DE102008043988A1 - Fiber containing mortar composition - Google Patents

Abstract

The invention relates to dry mortar compositions comprising a) one or more hydraulic binders, b) one or more fillers, c) optionally further additives, characterized in that d) fibers and e) one or more water-redispersible polymer powders based on polymers of ethylenically unsaturated monomers having a glass transition temperature Tg of -25 ° C to + 25 ° C, are included.

Description

The The invention relates to a fibrous dry mortar composition for the construction of reinforcement fabric-free thermal insulation composite systems using such compositions.

To the Construction of a thermal insulation composite system (ETICS) Insulation boards (rigid foam boards or rock wool boards) with an adhesive mortar attached to the masonry, then a reinforcing layer is applied to the insulation boards, in which a fiber fabric (usually glass fiber fabric) is inserted, and the composite system finally covered with a finishing plaster.

The following embodiments are known from the prior art: In the DE 2516916 A1 describes a process for the production of insulated plaster facades using mortar compositions containing a plastic additive in the form of an aqueous polymer dispersion. The mortar compositions still contain fiber materials and are used to apply the reinforcing layer, in which a glass silk fabric is embedded. The DE 2703342 A1 is concerned with the task of creating a mortar for the coating of thermal insulation boards, in which a embedded fiberglass grid is reliably protected against moisture. The object is achieved in that the mortar contains a polymer in addition to a hydraulic binder, with a protective colloid, which loses its surface-active effect when exposed to Ca ²⁺ ions. Polyvinyl alcohol-stabilized vinyl ester polymers in the form of their aqueous dispersions or dispersion powders are used for this purpose. Compositions for producing reinforcement fabric-free coatings are not described. In the DE 4216204 A1 is recommended for thermal insulation of buildings to provide them with a mineral insulation board with plaster layer, between the thermal insulation board and plaster layer a reinforcing mesh is embedded. If desired, the plaster layer may also contain fiber materials and / or plastic dispersion powder as adhesion-promoting agent.

The Applying the reinforcing layer on the thermal insulation board in principle requires two operations. At the first step the reinforcing compound is applied to the thermal insulation board applied, the second the reinforcing fabric in the reinforcing material embedded and then the Armierungsmasse smooth painted. The introduction of the reinforcing fabric in the applied Reinforcing compound represents a step in addition not only working time, but also material (reinforcing mesh) costs. Easier to process and less labor intensive it if a reinforcing fabric-free reinforcing compound after curing would have the same characteristics as a conventional one Reinforcing layer consisting of reinforcing compound and additionally incorporated reinforcement fabric.

The following embodiments of thermal insulation composite systems without reinforcing layer are known from the prior art: DE 10248098 A1 describes a thermal insulation composite system, which consists only more of the thermal barrier coating and a reinforced with glass fiber plaster layer, waiving a mortar layer with fabric insert. The composition of the plaster layer is not described. For thermal insulation of building walls is in the DE 3429251 C2 for coating the thermal barrier coating, a synthetic resin coating is used, which contains crosslinkable polymers in the form of their synthetic resin dispersions or solutions and optionally also a supplement of organic and inorganic fibers. On the insertion of a reinforcing fabric in the coating is omitted. The use of pre-crosslinked or crosslinkable polymers leads to brittle brushing with the risk of cracking. For the production of a thermal insulation composite system without mounting a reinforcing fabric is in the DE 10 2004 048 584 B4 It is recommended to use a composition as reinforcing plaster that contains carbon fiber in addition to organic and inorganic binders. The DE 19839295 C5 relates to a thermal insulation composite system, which consists of lightweight mineral insulation panels, which are coated with a light plaster and glued along the joints with the light plaster. The light plaster contains polymer dispersion and cotton fibers. On the application of a reinforcing fabric is omitted. An Armierungsgewebefreie insulation coating is also the subject of DE 4032769 C2 , In this case, a Mineralfaserdämmplatte is provided with a reinforcement fabric-free coating containing as binder plastic dispersion or resin solution, and optionally still filled with mineral fillers and / or fibers and / or pigments. From the DE 3040077 C2 is a Verputztrockenmörtel known for coating insulation boards, wherein the insertion of a glass fiber fabric is omitted in the plaster coating. The plaster coating contains alkali-resistant glass fibers and also polymeric compounds such as polyvinyl acetate, polyvinyl alcohol and / or starch or protein derivatives. These polymers are non-redispersible resins with high Tg, well above 25 ° C. Such polymers lead to hard and brittle Armierungsmassen with the risk of cracking, especially at low temperatures or impact load. Dry mortar with a combination of fiber and water-redispersible polymer powder are not described.

object The invention contains dry mortar compositions a) one or more hydraulic binders, b) one or more Fillers, c) optionally further additives, characterized characterized in that d) fibers and e) one or more in water redispersible polymer powders based on polymers of ethylenic unsaturated monomers having a glass transition temperature Tg from -25 ° C to + 25 ° C, are included.

suitable Hydraulic binders a) are, for example, cements, in particular Portland cement, aluminate cement, trass cement, metallurgical cement, Magnesia cement, phosphate cement or blastfurnace cement, as well as mixed cements, Filling cements, fly ash, microsilica, hydraulic lime and plaster. Portland cement, aluminate cement and metallurgical cement are preferred, as well as blends, fillers, hydraulic lime and gypsum. Generally, the dry mortar compositions contain From 5 to 50% by weight, preferably from 10 to 30% by weight, of hydraulic binders, each based on the total weight of the dry mortar composition.

Examples suitable fillers b) are quartz sand, quartz powder, Calcium carbonate, dolomite, aluminum silicates, clay, chalk, hydrated lime, Talc or mica, or even lightweight fillers such as pumice, Foam glass, aerated concrete, perlite, vermiculite, carbon nanotubes (CNT). It can also be any mixtures of said fillers be used. Preference is given to quartz sand, quartz flour, calcium carbonate, Chalk or hydrated lime. In general, the included Dry mortar compositions 30 to 90% by weight, preferably 40 to 80 wt .-%, fillers, each based on the total weight the dry mortar composition.

Other usual Additives c) for dry mortar compositions are thickeners, for example polysaccharides such as cellulose ethers and modified cellulose ethers, starch ethers, guar gum, Xanthan gum, phyllosilicates, polycarboxylic acids such as polyacrylic acid and their partial esters, as well as polyvinyl alcohols which optionally acetalated or hydrophobically modified, casein and associative thickeners. Usual additives are also retarders, such as hydroxycarboxylic acids, or dicarboxylic acids or their salts, saccharides, oxalic acid, Succinic acid, tartaric acid, gluconic acid, Citric acid, sucrose, glucose, fructose, sorbitol, pentaerythritol. A common additive are setting accelerators, for example Alkali or alkaline earth salts of inorganic or organic acids. In addition, mention should also be made of water repellents, Preservatives, film-forming aids, dispersants, foam stabilizers, Defoamer and flame retardant (eg aluminum hydroxide).

The Additives c) are added in the usual depending on the type of additive, used. In general, the amounts are 0.1 to 10 wt .-%, respectively based on the total weight of the dry mortar composition.

When Fiber component d) are natural and synthetic Fiber materials, both organic and inorganic Materials, as well as mixtures thereof. Examples of natural, organic fibers are cotton, hemp, jute, flax, wood fibers, Cellulose, viscose, leather fibers or sisal. examples for synthetic organic fibers are viscose fibers, polyamide fibers, Polyester fibers, polyacrylonitrile fibers, dralon fibers, polyethylene fibers, Polypropylene fibers, polyvinyl alcohol fibers or aramid fibers. The inorganic fibers can be, for example, glass fibers, Carbon fibers, mineral wool fibers or metal fibers. Prefers are cotton fibers, polyacrylonitrile fibers and cellulose fibers.

The used fibers typically have a length between 0.1 microns and 16 mm, preferably from 10 microns to 5 mm. But it can also be shorter or longer be used. Particular preference is given to fibers in a length range used from 10 microns to 1 mm. The fibers are considered loose Fibers and not used in the form of a fabric. In general the dry mortar compositions contain 0.1 to 5 Wt .-%, preferably 0.5 to 2 wt .-%, fibers, each based on the total weight of the dry mortar composition.

As water-redispersible polymer powder e) refers to powder compositions which are accessible by drying the corresponding aqueous dispersions of the base polymers in the presence of protective colloids. Due to this manufacturing process, the finely divided resin of the dispersion is coated with a water-soluble protective colloid of sufficient amount. During drying, the protective colloid acts like a shell, which prevents the particles from sticking together. When redispersing in water, the protective colloid dissolves again in water and an aqueous dispersion of the original polymer particles is present ( Schulze J. in TIZ, No. 9, 1985 ).

suitable Polymers of ethylenically unsaturated monomers are those based on one or more monomers from the group comprising vinyl esters, (meth) acrylic esters, vinyl aromatics, olefins, 1,3-dienes and vinyl halides and optionally further therewith copolymerizable monomers. The polymers are preferably not networked.

Suitable vinyl esters are those of carboxylic acids having 1 to 15 carbon atoms. Preference is given to vinyl acetate, vinyl propionate, vinyl butyrate, vinyl 2-ethylhexanoate, vinyl laurate, 1-methylvinyl acetate, vinyl pivalate and vinyl esters of α-branched monocarboxylic acids having 9 to 11 C atoms, for example VeoVa9 ^R or VeoVa10 ^R (trade name of the company Resolution). Particularly preferred is vinyl acetate.

suitable Monomers from the group of acrylic acid esters or methacrylic acid esters are esters of unbranched or branched alcohols with 1 to 15 C atoms. Preferred methacrylic esters or acrylic esters are methyl acrylate, methyl methacrylate, ethyl acrylate, ethyl methacrylate, Propyl acrylate, propyl methacrylate, n-butyl acrylate, n-butyl methacrylate, t-butyl acrylate, t-butyl methacrylate, 2-ethylhexyl acrylate. Especially preferred are methyl acrylate, methyl methacrylate, n-butyl acrylate, t-butyl acrylate and 2-ethylhexyl acrylate.

When Vinylaromatics preferred are styrene, methylstyrene and vinyltoluene. Preferred vinyl halide is vinyl chloride. The preferred olefins are ethylene, propylene and the preferred dienes are 1,3-butadiene and isoprene.

Possibly can still 0.1 to 5 wt .-%, based on the total weight of the monomer mixture, auxiliary monomers are copolymerized. Prefers 0.5 to 2.5 wt .-% auxiliary monomers are used. examples for Auxiliary monomers are ethylenically unsaturated mono- and dicarboxylic acids, preferably acrylic acid, methacrylic acid, fumaric acid and maleic acid; ethylenically unsaturated carboxylic acid amides and -nitriles, preferably acrylamide and acrylonitrile; Mono- and Diesters of fumaric and maleic acid, such as diethyl, and diisopropyl ester and maleic anhydride; ethylenically unsaturated sulfonic acids or their salts, preferably Vinylsulfonic acid, 2-acrylamido-2-methylpropanesulfonic acid. Further examples are precrosslinking comonomers such as multiply ethylenic unsaturated comonomers, for example diallyl phthalate, Divinyl adipate, diallyl maleate, allyl methacrylate or triallyl cyanurate, or post-crosslinking comonomers, for example acrylamidoglycolic acid (AGA), methyl acrylamidoglycolic acid methyl ester (MAGME), N-methylolacrylamide (NMA), N-methylolmethacrylamide, N-methylolallylcarbamate, Alkyl ethers such as the isobutoxy ether or ester of N-methylolacrylamide, of N-methylolmethacrylamide and N-methylolallylcarbamate. Are suitable also epoxide-functional comonomers such as glycidyl methacrylate and glycidyl acrylate. Further examples are silicon-functional comonomers, such as acryloxypropyltri (alkoxy) - and methacryloxypropyltri (alkoxy) silanes, vinyltrialkoxysilanes and Vinylmethyldialkoxysilane, wherein as alkoxy groups, for example Ethoxy and Ethoxypropylenglykolether residues may be included. Mention may also be made of monomers having hydroxyl or CO groups, for example Methacrylsäure- and Acrylsäurehydroxyalkylester such as hydroxyethyl, hydroxypropyl or hydroxybutyl or methacrylate and compounds such as diacetoneacrylamide and acetylacetoxyethyl acrylate or methacrylate.

The monomer selection or the selection of the weight proportions of the comonomers is carried out so that a glass transition temperature Tg of -25 ° C to + 25 ° C, preferably -10 ° C to + 10 ° C, more preferably -10 ° C to 0 ° C. results. The glass transition temperature Tg of the polymers can be determined in a known manner by means of differential scanning calorimetry (DSC). The Tg can also be approximated by the Fox equation. To Fox TG, Bull. Physics Soc. 1, 3, Page 123 (1956) where: 1 / Tg = x1 / Tg1 + x2 / Tg2 + ... + xn / Tgn, where xn is the mass fraction (wt% / 100) of the monomer n, and Tgn is the glass transition temperature in Kelvin of the homopolymer of the monomer n is. Tg values for homopolymers are in Polymer Handbook 2nd Edition, J. Wiley & Sons, New York (1975) listed.

Preference is given to copolymers of vinyl acetate with 1 to 50 wt .-% of ethylene;
Copolymers of vinyl acetate with 1 to 50 wt .-% of ethylene and 1 to 50 wt .-% of one or more other comonomers from the group of vinyl esters having 1 to 12 carbon atoms in the carboxylic acid radical such as vinyl propionate, vinyl laurate, vinyl esters of alpha-branched carboxylic acids with 9 to 13 C atoms, such as VeoVa9, VeoVa10, VeoVa11;
Copolymers of vinyl acetate, 1 to 50 wt .-% of ethylene and preferably 1 to 60 wt .-% of (meth) acrylic acid esters of unbranched or branched alcohols having 1 to 15 carbon atoms, in particular n-butyl acrylate or 2-ethylhexyl acrylate; and
Copolymers with 30 to 75 wt .-% vinyl acetate, 1 to 30 wt .-% vinyl laurate or vinyl ester of an alpha-branched carboxylic acid having 9 to 11 carbon atoms, and 1 to 30 wt .-% of (meth) acrylic acid esters of unbranched or branched Alcohols having 1 to 15 carbon atoms, in particular n-butyl acrylate or 2-ethylhe xyl acrylate, which still contain 1 to 40 wt .-% ethylene;
Copolymers with vinyl acetate, 1 to 50% by weight of ethylene and 1 to 60% by weight of vinyl chloride; in which
the polymers may also contain the abovementioned auxiliary monomers in the stated amounts, and the data in% by weight add up to in each case 100% by weight.

Also preferred are (meth) acrylic acid ester polymers, such as copolymers of n-butyl acrylate or 2-ethylhexyl acrylate or copolymers of methyl methacrylate with n-butyl acrylate and / or 2-ethylhexyl acrylate;
Styrene-acrylic acid ester copolymers with one or more monomers from the group of methyl acrylate, ethyl acrylate, propyl acrylate, n-butyl acrylate, 2-ethylhexyl acrylate;
Vinyl acetate-acrylic acid ester copolymers with one or more monomers from the group of methyl acrylate, ethyl acrylate, propyl acrylate, n-butyl acrylate, 2-ethylhexyl acrylate and optionally ethylene;
Styrene-1,3-butadiene copolymers;
wherein the polymers can still contain the said auxiliary monomers in the stated amounts, and the data in wt .-% add up to each 100 wt .-%.

Most preferred are water-redispersible polymer powders e) comprising copolymers with vinyl acetate and from 5 to 50% by weight of ethylene, or
Copolymers with vinyl acetate, 1 to 50 wt .-% of ethylene and 1 to 50 wt .-% of a vinyl ester of α-branched monocarboxylic acids having 9 to 11 carbon atoms, or
Copolymers with 30 to 75 wt .-% vinyl acetate, 1 to 30 wt .-% vinyl laurate or vinyl ester of an alpha-branched carboxylic acid having 9 to 11 carbon atoms, and 1 to 30 wt .-% of (meth) acrylic acid esters of unbranched or branched Alcohols having 1 to 15 carbon atoms, which still contain 1 to 40 wt .-% of ethylene, or
Copolymers with vinyl acetate, 5 to 50 wt .-% of ethylene and 1 to 60 wt .-% of vinyl chloride.

The The polymers are prepared by the emulsion polymerization process or after the suspension polymerization process in the presence of Protective colloids, preferably after the emulsion polymerization process, the polymerization temperature being generally 20 ° C to 100 ° C, preferably 60 ° C to 90 ° C. is, and in the copolymerization of gaseous Comonomers such as ethylene also under pressure, generally between 5 bar and 100 bar, can be worked. The initiation of the polymerization takes place with those for the emulsion or suspension polymerization customary water-soluble or monomer-soluble Initiators or redox initiator combinations. examples for water-soluble initiators are sodium persulfate, hydrogen peroxide, Azobisisobutyronitrile. Examples of monomer-soluble Initiators are dicetyl peroxydicarbonate, dicyclohexyl peroxydicarbonate, Dibenzoyl. The mentioned initiators are in general in an amount of 0.01 to 0.5 wt .-%, based on the total weight the monomers used. Combinations are used as redox initiators from the mentioned initiators in combination with reducing agents. Suitable reducing agents are, for example, sodium sulfite, sodium hydroxymethanesulfinate and ascorbic acid. The amount of reducing agent is preferably 0.01 to 0.5 wt .-%, based on the total weight the monomers.

to Control of the molecular weight can during the polymerization regulating substances are used. If Regulators are used, these are usually in Amounts between 0.01 to 5.0 wt .-%, based on the polymerized Monomers, used and separately or also premixed with reaction components dosed. Examples of such substances are n-dodecyl mercaptan, tert-dodecyl mercaptan, Mercaptopropionic acid, methyl mercaptopropionate, Isopropanol and acetaldehyde. Preferably, none will be regulatory Used substances.

To stabilize the polymerization batch, protective colloids are used, if appropriate in combination with emulsifiers. Suitable protective colloids are partially hydrolyzed or fully hydrolyzed polyvinyl alcohols; polyvinylpyrrolidones; polyvinyl; Polysaccharides in water-soluble form such as starches (amylose and amylopectin) or dextrins or cyclodextrins, celluloses and their carboxymethyl, methyl, hydroxyethyl, hydroxypropyl derivatives; Proteins such as casein or caseinate, soy protein, gelatin; lignin; synthetic polymers such as poly (meth) acrylic acid, copolymers of (meth) acrylates with carboxyl-functional comonomer units, poly (meth) acrylamide, polyvinylsulfonic acids and their water-soluble copolymers; Melamine formaldehyde sulfonates, naphthalene formaldehyde sulfonates, styrene maleic acid and vinyl ether maleic acid copolymers; cationic protective colloids, for example polymers with monomer units with quaternary ammonium groups. Preference is given to partially hydrolyzed or fully hydrolyzed polyvinyl alcohols. Particularly preferred are partially hydrolyzed polyvinyl alcohols having a degree of hydrolysis of 80 to 95 mol% and a Höppler viscosity in 4% aqueous solution of 1 to 30 mPas (Höppler method at 20 ° C, DIN 53015 ).

To Completion of the polymerization can for residual monomer removal be postpolymerized using known methods, for example by postpolymerization initiated with redox catalyst. fugitive Residual monomers can also by distillation, preferably under reduced pressure, and optionally by passing or passing from inert trapped gases such as air, nitrogen or water vapor become. The aqueous dispersions obtainable therewith have a solids content of 30 to 75 wt .-%, preferably from 50 to 60 wt .-%.

to Preparation of water-redispersible polymer powder the dispersions, optionally after the addition of further protective colloids as a drying aid, dried, for example by means of fluidized bed drying, Freeze drying or spray drying. Preferably the dispersions spray-dried. The spray drying takes place in conventional spray drying systems, wherein the atomization by means of one-, two- or multi-fluid nozzles or can be done with a rotating disk. The exit temperature is generally in the range of 45 ° C to 120 ° C, preferably 60 ° C to 90 ° C, depending on the system, Tg des Resin and desired degree of drying, selected. The viscosity of the food to be cooked is over the solids content adjusted so that a value of <500 mPas (Brookfield viscosity at 20 revolutions and 23 ° C), preferably <250 mPas becomes. The solids content of the dispersion to be atomized is> 35%, preferably> 40%.

In Usually, the drying aid will be in a total of 0.5 up to 30% by weight, based on the polymeric constituents of the dispersion, used. That is the total amount of protective colloid Before the drying process should be at least 1 to 30 wt .-%, based on the polymer content amount; 5 to 20% by weight are preferred used based on the polymer content.

Suitable drying aids are known to the person skilled in the art and are, for example, the abovementioned protective colloids. Particularly preferred are partially hydrolyzed polyvinyl alcohols having a degree of hydrolysis of 80 to 95 mol% and a Höppler viscosity in 4% aqueous solution of 1 to 30 mPas (Höppler method at 20 ° C, DIN 53015 ).

at The atomization often has a content of up to 1.5 Wt .-% antifoam, based on the base polymer, as favorable proved. To increase the shelf life by Improvement of the blocking stability, especially in Powders with low glass transition temperature, the obtained powder with an anti-blocking agent (anti-caking agent), preferably 1 to 30% by weight, based on the total weight of polymeric constituents, be equipped. Examples of antiblocking agents are Ca or Mg carbonate, talc, gypsum, silicic acid, kaolins such as metakaolin, silicates with particle sizes preferably in the range of 10 nm to 10 μm.

The Preparation of the dry mortar composition takes place in General so that the components a) to e) in conventional Powder mixing devices mixed into a dry mortar and homogenized. The for processing to mortar compounds Required amount of water is added before preparation. It can also be done so that the individual components a) to e) separately mixed with water to a mortar composition become. For the preparation of the reinforcing layer of the reinforcing mortar obtained therewith then applied to the insulation boards.

The dry mortar compositions obtainable therewith are suitable for the production of reinforcing materials for thermal insulation composite systems, which contain no fabric insert. Other applications are the for the production of adhesives and coating agents. Examples for adhesives are adhesives for thermal insulation panels and soundproofing panels, tile adhesives, and adhesives for bonding of wood and wood-based materials.

Examples for coating compositions are mortars, leveling compounds, Screeds, plasters.

The following examples serve to further illustrate the invention:
In the (comparative) Examples 1 to 7, the following redispersible polymer powders were used:

Dispersion powder 1:

• Dispersion powder based on a vinyl acetate-ethylene copolymer with a Tg of -9 ° C with cationic protective colloid.

Dispersion powder 2:

• Dispersion powder based on a vinyl acetate-ethylene copolymer with a Tg of -7 ° C with polyvinyl alcohol protective colloid.

Dispersion powder 3:

• Dispersion powder based on a vinyl acetate-ethylene copolymer with a Tg of -7 ° C with polyvinyl alcohol protective colloid and silane.

to Production of mortar compounds for the (comparative) examples 1 to 7 were the ingredients listed in Table 1, in there listed amounts, each with those mentioned in Table 1 Parts by weight of water to the mortar mass.

The Properties of the mortar masses were re Stamina, smoothness and air entrainment are assessed and judged with the grades very good, good, satisfactory.

to Testing was the mortar compounds each as a reinforcing mortar in a layer thickness of 4 mm on EPS plates (expanded polystyrene) applied. In the case of Comparative Example 1, a glass silk fabric was used inserted in the reinforcing layer.

After hardening of the reinforcing layer, the adhesive tensile strength and the break-out on EPS plates were determined according to the test method DIN 18555-6 detected. The dent level on EPS was determined according to the test method ISO 7892 certainly. The results of the testing are summarized in Table 2.

The Results show that the invention fibrous mortar (Example 3 to 7) such as fiber-free Apply mortar compounds (Comparative Examples 1 and 2) to let. There is no deterioration in stamina, Smoothness and air pore formation detectable.

The Adhesion to the thermal insulation board is opposite fiber-free reinforcing mortar significantly improved - see Comparison of the adhesion values and EPS-Ausriss of Vbsp. 1/2 with examples 3 to 7.

It was surprising that the denting values for the reinforcing plaster according to the invention in part (Examples 5 to 7) are markedly better than the value for glass fiber-reinforced reinforcing plaster (Comparative Example 1). Table 1: recipe Vbsp.1 Vbsp.2 EX3 EX4 Bsp.5 Bsp.6 Bsp.7 Ingredients in parts by weight. Cement OPC CEM IIB-S32,5R 180 180 180 Cement OPC CEM I 52.5 280 280 50 50 hydrated lime 50 50 50 50 50 methylhydroxycellulose 1.5 1.5 1.5 1.5 2 2 2 Dispersion powder 1 25 25 70 90 90 Dispersion powder 2 90 Dispersion powder 3 90 aluminum hydroxide 50 50 93.4 93.4 93.4 Limestone powder 37 μm 198.5 198.5 Limestone flour 2-25 μm Limestone flour 4-50 μm Limestone flour 20-200 μm 60 60 60 Limestone flour 30 μm 236 233 Glass fiber 3 mm 11 Flax fiber 2 mm 22 Cotton fiber 0.5 mm 6 6 4 Dralon fiber 1 mm 4 4 7 Cellulose fiber 40 microns 5 5 9 Metal soap / alkali soap 3 3 Quartz sand 0.1-0.5 mm 495 495 53.5 50.5 Quartz sand 0.05-0.25 mm 275 275 215.6 195.6 190.6 Quartz sand 0.2-0.6 mm 175 170 201.6 201.6 201.6 Quartz sand 0.3-0.7 mm 109.4 109.4 109.4 SUM parts by weight 1000 1000 1000 1000 1000 1000 1000 Water in ml per 1000 g 235 235 240 295 272 275 280 Table 2: test results Vbsp.1 Vbsp.2 EX3 EX4 Bsp.5 Bsp.6 Bsp.7 Glass fiber fabric Yes No No No No No No Adhesive tension N / mm2 0.13 0.12 0.14 0.15 0.15 0.14 0.14 EPS breakout% 72 76 100 100 100 100 100 Dent dent Joule 2.5 0.5 2.5 2.5 3.0 4.0 5.0 staying power very well very well Good very well very well Good very well suppleness Good Good Good Good Good Good Good air voids satisf satisf satisf satisf satisf Good Good

QUOTES INCLUDE IN THE DESCRIPTION

This list The documents listed by the applicant have been automated generated and is solely for better information recorded by the reader. The list is not part of the German Patent or utility model application. The DPMA takes over no liability for any errors or omissions.

Cited patent literature

• - DE 2516916 A1 [0003]
• DE 2703342 A1 [0003]
• - DE 4216204 A1 [0003]
• - DE 10248098 A1 [0005]
• - DE 3429251 C2 [0005]
• - DE 102004048584 B4 [0005]
• - DE 19839295 C5 [0005]
• - DE 4032769 C2 [0005]
• - DE 3040077 C2 [0005]

Cited non-patent literature

• - Schulze J. in TIZ, no. 9, 1985 [0013]
• - Fox TG, Bull. Physics Soc. 1, 3, Page 123 (1956) [0019]
• - Polymer Handbook 2nd Edition, J. Wiley & Sons, New York (1975) [0019]
• - DIN 53015 [0025]
• - DIN 53015 [0029]
• - DIN 18555-6 [0038]
• - ISO 7892 [0038]

Claims (9)

Dry mortar compositions comprising a) one or more hydraulic binders, b) one or more fillers, c) optionally further additives, characterized in that d) fibers and e) one or more water-redispersible polymer powders based on polymers of ethylenically unsaturated monomers, with a glass transition temperature Tg of -25 ° C to + 25 ° C, are included. Dry mortar compositions according to claim 1, characterized in that as component a) one or more hydraulic binders from the group comprising Portland cement, Aluminate cement and metallurgical cement, mixed cement, filler cements, hydraulic lime and gypsum are included. Dry mortar compositions according to claim 1 or 2, characterized in that as component b) an or several fillers from the group containing quartz sand, Quartz flour, calcium carbonate, chalk and hydrated lime are. Dry mortar compositions according to claim 1 to 3, characterized in that as component d) an or several fibers from the group of organic fibers or inorganic Fibers are included. Dry mortar compositions according to claim 1 to 4, characterized in that as component e) an or several water-redispersible polymer powder from the group containing copolymers with vinyl acetate and 5 to 50 wt .-% ethylene; Copolymers with vinyl acetate, 1 to 50 wt .-% of ethylene and 1 to 50% by weight of a vinyl ester of α-branched Monocarboxylic acids having 9 to 11 C atoms; copolymers with 30 to 75 wt .-% vinyl acetate, 1 to 30 wt .-% vinyl laurate or Vinyl ester of an alpha-branched carboxylic acid with 9 bis 11 C-atoms, and 1 to 30 wt .-% (meth) acrylic acid ester of unbranched or branched alcohols having 1 to 15 carbon atoms, which still contain 1 to 40 wt .-% ethylene; copolymers with vinyl acetate, 5 to 50% by weight of ethylene and 1 to 60% by weight of vinyl chloride; are included. Process for the production of reinforcing fabric-free Armierungsmassen, wherein the dry mortar compositions according to claim 1 to 5 with water to a mortar composition are stirred and the reinforcing mortar obtained therewith then applied to the insulation boards. Use of the dry mortar compositions according to claim 1 to 5 for the preparation of adhesives and coating agents. Use according to claim 7 for the preparation of adhesives for thermal insulation panels and sound insulation panels, Tile adhesives, and adhesives for bonding wood and wood-based materials. Use according to claim 7 for the production of mortars, Leveling, screeding, cleaning.