DE4138572A1 - Fibre-reinforced thermoplastic moulding compsn. - contg. polyester and imidised polymer, used for making fibre, film or moulding with good surface quality - Google Patents

Abstract

Thermoplastic moulding compsn. contains 35-92 (wt.% thermoplastic polymer (I), 5-35% polymer (II) contg. imide gps. and 3035% fibrous reinforcement (III). The compsn. pref. contains 40-80% (I), 10-35% (II) and 10-30% (III). USE/ADVANTAGE - The compsn. is used for making fibres, films and mouldings, (claimed). It has good mechanical properties, very good surface quality and high scratch resistance. Compsns. are useful e.g. in the automobile and building fields and for making housings for electrical equipment.

Description

The present invention relates to thermoplastic molding materials sen, containing as essential components

• A) 35 to 92 wt .-% of a thermoplastic polyester
• B) 5 to 35% by weight of a polymer containing imide groups and
• C) 3 to 35% by weight of fibrous reinforcing agent.

In addition, the invention relates to the use of this ther plastic molding compounds for the production of fibers, foils and moldings and the moldings obtainable here from the thermoplastic molding compounds.

There are many different types of thermoplastic polyesters Chen areas used, e.g. B. in the automotive sector provision of housings for electrical appliances or in the construction sector.

In EP-A 2 16 505 blends of thermoplastic Po described lyesters and polyimides, their mechanical egg properties, however, are in need of improvement.

From EP-A 3 68 163 unreinforced mixtures of ther plastic polyesters, polycarbonates and methacrylimide containing thermoplastic polymers known, the upper surface quality and hardness are unsatisfactory.

The present invention was therefore based on the object To provide polyester molding compounds, the good me have mechanical properties, in particular high stiffness ability and good surface quality, especially high Scratch resistance.  

Accordingly, the thermoplastic defined at the outset Molding compounds found. In addition, their use for Manufacture of fibers, films and moldings as well as the moldings obtainable from the thermoplastic Molding compounds found.

The thermopla according to the invention contain as component A) tical molding compositions 35 to 92 wt .-%, preferably 40 to 80 wt .-%, in particular 45 to 65 wt .-% of a thermoplastic polyester.

Such polyesters are known per se. Preferably who uses the polyester, which contain an aromatic ring in the main chain. The aromatic ring can also be substituted, e.g. B. by halogens such as chlorine and bromine and / or by C ₁ - to C ₄ alkyl groups, such as. B. methyl, ethyl, i- or n-propyl and i- or n- or t-butyl groups.

The polyester can be produced by reaction of Dicar bonic acids, their esters or other ester-forming derivatives with dihydroxy compounds in a manner known per se gene.

Examples of suitable dicarboxylic acids are aliphatic and aromatic dicarboxylic acids, which can also be used as a mixture. For example, naphthalenedicarboxylic acids, terephthalic acids, isophthalic acids, adipic acid, azelaic acid, sebacic acid, dodecanedioic acid, cyclohexanedicarboxylic acids and C ₃₆ dimer fatty acids, mixtures of these carboxylic acids and ester-forming derivatives thereof are mentioned.

The dihydroxy compounds used are preferably diols having 2 to 10 carbon atoms, particularly preferably ethylene glycol, 1,3-propanediol, 1,4-butanediol, 1,4-butenediol and 1,6-hexanediol; however, 1,4-hexanediol, 1,4-cyclohexane diol, 1,4-di- (hydroxymethyl) cyclohexane, bisphenol A, neopentylglycol, 2-hexenediol, 3-hexenediol, 4-octenediol, 10-eicosen- 1,20-diol, the hydrogenation product of a C ₃₆ dimer fatty acid, mixtures of these diols and ester-forming derivatives thereof are used.

Polyester from terephthalic acid or naphthalenedicarboxylic acids and a C ₂ - to C ₆ -diol component, e.g. B. polyethylene terephthalate, polyethylene naphthalate, polypropylene terephthalate or polybutylene terephthalate or mixtures thereof are particularly preferred.

If mixtures of different polyesters are used, so the mixing ratios can vary widely ken. Mixtures of polybutylene terephthalate are preferred and polyethylene terephthalate, the weight ratio is preferably in the range from 3: 1 to 6: 1.

Furthermore, it has proven to be particularly preferred if Polybutylene terephthalates with a viscosity number of min at least 50 ml / g, measured on a 0.5 wt .-% solution in Phenol / o-dichlorobenzene (weight ratio 1: 1) at 25 ° C, be used.

Of course, polyester block copolymers such as Copolyetherester can be used. Such products are known per se and in the literature, e.g. B. in the US A 36 51 014. Corresponding are also in the trade Products available, e.g. B. Hytrel® (Du Pont).

The imide group-containing polymer used as component B) is in amounts of 5 to 35 wt .-%, preferably from 10 to 35 wt .-%, in particular from 20 to 30 wt .-% used.

Polymers containing imide groups have proven suitable sen that are built up from

• b ₁ ) 10 to 100% by weight of units of the general formula I in the
  R ¹ , R ^{2 are} hydrogen atoms, C ₁ to C ₄ alkyl or C ₆ to C ₁₈ aryl groups and
  R ^{3 is} hydrogen atoms, C ₁ to C ₈ alkyl, C ₅ to C ₁₂ cycloalkyl, C ₆ to C ₁₈ aryl or arylalkyl groups having 7 to 12 C atoms,
• b ₂ ) 0 to 90% by weight of ethylenically unsaturated monomers.

Of the units of the general formula I, preference is given to those in which R ¹ and R ^{2 are} identical and in particular represent hydrogen atoms or methyl groups. This corresponds to polymers which are essentially composed of monomer units of methacrylic acid esters and / or acrylic acid esters and are subsequently imidized.

Preferred R ³ radicals are hydrogen atoms, C ₁ -C ₄ -alkyl groups, in particular methyl or a cyclohexyl group. Preferred aryl radicals are phenyl and those which contain 1 to 4 methylene groups as a bridge between the nitrogen atom and the aromatic radical, in particular benzyl.

Other ethylenically unsaturated monomers such as acrylic acid, (meth) acrylic acid, maleic anhydride, itaconic anhydride, (meth) acrylonitrile, styrene and its nucleus-substituted alkyl derivatives, ethylene, propylene and butadiene can be present as component b ₂ ). The polymers to be imidized can be single-stage polymers and / or multi-stage polymers, with the latter having to contain the outer stage groups which can be imidized.

In general, the polymers contain at least 24% by weight, preferably at least 50% by weight, especially before Adds more than 80 wt .-%, and very particularly preferably 95 to 100% by weight of the acrylic and / or methacrylic acid esters. Before are added esters, in which the ester content 1 to 20 carbons contains atoms. For economic reasons and because Methyl methacrylate is particularly easy to access preferred. Poly are also particularly useful merisate from monomer systems, the at least 80 wt .-% Me contain methyl methacrylate.  

The average molecular weights (weight average) of the polymers which are suitable as starting materials are generally determined in accordance with DIN 7745 Part 1. The viscosity number VZ of PMMA molding compositions is usually measured in accordance with DIN 7745, part 2 (2.6 g / l in CHCl ₃ at 25 ° C.) and is from 30 to 100 ml / g, preferably from 50 to 80 ml / g .

Dry or enamel are often used as starting materials blends of single-stage polymers and multi-stage Polymers that improve the impact resistance nen, used. In such cases, the single-stage Polymer and primarily the outer stage of the more stage polymerized imidized. Such blends are better tolerated than the blends of imidized one stage polymers with the same multi-stage polymer risat, especially if the latter is not imidi is. Blends of a one-stage are preferred Acrylic polymers with 10 to 60 wt .-% of a multi-stage Polymer.

The acrylic polymers can be in any form. however, they are usually in the form of powders or granules laten used, where they can be uncolored or colored. However, it should be noted that in some cases the Imidization impair the dyes or pigments, so that in these cases the coloring agent only after the Imidization should be added.

The polymers B) with imide groups can be prepared in accordance with the processes described in US Pat. Nos. 4,246,374 and 2,334,726. A polymer-analogous reaction with suitable primary amines R ³ NH ₂ or ammonia with, for example, polymethyl methacrylate to form polymethacrylimides generally takes place here:

Because of their easy access, ammonia and methylamine are the most preferred compounds of formula R ³ NH ₂ , but other amines can also be used with good success. Other suitable amines are, for example, ethyl, n-propyl, n-butyl, heptyl, hexyl, octyl, nonyl, decyl, dodecyl, hexadecyl, octadecyl, isobutyl, sec.-butyl , t-butyl, isopropyl, 2-ethylhexyl, phenethyl, allyl, benzyl, para-chlorobenzyl and dimethoxyphenethyl amine; also alanine, glycine, 3'-aminoacetophenone, 2-aminoanthraquinone and p-aminobenzoic acid and alkyl-substituted cyclohexylamines such as trimethylcyclohexylamine.

Other suitable amines are cyclohexylamine, 2-amino-4,6-di methylpyridine, 3-aminophthalimide, 2-aminopyrimidine, 2-amino thiazole, 5-amino-1-H-tetrazole, aniline, bromoaniline, dibromo aniline, tribromaniline, chloraniline, dichloroaniline, trichlo ranilin, p-phenetidine and p-toluidine.

The content of imide groups of component B) (imidization degree) is generally 0.1 to 100, preferably from 50 up to 95% and can be calculated according to the following equation:

In the case of a degree of imidization of 100%, the Glutarimide structure is essentially the recurring one unit in the polymer chain.

The thermopla according to the invention contain as component C) tical molding compositions 3 to 35 wt .-%, preferably 10 to 30 wt .-%, in particular 15 to 25 wt .-% fibrous Ver tonic.

Fibrous reinforcing agents include glass fibers, Carbon fibers, aramid fibers, potassium titanate fibers and fibrous silicates called wollastonite.  

When using glass fibers, these can be improved Compatibility with a size and an adhesion promoter be equipped.

Glass fibers are preferably used.

In general, the glass fibers used have a through knife in the range of 6 to 20 µm. The familiarization can both in the form of short glass fibers and in the form of end loose strands (rovings). In the finished injection molded part the average length of the glass fibers is preferably in the loading ranging from 0.08 to 5 mm.

In addition, the thermoplastic molding compounds 0 to 40 wt .-%, preferably 0 to Contain 30% by weight of particulate fillers.

The particulate fillers are only representative here tend glass balls, particulate wollastonite, quartz flour, Boron nitride, kaolin, calcium carbonate, mica, magnesium carbo called nat and titanium dioxide, of which wollastonite, titanium dioxide and kaolin are generally preferred.

Furthermore, the molding compositions according to the invention can be conventional Contain additives and processing aids. Their Share is generally 0 to 30% by weight, preferably 0 to 10% by weight.

Common additives are, for example, UV stabilizers, Lubricants and mold release agents, colorants, dyes and Pigments and plasticizers as well as flame retardants.

Examples of UV stabilizers are various substances acted resorcinols, salicylates, benzotriazoles and benzopheno ne, the generally in amounts up to 2.0 wt .-% be set.

Lubricants and mold release agents, which are usually in quantities up to are added to 1% by weight of the thermoplastic composition, are stearic acid, stearyl alcohol, stearic acid alkyl esters and amides and esters of pentaerythritol with long-chain Fatty acids.  

Flame retardants can generally be used in amounts up to 20% by weight can be contained in the molding compositions. Coming here for all flame retardant additives known for polyester in Be traditional, but preferred are ethylene-bis-tetrabromophthal imide and oligomeric tetrabromobisphenol A carbonates.

Furthermore, the thermoplastic according to the invention Molding compositions 0 to 60, preferably 0 to 40 wt .-% of one impact modifying polymers (hereinafter also as rubber-elastic polymer or elastomer) contain.

Preferred types of such elastomers are the so-called. Ethylene propylene (EPM) or ethylene propylene Diene (EPDM) rubbers.

EPM rubbers generally have practically no doubles bonds more, while EPDM rubbers 1 to 20 double bind dungen / 100 C atoms.

Examples of diene monomers for EPDM rubbers are conjugated dienes such as isoprene and butadiene, non-konju gated dienes with 5 to 25 carbon atoms such as penta-1,4-diene, Hexa-1,4-diene, hexa-1,5-diene, 2,5-dimethylhexa-1,5-diene and Octa-1,4-diene, cyclic dienes such as cyclopentadiene, cyclo hexadienes, cyclooctadienes and dicyclopentadiene and Alkenylnorbornenes such as 5-ethylidene-2-norbornene, 5-buty liden-2-norbornene, 2-methallyl-5-norbornene, 2-isopro penyl-5-norbornene and tricyclodienes such as 3-methyl-tri cyc1o (5.2.1.0.2.6) -3,8-decadiene or their mixtures ge called. Hexa-1,5-diene-5-ethylidene-norbornene are preferred and dicyclopentadiene. The diene content of EPDM rubbers be preferably carries 0.5 to 50, in particular 1 to 8% by weight, based on the total weight of the rubber.

EPM or EPDM rubbers can preferably also with reak be grafted carboxylic acids or their derivatives. Here be z. B. acrylic acid, methacrylic acid and their derivatives, e.g. B. glycidyl (meth) acrylate, and maleic anhydride called.  

Another group of preferred rubbers are copolymers of ethylene with acrylic acid and / or methacrylic acid and / or the esters of these acids. In addition, the rubbers nor dicarboxylic acids such as maleic acid and fumaric acid or Derivatives of these acids, e.g. B. esters and anhydrides, and / or Monomers containing epoxy groups. This dicar bonic acid derivatives or monomers containing epoxy groups are preferably made by adding dicarboxylic acid or Monomers containing epoxy groups of the general formulas I or II or III or IV to the monomer mixture in the chew chuk installed

where R ⁴ to R ^{12 represent} hydrogen or alkyl groups having 1 to 6 carbon atoms and m is an integer from 0 to 20, g is an integer from 0 to 10 and p is an integer from 0 to 5.

The radicals R ⁴ to R ^{12 are} preferably hydrogen, where m is 0 or 1 and g is 1. The corresponding compounds are maleic acid, fumaric acid, maleic anhydride, allyl glycidyl ether and vinyl glycidyl ether.

Preferred compounds of the formulas II, III and V are Maleic acid, maleic anhydride and epoxy groups included end esters of acrylic acid and / or methacrylic acid, such as Glycidyl acrylate, glycidyl methacrylate and the esters with tertiary alcohols, such as t-butyl acrylate. The latter point Although there are no free carboxyl groups, their ver but keep close to the free acids and are therefore considered Monomers with latent carboxyl groups.

The copolymers advantageously consist of 50 to 98% by weight Ethylene, mono containing 0.1 to 20% by weight of epoxy groups mer and / or methacrylic acid and / or acid anhydride groups containing monomers and the remaining amount of (Meth) acrylic acid esters.

Copolymers of are particularly preferred
50 to 98, in particular 55 to 95% by weight of ethylene,
0.1 to 40, in particular 0.3 to 20% by weight of glycidyl acrylate and / or glycidyl methacrylate, (meth) acrylic acid and / or maleic anhydride, and
1 to 45, in particular 10 to 40% by weight of n-butyl acrylate and / or 2-ethylhexyl acrylate.

Further preferred esters of acrylic and / or methacrylic acid are the methyl, ethyl, propyl and i- or t-butyl esters.

In addition, vinyl esters and vinyl ethers can also be used as comonomers be used.

The ethylene copolymers described above can according to known methods are preferably produced by statistical copolymerization under high pressure and elevated temperature. Appropriate procedures are general known.

Preferred elastomers are also emulsion polymers whose Manufacturing z. B. Blackley in the monograph "Emulsion Polymerization "is described. The emulsions that can be used gates and catalogs are known per se.  

In principle, homogeneous elastomers or those with a shell structure can be used. The shell-like structure is the order of addition of individual monomers determined; also the morphology of the poly meren is influenced by this order of addition.

The following are only representative as monomers for the manufacturers development of the rubber part of the elastomers acrylates such. B. n-butyl acrylate and 2-ethylhexyl acrylate, corresponding meth acrylates, butadiene and isoprene and mixtures thereof called. These monomers can be combined with other monomers such as e.g. B. styrene, acrylonitrile, vinyl ethers and other acrylates or methacrylates such as methyl methacrylate, methyl acrylate, Ethyl acrylate and propyl acrylate are copolymerized.

The soft or rubber phase (with a glass transition system temperature of below 0 ° C) the elastomer can form the core outer shell or a middle shell (with elastomers with represent more than two-shell structure); for multi-layer Elastomers can also have several shells made of one rubber phase exist.

Are one or more hard in addition to the rubber phase components (with glass transition temperatures of more than 20 ° C) involved in the construction of the elastomer, so these generally by polymerizing styrene, acrylonitrile, Methacrylonitrile, α-methylstyrene, p-methylstyrene, acrylic acid esters and methacrylic acid esters such as methyl acrylate, Ethyl acrylate and methyl methacrylate as the main monomers poses. In addition, smaller shares in other comonomers can be used.

In some cases it has proven to be beneficial provides to use emulsion polymers that are on the upper have surface reactive groups. Such groups are e.g. B. epoxy, carboxyl, latent carboxyl, amino or amide groups as well as functional groups, by sharing of monomers of the general formula  

can be introduced, where the substituents can have the following meanings:
R ^{13 is} hydrogen or a C ₁ to C ₄ alkyl group,
R ^{14 is} hydrogen, a C ₁ to C ₈ alkyl group or an aryl group, in particular phenyl,
R ^{15 is} hydrogen, a C ₁ to C ₁₀ alkyl, a C ₆ to C ₁₂ aryl group or OR ¹⁶
R ^{16 is} a C ₁ to C ₈ alkyl or C ₆ to C ₁₂ aryl group, which can optionally be substituted with O- or N-containing groups,
X is a chemical bond, a C ₁ to C ₁₀ alkylene or C ₆ -C ₁₂ arylene group or

Y OZ- or NH-Z and
Z is a C ₁ to C ₁₀ alkylene or C ₆ to C ₁₂ arylene group.

The graft monomers described in EP-A 2 08 187 are for the introduction of reactive groups on the surface suitable.

Acrylamide and methacrylamide are further examples and substituted esters of acrylic acid or methacrylic acid such as (N-t-butylamino) ethyl methacrylate, (N, N-dimethylami no) ethyl acrylate, (N, N-dimethylamino) methyl acrylate and (N, N- Diethylamino) called ethyl acrylate.  

Furthermore, the particles of the rubber phase can also ver be networked. Monomers which act as crosslinkers are examples as buta-1,3-diene, divinylbenzene, diallyl phthalate and Dihydrodicyclopentadienyl acrylate and those in the Compounds described in EP-A 50 265.

So-called graft-crosslinking monomers can also be used (graft-linking monomers) are used, d. H. Monomers with two or more polymerizable double bonds, which at polymerization at different rates react. Such connections are preferably used det, in which at least one reactive group with about same speed as the other polymeric monomers while the other reactive group (or reactive Groups) e.g. B. polymerized significantly slower (polymerize). The different polymerization dizziness brings a certain proportion of unsown double bonds in the rubber. Will then ß another phase on such a rubber grafting, so the double present in the rubber react bonds at least partially with the graft monomers Formation of chemical bonds, d. H. the grafted on Phase is at least partly related to chemical bonds linked to the graft base.

Examples of such graft-crosslinking monomers are allyl group-containing monomers, in particular allyl esters of ethylenically unsaturated carboxylic acids such as allyl acrylate, Allyl methacrylate, diallyl maleate, diallyl fumarate, diallyl itaconate or the corresponding monoallyl compounds of these dicarboxylic acids. There are also many further suitable graft-crosslinking monomers; for closer Details can be found here, for example, in US Pat. No. 4,148,846 referred.

In general, the proportion of this crosslinking mono up to 5% of the impact-modifying polymer % By weight, preferably not more than 3% by weight, based on the impact-modifying polymers.  

Below are some preferred emulsion polymers listed. First of all, here are graft polymers with a To name the core and at least one outer shell, the fol have the following structure:

Instead of graft polymers with a multi-layer Structure can also be homogeneous, i.e. H. single-shell elastomers Buta-1,3-diene, isoprene and n-butyl acrylate or their copoly be used. These products can also by Use of crosslinking monomers or monomers reactive groups are produced.

Examples of preferred emulsion polymers are n-butyl acrylate / (meth) acrylic acid copolymers, n-butyl acrylate / gly cidyl acrylate or n-butyl acrylate / glycidyl methacrylate copo polymers, graft polymers with an inner core made of n-Bu tylacrylate or butadiene-based and an outer shell from the above copolymers and copolymers of Ethylene with comonomers that provide reactive groups.  

The elastomers described can also übli after other Chen procedures, e.g. B. by suspension polymerization, Herge be put.

Further preferred rubbers are polyurethanes, as in the EP-A 1 15 846, EP-A 1 15 847, EP-A 1 16 456, EP-A 1 17 664 and EP-A 3 27 384. Are commercially available such products z. B. under the names Desmopan® (Bayer AG) or Elastollan® (Elastogran Polyurethane GmbH) available.

Silicone rubbers, as in DE-A 37 25 576, the EP-A 2 35 690, DE-A 38 00 603 and EP-A 3 19 290 be are also preferred.

Of course, mixtures of the above listed rubber types are used.

The thermoplastic molding compositions according to the invention can be prepared by methods known per se, in which the starting components in conventional mixing devices such as screw extruders, Brabender mills or Banbury mills mixes and then extruded. After extrusion can the extrudate is cooled and crushed. It can also individual components are premixed and then the remaining starting materials individually and / or also ge mixes can be added. The mixing temperatures are in usually at 230 to 290 ° C.

Draw the thermoplastic molding compositions according to the invention are characterized by good mechanical properties very good surface quality and high scratch resistance. They are suitable for the production of fibers, foils and shapes bodies.

Examples

The following components were used:

A1: A polybutylene terephthalate with an average molecular weight _n (number average) of 25,000 and a viscosity number of 125 ml / g (measured on a 0.5% by weight solution in phenol / o-dichlorobenzene (weight ratio 1: 1 )) (Ultradur® B 4500 from BASF AG).

A2: A polyethylene terephthalate with an average molecular weight _n (number average) of 30,000 and a viscosity number of 73 ml / g (measured on a 0.5% by weight solution in phenol / o-dichlorobenzene (weight ratio 1: 1) ) (Ultralen® SP 3700 S from BASF AG).

B: A polycyclohexyl methacrylimide with an imidization degree of 60%, manufactured analogously to that in the US A 42 46 374 described method.

C: chopped glass fibers with a diameter of 10 µm and a fiber length of 4.5 mm.

K: An acrylate rubber made from 50% by weight of a styrene acrylic tril copolymer (65% by weight styrene, 35% by weight acrylic nitrile) and 50 wt .-% of a graft rubber, which 60% by weight of crosslinked n-butyl acrylate (core) and 40% by weight Styrene-acrylonitrile polymer (shell; 75% by weight styrene, 25 wt .-% acrylonitrile) is built up.

Examples 1 and 2 Production of thermoplastic molding compounds

The starting components were on a twin-screw extruder (ZSK 53 from Werner & Pfleiderer) mixed at 260 ° C (25 kg / h Throughput, 250 rpm), extruded, cooled, granulated, ge dries and then ver at 260 ° C to test specimens splashes.

Comparative Examples V1 to V4

The procedure was as in Examples 1 and 2, however without the addition of a polymer containing imide groups and / or without the addition of a fibrous reinforcing agent.

The compositions and properties of the thermoplastic molding compounds are shown in the table.  

The surface quality was determined visually. The The scratch resistance was determined using a rub value measuring device. For this, after placing the test specimen pers on a measuring table a measuring pin with constant Ge speed (8 mm / sec) and continuously increasing Contact force moved over the surface of the test specimen (measuring path 40 mm). The result is the frictional force.

The modulus of elasticity (modulus of elasticity) was determined in accordance with DIN 53 457, the notched impact strength a _{k in} accordance with DIN 53 453 at 23 ° C.

table

Claims (5)

1. Thermoplastic molding compositions containing as essential components

• A) 35 to 92 wt .-% of a thermoplastic polyester
• B) 5 to 35% by weight of a polymer containing imide groups and
• C) 3 to 35% by weight of fibrous reinforcing agent.

2. Thermoplastic molding compositions according to claim 1, characterized in that the imide group-containing polymer B) is composed of

• b ₁ ) 10 to 100% by weight of units of the general formula I in the
  R ¹ , R ^{2 are} hydrogen atoms, C ₁ to C ₄ alkyl or C ₆ to C ₁₈ aryl groups and
  R ^{3 represents} hydrogen atoms, C ₁ - to C ₈ -alkyl, C ₅ - to C ₁₂ -cycloalkyl, C ₆ - to C ₁₈ -aryl or arylal alkyl groups with 7 to 12 C atoms,
• b ₂ ) 0 to 90% by weight of ethylenically unsaturated monomers.

3. Thermoplastic molding compositions according to claims 1 to 2, characterized in that they component A) in an amount of 40 to 80% by weight, component B) in an amount of 10 to 35% by weight and component C) in an amount of 10 to 30% by weight contain. 4. Use of the thermoplastic molding compositions according to Claims 1 to 3 for the production of fibers, films and moldings. 5. Moldings, available from the thermoplastic mold masses according to claims 1 to 3 as an essential com component.