DE9212981U1 - Flame-retardant carpet - Google Patents

Description

HOECHST AKTIENGESELLSCHAFT HOE 92/F 311 G Dr. VA/rh

Description
Flame-retardant carpet

The present invention relates to a flame-retardant carpet made of a carrier material, a pile yarn incorporated therein and a backing finish, wherein the pile yarn consists of flame-retardant synthetic fibers, the carrier material consists of normal or flame-retardant synthetic fibers and the backing finish consists of a polyurethane.

Carpets in the sense of the present invention are textile fabrics manufactured by hand or machine using various manufacturing processes, which consist of a carrier - also called a base fabric - and a pile layer that is important for use and which are mainly used as floor coverings. The carrier of the carpets consists of a fleece-like, woven or knitted fabric-like fabric into which tufts or loops of pile yarns are integrated, which rise vertically on one side above the plane of the carrier material. Depending on the type of production and the resulting different ways of integrating the pile yarns into the carrier, different types of carpet are distinguished, e.g. knotted carpets, which can be manufactured manually or by machine, hand-woven or machine-woven carpets, knitted carpets, e.g. raschel or warp-knitted carpets and, especially when needle-punched nonwoven carriers are used, tufted carpets. What all of these carpet constructions have in common is that the pile threads are integrated into the carrier - the so-called carpet base - and penetrate it, i.e. that the pile yarns are intertwined with the yarns of the carrier in a regularity resulting from the manufacturing process. This integration of the pile yarns into the carrier does indeed lead to an anchoring of the pile material in the carrier, but this is usually not sufficient to guarantee the carpet the strength required for long-term use, in particular the so-called nap strength, which characterizes the resistance of the pile yarns to being pulled out of the carrier. It is therefore common to impregnate the above-mentioned carpet materials from the carrier side and/or to provide them with a back coating.

in order to adapt the performance characteristics of the carpet, in particular the nap strength, but also the feel of the fabric, to the needs of long-term use and the expectations of the user.

Carpets are increasingly being used for the interior fittings of objects that are subject to particularly high fire protection requirements. This includes the interior fittings of public facilities, hotels, especially from the 8th floor, public transport such as express trains, passenger ships and especially airplanes. Increasingly higher requirements are therefore being placed on the flame retardancy of carpets. These are not only imposed by consumers, but also by legislators and are only inadequately met by conventional carpets. In particular, carpets used for the interior fittings of airplanes must meet the requirements of the so-called Boeing test (Federal Register, Vol. 37, No. 37, (Title 14 - Aeronautics and Space) page 52), which go beyond the requirements of DIN 4102. These stricter provisions of the Boeing test are not met, for example, by polyamide carpets that meet the requirements for flame-retardant building materials, class B1, according to DIN 4102.

It is known that wool carpets that have been treated with a special flame-retardant finish pass the Boeing test. However, a serious disadvantage of these carpets is that

1. the finish is removed by shampooing, i.e. when cleaning the carpets the flammability increases again and

2. that the flame-retardant finish contributes a large proportion to the weight of the carpet. However, the increase in weight of the carpets due to the finish is to be seen as a serious disadvantage, especially for use in aircraft construction.

3. Wool finishing contains environmentally harmful heavy metal (zirconium) and leads to wastewater pollution and disposal problems.

A tufted carpet is known from German utility model no. 79 07 356, consisting of pile material, polyester tufting carrier and backing coating, whereby the fibers and/or threads of the polyester tufting carrier contain flame-retardant agents to achieve flame-retardant properties and the pile material and backing coating are preferably also made flame-retardant. The pile material, i.e. the pile yarn, can consist of, for example, flame-retardant polyester fibers, modacrylic fibers or wool. The flame-retardant polyester fibers used there contain chain links of the structural formula VIII condensed into the polyester chain of the polyester raw material as a flame-retardant agent.

0 0

T Il

O-P-R-C (VIM)

^R1 15

wherein R is a saturated, open-chain or cyclic alkylene, arylene or aralkylene radical and R ¹ is an alkyl radical having up to 6 C atoms, an aryl or aralkylene radical.

The back coating of this well-known tufted carpet is done by a primer coat with suitable well-known latices, which is immediately followed by either the lamination of a secondary backing or, after intermediate drying, a main coating, preferably a coating with a foamed latex. The coating agents used for this also contain flame-retardant or flame-proofing substances to the necessary extent. This well-known material is not only difficult to produce due to its multi-layer back structure, the high proportion of coating agent and the required amount of flame-proofing additives, but it also has a high surface weight and is critical to dispose of due to its zirconium content.

The present invention relates to a flame-retardant carpet with

high utility value due to excellent dimensional stability, high nap strength and advantageous fabric feel. Compared to previously used wool carpets, the carpet according to the invention has a longer service life due to its resistance to dirt and good cleaning properties and thus longer replacement times, a weight saving per m ² of approx. 0.5 to 0.7 kg/m ² compared to flame-retardant wool carpets, high abrasion resistance, high light fastness due to the use of appropriate dyes and dye guidelines, good wet and dry rub fastness. When replacing the carpet, there are no problems (toxicity) when disposing of the old carpet and in waste incineration plants, incineration is possible without critical smoke gas development.

The flame-retardant carpet according to the invention consists of a backing material, a pile yarn incorporated therein and a backing finish and is characterized in that the pile yarn consists of flame-retardant synthetic fibers, the backing material consists of normal or flame-retardant synthetic fibers and the backing finish consists of a polyurethane which is built up from the components of the formulas I to VII. -CO-AI-CO- (I)

-CO-A2-CO- (II)

(-0-) _n -A3-(C0-) _m (III)

-O-B1-O- (IV)

-O-B2-(O-) _p (V)

-NH-C1-NH- (VI)

-CO-NH-DI-NH-CO- (VII)

wherein

A1 is an aliphatic radical having 4 to 12, preferably 5-10, in particular 6-8, for example 6 C atoms,
A2 is a phenyl radical, preferably an m- or p-phenyl radical, A3 is an aliphatic radical having 2-10, preferably 4-8 C atoms, in which η and m each represent the numbers 1 or 2 and n+m = 3 or 4, preferably 3,

B1 is an aliphatic or cycloaliphatic radical with 2-10, preferably 4 - 8 C atoms,

B2 is an aliphatic or cycloaliphatic radical with 3 - 6, preferably an aliphatic radical with 3 or 4 C atoms, in which ρ represents the numbers 1 or 2, C1 is an aliphatic or mono- or dinuclear cycloaliphatic radical with 2 to 10 C atoms, preferably with 5-10 C atoms and D1 is an aliphatic or mono- or dinuclear cycloaliphatic radical with 5 to 36 C atoms, preferably with 6-15, in particular 10-14 C atoms,

the proportions of residues I to III, based on their total amount, are within the following limits:

I : 40 to 80 mol%, preferably 50 to 65 mol%

II : 10 to 35 mol%, preferably 15 to 30 mol% III : 0 to 25 mol%, preferably 10 to 20 mol%

the proportions of residues IV, V and VI, based on their total amount, are within the following limits:

IV : 65 to 95 mol-%, preferably 75 to 89 mol-%

V : 0 to 23 mol%, preferably 6 to 17 mol%

VI : 3 to 12 mol%, preferably 4.5 to 9 mol%

where the radicals of formulas I to V form polyester blocks with an average molecular weight of 400 to 6000

and the amount M^ ₁₀ in g-equivalents of the residues of formula VII contained in 100 g of the polyurethane resin is given by the formula

1.05 · DF < M(V ₁₀ < 1.5 · DF, preferably from the formula 1.1 ■ DF < M(V ₁₀ < 1.3 · DF, where

i=IU i=I

and M _(l) are the amounts in g-equivalents of the radicals of the formulas i = l, II, III, IV, V and VI contained in 100 g of the polyurethane resin.

Particularly preferred for the backing of the carpet according to the invention are polyurethane resins in which the proportions of residues I to III, based on their total amount, are within the following limits:

I : 50-60 mol-%

II : 20-30 mol-% III : 15-20 mol-%

The building blocks of formulas I - VII are derived from known monomer building blocks that are condensed into the polyurethane. Building blocks of formula I are derived, for example, from succinic acid, glutaric acid, adipic acid, azelaic acid, sebacic acid; Building blocks of formula II are derived, for example, from phthalic acid and in particular from isophthalic acid;

Structural groups of the formula III are derived, for example, from dihydroxymonocarboxylic acids such as α- or /i-methylglyceric acid, σ-propyl- or isopropylglyceric acid, o-ethyl-/?-methylglyceric acid, /?,K-dihydroxybutyric acid, σ,σ-bis-hydroxymethyl-propionic acid or hydroxydicarboxylic acids such as malic acid, α- and γ-methylmalic acid, α,β -dimethylmalic acid, /7-ethylmalic acid, α,/?-methyl-ethylmalic acid, α- isopropylmalic acid. Structural groups of the formula IV are derived, for example, from ethylene glycol, 1,4-butanediol, cyclohexane-dimethanol;

Components of formula V are derived, for example, from glycerin or pentaerythritol;

Structural groups of formula VI are derived, for example, from ethylenediamine, hexamethylenediamine, i-amino-S-aminomethyl-S.S.S-trimethyl-cyclohexane (isophoronediamine);

Components of formula VII are derived, for example, from 1,6-diisocyanatohexane, 3,5,5-trimethyl-isocyanato-3-isocyanatomethyl-cyclohexane, 4,4'-diisocyanatodicyclohexylmethane.

As already described above, the backing can be constructed as a basic warp weft construction in woven and raschel warp-knitted carpets, or it can be incorporated into the overall construction as a separate woven, spunbond or nonwoven product in tufted carpets and needle-punched constructions.

The weight proportions of pile material, backing and finishing agent of the flame-retardant carpet according to the invention are approximately 700 to 1300 g/m ² pile material, 80 to 250 g/m ² backing and 150 to 500 g/m ² , preferably 200 to 300 g/m ² polyurethane finishing. If the backing consists of a fabric or a fabric-like construction, it expediently has approximately 60 to 150 warp threads and 80 to 165 weft threads per 10 cm. Other backing constructions preferably have a corresponding thread density.

A carrier designed as a woven or knitted fabric consists of staple or continuous fiber yarns with yarn thicknesses of Nm 6 to Nm 20, preferably Nm 12 to Nm 14. Fibers with a titer of 6 to 17 dtex and a staple length of 80 to 150 mm are used for the yarns. For continuous yarns, the yarn thickness is in the same range as for staple fiber yarns. The individual titers of the continuous yarns are in the range of 3 to 30 dtex, preferably 5 to 15 dtex.

While the pile yarn of the flame-retardant carpet according to the invention always consists of flame-retardant modified synthetic fibers, preferably flame-retardant modified polyester fibers, the carrier can alternatively also consist of other, normally flammable thermoplastic synthetic fiber materials, such as unmodified polyethylene terephthalate or modified polyethylene terephthalate, for example polyethylene glycol-modified polyethylene terephthalate or polybutylene terephthalate.

The preferred normally flammable thermoplastic synthetic fiber material is unmodified polyethylene terephthalate.

The yarns used for the backing and also for the pile can contain, in addition to the polyester fibers mentioned, which may have been modified to be flame-resistant, non- or less flame-resistant fibers, as long as the required flame retardancy of the entire carpet is not impaired. Such accompanying fibers can be used in particular if they bring about additional advantageous properties of the carpet, such as an antistatic effect.

If the carrier of the flame-retardant carpet according to the invention consists of normal, non-flame-retardant modified, thermoplastic synthetic fibers, it expediently and preferably has the structure of a fleece, in particular a spunbond.
Particularly preferred are carpets according to the invention in which the yarns of the carrier also consist of flame-retardant polyesters.

The flame-retardant thermoplastic synthetic fiber material from which pile yarns and optionally also the yarns of the backing of the flame-retardant carpet according to the invention are made, also preferably consists of polyesters. In principle, all known types suitable for fiber production can be considered. Such suitable polyesters consist predominantly of building blocks that are derived from aromatic dicarboxylic acids and from

aliphatic diols. Common aromatic dicarboxylic acid building blocks are the divalent residues of benzenedicarboxylic acids, especially terephthalic acid and isophthalic acid; common diols have 2-4 C atoms, with ethylene glycol being particularly suitable.

The flame retardancy of the polyester material is achieved by adding halogen compounds, in particular bromine compounds, or, what is particularly advantageous, by phosphorus compounds that are condensed into the polyester chain.

Particularly preferred are flame-retardant pile or carrier yarns made of polyesters, in particular those mentioned above, which in the warp contain units of the formula

0 0

T l|

0-P-R-C

wherein R is alkylene or polymethylene having 2 to 6 C atoms or phenyl and R ^{1 is} alkyl having 1 to 6 C atoms, aryl or aralkyl. Preferably, in the formula IR is ethylene and R ¹ is methyl, ethyl, phenyl or ϳ-, m- or p-methyl-phenyl, in particular methyl.

The amount of flame-retardant agents of formula I added to the fiber raw material or fibers is 0.1 to 20% by weight, preferably 2.5 to 12% by weight, based on the total weight of the fibers or threads.

Particularly advantageous are carpets according to the invention whose fibers consist of a polyester material which consists of at least 85 mol% of polyethylene terephthalate. The remaining maximum of 15 mol% consists of the above-mentioned flame-retardant comonomers of formula VIII and optionally dicarboxylic acid units and glycol units which act as so-called modifiers and which allow the person skilled in the art to determine the physical

and chemical properties of the filaments produced. Examples of such dicarboxylic acid units are residues of isophthalic acid or of aliphatic dicarboxylic acids such as glutaric acid, adipic acid, sebacic acid; examples of diol residues with a modifying effect are residues of longer-chain diols, e.g. of propanediol or butanediol, of di- or tri-ethylene glycol or, if present in small quantities, of polyglycol with a molecular weight of approx. 500-2000.

The polyesters contained in the yarns of the carpets according to the invention preferably have a molecular weight corresponding to an intrinsic viscosity (IV), measured in a solution of 1 g of polymer in 100 ml of dichloroacetic acid at 25 ^° C, of 0.7 to 1.4.

A particularly preferred flame-retardant polyester, which can be used with particular advantage for producing the pile and optionally also the carrier yarns of the flame-retardant carpet according to the invention,

&phgr;
is a fibre material of the type Trevira CS from Hoechst AG.

Of particular importance for the quality of flame retardancy is the proportion of polyurethane finish in the weight per unit area of the flame retardant carpet according to the invention. Within the limits given above of 150 to 500 g/m ² , preferably 200 to 300 g/m ² , the amount of polyurethane applied is adjusted in each individual case so that the fibers can be thoroughly saturated and the spaces between the fibers filled in the plane of the backing. Applying more than this, which would result in the formation of a pure polyurethane layer, should be avoided. A pure polyurethane layer is understood to be a layer that has a plane parallel to the surface of the carpet that is not penetrated by fibers from the carpet backing.

The figure shows an example schematically the structure of a

carpet according to the invention with the carrier yarns (1), the pile yarns (2) wrapped around the carrier yarns and the polyurethane backing (3).

It is particularly surprising that the carpet according to the invention is extremely flame-retardant, even if the carrier does not consist of a flame-retardant modified synthetic fiber material, in particular flame-retardant modified polyester, and although the polyurethane used for the backing does not contain any flame-retardant additives or modifiers. This surprising effect of a flame-retardant finish using the polyurethane defined above also occurs on other textile fabrics.

A further subject of the present invention is therefore the use of the above-defined polyurethane for finishing flame-retardant textile materials made of thermoplastic synthetic fibers and an aqueous preparation for finishing flame-retardant textile materials made of thermoplastic synthetic fibers, consisting of 20 - 60% by weight of the above-defined polyurethane resin, 3-15% by weight of an aprotic, water-soluble, linear or cyclic carboxylic acid amide with a chain length of

underlying carboxylic acid of 1 to 5 C atoms and

37 - 77 wt% water.

Preferably, the preparation contains

30 - 55 wt.% of polyurethane resin,

5-10 wt.% of the aprotic, water-soluble, linear or cyclic

Carbonamide and

40 - 65 wt% water.

Examples of aprotic, linear or cyclic acid amides that can be contained in the above-mentioned preparations are dimethylformamide, dimethylacetamide and preferably N-methylpyrrolidone. In addition, the textile finishing agent according to the invention can also contain conventional additives, such as

Thickeners, anti-migration agents, emulsion stabilizers, fillers or pigments and the like in a proportion of up to 15, preferably up to, % by weight of the total mixture.

When using the polyurethane preparation according to the invention for finishing flame-retardant textile materials made of thermoplastic synthetic fibers, application quantities of 5 to 100 g/m ² , preferably 10 to 50 g/m ² , are expediently used.

The polyurethane resin used to strengthen the carpet backing of the carpet according to the invention represents, in chemical terms, a molecular network, the structure of which is schematically indicated in formula IX. The zigzag lines therein represent the above-mentioned polyester blocks, which have branches through building blocks of formula III or V at the points indicated by asterisks. The structural elements of the molecular network marked by X represent building blocks of formulas X to XII.

o-x-o-

/ss\r*-

X = -CO-NH-DI-NH-CO- (X)

or -CO-NH-DI-NH-CO-NH-CI-NH-CO-NH-DINH-CO- (Xl) or -CO-NH-D1-Y (XII)

where Y in non-condensed resins are groups of the formula -N=C=O, in condensed resins are essentially acid amide, urea, allophanate, biuret or acyl urea groups.

The present invention also relates to a method for producing the flame-retardant carpet according to the invention. In this method, an unconsolidated carpet is first produced from a carrier and pile yarns bound into it using one of the known knotting, weaving, warp knitting or tufting methods, dyed as usual and optionally sheared and then washed to remove any spin finishes. A polyurethane preparation is then applied to the back by spraying, brushing, doctoring or foaming, optionally with the addition of a foaming agent for preparation, but preferably by splashing using splash rollers, which has the following composition:

20 - 60 wt.% of the polyurethane resin defined above, 3-15 wt.% of an aprotic, water-soluble, linear or cyclic carboxylic acid amide with a chain length of the underlying carboxylic acid of 1 to 5 C atoms and 37 - 77 wt.% water.

Preferably, the preparation contains

30 - 55 wt.% of polyurethane resin,

5-10 wt.% of the aprotic, water-soluble, linear or cyclic carbonamide and

40 - 65 wt.% water.

The viscosity of the preparation is adjusted so that good penetration of the carpet backing is achieved. This goal can usually be achieved if, for example, for doctor blade application, the viscosity of the preparation at the working temperature is in the range of 5000 to 10000 mPa-s. The polymer preparation is normally applied at temperatures of +5 to +40 °C, preferably at room temperature.

After the backing has been applied, the carpet is dried at temperatures of 80 to 180°C, preferably 120 to 150 ^° C, and the polyurethane resin is completely condensed.

The polyurethane resin contained in the above preparation still contains free isocyanate groups in its macromolecule in a statistical distribution, which, after the carpet has been impregnated with this preparation, lead to further cross-linking, the so-called condensation, of the polyurethane resin during the subsequent drying at an elevated temperature, essentially with the formation of acid amide, urea, allophanate, biuret or acyl urea groups.

The following examples illustrate the production of a flame-retardant carpet according to the invention and the use of the polyurethane preparation for finishing a flame-retardant polyester fabric.

example 1

A tufted carpet consisting of a needle-bonded spunbond made of unmodified polyethylene terephthalate filaments with a basis weight of 120 g/m ² , into which a pile yarn made of flame-retardant polyethylene terephthalate

(Trevira CS from Hoechst AG) is needled in such a way that a pile height of 5.0 mm is achieved and the weight proportion of the pile fibers in the raw tufted material is g/m ² , is subjected to a thorough cleaning at 80 ⁰ C in a washing bath. In this process, all spinning preparations on the yarns are removed as completely as possible. The carpet is then dried and the back is treated on a scouring machine with 650 g/m ² of an aqueous dispersion (dry coating 195 g/m ² ), which has the following composition:

30 wt.% polyurethane resin,

5 wt.% N-methylpyrrolidone,
65% by weight water.

The polyurethane resin was prepared by reacting an OH-functional polyester of adipic acid and 1,6-hexanediol, which was modified by cocondensation with isophthalic acid and a trifunctional branching agent and had an average molecular weight of about 1300 and about 4 to 5 wt.% of a

Diaminocyclohexane derivative with an appropriate amount of 4,4-diisocyanatodicyclohexylmethane in the presence of about 2 to 3 wt.% triethylamine as catalyst and 10 to 20 wt.% N-methylpyrrolidone as solvent.
5

After finishing, the carpet is dried at 120 to 150 ⁰ C.

The carpet produced in this way not only meets the requirements for flame-retardant building materials class B1 according to DIN 4102, but also the requirements of the aircraft industry according to the Boeing test and the Airbus test ATS 1000.001 (described in "Airbus Industrie - Technical Specification, Fire-Smoke-Toxicity (FST), Test Specification).

Example 2

A fabric made of unmodified polyethylene terephthalate yarn in a broken twill weave with a basis weight of 200 g/m ² is thoroughly freed of spin finish in a washing liquor at 8O ⁰ C. The fabric is then soaked in an impregnation system with the polyurethane dispersion specified in Example 1 until it is saturated and then squeezed to a dispersion absorption of 15 to 15% by weight, based on the weight of the dry textile material. The fabric treated in this way is dried at 120 to 15O ⁰ C, and the polyurethane resin hardens in the process. A stiffened textile fabric is obtained which is ideally suited, for example, for the manufacture of slats for horizontal and vertical blinds.

The material not only meets the requirements for flame-retardant building materials class B1 according to DIN 4102, but also the requirements of the aircraft industry according to the Boeing test and the Airbus test ATS 1000.001.

Claims (13)

16 HOE 92/F 311 G Protection claims 1. Flame-retardant carpet consisting of a carrier material, a polygam incorporated therein and a backing, characterized in that the polygam consists of flame-retardant synthetic fibers, the carrier material is normal or flame-retardant synthetic fibers and the backing consists of a polyurethane which is made up of the residues of formulas I to VII. -CO-AI-CO- (I) -CO-A2-CO- (II) (-O-) _n -A3-(CO-) _m (III) -0-B1-0- (IV) -0-B2-(0-) _p (V) -NH-C1-NH- (VI) -CO-NH-DI-NH-CO- (VII) wherein A1 is an aliphatic radical having 4 to 12, preferably 5-10, in particular 6-8, for example 6 C atoms, en, A2 is a phenyl radical A3 is an aliphatic radical having 2-10, preferably 4-8 C atoms, in which η and m are each the numbers 1 or 2 and n+m is 3 or 4, preferably 3, B1 is an aliphatic or cycloaliphatic radical with 2-10, preferably 4-8 C atoms, B2 is an aliphatic or cycloaliphatic radical with 3 - 6, preferably an aliphatic radical with 3 or 4 C atoms, in which ρ represents the numbers 1 or, C1 is an aliphatic or mono- or dinuclear cycloaliphatic radical with 2 to 10 C atoms, preferably with 5-10 C atoms and D1 is an aliphatic or mono- or dinuclear cycloaliphatic radical with 5 to 36 C atoms, preferably with 6-15, in particular 10-14 C atoms. HuE 92/F 311 G 17 atoms, the proportions of residues I to III, based on their total amount, are within the following limits:
5 I : 40 to 80 mol-%, II : 10 to 35 mol%, III : 0 to 25 mol-%, the proportions of residues IV ₁ V and Vl, based on their total amount, be within the following limits: IV: 65 until 95 Mol-%, V: 0 until 23 Mol-%, Vl: 3 until 12 Mol-%, where the radicals of formulas I to V form polyester blocks with an average molecular weight of 400 to 6000 and the amount M _m in g-equivalents of the residues of formula VII contained in 100 g of the polyurethane resin is given by the formula 1.05 · DF < M(V ₁₀ < 1.5 · DF, preferably from the formula 1.1 ■ DF < M(Vi ₀ < 1.3 · DF, where J=UI DF = > i=IU i=I and M ₍₍₎ are the amounts in g-equivalents of the radicals of the formulas i = l, II, III, IV ₁ V and VI contained in 100 g of the polyurethane resin. HOE 92/F 311 G 18 2. Flame-retardant carpet according to claim 1, characterized in that the proportions of residues I to III, based on their total amount, are within the following limits: 5 I : 50 to 65 mol-% II : 15 to 30 mol-% III : 10 to 20 mol-% and the proportions of residues IV ₁ V and Vl, based on their total amount, are within the following limits: IV: 75 to 89 mol% V: 6 to 17 mol% Vl: 4.5 to 9 mol%. 3. Flame-retardant carpet according to at least one of claims 1 and 2, characterized in that the weight proportions of pile material, backing and finishing agent of the flame-retardant carpet according to the invention are approximately 700 to 1300 g/m ² pile material, 80 to 250 g/m ² backing and 150 to 500 g/m ² , preferably 200 to 500 g/m ² polyurethane finishing. 4. Flame-retardant carpet according to at least one of claims 1 to 3, characterized in that the carrier has a thread density corresponding to approximately 60 to 150 warp threads and 80 to weft threads per 10 cm. 5. Flame-retardant carpet according to at least one of claims 1 to 4, characterized in that the carrier consists of normal HOE 92/F 311 G 19 flammable thermoplastic synthetic fibre materials. 6. Flame-retardant carpet according to at least one of claims 1 to 5, characterized in that the carrier consists of normally flammable thermoplastic synthetic fibers and has the structure of a fleece, in particular a spunbond. 7. Flame-retardant carpet according to at least one of claims 1 to 4, characterized in that the yarns of the carrier also consist of flame-retardant synthetic fibers. 8. Flame-retardant carpet according to at least one of claims 1 to 7, characterized in that the flame-retardant nature of the synthetic fiber material is brought about by the addition of halogen compounds or phosphorus compounds. 9. Flame-retardant carpet according to at least one of claims 1 to 8, characterized in that the thermoplastic synthetic fibers are polyester fibers. 10. Flame-retardant carpet according to at least one of claims 1 to 9, characterized in that the flame-retardant polyesters in the chain contain units of the formula 0 0 T l| _O-p-R-C&mdash; ^R1 where R is alkylene or polymethylene with 2 to 6 C atoms or phenyl and R ¹ is alkyl with 1 to 6 C atoms, aryl or aralkyl, HOE 92/F 311 G 20 contain. 11. Use of a polyurethane composed of the residues of the formulas I to VII -CO-AI-CO- (I) -CO-A2-CO- (II) (-0-) _n -A3-(C0-) _m (III) -0-B1-0- (IV) -0-B2-(0-) _p (V) -NH-C1-NH- (VI) -CO-NH-DI-NH-CO- (VII) wherein A1 is an aliphatic radical having 4 to 12, preferably 5-10, in particular 6-8, for example 6 C atoms, en, A2 is a phenyl radical A3 is an aliphatic radical having 2-10, preferably 4-8 C atoms, wherein η and m each represent the numbers 1 or 2 and n + m is 3 or 4, preferably 3,
B1 is an aliphatic or cycloaliphatic radical having 2-10, preferably 4 - 8 C atoms, B2 is an aliphatic or cycloaliphatic radical having 3 - 6, preferably an aliphatic radical having 3 or 4 C atoms, in which &rgr; represents the numbers 1 or,
C1 is an aliphatic or mono- or dinuclear cycloaliphatic radical having 2 to 10 C atoms, preferably having 5-10 C atoms and D1 is an aliphatic or mono- or dinuclear cycloaliphatic radical having 5 to 36 C atoms, preferably having 6-15, in particular 10-14 C atoms. atoms,
30 the proportions of residues I to III, based on their total amount, are within the following limits: HÜt 92/F 311 G 21 I : 40 to 80 mol-%, II : 10 to 35 mol%, III : 0 to 25 mol-%, the proportions of residues IV, V and Vl, based on their total amount, are within the following limits: IV: 65 until 95 Mol-%, V: 0 until 23 Mol-%, Vl: 3 until 12 Mol-%, where the radicals of formulas I to V form polyester blocks with an average molecular weight of 400 to 6000 and the amount M _m in g-equivalents of the residues of formula VII contained in 100 g of the polyurethane resin is given by the formula 1.05 · DF < M(V ₁₀ < 1.5 ■ DF, preferably from the formula 1.1 · DF < M(V ₁₀ < 1.3 · DF, where DF i=IU i=I and M _(i) are the amounts in g-equivalents of the radicals of the formulas i = l, II, III, IV, V and VI contained in 100 g of the polyurethane resin, for the finishing of flame-retardant textile materials made of thermoplastic synthetic fibres. 12. Aqueous preparation for finishing flame-retardant textile materials made of thermoplastic synthetic fibres, consisting of HQE 92-/F 311 G 22 20 - 60 wt.% of a polyurethane resin,
3-15 wt.% of an aprotic, water-soluble, linear or cyclic carboxylic acid amide with a chain length of the underlying carboxylic acid of 1 to 5 C atoms and 37 - 77 wt.% water, which optionally also contains conventional additives such as thickeners, anti-migration agents, emulsion stabilizers, fillers or pigments in a proportion of up to 15% by weight of the total mixture, the polyurethane being composed of the radicals of the formulas I to VII -CO-AI-CO- (I) -CO-A2-CO- (II) (-O-) _n -A3-(CO-) _m (III) -O-B1-O- (IV) -0-B2-(0-)p (V) -NH-C1-NH- (VI) -CO-NH-DI-NH-CO- (VII) wherein A1 is an aliphatic radical having 4 to 12, preferably 5-10, in particular 6-8, for example 6 C atoms, en,, A2 is a phenyl radical A3 is an aliphatic radical having 2-10, preferably 4-8 C atoms, in which η and m each represent the numbers 1 or 2 and n + m is 3 or 4, preferably 3, B1 is an aliphatic or cycloaliphatic radical with 2-10, preferably 4 - 8 C atoms, B2 is an aliphatic or cycloaliphatic radical with 3 - 6, preferably an aliphatic radical with 3 or 4 C atoms, in which ρ represents the numbers 1 or, C1 is an aliphatic or mono- or dinuclear cycloaliphatic radical with 2 to 10 C atoms, preferably with 5-10 C atoms and HOE 32/r 311 G 23 D1 is an aliphatic or mono- or dinuclear cycloaliphatic radical with 5 to 36 C atoms, preferably with 6-15, in particular 10-14 C atoms, the proportions of residues I to III, based on their total amount, are within the following limits: I: 40 up to 80 Mol-%, The : 10 up to 35 Mol-%, III: 0 up to 25 Mol-%, the proportions of residues IV, V and VI, based on their total amount, are within the following limits: IV: 65 until 95 Mol-%, V: 0 until 23 Mol-%, Vl: 3 until 12 Mol-%, where the radicals of formulas I to V form polyester blocks with an average molecular weight of 400 to 6000 and the amount M^ ₁₀ in g-equivalents of the residues of formula VII contained in 100 g of the polyurethane resin is given by the formula 1.05 · DF < M(V ₁₁ ) < 1.5 · DF, preferably from the formula 1.1 ■ DF < M(V ₁₀ < 1.3 · DF, where i=UI J=II I DF = ]Γμ _(�Pgr; - yirt(i 92/F 311 G 24 and M ₍₁₎ are the amounts in g-equivalents of the radicals of the formulas i = l, II, III, IV, V and VI contained in 10O g of the polyurethane resin. 13. Aqueous preparation according to claim 12, characterized in that the preparation 30 - 55 wt.% of the polyurethane resin, 5-10 wt.% of the aprotic, water-soluble, linear or cyclic carbonamide and 40-65 wt.% water.