Flame-retardant polycarbonate composition

Abstract

The present application relates to a flame-retardant polycarbonate composition and shaped articles made therefrom. The polycarbonate composition comprises the following components: an optional virgin aromatic polycarbonate, a post-consumer recycled (PCR) linear aromatic polycarbonate, a surface treated talc, a phosphorus-containing flame retardant, at least two impact modifiers, and an anti-dripping agent. The shaped article made from the polycarbonate composition according to the present invention has a good combination of mechanical properties such as impact strength and tensile modulus, flame retardancy, and flowability.

Description

[0001]2024PF30051-Foreign Countries FLAME-RETARDANT POLYCARBONATE COMPOSITIONTECHNICAL FIELD The present invention relates to a flame-retardant polycarbonate composition.In addition, the present invention also relates to shaped articles made from the poly-carbonate composition. BACKGROUND ART Polymers are used in a number of applications on a daily basis. On one hand,many polymeric items, e.g. packaging, medicine, electronics, end up in the waste stream, which may cause environmental pollutions and affect the health of all creatures on the earth. On the other hand, the manufacturing of polymers consumes fossil re- sources and generate carbon dioxide and other greenhouse gases which also lead to weather and ecological issues. Re-use and recycling of the polymers are effective to resolve these issues and has attracted the increasing industrial attentions in recent years. Polycarbonate (PC), as a high-performance engineering plastic, has been widely used in housing of electrical and electronic devices, automotive industry, medicalequipment, etc. With the rapid growth of polycarbonate production and sales, moreand more polycarbonate waste has been generated. How to recycle or reuse it be-comes an important issue in industry. There are two types of recycled sources for mechanical recycling. One is so-called post-industrial recycled (PIR) which is all sorts of scraps and wastes generated during the polymer processing stage. Another is so-called post-consumer recycled (PCR) which comes from finished goods that are collected from the consumers or endusers. The PCR materials usually undergo more degradation and contains more con-taminations than PIR materials. Thus it is more difficult to reuse PCR materials and ithas a high possibility to discard PCR materials. In this sense, PCR materials are pre-ferred to be reused and are more valuable than PIR materials, since they can lead tomore reduction of carbon footprints and other climate-impact substances.Companies in electrical and electronic (E&E) industry presently are main driversto promote the usage of recycled polymers. And higher recycled contents (even morethan 65 wt% in polymer compositions) are preferred recently, especially in the note-book application. Many materials for notebook housing applications are required to 2024PF30051-Foreign Countrieshave good flowability and mechanical properties as well as flame-retardant perfor-mance. Attempts have already been made to replace virgin polycarbonate with post-consumer recycled polycarbonate in some industry applications. However, it is still diffi-cult for polycarbonate compositions with high post-consumer recycled polycarbonatecontents to achieve comparable properties (such as flowability, mechanical properties,flame-retardancy) with virgin polycarbonate compositions in notebook applications.CN111269546B2 discloses a regenerated halogen-free flame-retardant composi-tion comprising 74 wt.% of recycled polycarbonate, 10 wt.% of acrylonitrile-butadiene-,5-25 wt.% of mineral filler, 10 wt.% of non-halogen flame retardant, and other additives.However, the molded parts based on the claimed composition cannot meet mechani-cal properties requirements in notebook housing applications.CN101668804A discloses a thermoplastic polycarbonate composition compris-ing 30-89.5 wt.% of aromatic polycarbonate, 0.5-20 wt.% of impact modifier, 0-25wt.% of an aromatic vinyl copolymer, 6-35 wt.% of mineral filler and other additives.However, the molded parts based on the polycarbonate composition cannot achievegood flame-retardant performance required in notebook housing applications.Therefore, it is still desired to develop a new polycarbonate composition with arelatively high post-consumer recycled polycarbonate content, which can achievecomparable properties (such as good flowability, mechanical properties, flame-retardancy) with compositions based on virgin polycarbonate.SUMMARY OF THE INVENTION One object of the present application is thus to provide a polycarbonate com-position with a relatively high post-consumer recycled polycarbonate content, whichhas a good combination of flowability, flame retardancy and mechanical propertiessuch as impact strength and tensile modulus.Another object of the present application is to provide a molded article which has a good combination of flame retardancy and mechanical properties such as impactstrength and tensile modulus.Thus, in a first aspect, the present invention provides a polycarbonate composi- tion comprising the following components, relative to the total weight of the composi- tion: A) no more than 5 wt.% of virgin aromatic polycarbonate, B) from 63 wt.% to 74 w.t% of post-consumer recycled (PCR) linear aromaticpolycarbonate, 2024PF30051-Foreign Countries C) from 13 wt.% to 18 wt.% of surface treated talc,D) from 8 wt.% to 14 wt.% of a phosphorus-containing flame retardant,E1) from 1 wt.% to 5 wt.% of ethylene-(meth)acrylate copolymer,E2) from 1 wt.% to 5 wt.% of acrylonitrile-butadiene-styrene and / or pol-ysilsesquioxane, and F) from 0.2 wt.% to 1.0 wt.% of anti-dripping agent, wherein the total content of component E1 and component E2 in the composi- tion is in a range of from 3 wt.% to 8 wt.%. The composition according to the present invention have a melt volume rate(MVR) of no less than 13 cm3 / 10 min as measured according to ISO 1133-1: 2011 at 240oC and 5 kg loading, which is suitable for processing.The inventors have discovered that molded article made from the composition according to the present invention has a Izod un-notched impact strength of no lessthan 65 KJ / m2 as measured according to ISO 180 / U: 2000, a tensile modulus of no lessthan 4200 MPa as measured according to ISO 527-2: 2012, a flame retardancy level ofV0 at a thickness of 1.2 mm as measured according to UL94:2015.According to a second aspect, the present invention provides a shaped article made from the composition according to the present invention. According to a third aspect, the present invention provides a method for pre- paring the shaped article mentioned above, comprising injection moulding, extrusionmoulding, blowing moulding process or thermoforming the composition according tothe present invention. Other subjects and characteristics, aspects and advantages of the present invention will emerge even more clearly on reading the description and the examples that follow. DETAILED DESCRIPTION OF THE INVENTION In that which follows and unless otherwise indicated, the limits of a range of val-ues are included within this range, in particular in the expressions "between … and …"and "from ... to ...". Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which the present invention pertains. When the definition of a term in the present descrip- tion conflicts with the meaning as commonly understood by those skilled in the art the present invention belongs to, the definition described herein shall apply. 2024PF30051-Foreign Countries Throughout the instant application, the term “comprising” is to be interpreted as encompassing all specifically mentioned features as well optional, additional, un- specified ones. As used herein, the use of the term “comprising” also discloses the embodiment wherein no features other than the specifically mentioned features arepresent (i.e. “consisting of”).Unless otherwise specified, all numerical values expressing amount of ingredi- ents and the like which are used in the description and claims are to be understood asbeing modified by the term “about”.Component A The polycarbonate composition according to the present invention may com-prise a virgin aromatic polycarbonate as component A.As used herein, virgin aromatic polycarbonate indicates pure aromatic polycar-bonate, i.e., it is not specified as “post-consumer recycled polycarbonate” or “PCRpolycarbonate”. According to the invention, “aromatic polycarbonates” or else just “polycar- bonates” is to be understood as meaning both homopolycarbonates and copolycar- bonates. These polycarbonates may be linear or branched in known fashion. According to the invention, mixtures of polycarbonates may also be used. Aromatic polycarbonates selected in accordance with the invention preferably have weight-average molecular weights Mwof 15000 to 40000 g / mol, more prefera- bly of 16000 to 34000 g / mol, even more preferably of 17000 to 33000 g / mol, most preferably of 19000 to 32000 g / mol. The values for Mw here are determined by a gel permeation chromatography, calibrated against bisphenol A polycarbonate standards using dichloromethane as eluent, calibration with linear polycarbonates (made of bi- sphenol A and phosgene) of known molar mass distribution from PSS Polymer Stand- ards Service GmbH, Germany; calibration according to method 2301-0257502-09D (2009 Edition in German) from Currenta GmbH & Co. OHG, Leverkusen. The eluent is dichloromethane. Column combination of crosslinked styrene-divinylbenzene resins. Diameter of analytical columns: 7.5 mm; length: 300 mm. Particle sizes of column ma- terial: 3 µm to 20 µm. Concentration of solutions: 0.2% by weight. Flow rate: 1.0 ml / min, temperature of solutions: 30°C. Detection using a refractive index (RI) detector. The polycarbonates are preferably produced by the interfacial process or the melt transesterification process, which have been described many times in the litera- ture. 2024PF30051-Foreign Countries With regard to the interfacial process reference is made for example to H. Schnell, “Chemistry and Physics of Polycarbonates”, Polymer Reviews, Vol. 9, Inter- science Publishers, New York 1964 p. 33 et seq., to Polymer Reviews, Vol. 10, “Con- densation Polymers by Interfacial and Solution Methods”, Paul W. Morgan, Inter- science Publishers, New York 1965, Chapt. VIII, p. 325, to Dres. U. Grigo, K. Kircher andP. R- Müller “Polycarbonate” in Becker / Braun, Kunststoff-Handbuch, Volume 3 / 1,Polycarbonate, Polyacetale, Polyester, Celluloseester, Carl Hanser Verlag Munich, Vien- na 1992, pp. 118-145 and also to EP 0517044 A1. The melt transesterification process is described, for example, in the “Encyclo- pedia of Polymer Science”, Vol. 10 (1969), Chemistry and Physics of Polycarbonates, Polymer Reviews, H. Schnell, Vol. 9, John Wiley and Sons, Inc. (1964), and in patent specifications DE 1031512 A and US 6,228,973 B1. Particulars pertaining to the production of polycarbonates are disclosed in many patent documents spanning approximately the last 40 years. Reference may be made here by way of example to Schnell, “Chemistry and Physics of Polycarbonates”, Polymer Reviews, Volume 9, Interscience Publishers, New York, London, Sydney 1964, to D. Freitag, U. Grigo, P.R. Müller, H. Nouvertné, BAYER AG, “Polycarbonates” in Encyclopedia of Polymer Science and Engineering, Volume 11, Second Edition, 1988, pages 648-718, and finally to U. Grigo, K. Kirchner and P.R. Müller “Polycarbonate” in Becker / Braun, Kunststoff-Handbuch, Volume 3 / 1, Polycarbonate, Polyacetale, Polyester, Celluloseester, Carl Hanser Verlag Munich, Vienna 1992, pages 117-299. The production of aromatic polycarbonates is effected for example by reaction of dihydroxyaryl compounds with carbonic halides, preferably phosgene, and / or with aromatic dicarboxyl dihalides, preferably benzenedicarboxyl dihalides, by the interfacial process, optionally using chain terminators and optionally using trifunctional or more than trifunctional branching agents, production of the polyester carbonates being achieved by replacing a portion of the carbonic acid derivatives with aromatic dicar- boxylic acids or derivatives of the dicarboxylic acids, specifically with aromatic dicar- boxylic ester structural units according to the carbonate structural units to be replaced in the aromatic polycarbonates. Preparation via a melt polymerization process by reac- tion of dihydroxyaryl compounds with, for example, diphenyl carbonate is likewise pos- sible. Dihydroxyaryl compounds suitable for the production of polycarbonates are for example hydroquinone, resorcinol, dihydroxydiphenyls, bis(hydroxyphenyl)alkanes, bis(hydroxyphenyl)cycloalkanes, bis(hydroxyphenyl) sulfides, bis(hydroxyphenyl) ethers, bis(hydroxyphenyl) ketones, bis(hydroxyphenyl) sulfones, bis(hydroxyphenyl) sulfoxides, 2024PF30051-Foreign Countries α,α’-bis(hydroxyphenyl)diisopropylbenzenes, phthalimidines derived from derivatives of isatin or phenolphthalein and the ring-alkylated, ring-arylated and ring-halogenated compounds thereof. Preferred dihydroxyaryl compounds are 4,4’-dihydroxydiphenyl, 2,2-bis(4- hydroxyphenyl)propane (bisphenol A), 2,4-bis(4-hydroxyphenyl)-2-methylbutane, 1,1- bis(4-hydroxyphenyl)-p-diisopropylbenzene, 2,2-bis(3-methyl-4- hydroxyphenyl)propane, dimethylbisphenol 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-hydroxyphenyl)-2- methylbutane, 1,1-bis(3,5-dimethyl-4-hydroxyphenyl)-p-diisopropylbenzene and 1,1- bis(4-hydroxyphenyl)-3,3,5-trimethylcyclohexane and also the bisphenols (I) to (III) in which R’ in each case stands for C1- to C4-alkyl, aralkyl or aryl, preferably for methylor phenyl, very particularly preferably for methyl. Particularly preferred dihydroxyaryl compounds are 2,2-bis(4- hydroxyphenyl)propane (bisphenol A), 2,2-bis(3,5-dimethyl-4-hydroxyphenyl)propane, 1,1-bis(4-hydroxyphenyl)cyclohexane, 1,1-bis(4-hydroxyphenyl)-3,3,5- trimethylcyclohexane, 4,4’-dihydroxybiphenyl, and dimethylbisphenol A and also the diphenols of formulae (I), (II) and (III). These and other suitable dihydroxyaryl compounds are described for example in US 3028635 A, US 2999825 A, US 3148172 A, US 2991273 A, US 3271367 A, US 4982014 A und US 2999846 A, in DE 1570703 A, DE 2063050 A, DE 2036052 A, DE 2211956 A and US 2999846 A, in DE 1570703 A, DE 2063050 A, DE 2036052 A, DE 2211956 A and DE 3832396 A, in FR 1561518, in the monograph “H. Schnell, Chemistry and Physics of Polycarbonates, Interscience Publishers, New York 1964” and also in JP 62039 / 1986 A, JP 62040 / 1986 A and JP 105550 / 1986 A. In the case of homopolycarbonates only one dihydroxyaryl compound is used; in the case of copolycarbonates two or more dihydroxyaryl compounds are used. The dihydroxyaryl compounds employed, similarly to all other chemicals and assistants added to the synthesis, may be contaminated with the contaminants from their own 2024PF30051-Foreign Countries synthesis, handling and storage. However, it is desirable to use raw materials of the highest possible purity. Suitable carbonic acid derivatives are for example phosgene and diphenyl car- bonate. Suitable chain terminators that may be used in the production of polycar- bonates are monophenols. Suitable monophenols are for example phenol itself, al- kylphenols such as cresols, p-tert-butylphenol, cumylphenol and mixtures thereof. Preferred chain terminators are the phenols mono- or polysubstituted by linearor branched C1- to C30-alkyl radicals, preferably unsubstituted or substituted by tert-butyl. Particularly preferred chain terminators are phenol, cumylphenol and / or p-tert- butylphenol. The amount of chain terminator to be employed is preferably 0.1 to 5 mol% based on the moles of diphenols employed in each case. The addition of the chain terminators may be effected before, during or after the reaction with a carbonic acid derivative. Suitable branching agents are the trifunctional or more than trifunctional com- pounds familiar in polycarbonate chemistry, in particular those having three or more than three phenolic OH groups. Suitable branching agents are for example 1,3,5-tri(4- hydroxyphenyl)benzene, 1,1,1-tri(4-hydroxyphenyl)ethane, tri(4- hydroxyphenyl)phenylmethane, 2,4-bis(4-hydroxyphenylisopropyl)phenol, 2,6-bis(2- hydroxy-5’-methylbenzyl)-4-methylphenol, 2-(4-hydroxyphenyl)-2-(2,4- dihydroxyphenyl)propane, tetra(4-hydroxyphenyl)methane, tetra(4-(4-hydroxyphenylisopropyl)phenoxy)methane and 1,4-bis((4‘,4“-dihydroxytriphenyl) me-thyl)benzene and 3,3-bis(3-methyl-4-hydroxyphenyl)-2-oxo-2,3-dihydroindole.The amount of the branching agents for optional employment is preferably 0.05 mol% to 2.00 mol%, based on moles of dihydroxyaryl compounds used in each case. The branching agents may be either initially charged together with the dihydroxyaryl com- pounds and the chain terminators in the aqueous alkaline phase or added dissolved in an organic solvent before the phosgenation. In the case of the transesterification pro- cess the branching agents are employed together with the dihydroxyaryl compounds. Particularly preferred polycarbonates are the homopolycarbonate based on bi- sphenol A, the homopolycarbonate based on 1,1-bis(4-hydroxyphenyl)-3,3,5- trimethylcyclohexane, 4,4’-dihydroxybiphenyl, and the copolycarbonates based on the two monomers bisphenol A and 1,1-bis(4-hydroxyphenyl)-3,3,5-trimethylcyclohexane and also homo- or copolycarbonates derived from the diphenolsof formulae (I), (II) and (III) 2024PF30051-Foreign Countries in which R’ in each case stands for C1- to C4-alkyl, aralkyl or aryl, preferably for methylor phenyl, very particularly preferably for methyl. Preferred are also polycarbonates for the production of which dihydroxyaryl compounds of the following formula (1a) have been used: (1a), wherein R5 stands for hydrogen or C1- to C4-alkyl, C1- to C4-alkoxy, preferably for hydro-gen or methyl or methoxy particularly preferably for hydrogen, R6, R7, R8 and R9 mutually independently stand for C6- to C12-aryl or C1- to C4-alkyl, preferably phenyl or methyl, in particular for methyl, Ystands for a single bond, SO2-, -S-, -CO-, -O-, C1- to C6-alkylene, C2- to C5-alkylidene, C6- to C12-arylene, which can optionally be condensed with further aromaticrings containing hetero atoms, or for a C5- to C6-cycloalkylidene residue, which can besingly or multiply substituted with C1- to C4-alkyl, preferably for a single bond, -O-, iso-propylidene or for a C5-to C6-cycloalkylidene residue, which can be singly or multiplysubstituted with C1- to C4-alkyl,V stands for oxygen, C2- to C6-alkylene or C3- to C6-alkylidene, preferably foroxygen or C3- alkylene,p, q and r mutually independently each stand 0 or 1, if q = 0, W is a single bond, if q = 1 and r = 0 is, W stands for -O-, C2- to C6-alkylene or C3- to C6-alkylidene, preferably for -O- or C3-alkylene,if q = 1 and r = 1, W and V mutually independently stand for C2- to C6-alkyleneor C3- to C6-alkylidene, preferably for C3 alkylene,Z stands for C1- to C6-alkylene, preferably C2-alkylene,o stands for an average number of repeating units from 10 to 500, preferably 10 to 100 and 2024PF30051-Foreign Countries m stands for an average number of repeating units from 1 to 10, preferably 1 to 6, particularly preferably 1.5 to 5. It is also possible to use dihydroxyaryl compounds, in which two or more silox- ane blocks of general formula (1a) are linked via terephthalic acid and / or isophthalic acid under formation of ester groups. Especially preferable are (poly)siloxanes of the formulae (2) and (3) wherein R1 stands for hydrogen, C1- to C4-alkyl, preferably for hydrogen or me-thyl and especially preferably for hydrogen, R2mutually independently stand for aryl or alkyl, preferably for methyl, Xstands for a single bond, -SO2-, -CO-, -O-, -S-, C1- to C6-alkylene, C2- to C5-alkylidene or for C6- to C12-arylene, which can optionally be condensed with further ar-omatic rings containing hetero atoms, Xstands for a single bond, -SO2-, -CO-, -O-, -S-, C1- to C6-alkylene, C2- to C5-alkylidene, C5- to C12-cycloalkylidene or for C6- to C12-arylene, which can optionally becondensed with further aromatic rings containing hetero atoms, Xpreferably stands for a single bond, isopropylidene, C5- to C12-cycloalkylideneor oxygen, and especially preferably stands for isopropylidene, n means an average number from 10 to 400, preferably 10 and 100, especially preferably 15 to 50 and m stands for an average number from 1 to 10, preferably 1 to 6 and especially preferably from 1.5 to 5. Also preferably the siloxane block can be derived from one of the following structures: 2024PF30051-Foreign Countries wherein a in formulae (IV), (V) und (VI) means an average number from 10 to 400, preferably from 10 to 100 and especially preferably from 15 to 50. It is equally preferable, that at least two of the same or different siloxane blocks of the general formulae (IV), (V) or (VI) are linked via terephthalic acid and / isophthalic acid under formation of ester groups. It is also preferable, if p = 0 in formula (1a), V stands for C3-alkylene, if r = 1, Z stands for C2-alkylene, R8and R9stand for methyl, if q = 1, W stands for C3-alkylene, if m = 1, R5 stands for hydrogen or C1- to C4-alkyl, preferably for hydrogen ormethyl, R6 and R7 mutually independently stand for C1- to C4-alkyl, preferably methyl,and o stands for 10 to 500. Copolycarbonates with monomer units of the general formula (1a), in particular with bisphenol A, and in particular the production of those copolycarbonates are de- scribed in WO 2015 / 052106 A2. As examples of aromatic polycarbonate suitable for the present invention, men- tion can be made of those produced from bisphenol A and phosgene, and sold under the trade name Makrolon®2400, Makrolon®2600, Makrolon®2800, Makrolon®3100 by Covestro Co., Ltd. Advantageously, the virgin aromatic polycarbonate is present in the polycar-bonate composition according to the present invention in an amount ranging from 0wt. % to 5 wt. %, preferably from 0 wt. % to 4 wt. %, relative to the total weight of thepolycarbonate composition. 2024PF30051-Foreign Countries Component B The polycarbonate composition according to the present invention comprises apost-consumer recycled (PCR) linear aromatic polycarbonate as component B.The post-consumer recycled linear aromatic polycarbonate used in the presentinvention can be obtained from the used parts made of linear aromatic polycarbonatethrough a mechanical recycling process which includes the following steps: collection and sorting, shattering, washing, screening, blending, compounding and pelletizing. Preferably, the post-consumer recycled polycarbonate is recycled polycar- bonate based on bisphenol A. The properties of the suitable post-consumer recycled polycarbonates might beas follows: Properties Test Methods UnitsMVR (300 °C / 1.2 kg) ISO 1133 cm3 / 10 min 10.0 –20.0Izod notched impact strength ISO 180 / A kJ / m2 min. 45(23 °C, 3 mm) Vicat VST / B120 ISO 306 °C min. 142Advantageously, the post-consumer recycled linear aromatic polycarbonate ispresent in the polycarbonate composition according to the present invention in anamount ranging from 63 wt.% to 74 wt.%, preferably from 65 wt. % to 72 wt. %, rela-tive to the total weight of the polycarbonate composition.Component C The polycarbonate composition according to the present invention comprises asurface treated talc as component C.Preferably, the talc of the present invention has a median particle diameter D50of from 0.5 to 7 μm, preferably from 1 to 5 μm.As used herein, "Median particle diameter D50" means the particle size towhich 50% of the cumulative particle size distribution percentage of a sample corre-sponds, which can be measured by sedimentation analysis according to ISO 13317-3(version 2001-03). The surface treated talc can be commercially available or prepared by a surface treatment with a surface treatment agent. The surface treatment agent for the surface treated talc suitable for the compo- sition of the present invention is not particularly limited. Preferably, the surface treatment agent for the surface treated talc is a silane coupling agent. 2024PF30051-Foreign Countries More preferably, the surface treatment agent for the surface treated talc is an alkylsilane coupling agent, such as hexadecyltrimethoxysilane or methacryloxy propyl tri-methoxyl silane. Advantageously, the surface treated talc is present in the polycarbonate com-position according to the present invention in an amount ranging from 13 wt.% to 18wt.%, preferably from 14 wt.% to 17 wt.%, relative to the total weight of the polycar-bonate composition. Component D The polycarbonate composition according to the present invention comprises aphosphorous-containing flame retardant as component D.For the purpose of the present invention, the phosphorus-containing flame re-tardant is preferably selected from the group consisting of mono- and oligo-phosphates and phosphonates and phosphonate amines, or a mixture of one or morethereof. Preferred mono- and oligo-phosphates or phosphonates are phosphorus com-pounds of the general formula (A) in which R1, R2, R3 and R4 are, independently from one another, individually optionallyhalogenated C1 to C8-alkyl, or C5 to C6 cycloalkyl, C6 to C20 aryl, or C7 to C12 aralkyl, in-dividually optionally substituted by alkyl, preferably C1 to C4-alkyl, and / or by halogen,preferably by chlorine or bromine, wherein N = 1 to 30, n independently of one anoth-er, denotes 0 or 1. Preferably, R1, R2, R3 and R4 are, independently from each other, C1 to C4 alkyl,phenyl, naphthyl or phenyl-C1to C4alkyl. The aromatic radicals R1, R2, R3and R4can in turn have substituents which are substituted by halogen radicals and / or by alkyl, pref- erably by chlorine, bromine and / or C1to C4alkyl. Particularly preferred aromatic moie- 2024PF30051-Foreign Countries ties are tolyl, phenyl, xylyl, propylphenyl and butylphenyl, as well as their correspondingbrominated and chlorinated derivatives.Most preferably, bisphenol A-based oligomeric phosphates according to for- mula (B) are used as component D: wherein N = 1.0 to 3.0, preferably 1.05 to 2.0, more preferably 1.05 to 1.6, even more preferably 1.0 to 1.2, in particular N = 1.1. Phosphorous-containing flame retardant are known (cf. e.g., EP 0363608 A1,EP 0640655 A2) or can be analogously prepared according to the known methods(e.g., Ullmanns Enzyklopädie der technischen Chemie [Ullmann's encyclopaedia of in-dustrial chemistry], vol. 18, p. 301 ff. 1979; Houben-Weyl, Methoden der organischen Chemie [Methods of organic chemistry], vol. 12 / 1, p. 43; Beilstein vol. 6, p. 177). Advantageously, the phosphorous-containing flame retardant is present in thepolycarbonate composition according to the present invention in an amount rangingfrom 8 wt.% to 14 wt.%, preferably from 8 wt.% to 13 wt.%, relative to the total weightof the polycarbonate composition. Component E1 The polycarbonate composition according to the present invention comprisesethylene-(meth)acrylate copolymer as component E1.Preferably, the ethylene-(meth)acrylate copolymer is selected from ethylene-alkyl (meth)acrylate copolymers of the formula (XI), (XI), wherein R1is methyl or hydrogen, R2is hydrogen or a C1-C12alkyl, preferably methyl, ethyl, propyl, isopropyl, butyl, sec-butyl, tert-butyl, isobutyl, hexyl, isoamyl, or tert-amyl, each of x and y is an independent degree of polymerization, and 2024PF30051-Foreign Countries n is an integer >= 1. x and y are independently from each other, being an integer. The ratios of the degrees of polymerization x and y are preferably in the range x:y = from 300:1 to 10:90. In some embodiment, x and y are independently from each other, being from 10 to 10,000. In some embodiment, x and y are independently from each other, being from 50 to 5,000. The ethylene-alkyl (meth)acrylate copolymer can be a random, block or multi- block copolymer or a mixture of the said structures. In one preferred embodiment, branched and unbranched ethylene-alkyl (meth)acrylate copolymer, particularly linear ethylene-alkyl (meth)acrylate copolymer, is used. The ethylene-alkyl (meth)acrylate copolymer is preferably selected from eth-ylene acrylate copolymers. More preferably, ethylene-methyl acrylate copolymer (EMA), for example,Elvaloy®AC1820 from Dupont, is one of impact modifiers. Preferably, the ethylene-methyl acrylate copolymer has a methyl acrylate con-tent between 5 wt.% and 40 wt.%, preferably between 10 wt.% and 30 wt.%.Advantageously, the ethylene-(meth)acrylate copolymer is present in the poly-carbonate composition according to the present invention in an amount ranging from1 wt.% to 5 wt.%, preferably from 1 wt.% to 3 wt.%, relative to the total weight of thepolycarbonate composition. Component E2 The polycarbonate composition according to the present invention comprisesacrylonitrile-butadiene-styrene and / or polysilsesquioxane as component E2.Acrylonitrile-butadiene-styrene Preferably, acrylonitrile-butadiene-styrene (ABS) used in the present inventioncomprises 5 wt.% to 95 wt.%, preferably 8 wt.% to 90 wt.%, in particular 20 wt.% to 85 wt.% of units derived from acrylonitrile and styrene, and 95 wt.% to 5 wt.%, preferably 92 wt.% to 10 wt.%, in particular 80 wt.% to 15 wt.% of units derived from butadiene, based on the weight of acrylonitrile-butadiene-styrene. More preferably, acrylonitrile-butadiene-styrene (ABS) comprises 15 wt.% to 35wt.%, of units derived from acrylonitrile, 40 wt.% to 60 wt.% of units derived from sty-rene, and 5 wt.% to 30 wt.% of units derived butadiene, based on the weight of acrylo-nitrile-butadiene-styrene. 2024PF30051-Foreign Countries As commercial products of acrylonitrile-butadiene-styrene can be used in the present invention, mention can be made to ABS 8391 available from SINOPEC Shang- hai Gaoqiao Company having a polybutadiene rubber content of 5-30 wt.%, styrene content of 40-60 wt%, and acrylonitrile content of 15-35 wt%, and ABS HRG powder P60 available from Styrolution, produced by emulsion polymerisation of 42-45 wt. %, based on the ABS polymer, of a mixture of 27 wt. % acrylonitrile and 73 wt. % styrene in the presence of 55-58 wt. %, based on the ABS polymer, of a crosslinked polybuta- diene rubber (the average particle diameter d50-0.3 µm). Polysilsesquioxane The polysilsesquioxane, as used herein, has a trifunctional siloxane unit repre- sented by RSiO1.5(R is hydrogen or a monovalent organic group) (hereinafter, it may be referred to as a “T unit”), and contains the unit in an amount of 90% by mol or more, preferably of 95% by mol or more, more preferably of 100% by mol of the total siloxane units (M unit, D unit, T unit, Q unit). Meanwhile, the M unit represents a monofunctional siloxane unit represented by R3SiO0.5(R is hydrogen or a monovalent organic group), the D unit represents a bi- functional siloxane unit represented by R2SiO1.0(R is hydrogen or a monovalent organic group), and the Q unit represents a tetrafunctional siloxane unit represented by SiO2.0. The polysilsesquioxane may contain an M unit, in addition to the T unit. Examples of R bonded to the polysilsesquioxane include hydrogen, C1-C12alkyl, C2-C12alkenyl, C1-C12alkoxy, C1-C12acyl, C3-C8cycloalkyl, and phenyl. Preferably, R isselected from hydrogen, C1-C6 alkyl, C1-C6 alkenyl, C1-C6 alkoxy, and phenyl. More pref-erably, R is selected from alkyl groups having 1 to 6 carbon atoms such as a methyl group, an ethyl group, a propyl group, a butyl group, and a hexyl group. Of those, as the organic group R, a methyl group is preferable, for the purpose of the present in- vention. Preferably, polymethylsilsesquioxane is used as the polysilsesquioxane, alone or in combination with other polysilsesquioxanes, particularly preferred alone. Preferable polysilsesquioxanes as described above can be produced by a pub- licly known method. For example, as described in JP-A-01-217039, JP-A-5-125187 or JP- A-6-263875, the polysilsesquioxane is obtained by hydrolyzing organosilane under an acidic condition, adding and mixing an alkali aqueous solution to aqueous or aque- ous / organic solvent of organosilanetriol, and leaving the product in a static state to thereby polycondensate the organosilanetriol. As examples of commercial products of polysilsesquioxanes, mention can bemade of polymethylsilsesquioxane sold under the trade name Ganzpearl SI-020 byGANZ CHEMICAL CO., LTD and under the trade name ABC E+308 by ABC NANOTECH 2024PF30051-Foreign Countries CO., LTD. Advantageously, the acrylonitrile-butadiene-styrene and / or polysilsesquioxaneis present in the polycarbonate composition according to the present invention in anamount ranging from 1 wt.% to 5 wt.%, preferably from 2 wt.% to 5 wt.%, relative tothe total weight of the polycarbonate composition. Advantageously, the total content of component E1 and component E2 presentin the polycarbonate composition according to the present invention in a range offrom 3 wt.% to 8 wt.%, preferably from 3 wt.% to 6 wt.%, relative to the total weight ofthe polycarbonate composition. Component F The polycarbonate composition according to the present invention comprises an anti-dripping agent as component F. Preferably, the anti-dripping agent used is selected from fluorinated polyolefins. The fluorinated polyolefins are known (see "Vinyl and Related Polymers" by Schildknecht, John Wiley &Sons, Inc., New York, 1962, pages 484-494; "Fluoropoly- mers" by Wall, Wiley-Interscience, John Wiley &Sons, Inc., New York, Volume 13, 1970, pages 623-654; "Modern Plastics Encyclopedia" , 1970-1971, Volume 47, No. 10 A, Oc- tober 1970, McGraw-Hill, Inc., New York, pages 134 and 774; "Modern Plastics Encyclo- paedia" , 1975-1976, October 1975, Volume 52, No. 10 A, McGraw-Hill, Inc., New York, pages 27, 28 and 472 and US-PS 3671487, 3723373 and 3838092) . Preferably, the anti-dripping agent is selected from polytetrafluoroethylene, polyvinylidene fluoride, tetrafluoroethylene / hexafluoropropylene copolymer and eth- ylene / tetrafluoroethylene copolymer. More preferably, polytetrafluoroethylene (PTFE) is used as anti-dripping agent. As an example of commercial products of polytetrafluoroethylene, mention can be made to those sold under the trade name Teflon®by DuPont. A master batch of polytetrafluoroethylene and styrene-acrylonitrile (SAN) in a weight ratio of 1:1, for example, ADS 5000 available from Chemical Innovation Co., Ltd., and POLYB FS-200 available from Han Nanotech Co., Ltd, can also be used. The anti-dripping agent is present in the polycarbonate composition accordingto the present invention in an amount ranging from 0.1 wt.% to 1.0 wt.%, preferablyfrom 0.15 wt.% to 0.8 wt.%, relative to the total weight of the polycarbonate composi-tion. Other components 2024PF30051-Foreign Countries In addition to components mentioned above, the polycarbonate composi- tions according to the present invention can optionally comprise one or more addi- tives conventionally used in polycarbonate compositions. Preferably, the additive is selected from (i) heat stabilizers and antioxidants suchas organic phosphites and phosphonites (for example, Irganox® B900); (ii) processingaids; (iii) mold release agents (such as, PETS); (iv) neutralizers (such as citric acid); (v)UV stabilizer and (vi) colorants. The person skilled in the art can select the type of the additives so as not to adversely affect the desired properties of the polycarbonate composition according to the present invention. Advantageously, the total amount of the additives is up to 3 wt. %, preferablyup 2 wt. %, relative to the total weight of the polycarbonate composition accordingto the present invention. In some embodiments, the composition of the present invention consists of components A)-F) and optional additive selected from (i) heat stabilizers and antioxi- dants; (iii) mold release agents; and (iv) neutralizers. In some embodiments, the polycarbonate composition according to the pre- sent invention comprises, relative to the total weight of the composition, A) no more than 5 wt.% of virgin aromatic polycarbonate, B) from 65 wt.% to 72 w.t% of post-consumer recycled (PCR) linear aromatic polycarbonate, C) from 13 wt.% to 18 wt.% of surface treated talc, D) from 8 wt.% to 14 wt.% of a phosphorus-containing flame retardant, E1) from 1 wt.% to 5 wt.% of ethylene-methyl acrylate copolymer, E2) from 1 wt.% to 5 wt.% of acrylonitrile-butadiene-styrene and / or polyme-thylsilsesquioxane, and F) from 0.15 wt.% to 0.8 wt.% of anti-dripping agent,wherein the total content of component E1 and component E2 in the composi-tion is in a range of from 3 wt.% to 6 wt.%.Preparation of the polycarbonate composition The polycarbonate composition according to the present invention can be in the form of, for example, pellets. The polycarbonate composition according to the present invention demon-strates a good processing behaviour and can be prepared by a variety of methods. Forexample, the materials contained in the composition of the present invention are fed 2024PF30051-Foreign Countries into the throat of a twin-screw extruder via a hopper. Alternatively, at least one of the components can be incorporated into the composition by feeding it directly into the extruder at the throat and / or downstream through a side stuffer. Additives can also be compounded into a masterbatch with a desired polymeric resin and fed into the ex- truder. The extruder is generally operated at a temperature higher than that necessary to cause the composition to flow. The extrudate is immediately quenched in a waterbath and pelletized. The pellets can be 0.6 cm long or less as desired. Such pellets canbe used for subsequent molding, shaping or forming. Melt blending methods are preferred due to the availability of melt blending equipment in commercial polymer processing facilities. Illustrative examples of equipment used in such melt processing methods in- clude co-rotating and counter-rotating extruders, single screw extruders, co-kneaders, and various other types of extrusion equipment. The temperature of the melt in the processing is preferably minimized in order to avoid excessive degradation of the polymers. It is often desirable to maintain the melt temperature between 230 ^C and 300 ^C in the molten resin composition, alt- hough higher temperatures can be used provided that the residence time of the resin in the processing equipment is kept short. In some cases, the melting composition exits from a processing equipment such as an extruder through small exit holes in a die. The resulting strands of the molten resin are cooled by passing the strands through a water bath. The cooled strands canbe chopped into small pellets or other suitable shapes for packaging and further han-dling. Shaped articles The polycarbonate compositions according to the present invention can be used, for example for the production of various types of shaped articles. In the second aspect, the present invention also provides a shaped article madefrom a polycarbonate composition according to the first aspect of the present inven-tion. The polycarbonate composition according to the present invention can bemolded into shaped articles such as, housings for electronic device, etc.The shaped article made from the polycarbonate composition according to thepresent invention has a good combination of impact strength, flame retardancy, and UV resistance. 2024PF30051-Foreign Countries Preparation of shaped articles The polycarbonate compositions according to the present invention can be processed into shaped articles by a variety of means such as injection moulding, extru- sion moulding, blow moulding or thermoforming to form shaped articles. In the third aspect, the present invention provides a process for preparing the shaped article made from a composition according to the first aspect of the present invention, comprising injection moulding, extrusion moulding, blow moulding or ther- moforming the polycarbonate composition according to the present invention. During preparing shaped articles with the thermoplastic resin composition ac-cording to this invention, the melting temperature for the molding process preferably is in the range of 250-300°C, more preferably 255-290°C, even more preferably 260-280°C. The mold temperature could be in the range of 40-110 °C, preferably 50-90 °C,and the injection pressure can be in the range of 300-2500 bar, and preferably 500- 2000 bar. Examples The present invention will be illustrated in detail below with reference to the ex- amples below. The examples are only for the purpose of illustration, rather than limit- ing the scope of the present invention. Materials used Component A PC: available from the company Covestro Polymer (China), a linear polycar- bonate based on bisphenol A having a weight average molecular weight (Mw) of 24000 g / mol, as determined by means of Gel Permeation Chromatography (GPC) in methylene chloride at 25oC using a polycarbonate standard. Component B PC-116A: commercially available from the company Ningbo Xurihongyu Tech-nology Co., Ltd, a PCR polycarbonate based on bisphenol A has a MVR in a range of12-16 cm3 / 10 min at 300 oC and 1.2kg loading.Component C Talc-1: Luzenac R7, surface treated talc, available from the company MAGIS talc, median particle diameter D50 measured by Sedigraph method: 1.8 µm. 2024PF30051-Foreign Countries Talc-2: HTPultra5C, without surface treatment, available from IMI FABI S.p.A.,median particle diameter D50 measured by Sedigraph method: 0.65 µm. Component D BDP: bisphenol-A bis(diphenyl phosphate), available from the companyZhejiang Wansheng Science China.Component E1 ELVALOY 1820 AC: ethylene-methyl acrylate copolymer comprising 20% methylacrylate content, available as Elvaloy® AC1820 from the company Dupont China.Component E2 E2-1: P60, ABS, produced by emulsion polymerisation of 42-45 wt. %, based on the ABS polymer, of a mixture of 27 wt. % acrylonitrile and 73 wt. % styrene in the presence of 55-58 wt. %, based on the ABS polymer, of a crosslinked polybutadiene rubber, available as ABS HRG powder P60 from Styrolution. E2-2: XJY 8011, polymethylsilsesquioxane, available from the company Jia Yi New Material. Component F POLYB FS-200: anti-dripping agent, a masterbatch of polytetrafluoroethylene and Styrene-Acrylonitrile (SAN) in a weight ratio of 1:1, available as POLYB FS-200 from Han Nanotech Co., Ltd. Other components PETS: pentaerythritol tetrastearate, a demoulding agent, available from FACI Asia Pacific Pte Ltd. (Singapore). B900: an antioxidant, a mixture of 80% of Irgafos® 168 (tris(2,4-ditert- butylphenyl)phosphite) and 20% of Irganox® 1076 (2,6-ditert-butyl-4-(octa- decanoxycarbonylethyl)phenol, available as Irganox® B900 from BASF (China) Company Limited. Citric acid: from Sinopharm Chemical Reagent Co., (CN).Test methods The physical properties of specimens or granules in the examples were testedas follows. 2024PF30051-Foreign Countries Izod un-notched impact strengthThe Izod un-notched impact strength was measured on specimens with dimen-sions of 80 mm ×10 mm ×4 mm at a temperature of 23°C according to ISO180 / U:2000(4 mm, 5.5J). Tensile modulus The tensile modulus was measured at 1 mm / min on specimens with dimensionsof 80 mm ×10 mm ×4 mm at the temperature of 23 °C according to ISO 527-2: 2012.Flame retardancy The flame retardancy was measured on specimens with a thickness of 1.2 mmaccording to UL94:2015. Melt volume rate (MVR) Unless otherwise specified, the MVR was measured on granules according toISO 1133-1: 2011 at 240 °C and 5 kg loading.It is desired that the composition of the present invention has a melt volumerate (MVR) of no less than 13 cm3 / 10 min, and the molded specimens thereof can haveIzod un-notched impact strength of no less than 65 KJ / m2, tensile modulus of no less than 4200 MPa, and flame retardancy level of V0 at a thickness of 1.2 mm. Invention Examples (IE) 1-3 and Comparative Examples (CE) 1-2The materials listed in Table 1 (the contents are expressed in % by weight rela- tive to the total weight of each composition) were compounded on a twin-screw ex- truder (ZSK-26) (from Coperion, Werner and Pfleiderer) at a speed of rotation of 480rpm, a throughput of 30 kg / h, and a machine barrel temperature of 240oC-260 oC andgranulated. The granules were processed into corresponding testing specimens on an injec-tion moulding machine (from Arburg) with a melting temperature of 270-300 oC and amold temperature of 60-80oC. The physical properties (including izod un-notched impact strength, tensile modulus, flame retardancy, MVR) of the compositions obtained were tested and the results were summarized in Table 1. Table 1 IE1 IE2 IE3 CE1 CE2Component A (PC) 0 0 4 0 0Component B (PC-116A) 71.3 66.9 67.3 71.3 66.9Component C Talc-1 15 15 15 2024PF30051-Foreign Countries Talc-2 15 15Component D (BDP) 8.5 12 8.5 8.5 12Component E1 (ELVALOY 1820 AC) 2 1 2 2 1E2-1 P60 4 4Component E2 E2-2 XJY 8011 2 2 2Component F (PTFE MB) 0.5 0.5 0.5 0.5 0.5PETS 0.5 0.4 0.5 0.5 0.5Citric acid 0.1 0.1 0.1 0.1 0.1B900 0.1 0.1 0.1 0.1 0.1MVR (cm3 / 10min) 17.8 16.8 19.2 15.7 12.7Tensile modulus (MPa) 4380 4510 4380 4620 4660Izod un-notched impact strength (kJ / m2) 94 90 94 55 59Flame retardancy V0 V0 V0 V0 V0It can be seen from Table 1 that compositions of comparative examples 1 and 2comprising talc 5C without surface treatment cannot achieve desired impact strength,composition of comparative example 2 even cannot have a desired flowability.Compositions of invention examples 1-3 can achieve desired flowability, impactstrength, tensile modulus, and flame retardancy. Comparative Examples (CE) 3-5 and Invention Examples (IE) 4-9Similarly, the materials listed in Table 2 (the contents are expressed in % by weight relative to the total weight of each composition) were compounded, the prop- erties of the compositions obtained were tested and the results were summarized in Table 2. Table 2 IE4 IE5 IE6 IE7 IE8 IE9 CE 3 CE4 CE5Component B (PC-116A) 68.4 67.4 67.4 68.8 67.8 65.9 65.9 65.9 65.9Component C(Talc-1) 15 15 15 15 15 15 15 15 15Component D (BDP) 10.5 10.5 10.5 11 11 13 13 13 13Component E1 (ELVALOY 12 1 2 2 1 51820 AC) Compo-P60 4 4 5 4 5nent E2XJY 8011 2 2 5Component F (PTFE MB) 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5PETS 0.4 0.4 0.4 0.5 0.5 0.4 0.4 0.4 0.4Citric acid 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 2024PF30051-Foreign CountriesB900 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1MVR (cm3 / 10min) 15.2 14.1 13.0 22.5 14.6 18.0 22.5 24.1 15.4Tensile modulus (MPa) 4460 4370 4350 4530 4280 4510 4900 4150 4670Izod un-notched impact 102 132 131 67 96 88 35 69 56strength (kJ / m2)Flame retardancy V0 V0 V0 V0 V0 V0 V0 V0 V0It can be seen from Table 2 that compositions of comparative examples 3–5 comprising only one Impact modifier (5 wt.% XJY-8011 in comparative example 3, or 5 wt.% Evaloy 1820 in comparative example 4, or 5 wt.% P60 ABS in comparative exam-ple 5) cannot achieve desired impact strength or desired tensile modulus.Compositions of invention examples 4-9 can achieve desired flowability, impactstrength, tensile modulus, and flame retardancy. Comparative Examples (CE) 6-7 Similarly, the materials listed in Table 3 (the contents are expressed in % byweight relative to the total weight of each composition) were compounded, the prop- erties of the compositions obtained were tested and the results were summarized in Table 3. Table 3 CE6 CE7Component A (PC) 3 0Component B (PC-116A) 66.9 65.4Component C(Talc-1) 15 15Component D (BDP) 12 10.5Component E1 (ELVALOY 1820 AC) 1 1Component E2 (P60) 1 7Component F (PTFE MB) 0.5 0.5PETS 0.4 0.4Citric acid 0.1 0.1B900 0.1 0.1MVR (cm3 / 10min) 16.0 8.4Tensile modulus (MPa) 4630 4340Izod un-notched impact strength (kJ / m2) 48 111Flame retardancy V0 V0 2024PF30051-Foreign Countries It can be seen from Table 3 that composition of comparative example 6 compris-ing Evaloy 1820 and ABS with the total content thereof being 2 wt.% cannot achievedesired impact strength. Composition of comparative example 7 comprising 7 wt.% ABS does not have desired flowability. Comparative Examples (CE) 8-12 Similarly, the materials listed in Table 4 (the contents are expressed in % byweight relative to the total weight of each composition) were compounded, the prop- erties of the compositions obtained were tested and the results were summarized in Table 4. Table 4 CE8 CE9 CE10 CE11 CE12Component A (PC) 0 6 0 5 0Component B (PC-116A) 74.9 65.9 65.9 68.9 65.9Component C (Talc-1) 13 10 20 15 15Component D (BDP) 8 12 10 5 15Component E1 (ELVALOY 1820 AC) 1 1 1 1 1Component E2 (P60) 2 4 2 4 2Component F（PTFE MB） 0.5 0.5 0.5 0.5 0.5PETS 0.4 0.4 0.4 0.4 0.4Citric acid 0.1 0.1 0.1 0.1 0.1B900 0.1 0.1 0.1 0.1 0.1MVR (cm3 / 10min) 9.3 10.0 13.3 5.2 22.5Tensile modulus (MPa) 4190 3800 5300 4080 4740Izod un-notched impact strength (kJ / m2) 97 122 44 137 46Flame retardancy V0 V0 V0 V0 V0It can be seen from Table 4 that composition of comparative example 8 compris-ing 74.9 wt.% of PCR PC does not have desired flowability.Composition of comparative example 9 comprising 10 wt.% of surface treatedtalc cannot achieve desired tensile modulus and desired flowability.Composition of comparative example 10 comprising 20 wt.% of surface treatedtalc cannot achieve desired impact strength.Composition of comparative example 11 comprising 5 wt.% of BDP cannotachieve desired flame retardancy and desired flowability.Composition of comparative example 12 comprising 15 wt.% of BDP cannotachieve desired impact strength.

Claims

2024PF30051-Foreign Countries Claims 1. A polycarbonate composition comprising the following components, relative to the total weight of the composition: A) no more than 5 wt.% of virgin aromatic polycarbonate, B) from 63 wt.% to 74 wt.% of post-consumer recycled (PCR) linear aromaticpolycarbonate, C) from 13 wt.% to 18 wt.% of surface treated talc, D) from 8 wt.% to 14 wt.% of a phosphorus-containing flame retardant, E1) from 1 wt.% to 5 wt.% of ethylene-(meth)acrylate copolymer, E2) from 1 wt.% to 5 wt.% of acrylonitrile-butadiene-styrene and / or pol-ysilsesquioxane, and F) from 0.2 wt.% to 1.0 wt.% of anti-dripping agent, wherein the total content of component E1 and component E2 is in a range of from 3 wt.% to 8 wt.%.

2. The polycarbonate composition according to claim 1, wherein the virgin aro-matic polycarbonate is present in an amount of no more than 3 wt.%, relative to the total weight of the polycarbonate composition.

3. The polycarbonate composition according to claim 1 or 2, wherein the post-consumer recycled linear aromatic polycarbonate is present in an amount rangingfrom 65 wt. % to 72 wt. %, relative to the total weight of the polycarbonatecomposition.

4. The polycarbonate composition according to any of claims 1-3, wherein thesurface treated talc has a median particle diameter D50 of 0.5 to 7 µm, preferably 1 to5 µm.

5. The polycarbonate composition according to any of claims 1-4, wherein thesurface treatment agent for the surface treated talc is a silane coupling agent, prefera- bly an alkyl silane coupling agent.

6. The polycarbonate composition according to any of claims 1-5, wherein theflame retardant is selected from bisphenol A-based oligomeric phosphates according to formula (B):2024PF30051-Foreign Countries wherein N = 1.0 to 3.0, preferably 1.05 to 2.0, more preferably 1.05 to 1.6, even more preferably 1.0 to 1.

2.

7. The polycarbonate composition according to any of claims 1-6, wherein theethylene-(meth)acrylate copolymer is selected from ethylene-alkyl (meth)acrylate co- polymers of the formula (XI),wherein R1is methyl or hydrogen, R2is hydrogen or a C1-C12alkyl, preferably methyl, ethyl, propyl, isopropyl, butyl, sec-butyl, tert-butyl, isobutyl, hexyl, isoamyl, or tert-amyl, each of x and y is an independent degree of polymerization, and n is an integer >= 1. x and y are independently from each other, being an integer.

8. The polycarbonate composition according to any of claims 1-7, wherein theethylene-(meth)acrylate copolymer is ethylene-methyl acrylate copolymer, preferablyhaving a methyl acrylate content between 5 wt.% and 40 wt.%, preferably between 10wt.% and 30 wt.%.

9. The polycarbonate composition according to any of claims 1-8, wherein theacrylonitrile-butadiene-styrene comprises 5 wt.% to 95 wt.%, preferably 8 wt.% to 90 wt.%, in particular 20 wt.% to 85 wt.% of units derived from acrylonitrile and styrene, and 95 wt.% to 5 wt.%, preferably 92 wt.% to 10 wt.%, in particular 80 wt.% to 15 wt.%of units derived from butadiene, based on the weight of acrylonitrile-butadiene-styrene.

10. The polycarbonate composition according to any of claims 1-9, wherein thepolysilsesquioxane contains T unit in an amount of 90% by mol or more, preferably of95% by mol or more, more preferably of 100% by mol of the total siloxane units, wherein T unit is a trifunctional siloxane unit represented by RSiO1.5, R is hydrogen or a monovalent organic group.

11. The polycarbonate composition according to any of claims 1-10, wherein theanti-dripping agent is selected from polytetrafluoroethylene, polyvinylidene fluoride, tetrafluoroethylene / hexafluoropropylene copolymer and ethylene / tetrafluoroethylene copolymer.2024PF30051-Foreign Countries 12. The polycarbonate composition according to any of claims 1-11, furthercomprising one or more additives selected from heat stabilizers, antioxidants; mold re-lease agents; and neutralizers.

13. The polycarbonate composition according to claim 12, wherein the totalamount of the additives is up to 3 wt. %, preferably up 2 wt. %, relative to the totalweight of the polycarbonate composition.

14. The polycarbonate composition according to claim 1, comprising, relative tothe total weight of the composition, A) no more than 5 wt.% of virgin aromatic polycarbonate, B) from 65 wt.% to 72 w.t% of post-consumer recycled (PCR) linear aromatic polycarbonate, C) from 13 wt.% to 18 wt.% of talc treated with a silane coupling agent, D) from 8 wt.% to 14 wt.% of a phosphorus-containing flame retardant of for- mula (B)wherein N = 1.05 to 1.6, E1) from 1 wt.% to 5 wt.% of ethylene-methyl acrylate copolymer, E2) from 1 wt.% to 5 wt.% of acrylonitrile-butadiene-styrene and / or polyme-thylsilsesquioxane, and F) from 0.15 wt.% to 0.8 wt.% of anti-dripping agent, wherein the total content of component E1 and component E2 in the composi-tion is in a range of from 3 wt.% to 6 wt.%.

15. A shaped article made from the composition according to any of claims 1-14.

Images