WO2001055255A1 - Stabilized fiber-reinforced molding compounds for use in motor vehicle interiors - Google Patents

Abstract

The invention relates to stabilized fiber-reinforced thermoplastic molding compounds, to the molded parts, composite materials and laminates produced on the basis thereof and to the use of the molding compounds for producing molded parts, composite materials and laminates. The invention further relates to the use of a stabilizer for adjusting the properties of molding compounds, molded parts, composite materials and laminates with a thermoplastic molding compound that contains, based on the sum of components A to E and optionally F and G that adds up to 100 wt.- %, a) 10 to 96.9 wt.- % of at least one aromatic polyester as component A, b) 1 to 50 wt.- % of at least one particulate graft copolymer with a glass transition temperature of the soft phase below 0 DEG C and average particle size of 50 to 1000 nm as component B, c) 1 to 50 wt.- % of at least one copolymer consisting of the monomers c1) 50 to 90 wt.- % of at least on vinyl-aromatic monomer as component C1 and c2) 10 to 50 wt.- % acrylnitril and/or methacrynitril as component C2, as component C, d) 1 to 50 wt.- % fibers as component D, and e) 0.1 to 2 wt.- % of a stabilizer as component E. Said stabilizer consists of at least one main stabilizer and optionally at least one co-stabilizer, said main stabilizer being a hydrocarbon optionally containing N, O or S or at least two of them as a heteroatom. Said hydrocarbon is bound, via " &tilde& ", with at least one sterically hindered, optionally deprotonated phenol of the general formula (I), wherein R<1> = tertiary butyl, cyclopentyl or cyclohexyl, and R<2> = H, C1 to C10 hydrocarbon, and has a molecular weight in the range of 250 to 2500 g/mol. The co-stabilizer consists of at least one phosphorus with 3 hydrocarbon rests bound thereto, wherein at least one of the rests is bound via an oxygen atom, and has molecular weight in the range of 91 to 1500 g/mol. The inventive thermoplastic material further contains f) 0 to 25 wt.- % of other acceptable polymers that can be mixed with components A and/or C to give a homogeneous mixture or that can be dispersed therein, as component F, g) 0 to 10 wt.- % usual additives such as UV stabilizers, antioxidants, lubricants and mold release agents as component G.

Description

 Stabilized fiber-reinforced thermoplastic molding compounds for automotive interior applications

The invention relates to stabilized fiber-reinforced thermoplastic molding compositions, molded parts, composites and laminates thereof, and the use of the molding compositions for producing the molded parts, composites and laminates, and the use of a stabilizer for adjusting properties in molding compositions, molded parts, composites and laminates.

Molded parts made of polymeric materials that are used in the interior of motor vehicles must meet high requirements with regard to their mechanical properties, their surface properties, their aging behavior and their olfactory behavior. Various polymeric materials have hitherto been used for the production of molded parts for automotive interior applications.

A material used is glass fiber reinforced ABS PC (polymer blend made of acrylonitrile / butadiene / styrene copolymer and polycarbonate). However, this material has only insufficient UV resistance, poor heat aging behavior (toughness and elongation at break after heat storage), unfavorable surface properties and, in particular, poor odor behavior. Odor behavior is understood to mean the tendency of materials to emit volatile components that have a perceptible odor after a fixed period of temperature and climate storage.

Glass-fiber-reinforced, tough-modified SMA (styrene-aleic anhydride copolymer) is used as another material. SMA also has inadequate surface properties, poor flowability and poor odor behavior.

The materials mentioned above also have only poor heat resistance, which is expressed in a low Vicat B softening temperature (Vicat B <130 ° C). A good The heat distortion resistance and heat aging resistance of the materials used is essential, however, since the interior of the motor vehicle can heat up considerably, particularly when exposed to solar radiation.

The above-mentioned disadvantages were overcome with polymer materials based on PBT / ASA / PSAN (polymer blends made of polybutylene terephthalate, acrylonitrile / styrene / acrylic acid ester copolymer and polystyrene / acrylonitrile copolymer). Such materials are generally disclosed in DE-A 39 11 828. The exemplary embodiments relate to molding compositions with a high acrylonitrile content of the PSAN copolymers. However, molded parts made from these molding compounds also have poor emission behavior.

The object of the invention is to provide suitable molding compositions for the production of moldings, which can be used in particular in the interior of motor vehicles, which have a favorable profile of properties with regard to their mechanical, optical and sensory properties, and in particular good heat resistance, heat aging resistance, flowability and have good emission behavior and / or smell behavior.

The object is achieved by a glass fiber-reinforced thermoplastic molding composition containing, based on the sum of components A to E and optionally F and G, which gives a total of 100% by weight,

a) 10 to 96.9 wt .-% of at least one aromatic polyester as a component

A,

b) 1 to 50% by weight of at least one particulate graft copolymer with a glass transition temperature of the soft phase below 0 ° C. and an average particle size of 50 to 1000 nm as component B,

c) 1 to 50 wt .-% of at least one copolymer of the monomers

cl) 50 to 90% by weight of at least one vinylaromatic monomer as component Cl and

c2) 10 to 50 wt .-% acrylonitrile and / or methacrylonitrile as Component C2,

as component C,

d) 1 to 50% by weight of fibers as component D,

e) 0.1 to 2% by weight of a stabilizer as component E, the stabilizer consisting of at least one main stabilizer and optionally at least one co-stabilizer; being the

The main stabilizer is a hydrocarbon optionally containing N, O or S or at least two of them as a heteroatom, which is combined with at least one sterically hindered optionally deprotonated phenol of the general formula I.

With

R ¹ = tert-butyl, cyclopentyl or cyclohexyl, and R ² = H, Ci to Cio hydrocarbon;

is bound via "~", and has a molecular weight in the range from 250 to 2500 g / mol and wherein the co-stabilizer consists of at least one phosphorus with 3 hydrocarbon radicals bonded to it, at least one of the radicals being bonded via an oxygen, and one Has molecular weight in the range of 91 to 1500 g / mol;

f) 0 to 25% by weight of other compatible polymers as component F which are homogeneously miscible with components A and / or C or dispersible therein, g) 0 to 10% by weight of conventional additives such as UV stabilizers, carbon black, pigments, oxidation retardants, lubricants and mold release agents as component G.

As component A, the molding composition according to the invention contains 10 to 96.9% by weight, preferably 20 to 75% by weight, particularly preferably 55 to 65% by weight, of an aromatic polyester. The polyesters contained in the molding compositions according to the invention are known per se. At least one of the aromatic polyesters of component A preferably has a viscosity number in the range from 90 to 165, preferably 100 to 150 and particularly preferably 110 to 135.

The polyesters can be prepared by reacting terephthalic acid, its esters or other ester-forming derivatives with 1,4-butanediol, 1,3-propanediol or 1,2-ethanediol in a manner known per se.

Up to 20 mol% of terephthalic acid can be replaced by other dicarboxylic acids. Examples include naphthalenedicarboxylic acids, isophthalic acid, adipic acid, azelaic acid, sebacic acid, dodecanedioic acid and cyclohexanedicarboxylic acids, mixtures of these carboxylic acids and ester-forming derivatives thereof. '- - - ¹

Up to 20 mol% of the dihydroxy compounds 1,4-butanediol, 1,3 propanediol or 1,2-ethanediol can also be replaced by other dihydroxy compounds, e.g. 1,6-hexanediol, 1,4-hexanediol, 1,4-cyclohexanediol, 1,4-di (hydroxymethyl) cyclohexane, bisphenol A, neopentyl glycol, mixtures of these diols and ester-forming derivatives thereof can be replaced.

Preferred aromatic polyesters are polyethylene terephthalate (PET), polytrimethylene terephthalate (PTT) and in particular polybutylene terephthalate (PBT), which are formed exclusively from terephthalic acid and the corresponding diols 1,2-ethanediol, 1,3-propanediol and 1,4-butanediol. The aromatic polyesters can also be used in whole or in part in the form of recycled polyester, such as PET regrind from bottle material or from waste from bottle manufacture.

In a preferred embodiment, component A consists of

al) 60 to 99% by weight, preferably 80 to 95% by weight, of polybutylene terephthalate and

a2) 1 to 40% by weight, preferably 5 to 20% by weight, of polyethylene terephthalate.

In a further particularly preferred embodiment, component A consists exclusively of polybutylene terephthalate. According to this embodiment, the glass fiber-reinforced thermoplastic molding composition according to the invention is free of polyethylene terephthalate.

As component B, the molding composition according to the invention contains 1 to 50% by weight, preferably 1 to 25% by weight, particularly preferably 2 to 15% by weight, in particular 2 to 10% by weight, of at least one particulate graft copolymer with a glass transition temperature of Soft phase below 0 ° C and an average particle size of 50 to 1000 nm. '

Component B is preferably a graft copolymer

bl) 50 to 90 wt .-% of a particulate graft base Bl with a glass transition temperature below 0 ° C and

b2) 10 to 50% by weight of a graft B2 from the monomers

b21) 50 to 90% by weight of a vinyl aromatic monomer as component B21 and

b22) 10 to 50% by weight of acrylonitrile and / or methacrylonitrile as component B22.

The particulate graft base B1 can consist of 70 to 100% by weight of a conjugated diene and 0 to 30% by weight of a difunctional monomer with two olefinic, non-conjugated double bonds. Such graft bases are used, for example, as component B in ABS polymers or MBS polymers.

According to a preferred embodiment of the invention, the graft base B1 consists of the monomers bll) 75 to 99.9% by weight of a Ct-Cio-alkyl ester of acrylic acid as component B1,

bl2) 0.1 to 10% by weight of at least one polyfunctional monomer with at least two olefinic, non-conjugated double bonds as component B12 and

bl3) 0 to 24.9% by weight of one or more further copolymerizable monomers as component B13.

The graft base B1 is an elastomer which has a glass transition temperature of preferably below -20 ° C, particularly preferably below -30 ° C.

For the production of the elastomer, the main monomers B1 are esters of acrylic acid with 1 to 10 C atoms, in particular 4 to 8 C atoms, in the alcohol component. Particularly preferred monomers B1 are iso- and n-butyl acrylate and 2-ethylhexyl acrylate, of which the latter two are particularly preferred.

In addition to the esters of acrylic acid, 0.1 to 10, preferably 0.1 to 5, particularly preferably 1 to 4% by weight of a polyfunctional monomer having at least two olefinic, non-conjugated double bonds are used as the crosslinking monomer B12. Examples are divinylbenzene, diallyl fumarate, diallyl phthalate, triallyl cyanurate, triallyl isocyanurate, tricylodecenyl acrylate and dihydrodicyclopentadienyl acrylate, of which the latter two are particularly preferred.

In addition to the monomers B1 and B12, up to 24.9, preferably up to 20% by weight of further copolymerizable monomers, preferably butadiene-1,3, styrene, α-methylstyrene, acrylonitrile, methacrylonitrile and d- Cs-alkyl esters of methacrylic acid or mixtures of these monomers may be involved. In a particularly preferred embodiment, the graft base B1 does not contain 1,3-butadiene; in particular, the graft base B1 consists exclusively of components B1 and B12.

On the graft base B1 is a graft B2 from the monomers b21) 50 to 90% by weight, preferably 60 to 90% by weight, particularly preferably 65 to 80% by weight, of a vinylaromatic monomer as component B21 and

b22) 10 to 50% by weight, preferably 10 to 40% by weight, particularly preferably 20 to 35% by weight, of acrylonitrile or methacrylonitrile or mixtures thereof

grafted.

Examples of vinyl aromatic monomers are unsubstituted styrene and substituted styrenes such as α-methylstyrene, p-chlorostyrene and p-chloro-α-methylstyrene. Unsubstituted styrene and α-methylstyrene are preferred, unsubstituted styrene is particularly preferred.

According to one embodiment of the invention, the average particle size of component B is 50 to 200 nm, preferably approximately 100 nm.

According to a preferred embodiment of the invention, the particle size distribution of component B is bimodal, component B being 10 to 90% by weight, preferably 30 to 90% by weight, particularly preferably 50 to 75% by weight from a small-part graft copolymer with an average particle size of 50 to 200 nm, preferably approx. 100 nm and 10 to 90% by weight, preferably 10 to 70% by weight, particularly preferably 25 to 50% by weight a large graft copolymer with an average particle size of 250 to 1000 nm, preferably about 500 nm.

According to a further preferred embodiment of the invention, the average particle size of component B is 200 to 1000 nm, preferably 400 to 600 nm and particularly preferably 450 to 550 nm.

The sizes determined from the integral mass distribution are given as the average particle size or particle size distribution. The mean particle sizes according to the invention are in all cases

Weight-average particle sizes, such as those using an analytical ultracentrifuge according to the method of W. Scholtan and H. Lange, Kolloid- Z. and Z. Polymers 250 (1972), pages 782-796. The ultracentrifuge measurement provides the integral mass distribution of the particle diameter of a sample. From this it can be seen what percentage by weight of the particles have a diameter equal to or smaller than a certain size. The mean particle diameter, which is also referred to as the dso value of the integral mass distribution, is defined as the particle diameter at which 50% by weight of the particles have a smaller diameter than the diameter which corresponds to the dso value. Likewise, 50% by weight of the particles then have a larger diameter than the dso value. To characterize the particle size distribution width of the rubber adjacent to the DSO value (median particle diameter) resulting from the integral mass distribution DTO and d ₉ o values are used. The dto or d ₉ o value of the integral mass distribution is defined in accordance with the dso value with the difference that they are based on 10 or 90% by weight of the particles. The quotient d90 - dio _ ^{■ ""} dso

represents a measure of the distribution width of the particle size. Emulsion polymers A which can be used according to the invention as component A preferably have Q values less than 0.5, in particular less than 0.35.

The graft copolymer B is generally one or more stages, i.e. a polymer composed of a core and one or more shells. The polymer consists of a basic stage (graft core) B1 and one or - preferably - several stages B2 (graft support) grafted thereon, the so-called graft stages or graft shells.

One or more graft shells can be applied to the rubber particles by simple grafting or multiple grafting, each graft sheath having a different composition. In addition to the grafting monomers, polyfunctional crosslinking or reactive group-containing monomers can also be grafted on (see e.g. EP-A 0 230 282, DE-A 36 01 419, EP-A 0 269 861).

According to one embodiment of the invention, crosslinked acrylic acid ester polymers with a glass transition temperature below serve as the graft base B1 0 ° C. The crosslinked acrylic ester polymers should preferably have a glass transition temperature below -20 ° C., in particular below -30 ° C.

In principle, a multi-layer structure of the graft copolymer is also possible, with at least one inner shell having a glass transition temperature of below 0 ° C. and the outermost shell having a glass transition temperature of more than 23 ° C. _

In a preferred embodiment, the graft B2 consists of at least one graft shell and the outermost graft shell thereof has a glass transition temperature of more than 30 ° C, a polymer formed from the monomers of the graft B2 would have a glass transition temperature of more than 80 ° C.

Suitable manufacturing processes for graft copolymers B are the emulsion,

Solution, bulk or suspension polymerisation. The graft copolymers B are preferably prepared by radical emulsion polymerization, at temperatures from 20 ° C. to 90 ° C. using water-soluble and / or oil-soluble initiators such as peroxodisulfate or benzoyl peroxide, or with the aid of redox initiators. Redox initiators are also suitable for polymerization below 20 ° C. The graft copolymers B are particularly preferably used in the form of concentrates. Preferred concentrates in this context are mixtures of styrene-acrylonitrile copolymers and the graft copolymer B with a concentration of B in the range from 40 to 60% by weight, based on the concentrate as a whole. The concentrates are produced by extrusion at 200 to 280 ° C.

Suitable emulsion polymerization processes are described in DE-A-28 26 925, DE-A31 49 358 and in DE-C-12 60 135.

The graft shells are preferably constructed in the emulsion polymerization process as described in DE-A-32 27 555, 31 49 357, 31 49 358, 34 14 118. The defined particle sizes of 50-1000 nm according to the invention are preferably carried out after the processes described in DE-C-12 60 135 and DE-A-28 26 925, or Applied Polymer Science, Volume 9 (1965),

Page 2929. The use of polymers with different particle sizes is known for example from DE-A-28 26 925 and US 5,196,480. The molding compositions of the invention comprise, as component C, 1 to 50% by weight, preferably 10 to 25% by weight, particularly preferably 12 to 20% by weight, of a copolymer of the monomers

cl) 75 to 90% by weight, preferably 77 to 90% by weight, particularly preferably 81 to 90

Wt .-%, at least one vinyl aromatic monomer as component Cl and

c2) 10 to 25% by weight, preferably 10 to 23% by weight, particularly preferably 10 to 19% by weight, in particular 15 ^" to 19% by weight, acrylonitrile and / or methacrylonitrile as component C2.

Suitable vinyl aromatic monomers are the above-mentioned monomers C1 and the above-mentioned vinyl aromatic monomers as component B21. Component C is preferably an amorphous polymer, as described above as graft B2. According to one embodiment of the invention, a copolymer of styrene and / or α-methylstyrene with acrylonitrile is used as component C. The acrylonitrile content in these copolymers of component C is slightly above 25% by weight and is generally 10 to 25% by weight, preferably 10 to 22% by weight, particularly preferably 10 to 19% by weight, in particular 15 up to 19% by weight. Component C also includes the free, non-grafted styrene-acrylonitrile copolymers formed in the graft copolymerization to produce component B. Depending on the conditions chosen for the preparation of the graft copolymer B in graft copolymerization, it may be possible that a sufficient proportion of component C has already been formed in the graft copolymerization. In general, however, it will be necessary to mix the products obtained in the graft copolymerization with additional, separately produced component C.

This additional, separately produced component C can preferably be a styrene / acrylonitrile copolymer, an α-methylstyrene / acrylonitrile copolymer or an α-methylstyrene / styrene / acrylonitrile terpolymer.

According to the invention, it is preferred that the acrylonitrile content in the copolymer C is between 10 and 50, preferably 15 to 45 and particularly preferably 17 to 40% by weight. In another embodiment of the fiber-reinforced thermoplastic molding composition according to the invention, the acrylonitrile content in the copolymer C is in the range from 17 to 22% by weight, based in each case on the copolymer C. In a further embodiment of the fiber-reinforced thermoplastic composition according to the invention, the acrylonitrile content is in the copolymer C in the range from 23 to 27% by weight, based in each case on the copolymer C. In a further embodiment of the fiber-reinforced thermoplastic composition according to the invention, the acrylonitrile content in the copolymer C is in the range from 32 to 38% by weight. , each based on the copolymer C. Furthermore, the copolymer C of a further glass-fiber-reinforced molding composition according to the invention has an acrylonitrile content of up to 45% by weight if the component Cl as vinyl aromatic monomer has α-methylstyrene or preferably essentially composed of α- Methylstyrene exists.

The copolymers can be used individually or as a mixture for component C, so that the additional, separately produced component C of the molding compositions according to the invention is, for example, a mixture of a styrene / acrylonitrile copolymer (PSAN) and an α-methylstyrene / Acrylonitrile copolymer can act. The acrylonitrile content of the various copolymers of component C can also be different. However, component C preferably consists only of one or more styrene / acrylonitrile copolymers, it being possible for the copolymers to have different acrylonitrile contents. In a particularly preferred embodiment, component C consists of only one styrene / acrylonitrile copolymer.

As component D, the fiber-reinforced thermoplastic molding compositions according to the invention contain 1 to 50% by weight, preferably 5 to 50% by weight, particularly preferably 7 to 40% by weight, in particular 10 to 30% by weight, of fibers. These fibers can be both organic and inorganic fibers, with inorganic fibers being preferred. The inorganic fibers are fibers containing silicon oxides, such as basalt wool fibers or glass fibers, with glass fibers being preferred. These are commercially available products. In the case of dashboard supports, it is preferred for reasons of weight that the proportion of component D is at most 20% by weight. %, based on the glass fiber reinforced thermoplastic molding composition according to the invention.

Before being incorporated into the glass fiber-reinforced thermoplastic molding composition according to the invention, the fibers used according to the invention preferably have a length in the range from 0.5 to 10, preferably 2 to 7 and particularly preferably 3 to 5 mm. In the fiber-reinforced molding composition, these generally have an average length of 0.1 to 0.5 mm, preferably 0.1 to 0.4 mm and a diameter in the range of 6 to 20 μm. Glass fibers made of E-glass are particularly preferred. The glass fibers can be coated with organosilanes, epoxysilanes or other polymer coatings in order to achieve better adhesion.

As component E, the glass fiber-reinforced thermoplastic molding composition according to the invention has a stabilizer in an amount in the range from 0.1 to 2, preferably 0.2 to 1 and particularly preferably 0.3 to 0.7% by weight, based on the molding composition. In a preferred embodiment, the stabilizer consists of at least one main stabilizer and at least one co-stabilizer. The proportion of the at least one main stabilizer or the at least one co-stabilizer in the stabilizer is preferably in the range from 100 to 20 or 0 to 80% by weight, based in each case on the stabilizer. '

In a particularly preferred embodiment of the molding composition, no co-stabilizer is contained.

It is further preferred according to the invention that the main stabilizer contains at least one heteroatom. The main stabilizer preferably has 1 to 20, preferably 2 to 10 and particularly preferably 3 to 6 heteroatoms. Oxygen and nitrogen are preferred as heteroatoms and oxygen is particularly preferred. In a particularly preferred embodiment, the main stabilizer, including the oxygen of the OH group of the phenol, has 8 oxygen atoms.

Isopropyl, tert-butyl and cyclohexyl are preferred as radical R ¹ and ter-butyl is particularly preferred. The radical R is preferably a Ci to Cs hydrocarbon and in particular a methyl, ethyl, propyl, isopropyl, n-butyl, isobutyl, tert-butyl radical, with methyl and tert-butyl radicals in particular are preferred. 1 - _j

In an embodiment preferred according to the invention, both R and R are tert-butyl radicals. In another preferred embodiment according to the invention, one of the radicals R or R is tert-butyl and the other is methyl.

The molecular weight of the main stabilizer is preferably in the range from 300 to 700 and particularly preferably in the range from 550 to 650 g / mol.

In a particularly preferred embodiment, the main stabilizer has a tert-butyl group as radical R and a methyl group as radical R ² , including the oxygen of the OH group of the phenol, 8 oxygen atoms as heteroatoms and a molecular weight in the range from 550 to 650 , preferably 570 to 620 and particularly preferably 580 to 600 g / mol.

According to the invention suitable primary stabilizers are in particular the compounds provided by CIBA Specialty Chemicals Inc. under the trade name Irganox ^® with the following numbers: 245, 259, 565, 1010, 1035, 1076, 1098, 1135, 1141, 1330, 1425, 1520, 3052, 3114 and 1024, preferably 245: ethylene bis (oxyethylene) bis [3- (5-tert-butyl-4-hydroxy-m-tolyl) propionate]; 1010: pentaerythrityl-tefra-ds [3- (3,5-bis (l, l-dimethyl) -4-hydroxyphenyl) propionate]; ■ _ j 1098: N, NΗexamemylenebis (3,5-di-tert-butyl-4-hydroxy-hydrocinnamic acid amide); 1076: octadecyl 3- (3,5-di-tert-butyl-4-hydroxyphenyl) propionate; 259: hexamethylene bis (3- (3,5-di-tert-butyl-4-hydroxyphenyl) propionate); and 1425: Calciumdiethyl-bis (((3,5-bis (l, l-dimethyl) -4-hydroxyphenyl) methyl) phosphonate, and Irganox ^® 245 is especially preferred.

In the case of the co-catalyst, it is preferred that it has 1 to 5, preferably 1 to 4 and particularly preferably 1 or 2 phosphorus atoms, a phosphorus atom being particularly preferred.

In the case of the catalyst with 2 or more phosphorus atoms, these phosphorus atoms are connected to one another via a hydrocarbon and the other bonds of the phosphorus which are still free are connected to another hydrocarbon via an oxygen. In an embodiment in which the cocatalyst has only one phosphorus atom, 2 or preferably 3 are the

Hydrocarbon residues bound to it via an oxygen atom. The hydrocarbon residues of the co-catalyst are alkyl, alkylaryl and Alkyl residues into consideration. Among them, arylalkyl, aralkyl and aryl radicals having a benzene ring are preferred, with aryl and arylalkyl radicals also being preferred.

The cocatalyst preferably has a molecular weight in the range from 100 to 1000, preferably 200 to 700 and particularly preferably 300 to 400 g / mol.

Preferred co-stabilizers are available from Ciba Specialty Chemicals Inc. Irgafos ^® available TNPP, TPPP, P-EPQ, 168, and DDPP, wherein Irgafos ^® P-EPQ: Tetrakis (2,4-di-tert-butylphenyl) [l , l-biphenyl] -4,4-diylbisphosphonit; TNPP: tris (nonylphenyl) phosphite and TPP: triphenyl phosphite are particularly preferred. Irgafos ^® P-EPQ is preferred.

Other, but less preferred, main stabilizers are, for example, Lovinox ^® and Anox ^® as sterically hindered phenols. As still appropriate, but not as much preferred co-stabilizers may be mentioned, for example Alkanox® ^® from the group of phosphites. One of the manufacturers of such compounds is the Great Lakes Chemical Corporation. For example, Irganox ^® 245 corresponds to Lovinox ^® GP45, Irganox ^® 1076 Anox ^® PP 18 and Irgafos ^® 168 Alkonox ^® 240.

I

As component F, the molding compositions according to the invention can contain 0 to 25% by weight of further polymers which are homogeneously miscible with components A and / or C or dispersible therein. For example, customary (grafted) rubbers can be used, such as ethylene-vinyl acetate rubbers,

Silicone rubbers, polyether rubbers, hydrogenated diene rubbers, polyalkename rubbers, acrylate rubbers, ethylene-propylene rubbers, ethylene-propylene-diene rubbers and butyl rubbers, methyl methacrylate-butadiene-styrene (MBS) rubbers, methyl methacrylate-butyl acrylate are miscible or dispersible in the mixed phase formed from components A, B and C. Acrylate rubber, ethylene propylene (EP) rubber, ethylene propylene diene (EPDM) rubber are preferably used. Also suitable are polymers or copolymers, such as polycarbonates, polymethacrylates, in particular PMMA, polyphenylene ether or syndiotactic polystyrene, which are compatible or miscible with the mixed phase formed from components B and C. Reactive rubbers which bind to the polyester (component A) via a covalent bond, as with, are also suitable Acid anhydrides, such as maleic anhydride, or epoxy compounds, such as glycidyl methacrylate, grafted polyolefin rubbers and / or particulate acrylate rubbers. Finally, it is also possible to use one or more polymers or copolymers which are present in the interface between the amorphous phase formed from components B and / or C and the crystalline or partially crystalline phase formed from component A, and thus for better binding of the worry in both phases. Examples of such polymers are graft copolymers of PBT and PSAN or segmented copolymers such as block copolymers or multiblock copolymers from at least one segment from PBT with M _w > 1000 and at least one segment from PSAN or a segment compatible with PSAN with M _w > 1000 ,

The molding compositions according to the invention contain 0 to 10, preferably 0.01 to 7 and particularly preferably 0.1 to 3% by weight of conventional additives as component G. Examples of such additives are: UV stabilizers, oxidation retarders, lubricants and mold release agents, dyes, pigments, colorants, nucleating agents, antistatic agents, antioxidants, stabilizers to improve thermal stability, to increase light stability, to increase resistance to hydrolysis and to chemicals, agents against heat decomposition and in particular the lubricants / lubricants which are expedient for the production of moldings or moldings. These additional additives can be metered in at any stage of the production process, but preferably at an early point in time, in order to take advantage of the stabilizing effects (or other special effects) of the additive at an early stage. Heat stabilizers or oxidation retarders are common

Metal halides (chlorides, bromides, iodides) derived from Group I metals in the Periodic Table of the Elements (such as Li, Na, K, Cu).

Suitable UV stabilizers are the usual hindered phenols which differ from the stabilizer according to the invention, but also vitamin E or compounds of an analogous structure. HALS stabilizers (Hindered Amine Light Stabilizers), benzophenones, resorcinols, salicylates, benzotriazoles and other compounds are suitable (for example, Tinuvin ^®, such as Tinuvin ^® 770 (HALS absorber, bis (2,2,6,6-tetramethyl-4 -piperidyl) sebacate) or Tinuvin ^® P (UV absorber - (2H-benzotriazol-2-yl) -4-methylphenol), Topanol ^® ). These are usually used in amounts of up to 2% by weight (based on the total mixture). Suitable lubricants and mold release agents are stearic acids, stearyl alcohol, stearic acid esters or generally higher fatty acids, their derivatives and corresponding fatty acid mixtures with 12 to 30 carbon atoms. The amounts of these additives are in the range from 0.05 to 1% by weight.

Silicone oils, oligomeric isobutylene or similar substances can also be used as additives; the usual amounts are 0.05 to 5% by weight. Pigments, dyes, color brighteners such as ultramarine blue, phthalocyanines, titanium dioxide, cadmium sulfides, derivatives of perylene tetracarboxylic acid can also be used. Carbon black can also be used as an additive both pure and as a masterbatch.

Processing aids and stabilizers such as UV stabilizers, lubricants and antistatic agents are usually used in amounts of 0.01 to 5% by weight, based on the total molding composition.

Nucleating agents such as talc, calcium fluoride, sodium phenylphosphinate, aluminum oxide or finely divided polytetrafluoroethylene can also be used in amounts e.g. up to 5% by weight, based on the total molding composition, can be used. Plasticizers, such as phthalic acid dioctyl ester, phthalic acid dibenzyl ester, phthalic acid butyl benzyl ester, hydrocarbon ble, N- (n-butyl) benzenesulfonamide, o- and p-toluenesulfonamide are advantageously added in amounts of up to about 5% by weight, based on the molding composition. Colorants, such as dyes and pigments, can be added in amounts of up to about 5% by weight, based on the molding composition.

Components A, B, C, D, E and, if appropriate, F and G can be mixed in any desired manner by all known methods. When mixing, components A to E and optionally F and G can be used as such or in the form of mixtures of one component with one or more of the other components. For example, component B can be premixed with part or all of component C and optionally components E, F and G and then mixed with the other components. If components B and C have been prepared, for example, by emulsion polymerization, it is possible to mix the polymer dispersions obtained with one another, to precipitate the polymers together thereupon and to work up the polymer mixture. Preferably however, components B and C are mixed by extruding, kneading or rolling the components together, components B and C having, if necessary, been isolated beforehand from the solution or aqueous dispersion obtained in the polymerization. The thermoplastic molding compositions according to the invention can be produced, for example, by melting component A with the individual components B to E or with a mixture of these, and optionally with components F and G, in an extruder and melting the glass fibers through an inlet on Extruder feeds.

The molding compositions according to the invention can be processed into molded parts by the known methods of thermoplastic processing. In particular, they can be produced by thermoforming, extrusion, injection molding, calendering, blow molding, pressing, press sintering, deep drawing or sintering, preferably by injection molding and injection-molded films. The molded parts which can be produced from the molding compositions according to the invention are also the subject of the present invention.

The molded parts produced from the molding compositions according to the invention have one or more of the following features:

(I) carbon emission according to PV 3341 <50 μg C / g;

(II) result of the odor test according to DIN 50 011 / PV 3900 at least grade 4;

(in) Vicat B softening temperature> 145 ° C;

(IV) impact strength according to ISO 197 / leU after 500 h of heat storage at 120 ° C> 40 U / m ² ;

(V) drop in impact strength according to ISO 179 / leU after 500 h of heat storage at 120 ° C <10%,

(VI) Elongation at break according to ISO 527-2 after 500 h

Heat storage at 120 ° C>2%; (Nil) modulus of elasticity according to ISO 527-2> 5000 MPA;

(Vm) impact strength according to ISO 197/1 eU> 40 kJ / m ² ;

(IX) yield stress according to ISO 527-2> 80 Mpa;

(X) impact strength without heat storage according to ISO 197/1 eA> 6 kJ / m ² ;

(XI) HDT B according to ISO 75 embodiment B> 190 ° C;

(Xu) Flowability (MVR 275 ° C / 2, 16 kp contact force) according to ISO 1133

20 cm / 10 min;

(XSL) no splintering behavior down to -30 ° C in the puncture test after 500 h of heat storage at 120 ° C with 3 mm plate diameter according to

ISO 6603/2;

(XTV) Density in the range of 1.2 to 1.5 g / cm

In general, the molded parts can have any conceivable two, three or multiple combinations of features I to XIV. The preferred combinations of features which the molded parts obtained from the molding composition according to the invention can have are now given on the basis of the following Roman numerical combinations: I, DI, V, Xu; I, II, III, N Xu; I, π, DI, V. All features I to XTV are particularly preferably fulfilled in a fiber-reinforced molded part according to the invention.

The molded parts produced from the molding compositions according to the invention have only low emissions of volatile constituents with a noticeable odor. The odor behavior of polymer materials is assessed according to DEM 50011 / PV 3900 and applies to components of the vehicle interior. The result of the odor test according to this standard is in the case of the moldings according to the invention in general grade 4 and preferably better than grade 4. The carbon emission of the moldings according to PV 3341 is generally <50 μg / g, preferably <45 μg / g, particularly preferably <40 μg / g, but preferably at least 10 μg / g.

The moldings according to the invention also have good heat steadfastness. The Vicat B softening temperature is generally> 130 ° C, preferably> 140 ° C, particularly preferably> 150 ° C, but preferably a maximum of 170 ° C.

The moldings according to the invention also have good heat aging behavior. The impact strength of the moldings according to the invention according to ISO 179 / leU after 500 hours of heat storage at 120 ° C. is generally> 25 kJ / m ² , preferably> 30 kJ / m and particularly preferably> 40 kJ / m, but is preferred

• p maximum 70 kJ / m.

The elongation at break of the moldings according to the invention is generally> 1.5%, preferably> 2%, but preferably a maximum of 5% after heat storage at 120 ° C. for 500 hours.

The moldings according to the invention also have good mechanical properties. For example, its modulus of elasticity is generally> 5000, preferably> 5500 MPa, but preferably a maximum of 1000 MPa; their yield stress generally> 100, preferably> 90 MPa, but preferably at most 130 MPa; their impact strength according to ISO 179 / leU generally> 40, preferably> 45 kJ / m, but preferably at most 75 kJ / m; their impact strength without prior heat storage according to ISO 179 / leA, generally> 6 kJ / m, but preferably a maximum of 15 kJ / m; and their HDT B (measured according to ISO 75, embodiment B) generally> 190 ° C, preferably> 200 ° C and their flowability (MVR 275 ° C / 2.16 kp contact force)> 15, preferably> 20 g / cm ³ , but preferably a maximum of 35 g cm ³ .

The molded parts according to the invention do not exhibit any splintering behavior in the puncture test (2 and 3 mm plate diameter, in accordance with ISO 6603/2), even after heat storage at 120 ° C. for 500 hours.

The density of the molding compositions according to the invention is preferably 1.2 to 1.4 and particularly preferably 1.2 to 1.35 g / cm.

Furthermore, the present invention relates to a composite, preferably comprising a molded part according to the invention as a first molded part and a second molded part, the first molded part and the second molded part being connected to one another via at least one

Partial area of a surface α of the first molded part and a surface β of the second molded part are rigidly connected via a welding area.

The composite according to the invention is produced by a method in which at least a partial area of the surface α is welded to that of the surface β to form a welding area.

All methods known to the person skilled in the art and suitable for this purpose can be used for welding. In this context, welding using friction, heating elements, ultrasound, laser, mirror, high frequency and heat pulse have proven their worth. Friction welding methods are particularly preferred, with vibration welding being particularly preferred among the friction welding methods.

In vibration welding, the energy for melting and welding the molded parts is generated by a certain amplitude of oscillating friction movement under the action of a sufficiently high friction pressure. The surfaces of the molded parts plasticized by the rubbing movement are aligned after the rubbing movement has ended or still during the rubbing movement. The materials of the plasticized surfaces of the molded parts are at least partially combined with one another under a defined pressure.

A vibration welding cycle is divided into pressing, rubbing, joining and possibly holding. The pressing takes place over a contact time of 1 to 10, preferably 2 to 5 minutes at a contact pressure of 1 to 20 and preferably 2 to 10 N / mm ² . The rubbing takes place over a rubbing time of 1 to 10 and preferably 2 to 5 minutes at a rubbing pressure of 1 to 20 and preferably 2 to 10 N / mm. The joining is again carried out over a joining time of 1 to 10, preferably 2 to 7 and particularly preferably 3 to 5 minutes at a joining pressure in the range from 1 to 20 and preferably 2 to 10 N / mm. The holding takes place over a holding time of 1 to 120, preferably 2 to 60 and particularly preferably 10 to 30 minutes at a holding pressure in the range of 1 to 20 and preferably 2 to 10 N / mm. The oscillating movement is preferably carried out at a frequency in the range from 100 to 500, preferably 150 to 400 and particularly preferably 200 to 300 Hz. The amplitude of the oscillating rubbing movement is 0.01 to 10 and preferably 0.05 to 1 mm.

In the case of the composites according to the invention and the molded parts forming them it is usually a flat body surrounded by a surface. As a rule, only partial areas of this surface are used for the formation of the welding area. The sections to be welded generally have an elongated shape. If such partial areas are welded together, a welding area in the form of a weld seam is created.

The plasticization of the partial surface areas of the molded parts to be welded is generally carried out at a depth in the range from 0.1 to 2, preferably from 0.2 to 1 and particularly preferably from 0.3 to 0.6 mm.

The depth of plasticization depends on the material requirements for the welding area. The higher the strength required by the welding area, the deeper the plasticization of the surface of the partial areas of the molded parts.

Accordingly, a composite is obtainable according to a method, wherein at least a partial area of a first surface of the first shaped part defined above is welded to a second surface of the second shaped part defined above, forming a welding area.

The invention further relates to a composite, the welding area having at least a tensile strength in the range from 25 to 75, preferably 30 to 60 and particularly preferably 35 to 55 N / mm.

The invention further relates to a laminate which preferably contains a molded part according to the invention or a composite or at least two of them as laminate components L1 and a polycondensate foam as laminate component L2. The molded part and the polycondensate foam are advantageously firmly connected to one another via their surfaces. The laminates are preferably distinguished by excellent foam adhesion of the foam to the surface of the composite or molded part, without the need for pretreatment, for example by means of a primer. When the foam is pulled off or peeled off from the molded part surface, cohesive breakage is observed; foam residues remain on the surface. All foamable polycondensates known to the person skilled in the art can be used for the polycondensate foam.

In a further embodiment according to the invention, it is preferred that the composite or molded surfaces of the foam is applied without the use of a primer. Among these polycondensates, polyamides and polyurethanes are preferred and polyurethanes are particularly preferred. In the case of the polyurethane foams, semi-rigid and flexible foams are again particularly preferred; these can optionally contain adhesion promoters. In particular, the product Elastoflex ^® from Elastogran GmbH, Lemfbrde, is used as the polyurethane foam. Further suitable polyurethanes can be found in the Plastics Handbook Volume 7 "Polyurethanes", 3rd edition, 1993, Karl Hanser Verlag Munich, Vienna. The laminate can be produced by a process in which the laminate component L2 is applied to the laminate component L1. This can On the one hand, this is done by the fact that the laminate component L2 is already present as a polycondensate foam or that the laminate component L2 is foamed on the laminate component L. In this production process, it is preferred that no solvent-containing primer is used.

The molding compositions according to the invention are suitable on account of their high heat resistance, their good heat aging resistance, their good mechanical properties, their excellent processing behavior and their good surface properties for a large number of moldings which contain these molding compositions.

Due to the properties mentioned above, the molded parts according to the invention are particularly suitable for applications in motor vehicles. Since the molding compositions according to the invention are also contained in the composites and laminates according to the invention, they are also particularly suitable for use in motor vehicles. The motor vehicle application can be subdivided into an external application on the one hand and an internal application on the other. For interior use, applications in the passenger compartment are particularly preferred due to the good emission values and the pleasant odor behavior of the molding compositions, composites and laminates according to the invention. The following application examples of the molded parts according to the invention therefore also apply to the composites and laminates according to the invention.

Because of their good properties, the molded parts according to the invention are particularly suitable for applications in motor vehicle construction. invention

Molded parts are in particular from the molding compositions according to the invention Manufactured parts such as light switch housings, lamp housings, housings for the central electrical system, power strips, plug connectors, housings for ABS controllers, license plate holders and luggage rack roof rails.

Because of their good emission behavior, the molded parts according to the invention are particularly suitable for applications in the motor vehicle interior. Moldings according to the invention are therefore preferably covers, storage compartments, instrument panel supports, door parapets, parts for the center console as well as brackets for radio and air conditioning, panels for the center console, panels for radio, air conditioning and ashtrays, extensions of the center console, storage pockets, shelves for the molding compositions according to the invention the driver and front passenger door, storage for the center console, components for the driver and front passenger seat, such as seat panels, defroster duct, interior mirror housing, sunroof elements such as sunroof frame, instrument panel and panels, instrument holders, upper and lower shell for the steering column, air ducts, air vents and intermediate pieces for Air flow and defroster duct, door side panels, panels in the knee area, air outlet nozzles, defroster openings, switches and levers. These applications are only examples of conceivable automotive interior applications. It is particularly preferred that the molded parts according to the invention can be laser patterned.

Furthermore, body parts, in particular fenders, tailgates, side panels, bumpers, planking, license plate supports, panels, sunroof panels or frames and bumpers or their components are preferred as molded parts.

In addition, boat hulls, lawn mower housings, garden furniture, motorcycle parts, camera housings, cell phone housings, sockets for binoculars, vapor ducts for extractor hoods, parts for pressure cookers, housings for hot air grills and pump housings are only examples of other moldings that are not limited to the motor vehicle sector.

The use of the molding compound has proven particularly useful for molded parts such as connectors, housing parts, in particular for large automotive electronics, such as in particular ABS / ASR, ESP gearboxes, seat, mirror motor, window motor, convertible top control, airbag release, Interior security, acceleration sensor and ignition electronics as well as the electronics for Detection of the seat occupancy. Furthermore, it is preferred to use the molding compound according to the invention for locking system housings, car relays, covers for wiper housings and for lock housings.

Another preferred group of molded parts which can be produced from the molding compositions according to the invention are gas meter housings, wind deflector blades, servomotor housings, the servomotors being preferably used in motor vehicle construction, brewing machine parts, furnace parts, in particular for thermal insulation, such as holding buttons and stove handles, windshield wiper parts, in particular wiper blade holders, spoilers , Mirror support plates for automotive mirrors, and housings for washing machine controls.

Furthermore, the molding compositions according to the invention are suitable for other moldings used in the household area, preferably in the kitchen area. These include bread makers, toasters, table grills, kitchen machines, electric can openers and juicers. In the case of these objects, switches, housings, handles and covers are preferably produced from the molding compositions according to the invention. The molding compositions according to the invention can furthermore be used for molded parts of stoves. For cookers, stove handles, stove knobs and switches are particularly preferred.

Another use of the molding compositions according to the invention is in moldings which meet the requirements of the Federal Drug Administration or comparable national authorities in other countries. In this area, pharmaceutical packaging and containers for pharmaceutical kits are particularly preferred.

In addition, the molding compositions according to the invention can be used in the field of food packaging. Here, molded parts from the molding compositions according to the invention, such as boxes, pots, trays and containers of other types, are preferred. In connection with the uses of the molding compositions according to the invention, their food-fastness and resistance to fat and liquids, which has a particularly positive effect on parts of household appliances, should be emphasized.

The use of the molding compositions defined above has proven particularly useful for the production of molded parts that can be exposed to high temperatures. Such molded parts are, in particular, headlight parts which are used in the area of the headlight in which temperatures above 100 ° C., preferably 110 ° C. and particularly preferably 130 ° C. and at most up to 200 ° C. can occur during operation of the headlight. Such parts can be both glass fiber reinforced and glass fiber unreinforced.

The advantage of using the molding compositions according to the invention is, in particular, that such headlight parts with a reflective, metallized surface do not cause these surfaces to become dull. Furthermore, the use of the molding compositions according to the invention means that even when the headlamp is in operation for a long time, there are no deposits on the transparent areas of the headlamp through which the light passes, and the reflective properties of metallized surfaces of these molded bodies are retained. The molding compositions according to the invention can also be used for the production of further headlight components. These headlight components include, in particular, headlight housings, frames, brackets and guides, headlight frames being preferred.

Furthermore, the other advantageous properties of the molding compositions according to the invention, such as low cycle times, no formation of mold deposits during injection molding, and excellent quality of the metallized surfaces are retained.

In particular, no clouding of the metallized surface is observed when the molded part is heated to temperatures in the range from 100 to 200 ° C., preferably from 110 to 180 ° C. and particularly preferably from 130 to 170 ° C., so that molded parts with metallized surfaces with permanent reflection - Properties can be obtained.

Furthermore, the use of the molding compositions according to the invention has proven itself in the production of large-area moldings which are comparatively thin in relation to their area and which require excellent demolding behavior. Such large-area molded parts are, in particular, sunroof cross members, body parts, air inlet grilles, parts of door side panels, parts of instrument panels, such as instrument panel supports, covers, air ducts, add-on parts, in particular for the center console as part of the glove compartment and speedometer cover.

The invention also relates to the use of the molding compositions according to the invention for the production of the moldings mentioned.

The invention further relates to the recycling of a molding composition according to the invention, a molded part according to the invention, a composite according to the invention or a laminate according to the invention and the recyclate obtainable from recycling.

When recycling the molding composition according to the invention, the molding according to the invention, the composite according to the invention or the laminate according to the invention as a recycling composition, all methods known to the person skilled in the art can be used.

It is preferred to first clean, shred the recycling material, if necessary to clean it again and then, if necessary, to assemble it.

When recycling the laminate according to the invention, it is preferred to peel the laminate component L2 from the laminate component L1 before the laminate component L1 is shredded into recyclate.

The recyclate obtained can be processed in whole or in part to give the molding compositions, moldings, composites or laminates according to the invention.

Recycled molded parts of this type have at least 10, preferably at least 15 and particularly preferably at least 70% by weight, based on the molded part, of recyclate.

The invention also relates to the use of the molding compositions or recyclates according to the invention for the production of the moldings mentioned. Furthermore, the invention relates to the use of a stabilizer according to the invention for setting one or more previously defined features in a molded part.

With this use of the stabilizer, the features shown above as preferred for the molded part are also preferred. It is further preferred that this molded part is a molded part produced from a fiber-reinforced thermoplastic molding composition according to the invention. Furthermore, when using the stabilizer, it is preferred to use the stabilizer in the amounts described above for component E.

The stabilizer used according to the invention can be used in particular to adjust the above-mentioned characteristics of molding compositions which, in addition to component A, have at least one further amorphous polymer which is preferably compatible with component A. Such amorphous polymers only have a glass transition temperature and, because of their infusibility, no melting temperature.

The invention is illustrated by the following examples:

Examples:

Examples 1 to 4 and comparative example

According to the information in Table 1 below, the stated amounts of polybutylene terephthalate (PBT), glass fibers, graft rubbers P1 and P2, copolymers PSAN 1 and PSAN 2, and stabilizer and additives are mixed in a screw extruder at a temperature of 250 ° C. to 270 ° C. The test specimens corresponding to the relevant ISO or DIN specifications are injection molded from the molding compositions formed in this way.

PI is a small-sized ASA graft rubber with 25% by weight acrylonitrile in the SAN graft shell with an average particle size of approx. 100 nm.

P2 is a large-part ASA graft rubber with an average particle diameter of approx. 500 nm. PSAN 1 is a styrene-acrylonitrile copolymer with 35% by weight acrylonitrile.

PSAN 2 is a polystyrene acrylonitrile copolymer with 19% by weight acrylonitrile.

Stabilizer is Irganox ^® 245 from CIBA Specialty Chemicals Inc.

The mold release agent is Loxiol ^® VPG 861 / 3.5 from Henkel KG aA

The nucleating agent is talc.

Soot is Black Pearls 880.

The modifier is Blendex ^® WX 270 from General Electrics Specialties.

The emission behavior was assessed according to DV 3341 and DIN 50011 / PV 3900 C3.

The odor emission was measured according to DIN 50011 / PV3900 C3 as follows:

A sample volume of 50 cm was tightly closed in a 1 liter container with an odorless seal and lid and stored in a preheated heat chamber with air circulation at 80 ° C. for 2 hours. After the test vessel was removed from the heat chamber, the test vessel was cooled to 60 ° C before the evaluation was carried out by at least 3 examiners. The odor assessment is based on the rating scale with the grades 1 to 6, whereby half intermediate steps are possible.

Rating scale:

Note 1 not noticeable

Noticeable grade 2, not distracting

Grade 3 clearly perceptible, but not yet disturbing

Note 4 disturbing

Note 5 very disturbing Note 6 unbearable

Table 2 contains the results of the odor test and the results of the mechanical tests also carried out.

* according to the invention

Table 2:

erfindungsgemäß

inventively

Table 2 clearly shows that the use of the stabilizer surprisingly clearly improves all the material properties of the molding compositions according to the invention measured in the examples compared to the comparative molding composition without stabilizer.

Claims

claims 1. Fiber-reinforced thermoplastic molding composition containing, based on the sum of components A to E and optionally F and G, which gives a total of 100% by weight, a) 10 to 96.9% by weight of at least one aromatic polyester as component A, b) 1 to 50% by weight of at least one particulate graft copolymer with a glass transition temperature of the soft phase below 0 ° C. and an average particle size of 50 to 1000 nm as component B, c) 1 to 50 wt .-% of at least one copolymer of the monomers cl) 50 to 90% by weight of at least one vinylaromatic monomer as component Cl and c2) 10 to 50% by weight of acrylonitrile and / or methacrylonitrile ^~ as component C2, as component C, d) 1 to 50% by weight of fibers as component D, e) 0.1 to 2% by weight of a stabilizer as component E, the stabilizer consisting of at least one main stabilizer and optionally at least one co-stabilizer; being the The main stabilizer is a hydrocarbon optionally containing N, O or S or at least two of them as a heteroatom, which is combined with at least one sterically hindered optionally deprotonated phenol of the general formula I.

With R ¹ = tert-butyl, cyclopentyl or cyclohexyl, and R ² = H, Ci to do hydrocarbon; is bound via "~", and a molecular weight in the range of 250 to 2500 g / mol and where the Co-stabilizer consists of at least one phosphorus with 3 hydrocarbon residues attached to it, at least one of the residues being attached via an oxygen, and has a molecular weight in the range from 91 to 1500 g / mol; f) 0 to 25% by weight of other compatible polymers as component F, which are homogeneously miscible with components A and or C 0 'or dispersible therein, as component F, g) 0 to 10% by weight of conventional additives such as UV stabilizers, oxidation retardants, lubricants and mold release agents as component G. 2. Molding composition according to claim 1, characterized in that component A consists of al) 60 to 99 wt .-% polybutylene terephthalate and ^~~ a2) 1 to 40% by weight of polyethylene terephthalate. 3. Molding composition according to claim 1 or 2, characterized in that component B consists of bl) 50 to 90 wt .-% of a particulate graft base Bl from the monomers bll) 75 to 99.9% by weight of a C 1 -C 8 -alkyl ester of acrylic acid as component B1, bl2) 0.1 to 10% by weight of at least one polyfunctional Monomers with at least two olefinic, non-conjugated double bonds as component B12 and bl3) 0 to 24.9% by weight of one or more further copolymerizable monomers as component B13, and b2) 10 to 50% by weight of a graft B2 from the monomers b21) 50 to 90 wt .-% of a vinyl aromatic monomer as Component B21 and b22) 10 to 50% by weight of acrylonitrile and / or methacrylonitrile as component B22. 'j 4. Molding composition according to one of claims 1 to 3, characterized in that the components B21 and / or Cl are unsubstituted styrene. 5. Molding composition according to one of claims 1 to 4, characterized in that component B 1 consists of components B1 and B 12. 6. Molding composition according to one of claims 1 to 5, characterized in that component B to 10 to 90 wt .-% of a small-sized graft copolymer with an average particle size of 50 to 200 nm and 10 to 90 wt .-% of one large-scale graft copolymer with an average particle size of 250 to 1000 nm. 7. molded parts from molding compositions according to one of claims 1 to 6. 8. Molded parts according to claim 7 with, one or more of the features: (T) carbon emission according to PV 3341 <50 μg C / g; (II) result of the odor test according to DIN 50 011 / PV 3900 at least as grade 4; (DI) Vicat B softening temperature> 145 ° C; (IV) impact strength according to ISO 197 / leU after 500 h of heat storage at 120 ° C> 40 kJ / m ² ; (V) Impact resistance drop according to ISO 179 / leU after 500 hours Heat storage at 120 ° C <10%, (VI) elongation at break according to ISO 527-2 after 500 h of heat storage at 120 ° C> 2%; (VD) modulus of elasticity according to ISO 527-2> 5000 MPa; (VIII) impact strength according to ISO 197 / leU> 40 kJ / m ² ; (IX) yield stress according to ISO 5272> 80 MPa; (X) impact strength without heat storage according to ISO 197/1 eA> 6 kJ / m ² ; (XI) HDT B according to ISO 75 embodiment B> 190 ° C; (XU) flowability (MVR 275 ° C / 2, 16 kg applied force) according to ISO 1133 of> 20 cm ^3/10 min; XDI) no splintering behavior down to - 30 ° C in the puncture test after 500 h of heat storage at 120 ° C with 2 and 3 mm plate diameter according to ISO 6603/2; (XIV) density in the range of 1.2 to 1.5 g / cm ³ . Composite, consisting of at least a first molded part according to claim 7 or 8 and a second molded part, wherein the first molded part and the second Molded parts are rigidly connected to one another via at least a partial area of a surface α of the first molded part and a surface β of the second molded part via a welding area. 10. The method for producing a composite according to claim 9, wherein at least the partial area of the surface α with the partial area of the surface β below Formation of a welding area is welded. 11. Composite, obtainable by a method, wherein at least a partial area of a surface α of the first molded part defined in claim 1 is welded to a partial area of a surface β of the second molded part defined in claim 1 to form a welded area. 12. Composite according to one of claims 9 to 11 or method according to claim 10, wherein the welding area has at least a tensile strength in the range of 25 to 75 N / mm. 13. including laminate Ll) a molded part according to claim 8 or a composite according to one of claims 9, 11 and 12 or at least two of them as one Laminate component L 1, and L2) a polycondensate foam as a laminate component L2. 14. The method for producing the laminate according to claim 13, wherein the laminate component L2 is applied to the laminate component L1. 15. Laminate, obtainable by applying the laminate component L2 to the laminate component L1. 16. Recycling of a molding composition according to one of claims 1 to 6 or of a molding according to claim 8 or of a composite according to one of claims 9, 11 and 12 or a laminate according to one of claims 13 and 15 or at least two of them. 17. Recyclate, obtainable from a molding composition according to one of claims 1 to 6 or from a molded part according to claim 8 or from a composite according to one of claims 9, 11 and 12 or a laminate according to one of claims 13 and 15 or from at least two thereof , 18. Use of a molding composition according to one of claims 1 to 6 or a molding according to claim 8 or a composite according to one of claims 9, 11 and 12 or a laminate according to one of claims 13 and 15 or a recyclate from at least two of them for the production of Molded parts for the interior of motor vehicles. 19. Use of a stabilizer defined in claim 1 for setting one or more of the features defined in claim 8 in a molded part.