WO2011131279A1 - Mineral wool fiber mats, method for producing same, and use - Google Patents

Abstract

The invention relates to mineral wool fiber mats, which are stabilized by means of a binder made of polymers functionalized with epoxy groups and/or with carboxyl groups and selected cross-linking agents. Said mats can be used as an insulating material and are characterized by low or no formaldehyde emissions.

Description

 description

Mineral wool fiber mats, process for their preparation and use

The present invention relates to mineral wool fiber mats, which with a

impregnated selected binders. These mats can be used, for example, as insulation materials, for example for thermal insulation of roofs.

Aqueous polymer dispersions for use as binders for mineral wool fiber mats are known per se. For example, mineral wool mats with crosslinked polymers as binders are the subject of a wide variety of patent documents.

US-A-2008/0175997 describes binder compositions for glass mats comprising an emulsion of a carboxyl group-functionalized polymer and a crosslinker with aziridine groups. Compared to conventional

Systems is a formaldehyde-free dispersion. This has comparable or even improved strength and flexibility compared to known systems. This document mentions other known binder systems for glass mats derived from carboxyl group-functionalized polymers and having specific crosslinkers, for example, polyol compounds combined with phosphorus-containing accelerator, active hydrogen-containing compounds such as polyol, polyvinyl alcohol or polyacrylate combined with fluoroborate accelerator. or crosslinkers which promote the esterification between COOH and OH groups in the polymer, or epoxidized oils.

From EP-A-1, 018,523 a polymer dispersion is known which comprises a) dispersed polymer containing 5-20% by weight of copolymerized carboxylic acid units, b) dissolved polymer containing 60-100% by weight of copolymerized carboxylic acid contains units and c) contains selected alkoxylated long-chain amine as a crosslinker. This dispersion can be used as a binder for eg mineral wool mats.

DE-T-699 21 163 describes an insulating product based on mineral wool based on special mineral fibers, which is provided with a base on the basis of a thermosetting resin, wherein it is mixed with a latex to the mechanical strength after aging improve. In particular, polymers having hydrophilic groups, e.g. with carboxyl, hydroxyl or carboxylic ester groups. As the thermosetting resin is called phenolic resin. DE-A-197 38 771 and DE-A 197 20 674 describe binders for mineral wool containing a) a phenolic resin-crosslinkable thermoplastic polymer, such as polyacrylate or polyvinyl ester, b) phenolic resin and c) flame retardant.

From EP-A-1 164 163 a mineral wool binder is known which is prepared by mixing a carboxylic acid and an alkanolamine under reactive conditions. As the carboxylic acid, e.g. a polyacrylic acid, polymethacrylic acid or a polymaleic acid used.

WO-A-01 / 05,725 describes a mineral wool binder prepared by reacting a mixture which does not contain a polymer but has an amine and first and second anhydrides. Typical representatives of the reaction mixture are diethanolamine, cyclic aliphatic anhydride, e.g.

Maleic anhydride, succinic anhydride or hexahydrophthalic anhydride, and aromatic anhydride, for example, phthalic anhydride.

WO-A-2007 / 060,236 describes a formaldehyde-free binder for mineral wool comprising a) an aqueous dispersion of a polymeric polycarboxylic acid, b) a selected alkanolamine, for example ethanolamine, and c) an activated silane obtained by reacting a silane, eg Alkoxysilane, with an enolisable ketone containing at least one carboxyl group or with a ketone having at least one hydroxyl group, for example dihydroxyacetone or acetylacetone, was prepared.

From DE-A-100 14 399 a mixture of two polymeric systems is known, one of which necessarily carries carboxyl groups, while the second

contains polymerized functional groups capable of reacting with the

 Carboxyl groups of the first polymeric system to undergo a reaction to form a covalent bond.

From DE-A-26 04 544 binders for solidifying glass fiber mats are known, in which a carboxyl group-containing polymer is reacted with a crosslinker, wherein the crosslinker is selected from the group of polyepoxides or capped isocyanates. The polymer base of the binders used is limited to polymers which are composed of ethylenically unsaturated esters of acrylic or methacrylic acid.

JP-A-2006-089,906 describes a formaldehyde-free binder for

Mineral wool containing a vinyl copolymer having hydroxyl groups and groups derived from an organic acid.

In WO-A-2004 / 085.729 a formaldehyde-free binder for mineral wool is described which contains a) a compound having at least 2 cyclic ether groups and b) a copolymer having nucleophilic groups. WO-A-2006 / 136,614 discloses a binder for mineral wool comprising a) phenol-formaldehyde binder and b) a hydroxylamine or an aminoalcohol.

From DE-A-40 24 727 a means for the hydrophilization of mineral wool fibers is known which a) phenol-formaldehyde binder and as a hydrophilizing agent a mixture of b) water-soluble nitrogen-carbonyl compound, for example urea, c) Acrylic resin and d) mixture of carboxyl-containing fatty acid condensation products with organic phosphoric acid esters.

Furthermore, in a number of documents, epoxy- or carboxyl-functionalized binders have already been described. Examples thereof can be found in US-A-2008/0214716, US-A-2006/0258248, DE-C-199 56 420 and WO-A-03/104284. In WO-A-03/104284 binder systems for the preparation of

Glass fiber products described in which low molecular weight epoxy compounds are crosslinked with functionalized polymeric compounds. In US-A-2006/0258248, epoxidized oils are used in conjunction with multifunctional oils

Carboxylic acids or their anhydrides as suitable crosslinking binder disclosed. In US-A-2008/0214716 there are disclosed binders for the production of fiber fabrics from an ethylenically unsaturated monomer-based polymer, a water-soluble polymer based on ethylenically unsaturated carboxylic acids and an alkoxylated or hydroxyalkylated crosslinker. In DE-C-199 56 420 the use of water-soluble polymers based on ethylenically unsaturated

Carboxylic acids and certain amines described in the presence of an epoxy or acrylic resin-based crosslinking agent for the production of moldings. The market is increasingly demanding products that are formaldehyde-free in the formulation and emission during the application process while preserving the current property profile.

The object was therefore to provide bonded mineral wool fiber mats, which are distinguished by the fact that they are bound by formaldehyde-free binders and are outstandingly suitable as insulating materials. The present invention relates to a mineral wool fiber mat bound with a binder comprising a copolymer functionalized with epoxide groups and / or with carboxyl groups, in particular containing one corresponding to functionalized emulsion copolymer, preferably in dispersion form, and an amine and / or an amine derivative as crosslinker.

In a preferred embodiment of the present invention, the mineral wool fiber mat contain a bio-soluble fiber material, which by a

Formaldehyde-free binder is connected, which is applied in a pH range in which the fibers are not attacked. This range ideally moves above the neutral point. This pH range is preferably 7.5-10.

The mineral wool fiber mats according to the invention contain glass wool and / or rock wool, and may in principle contain further additives known to the person skilled in the art and / or further fibers. For the production of glass wool, all known from the glass industry raw materials can be used. Usually quartz sand, soda and limestone are used; these raw materials may be mixed with waste glass,

For example, up to 70 wt.% Of waste glass. The melt is spun or atomized into fibers in a manner known per se.

For the production of rock wool can be proceeded similar to the production of glass wool. Usually basalt, diabase, feldspar, dolomite, sand and limestone are used; These raw materials can also be used glass

be mixed. The melt is spun in a conventional manner to fibers. In addition to the usual starting materials for the production of rock wool and slags can be used, which are incurred as waste products in combustion or manufacturing processes, for example

Blast furnace slag. This form of rockwool called slag wool is also known to the person skilled in the art.

The glass or stone wool used are preferably selected so that they have a high biosolubility. Below that is the ability of the fibers understood to be dissolved in the body by the body's own substances and degraded.

The resulting glass or stone wool fiber mats, the binder is added to ensure their dimensional stability. Subsequently, the fiber mat is through

Heat treatment, for example, in a hot air stream, cured. In addition, volatile components are removed from the fiber mat. Web forming processes of this type are described, for example, in US 2008/0175997 A1. In an alternative method of production, mineral wool fiber mats can also be produced by a wetlaying technique. For this purpose, fibers can be introduced together with the binder in an aqueous slurry and deposited on a moving storage device, for example a water-permeable conveyor belt, to form a fiber mat. After removal of the water, the fiber mat is cured by heat treatment, for example in a hot air stream.

 Production processes for mineral wool mats of this type are described for example in DE 601 23 177 T2.

Furthermore, the mineral wool mats may contain other conventional additives. So z. B. often added mineral oils that improve the processability and give the mineral wool mats improved water-repellent properties. In addition, such mats can be laminated with aluminum foil or nonwovens, especially if they are used as insulating material. The mineral wool fiber mats according to the invention are provided with a special

 A binder containing a functionalized with epoxy groups and / or with carboxyl groups copolymer.

The copolymers functionalized with epoxide groups and / or with carboxyl groups are preferably derived from one or more ethylenically unsaturated

Compounds, wherein at least one of these monomers must have one or more epoxy groups and / or one or more carboxyl groups. These embodiments include as reactive groups either only

copolymerized epoxide groups or only polymerized carboxyl groups or in addition to the copolymerized epoxide groups additionally polymerized

Carboxyl groups, e.g. of units derived from ethylenically unsaturated mono- or dicarboxylic acids. The selection of these embodiments is dependent inter alia on further additives to the binder formulation and / or of the

Reaction conditions which prevail during application (eg in the binding of mineral wool in the binding process).

In addition to these copolymers, it is also possible to use homopolymers or copolymers which are derived completely or predominantly from carboxyl-containing ethylenically unsaturated monomers. Examples of these are polyacrylic acid or its salts, and also polymethacrylic acid or its salts, in particular the alkali metal salts of these polymers.

For those functionalized with epoxide groups and / or with carboxyl groups

Copolymers are preferably copolymers of vinyl esters and / or of esters of α, β-ethylenically unsaturated C 3 -C ₈ -mono- or dicarboxylic acids and / or of alkenylaromatics, each containing epoxide groups and / or with

 Carboxylic groups or their anhydrides containing ethylenically unsaturated comonomers have been polymerized.

As a basis for the polymer classes mentioned, in addition to the monomers containing epoxide groups and / or the monomers containing carboxyl groups, the following are mainly the following groups of monomers:

One group comprises vinyl esters of monocarboxylic acids containing from one to eighteen carbon atoms, for example vinyl formate, vinyl acetate, vinyl propionate,

Vinyl isobutyrate, vinyl valerate, vinyl valerate, vinyl pivalate, vinyl 2-ethylhexanoate, vinyl decanoate, isopropenyl acetate, vinyl ester of saturated branched

Monocarboxylic acids having 5 to 15 carbon atoms in the acid radical, in particular Vinyl esters of Versatic acids, vinyl esters of long-chain saturated or unsaturated fatty acids such as vinyl laurate, vinyl stearate and

Vinyl ester of benzoic acid and substituted derivatives of benzoic acid such as vinyl p-tert-butylbenzoate. Among them, however, vinyl acetate as the main monomer is particularly preferable.

Another group of monomers are esters of α, ß-ethylenically unsaturated Cβ-Cr mono- or dicarboxylic acids with preferably C-i-C-is-alkanols and in particular C-i-Cs alkanols or Cs-Cs-cycloalkanols in question. The esters of dicarboxylic acids_ can be half esters or, preferably, diesters. Suitable CrCs alkanols are, for example, methanol, ethanol, n-propanol, i-propanol, 1-butanol, 2-butanol, isobutanol, tert-butanol, n-hexanol and 2-ethylhexanol. Suitable cycloalkanols are, for example, cyclopentanol or cyclohexanol. Examples are esters of acrylic acid, methacrylic acid, crotonic acid, maleic acid, itaconic acid, citraconic acid or fumaric acid, such as (meth) acrylic acid methyl ester, (meth) acrylic acid ethyl ester, (meth) acrylic acid isopropyl ester, (meth) acrylic acid n-butyl ester , (Meth) acrylic acid isobutyl ester,

(Meth) acrylic acid 1-hexyl ester, (meth) acrylic acid tert-butyl ester, (meth) acrylic acid 2-ethylhexyl ester, di-n-methylmaleinate or fumarate, di-n-ethylmaleinate or fumarate, di-n-propylmaleinate or fumarate, di-n-butyl maleate or fumarate, diisobutyl maleate or fumarate, di-n-pentyl maleate or fumarate, di-n-hexyl maleate or fumarate, dicyclohexyl maleate or fumarate, di-n-heptyl maleate or fumarate, di-octyl maleate or fumarate, di (2-ethylhexyl) maleate or fumarate, di-n-nonyl maleate or fumarate, di-n-decyl maleate or fumarate, di-n-undecyl maleate or fumarate , Dilauryl maleate or fumarate, dimyristyl maleate or fumarate, dipalmitoyl maleate or fumarate, di-stearyl maleate or fumarate, and

Diphenylmaleinate or fumarate.

Preferred main monomers of this group are selected from the group of acrylates and methacrylates. Particular preference is given to methyl (meth) acrylate, ethyl (meth) acrylate, isopropyl (meth) acrylate, n-butyl (meth) acrylate, isobutyl (meth) acrylate, (meth) acrylic acid hexyl ester,

(Meth) acrylic acid tert-butyl ester, (meth) acrylic acid 2-ethylhexyl ester. Another group of monomers are the alkenylaromatics. These are monoalkenylaromatics. Examples of these are styrene, vinyltoluene, vinylxylene, α-methylstyrene or o-chlorostyrene. In particular, styrene is to be mentioned as a preferred monomer in this group.

The preferred monomers usually form the main monomers, which normally account for more than 50% by weight, preferably more than 75%, of the total amount of monomers to be polymerized.

Another group of monomers which can be used mainly together with vinyl esters and / or esters of α, β-ethylenically unsaturated C 3 -C ₈ -mono- or dicarboxylic acids and / or alkenylaromatics form aliphatic, monoolefinically or diolefinically unsaturated, optionally halogen-substituted Hydrocarbons, such as ethene, propene, 1-butene, 2-butene, isobutene, conjugated C ₄ -C 8 -dienes, such as 1, 3-butadiene, isoprene, chloroprene, vinyl chloride, vinylidene chloride, vinyl fluoride or vinylidene fluoride.

The monomers are preferably to be selected so that a polymer or copolymer with good compatibility in common formaldehyde-free

Binder formulations arises, which additionally has excellent binding properties in the production of mineral wool mats.

Preferably used binder polymers are derived from addition to the epoxide group-containing monomers and / or from the carboxyl groups

Monomers of the following main monomers or combinations thereof:

Copolymers based on one or more vinyl esters, in particular vinyl acetate; Copolymer esters alpha, beta-ethylenically unsaturated C3-C ₈ mono with CiC ₈ based - acrylic acid alkanols, especially esters of (meth) acrylates; Copolymers based on vinyl esters and esters of α, β-ethylenically unsaturated C 3 -C ₈ -mono- or dicarboxylic acids with C 1 -C ₈ -alkanols, in particular esters of (meth) acrylic acid and maleic- or fumaric acid;

 Copolymers based on vinyl esters, in particular vinyl acetate, with ethylene;

Copolymer based on esters of α, ß-ethylenically unsaturated C3-Ce mono- or dicarboxylic acids with Ci-Cs-alkanols, in particular esters of (meth) acrylic acid and maleic or fumaric acid, with ethylene;

Copolymers based on vinyl esters, ethylene and esters of α, ß-ethylenically unsaturated C3-C ₈ mono- or dicarboxylic acids with Ci-Cs-alkanols, in particular esters of

(Meth) acrylic acid and maleic or fumaric acid; or

 Copolymers based on styrene and esters of α, ß-ethylenically unsaturated C3-C8 mono- or dicarboxylic acids with Ci-Cs-alkanols, in particular esters of

(Meth) acrylic acid and optionally ethylene and / or butadiene. Preferred epoxy group-containing monomers which can be copolymerized with the main monomers are, for example, allyl glycidyl ether,

Methacrylic glycidyl ethers, butadiene monoepoxides, 1,2-epoxy-5-hexene, 1,2-epoxy-7-octene, 1,2-epoxy-9-decene, 8-hydroxy-6,7-epoxy-1-octene, 8- Acetoxy-6,7-epoxy-1-octene, N- (2,3-epoxy) -propylacrylamide, N- (2,3-epoxy) -propylmethacrylamide, 4-acrylamidophenyl glycidyl ether, 3-acrylamidophenyl glycidyl ether, 4-methacrylamido phenyl glycidyl ether, 3-methacrylamidophenyl glycidyl ether, N-glycidoxymethyl acrylamide, N-glycidoxypropyl methacrylamide, N-glycidoxyethyl acrylamide, N-glycidoxyethyl methacrylamide, N-glycidoxypropyl acrylamide, N-glycidoxypropyl methacrylamide, N-glycidoxybutyl acrylamide, N-glycidoxybutyl methacrylamide, 4-acrylamidomethyl-2,5-dimethylphenyl glycidyl ether, 4-methacrylamido-methyl-2,5-dimethylphenyl glycidyl ether, acrylamidopropyl-dimethyl- (2,3-epoxy) propylammonium chloride, methacrylamidopropyldimethyl (2,3-epoxy) propylammonium chloride and glycidyl methacrylate monomers containing epoxide groups which differ from glycidyl esters of ethylenically unsaturated monocarboxylic or dicarboxylic acids a Glucides such as glycidyl acrylate and glycidyl methacrylate are particularly preferred. The proportion by weight of the epoxy group-containing monomers based on the

Total amount of the monomers to be polymerized is less than 50 wt .-%, preferably between 0.1 and 20 wt .-%, particularly preferably between 1 and 10 wt .-%, and most preferably between 2 and 5 wt .-%.

In addition to the main monomers mentioned above, the binder polymers used according to the invention may contain at least structural units which derive from monomers containing carboxyl groups. This group includes mainly α, β-monoethylenically unsaturated mono- and dicarboxylic acids having 3 to 10 carbon atoms and their water-soluble salts, eg. B. their sodium salts, and their anhydrides. Preferred monomers from this group are ethylenically unsaturated C ₃ -C 8 -carboxylic acids and C 4 -C 8 -dicarboxylic acids, eg. Example, maleic or fumaric acid, itaconic acid, crotonic acid,

Vinylacetic acid, 2-carboxyethyl (meth) acrylate, acrylamidoglycolic acid and especially acrylic acid, methacrylic acid, and the half-esters of maleic and fumaric acid such as ηοηο-2-ethylhexylmaleinat or monoethylmaleinate

These carboxyl-containing monomers are normally in amounts, based on the total amount of the monomers to be polymerized, of less than 50 wt.%, Preferably between 0.1 and 20 wt .-%, particularly preferably between 1 and 10 wt .-%. , and most preferably copolymerized between 2 and 5 wt .-%. Particularly preferred binders for mineral wool fiber mats include one

Epoxide groups functionalized copolymer based on a polyvinyl ester, a polyacrylate or a Polyalkenylaromaten having polymerized units derived from glycidyl esters of ethylenically unsaturated mono- or dicarboxylic acids, preferably of glycidyl esters of acrylic or methacrylic acid. Particularly preferred binders for mineral wool fiber mats include one

Carboxyl functionalized copolymer based on a polyvinyl ester, a polyacrylate or a Polyalkenylaromaten having polymerized units derived from ethylenically unsaturated mono- or dicarboxylic acids, preferably half esters of fumaric or maleic acid or of acrylic or methacrylic acid.

Particularly preferred binders for mineral wool fiber mats include one

Epoxide groups and carboxyl-functionalized copolymer based on a polyvinyl ester, a polyacrylate or a Polyalkenylaromaten having copolymerized units derived from glycidyl esters of ethylenically unsaturated mono- or dicarboxylic acids, preferably glycidyl esters of acrylic or methacrylic acid, and having polymerized units, which of ethylenically unsaturated mono- or dicarboxylic acids,

preferably derived from half esters of fumaric or maleic acid or of acrylic acid or methacrylic acid.

Another particularly preferred embodiment of the binder is based on copolymers functionalized with epoxide groups, which are derived from alkenylaromatics, preferably from styrene, and from esters of acrylic acid and / or the

 Derive methacrylic acid and having polymerized units which are derived from glycidyl esters of ethylenically unsaturated mono- or dicarboxylic acids, preferably of glycidyl esters of acrylic acid and / or methacrylic acid. Another particularly preferred embodiment of the binder is based on epoxy-functionalized copolymers which are derived from esters of α, ß-ethylenically unsaturated C3-Cs mono- or dicarboxylic acids and polymerized

Comprising units which are derived from glycidyl esters of ethylenically unsaturated monocarboxylic acids, preferably from glycidyl esters of acrylic acid and / or methacrylic acid. A further preferred embodiment of the binder is based on copolymers functionalized with epoxide groups, which are derived from one or more vinyl esters, in particular vinyl acetate, and have copolymerized units which differ from ethylenically unsaturated glycidyl esters

Monocarboxylic acids, preferably derived from glycidyl esters of acrylic acid and / or methacrylic acid. The epoxide groups mentioned functionalized

Copolymers may contain further structural units which are derived from esters of α, β-ethylenically unsaturated C ₃ -C 8 monocarboxylic or dicarboxylic acids with C ₁ -C 6 -alkanols, from C ₃ -C -ethylenically unsaturated C ₃ -C 8 -mono- or dicarboxylic acids, such as eg acrylic acid,

Methacrylic acid, maleic acid or fumaric acid, of olefins, e.g. Ethylene or butadiene or a combination of two or more of these monomers derived.

Selected copolymers functionalized with epoxide groups and / or with carboxyl groups are:

 Copolymers derived from vinyl esters of saturated carboxylic acids and of

Glycidyl esters of ethylenically unsaturated carboxylic acids or of ethylenically unsaturated mono- or dicarboxylic acids;

 Copolymers derived from vinyl esters of saturated carboxylic acids, from esters of acrylic acid and / or methacrylic acid and / or fumaric acid and / or maleic acid with C 1 -C 8 -alkanols and from glycidyl esters of ethylenically unsaturated carboxylic acids or of ethylenically unsaturated monocarboxylic or dicarboxylic acids;

Copolymers derived from vinyl esters of saturated carboxylic acids, of ethylene, of ethylenically unsaturated carboxylic acids and of glycidyl esters of ethylenically unsaturated carboxylic acids or of ethylenically unsaturated mono- or

dicarboxylic acids;

Copolymers derived from vinyl esters, ethylene, esters of acrylic acid and / or methacrylic acid and / or fumaric acid and / or maleic acid with CrC ₈ - alkanols, of ethylenically unsaturated mono- or dicarboxylic acids and of

Glycidyl esters of ethylenically unsaturated carboxylic acids; Copolymers derived from esters of acrylic acid and / or methacrylic acid, of ethylenically unsaturated mono- or dicarboxylic acids and of glycidyl esters of ethylenically unsaturated carboxylic acids;

 Copolymers derived from styrene and optionally butadiene and / or esters of acrylic acid and / or methacrylic acid with C-i-Ce-alkanols, of ethylenic

unsaturated mono- or dicarboxylic acids and of glycidyl esters ethylenically

unsaturated carboxylic acids.

Of course, other comonomers which modify the properties in a targeted manner, be used in the polymerization. Such auxiliary monomers are normally copolymerized only as modifying monomers in amounts, based on the total amount of the monomers to be polymerized, of less than 10% by weight. These monomers can have different functions; for example, they may serve to stabilize polymer dispersions, or they may improve film cohesion or other properties by crosslinking during polymerization or during film formation, and / or may react with the crosslinker through appropriate functionality.

Monomers which can serve for further stabilization are usually

Monomers having an acid function and / or salts thereof. In addition to the carboxyl-containing monomers listed above, which also contribute to increasing the crosslinking density in the binding process of mineral wool fiber mats, other monomers with other acid functions, such as ethylenically unsaturated sulfonic acids, ethylenically unsaturated phosphonic acids or dihydrogen phosphates and their water-soluble salts, eg. B. their

Sodium salts, are used. Preferred monomers from this group are vinylsulfonic acid and its alkali metal salts, acrylamidopropanesulfonic acid and their

Alkali salts, as well as vinylphosphonic acid and its alkali metal salts. Examples of crosslinking auxiliary monomers are monomers having two or more vinyl radicals, monomers having two or more vinylidene radicals, and monomers having two or more alkenyl radicals. Particularly advantageous are the diesters of dihydric alcohols with α, β-monoethylenically unsaturated monocarboxylic acids, among which acrylic and methacrylic acid are preferred, the diesters of dibasic carboxylic acids with ethylenically unsaturated alcohols, other hydrocarbons having two ethylenically unsaturated groups or the di-esters. Amides of divalent amines with α, β-monoethylenically unsaturated

Monocarboxylic acids.

Examples of such two non-conjugated ethylenically unsaturated double bonds monomers are alkylene glycol diacrylates and dimethacrylates, such as ethylene glycol diacrylate, 1, 2-propylene glycol diacrylate, 1, 3-propylene glycol diacrylate, 1, 3-Butylenglykoldiacrylat, 1, 4-Butylenglykoldiacrylate or methacrylates and ethylene glycol diacrylates or - methacrylates, 1,2-propylene glycol dimethacrylate, 1,3-propylene glycol dimethacrylate, 1,3-butylene glycol dimethacrylate, 1,4-butylene glycol dimethacrylate, hexanediol diacrylate, pentaerythritol diacrylate and divinylbenzene, vinyl methacrylate, vinyl acrylate, vinyl crotonate, allyl methacrylate, allyl acrylate, diallyl maleate, Diallyl fumarate, diallyl phthalate, methylenebisacrylamide, cyclopentadienyl acrylate, divinyl adipate or methylenebisacrylamide.

However, it is also possible to use monomers having more than two double bonds, for example tetraallyloxyethane, trimethylolpropane triacrylate or

Triallyl.

Another group of auxiliary monomers form those which are crosslinkable via carbonyl groups or self-crosslinking. Examples are diacetone acrylamide,

Allyl acetoacetate, vinyl acetoacetate and acetoacetoxyethyl acrylate or methacrylate.

Another group of auxiliary monomers is suitable, either by self-crosslinking or with a suitable monomeric reactant and / or with to react under crosslinking conditions under existing conditions:

This group includes monomers with N-functional groups, in particular (meth) acrylamide, allyl carbamate, acrylonitrile, methacrylonitrile, N-

Methylol (meth) acrylamide, N-methylolallyl carbamate and the N-methylol esters, alkyl ethers or Mannich bases of N-methylol (meth) acrylamide or N-methylolallyl carbamate, acrylamidoglycolic acid, methyl acrylamidomethoxyacetate, N- (2,2-dimethoxy-1-hydroxyethyl ) -acrylamide, N-dimethylaminopropyl (meth) acrylamide, N-methyl (meth) acrylamide, N-butyl (meth) acrylamide, N-cyclohexyl (meth) acrylamide, N-dodecyl (meth) acrylamide, N-benzyl ( meth) acrylamide, p-hydroxyphenyl (meth) acrylamide, N- (3-hydroxy-2,2-dimethylpropyl) methacrylamide, ethylimidazolidone (meth) acrylate, N- (meth) acryloyloxyethylimidazolidin-1-one, N- ( 2-methacrylamidoethyl) imidazolin-2-one, N- [3-allyloxy-2-hydroxypropyl] aminoethyl] imidazolin-2-one, N-vinylformamide, N-vinylpyrrolidone or, N-vinylethyleneurea.

Another group of auxiliary monomers form hydroxy-functional monomers such as the methacrylic acid and acrylic acid Ci-Cg hydroxyalkyl esters, such as n-hydroxyethyl, n-hydroxypropyl or n-hydroxybutyl acrylate and methacrylate and their adducts with ethylene oxide or propylene oxide,

Another group of Hilfsmonomeren consists of silane-containing monomers z. Vinyltrialkoxysilanes, such as vinyltrimethoxysilane, vinyltriethoxysilane, alkylvinyldialkoxysilanes or (meth) acryloxyalkyltrialkoxysilanes, e.g. B. (meth) acryloxy-ethyltrimethoxysilane, or (meth) acryloxypropyltrimethoxysilane.

It is preferred within the scope of the present invention that as far as possible no functional monomers are used which contain free or bound formaldehyde. If this is necessary in the context of specific product customization, a compound that acts as a formaldehyde scavenger is usually included. Relevant examples are N- or S-nucleophiles such as urea or sodium bisulfite and other compounds described in the literature. The binders used according to the invention can be prepared by any method of radical polymerization. Examples are the

Polymerization in bulk, in solution, in suspension or in particular the

Emulsion polymerization.

Preferred binders comprise aqueous polymer dispersions with the copolymers described above containing epoxide and / or carboxyl groups. The application of these dispersions on the mineral wool fiber mats is solvent-free or nearly solvent-free.

In addition to the polymers containing epoxide groups and / or carboxyl groups, the dispersions preferably used according to the invention contain protective colloids and / or emulsifiers.

Protective colloids are polymeric compounds which are present during the emulsion polymerization and which stabilize the dispersion.

Suitable protective colloids are, for example, polyvinyl alcohols, polyalkylene glycols, cellulose, starch and gelatin derivatives or polymers derived from N-vinylpyrrolidone, N-vinylcaprolactam, N-vinylcarbazole, 1-vinylimidazole, 2-vinylimidazole, 2-vinylpyridine, 4-vinylpyridine , Acrylamide, methacrylamide, amine group-bearing acrylates, methacrylates, acrylamides and / or methacrylamides. A detailed description of other suitable protective colloids can be found in Houben-Weyl, Methods of Organic Chemistry, Volume XIV / 1, Macromolecular Materials, Georg Thieme Verlag, Stuttgart, 1961, pages 411-420.

Emulsifiers are low molecular weight and surface active compounds which are present during the emulsion polymerization and which stabilize the dispersion. In the dispersions used according to the invention, it is possible to use ionic and / or nonionic and / or amphoteric emulsifiers, very particularly preferably nonionic emulsifiers or combinations of

nonionic emulsifiers and anionic emulsifiers. A list suitable emulsifiers can be found in Houben-Weyl, Methods of Organic Chemistry, Volume XIV / I, Macromolecular substances, Georg Thieme Verlag, Stuttgart, 1961, p 192-208). The proportion of protective colloids can be up to 20% by weight, based on the dispersion, of preferably from 1 to 10% by weight, in particular from 2 to 8% by weight.

The proportion of emulsifiers may also be up to 10% by weight, based on the dispersion, preferably from 1 to 6% by weight.

The binders used according to the invention contain at least one

selected crosslinkers from the group of amines, their derivatives, including preferably the hydrophobically modified amines, and the amides, in particular the amidated amines. The amines or amine derivatives used as crosslinkers should be present neither in alkoxylated nor in hydroxyalkyierter form.

The crosslinkers used according to the invention are, for example, mono- or polyamines, in particular diamines, preferably

aliphatic mono- or diamines or aromatic mono- or diamines. The amino groups of the crosslinkers used according to the invention can be primary, secondary and / or tertiary amino groups. Preferably, the crosslinkers contain one or more primary or secondary amino groups.

Preference is given to amine derivatives as crosslinkers, in which a part of the

Amino groups was converted by reaction with hydrophobic acids in amide groups. The amine derivatives may have one or more amide groups.

Particular preference is given to using polyaminoamides. These are usually condensation products of unsaturated aliphatic acids with polyamines. Such products are sold under the name Versamid ^® commercially. Examples of such compounds can be found in EP-A-1, 533,331. Preferred crosslinkers from the group of amine derivatives having amidic structures are oligomeric or polymeric compounds derived from a carboxylic acid, in particular derived from mono- or dicarboxylic acids or from a mixture of such carboxylic acids including the ethylenically unsaturated carboxylic acids and di-, oligo- or polyamines. The ethylenically unsaturated carboxylic acids may thereby form multimers, preferably from 2 to 10 carboxylic acid units.

Particularly preferred crosslinking polymers are derived from unsaturated

Carboxylic acids and diamines or of dimers ethylenically unsaturated

Carboxylic acids and di- or oligoamines from.

Further preferred crosslinkers of polyaminoamides have an amine number according to ASTM D 2073 between 100 and 2000 mg KOH / g crosslinker, preferably between 250 and 1000 mg KOH / g crosslinker.

Particularly preferred are crosslinkers of Versamid® series (Cognis GmbH, Germany), such as Versamid ^® 150 or Versamid ^® used the 250th

The crosslinkers used according to the invention are typically present in amounts of from 0.1 to 10% by weight, based on the binder.

Preferred crosslinker concentrations are between 1 and 10% by weight, in particular between 2 and 7% by weight. If carbonyl group-containing auxiliary monomers are present in a copolymer of the binder, crosslinking can additionally take place via these groups. Suitable crosslinkers for this purpose are compounds selected from the group of the bis- or polyoxazolines, the bis- or polyiminooxazolidines, the carbodiimides, the bis- or polyepoxides or the capped isocyanates (as described, for example, in EP-A-206,059

described). Furthermore, compounds having an at least divalent metal ion can be used for further crosslinking. It refers to

Compounds that can form complexes or coordinate bonds with the carboxyl groups of the binder polymer. Typically, belong to this group of salts of Al ^3+, Zn ^2+, Sn ^2+, Sn ^+, Ti ^4+, Ti0 ^{2 + 4} * Hf, Zr ^{4+ 2+} Hf0, Zr0 ²⁺ and other multivalent ions. Ideally, these ions may include other components of the binder in the crosslinking, and in this way the

Increase crosslink density. These include, for example, the poly (vinyl alcohol) commonly used as a protective colloid.

The binders used according to the invention may contain further conventional additives

contain. These include, for example, film-forming aids for lowering the minimum film-forming temperature ("MFT-reducer"), plasticizers, buffers, pH adjusters, dispersants, defoamers, fillers, dyes, pigments, silane coupling agents, thickeners, viscosity regulators, solvents and / or preservatives.

The binder used according to the invention is to be used in a formulation in which a pH is adjusted within a range which is optimal for a suitable reactivity of the functional groups of the polymeric binder with the groups of the crosslinker. This pH range is preferably above the neutral point. This pH range is preferably 7.5-10.

A suitable pH can be used after the emulsion polymerization to prepare the polymer dispersion or after addition of the crosslinker, e.g. of the amidated amine, or it can be post-adjusted by addition of pH adjusters in the formulation.

The preparation of the polymer dispersions used with particular preference is carried out under the customary continuous or batchwise methods of free-radical emulsion polymerization. The implementation of a free-radically initiated aqueous emulsion polymerization of ethylenically unsaturated monomers is often described above and the

Expert therefore sufficiently known [see. for example, Encyclopedia of Polymer Science and Engineering, Vol. 8, pp. 659-677, John Wiley & Sons, Inc., 1987; DC Blackley, Emulsion Polymerization, pp. 155-465, Applied Science Publishers, Ltd., Essex, 1975; DC Blackley, Polymer Latices, 2 ^nd Edition, Vol I, pages 33 to 415, Chapman & Hall., 1997; H. Warson, The Applications of Synthetic Resin

Emulsions, pages 49 to 244, Ernest Bonn. Ltd. London, 1972; D. Diederich, Chemistry in our Time 1990, 24, pages 135 to 142, Verlag Chemie, Weinheim; J. Piirma, Emulsion Polymerization, pp. I-287, Academic Press, 1982; F.

 Hölscher, dispersions of synthetic high polymers, pages I to 160 Springer Verlag, Berlin, 1969 and the patent DE-A 40 03 422]. It is usually carried out by dispersing the ethylenically unsaturated monomers, often with the concomitant use of dispersants, in an aqueous medium and by means of

polymerized at least one radical polymerization initiator.

Here, water-soluble and / or oil-soluble initiator systems such as peroxodisulfates, azo compounds, hydrogen peroxide, organic hydroperoxides or dibenzoyl peroxide are used. These may be either alone or in combination with reducing compounds such as Fe (II) salts, sodium pyrosulfite, sodium hydrogen sulfite, sodium sulfite, sodium dithionite, sodium formaldehyde sulfoxylate, 2-hydroxyphenyl-hydroxymethylsulfinic acid or its sodium salt, 4-methoxyphenylhydroxymethylsulfinic acid or its sodium salt, 2-hydroxy 2-sulfinatoacetic acid or its disodium or zinc salt and 2-hydroxy-2-sulfinatopropionic acid or its disodium salt, or ascorbic acid or its salts or isoascorbic acid or its salts are used as the redox catalyst system.

The polymeric protective colloids and / or emulsifiers can be added before or during the polymerization. Additional addition of polymeric stabilizers and / or emulsifiers is also possible. If appropriate, additives intended for the desired application are then added to this dispersion. The formulation of the binders according to the invention can be carried out in the apparatus known to the person skilled in the art, for example in stirred kettles or suitable mixers.

After the preparation of the binder, this is usually applied directly to mineral wool fibers for the production of mineral wool fiber mats. This can be done by relevant, known to those skilled application method, for example by spraying the dispersion. The reactive binder cures after the application and thermal treatment of the wet raw fleece and solidifies and thus stabilizes the mineral wool fiber mat. The curing reaction is preferably triggered by a temperature increase. The rate of cure may, as known to those skilled in the art, be influenced by further measures of the formulation. Typical curing temperatures are preferably 70 ° C - 250 ° C, in particular 130 ° C - 180 ° C.

The invention also relates to a process for the preparation of the above defined

Mineral wool fiber mat comprising the steps:

 i) applying a crosslinkable composition comprising a

 Epoxide groups and / or carboxyl-containing copolymer and a crosslinker selected from the group of amines or

 Amine derivatives on an unbound mineral wool fiber mat, and

 j) solidifying the mineral wool fibers into a bonded mineral wool fiber mat, thereby crosslinking the binder

The mineral wool fiber mats according to the invention are distinguished by very low, preferably no formaldehyde emissions, with comparable mechanical strengths and application properties. The mineral wool fiber mats according to the invention can be used above all as insulating material, in particular for insulation, in particular thermal insulation of buildings and construction objects of all kinds. The following examples serve to illustrate the invention. The parts and percentages given in the examples are by weight unless otherwise stated.

EMBODIMENTS Dispersion A: 2.97 parts of ^® Emulsogen EPN 287 were used in a stirred glass kettle with stirrer, anchor stirrer, feed options and electronic temperature control

(Nonionic emulsifier from Clariant), 0.5 part of ^® Emulsogen LS (anionic emulsifier from Clariant), 0.25 part of sodium acetate, 0.51 parts

Sodium vinyl sulfonate, 0.04 part sodium metabisulfite and 0.00023 parts

Ammonium iron (II) sulfate (as a 1% solution) dissolved in 60 parts of deionized water (= template).

5 parts of vinyl acetate were emulsified into the original with stirring. Thereafter, the template was heated to 65 ° C, at 40 ° C, a solution of 0.22 parts

Sodium persulfate in 1, 77 parts of deionized water to start the

Polymerization reaction were added.

Upon reaching the internal temperature of 65 ° C was started with the dosage of 95 parts of vinyl acetate and 3 parts of glycidyl methacrylate over 240 minutes. During the reaction, the internal temperature was maintained at 65 ° C. 30 minutes before

 When the monomer metering was complete, the temperature was raised from 65 ° C. to 85 ° C. within 30 minutes and a solution of 0.11 part of sodium persulfate in 1, 77 parts of deionized water was metered in parallel over 30 minutes.

Upon completion of the monomer feed, the batch became 85 ° C

Held for minutes and then cooled. Solids content: 60.7%

 Viscosity Brookfield RVT (23 ° C), spindle 2, 20 rpm: 780 mPas

pH value: 4.2. Dispersions B:

0.25 parts of ^® Disponil A 3065 (nonionic emulsifier from Cognis) were initially dissolved in 31.5 parts of deionized water in a stirred glass kettle with stirrer, anchor stirrer, feed facilities and electronic temperature control (= receiver).

In parallel, 2.72 parts of ^® Disponil A 3065 and 2 parts of ^® Disponil FES 77 (anionic emulsifier from Cognis) in 55.6 parts were in a separate vessel

dissolved deionized water. A monomer mixture of 30 parts of methyl methacrylate, 10 parts of butyl acrylate, 60 parts of styrene, 1, 5 parts of glycidyl methacrylate, 2 parts of methacrylic acid and 1 part of acrylic acid was emulsified into this solution with vigorous stirring (= monomer emulsion.

Furthermore, solutions of 0.195 parts of sodium persulfate in 2.92 parts of deionized water (= oxidizer solution) and of 0.1 part of sodium metabisulfite in 0.91 parts of water (= reductant solution) were prepared

The original was heated to 80 ° C. Then, 2.85% (by weight) of the monoemulsion and 22.8% (by weight) of the reducing agent solution were dropped into the original. After 5 minutes, 33.3% of the oxidizer solution was added to this mixture to start the polymerization reaction. After a further 15 minutes, the monoemulsion and initiator system (oxidizer and reductor solution) were started by adding the monoemulsion over 240 minutes and the two solutions of the initiator system in parallel over 225 minutes. While

Reaction start and dosing, the internal temperature of the reactor was maintained at 80 ° C. After completion of the monomer metering, a solution of 0.023 part of the defoamer ^® Tego Foamex 805 (Evonik) in 0.13 part of deionized water was added over 5 minutes. Immediately following, 1 part of methyl methacrylate was added dropwise over 10 minutes to the polymer. After rapid addition of a solution of 0.065 part of sodium persulfate in 0.21 part of deionized water, the

 Temperature at 85 ° C, where it was held for over 90 minutes. Subsequently, the internal temperature was lowered to 65 ° C and a solution of 0.11 parts

®Trigonox AW 70 (70% aqueous solution of tert-butyl hydroperoxide from Akzo) in 0.42 part of deionized water. After 15 minutes, a solution of 0.11 part of sodium metabisulfite in 0.42 part of deionized water was added and maintained for a further 15 minutes. This process was repeated immediately afterwards. After addition of 0.033 part of ammonia (as a 25% solution) in 0.13 part of deionized water, the internal temperature was brought to below 40 ° C and adjusted using the dilute ammonia solution, a pH of 4.5.

Solids content: 53.1%

 Viscosity Brookfield RVT (23 ° C), spindle 1, 20 rpm: 120 mPas

pH value: 4.5. Determination of the crosslinking density in mixtures of glycidyl-functionalized dispersions and amidated amines as crosslinkers

In the production of mineral wool fibers are mainly used in the prior art phenol-formaldehyde resins that form close-knit three-dimensional networks on the curing process. The high density of crosslinking results in a plastic with a strong thermoset character. Using the glycidyl-functionalized combination described in this invention

Polymer dispersions and suitable crosslinkers, for example amidated amines, can also be strongly crosslinked polymers during the curing process

Systems with thermosetting properties arise. Therefore, in the following, the crosslink density is used as a measure of the effectiveness of the binding system. The crosslink density was determined by the determination of insolubles in thermally treated thin films of mixtures of dispersion and

Crosslinker determined. For this purpose, the procedure was analogous to that described in US-A-2008 / 0175,997. The film thickness of the substrates applied to plane-ground glass plates was in all cases 250 μm, the solvent used was N-dimethylformamide (DMF). For tempering the films a Mathis oven (type Mathis Labdryer LTE-S) was used. The tempering time was 10 minutes for the examples below. The temperatures to which the dried films were exposed over this period were varied. The

corresponding temperatures can be seen from the following table, in which the investigated inventive examples are shown.

The samples were prepared before coating the films as follows: to

Dispersions were added 3 wt .-% and 6 wt .-% (calculated on the solid content of the dispersion) of the corresponding crosslinker. In the listed here

Examples were worked with the product ^® Versamid 150 from Cognis. The amidated amine was used as obtained from the manufacturer and incorporated with slow stirring for 5 minutes in the dispersion. Subsequently, the pH of the mixture was determined, depending on the Dipsersion used and

Crosslinker amount between 8 and 9.5 lag

In the experiments, the dependence of the degree of crosslinking on the temperature was determined for the dispersions A and B. For the dispersion A, the dependence of the degree of crosslinking on the amount of crosslinker was additionally determined. The degree of crosslinking can be increased by higher temperature, longer

Temperierdauern and an optimized crosslinker concentration are positively influenced. As a comparative example, the amount of insoluble components from a film of the dispersion A and B without Vernetzerzusatz served. table

From the table it can be seen that by using the suitable crosslinker in the inventive examples over the comparative examples V1 and V2 (each without added crosslinker), the proportion of insoluble constituents and thus the crosslink density increases depending on the amount of crosslinker added and the temperature. Furthermore, it can also be seen that the presence of the carboxyl groups in dispersion B increases the crosslinking density, indicated by the increase in the percentage of insoluble constituents, particularly clearly when comparing experiment 5 with experiment 8.

Claims

 claims: 1. Mineral wool fiber mat bound with a binder containing a  Epoxide groups and / or functionalized with carboxyl groups  Emulsion copolymer and an amine and / or an amine derivative as a crosslinker. 2. mineral wool fiber mat according to claim 1, characterized in that functionalized with epoxy groups and / or with carboxyl groups  Emulsion copolymer, a polyvinyl ester, a polyacrylate or a  Polyalkenylaromat having copolymerized units which are derived from glycidyl esters of ethylenically unsaturated mono- or dicarboxylic acids, and / or having einpoly-merized units derived from ethylenically unsaturated mono- or dicarboxylic acids, their salts or anhydrides. 3. mineral wool fiber mat according to claim 2, characterized in that functionalized with epoxy groups and / or with carboxyl groups  Emulsion copolymer derived from alkenyl, preferably styrene, and / or esters of acrylic acid and / or methacrylic acid and having polymerized units derived from glycidyl esters of ethylenically unsaturated monocarboxylic acids, preferably of glycidyl esters of acrylic acid and / or methacrylic acid, and /or that  has polymerized units derived from ethylenically unsaturated mono- or dicarboxylic acids, their salts or anhydrides. 4. mineral wool fiber mat according to claim 2, characterized in that functionalized with epoxy groups and / or with carboxyl groups Emulsion copolymer is derived from esters of α, ß-ethylenically unsaturated C3-Ce mono- or dicarboxylic acids and has polymerized units which are derived from glycidyl esters of ethylenically unsaturated mono-carboxylic acids, preferably of glycidyl esters of acrylic acid and / or methacrylic acid, and / or having polymerized units other than ethylenically unsaturated mono- or dicarboxylic acids, their salts or anhydrides derived. 5. mineral wool fiber mat according to claim 2, characterized in that functionalized with epoxy groups and / or with carboxyl groups  Emulsion copolymer is derived from one or more vinyl esters and has copolymerized units which are derived from glycidyl esters of ethylenically unsaturated monocarboxylic acids, preferably of glycidyl esters of  Acrylic acid and / or methacrylic acid, derive, and / or the  having polymerized units derived from ethylenically unsaturated Mono- or dicarboxylic acids whose salts or anhydrides are derived, and / or which has copolymerized units derived from ethylenic  unsaturated mono- or dicarboxylic acids, their salts or anhydrides derived. 6. mineral wool fiber mat according to claim 5, characterized in that the functionalized with epoxy emulsion copolymer in addition to the structural units derived from one or more vinyl esters further structural units containing esters of α, ß-ethylenically unsaturated C3-C ₈ mono- or dicarboxylic acids with d -Ce alkanols, derived from α, ß-ethylenically unsaturated C ₃ -Cs mono- or dicarboxylic acids, olefins or a combination of two or more of these monomers. 7. mineral wool fiber mat according to claim 2, characterized in that the epoxide-functionalized emulsion copolymer is selected from the Group of copolymers derived from vinyl esters of saturated carboxylic acids and glycidyl esters of ethylenically unsaturated carboxylic acids, the  Copolymers derived from vinyl esters of saturated carboxylic acids, esters of acrylic acid and / or methacrylic acid and / or fumaric acid and / or maleic acid with C-i-Ce alkanols and glycidyl esters ethylenically unsaturated carboxylic acids, the copolymers derived from vinyl esters of saturated carboxylic acids, of ethylene, of ethylenically unsaturated carboxylic acids and and of glycidyl esters of ethylenically unsaturated carboxylic acids, the copolymers derived from vinyl esters, ethylene, esters of acrylic acid and / or the Methacrylic acid and / or fumaric acid and / or maleic acid with CC ₈ - alkanols, of ethylenically unsaturated carboxylic acids and of glycidyl esters of ethylenically unsaturated carboxylic acids, the copolymers derived from esters of acrylic acid and / or methacrylic acid, of ethylenically unsaturated Carboxylic acids and glycidyl esters of ethylenically unsaturated carboxylic acids, the copolymers derived from styrene with butadiene and / or esters of acrylic acid and / or methacrylic acid with d-Cs-alkanols, of ethylenically unsaturated carboxylic acids and glycidyl esters of ethylenically unsaturated carboxylic acids. Mineral wool fiber mat according to claim 7, characterized in that the polymer is a functionalized with epoxy groups polyvinyl ester containing at least 50 wt .-% vinyl acetate monomer units. Mineral wool fiber mat according to at least one of claims 1 to 8, characterized in that the binder is introduced in the form of an aqueous dispersion of the polymer. Mineral wool fiber mat according to at least one of claims 1 to 9, characterized in that the content of binder 0.1 to 10 wt.%, Preferably 0.5 to 5 wt.%, Is. Mineral wool fiber mat according to at least one of claims 1 to 10, characterized in that the crosslinker is selected from the group of mono- or polyamines, preferably aliphatic mono- or diamines or aromatic mono- or diamines. Mineral wool fiber mat according to at least one of claims 1 to 10, characterized in that the crosslinker is selected from the group of amides having one or more amide groups, in particular the polyaminoamides and most preferably the condensation products of unsaturated aliphatic acids with polyamines. 13. mineral wool fiber mat according to claim 12, characterized in that the crosslinker is selected from the group of polyaminoamides having an amine value according to ASTM D 2073 between 100 and 2000 mg KOH / g crosslinker, preferably between 250 and 1000 mg KOH / g crosslinker. 14. Mineral wool fiber mat according to claim 12, characterized in that the crosslinker used is neither alkoxylated nor hydroxyalkylated. 15. Mineral wool fiber mat according to at least one of claims 1 to 14, characterized in that the crosslinker is used in amounts of from 0.1 to 10% by weight, based on the binder, preferably between 1 and 10% by weight, in particular between 2 - 7 wt .-%. 16. A method for producing the mineral wool fiber mat according to claim 1 comprising the steps:  i) applying a crosslinkable composition comprising a with  Epoxide groups and / or functionalized with carboxyl groups  Emulsion copolymer and a crosslinker selected from the group of amines or amine derivatives, mineral wool fibers, and  j) solidifying the mineral wool fibers into a bonded mineral wool fiber mat, thereby crosslinking the binder. 17. The method according to claim 16, characterized in that the crosslinkable composition is applied in the form of an aqueous dispersion. 18. Use of the mineral wool fiber mat according to one of claims 1 to 15 as insulating material, in particular in particular for insulation, in particular thermal insulation of buildings and construction objects of all kinds, preferably for insulating roofs.