stray current resistant polyester compounds

Description

[0001] The present invention relates to the use of an aluminium salt of the organophosphorus compound according to formula (I) for achieving a CTI A of 600 according to IEC 60112-2010 in or in polyester-based products, as well as flame-resistant and tracking-resistant polyester-based compositions and products to be manufactured therefrom based on at least one polyester containing at least one aluminium salt of the organophosphorus compound of general formula (I) and at least one organic phosphinic acid salt and / or at least one diphosphinic acid salt, as well as a process for their manufacture. background

[0002] Polyesters, preferably polyalkylene terephthalates or polycycloalkylene terephthalates, and especially polybutylene terephthalate (PBT), are an important material for applications such as motor vehicles, components for the electrical and electronics industry, and household appliances due to their good mechanical stability, low water absorption, and good processability. Their excellent electrical insulation properties are particularly noteworthy, as they are largely retained even at elevated operating temperatures and in humid conditions, unlike, for example, polyamides. This is especially relevant for applications in fast-charging electric vehicles. When polyesters are used near live electrical components, flame-retardant materials are frequently employed to counteract the risk of fire caused by overheated wires or contacts.For this purpose, good self-extinguishing properties are particularly important, especially a UL94 V-0 classification according to Underwriters Laboratories Inc. Standard of Safety, "Test for Flammability of Plastic Materials for Parts in Devices and Appliances", pp. 14 to 18 Northbrook 1998. , demanded.

[0003] In addition to the increasingly demanded use of halogen-free flame retardants for ecological reasons, high impact strength combined with high strength and stiffness, lower density and higher tracking resistance according to IEC60112-2010 are also desirable in technical applications for polyester-based products.

[0004] The desire for maximum design freedom, and thus greater complexity in component geometry, combined with the cost-driven need for automatable and easily integrated series production processes, ideally also demands materials that can be joined using laser transmission welding [https: / / de.wikipedia.org / wiki / Laserdurchstrahlschwei%C3%9Fen]. For a laser-transparent joining partner, this requires a high laser transmittance at the laser wavelength used. The latter is a major challenge, especially for products based on flame-retardant polyesters, since flame retardants in particular scatter or even absorb the laser light, as is the case, for example, with some nitrogen-containing flame retardant synergists, but especially with antimony trioxide, which is commonly used as a synergist in halogen-containing flame retardants. State of the art

[0005] WO 2021 / 076169 A1 discloses in Table 4 polymer compositions containing polybutylene terephthalate, glass, aluminium methylphosphonate and melam.

[0006] DE 10 2017 215776 A1 teaches in Example 4 a composition containing 50 wt% polybutylene terephthalate, 30 wt% glass fibers and 20 wt% of a flame retardant combination FM 4 of aluminum salt of diethylphosphinic acid containing 10 mol% aluminum ethylbutylphosphinate and 5 mol% aluminum ethylphosphonate produced according to the process of US 7,420,007 B2 .

[0007] From WO 2012 / 139990 A1, tracking-resistant, flame-retardant, reinforced thermoplastic molding compounds based on polyalkylene terephthalates are known, which, in addition to a flame retardant made of nitrogen- or phosphorus-containing compounds, also contain a polyolefin from the group of polyethylene, polypropylene, and polypropylene copolymers. While these are characterized by increased tracking resistance, the use of polyolefins as an additive polymer carries the risk of compromising the advantages typical of polyalkylene terephthalates, particularly high surface tension and high color stability under thermal stress. Furthermore, the use of polyolefins—especially polyethylene—in polyalkylene terephthalate formulations also increases the risk of residues in the injection mold.

[0008] From EP 3 067 388 A1, flame-retardant polyester-based molding compounds containing aluminum tris(diethylphosphinate) and melamine cyanurate are known, in which the tracking resistance was improved by the addition of barium sulfate. However, the addition of solids such as barium sulfate, which do not melt under injection molding conditions, leads to a reduction in mechanical properties and also to a reduction in laser light transmission, which is particularly undesirable in laser transmission welding applications. Furthermore, despite the flame retardant, only a UL94 fire rating of V-1 could be achieved in the case of PBT in EP 3 067 388 A1.

[0009] Starting from the prior art, the object of the present invention was to provide flame-retardant, tracking-resistant, and glass-fiber-reinforced polyester-based thermoplastic molding compounds without the use of polyolefins and barium sulfate, and preferably without the use of nitrogen-containing, especially melamine-based, synergists, in order to achieve good mechanical properties and thereby achieve fire class V-0 according to UL94 at a maximum wall thickness of 0.8 mm. According to the invention, increased tracking resistance is understood to mean achieving a CTI A of 600 according to IEC 60112-2010. Ideally, this improved tracking resistance should not impair laser transmission and thus make its use in laser transmission welding more difficult or impossible. Good mechanical properties within the meaning of the present invention are characterized in particular by high values ​​in the DIN EN ISO 180to determine IZOD impact strength.

[0010] It has now been surprisingly found that phosphorus-containing aluminum salts of the general formula (I) wherein R stands for C 1 -C 12 -alkyl, achieve a CTI A of 600 according to IEC 60112-2010 in polyester-based products and, in combination with at least one organic metal phosphinate or diphosphinic acid salt in reinforced polyester-based compositions and products made therefrom, fulfill the complex task according to the invention with regard to flame protection, mechanical properties and especially laser transparency, if the mass fraction of the aluminum salt of general formula (I) is smaller than the mass fraction of organic metal phosphinate or diphosphinic acid salt to be used.

[0011] Surprisingly, it was also found that with the phosphorus-containing aluminum salts of general formula (I), even deviating from the standard IEC 60112-2010, the test was conducted even more demanding with 100 drops each on 3 test specimens (a total of 300 drops) instead of 50 drops each on 5 test specimens (250 drops), and the mean number of drops until the material failed due to a leakage current of > 0.5 A or ignition with subsequent continuous flame of the polyester-based test specimen was significantly higher than in the comparison examples without the phosphorus-containing aluminum salts of general formula (I). IZOD impact strength

[0012] The IZOD impact strength used in the present invention to obtain mechanical properties according to DIN EN ISO 180It can be used for rigid thermoplastic injection molding and extrusion compounds, thermosetting materials and thermotropic liquid crystalline polymers, as well as for filled and reinforced materials. The impact energy absorbed during fracture is used in this process. EC of an unnotched test specimen relative to the initial cross-sectional area of ​​the test specimen, according to the following equation: a iU = E c h ⋅ b with a iU = Impact strength, h = Thickness and b = Width.

[0013] The test specimens to be used can be manufactured according to the relevant molding compound standard or by pressing and injection molding, or taken from multi-purpose test specimens ( DIN EN ISO 527 [2] ). The dimensions of the unnotched test specimen used within the scope of the present invention according to DIN EN ISO 3167, Type A dimensions are: Length l = (80 ± 2) mm; Width b = (10.0 ± 0.2) mm; Thickness h = (4.0 ± 0.2) mm. https: / / wiki.polymerservice-merseburg.de / index.php / Schlagbiegeversuch Laser transmission

[0014] According to the invention, a high laser transmission is defined as a laser transmission of at least 8%, preferably at least 9%, measured on plates with a thickness of 1.5 mm using the LPKF TMG3 transmission meter from LPKF Laser & Electronics AG, Garbsen, Germany, at a laser wavelength of 980 nm. The LPKF TMG3 transmission meter is a certified, traceable, calibrated measuring instrument. Its measurement capability has been demonstrated within the framework of a statistical measurement system analysis (MSA). The device also complies with the requirements of Automotive standard IATF 16949 and is therefore directly qualified for standard-compliant quality assurance. The measurements within the scope of the present invention are based on the DVS Guideline 2243 (01 / 2014) "Laser beam welding of thermoplastic materials"The measurements are performed using test objects with dimensions of 125 mm × 13 mm × 1.5 mm in the near-infrared (NIR) range. The LPKF TMG3 transmission meter from LPKF Laser & Electronics AG is calibrated before measurements using a measurement standard generated according to DIN EN ISO / IEC 17025. Within the scope of the present invention, the measurements are performed at a laser wavelength of 980 nm. Trace current resistance

[0015] According to https: / / de.wikipedia.org / wiki / Kriechstromwiderstand Tracking resistance characterizes the insulation resistance of the surface (creepage distance) of insulating materials, particularly under the influence of moisture and contaminants. It defines the maximum tracking current that may occur under standardized test conditions (specified voltage, conductive layer material) in a defined test setup (electrode spacing, electrode shape). Tracking resistance is expressed as the CTI value ( English Comparative Tracking IndexThe CTI value indicates the voltage, measured in volts (V), up to which the test material shows no tracking when 50 drops of standardized electrolyte solutions (A or B, correspondingly KA or KB value) are applied. The measurement is taken on the surface, with one drop falling between two platinum electrodes every 30 ± 5 seconds. Failure criteria are a leakage current of > 0.5 A or ignition of the component. Details of the CTI measurement procedure are specified in IEC 60112.

[0016] Finally, according to the invention, polyester-based compositions should also show a V-0 classification with respect to the UL94 V-0 classification specified in WO 2021 / 076169 A1 at a maximum thickness of 0.8 mm, to be determined according to the UL94V method (Underwriters Laboratories Inc. Standard of Safety, "Test for Flammability of Plastic Materials for Parts in Devices and Appliances", pp. 14-18 Northbrook 1998), or at least show no significant deterioration compared to the prior art.

[0017] In the context of the present invention, "alkyl" refers to a straight-chain or branched saturated hydrocarbon group. In some embodiments, an alkyl group with 1 to 6 carbon atoms is used. This can be referred to as a "low alkyl group." Preferred alkyl groups are methyl (Me), ethyl (Et), propyl, in particular n-propyl and isopropyl, butyl, in particular n-butyl, isobutyl, sec-butyl, tert-butyl, pentyl groups, in particular n-pentyl, isopentyl, neopentyl, hexyl groups, and the like. The same applies to the term polyalkylene.

[0018] For the avoidance of doubt, it should be noted that the scope of the present invention encompasses all listed general or preferred definitions and parameters in any combination. This applies in particular to the specified mass fractions with regard to the compositions, uses, and processes according to the invention. The standards cited within the scope of this application refer to the version in force on the filing date of this invention. An aryl group (abbreviated: Ar) is an organic chemical residue with an aromatic backbone. Aryl is thus the general term for a monovalent group of atoms derived from aromatic hydrocarbons by the removal of a hydrogen atom bonded to the ring. Most aryl residues are derived from benzene (C₆H₆), the simplest aryl group being the phenyl group (Ph), (-C₆H₅).Aryl residues can occur either as a fragment of a molecule or as an unstable free radical. Subject of the invention

[0019] The subject matter of the invention is the use of aluminium salts of general formula (I) wherein R represents C 1 -C 12 alkyl, preferably methyl, ethyl, isopropyl or iso-butyl, tert-butyl or n-butyl, particularly preferably ethyl or methyl, most preferably methyl, to achieve a CTI A of 600 according to IEC 60112-2010 in or for polyester-based products, preferably in or for polyalkylene terephthalate or polycycloalkylene terephthalate-based products, in particular in or for polybutylene terephthalate (PBT), polyethylene terephthalate (PET) or poly-1,4-cyclohexanedimethanol terephthalate-based products. For clarification, it should be noted that in the case of products based on polybutylene terephthalate (PBT), polyethylene terephthalate (PET) or poly-1,4-cyclohexanedimethanol terephthalate, this is synonymous with products based on polybutylene terephthalate (PBT), polyethylene terephthalate (PET) or poly-1,4-cyclohexanedimethanol terephthalate.

[0020] The present invention relates primarily to Compositions containing A) to 100 mass parts of polyalkylene terephthalate or polycycloalkylene terephthalate, B) 1 to 80 mass parts, preferably 2 to 60 mass parts, particularly preferably 3 to 30 mass parts, particularly preferably 5 to 20 mass parts of at least one aluminium salt of general formula (I) wherein R represents C1-C12 alkyl, preferably methyl, ethyl, isopropyl or isobutyl, tert-butyl or n-butyl, particularly preferably ethyl or methyl, most preferably methyl, and C) 5 to 120 mass parts, preferably 7 to 80 mass parts, particularly preferably 8 to 60 mass parts, particularly preferably 10 to 50 mass parts of at least one organic phosphinic acid salt of formula (II) and / or at least one diphosphinic acid salt of formula (III) and / or their polymers, wherein R1< , R2< are the same or different and represent a linear or branched C1-C6 alkyl, and / or C6-C14 aryl, R3< represents a linear or branched C1-C10 alkylene, C6-C10 arylene or C1-C6 alkyl-C6-C10 arylene or C6-C10 aryl-C1-C6 alkylene, M represents aluminum, zinc or titanium, m represents an integer from 1 to 4, n represents an integer from 1 to 3, x represents 1 and 2, wherein n, x and m in formula (III) can simultaneously only assume such integers that the diphosphinic acid salt of formula (III) as a whole is uncharged, and D) 3 to 300 mass parts, preferably 5 to 200 mass parts, especially preferably 10 to 120 mass fractions, in particular preferably 15 to 90 mass fractions of at least one glass-based filler and / or reinforcing material, with the proviso that component B) is present in lower mass fractions than component C).

[0021] The invention also relates to products based on the compositions according to the invention, in particular products for electromobility, for household appliances and in the electronics and electrical sector.

[0022] The preparation of compositions based on polyalkylene terephthalate or polycycloalkene terephthalate according to the invention, in particular compositions based on PBT, PET, or poly-1,4-cyclohexanedimethanol terephthalate, for use in products for electromobility, household appliances, and the electronics and electrical sectors, is carried out by mixing the components A), B), C), and D) used as starting materials in at least one mixing tool in the mass fraction ratios specified above. The mixing process yields molding compounds based on the compositions according to the invention as intermediate products. These molding compounds can consist exclusively of components A), B), C), and D), or can additionally contain at least one further component E). If laser-transparent compositions are to be provided, further components E) must be selected such that laser-absorbing additives are not required.

[0023] Furthermore, the present invention relates to a Proceedings for the manufacture of products, preferably products for electromobility, household appliances and in the electronics and electrical sector, by combining component A) 100 mass parts of polyalkylene terephthalate or polycycloalkene terephthalate, in particular polybutylene terephthalate, polyethylene terephthalate or poly-1,4-cyclohexanedimethanol terephthalate, with B) 1 to 80 mass fractions, preferably 2 to 60 mass fractions, particularly preferably 3 to 30 mass fractions, particularly preferably 5 to 20 mass fractions of at least one aluminium salt of general formula (I) wherein R represents C1-C12 alkyl, preferably methyl, ethyl, isopropyl or isobutyl, tert-butyl or n-butyl, particularly preferably ethyl or methyl, most preferably methyl, and C) 5 to 120 mass parts, preferably 7 to 80 mass parts, particularly preferably 8 to 60 mass parts, particularly preferably 10 to 50 mass parts of at least one organic phosphinic acid salt of formula (II) and / or at least one diphosphinic acid salt of formula (III) and / or their polymers, wherein R1< , R2< are the same or different and represent a linear or branched C1-C6 alkyl, and / or C6-C14 aryl, R3< represents a linear or branched C1-C10 alkylene, C6-C10 arylene or C1-C6 alkyl-C6-C10 arylene or C6-C10 aryl-C1-C6 alkylene, M represents aluminum, zinc or titanium, m represents an integer from 1 to 4, n represents an integer from 1 to 3, x represents 1 and 2, wherein n, x and m in formula (III) can simultaneously only assume such integers that the diphosphinic acid salt of formula (III) as a whole is uncharged, with D) 3 to 300 mass parts, preferably 5 to 200 mass parts, especially preferably in 10 to 120 mass fractions, in particular preferably 15 to 90 mass fractions of at least one glass-based filler and / or reinforcing material and, if necessary, mixed or blended with further additives in at least one mixing unit and finally processed by injection molding, provided that component B) is used in lower mass proportions than component C).

[0024] Preferably, the components are kneaded, compounded, extruded, or rolled into a molding compound. This mixing preferably takes place at a temperature in the range of 230 to 300°C, particularly preferably by compounding on a co-rotating twin-screw extruder or Buss kneader. It can be advantageous to premix individual components.

[0025] The injection molding process is characterized by the fact that the raw material, preferably in granular form, is melted (plasticized) in a heated cylindrical cavity and injected under pressure into a temperature-controlled cavity. After the mass has cooled (solidified), the injection-molded part is demolded. One distinguishes

[0026] 1. Plasticizing / Melting 2. Injection phase (filling process) 3. Holding phase (due to thermal contraction during crystallization) 4. Demolding.

[0027] An injection molding machine consists of a clamping unit, the injection unit, the drive, and the control system. The clamping unit includes fixed and movable mounting plates for the mold, an end plate, as well as columns and the drive for the movable mold mounting plate (toggle joint or hydraulic clamping unit).

[0028] An injection unit comprises the electrically heated cylinder, the screw drive (motor, gearbox), and the hydraulics for moving the screw and injection unit. The injection unit's function is to melt, meter, inject, and compress the powder or granules (due to contraction). The problem of melt backflow within the screw (leakage) is solved by non-return valves.

[0029] In the injection mold, the flowing molten metal is dissolved, cooled, and thus the product to be manufactured is produced. This always requires two mold halves. The following functional complexes are distinguished in injection molding: Gating system, mold-forming inserts, venting, machine and force absorption, demolding system and motion transmission, temperature control

[0030] The present invention therefore also relates to products obtainable by injection molding of the compositions according to the invention. Further preferred embodiments of the invention

[0031] In a further preferred embodiment, the invention further relates to compositions and products based thereon comprising, in addition to components A) to D), at least one further component E). various additives from components B), C) and D), preferably to 0.01 to 100 mass fractions, particularly preferably to 0.05 to 50 mass fractions, most preferably to 0.1 to 30 mass fractions, each based on 100 mass fractions of component A) with the proviso that laser-absorbing additives are omitted if it is necessary to maintain laser transparency. Component A)

[0032] The polyalkylene terephthalates or polycycloalkylene terephthalates used as component A) according to the invention can be produced by various processes, synthesized from different building blocks, and, depending on the specific application, combined alone or in combination with processing aids, stabilizers, polymeric alloying partners (e.g., elastomers), or reinforcing materials (such as mineral fillers or glass fibers), and optionally further additives, to form materials with specifically tailored combinations of properties. Blends with proportions of other polymers are also suitable, optionally in which one or more compatibilizers can be used. The properties of the polymers can be improved as required by the addition of elastomers.

[0033] Preferred polyalkylene terephthalates or polycycloalkylene terephthalates can be prepared from terephthalic acid (or its reactive derivatives) and aliphatic or cycloaliphatic diols with 2 to 10 carbon atoms by known methods (Plastics Handbook, Vol. VIII, pp. 695-743, Karl Hanser Verlag, Munich 1973).

[0034] Preferred polyalkylene terephthalates or polycycloalkylene terephthalates contain at least 80 mol%, preferably at least 90 mol%, based on the dicarboxylic acid, terephthalic acid residues and at least 80 mol%, preferably at least 90 mol%, based on the diol component, 1,4-cyclohexanedimethanol and / or ethylene glycol and / or propanediol-1,3- (in the case of polypropylene terephthalate) and / or butanediol-1,4- residues.

[0035] Preferred polyalkylene terephthalates or polycycloalkylene terephthalates may contain, in addition to terephthalic acid residues, up to 20 mol% of residues of other aromatic dicarboxylic acids with 8 to 14 carbon atoms or residues of aliphatic dicarboxylic acids with 4 to 12 carbon atoms, in particular residues of phthalic acid, isophthalic acid, naphthalene-2,6-dicarboxylic acid, 4,4'-diphenyldicarboxylic acid, succinic acid, adipic acid, sebacic acid, azelaic acid, cyclohexanedioacetic acid, cyclohexanedicarboxylic acid.

[0036] Preferred polyalkylene terephthalates or polycycloalkylene terephthalates may contain, in addition to 1,4-cyclohexanedimethanol or ethylene glycol or 1,3-propanediol or 1,4-butanediol-1,4, up to 20 mol% of other aliphatic diols with 3 to 12 carbon atoms or up to 20 mol% of cycloaliphatic diols with 6 to 21 carbon atoms, preferably residues of propanediol-1,3, 2-ethylpropanediol-1,3, neopentyl glycol, pentanediol-1,5, hexanediol-1,6, 3-methylpentanediol-2,4, 2-methylpentanediol-2,4, 2,2,4-trimethylpentanediol-1,3, 2,2,4-trimethylpentanediol-1,5, 2-ethylhexanediol-1,3, 2,2-diethylpropanediol-1,3, hexanediol-2,5, I,4-di-(ß-hydroxyethoxy)-benzene, 2,2-bis-(4-hydroxycyclohexyl)-propane, 2,4-dihydroxy-1,1,3,3-tetramethyl-cyclobutane, 2,2-bis-(3-β-hydroxyethoxyphenyl)-propane and 2,2-bis-(4-hydroxypropoxyphenyl)propane.

[0037] Particularly preferred are polyalkylene terephthalates or polycycloalkylene terephthalates produced solely from terephthalic acid and its reactive derivatives, in particular its dialkyl esters, and 1,4-cyclohexanedimethanol and / or ethylene glycol and / or 1,3-propanediol and / or 1,4-butanediol, especially preferably poly-1,4-cyclohexanedimethanol terephthalate, polyethylene terephthalate and polybutylene terephthalate and mixtures thereof.

[0038] Preferred polyalkylene terephthalates or polycycloalkylene terephthalates also include copolyesters prepared from at least two of the above-mentioned acid components and / or from at least two of the above-mentioned alcohol components. Particularly preferred copolyesters are poly(ethylene glycol / butanediol-1,4) terephthalates.

[0039] Polyalkylene terephthalates or polycycloalkylene terephthalates generally possess an intrinsic viscosity in the range of 30 to 150 cm³ / g, preferably in the range of 40 to 130 cm³ / g, and particularly preferably in the range of 50 to 100 cm³ / g, each measured in phenol / o-dichlorobenzene (1:1 parts by weight) at 25°C. The intrinsic viscosity IV, also known as the Staudinger index or limiting viscosity, is proportional to the mean molecular mass according to the Mark-Houwink equation and is the extrapolation of the viscosity number VN for the case of negligible polymer concentrations. It can be estimated from series of measurements or by using suitable approximation methods (e.g., Billmeyer). The VN [ml / g] is obtained from measuring the solution viscosity in a capillary viscometer, for example, an Ubbelohde viscometer. Solution viscosity is a measure of the average molecular weight of a plastic.The determination is carried out on dissolved polymer using different solvents (formic acid, m-cresol, tetrachloroethane, phenol, 1,2-dichlorobenzene, etc.) and concentrations. The viscosity number (VN) allows for monitoring the processing and performance properties of plastics. Thermal stress on the polymer, aging processes, or the effects of chemicals, weathering, and light can be investigated through comparative measurements. The method is standardized for common plastics and, within the scope of the present invention, according to [reference to relevant invention]. DIN ISO 1628-5 for polyester. See also: http: / / de.wikipedia.org / wikiNiskosimetrie and "http: / / de.wikipedia.org / wiki / Mark-Houwink-Gleichung".

[0040] The polyalkylene terephthalates or polycycloalkylene terephthalates to be used as component A) according to the invention can also be used in mixtures with other polyesters and / or other polymers.

[0041] The polyalkylene terephthalates or polycycloalkylene terephthalates to be used as component A) can have conventional additives, in particular demolding agents, added to the melt during compounding, whereby the person skilled in the art understands compounding (from the English: Compound = The term "compounding" is understood as a term from plastics engineering, synonymous with "plastics processing," and describes the refinement process of plastics through the addition of aggregates (fillers, additives, etc.) to specifically optimize their property profiles. Compounding preferably takes place in extruders, particularly preferably in co-rotating twin-screw extruders, counter-rotating twin-screw extruders, planetary roller extruders, or co-kneaders, and includes the process operations of conveying, melting, dispersing, mixing, degassing, and pressure build-up.

[0042] Preferably, the polyester to be used as component A) is polyalkylene terephthalate or polycycloalkylene terephthalate, particularly preferably polyethylene terephthalate (PET) [CAS No. 25038-59-9] or polybutylene terephthalate [CAS No. 24968-12-5], especially polybutylene terephthalate (PBT).

[0043] Alternatively, the polyester to be used as component A) is a polycycloalkylene terephthalate, in particular poly-1,4-cyclohexanedimethanol terephthalate [CAS No. 25037-99-4]. Component B)

[0044] As component B) to be used according to the invention, at least one aluminium salt of the general formula (I) is used, wherein R stands for C 1 -C 12 -alkyl, preferably for Methyl, Ethyl, Isopropyl or iso-Butyl, tert-Butyl or n-Butyl, particularly preferably for Ethyl or Methyl, most preferably for Methyl.

[0045] These aluminum salts of organic phosphorus compounds with the general formula (I), which are to be used as component B), can be prepared by various methods and synthesized from different building blocks. Within the scope of the present invention, the following method is used to prepare the compound (1a) with R = methyl, which is to be used preferably according to the invention:

[0046] A reaction vessel is charged with 83 g of methylphosphonic acid and heated to 120°C. An intermediate prepared from 50 g of methylphosphonic acid and 35.4 g of aluminum tris(isopropoxide) is added to the reaction vessel in the presence of water. The resulting solution, containing methylphosphonic acid and aluminum methylphosphonate as intermediates in a molar ratio of 5:1, is heated to 240°C with mechanical stirring. Stirring is continued at 240°C for approximately 30 minutes until a solid forms. Then, 500 ml of water are added, and this mixture is stirred for 16 h, during which time a uniform slurry is formed. The product is then filtered, washed with 750 ml of water, and dried. The result is 64.3 g of the product of formula (1a), which is used as component B) in the preferred embodiment, as fine, colorless crystals in a yield of 93%.The empirical formula (1a) represents repeating monomer units (i.e., coordination units) of a coordination polymer that exists in crystalline form.

[0047] Further methods, in particular for R ≠ Methyl, can be found in WO 2020 / 132075 A1, the contents of which are fully encompassed by the present invention.

[0048] Component B) according to formula (1a) is particularly preferred, with a molar ratio of phosphorus to aluminum of 4:1, to be determined by ICP-OES elemental analysis, wherein needle-shaped crystals are particularly preferred. See Example 1 in WO 2021 / 076169 A1. For ICP-OES, see: https: / / www.itmc.rwthaachen.de / go / id / gden Component C)

[0049] Component C) according to the invention contains at least one phosphinic acid salt of formula (II) and / or at least one diphosphinic acid salt of formula (III) and / or their polymers. Phosphinic acid salts of formula (II) and diphosphinic acid salts of formula (III) are also referred to as phosphinates within the scope of the present invention.

[0050] Preferably, M in formulas (II) or (III) represents aluminum or zinc. Preferably, R1, R2 in formulas (II) and (III) are the same or different and represent C1-C6 alkyl, linear or branched, and / or phenyl. Particularly preferably, R1, R2 are the same or different and represent methyl, ethyl, n-propyl, isopropyl, n-butyl, tert-butyl, n-pentyl, and / or phenyl.

[0051] Preferably, R 3< in formula (III) means methylene, ethylene, n-propylene, isopropylene, n-butylene, tert-butylene, n-pentylene, n-octylene, n-dodecylene, phenylene, naphthylene, methylphenylene, ethylphenylene, tert-butylphenylene, methylnaphthylene, ethylnaphthylene, tert-butylnaphthylene, phenylmethylene, phenylpropylene, or phenylbutylene. Particularly preferably, R 3< means phenylene or naphthylene. Suitable phosphinates are described in WO-A 97 / 39053, the contents of which, with respect to the phosphinates, are included in the present application. Particularly preferred phosphinates within the meaning of the present invention are aluminium and zinc salts of dimethyl phosphinate, ethyl methyl phosphinate, diethyl phosphinate and methyl n-propyl phosphinate, as well as mixtures thereof.

[0052] Preferably, m in formula (II) represents 2 and 3, particularly preferably 3.

[0053] Preferably, n in formula (III) represents 1 and 3, particularly preferably 3.

[0054] Preferably, x in formula (III) represents 1 and 2, and especially 2.

[0055] Component C) Aluminium tris(diethylphosphinate) [CAS No. 225789-38-8] is particularly preferred, which is offered, for example, by Clariant International Ltd. Muttenz, Switzerland under the trade name Exolit ®< OP1230 or Exolit ®< OP1240.

[0056] According to the invention, component B) is used in smaller mass fractions than component C). Component D)

[0057] The polymer compositions according to the invention contain as component D) at least one glass-based Filler and / or reinforcing material. Mixtures of two or more different glass-based fillers and / or reinforcing materials can also be used.

[0058] Preferably, component D) glass is used according to DIN1259-1Glass is particularly preferred as solid or hollow glass spheres, glass fibers, ground glass or aluminium borosilicate glass with an alkali content of 1% (E-glass) [CAS No. 65997-17-3].

[0059] Regarding the glass fibers preferably used according to the invention, the person skilled in the art distinguishes according to "http: / / de.wikipedia.org / wiki / Faser-Kunststoff-Verbund"Cut fibers, also known as short fibers, have a length of 0.1 to 1 mm; long fibers have a length of 1 to 50 mm; and continuous fibers have a length L > 50 mm. Short fibers are preferably used in injection molding and can be processed directly with an extruder. Long fibers can also be processed in extruders. Continuous fibers are used as rovings or woven fabrics in fiber-reinforced plastics. Products made with continuous fibers achieve the highest stiffness and strength values. Ground glass fibers are also available, with a typical length after grinding of 70 to 200 µm.

[0060] According to the invention, glass fibers to be used as component D) are preferably cut long glass fibers with an average initial length in the range of 1 to 50 mm, particularly preferably in the range of 1 to 10 mm, most preferably in the range of 2 to 7 mm, wherein the initial length refers to the length before any processing, in particular in a compounder.

[0061] Preferred optical fibers to be used as component D) have a mean fiber diameter in the range of 7 to 18 µm, particularly preferably in the range of 9 to 15 µm. Scanning electron microscopy (SEM) can be used as a possible method for determining the fiber diameters ( https: / / de.wikipedia.org / wiki / Rasterelektronenmikroskop ).

[0062] The glass fibers preferably used as component D) are, in a preferred embodiment, equipped with a suitable sizing system or an adhesion promoter or adhesion promoter system. A silane-based sizing system or adhesion promoter is preferably used. Particularly preferred silane-based adhesion promoters for treating the glass fibers preferably used as component D) are silane compounds of the general formula (IV) (X-(CH₂)q)k-Si-(O-CrH₂R+I)4-k (IV) wherein X stands for NH2, carboxyl, HO, or other pigments. qin formula (IV) represents an integer from 2 to 10, preferably 3 to 4, rin formula (IV) represents an integer from 1 to 5, preferably 1 to 2 and kin formula (IV) represents an integer from 1 to 3, preferably 1.

[0063] Particularly preferred adhesion promoters are silane compounds from the group consisting of aminopropyltrimethoxysilane, aminobutyltrimethoxysilane, aminopropyltriethoxysilane, aminobutyltriethoxysilane and the corresponding silanes which contain a glycidyl or a carboxyl group as substituent X in formula (IV), wherein carboxyl groups are particularly preferred.

[0064] For the treatment of the glass fibers to be preferably used as component D), the adhesion promoter, preferably the silane compounds according to formula (IV), is used preferably in amounts of 0.05 to 2 wt.%, particularly preferably in amounts of 0.25 to 1.5 wt.% and most preferably in amounts of 0.5 to 1 wt.%, each based on 100 wt.% component D).

[0065] The glass fibers preferably used as component D) may be shorter in the composition or product than the originally used glass fibers due to processing. Thus, the arithmetic mean of the glass fiber length, determined by high-resolution X-ray computed tomography, is often only in the range of 150 µm to 300 µm after processing.

[0066] According to "http: / / www.rg.de / wiki / Glasfasern" Glass fibers are produced using melt spinning processes (nozzle drawing, rod drawing, and nozzle blowing). In the nozzle drawing process, the hot glass mass flows through hundreds of nozzle holes in a platinum spinning plate, utilizing gravity. The elementary fibers can be drawn to unlimited lengths at a speed of 3–4 km / minute.

[0067] Experts distinguish between different types of fiberglass, some of which are listed here: E-glass, the most widely used material with an optimal price-performance ratio (E-glass from R&G) with a composition according to https: / / www.rg.de / wiki / Glasfasern 53-55% SiO₂, 14-15% Al₂O₃, 6-8% B₂O₃, 17-22% CaO, <5% MgO, <1% K₂O or Na₂O and approx. 1% other oxides; H-glass, hollow glass fibers for reduced weight (R&G hollow glass fiber fabric 160 g / m²< and 216 g / m²<); R, S-glass, for increased mechanical requirements (S2-glass from R&G); D-glass, borosilicate glass for increased electrical requirements; C-glass, with increased chemical resistance; quartz glass, with high temperature resistance.

[0068] Further examples can be found under " http: / / de.wikipedia.org / wiki / Glasfaser E-glass fibers have become most important for reinforcing plastics. The "E" in E-glass stands for electro-glass, as it was originally used primarily in the electrical industry.

[0069] For the production of E-glass, glass melts are made from pure quartz with additives of limestone, kaolin, and boric acid. Besides silicon dioxide, they contain varying amounts of different metal oxides. The composition determines the properties of the products. According to the invention, at least one type of glass fiber from the group consisting of E-glass, H-glass, R,S-glass, D-glass, C-glass, and quartz glass is preferably used, with glass fibers made from E-glass being particularly preferred.

[0070] E-glass fibers are the most widely used reinforcing material. Their strength properties are comparable to those of metals (e.g., aluminum alloys), although the specific gravity of laminates containing E-glass fibers is lower than that of the metals. E-glass fibers are non-combustible, heat-resistant up to approximately 400°C, and resistant to most chemicals and weathering.

[0071] However, non-fibrous and non-foamed ground glass with a properties determined by laser diffractometry according to is also preferred as component D). ISO 13320 The particle size distribution to be determined is set using a d90 in the range of 5 to 250 µm, preferably in the range of 10 to 150 µm, particularly preferably in the range of 15 to 80 µm, and most preferably in the range of 16 to 25 µm. Regarding the d90 values, their determination, and their significance, reference is made to Chemie Ingenieur Technik (72) pp. 273-276, 3 / 2000, Wiley-VCH Verlags GmbH, Weinheim, 2000, according to which the d90 value is the particle size below which 90% of the particle quantity lies.

[0072] According to the invention, preferably non-fibrous and non-foamed ground glass of a particulate, non-cylindrical shape has a length-to-thickness ratio of less than 5, preferably less than 3, and particularly preferably less than 2, as determined by scanning electron microscopy. A value of zero is, of course, excluded.

[0073] The non-foamed and non-fibrous ground glass to be used as component D) in one embodiment is further characterized in that it does not have the glass geometry typical for fibrous glass with a cylindrical or oval cross-section and a length-to-diameter ratio (L / D ratio) greater than 5, which can be determined by means of scanning electron microscopy.

[0074] The non-foamed and non-fibrous ground glass to be used as component D) in one embodiment according to the invention is preferably obtained by grinding glass with a mill, preferably a ball mill, and particularly preferably with subsequent classification or sieving. Preferred starting materials for grinding the non-fibrous and non-foamed ground glass to be used as component D) in one embodiment also include glass waste, such as that which arises in particular during the manufacture of glass products as an undesired by-product and / or as a main product that does not meet specifications (so-called off-spec material). This includes in particular waste, recycled, and broken glass, such as that which can arise particularly during the manufacture of window or bottle glass, as well as during the manufacture of glass-containing fillers and reinforcing materials, especially in the form of so-called melt cakes.The glass can be colored, but uncolored glass is preferred as the starting material for use as component D). Component E)

[0075] Component E) comprises at least one further additive, different from components B), C), and D), provided that laser-absorbing additives are omitted if maintaining laser transparency is required. Preferred additives for use as component E) are antioxidants, thermal stabilizers, UV stabilizers, gamma-ray stabilizers, hydrolysis stabilizers, antistatic agents, emulsifiers, nucleating agents, plasticizers, processing aids, impact modifiers, lubricants and / or demolding agents, flow aids or elastomer modifiers, chain-extending additives, flame retardants from components B) and C), and various fillers, reinforcing agents, or colorants from component D). The additives can be used alone or in mixtures or in the form of masterbatches.In the case of laser-transparent products, the additives to be used as component E) must be selected such that no laser absorbers, such as carbon black, are used. Laser-absorbing additives are sufficiently well known to those skilled in the art.

[0076] Component E) preferably to be used Thermostabilizersare selected from the group of sulfur-containing stabilizers, in particular sulfides, dialkylthiocarbamates or thiodipropionic acids, also those selected from the group of copper salts, here in particular copper(I) iodide, which are preferably used in combination with potassium iodide and / or sodium hypophosphite NaH 2 PO 2, furthermore sterically hindered amines, in particular tetramethylpiperidine derivatives, aromatic secondary amines, in particular diphenylamines, hydroquinones, substituted resorcinols, salicylates, benzotriazoles and benzophenones, furthermore sterically hindered phenols and aliphatic or aromatically substituted phosphites as well as variously substituted representatives of these groups.

[0077] Among the sterically hindered phenols, those with at least one 3-tert-butyl-4-hydroxy-5-methylphenyl and / or at least one 3,5-di-(tert-butyl-4-hydroxyphenyl) building block are preferably used, wherein 1,6-hexanediol bis[3-(3,5-di-tert-butyl-4-hydroxyphenyl) propionate] [CAS No. 35074-77-2] (Irganox® < 259 of BASF SE, Ludwigshafen, Germany), pentaerythril tetrakis-[3-(3,5-di-tert-butyl-4-hydroxyphenyl) propionate] [CAS No. 6683-19-8] (Irganox® < 1010 of BASF SE) and 3,9-Bis[2-[3-(3-tert-butyl-4-hydroxy-5-methylphenyl)propionyloxy]-1,1-dimethylethyl]-2,4,8,10-tetraoxa-spiro[5,5]undecane [CAS No. 90498-90-1] (ADK Stab ®< AO 80) are particularly preferred. ADK Stab ®< AO 80 is a commercial product of Adeka-Palmerole SAS, Mulhouse, France.

[0078] Among the aliphatic or aromatically substituted phosphites, bis(2,4-dicumylphenyl)-pentaerythritol diphosphite [CAS No. 154862-43-8] is preferred, which is offered, for example, by Dover Chemical Corp., Dover, USA under the trade name Doverphos®< S9228, and tetrakis(2,4-di-tert-butylphenyl)-1,1-biphenyl-4,4'-diylbisphosphonite [CAS No. 38613-77-3] is used, which can be obtained, for example, as Hostanox®< P-EPQ from Clariant International Ltd., Muttenz, Switzerland.

[0079] The thermostabilizers to be used as component E) are preferably used in proportions of 0.01 to 2 mass fractions, and particularly preferably in proportions of 0.05 to 1 mass fraction, in each case based on 100 mass fractions of component A).

[0080] to be used as component E) UV stabilizersPreferably substituted resorcinols, salicylates, benzotriazoles and benzophenones, HALS derivatives ("Hindered Amine Light Stabilizers") containing at least one 2,2,6,6-tetramethyl-4-piperidyl unit or benzophenones are used.

[0081] The UV stabilizers to be used as component E) are preferably used in proportions of 0.01 to 2 mass fractions, and particularly preferably in proportions of 0.1 to 1 mass fraction, in each case based on 100 mass fractions of component A).

[0082] to be used as component E) colorantPreferably inorganic pigments are used, in particular ultramarine blue, bismuth vanadate, iron oxide, titanium dioxide, zinc sulfide, tin-titanium-zinc oxides [CAS No. 923954-49-8], furthermore organic colorants, preferably phthalocyanines, quinacridones, benzimidazoles, in particular Ni-2-hydroxy-napthyl-benzimidazole [CAS No. 42844-93-9] and / or pyrimidine azo-benzimidazole [CAS No. 72102-84-2] and / or Pigment Yellow 192 [CAS No. 56279-27-7], also Perylene, Anthraquinones, in particular CI Solvent Yellow 163 [CAS No. 13676-91-0], whereby this list is not exhaustive and whereby the selection of colorants must be made with particular consideration of the requirements for laser transmission or laser absorption behavior.

[0083] In a particular embodiment, preferably in the case of a laser-absorbing component, carbon black and / or nigrosine can also be used as colorants.

[0084] to be used as component E) Nucleating agent Sodium or calcium phenylphosphinate, aluminium oxide or silicon dioxide, and especially talc, are preferably used, although this list is not exhaustive.

[0085] to be used as component E) Flow aidsCopolymers of at least one α-olefin with at least one methacrylic acid ester or acrylic acid ester of an aliphatic alcohol are preferably used. Copolymers in which the α-olefin contains ethene and / or propene units and the methacrylic acid ester or acrylic acid ester, as the alcohol component, contains linear or branched alkyl groups with 6 to 20 carbon atoms are particularly preferred. Acrylic acid (2-ethyl)hexyl ester is especially preferred. Copolymers suitable as flow aids are characterized not only by their composition but also by their low molecular weight. Accordingly, copolymers with a minimum flow rate (MFI) of at least 100 g / 10 min, preferably at least 150 g / 10 min, and particularly preferably at least 300 g / 10 min, measured at 190°C and a load of 2.16 kg, are particularly suitable for the compositions according to the invention.The MFI, Melt Flow Index, is used to characterize the flow of a thermoplastic melt and is subject to standards. ISO 1133 or ASTM D 1238 . In particular, a copolymer of ethene and acrylic acid (2-ethyl)hexyl ester with MFI 550, known as Lotryl ®< 37EH550, is preferably used as a flow aid.

[0086] to be used as component E) chain-extending additives and as Hydrolysis stabilizersPreferably, di- or multifunctional branching or chain-extending additives containing at least two branching or chain-extending functional groups per molecule are used. Low-molecular-weight, oligomeric, or polymeric compounds are preferred as branching or chain-extending additives, provided they possess at least two chain-extending functional groups per molecule that can react with alcohol groups and / or amide groups and / or carboxylic acid groups. Preferably, chain-extending functional groups include isocyanates, carbodiimides, alcohols, epoxides, maleic anhydride, oxazolines, oxazines, and oxazolones, with epoxides and carbodiimides being particularly preferred.

[0087] Particularly preferred di- or multifunctional branching or chain-extending additives are diepoxides based on diglycidyl ethers (bisphenol and epichlorohydrin), on amine epoxy resin (aniline and epichlorohydrin), on diglycidyl esters (cycloaliphatic dicarboxylic acids and epichlorohydrin) individually or in mixtures, as well as 2,2-bis[p-hydroxyphenyl]-propane diglycidyl ether, bis-[p-(N-methyl-N-2,3-epoxy-propylamino)-phenyl]-methane and epoxidized fatty acid esters of glycerol, containing at least two epoxide groups per molecule.

[0088] Particularly preferred di- or multifunctional branching or chain-extending additives are glycidyl ethers, most preferably bisphenol A diglycidyl ether [CAS No. 98460-24-3] or epoxidized fatty acid esters of glycerol, as well as most preferably epoxidized soybean oil [CAS No. 8013-07-8] and / or epoxidized linseed oil [CAS No. 8016-11-3], and especially preferably carbodiimides, wherein polymeric carbodiimides such as poly-2,4,6-triisopropyl 1,3-dicarbodiimides and carbodiimides containing a pentaerythrite building block, in particular 14,14',15,15'-tetradehydro-7,7'-spirobi[dibenzo[b,g][1,9,4,6]dioxadiaza-cyclododecine], [CAS No. 1231148-36-9] within the class of carbodiimides are particularly favored.

[0089] Preferably to be used as component E) Plasticizers These include phthalic acid dioctyl esters, phthalic acid dibenzyl esters, phthalic acid butylbenzyl esters, hydrocarbon oils or N-(n-butyl)benzenesulfonamide.

[0090] Preferably to be used as component E) Elastomer modifiers include, among other things, one or more graft polymers of E.1 5 to 95 wt.%, preferably 30 to 90 wt.%, of at least one vinyl monomer and E.2 95 to 5 wt.%, preferably 70 to 10 wt.% of one or more graft bases with glass transition temperatures < 10°C, preferably < 0°C, particularly preferably < -20°C, wherein the wt.% refer to 100 wt.% elastomer modifier.

[0091] The graft base E.2 generally has a laser diffractometry result according to ISO 13320 The mean particle size to be determined is a d50 value of 0.05 to 10 µm, preferably 0.1 to 5 µm, particularly preferably 0.2 to 1 µm.

[0092] Monomers to E.1 are preferably mixtures of E.1.1 50 to 99 wt.% vinyl aromatics and / or core-substituted vinyl aromatics, in particular styrene, α-methylstyrene, p-methylstyrene, p-chlorostyrene, and / or methacrylic acid (C1-C8) alkyl esters, in particular methyl methacrylate or ethyl methacrylate, and E.1.2 1 to 50 wt.% vinyl cyanides, preferably unsaturated nitriles, in particular acrylonitrile and methacrylonitrile, and / or (meth)acrylic acid (C 1 -C 8 )-alkyl esters, in particular methyl methacrylate, glycidyl methacrylate, n-butyl acrylate, t-butyl acrylate, and / or derivatives, in particular anhydrides and imides of unsaturated carboxylic acids, in particular maleic anhydride or N-phenyl maleimide, wherein the wt.% of E.1.1 and E.1.2 refer to 100 wt.% elastomer modifier.

[0093] Preferred monomers E.1.1 are to be selected from at least one of the monomers styrene, α-methylstyrene, and methyl methacrylate; preferred monomers E.1.2 are to be selected from at least one of the monomers acrylonitrile, maleic anhydride, glycidyl methacrylate, and methyl methacrylate. Particularly preferred monomers are E.1.1 styrene and E.1.2 acrylonitrile.

[0094] Suitable graft bases for the graft polymers used in the elastomer modifiers include, for example, diene rubbers, EPDM rubbers (i.e., those based on ethylene / propylene and, if applicable, diene), as well as acrylate, polyurethane, silicone, chloroprene, and ethylene / vinyl acetate rubbers. EPDM stands for ethylene-propylene-diene rubber.

[0095] Preferred graft bases E.2 are diene rubbers, in particular based on butadiene, isoprene, etc., or mixtures of diene rubbers or copolymers of diene rubbers or their mixtures with further copolymerizable monomers, in particular according to E.1.1 and E.1.2, provided that the glass transition temperature of component E.2 is <10°C, preferably <0°C, particularly preferably <-10°C.

[0096] Particularly preferred graft bases E.2 are ABS polymers (emulsion, bulk, and suspension ABS), where ABS stands for acrylonitrile butadiene styrene, as described, for example, in DE-A 2 035 390 or in DE-A 2 248 242 or in Ullmann, Encyclopedia of Technical Chemistry, Vol. 19 (1980), pp. 277–295. The gel content of the graft base E.2 is preferably at least 30 wt.%, particularly preferably at least 40 wt.% (measured in toluene).

[0097] The elastomer modifiers or graft polymers to be used as component E) are produced by radical polymerization, preferably by emulsion, suspension, solution or bulk polymerization, in particular by emulsion or bulk polymerization.

[0098] Particularly suitable grafting rubbers are also ABS polymers, which are produced by redox initiation with an initiator system of organic hydroperoxide and ascorbic acid according to US-A 4 937 285.

[0099] Since, as is known, the graft monomers are not necessarily completely grafted onto the graft base during the grafting reaction, according to the invention, graft polymers are also understood to be products that are obtained by (co)polymerization of the graft monomers in the presence of the graft base and are produced during the work-up.

[0100] Suitable acrylic rubbers are also based on graft bases E.2, which preferably consist of polymers of acrylic acid alkyl esters, optionally with up to 40 wt%, based on E.2, other polymerizable, ethylene-unsaturated monomers. Preferred polymerizable acrylic acid esters include C1-C8 alkyl esters, preferably methyl, ethyl, butyl, n-octyl, and 2-ethylhexyl esters; halogenated alkyl esters, preferably halogenated C1-C8 alkyl esters, such as chloroethyl acrylate, glycidyl esters, and mixtures of these monomers. Graft polymers with butyl acrylate as the core and methyl methacrylates as the shell, in particular Paraloid® < EXL2300, Dow Corning Corporation, Midland, Michigan, USA, are especially preferred.

[0101] As an alternative to ethylene-unsaturated monomers, monomers with more than one polymerizable double bond can be copolymerized for crosslinking. Preferred crosslinking monomers are esters of unsaturated monocarboxylic acids with 3 to 8 carbon atoms and unsaturated monohydric alcohols with 3 to 12 carbon atoms, or saturated polyols with 2 to 4 OH groups and 2 to 20 carbon atoms, preferably ethylene glycol dimethacrylate, allyl methacrylate; polyunsaturated heterocyclic compounds, preferably trivinyl and triallyl cyanurate; polyfunctional vinyl compounds, preferably di- and trivinylbenzenes; but also triallyl phosphate and diallyl phthalate.

[0102] Particularly preferred crosslinking monomers are allyl methacrylate, ethylene glycol dimethacrylate, diallyl phthalate and heterocyclic compounds having at least 3 ethylene unsaturated groups.

[0103] Particularly preferred crosslinking monomers are the cyclic monomers triallyl cyanurate, triallyl isocyanurate, triacryloyl hexahydro-s-triazine, and triallylbenzenes. The amount of crosslinked monomers is preferably 0.02 to 5 wt.%, and in particular 0.05 to 2 wt.%, based on the graft base E.2.

[0104] For cyclic crosslinking monomers with at least 3 ethylene unsaturated groups, it is advantageous to limit the amount to less than 1 wt% of the graft base E.2.

[0105] Preferred "other" polymerizable, ethylene-unsaturated monomers, which, in addition to the acrylic acid esters, may optionally serve to prepare the graft base E.2, are acrylonitrile, styrene, α-methylstyrene, acrylamides, vinyl C1-C6 alkyl ethers, methyl methacrylate, glycidyl methacrylate, and butadiene. Preferred acrylate rubbers as graft base E.2 are emulsion polymers having a gel content of at least 60 wt%.

[0106] Other preferably suitable grafting bases according to E.2 are silicone rubbers with grafting-active sites, as described in DE-A 3 704 657 , DE-A 3 704 655 , DE-A 3 631 540 and DE-A 3 631 539 are described.

[0107] Preferred graft polymers containing a silicone component are those comprising methyl methacrylate or styrene-acrylonitrile as a shell and a silicone / acrylate graft as a core. The styrene-acrylonitrile preferably used as a shell is Metablen® < SRK200. The methyl methacrylate preferably used as a shell is Metablen® < S2001, Metablen® < S2030, or Metablen® < SX-005. Metablen® < S2001 is particularly preferred. The products sold under the trade name Metablen® < are available from Mitsubishi Rayon Co., Ltd., Tokyo, Japan.

[0108] For crosslinking, monomers with more than one polymerizable double bond can be copolymerized. Preferred examples of crosslinking monomers are esters of unsaturated monocarboxylic acids with 3 to 8 carbon atoms and unsaturated monohydric alcohols with 3 to 12 carbon atoms, or saturated polyols with 2 to 4 OH groups and 2 to 20 carbon atoms, preferably ethylene glycol dimethacrylate, allyl methacrylate; polyunsaturated heterocyclic compounds, preferably trivinyl and triallyl cyanurate; polyfunctional vinyl compounds, preferably di- and trivinylbenzenes; but also triallyl phosphate and diallyl phthalate.

[0109] Preferred crosslinking monomers are allyl methacrylate, ethylene glycol dimethacrylate, diallyl phthalate and heterocyclic compounds having at least 3 ethylene unsaturated groups.

[0110] Particularly preferred crosslinking monomers are the cyclic monomers triallyl cyanurate, triallyl isocyanurate, triacryloyl hexahydro-s-triazine, and triallylbenzenes. The amount of crosslinked monomers is preferably 0.02 to 5 wt.%, and in particular 0.05 to 2 wt.%, based on the graft base E.2.

[0111] For cyclic crosslinking monomers with at least 3 ethylene unsaturated groups, it is advantageous to limit the amount to less than 1 wt% of the graft base E.2.

[0112] Preferred "other" polymerizable, ethylene-unsaturated monomers, which, in addition to the acrylic acid esters, may optionally serve to prepare the graft base E.2, are acrylonitrile, styrene, α-methylstyrene, acrylamides, vinyl C1-C6 alkyl ethers, methyl methacrylate, glycidyl methacrylate, and butadiene. Preferred acrylate rubbers as graft base E.2 are emulsion polymers having a gel content of at least 60 wt%.

[0113] In addition to elastomer modifiers based on graft polymers, non-graft polymer-based elastomer modifiers can also be used, which have glass transition temperatures < 10°C, preferably < 0°C, and particularly preferably < -20°C. These preferably include elastomers with a block copolymer structure as well as thermoplastic meltable elastomers, in particular EPM, EPDM and / or SEBS rubbers (EPM = ethylene-propylene copolymer, EPDM = ethylene-propylene-diene rubber and SEBS = styrene-ethene-butene-styrene copolymer).

[0114] to be used as component E) Lubricants and demolding agents are preferably those from the series of long-chain fatty acids, salts of long-chain fatty acids, ester derivatives of long-chain fatty acids and montan waxes.

[0115] Preferred long-chain fatty acids are stearic acid or behenic acid. Preferred salts of the long-chain fatty acids are calcium, magnesium, aluminum, or zinc stearate. Preferred ester derivatives of long-chain fatty acids are those based on pentaerythritol, in particular C16-C18 fatty acid esters of pentaerythritol [CAS No. 68604-44-4] or [CAS No. 85116-93-4].

[0116] Montan waxes within the meaning of the present invention are mixtures of straight-chain, saturated carboxylic acids with chain lengths of 28 to 32 carbon atoms. According to the invention, lubricating and / or demolding agents from the group consisting of esters of saturated or unsaturated aliphatic carboxylic acids with 8 to 40 carbon atoms, aliphatic saturated alcohols with 2 to 40 carbon atoms, and metal salts of saturated or unsaturated aliphatic carboxylic acids with 8 to 40 carbon atoms are particularly preferred, wherein pentaerythritol tetrastearate, calcium stearate [CAS No. 1592-23-0], and / or ethylene glycol dimontanate, in particular Licowax® [CAS No. 74388-22-0] from Clariant, Muttenz, Basel, are especially preferred. 115-83-3] e.g. available as Loxiol ®< P861 from Emery Oleochemicals GmbH, Düsseldorf, Germany, is particularly preferred.

[0117] As component E), further components preferably to be used Flame retardantsComponents B) and C) contain various mineral flame retardants, nitrogen-containing flame retardants or phosphorus-containing flame retardants.

[0118] In an alternative embodiment, flame retardants that negatively affect the laser transmission of a product based on polymer compositions according to the invention can also be used, provided that the need requires it, taking into account the disadvantages due to the loss of laser transparency.

[0119] Among mineral flame retardants, magnesium hydroxide is particularly preferred.

[0120] In an alternative embodiment, nitrogen-containing flame retardants and flame retardant synergists can also be used as flame retardants for component E), if required. Preferred nitrogen-containing flame retardants for use as component E) are the reaction products of trichlorotriazine, piperazine, and morpholine according to CAS No. 1078142-02-5, in particular MCA PPM Triazine HF from MCA Technologies GmbH, Biel-Benken, Switzerland, as well as melamine cyanurate or condensation products of melamine, in particular melem, melam, melon, or higher-condensed compounds of this type. Preferred inorganic nitrogen-containing compounds are ammonium salts.

[0121] Furthermore, salts of aliphatic and aromatic sulfonic acids and mineral flame retardant additives, in particular aluminum hydroxide or Ca-Mg carbonate hydrates, may also be used. ( DE-A 4 236 122 )flame retardants to be used for component E).

[0122] Suitable flame retardant agents for component E) include flame retardant synergists from the group of oxygen-, nitrogen-, or sulfur-containing metal compounds. Zinc-free compounds are preferred, in particular molybdenum oxide, magnesium oxide, magnesium carbonate, calcium carbonate, calcium oxide, titanium nitride, magnesium nitride, calcium phosphate, calcium borate, magnesium borate, or mixtures thereof, with calcium carbonate being especially preferred. The calcium carbonate preferably used has a mean particle size (d50) in the range of 0.5 µm to 10 µm, to be determined by laser diffractometry according to ISO 13320, with a d50 in the range of 0.7 µm to 5 µm being preferred and a d50 in the range of 1.0 µm to 3 µm being particularly preferred. A suitable measuring instrument for determining the d50 of calcium carbonate is, for example, the Mastersizer® < 2000 from Malvern Panalytical GmbH, Kassel, Germany.

[0123] In an alternative embodiment, zinc-containing compounds can also be used as flame retardants for component E), if required. These preferably include zinc oxide, zinc borate, zinc stannate, zinc hydroxystannate, zinc sulfide, and zinc nitride, or mixtures thereof.

[0124] In an alternative embodiment, calcium stannate or calcium hydroxystannate can also be used as flame retardants for component E) if required.

[0125] Flame retardants used as component E), different from components B) and C), are preferably, but also inorganic aluminum salts of phosphonic acid. According to Wikipedia, phosphonic acid is the substance with the molecular formula H₃PO₃ [CAS No. 13598-36-2] ( http: / / de.wikipedia.org / wiki / Phosphons%C3%A4ureThe salts of phosphonic acid are called phosphonates. Phosphonic acid can exist in two tautomeric forms, one of which has a lone pair of electrons on the phosphorus atom and the other of which has a doubly bonded oxygen atom to the phosphorus (P=O). The tautomeric equilibrium lies entirely on the side of the form with the doubly bonded oxygen atom. According to A.F. Holleman, E. Wiberg: Textbook of Inorganic Chemistry. 101st edition. Walter de Gruyter, Berlin / New York 1995, ISBN 3-11-012641-9, p. 764, the terms "phosphorous acid" and "phosphites" should only be used for the tautomeric species with a lone pair of electrons on the phosphorus atom. Previously, the terms "phosphorous acid" and "phosphites" were also used for the tautomeric forms with oxygen doubly bonded to phosphorus, so that in the present invention the terms phosphonic acid and phosphorous acid or phosphonates and phosphites are used synonymously.

[0126] Preferably, at least one of the aluminum salts of phosphonic acid from the group is used. primary aluminum phosphonate [Al(H₂PO₃)₃], basic aluminum phosphonate [Al(OH)H₂PO₃)₂·2H₂O], Al₂(HPO₃)₃•xAl₂O₃•nH₂O with x in the range of 2.27 to 1 and n in the range of 0 to 4, Al₂(HPO₃)₃•(H₂O)q of formula (V) where q represents 0, 1, 2, 3 or 4, in particular aluminum phosphonate tetrahydrate [Al₂(HPO₃)₃•4H₂O] or secondary aluminum phosphonate [Al₂(HPO₃)₃], Al₂Mz(HPO₃)y(OH)v•(H₂O)w of formula (VI) where M represents alkali metal ion(s) and z in the range of 0.01 to 1.5, y in the range of 2.63 - 3.5, v in the range of 0 to 2 and w in the range of 0 to 4, and Al 2 (HPO 3 ) u (H 2 PO 3 ) t • (H 2 O) s of formula (VII) wherein u is in the range of 2 to 2.99, t in the range of 2 to 0.01 and s in the range of 0 to 4, wherein in formula (VI) z, y and v and in formula (VII) u and t only take such numbers that the corresponding aluminium salt of phosphonic acid as a whole is uncharged, selected.

[0127] Preferred alkali metals in formula (VI) are sodium and potassium.

[0128] Particularly preferred aluminum salts of phosphonic acid are selected from the group primary aluminum phosphonate [Al(H2PO3)3], secondary aluminum phosphonate [Al2(HPO3)3], basic aluminum phosphonate [Al(OH)H2PO3)2·2H2O], aluminum phosphonate tetrahydrate [Al2(HPO3)3·4H2O] and Al2(HPO3)3·xAl2O3·nH2O with x in the range of 2.27 to 1 and n in the range of 0 to 4.

[0129] Particularly preferred are secondary aluminum phosphonate [Al 2 (HPO 3 ) 3 ], CAS No. 71449-76-8] and secondary aluminum phosphonate tetrahydrate [Al 2 (HPO 3 ) 3 ·4H 2 O], CAS No. 156024-71-4], especially preferred is secondary aluminum phosphonate [Al 2 (HPO 3 ) 3 ].

[0130] Preferred further phosphorus-containing flame retardants, other than components B) and C), are further organic metal phosphinates, red phosphorus, inorganic metal hypophosphites, further metal phosphonates, derivatives of 9,10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxides (DOPO derivatives), resorcinol bis-(diphenyl phosphate) (RDP) including oligomers, bisphenol A bis-diphenyl phosphate (BDP) including oligomers, melamine pyrophosphate, melamine polyphosphate, melamine poly(aluminum phosphate), melamine poly(zinc phosphate) or phenoxyphosphazene oligomers and mixtures thereof.

[0131] Other flame retardants to be used as component E) are carbon formers, particularly preferably phenol-formaldehyde resins, polycarbonates, polyimides, polysulfones, polyethersulfones or polyetherketones, as well as anti-drip agents, in particular tetrafluoroethylene polymers.

[0132] The flame retardants to be used as component E) can be added in pure form, as well as via masterbatches or compacts.

[0133] In an alternative embodiment, halogenated flame retardants can also be used as flame retardants – if the need requires it, taking into account the disadvantages, including the loss of halogen-free flame retardants.Preferred halogen-containing flame retardants are commercially available organic halogen compounds, particularly preferably ethylene-1,2-bistetrabromophthalimide, decabromodiphenylethane, tetrabromobisphenol-A epoxy oligomer, tetrabromobisphenol-A oligocarbonate, tetrachlorobisphenol-A oligocarbonate, polypentabrombenzyl acrylate, brominated polystyrene or brominated polyphenylene ethers, which can be used alone or in combination with synergists, in particular - if the specific application requires it with regard to disadvantages in laser transmission - antimony trioxide or antimony pentoxide, wherein among the halogen-containing flame retardants tetrabromobisphenol-A epoxy oligomer and tetrabromobisphenol-A oligocarbonate are particularly preferred.

[0134] In an alternative embodiment, if required, and possibly taking into account the disadvantages of laser transmission, other fillers and reinforcing materials different from component D) can also be used.

[0135] Preferably, this is at least one filler and / or reinforcing material from the group consisting of carbon fibers [CAS No. 7440-44-0], calcium silicate [CAS No. 1344-95-2], calcium metasilicate [CAS No. 10101-39-0], magnesium carbonate [CAS No. 546-93-0], kaolin [CAS No. 1332-58-7], calcined kaolin [CAS No. 92704-41-1], chalk [CAS No. 1317-65-3], kyanite [CAS No. 1302-76-7], powdered or ground quartz [CAS No. 14808-60-7], mica [CAS No. 1318-94-1], phlogopite [CAS No. 12251-00-2], Feldspar [CAS No. 68476-25-5], Wollastonite [CAS No. 13983-17-0], Montmorillonite [CAS No. 67479-91-8], Pseudoboehmite of the formula AlO(OH), Magnesium Carbonate [CAS No. 12125-28-9] and Talc [CAS No. 14807-96-6] and - if required - also Barium Sulfate [CAS No. 7727-43-7].

[0136] Among the fibrous fillers or reinforcing materials other than component D), wollastonite is particularly preferred. In the case of a laser-absorbing component or product, carbon fibers can also be used as a reinforcing material.

[0137] In the case of a laser-absorbing component, at least one component can be used as component E), albeit with the loss of the property of high laser transmission. Laser absorber Selected from the group consisting of antimony trioxide, tin oxide, tin orthophosphate, barium titanate, aluminum oxide, copper hydroxyphosphate, copper orthophosphate, potassium copper diphosphate, copper hydroxide, antimony tin oxide, bismuth trioxide, and anthraquinone are used. Tin oxide, antimony trioxide, or antimony tin oxide are particularly preferred. Antimony trioxide is most preferred.

[0138] The laser absorber, in particular the antimony trioxide, can be used directly as a powder or in the form of masterbatches. Preferred masterbatches are those based on polyamide and / or polyolefins, preferably polyethylene. Antimony trioxide is most preferably used in the form of a polyamide 6-based masterbatch.

[0139] The laser absorber can be used individually or as a mixture of several laser absorbers.

[0140] Laser absorbers can absorb laser light of a specific wavelength. In practice, this wavelength ranges from 157 nm to 10.6 µm. Examples of lasers with these wavelengths are described in WO2009 / 003976 A1. Nd:YAG lasers, which can achieve wavelengths of 1064, 532, 355, and 266 nm, and CO₂ lasers are preferred. Other preferred uses

[0141] The present invention preferably relates to the useof B) aluminium salts of general formula (I) wherein R stands for C1-C12 alkyl, preferably for methyl, ethyl, isopropyl or iso-butyl, tert-butyl or n-butyl, particularly preferably for ethyl or methyl, most preferably for methyl, to Achieving a CTI A of 600 according to IEC 60112-2010 in or for polyester-based products, wherein 1 to 80 mass fractions, preferably 2 to 60 mass fractions, particularly preferably 3 to 30 mass fractions, particularly preferably 5 to 20 mass fractions of aluminium salt of formula (I) per 100 mass fractions as component A) polyalkylene terephthalate or polycycloalkylene terephthalate, in particular polybutylene terephthalate, polyethylene terephthalate or poly-1,4-cyclohexanedimethanol terephthalate.

[0142] The present invention particularly preferably relates to the use of B) Aluminium methylphosphonate of formula (1a) for the Achieving a CTI A of 600 according to IEC 60112-2010 in or for polyester-based products,wherein 1 to 80 mass fractions, preferably 2 to 60 mass fractions, particularly preferably 3 to 30 mass fractions, particularly preferably 5 to 20 mass fractions of aluminium salt of formula (1a) per 100 mass fractions as component A) polyalkylene terephthalate or polycycloalkylene terephthalate, in particular polybutylene terephthalate, polyethylene terephthalate or poly-1,4-cyclohexanedimethanol terephthalate.

[0143] The present invention preferably relates to the use of B) aluminium salts of general formula (I) wherein R stands for C1-C12 alkyl, preferably for methyl, ethyl, isopropyl or iso-butyl, tert-butyl or n-butyl, particularly preferably for ethyl or methyl, most preferably for methyl, to Achieving a CTI A of 600 according to IEC 60112-2010 in polyester-based products, wherein 1 to 80 mass fractions, preferably 2 to 60 mass fractions, particularly preferably 3 to 30 mass fractions, particularly preferably 5 to 20 mass fractions of aluminium salt of formula (I) 100 mass fractions as component A) polyalkylene terephthalate or polycycloalkylene terephthalate, in particular polybutylene terephthalate, polyethylene terephthalate or poly-1,4-cyclohexanedimethanol terephthalate, and 5 to 120 mass fractions, preferably 7 to 80 mass fractions, particularly preferably 8 to 60 mass fractions, particularly preferably 10 to 50 mass fractions of at least one organic phosphinic acid salt of formula (II) to be used as component C) and / or at least one diphosphinic acid salt of formula (III) and / or their polymers, wherein R1< , R2< are the same or different and represent a linear or branched C1-C6 alkyl, and / or C6-C14 aryl, R3< represents a linear or branched C1-C10 alkylene, C6-C10 arylene or C1-C6-alkyl-C6-C10-arylene or C6-C10-arylene-C1-C6-alkylene, M represents aluminum, zinc or titanium, m represents an integer from 1 to 4, n represents an integer from 1 to 3, x represents 1 and 2, wherein n, x and m in formula (III) can only simultaneously assume such integers that the diphosphinic acid salt of formula (III) as a whole is uncharged, are substituted and combined with the The requirement is that component B) is used in smaller mass proportions than component C). .

[0144] The present invention particularly preferably relates to the use of B) aluminium methylphosphonate of formula (1a) for the Achieving a CTI A of 600 according to IEC 60112-2010 in or for polyester-based products,wherein 1 to 800 mass fractions, preferably 2 to 60 mass fractions, particularly preferably 3 to 30 mass fractions, particularly preferably 5 to 20 mass fractions of aluminium salt of formula (1a) on 100 mass fractions as component A) polyalkylene terephthalate or polycycloalkylene terephthalate, in particular polybutylene terephthalate, polyethylene terephthalate or poly-1,4-cyclohexanedimethanol terephthalate, and 5 to 120 mass fractions, preferably 7 to 80 mass fractions, particularly preferably 8 to 60 mass fractions, particularly preferably 10 to 50 mass fractions of at least one organic phosphinic acid salt of formula (II) to be used as component C) and / or at least one diphosphinic acid salt of formula (III) and / or their polymers, wherein R1< , R2< are the same or different and represent a linear or branched C1-C6 alkyl, and / or C6-C14 aryl, R3< represents a linear or branched C1-C10 alkylene, C6-C10 arylene or C1-C6-alkyl-C6-C10-arylene or C6-C10-arylene-C1-C6-alkylene, M represents aluminum, zinc or titanium, m represents an integer from 1 to 4, n represents an integer from 1 to 3, x represents 1 and 2, wherein n, x and m in formula (III) can only simultaneously assume such integers that the diphosphinic acid salt of formula (III) as a whole is uncharged, are substituted and combined with the The requirement is that component B) is used in smaller mass proportions than component C).

[0145] The present invention particularly preferably relates to the use of B) Aluminium methylphosphonate of formula (1a) for the Achieving a CTI A of 600 according to IEC 60112-2010 in or for polyester-based products,wherein 1 to 80 mass fractions, preferably 2 to 60 mass fractions, particularly preferably 3 to 30 mass fractions, particularly preferably 5 to 20 mass fractions of aluminium salt of formula (1a) 100 mass fractions as component A) polyalkylene terephthalate or polycycloalkylene terephthalate, in particular polybutylene terephthalate, polyethylene terephthalate or poly-1,4-cyclohexanedimethanol terephthalate, and 5 to 120 mass fractions, preferably 7 to 80 mass parts, particularly preferably 8 to 60 mass parts, particularly preferably 10 to 50 mass parts of aluminium tris(diethylphosphinate) are used and combined with the The requirement is that component B) is used in smaller mass proportions than component C).

[0146] The present invention preferably relates to the use of B) aluminium salts of the general formula (I) wherein R stands for C1-C12 alkyl, preferably for methyl, ethyl, isopropyl or iso-butyl, tert-butyl or n-butyl, particularly preferably for ethyl or methyl, most preferably for methyl, to Achieving a CTI A of 600 according to IEC 60112-2010 in or for polyester-based products, wherein 1 to 80 mass fractions, preferably 2 to 60 mass fractions, particularly preferably 3 to 30 mass fractions, particularly preferably 5 to 20 mass fractions of aluminium salt of formula (I) 100 mass fractions as component A) polyalkylene terephthalate or polycycloalkylene terephthalate, in particular polybutylene terephthalate, polyethylene terephthalate or poly-1,4-cyclohexanedimethanol terephthalate, and 5 to 120 mass fractions, preferably 7 to 80 mass fractions, particularly preferably 8 to 60 mass fractions, particularly preferably 10 to 50 mass fractions of at least one organic phosphinic acid salt of formula (II) to be used as component C) and / or at least one diphosphinic acid salt of formula (III) and / or their polymers, wherein R1< , R2< are the same or different and represent a linear or branched C1-C6 alkyl, and / or C6-C14 aryl, R3< represents a linear or branched C1-C10 alkylene, C6-C10 arylene or C1-C6-alkyl-C6-C10-arylene or C6-C10-arylene-C1-C6 alkylene, M represents aluminium, zinc or titanium, m represents an integer from 1 to 4, n represents an integer from 1 to 3, x represents 1 and 2, wherein n, x and m in formula (III) can only simultaneously assume such integers that the diphosphinic acid salt of formula (III) as a whole is uncharged, and 3 to 300 mass fractions, preferably 5 to 200 mass fractions, particularly preferably 10 to 120 mass fractions, particularly preferably 15 to 90 mass fractions of at least one component D) to be used glass-based filler and / or reinforcing material to be used with the The requirement is that component B) is used in smaller mass proportions than component C).

[0147] The present invention particularly preferably relates to the useof B) Aluminium methylphosphonate of formula (1a) for the Achieving a CTI A of 600 according to IEC 60112-2010 in or for polyester-based products, wherein 1 to 80 mass fractions, preferably 2 to 60 mass fractions, particularly preferably 3 to 30 mass fractions, particularly preferably 5 to 20 mass fractions of aluminium salt of formula (1a) 100 mass fractions as component A) polyalkylene terephthalate or polycycloalkylene terephthalate, in particular polybutylene terephthalate, polyethylene terephthalate or poly-1,4-cyclohexanedimethanol terephthalate, 5 to 120 mass fractions, preferably 7 to 80 mass fractions, particularly preferably 8 to 60 mass fractions, particularly preferably 10 to 50 mass fractions of at least one organic phosphinic acid salt of formula (II) to be used as component C) and / or at least one diphosphinic acid salt of formula (III) and / or their polymers, wherein R1< , R2< are the same or different and represent a linear or branched C1-C6 alkyl, and / or C6-C14 aryl, R3< represents a linear or branched C1-C10 alkylene, C6-C10 arylene or C1-C6 alkyl-C6-C10 arylene or C6-C10 aryl-C1-C6 alkylene, M represents aluminium, zinc or titanium, m represents an integer from 1 to 4, n represents an integer from 1 to 3, x represents 1 and 2, wherein n, x and m in formula (III) can only simultaneously assume such integers that the diphosphinic acid salt of formula (III) as a whole is uncharged, and 3 to 300 mass fractions, preferably 5 to 200 mass fractions, particularly preferably 10 to 120 mass fractions, particularly preferably 15 to 90 mass fractions of at least one component D) to be used glass-based filler and / or reinforcing material to be used with the The requirement is that component B) is used in smaller mass proportions than component C).

[0148] The present invention particularly preferably relates to the useof B) Aluminium methylphosphonate of formula (1a) for the Achieving a CTI A of 600 according to IEC 60112 in or for polyester-based products, wherein 1 to 80 mass fractions, preferably 2 to 60 mass fractions, particularly preferably 3 to 30 mass fractions, particularly preferably 5 to 20 mass fractions of aluminium salt of formula (1a) 100 mass fractions as component A) polyalkylene terephthalate or polycycloalkylene terephthalate, in particular polybutylene terephthalate, polyethylene terephthalate or poly-1,4-cyclohexanedimethanol terephthalate, 5 to 120 mass fractions, preferably 7 to 80 mass fractions, particularly preferably 8 to 60 mass fractions, particularly preferably 10 to 50 mass fractions of at least one organic phosphinic acid salt of formula (II) to be used as component C) and / or at least one diphosphinic acid salt of formula (III) and / or their polymers, wherein R1< , R2< are the same or different and represent a linear or branched C1-C6 alkyl, and / or C6-C14 aryl, R3< represents a linear or branched C1-C10 alkylene, C6-C10 arylene or C1-C6 alkyl-C6-C10 arylene or C6-C10 aryl-C1-C6 alkylene, M represents aluminium, zinc or titanium, m represents an integer from 1 to 4, n represents an integer from 1 to 3, x represents 1 and 2, wherein n, x and m in formula (III) can only simultaneously assume such integers that the diphosphinic acid salt of formula (III) as a whole is uncharged, and 3 to 300 mass fractions, preferably 5 to 200 mass fractions, particularly preferably 10 to 120 mass fractions, particularly preferably 15 to 90 mass fractions as component D) to be used fiber optics to be used with the The requirement is that component B) is used in smaller mass proportions than component C).

[0149] The present invention particularly preferably relates to the use of B) Aluminium methylphosphonate of formula (1a) for the Achieving a CTI A of 600 according to IEC 60112-2010 in or for polyester-based products, wherein 1 to 80 mass fractions, preferably 2 to 60 mass fractions, particularly preferably 3 to 30 mass fractions, particularly preferably 5 to 20 mass fractions of aluminium salt of formula (1a) 100 mass fractions as component A) polyalkylene terephthalate or polycycloalkylene terephthalate, in particular polybutylene terephthalate, polyethylene terephthalate or poly-1,4-cyclohexanedimethanol terephthalate, 5 to 120 mass fractions, preferably 7 to 80 mass fractions, particularly preferably 8 to 60 mass fractions, particularly preferably 10 to 50 mass fractions of aluminium tris(diethylphosphinate) as component C) and 3 to 300 mass fractions, preferably 5 to 200 mass fractions, particularly preferably 10 to 120 mass fractions, particularly preferably 15 to 90 mass fractions of at least one component D) to be used glass-based filler and / or reinforcing material to be used with the The requirement is that component B) is used in smaller mass proportions than component C).

[0150] The present invention particularly preferably relates to the use of B) aluminium methylphosphonate of formula (1a) for the Achieving a CTI A of 600 according to IEC 60112-2010 in or for polyester-based products, wherein 1 to 80 mass fractions, preferably 2 to 60 mass fractions, particularly preferably 3 to 30 mass fractions, particularly preferably 5 to 20 mass fractions of aluminium salt of formula (1a) 100 mass fractions as component A) polyalkylene terephthalate or polycycloalkylene terephthalate, in particular polybutylene terephthalate, polyethylene terephthalate or poly-1,4-cyclohexanedimethanol terephthalate, 5 to 120 mass fractions, preferably 7 to 80 mass fractions, particularly preferably 8 to 60 mass fractions, particularly preferably 10 to 50 mass fractions of aluminium tris(diethylphosphinate) as component C) and 3 to 300 mass fractions, preferably 5 to 200 mass fractions, particularly preferably 10 to 120 mass fractions, particularly preferably 15 to 90 mass fractions as component D) to be used fiber opticsto be used with the The requirement is that component B) is used in smaller mass proportions than component C).

[0151] The present invention preferably relates to the use of B) aluminium salts of general formula (I) wherein R stands for C1-C12 alkyl, preferably for methyl, ethyl, isopropyl or iso-butyl, tert-butyl or n-butyl, particularly preferably for ethyl or methyl, most preferably for methyl, to Achieving a CTI A of 600 according to IEC 60112-2010 and a laser transmission of at least 8% as determined according to DVS guideline 2243 (0112014) for wall thicknesses of 1.5 mm in or for polyester-based products, wherein 1 to 80 mass fractions, preferably 2 to 60 mass fractions, particularly preferably 3 to 30 mass fractions, particularly preferably 5 to 20 mass fractions of aluminium salt of formula (I) per 100 mass fractions as component A) polyalkylene terephthalate or polycycloalkylene terephthalate, in particular polybutylene terephthalate, polyethylene terephthalate or poly-1,4-cyclohexane dimethanol terephthalate.

[0152] The present invention particularly preferably relates to the use of B) aluminium methylphosphonate of formula (1a) for the Achieving a CTI A of 600 according to IEC 60112-2010 and a laser transmission of at least 8% as determined according to DVS guideline 2243 (01 / 2014) for wall thicknesses of 1.5 mm in or for polyester-based products, wherein 1 to 80 mass fractions, preferably 2 to 60 mass fractions, particularly preferably 3 to 30 mass fractions, particularly preferably 5 to 20 mass fractions of aluminium salt of formula (1a) per 100 mass fractions as component A) polyalkylene terephthalate or polycycloalkylene terephthalate, in particular polybutylene terephthalate, polyethylene terephthalate or poly-1,4-cyclohexanedimethanol terephthalate.

[0153] The present invention preferably relates to the use of B) aluminium salts of the general formula (I) wherein R stands for C1-C12 alkyl, preferably for methyl, ethyl, isopropyl or iso-butyl, tert-butyl or n-butyl, particularly preferably for ethyl or methyl, most preferably for methyl, to Achieving a CTI A of 600 according to IEC 60112-2010 and a laser transmission of at least 8% as determined according to DVS guideline 2243 (0112014) for wall thicknesses of 1.5 mm in or for polyester-based products, wherein 1 to 80 mass fractions, preferably 2 to 60 mass fractions, particularly preferably 3 to 30 mass fractions, particularly preferably 5 to 20 mass fractions of aluminium salt of formula (I) 100 mass fractions as component A) polyalkylene terephthalate or polycycloalkylene terephthalate, in particular polybutylene terephthalate, polyethylene terephthalate or poly-1,4-cyclohexanedimethanol terephthalate, and 5 to 120 mass fractions, preferably 7 to 80 mass fractions, particularly preferably 8 to 60 mass fractions, particularly preferably 10 to 50 mass fractions of at least one organic phosphinic acid salt of formula (II) to be used as component C) and / or at least one diphosphinic acid salt of formula (III) and / or their polymers, wherein R1< , R2< are the same or different and represent a linear or branched C1-C6 alkyl, and / or C6-C14 aryl, R3< represents a linear or branched C1-C10 alkylene, C6-C10 arylene or C1-C6-alkyl-C6-C10-arylene or C6-C10-arylene-C1-C6-alkylene, M represents aluminum, zinc or titanium, m represents an integer from 1 to 4; n represents an integer from 1 to 3, x represents 1 and 2, wherein n, x and m in formula (III) can only simultaneously assume such integers that the diphosphinic acid salt of formula (III) as a whole is uncharged. with the proviso that component B) is used in smaller mass fractions than component C).

[0154] The present invention particularly preferably relates to the use of B) Aluminium methylphosphonate of formula (1a) for the Achieving a CTI A of 600 according to IEC 60112-2010 and a laser transmission of at least 8% as determined according to DVS guideline 2243 (01 / 2014) for wall thicknesses of 1.5mm in or for polyester-based products, wherein 1 to 80 mass fractions, preferably 2 to 60 mass fractions, particularly preferably 3 to 30 mass fractions, particularly preferably 5 to 20 mass fractions of aluminum salt of formula (1a) on 100 mass fractions as component A) polyalkylene terephthalate or polycycloalkylene terephthalate, in particular polybutylene terephthalate, polyethylene terephthalate or poly-1,4-cyclohexanedimethanol terephthalate, and 5 to 120 mass fractions, preferably 7 to 80 mass fractions, particularly preferably 8 to 60 mass fractions, particularly preferably 10 to 50 mass fractions of at least one organic phosphinic acid salt of formula (II) to be used as component C) and / or at least one diphosphinic acid salt of formula (III) and / or their polymers, wherein R1< , R2< are the same or different and represent a linear or branched C1-C6 alkyl, and / or C6-C14 aryl, R3< represents a linear or branched C1-C10 alkylene, C6-C10 arylene or C1-C6-alkyl-C6-C10-arylene or C6-C10-arylene-C1-C6-alkylene, M represents aluminum, zinc or titanium, m represents an integer from 1 to 4; n represents an integer from 1 to 3, x represents 1 and 2, wherein n, x and m in formula (III) can only simultaneously assume such integers that the diphosphinic acid salt of formula (III) as a whole is uncharged. with the proviso that component B) is used in smaller mass fractions than component C).

[0155] The present invention preferably relates to the use of B) aluminium salts of general formula (I) wherein R stands for C1-C12 alkyl, preferably for methyl, ethyl, isopropyl or iso-butyl, tert-butyl or n-butyl, particularly preferably for ethyl or methyl, most preferably for methyl, to Achieving a CTI A of 600 according to IEC 60112-2010 and a laser transmission of at least 8% as determined according to DVS guideline 2243 (01 / 2014) for wall thicknesses of 1.5 mm in or for polyester-based products, wherein 1 to 80 mass fractions, preferably 2 to 60 mass fractions, particularly preferably 3 to 30 mass fractions, particularly preferably 5 to 20 mass fractions of aluminium salt of formula (I) 100 mass fractions as component A) polyalkylene terephthalate or polycycloalkylene terephthalate, in particular polybutylene terephthalate, polyethylene terephthalate or poly-1,4-cyclohexanedimethanol terephthalate, 5 to 120 mass fractions, preferably 7 to 80 mass fractions, particularly preferably 8 to 60 mass fractions, particularly preferably 10 to 50 mass fractions of at least one organic phosphinic acid salt of formula (II) to be used as component C) and / or at least one diphosphinic acid salt of formula (III) and / or their polymers, wherein R1< , R2< are the same or different and represent a linear or branched C1-C6 alkyl, and / or C6-C14 aryl, R3< represents a linear or branched C1-C10 alkylene, C6-C10 arylene or C1-C6-alkyl-C6-C10-arylene or C6-C10-arylene-C1-C6 alkylene, M represents aluminium, zinc or titanium, m represents an integer from 1 to 4; n represents an integer from 1 to 3, x represents 1 and 2, wherein n, x and m in formula (III) can only simultaneously assume such integers that the diphosphinic acid salt of formula (III) as a whole is uncharged, and 3 to 300 mass fractions, preferably 5 to 200 mass fractions, particularly preferably 10 to 120 mass fractions, particularly preferably 15 to 90 mass fractions of at least one component D) to be used glass-based filler and / or reinforcing material to be used with the The requirement is that component B) is used in smaller mass proportions than component C).

[0156] The present invention particularly preferably relates to the useof B) Aluminium methylphosphonate of formula (1a) for the Achieving a CTI A of 600 according to IEC 60112-2010 and a laser transmission of at least 8% as determined according to DVS guideline 2243 (01 / 2014) for wall thicknesses of 1.5 mm in or for polyester-based products, wherein 1 to 80 mass fractions, preferably 2 to 60 mass fractions, particularly preferably 3 to 30 mass fractions, particularly preferably 5 to 20 mass fractions of aluminium salt of formula (1a) 100 mass fractions as component A) polyalkylene terephthalate or polycycloalkylene terephthalate, in particular polybutylene terephthalate, polyethylene terephthalate or poly-1,4-cyclohexanedimethanol terephthalate, 5 to 120 mass fractions, preferably 7 to 80 mass fractions, particularly preferably 8 to 60 mass fractions, particularly preferably 10 to 50 mass fractions of at least one organic phosphinic acid salt of formula (II) to be used as component C) and / or at least one diphosphinic acid salt of formula (III) and / or their polymers, wherein R1< , R2< are the same or different and represent a linear or branched C1-C6 alkyl, and / or C6-C14 aryl, R3< represents a linear or branched C1-C10 alkylene, C6-C10 arylene or C1-C6-alkyl-C6-C10-arylene or C6-C10-arylene-C1-C6 alkylene, M represents aluminium, zinc or titanium, m represents an integer from 1 to 4; n represents an integer from 1 to 3, x represents 1 and 2, wherein n, x and m in formula (III) can only simultaneously assume such integers that the diphosphinic acid salt of formula (III) as a whole is uncharged, and 3 to 300 mass fractions, preferably 5 to 200 mass fractions, particularly preferably 10 to 120 mass fractions, particularly preferably 15 to 90 mass fractions of at least one component D) to be used glass-based filler and / or reinforcing material to be used with the The requirement is that component B) is used in smaller mass proportions than component C).

[0157] Finally, the invention relates to the use of the compositions according to the invention for the manufacture of products, preferably products for electromobility, for household appliances and in the electronics and electrical sector. Other preferred compositions

[0158] The invention relates to compositions containing A) per 100 mass parts polybutylene terephthalate, polyethylene terephthalate or poly-1,4-cyclohexanedimethanol terephthalate, B) 1 to 80 mass parts, preferably 2 to 60 mass parts, particularly preferably 3 to 30 mass parts, particularly preferably 5 to 20 mass parts aluminium methylphosphonate of formula (1a) C) 5 to 120 mass fractions, preferably 7 to 80 mass fractions, particularly preferably 8 to 60 mass fractions, aluminum tris(diethylphosphinate), and D) 3 to 300 mass fractions, preferably 5 to 200 mass fractions, particularly preferably 10 to 120 mass fractions, particularly preferably 15 to 90 mass fractions of glass fibers provided that component B) is present in smaller mass fractions than component C).

[0159] Particularly preferred are compositions wherein as component A) polybutylene terephthalate and as component B) aluminium methylphosphonate of formula (1a) Aluminum tris(diethylphosphinate) is used as component C) and glass fibers as component D). Other preferred methods

[0160] According to the invention, a preferred Proceedingsfor the manufacture of products, preferably products for electromobility, household appliances and in the electronics and electrical sector, by combining component A) 100 mass parts of polybutylene terephthalate, polyethylene terephthalate or poly-1,4-cyclohexanedimethanol terephthalate with B) 1 to 80 mass parts, preferably 2 to 60 mass parts, particularly preferably 3 to 30 mass parts, particularly preferably 5 to 20 mass parts of aluminium methylphosphonate of formula (1a) C) 5 to 120 mass fractions, preferably 7 to 80 mass fractions, particularly preferably 8 to 60 mass fractions, aluminum tris(diethylphosphinate), and D) 3 to 300 mass fractions, preferably 5 to 200 mass fractions, particularly preferably 10 to 120 mass fractions, particularly preferably 15 to 90 mass fractions of glass fibers and, if necessary, mixed or blended with further additives in at least one mixing unit and finally processed by injection molding, provided that component B) is used in lower mass proportions than component C).

[0161] Particularly preferred are processes in which component A) is polybutylene terephthalate and component B) is aluminium methylphosphonate of formula (1a) Aluminum tris(diethylphosphinate) is used as component C) and glass fibers as component D). Examples

[0162] To demonstrate the improvements in properties described in the invention, corresponding polyalkylene terephthalate or polycycloalkylene terephthalate-based polymer compositions were first prepared by compounding. The individual components according to Table IThe materials were mixed in a twin-screw extruder (ZSK 25 Compounder from Coperion Werner & Pfleiderer (Stuttgart, Germany)) at temperatures between 260 and 290°C, extruded as a strand, cooled until granulatable, and then granulated. After drying, typically for 2 hours at 120°C in a desiccant dryer, the granules were injection-molded at temperatures between 260 and 290°C to produce standard test specimens for the respective tests, using an Arburg 320-210-500 injection molding machine.

[0163] The aluminum methylphosphonate of formula (1a), used as component B) in the examples and comparative examples, was produced according to Example 1 of WO 2021 / 076169 A1 . stray current resistance

[0164] The Trace current resistance(English "Comparative Tracking Index") was determined in accordance with IEC 60112-2010 on test specimens with dimensions of 60mm • 40mm • 4mm at a test voltage of 600V with test solution A.

[0165] In a deviation from the standard procedure, instead of applying 50 drops to 5 test specimens (250 drops total), a more demanding test was conducted using 100 drops to 3 test specimens (300 drops total). The mean number of drops required to cause material failure due to a leakage current of > 0.5 A or ignition followed by a sustained flame of the test specimen was then determined. LASER TRANSPARENCY

[0166] The Laser transparency The samples examined within the scope of the present invention were examined in accordance with the DVS Guideline 2243 (0112014) "Laser beam welding of thermoplastic materials"Measurements were taken using test specimens with dimensions 125 mm × 13 mm × 1.5 mm in the near-infrared (NIR) range using the LPKF TMG3 transmission meter from LPKF Laser & Electronics AG, Garbsen, Germany, which had previously been calibrated with a measurement standard produced according to DIN EN ISO / IEC 17025, at a laser wavelength of 980 nm; see: LPKF AG 101016-DE: "Simple transmission measurement for plastics LPKF TMG3". Flame retardant

[0167] The Flame retardancy The test specimen, measuring 125 mm • 13 mm • 0.75 mm, was tested according to the UL94V method. ( Underwriters Laboratories Inc. Standard of Safety, "Test for Flammability of Plastic Materials for Parts in Devices and Appliances", pp. 14 - 18 Northbrook 1998 ) certainly. IZOD IMPACT FORCE

[0168] The Impact resistance According to IZOD, one received ISO180-A on test specimens with dimensions of 80 mm • 10 mm • 4 mm.

[0169] The Flexural strength and the Edge fiber elongation was obtained from bending tests according to ISO178on test specimens with dimensions of 80 mm • 10 mm • 4 mm. Starting materials:

[0170] Component A / 1): Linear polybutylene terephthalate (mixture of Pocan® B 1300, with an intrinsic viscosity of 93 cm³ / g (each measured in phenol : 1,2-dichlorobenzene = 1:1 at 25°C) in a ratio of 3:2. Both Pocan® types are commercial products of Lanxess Deutschland GmbH, Cologne, Germany. Component B / 1): Aluminium methylphosphonate of formula (1a) produced according to WO 2021 / 076169 A1 , Example 1 Component C / 1): Aluminium tris(diethylphosphinate), [CAS No. 225789-38-8] (Exolit ®< OP1240 of Clariant SE, Muttenz, Switzerland) Component D / 1): Cut glass fiber CS 7967D from Lanxess Deutschland GmbH, Cologne, Germany [average fiber diameter 10 µm, average fiber length 4.5 mm, E-glass (DIN 1259), coated with silane] Component E): The following components, commonly used in flame-retardant thermoplastic polyesters, were used as further additives to component E) in the examples: Anti-dripping additive: Polytetrafluoroethylene, [CAS No. 9002-84-0] (Dyneon ®< PA 5932 of Dyneon GmbH & Co KG, Neuss, Germany) Thermostabilizer: Tetrakis(2,4-di-tert-butylphenyl)-1,1-biphenyl-4,4'-diylbisphosphonite [CAS No. 38613-77-3] (Hostanox® < P-EPQ from Clariant International Ltd., Muttenz, Switzerland) Mold release agent: Pentaerythritol tetrastearate (PETS) [CAS No. 115-83-3] (Loxiol ®< VPG 861, Cognis Deutschland GmbH, Düsseldorf, Germany) The other additives used (component E) are identical in type and quantity for the corresponding comparison examples and examples, with a total mass fraction of 1.0. Component X / 1): Melamine cyanurate, (Melapur® < MC25, from BASF SE, Ludwigshafen, Germany) Table I Example 1 See 1 See 2 Component A / 1 mass fraction 100 100 100 Component B / 1 mass fraction 9,5 0,0 0,0 Component C / 1 mass fraction 27,6 27,6 37,1 Component D / 1 mass fraction 34,5 34,5 34,5 Component E mass fraction 1,0 1,0 1,0 Component X / 1 mass fraction 0,0 9,5 0,0 UL94 (0.75mm) [Class] V0 V0 - CTI A at 600V [Number of drops, average] 100 >50, < 100 <50 IZOD [kJ / m²<] 35 < 30 - Flexural strength [MPa] 149 143 - Edge fiber elongation [%] 2,8 < 2,5 - LPKF laser transmission [%] 9,7 <8 -

[0171] Component details in Table I in mass fractions based on 100 mass fractions of component A1

[0172] Table I shows that only the inventive example 1 shows both a UL94 classification V0 at 0.75mm, and in comparison to the standard under significantly more demanding conditions with 100 drops each on 3 test specimens (a total of 300 drops) a CTI A at 600V and also has a laser transmission significantly above 8% on a 1.5mm thick test specimen.

[0173] Compared with a formulation containing a nitrogen-based flame retardant (cf. 1), example 1 also shows better mechanical performance, as exemplified by higher values ​​for impact strength according to IZOD and better edge fiber elongation.

Claims

1. Compositions comprising A) per 100 parts by mass of polyalkylene terephthalate or polycycloalkylene terephthalate, B) 1 to 80 parts by mass, preferably 2 to 60 parts by mass, particularly preferably 3 to 30 parts by mass, especially preferably 5 to 20 parts by mass, of at least one aluminium salt of general formula (I) wherein R represents C1-C12-alkyl, preferably methyl, ethyl, isopropyl or isobutyl, tert-butyl or n-butyl, particularly preferably ethyl or methyl, very particularly preferably methyl, C) 5 to 120 parts by mass, preferably 7 to 80 parts by mass, particularly preferably 8 to 60 parts by mass, especially preferably 10 to 50 parts by mass, of at least one organic phosphinic acid salt of formula (II) and / or at least one diphosphinic acid salt of formula (III) and / or of polymers thereof, Wherein R1, R2 are identical or different and represent a linear or branched C1-C6-alkyl and / or Co-C14-aryl, R3 represents linear or branched C1-C10-alkylene, C6-C10-arylene or C1-C6-alkyl-C6-C10-arylene or C6-C10-aryl-C1-C6-alkylene, M represents aluminium, zinc or titanium, m represents an integer from 1 to 4; n represents an integer from 1 to 3, x represents 1 and 2, wherein n, x and m in formula (III) can simultaneously assume only integers such that the diphosphinic acid salt of formula (III) as a whole is uncharged, and D) 3 to 300 parts by mass, preferably 5 to 200 parts by mass, particularly preferably 10 to 120 parts by mass, especially preferably 15 to 90 parts by mass, of at least one glass-based filler and / or reinforcer with the proviso that component B) is present in lower mass fractions than component C).

2. Compositions according to Claim 1, characterized in that they employ polybutylene terephthalate, polyethylene terephthalate or poly-1,4-cyclohexanedimethanol terephthalate as component A).

3. Compositions according to Claim 1 or 2, characterized in that they employ aluminium tris(diethylphosphinate) as component C).

4. Compositions according to one or more of Claims 1 to 3, characterized in that they employ glass fibres as component D).

5. Compositions according to one or more of Claims 1 to 4, characterized in that they employ polybutylene terephthalate as component A), aluminium methylphosphonate of formula (la) as component B), aluminium tris(diethylphosphinate) as component C) and glass fibres as component D).

6. Products, preferably products for electromobility, for household appliances and in the electronics and electricals sector, based on the compositions according to one or more of Claims 1 to 5.

7. Process for producing products, preferably products for electromobility, for household appliances and in the electronics and electricals sector, comprising mixing or blending component A) 100 parts by mass of polyalkylene terephthalate or polycycloalkene terephthalate with B) 1 to 80 parts by mass, preferably 2 to 60 parts by mass, particularly preferably 3 to 30 parts by mass, especially preferably 5 to 20 parts by mass, of at least one aluminium salt of general formula (I) wherein R represents C1-C12-alkyl, preferably methyl, ethyl, isopropyl or isobutyl, tert-butyl or n-butyl, particularly preferably ethyl or methyl, very particularly preferably methyl, C) 5 to 120 parts by mass, preferably 7 to 80 parts by mass, particularly preferably 8 to 60 parts by mass, especially preferably 10 to 50 parts by mass, of at least one organic phosphinic acid salt of formula (II) and / or at least one diphosphinic acid salt of formula (III) and / or of polymers thereof, wherein R1, R2 are identical or different and represent a linear or branched C1-C6-alkyl and / or C6-C14-aryl, R3 represents linear or branched C1-C10-alkylene, C6-C10-arylene or C1-C6-alkyl-C6-C10-arylene or C6-C10-aryl-C1-C6-alkylene, M represents aluminium, zinc or titanium, m represents an integer from 1 to 4; n represents an integer from 1 to 3, x represents 1 and 2, wherein n, x and m in formula (III) can simultaneously assume only integers such that the diphosphinic acid salt of formula (III) as a whole is uncharged, and D) 3 to 300 parts by mass, preferably 5 to 200 parts by mass, particularly preferably 10 to 120 parts by mass, especially preferably 15 to 90 parts by mass, of at least one glass-based filler and / or reinforcer and optionally with further additives in at least one mixing apparatus and finally processing the resulting mixture by injection moulding with the proviso that component B) is employed in lower mass fractions than component C).

8. Process according to Claim 7, characterized in that it employs polybutylene terephthalate, polyethylene terephthalate or poly-1,4-cyclohexanedimethanol terephthalate as component A).

9. Process according to Claim 7 or 8, characterized in that it employs aluminium tris(diethylphosphinate) as component C).

10. Process according to one or more of Claims 7 to 9, characterized in that it employs glass fibres as component D).

11. Process according to one or more of Claims 7 to 10, characterized in that it employs polybutylene terephthalate as component A), aluminium methylphosphonate of formula (la) as component B), aluminium tris(diethylphosphinate) as component C) and glass fibres as component D).

12. Use of the compositions according to one or more of Claims 1 to 5 for producing products, preferably products for electromobility, for household appliances and in the electronics and electricals sector.