Mineral-filled polycarbonate and / or polyester carbonate molding compound with a good degree of thermal stability

Abstract

The invention relates to a composition containing A) at least one polycarbonate and / or polyester carbonate, B) at least one inorganic filler, C) at least one special siloxane compound, and D) at least one polymer which contains carboxy and / or dicarboxylic acid anhydride groups and structural units derived from at least one olefin, to a method for producing a molding compound from such a composition, to a molding compound obtained using such a method, to a molded body containing such a molding compound or composition, and to the use of a combination of the components C and D in order to reduce the content of free bisphenol A in molding compounds produced by means of melt compounding and / or molded bodies produced by means of a thermal shaping process, in each case containing polycarbonate and / or polyester carbonate and inorganic fillers. The polycarbonate and / or the polyester carbonate contain structural units derived from bisphenol A in each case.

Description

[0001] Mineral-filled polycarbonate and / or polyester carbonate molding compound with good thermal stability

[0002] The present invention relates to a mineral-filled polycarbonate and / or polyester carbonate composition, a molding compound produced therefrom, a process for producing a mineral-filled polycarbonate molding compound, the use of the molding compound for producing a molded article, a molded article containing the molding compound and the use of a combination of an organopolysiloxane and a polymer containing carboxy groups and / or dicarboxylic anhydride groups and containing structural units derived from at least one olefin for reducing the content of free bisphenol A in molding compounds produced by melt compounding and / or molded articles produced by thermal molding, each containing polycarbonate and / or polyester carbonate and inorganic filler, wherein the polycarbonate and / or polyester carbonate each contains structural units derived from bisphenol A.

[0003] The reinforcement of polycarbonates or polyester carbonates by adding inorganic fillers is necessary for many applications, for example due to the resulting increase in material stiffness, material strength and thermal conductivity and / or the improvement in dimensional stability and accuracy (reduction of thermal expansion and warpage).

[0004] However, it is known that the addition of inorganic fillers, particularly talc, to molten polycarbonates or polyestercarbonates during melt compounding and / or thermal shaping of the resulting filled polymer molding compounds leads to degradation of the polymer chains. This polymer chain degradation ultimately results in poorer mechanical properties of the resulting molded articles and, in the case of polycarbonates or polyestercarbonates containing structural units derived from bisphenol A as a covalently incorporated component of the polymer chains (synonymously referred to below as aromatic polycarbonate or polyestercarbonate), often also in a high concentration of free bisphenol A monomer (BPA) in the compounded material and in molded articles produced from it by thermal shaping, which is undesirable from a regulatory perspective.

[0005] In the European Union, with the aim of reducing the release of BPA into the aquatic environment, a restriction under the REACH Regulation for BPA in polycarbonate-containing mixtures, i.e., in compositions and molding compounds, and in polycarbonate-containing articles, i.e., in molded bodies, is currently being discussed. Limit values ​​for free BPA in mixtures and articles in the range of 10 to 150 mg / kg (ppm) have been proposed as a prerequisite for future marketing. Therefore, in a first aspect of the invention, it was desirable to provide compositions suitable for producing polycarbonate or polyestercarbonate molding compounds containing inorganic filler, in particular containing talc, with improved thermal stability with respect to the undesirable degradation of the polymer chains during the production of the molding compounds by melt compounding and during the further thermal shaping of the molding compounds thus obtained.Such degradation of the polymer chains can be manifested, for example, in a decrease in the average molecular weight, a decrease in viscosity or an increase in free monomer units, i.e. units no longer bound to the polymer chain.

[0006] In a second aspect of the invention, it was particularly desired to provide compositions suitable for producing polycarbonate or polyester carbonate molding compounds and molded articles produced by thermal molding thereof, containing inorganic filler, in particular talc, wherein the polycarbonate or polyester carbonate contains structural units derived from bisphenol A and wherein the molding compounds and / or the molded articles have a reduced content of free bisphenol A. In such molding compounds, an increase in free bisphenol A during the thermal stress of their production and / or molding is an indication of undesirable degradation of polymer chains.

[0007] A well-known approach to improving the thermal stability of inorganic fillers, especially polycarbonate and polyester carbonate compositions containing talc in the melt, is the addition of Brønsted acids, which neutralize basic groups on the surface of the inorganic filler, which are responsible for the ester cleavage in the polycarbonate.

[0008] US 2006 / 0287422 A1 discloses thermoplastic polycarbonate compositions containing a mineral filler and a preferably inorganic acid or an acidic salt of a preferably inorganic acid, wherein the acid or acidic salt and filler are used in the composition in a weight ratio of at least 0.0035:1. Molding compounds made from such compositions exhibit improved mechanical properties and improved thermal stability of the polycarbonate with respect to molecular weight degradation.

[0009] WO 2013 / 060687 A1 discloses polycarbonate compositions stabilized with a Bronsted acid compound and optionally containing talc, which are produced using a special process in which the Bronsted acid compound is applied to an inorganic or organic adsorbent or absorber, preferably a finely divided silica, prior to compounding. Another approach to improving the thermal stability of polycarbonate and polyestercarbonate compositions containing inorganic fillers in the melt is sizing the filler, whereby basic groups on the surface of the inorganic filler, which are responsible for ester cleavage in the polycarbonate, are chemically masked, thus reducing degradation of the polymer chains.

[0010] EP 3250639 B1 discloses reinforced resin compositions with improved thermal stability, comprising 75 to 99 wt.% polycarbonate, a functionalizing agent, and an inorganic filler functionalized with the functionalizing agent. The functionalized inorganic filler is used in an amount of 1 to 25 wt.%, and the functionalizing agent comprises at least one organomodified silane selected from a methacrylate silane (MEMO-silane), a vinylsilane, a phenylsilane, an epoxysilane, and combinations thereof. However, silanes are rather undesirable components due to their volatility, potential toxicological effects, and physical hazard characteristics. Furthermore, this application also discloses, as a comparative example, a polycarbonate resin composition containing talc surface-functionalized with 0.5 wt.% of an organomodified alkylsiloxane.

[0011] EP 3504272 B1 discloses compositions for producing molded parts with improved multiaxial impact strength, obtained by mixing A) polycarbonate, B) unsized talc, and C) at least one anhydride-modified alpha-olefin polymer having an acid number of at least 30 mg KOH / g and an average molecular weight Mw of 4,000 to 40,000 g / mol, wherein the amounts of B) and C) prior to mixing are adjusted such that 0.10 to 1.4 parts by weight of component C) are used per 10 parts by weight of component B). Furthermore, this application discloses the use of the anhydride-modified alpha-olefin polymer having the aforementioned features for thermally stabilizing polycarbonate in a melt composition comprising unsized talc, wherein talc and anhydride-modified alpha-olefin polymer are used in the aforementioned parts by weight ratio.

[0012] None of the previously cited prior art documents discloses the extent to which the measures for thermal stabilisation of the polycarbonate affect the content of free bisphenol A monomer in mineral-filled polycarbonate or polyestercarbonate compositions obtained by melt compounding (also referred to as compounds or moulding compounds) and mouldings obtained therefrom by thermal shaping.In principle, thermal instability of the polycarbonate or polyester carbonate caused by the presence of inorganic fillers, which manifests itself in chain scission of the polymer, does not necessarily lead to a significant increase in the content of free bisphenol A monomer, since the hydrolysis of the polycarbonate and polyester carbonate responsible for chain degradation due to residual moisture that cannot be avoided during compounding or further thermal shaping can basically occur statistically at any carbonate group in the polymer chain and thus the attack at the chain end, which would lead to the release of free bisphenol A monomer, is initially relatively unlikely.This means that there may be a significant reduction in the polymer molecular weight and, as a result, a significant increase in melt flowability (e.g., measured by a Melt Flow Index MFR) even before a significant increase in the content of free bisphenol A in the compound or in the molded parts produced from it is observed.

[0013] Surprisingly, it was found that a composition containing

[0014] A) at least one polycarbonate and / or polyestercarbonate,

[0015] B) at least one inorganic filler,

[0016] C) at least one compound or a mixture of several different compounds of the general structural formula [V]

[0017] , wherein

[0018] Rs represent identical or different radicals selected from the group consisting of linear or branched alkyl, aryl, alkylaryl or arylalkyl radicals having 1 to 25 carbon atoms and haloalkyl, haloaryl, haloalkylaryl or haloarylalkyl radicals having 1 to 25 carbon atoms,

[0019] R4 represent identical or different alkylene radicals having 1 to 20 C atoms, which may optionally contain ether, ester, urethane or amide groups,

[0020] Rs represent identical or different oxyalkylene radicals of the general formula [Va], where in formula [Va]

[0021] Rsa, Rsa and Rsb independently of one another represent identical or different, optionally branched, optionally heteroatom-substituted alkyl or aryl radicals or hydrogen, k is an integer from 2 to 11, a, b are identical or different integers between 1 and 4 and na and nb are identical or different integers between 0 and 50, where k, na and nb each indicate the number of structural units shown in the respective brackets in the oxyalkylene radical according to the general formula [Va] and where these structural units shown in the brackets can be present both in block form and in a random arrangement in the oxyalkylene radicals of the general formula [Va],

[0022] R„ represents identical or different radicals selected from the group consisting of Rs, -RbSiR?)^ Rs or H,

[0023] R? represent identical or different alkyl, alkoxy, aryl or aryloxy radicals having 1 to 20 carbon atoms, with the proviso that R? at least one C1- to C5-alkoxy group, and n is an integer from 0 to 20, m is an integer from 0 to 20, o is an integer from 0 to 20 and p is an integer from 1 to 200, where n, m, o and p each indicate the number of structural units shown in the respective brackets in the organopolysiloxane and where these structural units shown in the brackets can be present both in block form and in a random arrangement in the organopolysiloxane, where either m and / or o are > 1 and / or at least one radical Rs in the compound according to formula [V] is a linear or branched alkyl, aryl, alkylaryl or arylalkyl radical having 5 to 25 carbon atoms and where the value of the sum n+m+o+p is > 5,

[0024] D) a polymer containing at least one carboxy- and / or dicarboxylic anhydride group and containing structural units derived from at least one olefin, fulfills the above-mentioned first aspect of the invention. Furthermore, it has surprisingly been found that a composition as described above, wherein component A contains structural units derived from bisphenol A, fulfills the above-mentioned second aspect of the invention.

[0025] Component C is used in the compositions according to the invention preferably in an amount of 0.2 to 5 parts by weight, more preferably 0.5 to 2 parts by weight, particularly preferably 0.7 to 1.5 parts by weight, based on a total of 100 parts by weight of components B and C.

[0026] Component D is preferably used in the compositions according to the invention in an amount of 1 to 15 parts by weight, particularly preferably 2 to 10 parts by weight, particularly preferably 3 to 7 parts by weight, based on a total of 100 parts by weight of components B and D.

[0027] Preferably, the composition contains

[0028] 25 to 95% by weight, more preferably 30 to 85% by weight, particularly preferably 40 to 75% by weight of component A,

[0029] 1 to 50% by weight, more preferably 3 to 40% by weight, particularly preferably 5 to 30% by weight of component B,

[0030] 0.002 to 2.5 wt.%, more preferably 0.0.15 to 0.8 wt.%, particularly preferably 0.035 to 0.45 wt.% of component C, and 0.01 to 7.5 wt.%, more preferably 0.06 to 4.0, particularly preferably 0.15 to 2.1 wt.% of component D.

[0031] The stated weight percentages refer to the total composition.

[0032] In a preferred embodiment, component C is present at least partially as a coating on the surface of component B (hereinafter also referred to synonymously as surface treatment). The term “coating” in the sense of the invention means that component C is in contact with the surface of component B. Component C can be chemically bonded to component B or can be in contact with the surface of component B via purely physical interactions. It is also possible for part of the proportion of component C present as a coating on the surface of component B to be chemically bonded to component B and another part to be in contact with the surface of component B via purely physical interactions.

[0033] It is therefore also possible for component C to be used partially or completely as a constituent of at least one sized inorganic filler in the composition, wherein the sizing material contains an organopolysiloxane according to component C or consists of an organopolysiloxane according to component C. In this case, at least a portion of components B and C is used as a preparation containing components B and C as a constituent of the compositions according to the invention. In this case, the above-mentioned proportions of components B and C refer to the sum of the proportions of the respective components which are used in the compositions according to the invention in the form of one or more preparations of components B and C and optionally as additional, separately used amounts of components B and / or C.

[0034] As component E, one or more polymer additives and / or process aids and / or further polymeric components may be present in the composition, preferably in an amount of 0.01 to 70% by weight, more preferably 0.05 to 50% by weight, particularly preferably 0.1 to 40% by weight.

[0035] In a specific embodiment, the composition contains further polymeric components according to component E in an amount of not more than 2 wt.%. In this case, component E is used in a total amount of preferably 0.01 to 5 wt.%, more preferably 0.05 to 3 wt.%, particularly preferably 0.1 to 2 wt.%.

[0036] In a preferred embodiment, the composition consists of 90 wt.%, more preferably 95 wt.% and most preferably only of components A, B, C, D and E.

[0037] Component A

[0038] Polycarbonates and / or polyestercarbonates according to component A which are suitable for use in the invention are known from the literature or can be prepared by processes known from the literature (for the preparation of polycarbonates, see, for example, Schnell, "Chemistry and Physics of Polycarbonates", Interscience Publishers, 1964 and DE-AS 1 495 626, DE-A 2 232 877, DE-A 2 703 376, DE-A

[0039] 2 714 544, DE-A 3 000 610, DE-A 3 832 396; for the production of polyester carbonates, e.g. DE-A

[0040] 3 007 934).

[0041] Polycarbonates suitable according to the invention as component A are prepared, for example, by reacting at least one aliphatic or aromatic diol, preferably bisphenol A and optionally further diphenols and / or aliphatic diols, more preferably bisphenol A and optionally further diphenols, particularly preferably bisphenol A, with carbonic acid halides, preferably phosgene and / or with aromatic dicarboxylic acid dihalides, preferably benzenedicarboxylic acid dihalides, by the interfacial process, optionally using chain terminators, for example monophenols, and optionally using trifunctional or more than trifunctional branching agents, for example triphenols or tetraphenols. Likewise, production via a melt polymerization process is possible by reacting the aforementioned diols and diol mixtures with, for example, diphenyl carbonate.

[0042] In addition to bisphenol A, diphenols suitable for the preparation of the aromatic polycarbonates preferably suitable as component A according to the invention and / or for the preparation of the aromatic polyester carbonates preferably suitable as component A according to the invention are preferably those of the formula (I)

[0043] (I), where

[0044] A is a single bond, C1 to C5 alkylene, C2 to C5 alkylidene, C5 to C5 cycloalkylidene, -O-, -SO-, -CO-, -S-, -SO2-, C5 to Cn arylene, to which further aromatic rings optionally containing heteroatoms may be condensed, or a radical of the formula (II) or (III)

[0045] B is each Ci to Cn-alkyl, preferably methyl, halogen, preferably chlorine and / or bromine, x is each independently 0, 1 or 2, p is 1 or 0, and

[0046] R 5 and R 6 for each X 1individually selectable, independently of one another, hydrogen or Ci to Ce-alkyl, preferably hydrogen, methyl or ethyl,

[0047] XI is carbon and m is an integer from 4 to 7, preferably 4 or 5, with the proviso that at least one atom X 1 , R 5 and R 6 are simultaneously alkyl. Preferred diphenols used alongside bisphenol A are hydroquinone, resorcinol, dihydroxydiphenols, bis(hydroxyphenyl)C1-C5-alkanes, bis(hydroxyphenyl)C5-C6-cycloalkanes, bis(hydroxyphenyl) ethers, bis(hydroxyphenyl) sulfoxides, bis(hydroxyphenyl) ketones, bis(hydroxyphenyl) sulfones, and a,a-bis(hydroxyphenyl)diisopropylbenzenes, as well as their nuclear-brominated and / or nuclear-chlorinated derivatives.

[0048] Particularly preferred further diphenols are 4,4'-dihydroxydiphenyl, 2,4-bis(4-hydroxyphenyl)-2-methylbutane, 1,1-bis(4-hydroxyphenyl)cyclohexane, 1,1-bis(4-hydroxyphenyl)-3,3,5-trimethylcyclohexane, 4,4'-dihydroxydiphenyl sulfide, 4,4'-dihydroxydiphenyl sulfone and their di- and tetrabrominated or chlorinated derivatives such as, for example, 2,2-bis(3-chloro-4-hydroxyphenyl)propane, 2,2-bis(3,5-dichloro-4-hydroxyphenyl)propane or 2,2-bis(3,5-dibromo-4-hydroxyphenyl)propane.

[0049] These diphenols can be used individually or as mixtures. The diphenols are known from the literature or are available using known methods.

[0050] The polycarbonates used according to the invention preferably contain at least 20% by weight, more preferably at least 50% by weight, particularly preferably at least 80% by weight, most preferably 100% by weight, in each case based on the sum of all structural units derived from bisphenols, of structural units derived from bisphenol A.

[0051] Suitable aliphatic diols are selected from the group consisting of 1,2-cyclohexanediol, 1,3-cyclohexanediol, 1,4-cyclohexanediol, 1,2-cyclohexanedimethanol, 1,3-cyclohexanedimethanol, 1,4-cyclohexanedimethanol, 2,2-bis(4-hydroxycyclohexyl)propane, tetrahydro-2,5-fluorandimethanol, 2-butyl-2-ethyl-1,3-propanediol, 2-(2-hydroxyethoxy)ethanol, 2,2,4,4-tetramethyl-1,3-cyclobutanediol, 2,2,4-trimethyl-1,3-pentanediol, 2,2-dimethylpropane-1,3-diol, cyclobutane-1,1-diyldimethanol, 8-(Hydroxymethyl)-3-tricyclo[5.2.1.02,6]decanyl]methanol, 1,2-propanediol, 1,3-propanediol, 1,4-butanediol, 1,5-pentanediol, 1,6-hexanediol, 1,8-octanediol, isosorbide and any mixtures thereof.

[0052] Chain terminators suitable for the production of polycarbonates are, for example, phenol, p-chlorophenol, p-tert-butylphenol or 2,4,6-tribromophenol, but also long-chain alkylphenols, such as 4-[2-(2,4,4-trimethylpentyl)]phenol, 4-(1,3-tetramethylbutyl)phenol according to DE-A 2 842 005 or monoalkylphenol or dialkylphenols with a total of 8 to 20 carbon atoms in the alkyl substituents, such as 3,5-di-tert-butylphenol, p-iso-octylphenol, p-tert-octylphenol, p-dodecylphenol and 2-(3,5-dimethylheptyl)phenol and 4-(3,5-dimethylheptyl)phenol. The amount of chain terminators to be used is generally between 0.5 mol% and 10 mol%, based on the molar sum of the diphenols used. The thermoplastic, aromatic polycarbonates have average molecular weights (weight average M w) of preferably 17,000 to 40,000 g / mol, more preferably 20,000 to 35,000 g / mol, particularly preferably 24,000 to 32,000 g / mol, measured by GPC (gel permeation chromatography) using dichloromethane as solvent, calibration with linear polycarbonates (from bisphenol A and phosgene) of known molar mass distribution from PSS Polymer Standards Service GmbH, Germany, calibration according to method 2301-0257502-09D (from 2009 in German) from Currenta GmbH & Co. OHG, Leverkusen. The eluent is dichloromethane. Column combination of cross-linked styrene-divinylbenzene resins. Diameter of the analytical columns: 7.5 mm; length: 300 mm. Particle sizes of the column material: 3 pm to 20 pm. Concentration of the solutions: 0.2 wt.%. Flow rate: 1.0 ml / min, solution temperature: 30°C. Use of UV and / or RI detection.Due to the preferred molecular weight ranges, a particularly advantageous balance of mechanical and rheological properties is achieved in the compositions according to the invention.

[0053] The polycarbonates can be branched in a known manner, preferably by incorporating 0.05 to 2.0 mol%, based on the total of the diphenols used, of trifunctional or more than trifunctional compounds, for example those with three or more phenolic groups. Linear polycarbonates, more preferably based on bisphenol A, are preferred.

[0054] Both homopolycarbonates and copolycarbonates are suitable. For the preparation of inventive copolycarbonates according to component A, 1 to 25 wt. %, preferably 2.5 to 25 wt. %, based on the total amount of diphenols to be used, of polydiorganosiloxanes with hydroxyaryloxy end groups can also be used. These are known (US Pat. No. 3,419,634) and can be prepared by processes known from the literature. The preparation of polydiorganosiloxane-containing copolycarbonates is described, for example, in DE-A 3 334 782 and WO 2015 / 052106 A2.

[0055] Copolycarbonates produced using diphenols of the following structures are also preferred: where RI is hydrogen, Ci- to C4-alkyl, preferably hydrogen or methyl and particularly preferably hydrogen,

[0056] R2 independently represent aryl or alkyl, preferably methyl,

[0057] X represents a single bond, -SO2-, -CO-, -O-, -S-, C1- to C2-alkylene, C2- to C5-alkylidene or C2- to C5-arylene, which may optionally be condensed with further aromatic rings containing heteroatoms,

[0058] X preferably represents a single bond, C1- to C5-alkylene, C2- to C5-alkylidene, C5- to C12-cycloalkylidene, -O-, -SO- -CO-, -S-, -SO2-, particularly preferably X represents a single bond, isopropylidene, C5- to C12-cycloalkylidene or oxygen, and very particularly preferably isopropylidene, n represents an average number from 10 to 400, preferably 10 and 100, particularly preferably 15 to 50 and m represents an average number from 1 to 10, preferably from 1 to 6 and particularly preferably from 1.5 to 5.

[0059] Aromatic dicarboxylic acid dihalides for the production of polyester carbonates are preferably the diacid dichlorides of isophthalic acid, terephthalic acid, diphenyl ether-4,4'-dicarboxylic acid, and naphthalene-2,6-dicarboxylic acid. Particularly preferred are mixtures of the diacid dichlorides of isophthalic acid and terephthalic acid in a ratio of between 1:20 and 20:1. In the production of polyester carbonates, a carbonic acid halide, preferably phosgene, is additionally used as a bifunctional acid derivative.

[0060] In addition to the monophenols already mentioned, suitable chain terminators for the production of polyester carbonates are their chlorocarbonic acid esters and the acid chlorides of aromatic monocarboxylic acids, which may optionally be substituted by C1 to C22 alkyl groups or by halogen atoms, as well as aliphatic C2 to C22 monocarboxylic acid chlorides.

[0061] The amount of chain terminators is 0.1 to 10 mol%, based on moles of diphenol in the case of phenolic chain terminators and on moles of dicarboxylic acid dichloride in the case of monocarboxylic acid chloride chain terminators. One or more aromatic hydroxycarboxylic acids can also be used in the production of polyester carbonates.

[0062] The polyester carbonates can be either linear or branched in a known manner (see DE-A 2 940 024 and DE-A 3 007 934), with linear polyester carbonates being preferred.

[0063] As branching agents, for example, trifunctional or polyfunctional carboxylic acid chlorides, such as trimesic acid trichloride, cyanuric acid trichloride, 3,3'-,4,4'-benzophenonetetracarboxylic acid tetrachloride, 1,4,5,8-naphthalenetetracarboxylic acid tetrachloride or pyromellitic acid tetrachloride, in amounts of 0.01 to 1.0 mol% (based on dicarboxylic acid dichlorides used) or trifunctional or polyfunctional phenols, such as phloroglucinol, 4,6-dimethyl-2,4,6-tri-(4-hydroxyphenyl)-hept-2-ene, 4,6-dimethyl-2,4-6-tri-(4-hydroxyphenyl)-heptane, 1,3,5-tri-(4-hydroxyphenyl)-benzene, 1,1,1-tri-(4-hydroxyphenyl)-ethane, tri-(4-hydroxyphenyl)-phenylmethane, 2,2-Bis[4,4-bis(4-hydroxy-phenyl)-cyclohexyl]-propane, 2,4-bis(4-hydroxyphenyl-isopropyl)-phenol, tetra-(4-hydroxyphenyl)-methane, 2,6-bis(2-hydroxy-5-methyl-benzyl)-4-methyl-phenol, 2-(4-hydroxyphenyl)-2-(2,4-dihy- droxyphenyl) propane, tetra-(4-[4-hydroxyphenyl-isopropyl]-phenoxy)-methane, l,4-bis[4,4'-dihydroxytri-phenyl)-methyl]-benzene, in amounts of 0,01 to 1.0 mol% based on the diphenols used. Phenolic branching agents can be added with the diphenols; acid chloride branching agents can be added together with the acid dichlorides.

[0064] The proportion of carbonate structural units in the polyester carbonates can vary as desired. The proportion of carbonate groups is preferably up to 90 mol%, in particular up to 80 mol%, and particularly preferably up to 50 mol%, based on the sum of ester groups and carbonate groups. Both the ester and carbonate portions of the polyester carbonates can be present in the form of blocks or randomly distributed in the polycondensate.

[0065] The polycarbonates and polyester carbonates can be used alone or in any mixture.

[0066] Linear polycarbonate based exclusively on bisphenol A is preferably used as component A.

[0067] Component B

[0068] The composition contains at least one inorganic filler as component B. In the context of the present invention, the term "inorganic filler" means any type of inorganic material, regardless of its chemical nature and origin, for example with regard to natural or synthetic origin, particle size and particle geometry, and in particular also regardless of its function in the composition according to the invention. Thus, "inorganic fillers" according to component B do not exclusively mean those inorganic materials that merely serve to fill the polymer for the purpose of cost dilution. Rather, the term "inorganic filler" also includes, in particular, inorganic functional fillers used as functional additives, such as reinforcing materials, pigments, flame retardants, etc.

[0069] Preferably, at least one inorganic filler selected from the group consisting of quartz compounds, talc, wollastonite, kaolin, CaCO3, titanium dioxide and other inorganic pigments, Al(OH)2, AlO(OH), Mg(OH)2, mica, and glass fibers is used as component B in the compositions according to the invention. Preferred compositions contain talc as a constituent of component B. In particularly preferred compositions, talc is used exclusively as component B, in addition to inorganic pigments optionally used for coloring.

[0070] The inorganic fillers according to component B can be fully or partially surface-modified with a sizing agent different from component C, which contains at least one or a combination of several organic substances, some of which can be chemically bound to the inorganic filler (for example, when acting as an adhesion promoter), and some of which can be free, i.e., unbound, physically wetting the inorganic filler. The free portion of this sizing agent, i.e., not chemically bound to the inorganic filler, can be separated by extraction, for example and preferably in dichloromethane, and subjected to analysis.

[0071] Suitable glass fibers according to component B are preferably made of E, A, or C glass. The average diameter of the glass fiber is preferably 5 to 25 μm, particularly preferably 6 to 20 μm, most preferably 7 to 15 μm. Chopped glass fibers have an average cut length of preferably 1 to 10 mm, preferably 2.0 to 7.5 mm, and particularly preferably 2.5 to 5.0 mm.

[0072] Particularly preferably, glass fibers with an aspect ratio, i.e. a quotient of average fiber length to average fiber diameter, of at least 100, particularly preferably of at least 200, especially preferably of at least 300 are used.

[0073] The aforementioned geometric characteristics of the glass fibers (length, diameter, and aspect ratio) are determined on the component B used (i.e., before the preparation of the composition according to the invention and in particular before the preparation of the thermal molding compositions according to the invention and the molded articles according to the invention obtained therefrom by thermal molding). Naturally, during the production of the compositions, molding compositions, and molded articles by physical mixing processes, compounding, or thermal molding, a reduction in this aspect ratio, for example due to shearing, cannot be ruled out, so that the glass fibers in the compositions, molding compositions, and molded articles according to the invention generally have a lower aspect ratio than originally determined on the component B used.

[0074] Suitable quartz compounds include, for example, and preferably, those that consist of more than 97% silicon dioxide (quartz). The grain shape is spherical and / or nearly spherical.

[0075] The quartz compounds are preferably finely divided (amorphous) quartz powders, which are produced from electrically melted silicon dioxide by iron-free grinding followed by air separation. It is also possible to use quartz powders made from processed quartz sand.

[0076] Commercially available fused silica flours include Amosil™ FW600 and Amosil™ FW600 from Quarzwerke GmbH (Germany). Commercially available quartz flours include Sikron™ SF300, Sikron™ SF600, Sikron™ SF800, Silbond™ SF600 EST from Quarzwerke GmbH (Germany), and Mikro-Dorsilit™ 120 from QUARZSANDE GmbH (Austria).

[0077] For the purposes of the invention, talc includes all talc-based fillers that a person skilled in the art associates with talc or talcum. In particular, all commercially available fillers whose product descriptions include the terms talc or talcum as characterizing features are considered suitable.

[0078] Mixtures of different mineral fillers based on talc can also be used.

[0079] According to the invention, mineral fillers are preferred which have a talc content according to DIN 55920 (version of 2006) of greater than 80 wt.%, preferably greater than 95 wt.% and particularly preferably greater than 98 wt.%, based on the total mass of filler.

[0080] Talc is a naturally occurring or synthetically produced talc.

[0081] Pure talc has the chemical composition 3MgO 4SiO2 H2O, and thus an MgO content of 31.9 wt.%, an SiO2 content of 63.4 wt.%, and a chemically bound water content of 4.8 wt.%. It is a silicate with a layered structure.

[0082] Naturally occurring talc materials generally do not have the ideal composition listed above, as they are contaminated by partial replacement of magnesium by other elements, by partial replacement of silicon by, for example, aluminum and / or by intergrowths with other minerals such as dolomite, magnesite and chlorite.

[0083] The talc types used as component B are preferably characterized by particularly high purity, characterized by an MgO content of 28 to 35 wt.%, preferably 30 to 33 wt.%, particularly preferably 30.5 to 32 wt.%, and an SiCE content of 55 to 65 wt.%, preferably 58 to 64 wt.%, particularly preferably 60 to 62.5 wt.%. The particularly preferred talc types are further characterized by an AEOs content of less than 5 wt.%, particularly preferably less than 1 wt.%, in particular less than 0.7 wt.%.

[0084] Particularly advantageous and therefore preferred is the use of the talc according to the invention in the form of finely ground grades with an average particle size d50 of <10 pm, preferably <5 pm, more preferably <4 pm, and particularly preferably <3 pm. Larger average particle sizes have a detrimental effect on the mechanical properties of the molding compositions according to the invention and molded parts produced therefrom.

[0085] Furthermore, it is advantageous and preferred to use talc with an average particle size d50 of >0.2 pm, preferably >0.5 pm, more preferably >1 pm, and particularly preferably >2 pm. Smaller average particle sizes have a detrimental effect on the free bisphenol A content in the molding compositions according to the invention and molded parts produced therefrom.

[0086] In this respect, it is particularly advantageous to use talc with an average particle size d50 of 0.2 to 10 pm, preferably 0.5 to 5 pm, more preferably 1 to 4 pm, and particularly preferably 2 to 3 pm. Talc with these geometric particle dimensions can be produced, for example, and preferably, by wet grinding with the addition of, for example, and preferably, water. The average particle size d50 is the diameter, measured by sedimentation analysis according to ISO 13317-3 (version 2001-03), above and below which 50 wt.% of the particles lie. Mixtures of talc types that differ in their average particle size d50 can also be used.

[0087] The talc types to be used according to the invention preferably have an upper particle or grain size d^, also measured by sedimentation analysis according to ISO 13317-3 (version 2001-03), of less than 30 pm, preferably less than 20 pm, particularly preferably less than 10 pm, and especially preferably less than 8 pm.

[0088] With regard to the processing and production of molding compounds, the use of compacted talc is also advantageous. Compacted talc can be produced, for example, and preferably, by mixing ground talc with water and optionally other processing aids, followed by compression under increased pressure. Due to the processing into the molding compound or molded articles, the talc used may have a lower d α or d 50 value in the molding compound or molded article than in the originally used form.

[0089] Kaolin, preferably calcined kaolin, can also be used as component B.

[0090] The main component of naturally occurring kaolin is kaolinite (AE OHfil&Os). Minor components are feldspars, mica, and quartz. In addition to this composition, kaolins can also be used that contain nacrite, dickite, halloysite, and hydrated halloysite instead of or in addition to kaolinite.

[0091] The calcined kaolin according to the invention is obtained by heat-treating a kaolin at at least 500°C, preferably from 850°C to 1100°C. The hydroxyl groups that form part of the crystal structure of the kaolin are lost during this heat treatment, and the kaolin is transformed into calcined kaolin.

[0092] Furthermore, organically surface-modified wollastonites can also be used as inorganic fillers according to the invention, optionally. Organically surface-modified wollastonites preferably have a carbon content, based on the wollastonite, of greater than 0.1 wt. %, preferably 0.2 to 2 wt. %, particularly preferably 0.3 to 1 wt. %, most preferably 0.3 to 0.6 wt. %, determined by elemental analysis. Such wollastonites are commercially available, for example, under the trade name Nyglos™ from NY CO Minerals Inc., Willsboro, NY, USA, and the type designations Nyglos™ 4 or Nyglos™ 5, or—in the case of surface-modified wollastonites—under the type designations Nyglos™ 4-10992 or Nyglos™ 5-10992.

[0093] Preferred wollastonites have an average aspect ratio, i.e. a ratio of the average length of the fiber to the average diameter, of >6, in particular >7 and an average fiber diameter of 1 to 15 pm, preferably 2 to 10 pm, in particular 4 to 8 pm.

[0094] Another suitable inorganic filler is calcium carbonate (CaCO3). Calcium carbonate occurs naturally in the form of minerals such as calcite, aragonite, and vaterite, and is a major component of limestone, chalk, and marble. Calcium carbonate can also be produced synthetically, which can be advantageous due to its higher purity. Calcium carbonate with an average particle diameter d50 of 0.1 to 5 pm is preferred.

[0095] Another suitable inorganic filler is aluminum hydroxide Al(OH)3. Aluminum hydroxide occurs naturally in the form of minerals such as gibbsite, bayerite, and nordstandite. Aluminum hydroxide can also be produced synthetically, which can be advantageous due to its higher purity. Calcium carbonate with an average particle diameter d50 of 1 to 5 pm is preferred.

[0096] Another suitable inorganic filler is mica or metal oxide-coated mica. The mica can be naturally occurring or synthetically produced mica, the latter being preferred due to its typically higher purity. Mica obtained from nature is usually accompanied by other minerals. "Mica" in the case of naturally obtained inorganic filler also includes corresponding impurities in the stated amount. The mica is preferably muscovite-based, i.e. it preferably comprises at least 60 wt.%, more preferably at least 70 wt.%, even more preferably at least 85 wt.%, most preferably at least 90 wt.% muscovite, based on the total weight of the mica content.

[0097] In metal oxide-coated micas, the metal oxide coating preferably comprises one or more coating layers containing titanium dioxide, tin oxide, aluminum oxide, and / or iron oxide, with the metal oxide more preferably being iron(III) oxide (Fe2O3), iron(II,III) oxide (Fe3O4, a mixture of Fe2O3 and FeO), and / or titanium dioxide, particularly preferably titanium dioxide. Such metal oxide-coated micas are generally used as effect pigments.

[0098] The mean particle size (d50) of the optionally metal oxide-coated mica, determined by means of laser diffractometry on an aqueous slurry of the pigment, is preferably 1 to 100 pm, for synthetic mica more preferably 5 to 80 pm and for natural mica more preferably 3 to 30 pm, generally for mica more preferably 3.5 to 15 pm, very preferably 4.0 to 10 pm, extremely preferably 4.5 to 8.0 pm.

[0099] Commercially available suitable micas include products from the Tremica™ product group from HPF Minerals (Quarzwerke Group, Germany).

[0100] As component B or as part of component B, one or more pigments based on titanium dioxide, iron oxide, aquamarine, ultramarine blue, zinc white and zinc oxide can also preferably be used as inorganic fillers.

[0101] These are naturally occurring, synthetically produced, or modified naturally occurring pigments, or mixtures thereof. The titanium dioxide pigments preferably have a crystal structure modification of rutile, anatase, or brookite. The preferred modification is rutile. Pigments based on titanium dioxide according to the invention have a density (according to DIN EN ISO 787-10) of 3.6 to 4.4 g / cm³. 3 , preferably from 3.8 to 4.3 g / cm 3 , particularly preferably from 4.0 to 4.2 g / cm 3 .

[0102] The pigments based on titanium dioxide can be obtained in a known manner by the sulfate process or the chloride process from natural raw materials such as ilmenite, rutile ore or TiO2 slag.

[0103] The pigments may have an inorganic surface modification, preferably based on aluminum compounds. The proportion of titanium dioxide (according to DIN EN ISO 591) is preferably > 90 wt.%, particularly preferably > 92 wt.%, further preferably > 95 wt.%.

[0104] In a preferred embodiment, the pigments have an oil absorption (according to ISO787-5) of 5 to 50 g / 100 g pigment, more preferably of 10 to 25 g / 100 g pigment and particularly preferably of 12 to 18 g / 100 g pigment.

[0105] Component C

[0106] Component C according to the invention is an organopolysiloxane containing at least one structural unit of the general formula (IV): wherein Ri and R2 independently of one another represent hydrogen or hydrocarbon radicals, each of which may be substituted or unsubstituted and optionally interrupted by heteroatoms such as O, N or Si and may be linear, branched or cyclic, wherein the organopolysiloxane contains at least one structural unit according to the general formula (IV) in which at least one of the radicals Ri or R2 is other than hydrogen and methyl, and wherein the organopolysiloxane is free of siloxane structural units in which two hydrogen atoms are bonded to the same silicon atom.

[0107] Preferred hydrocarbon radicals R1 and R2 are, for example, alkyl, aryl, alkylaryl, arylalkyl, or cycloalkyl groups, each of which may be substituted or unsubstituted and optionally interrupted by heteroatoms. The radicals R1 and R2 are preferably hydrocarbon radicals having 1 to 25 carbon atoms.

[0108] Examples of hydrocarbon R1 and R2 are methyl, ethyl, n-propyl, isopropyl, n-butyl, isobutyl, tert-butyl, n-pentyl, isopentyl, neopentyl, tert-pentyl, hexyl, heptyl, octyl, nonyl, decyl, dodecyl, octadecyl, cycloalkyl, such as cyclopentyl, cyclohexyl, cycloheptyl, and methylcyclohexyl; aryl, such as phenyl, biphenyl, naphthyl, anthryl, and phenanthryl; alkaryl, such as o-, m-, p-tolyl, xylyl, and ethylphenyl; Aralkyl residues, such as the benzyl residue, the α- and β-phenylethyl residue.

[0109] In an equally preferred embodiment, the organopolysiloxane has the structure according to formula (V): wherein

[0110] Rs represent identical or different radicals selected from the group of linear or branched alkyl, aryl, alkylaryl or arylalkyl radicals having 1 to 25 carbon atoms, in particular 1 to 20 carbon atoms or haloalkyl groups having 1 to 25 carbon atoms, in particular 1 to 20 carbon atoms, where preferably at least 50 mol%, more preferably at least 70 mol%, most preferably at least 80 mol% of the radicals R3 are methyl groups,

[0111] R4 represents identical or different alkylene radicals having 1 to 20 C atoms, preferably having 1 to 10 C atoms, in particular having 2 to 5 C atoms, which may optionally contain ether, ester, urethane or amide groups, particularly preferably ethylene radicals,

[0112] Rs represent identical or different oxyalkylene radicals of the formula (Va), where

[0113] Rsa, Rsa, and Rsb independently of one another represent identical or different, optionally branched, optionally heteroatom-substituted alkyl or aryl radicals or hydrogen, preferably hydrogen, methyl and / or ethyl radicals, and k is an integer from 2 to 11, a, b are identical or different integers between 1 and 4, and na and nb are identical or different integers between 0 and 50, with preferably 1 < na+nb < 50, more preferably 1 < na+nb < 30, in particular 1 < na+nb < 15, where k, na and nb each indicate the number of structural units shown in the respective brackets in the oxyalkylene radical according to the general formula [Va], and where these structural units shown in the brackets can be present both in block form and in a random arrangement in the oxyalkylene radicals of the general formula [Va],

[0114] R„ represents identical or different radicals selected from the group consisting of Rs, -R4-Si(R?), Rs or H,

[0115] R? represent identical or different alkyl, alkoxy, aryl or aryloxy radicals having 1 to 20 carbon atoms, with the proviso that R? at least one C1- to C5-alkoxy group, preferably a methoxy and / or ethoxy group, n is an integer from 0 to 20, preferably 0 to 10, in particular 0 to 5, particularly preferably 0, m is an integer from 0 to 20, preferably 0 to 10, in particular 0 to 5, particularly preferably 0, o is an integer from 0 to 20, preferably 0 to 10, in particular 0 to 5, particularly preferably 0, p is an integer from 1 to 200, preferably 10 to 100, in particular 15 to 50, where n, m, o and p each indicate the number of structural units shown in the respective brackets in the organopolysiloxane and where these structural units shown in the brackets can be present both in block form and in a random arrangement in the organopolysiloxane,where either m and / or o are > 1 and / or at least one radical Rs in the compound according to formula [V] is a linear or branched alkyl, aryl, alkylaryl or arylalkyl radical having 5 to 25 carbon atoms and where the value of the sum n+m+o+p is preferably >5, further preferably >10, particularly preferably >15, most preferably >20.

[0116] Due to this preferred value of the sum n+m+o+p, the organopolysiloxane (also referred to as polyorganosiloxane) has a minimum molecular weight and migrates less strongly to the surface of molded articles containing the composition according to the invention. This reduces negative effects on the surface impression and on the bond strength to other materials such as paints, foams, other thermoplastic materials, and metals. The phrase "identical or different radicals" means that, on the one hand, radicals with the same index, such as R3, can be identical or different within a specific structural unit. On the other hand, the organopolysiloxane can also contain structural units that belong to the same general structure indicated in the respective parentheses, but differ from other structural units also belonging to this general structure with regard to the specific radicals, such as R3.

[0117] In a further preferred embodiment, the organopolysiloxanes contain structural units according to the formula [VIb] and structural units selected from at least one representative selected from the group of structural units according to the formulas [Via] and [Vic].

[0118] [Via] [VIb] [Vic]

[0119] The alkyl radical in formula [Via] contains 5 to 23 carbon atoms, preferably 7 to 20 carbon atoms, particularly preferably 10 to 18 carbon atoms. Further preferably, the carbon atom of the alkyl radical bonded to the Si-CFE group has two hydrogen atoms, i.e., it is another CIA group. Further preferably, the alkyl radical is linear.

[0120] In a further preferred embodiment, the organopolysiloxanes, apart from the end groups, consist of structural units according to the formula [VIb] and structural units selected from at least one representative selected from the group of structural units according to the formulas [Via] and [Vic]. - TI -

[0121] In a specific embodiment, the organopolysiloxanes, apart from the end groups, consist of structural units according to the formulas [VIa] and [VIb], more preferably in a molar ratio [VIa] / [VIb] of 0.10 to 0.70, more preferably in a molar ratio of 0.15 to 0.50, particularly preferably in a molar ratio of 0.25 to 0.45.

[0122] The molar ratio [VIa] / [VIc] of the structural units according to the formulas [Via] and [Vic] is preferably in the range from 0 to 10, more preferably in the range from 0 to 5, particularly preferably in the range from 0 to 2. In a further preferred embodiment, the molar ratio [VIa] / [VIc] is equal to 0.

[0123] The molar ratio ([VIa]+[VIc]) / [VIb] of the structural units according to the formulas [Via], [VIb] and [Vic] is preferably in the range from 0.10 to 1.00, more preferably in the range from 0.20 to 0.50, particularly preferably in the range from 0.30 to 0.45.

[0124] In a further preferred embodiment, the organopolysiloxane contains the structural units according to the formulas [Via], [VIb], and [Vic]. The above-mentioned preferred ranges regarding the molar ratios of the structural units also apply in this preferred embodiment.

[0125] The organopolysiloxanes according to the invention can be characterized with regard to their structure by means of 'H-NMR spectroscopy in deuterated chloroform at room temperature. The following characteristic signals are obtained for organopolysiloxanes containing the structural units according to the formulas [Via], [VIb] and [Vic]: a) 0.01 - 0.20 ppm (3H, CH, bonded to Si), relative integral intensity: ab) 0.44-0.65 ppm (CFF bonded to Si), relative integral intensity: bc) 0.88 ppm (3H, terminal CH, in the alkyl radical), relative integral intensity: cd) 1.16-1.42 ppm (CFF in aliphatic chain & CH, in ethoxy group), relative integral intensity: de) 3.81 ppm (6H, CEE in ethoxy group), relative integral intensity: e

[0126] From the values ​​c and e of the relative integral intensities of the 'H NMR signals c) and e), the molar ratio of the structural units according to the formulas [Via] and [Vic] for component C-2 is determined according to the formula [VIa] / [VIc] = 2c / e. Therefore, the ratio 2c / e of the relative integral intensities of the corresponding 'H NMR signals of preferred organopolysiloxanes is in the range from 0 to 10, more preferably in the range from 0 to 5, and particularly preferably in the range from 0 to 2.

[0127] From the values ​​a, c, and e of the relative integral intensities of the 'H NMR signals a), c), and e), the molar ratio ([VIa]+[VIc]) / [VIb] of the structural units according to the formulas [Via], [VIb], and [Vic] is obtained according to the formula ([VIa]+[VIc]) / [VIb] = (4c+2e) / (2a-2c-e). Therefore, the ratio (4c+2e) / (2a-2c-e) of the relative integral intensities of the corresponding 'H NMR signals of preferred organopolysiloxanes is in the range from 0.10 to 1.00, more preferably in the range from 0.20 to 0.50, and particularly preferably in the range from 0.30 to 0.45.

[0128] The end groups of the organopolysiloxanes are preferably trialkylsiloxy groups, in particular the trimethylsiloxy radical; however, one or more of these alkyl groups may also be replaced by hydroxyl groups or alkoxy groups, such as methoxy or ethoxy radicals.

[0129] In a further preferred embodiment, component C is used in the form of an aqueous dispersion. In this embodiment, the preferred amounts of component C used in the compositions according to the invention relate to the amount of organopolysiloxane introduced into the composition via the aqueous dispersion.

[0130] Component D

[0131] Component D within the meaning of the present invention is at least one polymer containing carboxy and / or dicarboxylic anhydride groups and containing structural units derived from at least one olefin. The olefin polymer is preferably an alpha-olefin polymer and preferably contains structural units derived from at least one compound selected from the group consisting of ethylene, 1-propene, 1-butene, 1-isobutene, 1-pentene, 1-hexene, 1-heptene, 1-octene, 1-nonene, 1-decene, 1-undecene, 1-dodecene, 1-tridecene, 1-tetradecene, 1-octadecene, and 1-nonadecene. The alpha-olefin polymer particularly preferably comprises structural units derived from at least one compound selected from the group consisting of ethylene, 1-propene, and 1-octene.

[0132] In a preferred embodiment, component D has a saponification number, measured according to ISO 3657 (2013 version), of at least 30 mg KOH / g. More preferably, the saponification number is between 30 and 200 mg KOH / g, particularly preferably between 40 and 120 mg KOH / g. When determining the saponification number, both dicarboxylic anhydride groups and carboxyl groups are included. The stated ranges for the saponification number apply regardless of whether component D contains exclusively dicarboxylic anhydride groups, exclusively carboxyl groups, or both of the stated functional groups.

[0133] Carboxy groups can result from partial hydrolysis of dicarboxylic anhydride groups. They can also be introduced by copolymerization or grafting of the alpha-olefin polymer with vinyl monomers containing carboxyl groups, for example, acrylic acid, methacrylic acid, or similar compounds. Furthermore, carboxyl groups can be generated by targeted oxidation of the alpha-olefin polymer. The dicarboxylic anhydride-modified alpha-olefin polymers are preferably polymers containing structural units derived from at least one unsaturated dicarboxylic anhydride, which is preferably selected from at least one representative selected from the group consisting of maleic anhydride, phthalic anhydride, fumaric anhydride, and itaconic anhydride. Maleic anhydride is particularly preferred.

[0134] The anhydride-modified alpha-olefin polymer is preferably rubber-free.

[0135] Preferably, the alpha-olefin polymer (component D) comprises

[0136] Da) 75.0-99.5 wt.%, preferably 90.0-99.0 wt.%, particularly preferably 94.0-98.0 wt.% of structural units derived from at least one compound selected from the group consisting of ethylene, 1-propene, 1-butene, 1-isobutene, 1-pentene, 1-hexene, 1-heptene, 1-octene, 1-nonene, 1-decene, 1-undecene, 1-dodecene, 1-tridecene, 1-tetradecene, 1-octadecene and 1-nonadecene and

[0137] Db) 0.5-25.0 wt.%, preferably 1.0-10.0 wt.%, and particularly preferably 2.0-6.0 wt.% structural units derived from at least one unsaturated dicarboxylic acid anhydride.

[0138] In a preferred embodiment, the olefinic part Da) of the alpha-olefin polymer consists of propylene and / or ethylene. More preferably, the olefinic part Da) of the alpha-olefin polymer consists of propylene.

[0139] The average molecular weight Mw of component D is preferably 3,000 to 40,000 g / mol, more preferably 8,000 to 32,000 g / mol, and particularly preferably 15,000 to 25,000 g / mol. The molecular weight Mw is determined by gel permeation chromatography in ortho-dichlorobenzene at 150 °C with polystyrene calibration.

[0140] The combination of the preferred ranges of the saponification number and the average molecular weights Mw of components D as indicated above is particularly suitable for optimizing in particular the multiaxial impact strength of molded parts produced from the compositions according to the invention.

[0141] Component E

[0142] As component E, one or more polymer additives and / or process aids and / or further polymeric components may be present in the composition, preferably selected from the group consisting of flame retardants, anti-drip agents, flame retardant synergists, smoke inhibitors, lubricants and mold release agents, nucleating agents, antistatic agents, conductivity additives, stabilizers (e.g. hydrolysis, heat aging and UV stabilizers as well as transesterification inhibitors), flow promoters, phase compatibilizers, polymeric blend partners different from components C and D such as rubber-modified graft polymers or rubber-free vinyl (co)polymers, organic fillers and reinforcing materials as well as organic dyes and pigments.

[0143] In a preferred embodiment, component E contains a polymer different from components A, C and D and having reactive groups that can react with OH groups. The reactive groups can be, for example, carboxy, anhydride or epoxy groups. The reactive groups are preferably epoxy groups. More preferably, the polymer is a vinyl (co)polymer, even more preferably a rubber-free vinyl (co)polymer. The vinyl (co)polymer is preferably a methyl methacrylate copolymer or a styrene-acrylonitrile copolymer. Most preferably, a copolymer obtained by polymerizing methyl methacrylate and glycidyl methacrylate or a terpolymer obtained by polymerizing styrene, acrylonitrile and glycidyl methacrylate is used.

[0144] In a preferred embodiment, fatty acid esters, particularly preferably fatty acid esters of pentaerythritol or glycerol, are used as lubricants and mold release agents.

[0145] In a preferred embodiment, at least one member selected from the group consisting of sterically hindered phenols, organic phosphites and sulfur-based co-stabilizers is used as the stabilizer.

[0146] In a particularly preferred embodiment, at least one representative selected from the group consisting of octadecyl 3-(3,5-di-tert-butyl-4-hydroxyphenyl)propionate and tris(2,4-di-tert-butylphenyl)phosphite is used as stabilizer.

[0147] Preparation of the composition

[0148] A composition can be obtained from the inventive components A, B, C, D, and optionally E by physical mixing. All components of the composition can be mixed simultaneously, or partial mixtures can be prepared from certain components of the composition. It is particularly advantageous to prepare a partial mixture of components B and C or partial amounts of components B and / or C.

[0149] Molding compounds with a low mass content of free BPA can be produced from the compositions according to the invention or the partial mixtures forming the compositions according to the invention.

[0150] These molding compounds can be produced, for example, by melt-compounding and melt-extruding the compositions according to the invention or the partial mixtures forming the compositions according to the invention at temperatures of preferably 200°C to 350°C, more preferably 220°C to 330°C, most preferably 260°C to 320°C in conventional units such as single-screw extruders, co-rotating or counter-rotating twin-screw extruders, planetary roller extruders, internal kneaders, or co-kneaders. The residence time of the components in the melt is 15 seconds to 5 minutes. This process is generally referred to as compounding in the context of this invention.

[0151] A molding compound according to the invention is therefore understood to be the product obtained when the compositions according to the invention or the partial mixtures forming the compositions according to the invention are melt compounded and melt extruded. Alternative terms are compound and molding compound.

[0152] The components of the composition according to the invention or the partial mixtures forming the compositions according to the invention can be metered into the compounding unit in a known manner both successively and simultaneously. This means that, for example, some of the components, optionally premixed, can be metered via the main feed of an extruder, and the remaining components, optionally premixed, can be added later in the compounding process via one or more side extruders.

[0153] It is preferred to meter a partial mixture containing the total amount or partial amounts of components B and C via a side extruder into the partial mixture of the remaining, optionally also physically premixed components of the composition according to the invention, which partial mixture has already been melted in an upstream process section of the compounding unit and optionally also contains the remaining partial amounts of components B and / or C.

[0154] In a particular embodiment of the present invention, the molding composition according to the invention is produced by a process comprising the following steps:

[0155] (i) mixing component B or a portion of component B with a portion or the entire amount of component C,

[0156] (ii) optionally conditioning the mixture prepared in step (i) and

[0157] (iii) Melt compounding of the mixture obtained in step (i) or (ii) together with components A, D, and optionally E, as well as with any remaining amounts of components B and / or C if only a portion of component B and / or component C was used in step (i). In a specific embodiment, step (i) is preferably carried out in a container-type intensive mixer. Such mixers are offered, for example, by Mixaco Maschinenbau Dr. Herfeld GmbH & Co. KG (Neuenrade, Germany) or Zeppelin Systems GmbH (Friedrichshafen, Germany), in the latter case often under the name "Henschel mixer."

[0158] In the context of the present invention, conditioning according to step (ii) refers to storage of the mixture obtained in step (i). Storage can take place at room temperature and at elevated temperatures. If storage takes place at room temperature, it is carried out over a period of preferably at least 6 hours, more preferably at least 12 hours, and most preferably at least 24 hours. Storage times can be shortened by increasing the temperature.

[0159] Conditioning is particularly preferred when component C comprises a compound according to formula [V], where m is at least 1 and where R? is at least once a C1- to C5-alkoxy group, preferably a methoxy and / or ethoxy group. This is the case, for example, when component C contains structural units according to formula [Vic].

[0160] In a further preferred embodiment, component C is used in the process according to the invention in the form of an aqueous dispersion.

[0161] Component C, particularly preferably when used as an aqueous dispersion in the process according to the invention, can, in a further preferred embodiment, also be applied to the surface of the inorganic filler by mixing during its preparation, for example and preferably during its wet grinding and / or compaction. In this case, a mixture of the total or partial amounts of components B and C results during the preparation of the inorganic filler. In this respect, step (i) of the process according to the invention described above is, in this embodiment, part of the preparation process for the inorganic filler.

[0162] The compositions can be used to produce molded articles. These can be manufactured, for example, by injection molding, extrusion, and blow molding. Another processing method is the production of molded articles by deep drawing from previously produced sheets or films.

[0163] It is also possible to dose the components directly into the conveyor extruder of an injection molding machine, to produce the composition in the conveyor extruder and to process it directly into molded articles by discharging the composition into an injection mold (compounding or reactive compounding injection molding).

[0164] A further subject matter of the present invention thus relates to the use of a composition or molding compound according to the invention for producing molded articles, and also to a molded article which is obtainable from a composition or molding compound according to the invention or which contains such a composition.

[0165] Examples of such molded bodies are films, profiles, housing parts of all kinds, e.g. for household appliances such as juicers, coffee machines, mixers; for office machines such as monitors, flat screens, notebooks, printers, copiers; panels, pipes, electrical installation ducts, windows, doors and other profiles for the construction sector (interior and exterior applications) as well as electrical and electronic parts such as switches, plugs and sockets and components for commercial vehicles, particularly for the automotive sector.The compositions and molding compounds according to the invention are also suitable for the production of the following molded bodies or molded parts: interior fittings for rail vehicles, ships, aircraft, buses and other motor vehicles, body parts for motor vehicles, housings of electrical devices containing small transformers, housings for information processing and transmission devices, housings and cladding of medical devices, massage devices and housings therefor, toy vehicles for children, flat wall elements, housings for safety devices, heat-insulated transport containers, molded parts for sanitary and bathroom equipment, cover grilles for fan openings and housings for garden tools.

[0166] Further embodiments of the present invention are listed below.

[0167] 1. Composition containing

[0168] A) at least one polycarbonate and / or polyestercarbonate,

[0169] B) at least one inorganic filler,

[0170] C) at least one compound or a mixture of several different compounds of the general structural formula [V] , wherein

[0171] Rs represent identical or different radicals selected from the group consisting of linear or branched alkyl, aryl, alkylaryl or arylalkyl radicals having 1 to 25 carbon atoms and haloalkyl, haloaryl, haloalkylaryl or haloarylalkyl radicals having 1 to 25 carbon atoms,

[0172] R4 represents identical or different alkylene radicals having 1 to 20 C atoms, which may optionally contain ether, ester, urethane or amide groups,

[0173] Rs represent identical or different oxyalkylene radicals of the general formula [Va], where in formula [Va]

[0174] Rsa, Rsa and Rsb independently of one another represent identical or different, optionally branched, optionally heteroatom-substituted alkyl or aryl radicals or hydrogen, k is an integer from 2 to 11, a, b are identical or different integers between 1 and 4, and na and nb are identical or different integers between 0 and 50, where k, na and nb each indicate the number of structural units shown in the respective brackets in the oxyalkylene radical according to the general formula [Va], and where these structural units shown in the brackets can be present both in block form and in a random arrangement in the oxyalkylene radicals of the general formula [Va],

[0175] R„ represents identical or different radicals selected from the group consisting of Rs, -RbSiFRyjs, Rs or H,

[0176] R? represent identical or different alkyl, alkoxy, aryl or aryloxy radicals having 1 to 20 carbon atoms, with the proviso that R? at least one C1- to C5-alkoxy group, and n is an integer from 0 to 20, m is an integer from 0 to 20, o is an integer from 0 to 20 and p is an integer from 1 to 200, where n, m, o and p each indicate the number of structural units shown in the respective brackets in the organopolysiloxane and where these structural units shown in the brackets can be present both in block form and in a random arrangement in the organopolysiloxane, where either m and / or o are > 1 and / or at least one radical Rs in the compound according to formula [V] is a linear or branched alkyl, aryl, alkylaryl or arylalkyl radical having 5 to 25 carbon atoms and where the value of the sum n+m+o+p is > 5,

[0177] D) a polymer containing at least one carboxy group and / or dicarboxylic acid anhydride group and containing structural units derived from at least one olefin.

[0178] 2. Composition according to embodiment 1, characterized in that component A is a polycarbonate and / or polyester carbonate, each containing structural units derived from bisphenol A.

[0179] 3. Composition according to one of embodiments 1 or 2, characterized in that component C is used in an amount of 0.2 to 5 parts by weight, based on a total of 100 parts by weight of components B and C.

[0180] 4. Composition according to one of embodiments 1 or 2, characterized in that component C is used in an amount of 0.7 to 1.5 parts by weight, based on a total of 100 parts by weight of components B and C.

[0181] 5. Composition according to one of the preceding embodiments, characterized in that component D is used in an amount of 1 to 15 parts by weight, based on a total of 100 parts by weight of components B and D.

[0182] 6. Composition according to one of the preceding embodiments, characterized in that component D is used in an amount of 3 to 7 parts by weight, based on a total of 100 parts by weight of components B and D.

[0183] 7. Composition according to one of the preceding embodiments, characterized in that component B is selected from the group consisting of quartz compounds, talc, wollastonite, kaolin, CaCO3, titanium dioxide and other inorganic pigments, Al(OH)3, AlO(OH), Mg(OH)2, micas and glass fibers.

[0184] 8. Composition according to one of the preceding embodiments, characterized in that component B is talc.

[0185] 9. Composition according to one of the preceding embodiments, characterized in that components B and C, each partially or completely, are used in the form of an inorganic filler according to component B coated with component C. . Composition according to one of the preceding embodiments, wherein the value of the sum n+m+o+p is >20. . Composition according to one of the preceding embodiments, characterized in that component C contains structural units according to the formula [VIb] and structural units selected from at least one representative selected from the group of structural units according to the formulas [Via] and [Vic],

[0186] [Via] [VIb] [Vic] wherein the alkyl radical in the structure [Via] contains 5 to 23 carbon atoms. . Composition according to embodiment 11, wherein the organopolysiloxane, apart from the end groups, consists of structural units according to the formulas [Via] and [VIb] in a molar ratio [VIa] / [VIb] of 0.10 to 0.70. . Composition according to embodiment 11, wherein the organopolysiloxane, apart from the end groups, consists of structural units according to the formulas [Via] and [VIb] in a molar ratio [VIa] / [VIb] of 0.25 to 0.45. Composition according to embodiment 11, wherein the organopolysiloxane contains the structural units according to the formulas [Via], [VIb] and [Vic]. Composition according to embodiment 11 or 14, wherein the molar ratio ([VIa]+[VIc]) / [VIb] of the structural units according to the formulas [Via], [VIb] and [Vic] is in the range from 0.10 to 1.00.Composition according to embodiment 11, wherein the organopolysiloxane, apart from the end groups, consists of structural units according to the formulas [VIa], [VIb] and [Vic] in a molar ratio ([VIa] + [VIc]) / [VIb] of 0.30 to 0.45. Composition according to one of the preceding embodiments, characterized in that component D has a saponification number, measured according to ISO 3657 (version of 2013), of at least 30 mg KOH / g. Composition according to one of the preceding embodiments, characterized in that component D has a saponification number, measured according to ISO 3657 (version of 2013), of 30 to 200 mg KOH / g. Composition according to one of the preceding embodiments, wherein component D.

[0187] Da) 90.0-99.0 wt.%, structural units derived from at least one compound selected from the group consisting of ethylene, 1-propene, 1-butene, 1-isobutene, 1-pentene, 1-hexene, 1-heptene, 1-octene, 1-nonene, 1-decene, 1-undecene, 1-dodecene, 1-tridecene, 1-tetradecene, 1-octadecene and 1-nonadecene and

[0188] Db) 1.0-10.0 wt.% structural units derived from at least one unsaturated dicarboxylic acid anhydride. Composition according to embodiment 19, wherein the olefinic part Da of component

[0189] D consists of propylene and / or ethylene. Composition according to one of the preceding embodiments, wherein the average molecular weight Mw of component D is 3,000 to 40,000 g / mol. Composition according to one of the preceding embodiments containing

[0190] 25 to 95 wt.% of component A,

[0191] 1 to 50 wt.% of component B, 0.002 to 2.5 wt.% of component C and 0.01 to 7.5 wt.% of component D.

[0192] 23. Composition according to one of the preceding embodiments containing

[0193] 40 to 75 wt.% of component A,

[0194] 5 to 30 wt.% of component B,

[0195] 0.035 to 0.45 wt.% of component C and 0.15 to 2.1 wt.% of component D.

[0196] 24. Composition according to one of the preceding embodiments, further comprising as component E a non-polymeric Brönsted acid compound and / or a polymer containing epoxy groups other than components A, C and D.

[0197] 25. Composition according to one of the preceding embodiments consisting of components A, B, C, D and E.

[0198] 26. Process for the preparation of a thermoplastic molding compound obtained from a composition containing the following components:

[0199] A) at least one polymer selected from the group consisting of polycarbonate and / or polyester carbonate,

[0200] B) at least one inorganic filler,

[0201] C) at least one organopolysiloxane containing at least one structural unit according to the general formula wherein R1 and R2 independently of one another represent hydrogen or hydrocarbon radicals, which may each be substituted or unsubstituted and optionally interrupted by heteroatoms such as O, N or Si and may be linear, branched or cyclic, wherein the organopolysiloxane contains at least one structural unit according to the general formula (IV), in which at least one of the radicals R1 or R2 is other than hydrogen and methyl, and wherein the organopolysiloxane is free of siloxane structural units in which two hydrogen atoms are bonded to the same silicon atom, D) a polymer containing at least one carboxy- and / or dicarboxylic anhydride groups and containing structural units derived from at least one olefin, comprising the following steps:

[0202] (i) mixing component B or a portion of component B with a portion or the entire amount of component C,

[0203] (ii) preferential conditioning of the mixture prepared in step (i) and

[0204] (iii) melt compounding the mixture obtained in step (i) or (ii) together with components A, D, optionally one or more polymer additives, process aids and / or further polymeric components as component E and with the remaining amounts of components B and / or C if only partial amounts of components B and / or C were used in step (i).

[0205] 27. The process according to embodiment 26, wherein process step (ii) is carried out and in this process step the organopolysiloxane according to component C is partially or completely reacted with the inorganic filler according to component B and the organopolysiloxane according to component C is partially or completely covalently bonded to the surface of the inorganic filler according to component B.

[0206] 28. Process according to embodiment 26 or 27, wherein in step (i) component C is used in the form of an aqueous dispersion.

[0207] 29. The process according to any one of embodiments 26 to 28, wherein component C or a subset of component C is blended with this inorganic filler according to component B or a subset thereof during the preparation of the inorganic filler according to component B.

[0208] 30. Process according to embodiment 29, wherein component C or a subset of component C is mixed with this inorganic filler according to component B or a subset thereof during the wet grinding and / or compacting of the inorganic filler according to component B.

[0209] 31. The process according to any of embodiments 26 to 29, wherein a compound of formula [V] is used as component C. 32. A thermoplastic molding composition produced in a process according to any of embodiments 26 to 31 and / or obtained from a composition according to any of embodiments 1 to 25.

[0210] 33. Use of a combination of at least one organopolysiloxane containing at least one structural unit according to the general formula wherein Ri and R2 independently of one another represent hydrogen or hydrocarbon radicals, which may each be substituted or unsubstituted and optionally interrupted by heteroatoms such as O, N or Si and may be linear, branched or cyclic, wherein the organopolysiloxane contains at least one structural unit according to the general formula (IV), in which at least one of the radicals Ri or R2 is other than hydrogen and methyl, and wherein the organopolysiloxane is free of siloxane structural units in which two hydrogen atoms are bonded to the same silicon atom, and at least one carboxy- and / or dicarboxylic anhydride-containing group,A polymer containing structural units derived from at least one olefin for reducing the content of free bisphenol A in molding compositions produced by melt compounding and / or moldings produced by thermal molding, each containing polycarbonate and / or polyester carbonate and inorganic filler, wherein the polycarbonate and / or polyester carbonate each contains structural units derived from bisphenol A.

[0211] 34. Use according to embodiment 33, wherein the polymer containing carboxy and / or dicarboxylic anhydride groups and containing structural units derived from at least one olefin is an anhydride-modified alpha-olefin polymer having a saponification number, measured according to ISO 3657 (2013 version), of at least 30 mg KOH / g.

[0212] 35. Use according to one of embodiments 33 or 34, wherein a compound according to formula [V] is used as component C. 36. Shaped articles comprising a composition according to one of embodiments 1 to 25 or a thermoplastic molding compound according to embodiment 32.

[0213] Component Al:

[0214] Linear polycarbonate based on bisphenol A, produced by interfacial polymerization, with a weight-average molecular weight M w of 25,000 g / mol (determined at room temperature by GPC in methylene chloride against a BPA-PC standard).

[0215] Component A-2:

[0216] Linear polycarbonate based on bisphenol A, produced by interfacial polymerization, with a weight-average molecular weight M w of 28,000 g / mol (determined at room temperature by GPC in methylene chloride against a BPA-PC standard).

[0217] Component A-3 :

[0218] Linear polycarbonate based on bisphenol A, produced by interfacial polymerization, with a weight-average molecular weight M w of 32,000 g / mol (determined at room temperature by GPC in methylene chloride against a BPA-PC standard).

[0219] Component Bl:

[0220] Luzenac™ A7C (Imerys Performance Additives, Toulouse, France): Compacted talc with an iron oxide content of 0.2 wt.%, an aluminum oxide content of 0.3 wt.%, and a calcium oxide content of 0.4 wt.%. The d50 measured by sedimentation analysis according to ISO 13317-3 (version 2001-03) is 2.2 pm; the d^ measured by sedimentation analysis according to ISO 13317-3 (version 2001-03) is 7 pm. This talc does not contain sizing according to component C.

[0221] Component B-2:

[0222] Luzenac™ R7C (Imerys Performance Additives, Toulouse, France): Compacted talc with an iron oxide content of 0.2 wt.%, an aluminum oxide content of 0.3 wt.%, and a calcium oxide content of 0.4 wt.%. The d50 measured by sedimentation analysis according to ISO 13317-3 (version 2001-03) is 2.2 pm; the d^ measured by sedimentation analysis according to ISO 13317-3 (version 2001-03) is 7 pm. Component B-2 contains an organopolysiloxane corresponding to component C, which was applied to the talc surface during formulation by blending talc and organopolysiloxane. The organopolysiloxane according to component C is present in component B-2 at a concentration of 1.0 wt.%. Structurally, the organopolysiloxane contained in component B-2 corresponds to component Cl according to 'H-NMR spectroscopy.For the structural characterization and quantification of the organopolysiloxane in component B-2, component B-2 was subjected to ASE extraction in chloroform. The ASE extract was separated, the chloroform was distilled off, and the distillation residue was dissolved in deuterated chloroform with a precisely weighed amount of dimethyl terephthalate as a quantitative internal standard and analyzed by 'H NMR spectroscopy. The position and relative intensity of all observed 'H NMR signals corresponded to the corresponding values ​​observed for component C1. The aforementioned content of component C in component B-2 was calculated from the ratio of the integrated intensity of the 'H NMR signals attributable to the organopolysiloxane to the integrated intensity of the 'H NMR signals of the dimethyl terephthalate standard, assuming that component C in component B-2 is structurally compound C-1.

[0223] Component B-3:

[0224] Jetfine™ 3CA (Imerys Performance Additives, Toulouse, France): Compacted talc with an iron oxide content of 0.2 wt.%, an aluminum oxide content of 0.4 wt.%, and a calcium oxide content of 0.3 wt.%. The d50 measured by sedimentation analysis according to ISO 13317-3 (version 2001-03) is 1.1 pm; the d^ measured by sedimentation analysis according to ISO 13317-3 (version 2001-03) is 3.5 pm. This talc does not contain sizing according to component C.

[0225] Component Cl

[0226] Tegopren™ 6875 (Evonik Nutrition & Care GmbH, Essen, Germany):

[0227] Organopolysiloxane containing structural units according to formulas [Via] and [VIb] in the polymer backbone.

[0228] Results of the 'H NMR spectroscopic characterization (in deuterated chloroform at room temperature) of the components Cl: a) 0.01 - 0.15 ppm (3H, CH, bound to Si), relative integral intensity: a=20.82 b) 0.50 ppm (2H, CH2 bound to Si), relative integral intensity: b=2.00 c) 0.88 ppm (3H, terminal CH3 in the alkyl radical), relative integral intensity: c=3.41 d) 1.26 ppm (2H, CH2 in aliphatic chain), relative integral intensity: d=29.80

[0229] From the values ​​a and c of the relative integral intensities of the 'H-NMR signals a) and c), according to the formula [VIa] / [VIb] = 2c / (ac), a molar ratio of the structural units according to the formulas [Via] and [VIb] of 0.39 results for component Cl. From the ratio of the 'H-NMR signals c) and d), it follows for component Cl that the alkyl radical in the structural unit according to formula [Via] is composed of an average of 14 carbon atoms.

[0230] Component C-2

[0231] Tegopren™ 6879 (Evonik Nutrition & Care GmbH, Essen, Germany):

[0232] Organopolysiloxane containing structural units according to formulas [Via], [VIb] and [Vic] in the polymer backbone.

[0233] Results of the 'H NMR spectroscopic characterization (in deuterated chloroform at room temperature) of components C-2: a) 0.01 - 0.20 ppm (3H, CH, bound to Si), relative integral intensity: a=47.35 b) 0.44-0.65 ppm (CH2 bound to Si), relative integral intensity: b=6.02 c) 0.88 ppm (3H, terminal CH3 in the alkyl radical), relative integral intensity: c=3.93 d) 1.16-1.42 ppm (CH2 in aliphatic chain & CH3 in ethoxy group), relative integral intensity: d=43.25 e) 3.81 ppm (6H, CH2 in ethoxy group), relative integral intensity: e=6.00

[0234] From the values ​​a and e of the relative integral intensities of the 'H NMR signals a) and e), according to the formula [VIa] / [VIc] = 2c / e, a molar ratio of the structural units according to formulas [Via] and [Vic] of 1.31 results for component C-2.

[0235] From the values ​​a, c and e of the relative integral intensities of the 'H NMR signals a), c) and e), according to the formula ([VIa]+[VIc]) / [VIb] = (4c+2e) / (2a-2c-e) for component C-2, a molar ratio ([VIa]+[VIc]) / [VIb] of the structural units according to formulas [Via], [VIb] and [Vic] of 0.34 results.

[0236] Component C-3

[0237] DOWSIL™ FCA-107 Flake (The Dow Chemical Company, Midland MI (United States) Hydroxy-terminated phenylsilsesquioxane

[0238] Component D

[0239] AC™ 907P (Honeywell Corp., Morristown NJ, USA): Maleic anhydride-grafted polypropylene (CAS No. 25722-45-6) with a saponification number, measured according to ISO 3657 (2013 version), of 87 mg KOH / g and a melt viscosity measured at 190°C using a Brookfield rotational viscometer of 350 cP. The weight-average molecular weight M w , determined by gel permeation chromatography in ortho-dichlorobenzene at 150°C with polystyrene calibration, is 20,700 g / mol. Component El:

[0240] Fabutit™ 289: ortho-phosphoric acid absorbed on silica gel (Chemische Fabrik Budenheim KG, Budenheim, Germany).

[0241] Component E-2:

[0242] Fine-Blend™ SAG 008 (Fine-Blend Polymer (Shanghai) Co., LTD, Shanghai, China): Random terpolymer produced by free-radical polymerization of glycidyl methacrylate, styrene, and acrylonitrile with a glycidyl methacrylate content of 8 wt.%. The epoxy content of component E-2, measured according to ASTM D 1652-11 in dichloromethane, is 2.4 wt.%.

[0243] Component E-3:

[0244] Mixture of (i) a styrene-acrylonitrile copolymer having an acrylonitrile content of 23 wt.% and having a weight-average molecular weight M wof 100,000 Da, measured by GPC at room temperature in tetrahydrofuran with polystyrene as standard, (ii) an ABS polymer produced by bulk polymerization with an A:B:S weight ratio of 24% : 10% : 66% and with a gel content, measured as the portion insoluble in acetone at room temperature, of 19 wt.%, wherein the acetone-soluble sol portion of the ABS polymer produced by bulk polymerization has a weight-average molecular weight M wof 125,000 Da, measured by GPC at room temperature in tetrahydrofuran with polystyrene as standard, and (iii) a graft polymer with a core-shell structure produced by emulsion polymerization consisting of 75 wt.% of a silicone-acrylate composite rubber as the core and 25 wt.% of a polymethyl methacrylate shell and with a gel content, measured as the portion insoluble in acetone at room temperature, of 90 wt.%. Component E-3, as a mixture of the three components (i), (ii), and (iii), has a gel content, measured as the portion insoluble in acetone at room temperature, of 23 wt.%. This gel content of component E-3 is attributable to 22 wt.% of the bulk ABS component (ii) and 78 wt.% to the graft polymer with a core-shell structure (iii). The proportion of component (i) is 53 wt.%, based on component E-3.

[0245] Component E-4:

[0246] Irganox™ B900 (BASF AG, Ludwigshafen, Germany): Stabilizer

[0247] (Mixture of 80% Irgafos™ 168 (tris(2,4-di-tert-butylphenyl) phosphite) and 20% Irganox™ 1076 (2,6-di-tert-butyl-4-(octadecanoxycarbonylethyl)phenol) (Manufacturer: BASF AG)

[0248] Component E-5:

[0249] Pentaerythritol tetrastearate (mold release agent)

[0250] Component E-6:

[0251] Black Pearls™ 800 (Cabot Corp., Belgium): Carbon black pigment preparation of the compositions

[0252] Components A to E of the respective compositions were processed into a molding compound in a single compounding step according to the weight proportions shown in Tables 1 to 4 in a ZSK26 MC 18 twin-screw extruder (Coperion GmbH, Stuttgart, Germany) (in the case of the examples in Tables 1, 2, and 4) or in a Process 11 twin-screw laboratory extruder (Thermo Fisher Scientific Inc., Waltham, MA, USA) (in the case of the examples in Table 3). A melt temperature of 290°C was used for the examples in Tables 1, 3, and 4, and a melt temperature of 280°C was used for the examples in Table 2. In all cases, a degassing vacuum of 70 mbar (absolute) was applied in an extruder zone near the extruder exit nozzle.

[0253] In the case of the examples in Tables 1, 2, and 4, all components of the composition, with the exception of the talc, were metered together via the main feed into the extruder inlet and melted and dispersed by applying thermal and mechanical energy. The talc was metered into the melt mixture of the remaining components via a side extruder, i.e., into an extruder zone located beyond the melting zone as viewed from the main feed. The residence time of the components in the melt during this process in the examples shown in Tables 1 and 2 was approximately 30 seconds.

[0254] In the examples shown in Table 3, premixes of the total amounts of components B and C were first prepared in the ratios shown in Table 3. The powdered mixtures containing components B and C were produced using a Mixaco LAB CM 1.5 laboratory container mixer (MIXACO Dr. Herfeld GmbH & Co KG, Neuenrade, Germany). For this purpose, the talc according to component B was placed in the mixing container, filling the mixing container approximately halfway, and the liquid organopolysiloxane according to component C was then injected into the talc powder atmosphere stirred up by the mixing tool using a syringe over a period of approximately 30 seconds, via a bore with an integrated cannula in the lid of the mixing container, while the mixing tool was in operation. This mixture was then distributed largely homogeneously over the surface of the mixing container.The resulting premixes of components B and C were either used immediately in the compounding process or equilibrated in the laboratory atmosphere for 24 hours (conditioning). To produce the molding compounds from the compositions shown in Table 3, the resulting premixes of components B and C were premixed with component A, which was used as granules ground to powder, and, if required, component D, in the proportions listed in Table 3. The resulting composition was fed into the compounding process via the main feed of the laboratory extruder. The residence time of the components in the melt during this process for the examples shown in Table 3 was approximately 90 seconds.

[0255] Production of molded bodies and testing

[0256] From the compositions, molded bodies measuring 60 mm x 40 mm x 2 mm were produced at melt temperatures of 280 °C and a mold temperature of 80 °C on an Arburg 270 E injection molding machine with an injection speed of 40 mm / s.

[0257] To determine the content of free bisphenol A (abbreviated as [BPA]), samples of the produced granules and the molded articles produced from the granules were dissolved in dichloromethane and reprecipitated with acetone. The precipitated polymer fraction was filtered off, and the filtrate was analyzed by high-pressure liquid chromatography with a UV detector (HPLC-UV) with an external standard. A C18 phase was used as the column material, and water and methanol in a gradient were used as the eluent.

[0258] Table 1:

[0259] Compositions and their properties

[0260] The data in Table 1 show that the molding compositions according to the invention obtained by melt compounding from the compositions according to the invention containing components C and D (Examples 5, 6 and 7, C as a coating on the surface of the talc) have, as desired, a very low proportion of free bisphenol A in the granules. In Comparative Example VI containing talc without coating, a significantly higher content of free bisphenol A is obtained. By adding component D alone, the proportion of free bisphenol A is increased even more disadvantageously (V2). If only a Brönsted acid is added (V4), as described in the prior art for stabilization against molecular weight degradation, the results are particularly poor with regard to the objectives pursued within the scope of the present invention, i.e. the BPA contents are at their highest. If a talc with a coating is used (V3, i.e.Component C is present on the surface of the talc), the proportions of free bisphenol A in the granules are significantly lower than in the other comparative examples VI, V2 and V4, but not yet at a very low level.

[0261] Table 2:

[0262] Compositions and their properties

[0263] The data in Table 2 show that even in molding compounds produced by melt compounding from compositions containing polymeric blend partners, the use of the inventive combination of component B-2 (containing component C) and D according to Example 10 results in a significantly reduced proportion of free bisphenol A in the granules compared to comparable compositions without component C (V8 and V9). While the addition of component D leads to a reduction in the bisphenol A content, the additional use of component D leads to a significantly better prevention of free bisphenol A. This is also evident in test specimens produced from the granules. Table 3:

[0264] Compositions and their properties

[0265] The data from Table 3 show that a significant reduction in the proportion of free bisphenol A can also be achieved when the molding compounds are produced in the process according to the invention using a premix of components B and C according to process step (i). The use of component C-2 (Example 14) still shows advantages over the use of component C-1 (Example 13). Furthermore, it is advantageous to condition the premix of components B and C before compounding with the other components (Example 15).

[0266] Table 4:

[0267] Compositions and their properties The data in Table 4 show that a significant reduction in the proportion of free bisphenol A can only be achieved if an organopolysiloxane according to the invention is used as component C. If a phenylsilsesquioxane described in the prior art is used instead as component C, the inventive effect is not achieved.

Claims

Patent claims 1. Composition containing A) at least one polycarbonate and / or polyestercarbonate, B) at least one inorganic filler, C) at least one compound or a mixture of several different compounds of the general structural formula [V] , wherein Rs represent identical or different radicals selected from the group consisting of linear or branched alkyl, aryl, alkylaryl or arylalkyl radicals having 1 to 25 carbon atoms and haloalkyl, haloaryl, haloalkylaryl or haloarylalkyl radicals having 1 to 25 carbon atoms, R4 represent identical or different alkylene radicals having 1 to 20 C atoms, which may optionally contain ether, ester, urethane or amide groups, Rs represent identical or different oxyalkylene radicals of the general formula [Va], where in formula [Va] Rsa, Rsa and Rsb independently of one another represent identical or different, optionally branched, optionally heteroatom-bearing alkyl or aryl radicals or hydrogen, k is an integer from 2 to 11, a, b are identical or different integers between 1 and 4 and na and nb are identical or different integers between 0 and 50, where k, na and nb each indicate the number of structural units shown in the respective brackets in the oxyalkylene radical according to the general formula [Va] and where these are shown in the brackets represented structural units can be present both in block form and in a statistical arrangement in the oxyalkylene radicals of the general formula [Va], R„ represents identical or different radicals selected from the group consisting of Rs, -RjSifR?)^ Rs or H, R? represent identical or different alkyl, alkoxy, aryl or aryloxy radicals having 1 to 20 carbon atoms, with the proviso that R? at least one C1- to C5-alkoxy group, and n is an integer from 0 to 20, m is an integer from 0 to 20, o is an integer from 0 to 20 and p is an integer from 1 to 200, where n, m, o and p each indicate the number of structural units shown in the respective brackets in the organopolysiloxane and where these structural units shown in the brackets can be present both in block form and in a random arrangement in the organopolysiloxane, where either m and / or o are > 1 and / or at least one radical Rs in the compound according to formula [V] is a linear or branched alkyl, aryl, alkylaryl or arylalkyl radical having 5 to 25 carbon atoms and where the value of the sum n+m+o+p is > 5, D) a polymer containing at least one carboxy group and / or dicarboxylic acid anhydride group and containing structural units derived from at least one olefin.

2. Composition according to claim 1, characterized in that component A is a polycarbonate and / or polyester carbonate, each containing structural units derived from bisphenol A.

3. Composition according to one of claims 1 or 2, characterized in that component C is used in an amount of 0.2 to 5 parts by weight, based on a total of 100 parts by weight of components B and C.

4. Composition according to one of the preceding claims, characterized in that component D is used in an amount of 1 to 15 parts by weight, based on a total of 100 parts by weight of components B and D.

5. Composition according to one of the preceding claims, characterized in that component B is talc.

6. Composition according to one of the preceding claims, characterized in that components B and C are used in the form of an inorganic filler according to component B sized with component C.

7. Composition according to one of the preceding claims, characterized in that component C contains structural units according to the formula [VIb] and structural units selected from at least one representative selected from the group of structural units according to the formulas [Via] and [Vic], [Via] [VIb] [Vic] wherein the alkyl radical in the formula [Via] contains 5 to 23 carbon atoms.

8. Composition according to claim 7, characterized in that the molar ratio ([VIa]+[VIc]) / [VIb] of the structural units according to the formulas [Via], [VIb] and [Vic] is in the range from 0.10 to 1.

00.

9. Composition according to one of the preceding claims, characterized in that Component D has a saponification number, measured according to ISO 3657 in the 2013 version, of at least 30 mg KOH / g.

10. Composition according to one of the preceding claims, characterized in that component D Da) 90.0-99.0 wt.%, structural units derived from at least one compound selected from the group consisting of ethylene, 1-propene, 1-butene, 1-isobutene, 1-pentene, 1-hexene, 1-heptene, 1-octene, 1-nonene, 1-decene, 1-undecene, 1-dodecene, 1-tridecene, 1-tetradecene, 1-octadecene and 1-nonadecene and Db) 1.0-10.0 wt.% structural units derived from at least one unsaturated dicarboxylic acid anhydride.

11. Composition according to one of the preceding claims containing 20 to 95 wt.% of component A, 1 to 50 wt.% of component B, 0.002 to 2.5 wt.% of component C and 0.01 to 7.5 wt.% of component D.

12. Process for the preparation of a thermoplastic molding compound obtained from a composition containing the following components: A) at least one polymer selected from the group consisting of polycarbonate and / or polyester carbonate, B) at least one inorganic filler, C) at least one organopolysiloxane containing at least one structural unit according to the general formula wherein Ri and R2 independently of one another represent hydrogen or hydrocarbon radicals, each of which may be substituted or unsubstituted and optionally interrupted by heteroatoms such as O, N or Si and may be linear, branched or cyclic, wherein the organopolysiloxane contains at least one structural unit according to the general formula (IV), in which at least one of the radicals Ri or R2 is other than hydrogen and methyl, and wherein the organopolysiloxane is free of siloxane structural units in which two hydrogen atoms are bonded to the same silicon atom, and D) a polymer containing at least one carboxy and / or dicarboxylic acid anhydride group and containing structural units derived from at least one olefin, comprising the following steps: (i) mixing component B or a portion of component B with a portion or the entire amount of component C, (ii) preferential conditioning of the mixture prepared in step (i) and (iii) melt compounding the mixture obtained in step (i) or (ii) together with components A, D, optionally one or more polymer additives, process aids and / or further polymeric components as component E and with the remaining amounts of components B and / or C if only partial amounts of components B and / or C were used in step (i).

13. Thermoplastic molding composition produced in a process according to claim 12 and / or obtained from a composition according to any one of claims 1 to 11.

14. Use of a combination of at least one organopolysiloxane containing at least one structural unit according to the general formula wherein Ri and R2 independently of one another represent hydrogen or hydrocarbon radicals, each of which may be substituted or unsubstituted and optionally interrupted by heteroatoms such as O, N or Si and may be linear, branched or cyclic, wherein the organopolysiloxane contains at least one structural unit according to the general formula (IV) in which at least one of the radicals Ri or R2 is other than hydrogen and methyl, and wherein the organopolysiloxane is free of siloxane structural units in which two hydrogen atoms are bonded to the same silicon atom, and at least one polymer containing structural units derived from at least one olefin and containing carboxy- and / or dicarboxylic anhydride groups for reducing the free bisphenol A content of molding compositions produced by melt compounding and / or molded articles produced by thermal molding, each containing polycarbonate and / or polyester carbonate and inorganic filler, wherein the polycarbonate and / or polyester carbonate each contains structural units derived from bisphenol A.

15. A molded article comprising a composition according to any one of claims 1 to 11 or a thermoplastic molding composition according to claim 13.

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