having a bulk density <500 g / L, preferably <400 g / L, particularly preferably <300 g / L, in which Production of an insulating product for the building materials industry or an insulating material as an intermediate for the production of such a product.

13. Use according to claim 12, wherein the insulating product for the building materials industry or the insulating material as an intermediate for the production of such a product is selected from the group consisting of:

Plaster systems, preferably thick-layer plaster systems, indoors and outdoors, preferably renovation plasters, plaster and dry mortar systems, tile adhesives, Building adhesives, leveling compounds, fillers, sealants, fillers, wall fillers and / or clay plasters; Thin-layer systems, preferably emulsion paints and / or wallpapers and resin systems for the building materials industry, preferably polymer concrete and / or mineral cast, artificial stones, composite bricks and / or sanitary precast elements

Use of composite particles producible by a matrix encapsulation process, as an intermediate for producing an insulating product for the building materials industry or as a constituent of an insulating product for the building materials industry, wherein preferably the composite particles are sealed composite particles each consisting of a composite particle producible by a matrix encapsulation process and one of the composite particles surrounding and sealing shell of an organic coating agent and / or wherein the intermediate product for producing an insulating product for the building materials industry or the insulating product for the building materials industry in or im

- indoor and outdoor wall and ceiling coverings,

- plaster systems, preferably thick-layer plaster systems, indoors and outdoors,

- Thin-layer systems, preferably in emulsion paints and / or wallpaper

- and in

- Resin systems for the building materials industry is used.

15. An insulating product for the building materials industry or insulating material for making such a product, comprising a number of composite particles having a grain size of less than 10 mm, comprising

Sinter composite of particles of one or more non-refractory solids embedded in the sintered composite particles of one or more substances selected from the group consisting of phyllosilicates and clays, wherein the insulating product for the building materials industry or the insulating material for producing such a product can be produced by a Method according to one of claims 1 to 1 1 and / or the composite particles are characterized by

(D) a grain strength> 1, 5 N / mm ² , preferably> 2.0 N / mm ² , more preferably> 4.0 N / mm ² , determined according to DIN EN 13055-1: 2008-08, Annex A ( Method 1, 2 ^* 30 sec shake with amplitude 0.5), with a grain size in the range of 0.25-0.5 mm, and

16. An insulating product for the building materials industry or insulating material for the production of such a product, according to claim 15, wherein the composite particles are also characterized by

(A) a whiteness WG> 65, preferably WG> 80, particularly preferably WG> 90. and / or

(B) a thermal conductivity value at room temperature (20 ° C.) YR <0.26 W / m * K, preferably <0.10 W / m * K, particularly preferably <0.07 W / m * K, and / or

(C) an alkali resistance, determined as weight loss when stored in sodium hydroxide solution at pH 14 for 30 days, of <9% by mass, preferably <8% by mass, particularly preferably <7% by mass, based on composite particles having a particle size in the range of 0.5-1, 0 mm. and or

(F) a water solubility, determined as weight loss during storage in distilled water for 30 days, of <2% by mass, preferably <1% by mass, more preferably <0.2% by mass, based on composite particles having a particle size in the range from 0.5-1.0 mm, and / or

(G) a softening point> 900 ° C, preferably> 1000 ° C, more preferably> 1200 ° C, determined by means of heating microscopy.

17. An insulating product for the building materials industry or insulating material for producing such a product according to any one of claims 15 to 16, wherein in the sintered composite of particles of one or more non-refractory solids of a non-refractory solid or at least one of the plurality of non-refractory solids, is selected from the group consisting of amorphous oxides, amorphous silicates, crystalline oxides and crystalline silicates and mixtures thereof, preferably selected from the group consisting of amorphous silicates and crystalline silicates, and / or has a melting point or a softening temperature, or lower is selected as 1350 ° C and / or selected from the group consisting of glass flours, feldspar, boric acid and boron salts such as sodium tetraborate and sodium perborate, wherein preferably one non-refractory solid or at least one of the plurality of non-refractory solids is selected from the group consisting of glass flours and albite, more preferably selected from the group of glass flours with a brightness> 80, and / or is selected from the group of recycle glass flours.

18. An insulating product for the building materials industry or insulating material for producing such a product, according to any one of claims 15 to 17, wherein in the sintered composite of particles of one or more non-refractory solids of a non-refractory solid or at least one of the plurality not - refractory solids, is selected from the group consisting of amorphous oxides, amorphous silicates, crystalline oxides and crystalline silicates and mixtures thereof, preferably selected from the group consisting of amorphous silicates and crystalline silicates and having a melting point or softening temperature lower than 1350 ° C and / or selected from the group consisting of glass flours, feldspar, boric acid and boron salts such as sodium tetraborate and sodium perborate, wherein preferably one non-refractory solid or at least one of the plurality of non-refractory solids is selected from the group consisting of glass flours and albite, more preferably selected from the group of glass flours with a brightness> 80, and / or selected from the group of recycle glass flours.

19. An insulating product for the building material industry or insulating material for producing such a product, according to any one of claims 15 to 18, wherein the composite particles as colorants for white paint one or more substances selected from the group consisting of phyllosilicates and clays, than in the Sintered composite embedded particles and / or one or more non-refractory solids, preferably glass flours and / or Al-bit, as a constituent of the sintered composite, and / or as an additional constituent one or more additional starting materials, preferably selected from the group of refractory solids, more preferably selected from the group of titanium dioxide, cristobalite and alumina.

20. An insulating product for the building materials industry or insulating material for producing such a product, according to any one of claims 15 to 19, comprising as lightweight fillers in the sintered composite embedded organic hollow spheres with a particle size less than 0.4 mm, more preferably less than 0.3 mm , most preferably less than 0.2 mm, determined by sieving. and / or comprising embedded in the sintered composite particles of one or more substances selected from the group consisting of layered silicates and clays which do not melt congruently below 1500 ° C and / or are selected from the group consisting of the layered silicates kaolinite, montmorillonite and lllit, and the clays kaolin and bentonite. and / or comprising a number of composite particles having a particle size <1.5 mm, preferably a particle size in the range from 0.1 mm to 0.5 mm, particularly preferably a particle size in the range from 0.1 mm to 0.3 mm, determined by sieving.