Composition containing a polycarbonate, polyester carbonate, and / or polyester as well as an olefin-(METH) acrylate copolymer having a special molar mass distribution

Abstract

The invention relates to a composition containing A) a polymer selected from the group consisting of polycarbonates, polyesters, and polyester carbonates, and B) a copolymer containing structural units derived from an olefin and containing structural units derived from a (meth)acrylic acid alkyl ester, the number-average molecular weight Mn of component B being at least 25 kg / mol and the weight-average molecular weight Mw of component B being at most 250 kg / mol, and the composition being free of polymers containing structural units derived from butadien. The invention also relates to a method for producing a thermoplastic molding compound from the composition, to a thermoplastic molding compound produced from the composition or produced using the method according to the invention, and to molded bodies containing the composition or obtained from the molding compound.and the composition being free of polymers containing structural units derived from butadien. The invention also relates to a method for producing a thermoplastic molding compound from the composition, to a thermoplastic molding compound produced from the composition or produced using the method according to the invention, and to molded bodies containing the composition or obtained from the molding compound.

Description

[0001] 2024PF30072-Abroad

[0002] - 1 -

[0003] Composition containing polycarbonate, polyester carbonate and / or polyester, as well as an olefin-methionine acrylate copolymer with a special molecular weight distribution.

[0004] The present invention relates to a polycarbonate, polyester carbonate and / or polyester composition containing an olefin copolymer with a particular molar mass distribution, a method for producing a thermoplastic molding compound from the composition, the molding compound itself produced in such a method and molded bodies containing the composition or obtained from the molding compound.

[0005] Molding compounds containing polycarbonates, polyester carbonate, and / or polyester have been known for many years. These compounds are used to produce molded parts for a wide variety of applications, for example, in the automotive, construction, and electronics sectors.

[0006] Polymer blends can be produced by mixing polycarbonates, polyester carbonates, and / or polyesters with other polymeric components and additives in the melt (compounding). The properties of such polymer blend molding compounds and the resulting molded parts can be varied over a wide range and adapted to the requirements of the respective application by appropriately selecting their composition and manufacturing conditions.

[0007] An interesting group of potential blending partners is the group of polyolefins. Due to the semi-crystalline nature and low glass transition temperatures of these polymers, improvements in rheological and mechanical properties as well as resistance to chemical attack can be achieved.

[0008] In practice, however, the use of polyolefins as blending partners for polycarbonates, polyester carbonates, and polyesters is limited. It has been shown that polyolefins must be used in certain minimum quantities to realize the aforementioned advantages. However, polyolefins are not miscible with polycarbonate in these quantities, even by dispersion in the melt.

[0009] Due to this often-present partial or incompatibility, separate phases form in polycarbonate, polyester carbonate, or polyester blends. Depending on the proportions of the respective polymer components, polycarbonate, polyester carbonate, or polyester, for example, forms a matrix phase in which the olefin polymer is present in the form of more or less finely dispersed, microscopically visible polymeric phases. (2024PF30072-Ausland)

[0010] - 2 -

[0011] Phase interfaces then become weak points with regard to mechanical properties, and material delamination can also occur. As a result, the desired improvements in properties, especially mechanical properties, are not achieved.

[0012] Improved compatibility is achieved with copolymers through the copolymerization of olefins with more polar monomers, such as acrylic acid and methacrylic acid or their corresponding esters (acrylates and methacrylates), which are more miscible with polycarbonate, polyester carbonate, or polyester. Such copolymers are already described in the prior art as blending partners for polycarbonates.

[0013] US 2021 / 0163739 discloses a copolymer of ethylene and acrylate(s) with a melt flow index (MFI) of greater than or equal to 50 g / 10 minutes, obtained by radical copolymerization under high pressure in a tubular reactor, and methods for its use. Also disclosed is a thermoplastic composition, intended in particular for extrusion or injection molding, containing one or more such copolymers of ethylene and acrylate(s) in a content ranging from 0.1 to 20 wt.%, and one or more thermoplastic polymers such as polycarbonate.

[0014] EP 0216267 discloses thermoplastic compositions suitable for the production of molded bodies, based on mixtures of an aromatic polycarbonate and a copolymer of ethylene and acrylic or methacrylic acid. It is described that articles produced from these compositions are more resistant to delamination than corresponding compositions based on mixtures of polycarbonate and polyethylene.

[0015] EP 0119531 A2 discloses thermoplastic compositions containing an aromatic polycarbonate, an olefinic polymer or copolymer, and a third component, which is a copolymer of an olefin and an acrylate, methacrylate, acrylic acid, or methacrylic acid. The third component improves impact strength and weld line strength.

[0016] EP 0271701 A2 discloses a composition containing at least one high molecular weight aromatic polycarbonate and an impact-modifying, gasoline solvent-resistant amount of an ethylene alkyl acrylate, wherein the ethylene constitutes approximately 55 to 75% by weight and the alkyl acrylate approximately 25 to 45% by weight, based on the ethylene alkyl acrylate polymer. 2024PF30072-Abroad

[0017] - 3 -

[0018] The aforementioned advantages of polymer blends made from polycarbonates, polyester carbonates, and / or polyesters with polyolefins or polyolefin-containing copolymers are of interest for many applications, such as in the automotive sector. When manufacturing large-area components, for example, for panoramic roof structures, it is further advantageous if the thermoplastic composition or the resulting molding compounds exhibit low shrinkage behavior. This simplifies the design of the equipment used for component production and the process parameters, thus making it easier to obtain components with the required dimensions. Additionally, minimal anisotropy of the material shrinkage—that is, a small difference between transverse and longitudinal shrinkage relative to the injection molding direction—is desirable to minimize warpage in the component.In the following, material shrinkage will also be referred to simply as shrinkage.

[0019] The aforementioned large-area components are used outdoors and are therefore exposed to UV radiation. It is known to those skilled in the art that some polymers yellow and / or become brittle under UV exposure and are therefore less suitable for the application in question. This applies in particular to butadiene-containing polymers, which are otherwise a commonly used blending partner for polycarbonate to improve toughness.

[0020] However, the aforementioned state of the art does not reveal how an overall advantageous property profile for large-area components can be achieved with regard to the aforementioned mechanical properties while simultaneously avoiding components that are particularly prone to yellowing / embrittlement under UV influence.

[0021] It was therefore desirable to provide a composition for the production of a thermoplastic molding compound, wherein the molding compound, when processed into molded parts, is characterized by low and minimally anisotropic shrinkage, and the manufactured molded parts exhibit improved mechanical properties, in particular an improvement in low-temperature ductility as measured by the maximum energy absorption in the multiaxial puncture test at preferably -30°C. Furthermore, it was desirable that the composition be free of polymers containing structural building blocks derived from butadiene.

[0022] Surprisingly, it was found that a composition containing

[0023] A) a polymer selected from the group consisting of polycarbonates, polyesters and polyester carbonates, 2024PF30072-Abroad

[0024] - 4 -

[0025] B) a copolymer containing structural units derived from an olefin and containing structural units derived from a (meth)acrylic acid alkyl ester, characterized in that the number-averaged molecular weight M n component B is at least 25 kg / mol and the weight-averaged molecular weight M w the mass of component B is at most 250 kg / mol, and wherein the composition is free of polymers containing structural units derived from butadiene, which solves the problem according to the invention.

[0026] The term "a polymer" in the context of component A also includes mixtures of the aforementioned polymers polycarbonate, polyester carbonate, and polyester, and / or mixtures of structurally different polycarbonates, polyester carbonates, or polyesters. "A polymer" is therefore to be understood as "at least one polymer." This applies analogously to the other components B and C contained in the composition according to the invention and their monomer Z structural units.

[0027] In a preferred embodiment, the composition contains

[0028] 50 to 99.5 parts by weight, more preferably 60 to 99 parts by weight, particularly preferably 70 to 98.5 parts by weight, each based on a total of 100 parts by weight of components A and B, of component A,

[0029] 0.5 to 50 parts by weight, more preferably 1 to 40 parts by weight, particularly preferably 1.5 to 30 parts by weight, each based on a total of 100 parts by weight of components A and B, of component B.

[0030] Optionally, the composition contains as component C polymer additives and / or other polymeric components different from A and B, preferably in an amount of 0 to 35 parts by weight, more preferably 0 to 20 parts by weight, most preferably 0 to 5 parts by weight, each based on a total of 100 parts by weight of components A and B.

[0031] It is preferred to combine the first-mentioned areas, more preferably the second-mentioned areas, and most preferably the third-mentioned areas of the quantities of components A to C. 2024PF30072-Abroad

[0032] - 5 -

[0033] Compositions consisting of at least 98 wt.%, and more preferably at least 99 wt.%, of components A to C are preferred. Compositions consisting of components A to C are particularly preferred.

[0034] Component A

[0035] Component A is a polymer selected from the group consisting of polycarbonates, polyester carbonates and polyesters, preferably selected from the group consisting of polycarbonates and polyester carbonates, particularly preferably selected from the group consisting of polycarbonates.

[0036] Suitable polycarbonates and / or polyester carbonates according to component A are known from the literature or can be produced using methods known from the literature (for the production of polycarbonates, see, for example, Schnell, "Chemistry and Physics of Polycarbonates", Interscience Publishers, 1964, as well as DE-AS 1 495 626, DE-A 2 232 877, DE-A 2 703 376, DE-A

[0037] 2 714 544, DE-A 3 000 610, DE-A 3 832 396; for the production of polyester carbonates, e.g. DE-A

[0038] 3 007 934).

[0039] The production of polycarbonates suitable as component A according to the invention is carried out, for example, by reacting dihydroxyaryl compounds (also referred to as aromatic diols, diphenols, or bisphenols) and / or aliphatic diols with carbonic acid halides, preferably phosgene, and / or with aromatic dicarboxylic acid dihalides, preferably benzene dicarboxylic acid dihalides, using the interface process, optionally with the use of chain terminators, for example, monophenols, and optionally with the use of trifunctional or more than trifunctional branchers, for example, trihydroxyaryl or tetrahydroxyaryl compounds. Likewise, production via a melt polymerization process by reacting dihydroxyaryl compounds and / or aliphatic diols with carbonic acid stems, for example, diphenyl carbonate, is possible.

[0040] For the production of the polycarbonates suitable as component A according to the invention and / or for the production of the polyester carbonates suitable as component A according to the invention, dihydroxyaryl compounds suitable are preferably those of structure (1)

[0041] (1) where 2024PF30072-overseas

[0042] - 6 -

[0043] A a single bond, Ci to Cs-alkylene, C2 to Cs-alkylidene, Cs to Ce-cycloalkylidene, -O- , -SO- , -CO- , -S- , -SO2- , Ce to Cn-arylene, to which further aromatic rings, optionally containing heteroatoms, may be fused, or a residue of structure (2) or (3)

[0044] B each Ci to Cn-alkyl, preferably methyl, halogen, preferably chlorine and / or bromine x each independently 0, 1 or 2, p 1 or 0 are, and

[0045] R 5 and R 6 for each X 1individually selectable, independently of each other hydrogen or Ci to Ce- alkyl, preferably hydrogen, methyl or ethyl, XI carbon and m 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.

[0046] Preferred dihydroxyaryl compounds used are hydroquinone, resorcinol, dihydroxydiphenyls, bis-(hydroxyphenyl)alkanes, bis-(hydroxyphenyl)cycloalkanes, bis-(hydroxyphenyl)sulfides, bis-(hydroxyphenyl)ethers, bis-(hydroxyphenyl)ketones, bis-(hydroxyphenyl)sulfones, bis-(hydroxyphenyl)sulfoxides, α-α'-bis-(hydroxyphenyl)diisopropylbenzenes, phthalimidines derived from isatin or phenolphthalein derivatives, and their kemalkylated, kemarylated, and kemhalogenated compounds.

[0047] Other preferred dihydroxyaryl compounds used are 4,4'-dihydroxydiphenyl, bisphenol A, 2,4-bis-(4-hydroxyphenyl)-2-methylbutane, 1,1-bis-(4-hydroxyphenyl)-p-diisopropylbenzene, 2,2-bis-(3-methyl-4-hydroxyphenyl)propane, dimethyl bisphenol A, bis-(3,5-dimethyl-4-hydroxyphenyl)methane, 2,2-bis-(3,5-dimethyl-4-hydroxyphenyl)propane, bis-(3,5-dimethyl-4-hydroxyphenyl)sulfone, 2,4-bis-(3,5-dimethyl-4-2024PF30072-Ausland hydroxyphenyl)-2-methylbutane, 1,1-bis-(3,5-dimethyl-4-hydroxyphenyl)-p-diisopropylbenzene and 1,1-Bis-(4-hydroxyphenyl)-3,3,5-trimethylcyclohexane, and dihydroxyaryl compounds (I) to (III)

[0048] These and other suitable dihydroxyaryl compounds are described, for example, in US 3 028 635 A, US 2 999 835 A, US 3 148 172 A, US 2 991 273 A, US 3 271 367 A, US 4 982 014 A and US 2 999 846 A, in DE 1 570 703 A, DE 2063 050 A, DE 2 036 052 A, DE 2 211 956 A and DE 3 832 396 A, in FR 1 561 518 A, in the monograph "H. Schnell, Chemistry and Physics of Polycarbonates, Interscience Publishers, New York 1964" as well as in JP 62039 / 1986 A, JP 62040 / 1986 A and JP 105550 / 1986 A described.

[0049] These dihydroxyaryl compounds can be used individually or in any mixture. The dihydroxyaryl compounds are known from the literature or can be obtained by methods known from the literature.

[0050] 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-furandimethanol, 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, and 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.

[0051] Suitable chain termination compounds for the production of polycarbonates include, 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 monoalkylphenols 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. Quantity 2024PF30072-Abroad

[0052] - 8 - the amount of chain terminators to be used is generally between 0.5 mol% and 10 mol%, based on the total moles of the dihydroxyaryl compounds used.

[0053] The thermoplastic aromatic polycarbonates have medium molecular weights (average weight M). w) preferably 15 to 50 kg / mol, more preferably 18 to 35 kg / mol, particularly preferably 24 to 32 kg / mol, measured by GPC (gel permeation chromatography) using dichloromethane as the solvent, calibrated with linear polycarbonates (from bisphenol A and phosgene) of known molar mass distribution from PSS Polymer Standards Service GmbH, Germany, calibrated according to method 2301-0257502-09D (from 2009 in German) of Currenta GmbH & Co. OHG, Leverkusen. The eluent is dichloromethane. Column combination made 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, temperature of the solutions: 30°C. Use of UV and / or RI detection.

[0054] The polycarbonates can be branched in a known manner, preferably by the incorporation of 0.05 to 2.0 mol%, based on the total number of dihydroxyaryl compounds used, of trifunctional or more than trifunctional compounds, for example, those with three or more phenolic groups. Linear polycarbonates are preferred, and linear polycarbonates based exclusively on bisphenol A are even more preferred.

[0055] Both homopolycarbonates and copolycarbonates are suitable. For the production of copolycarbonates according to the invention as per component A, 1 to 25 wt.%, preferably 2.5 to 25 wt.%, based on the total amount of dihydroxyaryl compounds to be used, of polydiorganosiloxanes with hydroxyaryloxy end groups can also be employed. These are known (US 3,419,634) and can be produced according to methods known from the literature. The production of the polydiorganosiloxane-containing copolycarbonates obtained in this way is described, for example, in DE-A 3,334,782 and W02015 / 052106 A2.

[0056] Copolycarbonates produced using diphenols of general formula (3a) are also preferred: 2024PF30072-Abroad

[0057] - 9 -

[0058] (3a)

[0059] R 5 for hydrogen or Ci- to C4-alkyl, Ci- to Cs-alkoxy, preferably for hydrogen;

[0060] Methoxy or methyl, stands,

[0061] R 6 , R 7 , R 8 and R 9 each independently of one another stand for Ci- to C4-alkyl or Ce- to Cn-aryl, preferably for methyl or phenyl,

[0062] Y represents a single bond, SO2-, -S-, -CO-, -O-, Ci- to Ce-alkylene, C2- to Ce-alkylidene, Ce- to Ci2-arylene, which may optionally be condensed with aromatic rings containing further heteroatoms, or a C5- to Ce-cycloalkylidene residue which may be substituted once or several times with Ci- to C4-alkyl, preferably a single bond, -O-, isopropylidene or a C5- to Ce-cycloalkylidene residue which may be substituted once or several times with Ci- to C4-alkyl.

[0063] V represents oxygen, C2- to Ce-alkylenes or C3- to Ce-alkylidenes, preferably oxygen or Cs-alkylenes; p, q and r each independently represent 0 or 1 when q = 0; W represents a single bond when q = 1 and r = 0; W represents oxygen, C2- to Ce-alkylenes or C3- to Ce-alkylidenes, preferably oxygen or Cs-alkylenes when q = 1 and r = 1; W and V each independently represent C2- to Ce-alkylenes or Cs- to Ce-alkylidenes, preferably Cs-alkylenes.

[0064] Z represents a Ci to Ce alkylene, preferably a Cs alkylene, o represents an average number of repeating units of 10 to 500, preferably 10 to 100, and m represents an average number of repeating units of 1 to 10, preferably 1 to 6, more preferably 1.5 to 5. It is also possible to use diphenols in which 2024PF30072-Ausland

[0065] - 10 - two or more siloxane blocks of general formula (3a) are linked together via terephthalic acid and / or isophthalic acid to form ester groups.

[0066] Particularly preferred are (poly)siloxanes of formulas (4) and (5) where RI stands for hydrogen, Ci to C4 alkyl, preferably for hydrogen or methyl, and particularly preferably for hydrogen,

[0067] R2 independently for aryl or alkyl, preferably for methyl,

[0068] X stands for a single bond, -SO2-, -CO-, -O-, -S-, Ci- to Ce -alkylenes, C2- to Cs-alkylidenes or for Ce- to Cn-arylene, which may optionally be condensed with further aromatic rings containing heteroatoms,

[0069] X preferably represents a single bond, Ci- to Cs-alkylenes, C2- to Cs-alkylidenes, Cs- to C12-cycloalkylidenes, -O-, -SO-, -CO-, -S-, -SO2-, particularly preferably X represents a single bond, isopropylidenes, Cs- to Cn-cycloalkylidenes or oxygen, and most preferably isopropylidenes, n represents an average number of 10 to 400, preferably 10 and 100, particularly preferably 15 to 50, and m represents an average number of 1 to 10, preferably 1 to 6 and particularly preferably 1.5 to 5.

[0070] The siloxane block can also preferably be derived from the following structure: 2024PF30072-Abroad

[0071] - 11 - where a in formula (6), (7), (7a) and (8) represents an average number of 10 to 400, preferably 10 to 100 and most preferably 15 to 50.

[0072] It is also preferred that at least two identical or different siloxane blocks of the general formulas (6), (7), (7a) or (8) are linked together via terephthalic acid and / or isophthalic acid to form ester groups. It is also preferred that in formula (3a) p = 0, V represents Cs-alkylene, r = 1, Z represents Cs-alkylene, R 8 and R 9 where q = 1 represents methyl, W represents Cs-alkylene, m = 1 represents R 5 R stands for hydrogen or Ci to C4 alkyl, preferably for hydrogen or methyl. 6 and R 7 Each independently represents Ci to C4 alkyl, preferably methyl, and o represents 10 to 500. Copolycarbonates with monomer units of formula (3a) and in particular their preparation are described in WO 2015 / 052106 A2.

[0073] Copolycarbonates with monomer units of formula (6) and in particular their preparation are described in WO 2015 / 052106 A2. 2024PF30072-Abroad

[0074] - 12 -

[0075] Aromatic dicarboxylic acid dihalides for the production of aromatic polyester carbonates are preferably the diacid dichlorides of isophthalic acid, terephthalic acid, diphenyl ether-4,4'-dicarboxylic acid, and naphthalene-2,6-dicarboxylic acid. Mixtures of the diacid dichlorides of isophthalic acid and terephthalic acid in a ratio between 1:20 and 20:1 are particularly preferred. In the production of polyester carbonates, a carbonic acid halide, preferably phosgene, is additionally used as a bifunctional acid derivative.

[0076] In addition to the monophenols already mentioned, other suitable chain terminators for the production of aromatic polyester carbonates include their chlorocarbonate esters, the acid chlorides of aromatic monocarboxylic acids, which may optionally be substituted by Ci to C22 alkyl groups or by halogen atoms, and aliphatic C2 to C22 monocarboxylic acid chlorides.

[0077] The amount of chain terminators is 0.1 to 10 mol% in each case, 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.

[0078] In the production of aromatic polyester carbonates, one or more aromatic hydroxycarboxylic acids can be used in addition.

[0079] The aromatic polyester carbonates can be either linear or branched in a known manner (see DE-A 2 940 024 and DE-A 3 007 934), but linear polyester carbonates are preferred.

[0080] Branching agents can include, for example, tri- or multi-functional carboxylic acid chlorides such as trimesic acid trichloride, cyanuric acid trichloride, 3,3'-,4,4'-benzophenone tetracarboxylic acid tetrachloride, 1,4,5,8-napthalin tetracarboxylic acid tetrachloride, or pyromellitic acid tetrachloride, or tri- or multi-functional 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-hydroxyphenylj-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-dihydroxyphenyl)-propane, Tetra-(4-[4-hydroxyphenyl-isopropyl]-phenoxyyl-methane, 1,4-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 submitted with the diphenols. Acid chloride branching agents can be submitted together with the acid dichlorides. 2024PF30072-Foreign.

[0081] - 13 -

[0082] In thermoplastic aromatic polyester carbonates, the number of carbonate structural units can vary arbitrarily. Preferably, the proportion of carbonate groups is up to 99.9 mol%, particularly up to 80 mol%, and most preferably up to 50 mol%, based on the sum of ester and carbonate groups. Both the ester and carbonate fractions of the aromatic polyester carbonates can be present in the form of blocks or statistically distributed within the polycondensate.

[0083] Suitable polyesters are preferably aromatic, and more preferably polyalkylene terephthalates. Particularly preferred are reaction products of aromatic dicarboxylic acids or their reactive derivatives, such as dimethyl esters or anhydrides, and aliphatic, cycloaliphatic, or araliphatic diols, as well as mixtures of these reaction products.

[0084] Particularly preferred aromatic polyalkylene terephthalates contain at least 80 wt.%, preferably at least 90 wt.%, based on the dicarboxylic acid component terephthalic acid residues and at least 80 wt.%, preferably at least 90 wt.%, based on the diol component ethylene glycol and / or butanediol-1,4 residues.

[0085] The preferred aromatic polyalkylene terephthalates may contain, in addition to terephthalic acid residues up to 20 mol%, preferably up to 10 mol%, residues of other aromatic or cycloaliphatic dicarboxylic acids with 8 to 14 C atoms or aliphatic dicarboxylic acids with 4 to 12 C atoms, such as residues of phthalic acid, isophthalic acid, naphthalene-2,6-dicarboxylic acid, 4,4'-diphenyldicarboxylic acid, mezzotinic acid, adipic acid, sebacic acid, azelaic acid, cyclohexanedioacetic acid.

[0086] The preferred aromatic polyalkylene terephthalates may contain, in addition to ethylene glycol or butanediol-1,4 residues up to 20 mol%, preferably up to 10 mol%, other aliphatic diols with 3 to 12 carbon atoms or cycloaliphatic diols with 6 to 21 carbon atoms, e.g., residues of propanediol-1,3, 2-ethylpropanediol-1,3, neopentyl glycol, pentanediol-1,5, hexanediol-1,6, cyclohexane-dimethanol-1,4, 3-ethylpentanediol-2,4, 2-methylpentanediol-2,4, 2,2,4-trimethylpentanediol-1,3, 2-ethylhexanediol-1,3, 2,2-diethylpropanediol-1,3, hexanediol-2,5, 1,4-di-(β-hydroxyethoxy)benzene. 2,2-Bis-(4-hydroxycyclohexyl)propane, 2,4-Dihydroxy-1,1,3,3-tetramethylcyclobutane, 2,2-Bis-(4-β-hydroxyethoxyphenyl)propane and 2,2-Bis-(4-hydroxypropoxyphenyl)propane (DE-A 2 407 674, 2 407 776, 2 715 932). 2024PF30072-Abroad

[0087] - 14 -

[0088] Aromatic polyalkylene terephthalates prepared solely from terephthalic acid and its reactive derivatives (e.g. its dialkyl esters) and ethylene glycol and / or butanediol-1,4 are particularly preferred, as are mixtures of these polyalkylene terephthalates.

[0089] Preferred mixtures of aromatic polyalkylene terephthalates contain 1 to 50 wt.%, preferably 1 to 30 wt.%, polyethylene terephthalate and 50 to 99 wt.%, preferably 70 to 99 wt.%, polybutylene terephthalate.

[0090] Aromatic polyalkylene terephthalates can be produced using known methods (see, for example, Kunststoff-Handbuch, Volume VIII, p. 695 ff, Carl-Hanser-Verlag, Munich 1973).

[0091] Component A is preferably a polycarbonate, more preferably an aromatic polycarbonate, more preferably an aromatic polycarbonate containing structural units derived from bisphenol-A, and most preferably an aromatic polycarbonate based exclusively on bisphenol-A as the diol component.

[0092] Component B

[0093] Component B of the compositions according to the invention includes a copolymer containing structural units derived from an olefin, preferably an α-olefin, as well as structural units derived from a (meth)acrylic acid alkyl ester.

[0094] Containing structural units “derived from an olefin” means, in the context of this invention, that an olefin is used in the production of component B. The olefin is then covalently incorporated into the polymer chain of the copolymer. For all other monomeric compounds involved in the structure of components A and B, the meaning of “derived from” within the scope of the present invention is to be understood analogously.

[0095] Preferred olefins as components of the copolymers are α-olefins and particularly preferably have between 2 and 10 carbon atoms and can be unsubstituted or substituted with one or more aliphatic, cycloaliphatic or aromatic groups.

[0096] Particularly preferred olefins are selected from the group comprising ethene, propene, 1-butene, 1-pentene, 1-hexene, 1-octene, and 3-methyl-1-pentene. Particularly preferred olefins are ethene and propene, with ethene being especially preferred. Mixtures of the olefins described are also suitable. 2024PF30072-Abroad

[0097] - 15 -

[0098] The production of polyolefins has long been known to those skilled in the art. Polyolefins are produced by chain polymerization of the aforementioned olefins, for example by radical polymerization.

[0099] The polymerization can be carried out, for example, at pressures of 1 to 3000 bar and temperatures between 20°C and 300°C, optionally using a catalyst system. Suitable catalysts include mixtures of titanium and aluminum compounds as well as metallocenes.

[0100] By changing the polymerization conditions and the catalyst system, the number of branches, the crystallinity, and the density of the polyolefins can be varied over a wide range. These measures are also familiar to those skilled in the art. The polyolefins can be semi-crystalline or amorphous, and linear or branched.

[0101] The (meth)acrylic acid alkyl ester (also referred to as ester-containing monomers or (meth)acrylates) is preferably a compound with a Ci to Cn alkyl group, more preferably a methyl, ethyl, propyl, isopropyl, butyl, sec-butyl, tert-butyl, isobutyl, pentyl, or hexyl group. The butyl and methyl groups are even more preferred.

[0102] Particularly preferred copolymers are ethylene methyl acrylate and ethylene butyl acrylate; ethylene methyl acrylate is most preferred.

[0103] The (meth)acrylic acid alkyl esters can be incorporated into the polymer in various ways, e.g. by radical copolymerization together with the aforementioned olefins or by grafting the ester-containing monomers onto a polyolefin.

[0104] The component B according to the invention has a number-averaged molecular weight M n at least 25 kg / mol, preferably at least 28 kg / mol, more preferably at least 30 kg / mol and most preferably at least 32 kg / mol.

[0105] The component B according to the invention has a weight-averaged molecular weight M w on a maximum of 250 kg / mol, preferably a maximum of 230 kg / mol, more preferably a maximum of 210 kg / mol and most preferably a maximum of 180 kg / mol.

[0106] Preferably, the number-averaged molecular weight M is nof component B at most 80, more preferably at most 50 kg / mol and the weight-averaged molecular weight M w Component B must be at least 100 kg / mol, preferably at least 120 kg / mol.

[0107] Preferably, component B has a ratio of M w / M n (Polydispersity) of at most 7. 2024PF30072-Abroad

[0108] - 16 -

[0109] The number-averaged molecular weight M n and the weight-averaged molecular weight M w The composition of component B is determined by gel permeation chromatography at 150 °C in o-dichlorobenzene as solvent with a polystyrene standard.

[0110] The content of structural units derived from (meth)acrylic acid alkyl esters in the copolymer is preferably between 2 and 40 wt.%, particularly preferably between 15 and 35 wt.%.

[0111] The copolymers according to component B have melt flow indices (melt mass flow rates) of preferably 0.5 to 40 g / 10 min, more preferably 1 to 20 g / 10 min, particularly preferably 1.5 to 10 g / 10 min, each measured according to DIN EN ISO 1133-1:2022-10 at 190°C and 2.16 kg.

[0112] Due to the various possible processing methods, the copolymers can exhibit either statistically distributed structural units derived from (meth)acrylic acid alkyl esters or a graft or block copolymer structure. Various manufacturing methods are disclosed, for example, in EP 0216267 Al. The term copolymer encompasses all types of polymers containing structural units derived from olefins and from at least one ester-containing monomer, regardless of the manufacturing method used.

[0113] Component B is preferably a copolymer with a melting point > 80 °C, more preferably > 90 °C, as measured by differential scanning calorimetry (DSC). Such copolymers can be produced in a tubular reactor, as described, for example, in US 2021 / 0163739 Al. They exhibit a tendency towards a block-like distribution of the structural units derived from the olefin and the acrylate. Improved mechanical properties can be achieved through the use of these copolymers.

[0114] In addition to the aforementioned olefins and (meth)acrylic acid alkyl esters, further monomeric compounds polymerizable with these monomers can be copolymerized during the preparation of component B. Compounds composed of more than two different monomers are also referred to as copolymers within the scope of the present invention.

[0115] Preferably, no other monomers besides olefins and (meth)acrylic acid alkyl esters are used.

[0116] Component C

[0117] Component C in the process according to the invention can be one or more polymer additives as well as other polymeric components different from A and B, preferably selected from the group consisting of flame retardants, anti-dripping agents, flame retardant synergists, smoke inhibitors, lubricants and demolding agents, nucleating agents, polymeric and non-polymeric antistatic agents, conductivity additives, stabilizers (e.g. hydrolysis, 2024PF30072-Ausland

[0118] - 17 -

[0119] Heat aging and UV stabilizers as well as transesterification inhibitors), flow promoters, phase compatibility mediators, impact modifiers (both with and without Kem shell structure), various polymeric blend partners of components A and B, fillers and reinforcing agents as well as dyes and pigments.

[0120] In a preferred embodiment, at least one polymer additive selected from the group consisting of lubricants and demolding agents, stabilizers, dyes, and pigments is used. In a preferred embodiment, at least one stabilizer selected from the group consisting of sterically hindered phenols, organic phosphites, and sulfur-based co-stabilizers is used.

[0121] Production of molding compounds and molded parts

[0122] Thermoplastic molding compounds can be produced from the compositions according to the invention.

[0123] The thermoplastic molding compounds according to the invention can be produced, for example, by melting and mixing the respective components of the compositions in a known manner, preferably at a temperature in the range of 200°C to 350°C, particularly preferably at 240°C to 320°C, and most preferably at 260°C to 300°C, and subsequently solidifying the composition by cooling the melt composition. This process is preferably carried out in conventional units such as internal kneading machines, extruders, and twin-screw extrusion machines. This process is generally referred to as (melt) compounding or (melt) extrusion.

[0124] Molding compound is therefore understood to be the product that is obtained when the components of the composition are melt compounded and melt extruded.

[0125] The mixing of the individual components of the compositions can be carried out in a known manner, both successively and simultaneously, at approximately 20°C (room temperature) as well as at higher temperatures. This means, for example, that some of the components can be metered via the main feed of an extruder, and the remaining components can be added later in the compounding process via a side extruder.

[0126] Another object of the present invention is therefore a method for producing a thermoplastic molding compound from a previously described composition according to the invention, comprising components A, B and optionally C, comprising steps 2024PF30072-Abroad

[0127] - 18 - a) Melting the composition and mixing the components contained therein at a temperature in the range of 200°C to 350°C and b) Solidifying the composition by cooling the composition,

[0128] Preferably, process step a) is carried out in a continuous twin-screw extruder. Equally preferably, process step a) is carried out with a residence time in the range of 10 seconds to 2 minutes, and more preferably from 15 seconds to 1 minute.

[0129] In step a), the melt mixture can also be degassed by applying a vacuum. The absolute pressure is preferably set to a maximum of 400 mbar, more preferably to a maximum of 200 mbar, and most preferably to a maximum of 100 mbar.

[0130] Granulation can be carried out after or directly before step b).

[0131] Another object of the present invention is a thermoplastic molding compound produced from a composition according to the invention or obtainable by the method according to the invention.

[0132] The molding compounds developed according to the invention can be used to produce molded parts of all kinds. These can be manufactured, for example, by injection molding, extrusion, and blow molding. Another processing method is the production of molded parts by deep drawing from previously manufactured sheets or films. The molding compounds developed according to the invention are particularly suitable for processing in extrusion, blow molding, and deep drawing processes.

[0133] It is also possible to dose the components of the compositions directly into an injection molding machine or an extrusion unit and process them into molded bodies.

[0134] Examples of such molded parts that can be produced from the inventive compositions and molding compounds include films, profiles, and molded parts of all kinds, e.g., for the transportation sector, especially the automotive industry, the electrical / electronics sector, the construction sector, household appliances, and medical technology. The inventive compositions and molding compounds are particularly suitable for the production of automotive components for both interior and exterior applications.

[0135] Further embodiments of the present invention are described below:

[0136] 1. Composition containing 2024PF30072-Foreign country

[0137] - 19 -

[0138] A) a polymer selected from the group consisting of polycarbonates, polyesters and polyester carbonates,

[0139] B) a copolymer containing structural units derived from an olefin and containing structural units derived from a (meth)acrylic acid alkyl ester, characterized in that the number-averaged molecular weight M n component B is at least 25 kg / mol and the weight-averaged molecular weight M w component B is at most 250 kg / mol and where the number-averaged molecular weight M n of component B and the weight-averaged molecular weight M w The composition of component B is determined by gel permeation chromatography at 150 °C in o-dichlorobenzene as solvent with a polystyrene standard, wherein the composition is free of polymers containing structural units derived from butadiene.

[0140] 2. Composition according to embodiment 1, characterized in that component B has a ratio of M w / M n has a maximum of 7.

[0141] 3. Composition according to embodiment 1 or 2, characterized in that the number-averaged molecular weight M n The component B must be at least 28 kg / mol.

[0142] 4. Composition according to embodiment 1 or 2, characterized in that the number-averaged molecular weight M n The component B is at least 32 kg / mol.

[0143] 5. Composition according to one of the preceding embodiments, characterized in that the weight-averaged molecular weight M w The density of component B is at most 210 kg / mol.

[0144] 6. Composition according to one of the preceding embodiments, characterized in that the weight-averaged molecular weight M w The density of component B is at most 180 kg / mol.

[0145] 7. Composition according to one of the preceding embodiments, characterized in that the number-averaged molecular weight M n The density of component B is at most 80 kg / mol.

[0146] 8. Composition according to one of the preceding embodiments, characterized in that the number-averaged molecular weight M n The concentration of component B is at most 50 kg / mol.

[0147] 9. Composition according to one of the preceding embodiments, characterized in that the weight-averaged molecular weight M w The density of component B is at least 100 kg / mol.

[0148] 10. Composition according to one of the preceding embodiments, characterized in that the weight-averaged molecular weight M w The density of component B is at least 120 kg / mol. 2024PF30072-Abroad

[0149] - 20 -

[0150] 11. Composition according to one of the preceding embodiments, characterized in that component A has an average molecular weight M w , measured by gel permeation chromatography at room temperature in methylene chloride as solvent with bisphenol A-based polycarbonate as standard, has a density of 18 to 35 kg / mol.

[0151] 12. Composition according to one of the preceding embodiments, characterized in that component B comprises a proportion of 2 to 40 wt.% of structural units derived from a (meth)acrylic acid alkyl ester.

[0152] 13. Composition according to one of the preceding embodiments, characterized in that component B comprises a proportion of 5 to 35 wt.% of structural units derived from a (meth)acrylic acid alkyl ester.

[0153] 14. Composition according to one of the preceding embodiments, characterized in that component B has a melt mass flow rate of 0.5 to 40 g / 10 min at 190 °C and 2.16 kg determined according to DIN EN ISO 1133-1:2022-10.

[0154] 15. Composition according to one of the preceding embodiments, characterized in that component B has a melt mass flow rate of 1.5 to 10 g / 10 min at 190 °C and 2.16 kg determined according to DIN EN ISO 1133-1:2022-10.

[0155] 16. Composition according to one of the preceding embodiments, characterized in that component B contains structural units derived from methyl acrylate (methyl acrylate).

[0156] 17. Composition according to one of the preceding embodiments, characterized in that component B contains exclusively structural units derived from methyl acrylate (methyl acrylate) as structural units derived from (meth)acrylic acid alkyl esters.

[0157] 18. Composition according to one of the preceding embodiments, characterized in that no monomers other than olefins and (meth)acrylic acid alkyl ester are used in the production of component B.

[0158] 19. Composition according to one of the preceding embodiments, characterized in that component B has a melting point, measured by differential scanning calorimetry (DSC), of greater than 80 °C.

[0159] 20. Composition according to one of the preceding embodiments, characterized in that component B has a melting point, measured by differential scanning calorimetry (DSC), of greater than 90 °C.

[0160] 21. Composition according to one of the preceding embodiments, characterized in that component B is produced in a tubular reactor.

[0161] 22. Composition according to one of the preceding embodiments, characterized in that component A is an aromatic polycarbonate containing structural units derived from bisphenol A. 2024PF30072-Abroad

[0162] - 21 -

[0163] 23. Composition according to one of the preceding embodiments, characterized in that component A is an aromatic polycarbonate based exclusively on structural units derived from bisphenol A.

[0164] 24. Composition according to one of the preceding embodiments, characterized in that component B, based on a total of 100 parts by weight of components A and B, is used in an amount of 0.5 to 50 parts by weight.

[0165] 25. Composition according to one of the preceding embodiments, characterized in that component B is used in an amount of 1.5 to 30 parts by weight, based on a total of 100 parts by weight of components A and B.

[0166] 26. Composition according to one of the preceding formulations, optionally containing as component C polymer additives and / or other polymeric blend partners different from components A and B.

[0167] 27. Composition according to embodiment 26, wherein component C is selected from the group consisting of lubricants and demolding agents, stabilizers, dyes and pigments.

[0168] 28. Composition according to design 26 or 27, containing

[0169] 50 to 99.5 parts by weight of component A,

[0170] 0.5 to 50 parts by weight of component B,

[0171] 0 to 35 parts by weight of component C, where all parts by weight are based on a total of 100 parts by weight of components A and B.

[0172] 29. Composition according to version 26 or 27, containing

[0173] 70 to 98.5 parts by weight of component A,

[0174] 1.5 to 30 parts by weight of component B,

[0175] 0 to 5 parts by weight of component C, where all parts by weight are based on a total of 100 parts by weight of components A and B.

[0176] 30. Composition according to one of the previous versions, consisting of 98 wt% of components A to C.

[0177] 31. Composition according to one of the previous formulations, consisting of components A to C.

[0178] 32. A method for producing a thermoplastic molding compound from a composition according to a previous embodiment, comprising the steps of a) melting the composition and mixing the components contained therein at a temperature in the range of 200°C to 350°C and b) solidifying the composition by cooling it. 2024PF30072-Abroad

[0179] - 22 -

[0180] 33. Method according to embodiment 32, characterized in that process step a) is carried out in a continuous twin-shaft extruder with a residence time in the range of 15 seconds to 1 minute.

[0181] 34. Thermoplastic molding compound produced from a composition according to one of the embodiments 1 to 31 or by a process according to one of the embodiments 32 or 33.

[0182] 35. Molded body containing a composition according to one of the embodiments 1 to 31 or obtained from a molding compound according to embodiment 34.

[0183] Examples

[0184] Compositions and components used therein

[0185] Component Al

[0186] Linear polycarbonate based on bisphenol-A with a weight-averaged molecular weight M w of 31,000 g / mol (determined by GPC in methylene chloride as solvent against a bisphenol A polycarbonate standard at room temperature).

[0187] Component B 1

[0188] Lotryl™ 35BA320 (SK Functional Polymer, France) is an ethylene-butyl acrylate copolymer with a butyl acrylate-derived structural unit content of 35 wt% and a melt flow rate of 320 g / 10 min at 190 °C and 2.16 kg measured according to ISO 1133-1 (version 2012-03). Component Bl has a melting point of 65 °C, measured by differential scanning calorimetry (DSC). Component Bl is not produced in a tubular reactor.

[0189] Component B2

[0190] Lotryl™ 35BA320T (SK Functional Polymer, France) is an ethylene-butyl acrylate copolymer with a butyl acrylate-derived structural unit content of 35% by weight and a melt flow rate of 320 g / 10 min at 190 °C and 2.16 kg measured according to ISO 1133-1 (version 2012-03). Component B2 has a melting point of 90 °C, measured by differential scanning calorimetry (DSC). Component B2 is produced in a tubular reactor.

[0191] Component B3

[0192] Lotryl™ 35BA40 (SK Functional Polymer, France) is an ethylene-butyl acrylate copolymer with a content of 35 wt% butyl acrylate-derived structural units and a 2024PF30072 foreign

[0193] - 23 -

[0194] Melting flow index of 40 g / 10 min at 190 °C and 2.16 kg measured according to ISO 1133-1 (version 2012-03). Component B3 has a melting point of 66 °C, measured by differential scanning calorimetry (DSC). Component B3 is not produced in a tubular reactor.

[0195] Component B4

[0196] Lotryl™ 35BA40T (SK Functional Polymer, France) is an ethylene-butyl acrylate copolymer with a butyl acrylate-derived structural unit content of 35% by weight and a melt flow rate of 40 g / 10 min at 190 °C and 2.16 kg, measured according to ISO 1133-1 (version 2012-03). Component B4 has a melting point of 89 °C, measured by differential scanning calorimetry (DSC). Component B4 is produced in a tubular reactor.

[0197] Component B5

[0198] ELVALOY™ AC 1820 Acrylate Copolymer (The Dow Chemical Company, Midland, USA) is an ethylene-methyl acrylate copolymer with a methyl acrylate content of 20% by weight and a melt flow rate of 8 g / 10 min at 190 °C and 2.16 kg, measured according to DIN EN ISO 1133-1 (version 2022-10). Component B5 has a melting point of 92 °C, measured by differential scanning calorimetry (DSC). Component B5 is produced in a tubular reactor.

[0199] Component B6

[0200] Lotryl™ 24MA02 (SK Functional Polymer, France) is an ethylene-methyl acrylate copolymer with a methyl acrylate-derived structural unit content of 24% by weight and a melt flow rate of 2 g / 10 min at 190 °C and 2.16 kg, measured according to DIN EN ISO 1133-1 (version 2022-10). Component B6 has a melting point of 68 °C, measured by differential scanning calorimetry (DSC). Component B6 is not produced in a tubular reactor.

[0201] Component B7

[0202] Lotryl™ 24MA02T (SK Functional Polymer, France) is an ethylene-methyl acrylate copolymer with a methyl acrylate-derived structural unit content of 24 wt% and a melt flow rate of 2 g / 10 min at 190 °C and 2.16 kg measured according to ISO 1133-1 (version 2012-03). Component B7 has a melting point of 95 °C, measured by differential scanning calorimetry (DSC). Component B7 is produced in a tubular reactor. 2024PF30072-Abroad

[0203] - 24 -

[0204] The molecular weight distributions of components Bl to B7 were determined by gel permeation chromatography (GPC) at 150 °C in o-dichlorobenzene as solvent with a polystyrene standard. The values ​​for M listed in Table 1 were derived from the molecular weight distributions thus determined. w and M n as well as the polydispersity M w / M n Calculated.

[0205] Production of thermoplastic molding compounds and molded parts

[0206] The PC / ethylene (meth)acrylate copolymer molding compounds listed in Table 1 were produced on a ZSK26 MC 18 twin-shaft extruder from Coperion GmbH (Stuttgart, Germany) at a melt temperature at the die exit of approximately 280°C. A vacuum of 100 mbar (absolute) was applied. The residence time of the melt mixture in the extruder was approximately 30 s.

[0207] The test specimens were produced on an Arburg 270 E injection molding machine at a melt temperature of 280°C and a tool temperature of 80°C.

[0208] Inspection of the molded parts produced from the molding compounds

[0209] To assess material ductility under multiaxial loading at low temperatures, a puncture test according to ISO 6603-2 (2002 version) was performed at -30°C on ten specimens each, measuring 60 mm x 60 mm x 2 mm. The arithmetic mean of the total energies measured in the ten individual tests serves as a measure of material ductility under multiaxial loading.

[0210] Material shrinkage was determined in accordance with ISO 294-4:2018 using test plates measuring 60 mm x 60 mm x 2 mm. The injection-molded test plates were produced at a melt temperature of 280°C, a mold temperature of 80°C, and a holding pressure of 500 bar. Material shrinkage values ​​were determined longitudinally and transversely to the injection molding direction, and the anisotropy of the material shrinkage was calculated as the difference between these two values. 2024PF30072-Abroad

[0211] - 25 -

[0212] Table 1: PC / Ethylene-fMethlAcrylate Copolymer Molding Compounds and their Properties

[0213] 2024PF30072

[0214] - 26 -

[0215] The data in Table 1 show that molded parts made from the composition according to the invention, containing the component B7 according to the invention (Ex. 7), exhibit significantly improved low-temperature ductility in the multiaxial puncture test at -30 °C compared to molded parts made from the non-inventive compositions containing the non-inventive components B1 to B6 (see 1 to 6). The material shrinkage is comparable to that of the composition according to the invention.

[0216] The composition is at a low level and exhibits low anisotropy, i.e., a small difference between the transverse and longitudinal material shrinkage related to the injection molding direction.

Claims

2024PF30072-Abroad - 27 - Patent claims 1. Composition containing A) a polymer selected from the group consisting of polycarbonates, polyesters and polyester carbonates, B) a copolymer containing structural units derived from an olefin and containing structural units derived from a (meth)acrylic acid alkyl ester, characterized in that the number-averaged molecular weight M n component B is at least 25 kg / mol and the weight-averaged molecular weight M w component B is at most 250 kg / mol and where the number-averaged molecular weight M n of component B and the weight-averaged molecular weight M wThe composition of component B is determined by gel permeation chromatography at 150 °C in o-dichlorobenzene as solvent with a polystyrene standard, wherein the composition is free of polymers containing structural units derived from butadiene.

2. Composition according to claim 1, characterized in that component B has a ratio of M w / M n has a maximum of 7.

3. Composition according to one of the preceding claims, characterized in that the number-averaged molecular weight M n The molecular weight of component B is at most 80 kg / mol and the weight-average molecular weight M w The density of component B is at least 100 kg / mol.

4. Composition according to one of the preceding claims, characterized in that component B comprises a proportion of structural units derived from at least one (meth)acrylic acid alkyl ester of 2 to 40 wt.%.

5. Composition according to one of the preceding claims, characterized in that component B has a melt mass flow rate of 0.5 to 40 g / 10 min at 190 °C and 2.16 kg determined according to DIN EN ISO 1133-1:2022-10.

6. Composition according to one of the preceding claims, characterized in that component B contains structural units derived from methyl acrylate. 2024PF30072-Abroad - 28 - 7. Composition according to one of the preceding claims, characterized in that component B has a melting point greater than 80 °C, measured by differential scanning calorimetry (DSC).

8. Composition according to one of the preceding claims, characterized in that component B was produced in a tubular reactor.

9. Composition according to one of the preceding claims, characterized in that component A is an aromatic polycarbonate containing structural units derived from bisphenol A.

10. Composition according to one of the preceding claims, characterized in that component B, based on a total of 100 parts by weight of components A and B, is used in an amount of 0.5 to 50 parts by weight.

11. Composition according to any one of the preceding claims, wherein the composition consists of the following components: 50 to 99.5 parts by weight of component A, 0.5 to 50 parts by weight of components B and 0 to 35 parts by weight of at least one polymer additive selected from the group consisting of lubricants and release agents, stabilizers, dyes and pigments as component C, and wherein all parts by weight are based on a total of 100 parts by weight of components A and B.

12. Method for producing a thermoplastic molding compound from a composition containing, A) a polymer selected from the group consisting of polycarbonates, polyesters and polyester carbonates, B) a copolymer containing structural units derived from an olefin and containing structural units derived from a (meth)acrylic acid alkyl ester, wherein the number-averaged molecular weight M n component B is at least 25 kg / mol and the weight-averaged molecular weight M w component B is at most 250 kg / mol, and where the number-averaged molecular weight M n of component B and the weight-averaged molecular weight M w The composition of component B was determined by gel permeation chromatography at 150 °C in o-dichlorobenzene as solvent with a polystyrene standard. 2024PF30072-Abroad - 29 - and wherein the composition is free from polymers containing structural units derived from butadiene, comprising the steps a) melting the composition and mixing the components contained therein at a temperature in the range of 200°C to 350°C and b) solidifying the composition by cooling the composition, 13. Method according to claim 12, characterized in that process step a) is carried out in a continuous twin-shaft extruder with a residence time in the range of 15 seconds to 1 minute.

14. Thermoplastic molding compound produced from a composition according to any one of claims 1 to 11 or by a method according to any one of the preceding claims 12 to 13.

15. Molded body comprising a composition according to any one of claims 1 to 11 or obtained from a molding compound according to claim 14.

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