Flame retardant polycarbonate composition

Abstract

The present invention relates to a polycarbonate composition comprising, based on the total weight of the composition, A) 8% to 65% by weight of a copolycarbonate, B) 30% to 85% by weight of a homopolycarbonate, C) 0.06% to 0.30% by weight of a fluorine-containing metal organic sulfonate, D) 0.8% to 10% by weight of a polysilsesquioxane, E) 0.1% to 0.7% by weight of an anti-drip agent, and F) 0.1% to 5% by weight of a hydrolysis stabilizer. The present invention also relates to a molded article made from this composition. The polycarbonate composition according to the present invention has a good combination of flame retardancy and heat resistance.

Description

[Technical field]

[0001] The present invention relates to flame retardant polycarbonate (PC) compositions and molded articles made therefrom. [Background technology]

[0002] High heat resistant polycarbonate copolymers are important materials for applications where high temperatures are generated or required, typically for processing automobile light reflectors, camera flash lenses, medical containers, hot water cups, etc. However, high heat resistant polycarbonate copolymers are inherently flammable and there is no existing technical solution to make bromine / chlorine free flame retardant grades. This disadvantage has limited their wide application in EEA industries where bromine / chlorine free flame retardants are required.

[0003] Efforts have been made to develop polycarbonate compositions, including high heat resistant polycarbonate copolymers, with good flame retardant resistance that meet the requirements for various applications such as electrical connectors, wave soldering of printed circuit boards (PCBs), medical devices, etc.

[0004] Patent Document 1 discloses a flame-resistant thermoplastic molding material having good stability at high processing temperatures and improved surface appearance, which contains 90 to 99.9 parts of a dihydroxydiphenylalkane-containing polycarbonate copolymer, 0.1 to 5 parts of a flame retardant additive, and 0.01 to 5 parts of an anti-drip agent such as PTFE.

[0005] Patent Document 2 discloses a flame-retardant composition containing, based on 100 parts by weight of A)+B), A) 5 to 99.5 parts by weight of a thermoplastic aromatic polycarbonate containing a TMC structural unit, and B) 0.5 to 95 parts by weight of a phosphorus compound other than a salt of phosphonic acid and a salt of phosphoric acid.

[0006] Polysilsesquioxanes have attracted intense interest from many global chemical companies and triggered extensive research over the past few decades, with most of the research focused on their light-diffusing properties.

[0007] Patent Document 3 discloses a method for achieving good flame resistance, impact resistance, and surface quality by incorporating metal organic sulfonates, fluoropolymers, specified silsesquioxane particles, and specified graft copolymers into polycarbonate resins.

[0008] Patent Document 4 discloses (B) a light-diffusing aromatic polycarbonate resin composition in which specific polyorganosilsesquioxane particles, which have a weight loss of 1 percent at 400°C to 500°C in thermogravimetry (TGA) according to JIS K7120, are used as a light diffusing agent and added to polycarbonate. The light-diffusing aromatic polycarbonate resin composition exhibits high brightness when used in a light diffusion plate for a direct-type backlight.

[0009] Thus, there remains a need for polycarbonate compositions that have a good combination of flame retardancy (e.g., V0 performance at 1.5 mm per UL94-2015) and heat resistance (e.g., Vicat softening temperature of 152° C. or greater) as well as flame retardant stability. [Prior art documents] [Patent documents]

[0010] [Patent Document 1] German Patent No. 4232897 [Patent Document 2] European Patent No. 0410221 [Patent Document 3] U.S. Patent No. 8,927,636 [Patent Document 4] Japanese Patent No. 4890766 Summary of the Invention

[0011] Therefore, one objective of the present application is to provide a polycarbonate composition that has a good combination of flame retardancy (V0 performance at 1.5 mm according to UL94-2015) and heat resistance (Vicat softening temperature of 152°C or higher) as well as flame retardant stability.

[0012] Thus, in a first aspect, the present invention provides a polycarbonate composition comprising, based on the total weight of the composition, the following components A to F: A) 8% to 65% by weight of a copolycarbonate, i) Formula (1): [ka] (In the formula, * indicates the position where formula (1) is attached to the polymer chain, R 1 are each independently hydrogen or C1-C4 alkyl, R 2 are each independently C1-C4 alkyl; n is 0, 1, 2, or 3; ii) Equation (2): [ka] (In the formula, * indicates the position where formula (2) is attached to the polymer chain, R 3 are each independently H, a linear or branched C1-C 10 is alkyl, and R 4 are each independently a linear or branched C1-C 10 alkyl) units; and a copolycarbonate comprising B) a homopolycarbonate containing 30% to 85% by weight of units of formula (2) defined above; C) 0.06% by weight to 0.30% by weight of a fluorine-containing metal organic sulfonate; D) 0.8% by weight to 10% by weight of polysilsesquioxane; E) 0.1% by weight to 0.7% by weight of an anti-drip agent; F) 0.1% to 5% by weight of a hydrolysis stabilizer; wherein the hydrolysis stabilizer is selected from the group consisting of mineral clays; Where: The polycarbonate composition has a weight content of the unit of formula (1) in the polycarbonate composition of 5% by weight to 50% by weight based on the total weight of the composition.

[0013] As used herein, the weight content (C 1 / C / W ) is calculated as follows: C 1 / C / W =(C 1 / CO / M ×M w1 )×C co / c / w / (C 1 / CO / M ×M w1’ +C 2 / CO / M ×M w2 ) (In the formula, C 1 / C / W represents the weight content of the unit of formula (1) in the polycarbonate composition, C 1 / CO / M represents the molar content of units of formula (1) in the copolycarbonate, M w1 represents the molecular weight of the unit of formula (1), expressed in grams per mole, M w1’ represents the total molecular weight of the unit of formula (1) and -C=O-, expressed in grams per mole, C 2 / CO / M represents the molar content of units of formula (2) in the copolycarbonate, M w2 represents the molecular weight of the unit of formula (2), expressed in grams per mole, and C co / c / w represents the weight content of the copolycarbonate in the polycarbonate composition).

[0014] In a second aspect, the present invention provides a molded article made from a polycarbonate composition according to the invention.

[0015] In a third aspect, the present invention provides a method of making the above-mentioned molded article comprising injection molding, extrusion molding, blow molding, or thermoforming a polycarbonate composition according to the present invention.

[0016] The inventors have found that the combination of the copolycarbonate, polysilsesquioxane, fluorine-containing metal organic sulfonate, anti-drip agent, and hydrolysis stabilizer provides a composition according to the invention with a good combination of flame retardancy (V0 performance at 1.5 mm according to UL94-2015), flame stability (8 or more out of 10 batches have the same flame retardancy rating), and heat resistance (Vicat softening temperature of 152°C or higher), even in thin wall conditions, e.g., 1.5 mm thickness, such that the composition can be used in applications requiring high heat resistance and flame retardancy.

[0017] Other subjects, as well as characteristics, aspects and advantages of the present invention will become even more apparent upon reading the following detailed description and examples. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0018] Detailed Description of the Invention Hereinafter, unless otherwise indicated, the boundaries of ranges of values ​​are included within this range, in particular in the expressions "between ... to ..." and "to ...".

[0019] Throughout this application, the term "comprising" should be interpreted to encompass not only all specifically stated features but also any additional unspecified features.

[0020] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. When a definition of a term herein conflicts with a meaning commonly understood by one of ordinary skill in the art to which this invention belongs, the definition set forth herein shall apply.

[0021] Unless otherwise specified, all numbers expressing quantities of ingredients or the like used in the detailed description and claims should be understood to be modified by the term "about."

[0022] Ingredient A According to a first embodiment, the polycarbonate composition according to the invention comprises as component A a copolycarbonate.

[0023] In this application, copolycarbonates are i) Formula (1): [ka] (In the formula, * indicates the position where formula (1) is attached to the polymer chain, R 1 are each independently hydrogen or C1-C4 alkyl, R 2 are each independently C1-C4 alkyl; n is 0, 1, 2, or 3; ii) Equation (2): [ka] (In the formula, * indicates the position where formula (2) is attached to the polymer chain, R 3 are each independently H, a linear or branched C1-C 10 alkyl, preferably H, linear or branched C1-C4 alkyl, and R 4are each independently a linear or branched C1-C 10 alkyl, preferably linear or branched C1-C4 alkyl) units; This refers to polycarbonates containing

[0024] The unit of formula (1) is represented by formula (1'): [ka] (In the formula, R 1 each independently represents hydrogen or C1-C4 alkyl, R 2 each independently represents C1-C4 alkyl; wherein n is 0, 1, 2, or 3).

[0025] Preferably, the unit of formula (1) has the following formula (1a): [ka] (In the formula, * indicates the position where formula (1a) is attached to the polymer chain), i.e. the unit of formula (1) has the formula (1′a): [ka] It is derived from bis(4-hydroxyphenyl)-3,3,5-trimethylcyclohexane (BPTMC), having the formula:

[0026] The unit of formula (2) is formula (2'): [ka] (In the formula, R 3 are each independently H, a linear or branched C1-C 10 represents an alkyl group, R 4 are each independently a linear or branched C1-C 10 The alkyl group may be derived from a diphenol having a substituent (e.g., aryl, aryloxy, arylalkyl).

[0027] Preferably, the unit of formula (2) is represented by the following formula (2a): [ka] (In the formula, * indicates the position where formula (2a) is attached to the polymer chain), i.e. the unit of formula (2) is bisphenol A, i.e. formula (2′a): [ka] It is derived from the diphenol

[0028] Preferably, the copolycarbonate comprises units derived from bis(4-hydroxyphenyl)-3,3,5-trimethylcyclohexane (BPTMC) and bisphenol A.

[0029] Preferably, the copolycarbonate does not contain units derived from diphenols other than the diphenols of formula (1') and the diphenols of formula (2').

[0030] Preferably, the copolycarbonate does not contain units derived from diphenols other than bis(4-hydroxyphenyl)-3,3,5-trimethylcyclohexane (BPTMC) and bisphenol A.

[0031] The diphenols of formula (1') and formula (2') are known and can be prepared by methods known from the literature (e.g., HJ Buysch et al., Ullmann's Encyclopedia of Industrial Chemistry, VCH, New York 1991, 5th Ed., Vol. 19, p. 348).

[0032] Preferably, based on the total number of moles of the units of formula (1) and formula (2), the molar content of the units of formula (1) in the copolycarbonate is 20 mol% to 90 mol%, more preferably 50 mol% to 90 mol%, and the molar content of the units of formula (2) in the copolycarbonate is 10 mol% to 80 mol%, more preferably 10 mol% to 50 mol%.

[0033] The copolycarbonates used in the compositions according to the invention are commercially available or can be prepared by methods known in the art. For example, the copolycarbonates used in the compositions according to the invention can be prepared by an interfacial method. In particular, the diphenols of formula (1') and formula (2') and any branching agent are dissolved in an aqueous alkaline solution and reacted with a carbonate source, such as phosgene, optionally dissolved in a solvent, in a two-phase mixture containing an aqueous alkaline solution, an organic solvent, and a catalyst, preferably an amine compound. The reaction procedure can also be carried out in a multi-step process.

[0034] The process for preparing such copolycarbonates is in principle known as the two-phase interfacial process, for example in H. Schnell, Chemistry and Physics of Polycarbonates, Polymer Reviews, Vol. 9, Interscience Publishers, New York 1964, page 33 et seq., and Polymer Reviews, Vol. 10, "Condensation Polymers by Interfacial and Solution Methods", Paul W. Morgan, Interscience Publishers, New York 1965, Chapter VIII, page 325, so that the underlying conditions are well known to the person skilled in the art.

[0035] The concentration of the diphenol in the alkaline aqueous solution is 2% by weight to 25% by weight, preferably 2% by weight to 20% by weight, more preferably 2% by weight to 18% by weight, and even more preferably 3% by weight to 15% by weight. The alkaline aqueous solution is made of water in which an alkali metal or alkaline earth metal hydroxide is dissolved. Sodium hydroxide and potassium hydroxide are preferred.

[0036] The concentration of the amine compound is 0.1 mol % to 10 mol %, preferably 0.2 mol % to 8 mol %, particularly preferably 0.3 mol % to 6 mol %, and more particularly preferably 0.4 mol % to 5 mol %, based on the molar amount of the diphenol used.

[0037] The carbonate source is phosgene, diphosgene, or triphosgene, preferably phosgene. When phosgene is used, the solvent may be optionally omitted and the phosgene may be passed directly into the reaction mixture.

[0038] Tertiary amines such as triethylamine or N-alkylpiperidine may be used as catalysts. Suitable catalysts are trialkylamines and 4-(dimethylamino)pyridine. Triethylamine, tripropylamine, triisopropylamine, tributylamine, triisobutylamine, N-methylpiperidine, N-ethylpiperidine, and N-propylpiperidine are particularly suitable.

[0039] Suitable organic solvents are halogenated hydrocarbons such as methylene chloride, chlorobenzene, dichlorobenzene, trichlorobenzene or mixtures thereof, or aromatic hydrocarbons such as toluene or xylene. The reaction temperature can be from -5°C to 100°C, preferably from 0°C to 80°C, particularly preferably from 10°C to 70°C, very particularly preferably from 10°C to 60°C. It is also possible to prepare copolycarbonates by the melt transesterification method, in which diphenols are reacted with diaryl carbonates, generally diphenyl carbonate, in the melt in the presence of catalysts such as alkali metal salts, ammonium compounds or phosphonium compounds.

[0040] The melt transesterification process is described, for example, in Encyclopedia 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 DE-A-1 031 512.

[0041] In the transesterification process, the aromatic dihydroxy compounds already described in the phase boundary process are transesterified with carbonic acid diesters in the melt using suitable catalysts and optionally further additives. The reaction of aromatic dihydroxy compounds with carbonic acid diesters to obtain copolycarbonates can be carried out batchwise or preferably continuously, for example in stirred tanks, thin film evaporators, falling film evaporators, stirred tank cascades, extruders, kneaders, simple disc reactors and high-viscosity disc reactors.

[0042] Preferably, the copolycarbonate is selected from block copolycarbonates and random copolycarbonates, more preferably, the copolycarbonate is selected from random copolycarbonates.

[0043] Advantageously, the copolycarbonates have a weight average molecular weight (Mw) ranging from 16000 g / mol to 40000 g / mol, preferably from 17000 g / mol to 32000 g / mol, determined by gel permeation chromatography (GPC) at 25° C. in methylene chloride with a UV-IR detector using polycarbonate standards.

[0044] An example of a commercially available copolycarbonate suitable for the composition according to the invention is the product sold under the name APEC™ by Covestro Polymer Co., Ltd. (China), which is a polycarbonate copolymer made from the copolymerization of carbonyl chloride with bisphenol A (BPA) and 3,3,5-trimethyl-1,1-bis(4-hydroxyphenyl)cyclohexane (BPTMC).

[0045] The copolycarbonate is present in the polycarbonate composition according to the invention in an amount ranging from 8% to 65% by weight, more preferably from 10% to 60% by weight, even more preferably from 40% to 60% by weight, relative to the total weight of the composition according to the invention.

[0046] Component B According to a first embodiment, the polycarbonate composition according to the invention comprises, as component B, a homopolycarbonate comprising units of formula (2). In the present application, homopolycarbonate refers to a polycarbonate comprising units of formula (2) as defined above.

[0047] The unit of formula (2) is formula (2'): [ka] (In the formula, R 3 are each independently H, a linear or branched C1-C 10 alkyl, preferably linear or branched C1-C6-alkyl, more preferably linear or branched C1-C4-alkyl, even more preferably H or methyl, and R 4 are each independently a linear or branched C1-C 10 alkyl, preferably linear or branched C1-C6 alkyl, more preferably linear or branched C1-C4 alkyl, even more preferably methyl).

[0048] Preferably, the unit of formula (2) is of formula (2'a): [ka] It is derived from the diphenol, namely bisphenol A.

[0049] The homopolycarbonates used in the composition according to the present invention are commercially available or can be prepared by methods known in the art. For example, the homopolycarbonates can be prepared by referring to the preparation methods described for component A.

[0050] Preferably, the homopolycarbonate has a weight average molecular weight (Mw) in the range of 22000 g / mol to 30000 g / mol, in the range of 24000 g / mol to 28000 g / mol, as determined by gel permeation chromatography (GPC) at 25° C. in methylene chloride with a UV-IR detector using polycarbonate standards.

[0051] Commercially available homopolycarbonates suitable for use in the compositions according to the invention include Makrolon™ 2400, Makrolon™ 2600, and Makrolon™ 2800 sold by Covestro Polymer Co., Ltd. (China).

[0052] The homopolycarbonate is present in the polycarbonate composition according to the invention in an amount ranging from 30% to 85% by weight, more preferably from 33% to 83% by weight, relative to the total weight of the composition according to the invention.

[0053] Component C The polycarbonate composition according to the present invention comprises as component C a fluorine-containing metal organic sulfonate.

[0054] The incorporation of the fluorine-containing metal organic sulfonate enhances the flame resistance of the polycarbonate composition of the present invention.

[0055] Examples of metals contained in the fluorine-containing metal organic sulfonate include alkali metals such as lithium (Li), sodium (Na), potassium (K), rubidium (Rb), and cesium (Cs), alkaline earth metals such as magnesium (Mg), calcium (Ca), strontium (Sr), and barium (Ba), as well as aluminum (Al), titanium (Ti), iron (Fe), cobalt (Co), nickel (Ni), copper (Cu), zinc (Zn), zirconium (Zr), molybdenum (Mo), etc. Among these, alkali metals or alkaline earth metals are preferred.

[0056] Preferably, the metal salt of the fluorine-containing organic sulfonic acid contained is selected from the group consisting of alkali metal salts and alkaline earth metal salts, and more preferably is an alkali metal salt, where the metal is preferably sodium, potassium, or cesium. Examples of metal organic sulfonates include lithium (Li) fluorine-containing organic sulfonate, sodium (Na) fluorine-containing organic sulfonate, potassium (K) fluorine-containing organic sulfonate, rubidium (Rb) fluorine-containing organic sulfonate, cesium (Cs) fluorine-containing organic sulfonate, magnesium (Mg) fluorine-containing organic sulfonate, calcium (Ca) fluorine-containing organic sulfonate, strontium (Sr) fluorine-containing organic sulfonate, barium (Ba) fluorine-containing organic sulfonate, etc. Among these, alkali metal fluorine-containing organic sulfonate including sodium (Na) fluorine-containing organic sulfonate, potassium (K) fluorine-containing organic sulfonate compound, cesium (Cs) fluorine-containing organic sulfonate compound, etc. are particularly preferred.

[0057] Preferred examples of the metal salt of a fluorine-containing organic sulfonic acid include metal salts of a fluorine-containing aliphatic sulfonic acid and metal salts of a fluorine-containing aliphatic sulfonimide.

[0058] Specific examples of preferred fluorine-containing metal organic sulfonates include the following: i) Metal salts of fluorine-containing aliphatic sulfonic acids, such as: Alkali metal salts of fluorine-containing aliphatic sulfonic acids having at least one C-F bond in the molecule, such as potassium perfluorobutanesulfonate, lithium perfluorobutanesulfonate, sodium perfluorobutanesulfonate, cesium perfluorobutanesulfonate, lithium trifluoromethanesulfonate, sodium trifluoromethanesulfonate, potassium trifluoromethanesulfonate, potassium perfluoroethanesulfonate, and potassium perfluoropropanesulfonate; Alkaline earth metal salts of fluorine-containing aliphatic sulfonic acids having at least one C-F bond in the molecule, such as magnesium perfluorobutanesulfonate, calcium perfluorobutanesulfonate, barium perfluorobutanesulfonate, magnesium trifluoromethanesulfonate, calcium trifluoromethanesulfonate, and barium trifluoromethanesulfonate; alkali metal salts of fluorine-containing aliphatic disulfonic acids having at least one C-F bond in the molecule, such as disodium perfluoromethane disulfonate, dipotassium perfluoromethane disulfonate, sodium perfluoroethane disulfonate, dipotassium perfluoroethane disulfonate, dipotassium perfluoropropane disulfonate, dipotassium perfluoroisopropane disulfonate, disodium perfluorobutane disulfonate, potassium perfluorobutane disulfonate, dipotassium perfluorobutane disulfonate, and dipotassium perfluorooctane disulfonate; ii) Metal salts of fluorine-containing aliphatic sulfonimides, such as: Alkali metal salts of fluorine-containing aliphatic disulfonimides having at least one C—F bond in the molecule, for example, lithium bis(perfluoropropanesulfonyl)imide, sodium bis(perfluoropropanesulfonyl)imide, potassium bis(perfluoropropanesulfonyl)imide, lithium bis(perfluorobutanesulfonyl)imide, sodium bis(perfluorobutanesulfonyl)imide, potassium bis(perfluorobutanesulfonyl)imide, potassium trifluoromethane (pentafluoroethane) sulfonyl imide, sodium trifluoromethane (nonafluorobutane) sulfonyl imide, potassium trifluoromethane (nonafluorobutane) sulfonyl imide, trifluoromethane, etc. Alkali metal salts of cyclic fluorine-containing aliphatic sulfonimides having at least one C-F bond in the molecule, such as lithium cyclohexafluoropropane-1,3-bis(sulfonyl)imide, sodium cyclohexafluoropropane-1,3-bis(sulfonyl)imide, and potassium cyclohexafluoropropane-1,3-bis(sulfonyl)imide.

[0059] Among these, metal salts of fluorine-containing aliphatic sulfonic acids are more preferred.

[0060] As the metal salt of a fluorine-containing aliphatic sulfonic acid, an alkali metal salt of a fluorine-containing aliphatic sulfonic acid having at least one C—F bond in the molecule is preferable, and an alkali metal salt of a perfluoroalkanesulfonic acid is particularly preferable. Specifically, potassium perfluorobutanesulfonate and the like are preferable.

[0061] An example of a commercially available metal salt of a fluorine-containing organic sulfonic acid is potassium perfluorobutanesulfonate sold under the trade name Bayowet C4 by LANXESS AG (Germany).

[0062] The metal salt of a fluorine-containing organic sulfonic acid is present in the polycarbonate composition according to the present invention in an amount ranging from 0.06% to 0.30% by weight, preferably from 0.1% to 0.2% by weight, based on the total weight of the composition.

[0063] The addition of such metal salts of fluorine-containing organic sulfonic acids does not adversely affect the mechanical properties of the polycarbonate resin, such as impact resistance, heat resistance, and good electrical properties.

[0064] Component D The polycarbonate composition according to the invention comprises as component D at least one polysilsesquioxane.

[0065] As used herein, polysilsesquioxane refers to RSiO 1.5 (R is hydrogen or a monovalent organic group), and the amount of these units is 90 mol % or more, preferably 95 mol % or more, and more preferably 100 mol % of all siloxane units (M units, D units, T units, Q units).

[0066] On the other hand, the M unit is RSiO 0.5 (R is hydrogen or a monovalent organic group), and the D unit is RSiO 1.0 (R is hydrogen or a monovalent organic group), and the Q unit is SiO 2.0 represents a tetrafunctional siloxane unit represented by:

[0067] The polysilsesquioxane may contain M units in addition to T units.

[0068] Examples of R bonded to polysilsesquioxane include hydrogen, C1-C 12 Alkyl, C2-C 12 Alkenyl, C1-C 12 Alkoxy, C1-C 12Examples of the organic group R include acyl, C3-C8 cycloalkyl, and phenyl. Preferably, R is selected from hydrogen, C1-C6 alkyl, C1-C6 alkenyl, C1-C6 alkoxy, and phenyl. More preferably, R is selected from alkyl groups having 1 to 6 carbon atoms, such as methyl, ethyl, propyl, butyl, and hexyl. Among these, for the purpose of the present invention, the organic group R is preferably a methyl group. Preferably, as the polysilsesquioxane, polymethylsilsesquioxane is used alone or in combination with other polysilsesquioxanes, and particularly preferably alone.

[0069] The above-mentioned preferred polysilsesquioxane can be produced by a known method. For example, as described in JP-A-01-217039, JP-A-5-125187, or JP-A-6-263875, organosilane is hydrolyzed under acidic conditions, an aqueous alkali solution is added to and mixed with an aqueous or aqueous / organic solvent of organosilane triol, and the product is kept in a stationary state to polycondense the organosilane triol, thereby obtaining polysilsesquioxane.

[0070] Examples of commercially available polysilsesquioxane products include polymethylsilsesquioxane sold by GANZ CHEMICAL CO., LTD under the trade name Ganzpearl SI-020, and polymethylsilsesquioxane sold by ABC NANOTECH CO., LTD under the trade name ABC E+308.

[0071] Advantageously, the polysilsesquioxane is present in the polycarbonate composition according to the invention in an amount ranging from 0.8% to 10% by weight, preferably from 1% to 9% by weight, relative to the total weight of the polycarbonate composition.

[0072] Component E The polycarbonate composition according to the invention comprises as component E at least one anti-drip agent.

[0073] Preferably, the at least one anti-drip agent used is selected from the group consisting of fluorinated polyolefins.

[0074] Fluorinated polyolefins are known (Schildknecht, Vinyl and Related Polymers, John Wiley & Sons, Inc., New York, 1962, pp. 484-494; Wall, Fluoropolymers, Wiley-Interscience, John Wiley & Sons, Inc., New York, Vol. 13, 1970, pp. 623-654; Modern Plastics Encyclopedia, Vol. 47, No. 10A, 1970-1971, October 1970; McGraw-Hill, Inc., New York, pp. 134 and 774; Modern Plastics Encyclopedia, Vol. 52, No. 10A, 1975-1976, October 1975; McGraw-Hill, Inc., New York, pages 27, 28, and 472, and U.S. Pat. No. 3,671,487, U.S. Pat. No. 3,723,373, and U.S. Pat.

[0075] Preferably, the anti-drip agent is selected from the group consisting of polytetrafluoroethylene, polyvinylidene fluoride, tetrafluoroethylene / hexafluoropropylene copolymer, and ethylene / tetrafluoroethylene copolymer. More preferably, polytetrafluoroethylene (PTFE) is used as the anti-drip agent.

[0076] Polytetrafluoroethylene can be mixed in an aqueous medium by known processes, for example at a flow rate of 7 kg / cm 2 ~71kg / cm 2and at temperatures between 0° C. and 200° C., preferably between 20° C. and 100° C., using a free radical forming catalyst, such as sodium peroxodisulfate, potassium peroxodisulfate, or ammonium peroxodisulfate; see, for example, U.S. Pat. App. Pub. No. 2,393,967 for further details.

[0077] Preferably, the fluorinated polyolefin has a glass transition temperature above -30°C, generally above 100°C, a fluorine content of preferably 65% ​​to 76% by weight, in particular 70% to 76% by weight (based on 100% by weight of the fluorinated polyolefin), an average particle size d of 0.05 μm to 1000 μm, preferably 0.08 μm to 20 μm. 50 has.

[0078] For the purposes of this invention, the particle size d 50 The average value indicates a particle size such that 50 percent by weight of the material has a particle size larger than the average value and 50 percent by weight has a particle size smaller than the average value. 50 The average size can be determined via methods known to those skilled in the art, for example, the d 50 The values ​​are measured via light scattering techniques (dynamic or laser) using respective instruments available, for example, from Malvern (e.g., Mastersizer™ Micro or Mastersizer™ 3000) or Coulter (e.g., LS 230™), in particular as described in the methods of ISO 13320-1:2020, EP 1279694 and WO 2014 / 037375. Laser light scattering, based on light diffraction on particles, is a suitable technique for determining particle size distribution that can be applied to this type of powder. In particular, the analysis can be carried out on dry powders (for example, using an LS 13320™ instrument from Coulter) or on powders suspended in an aqueous solution of a suitable dispersant (a suitable instrument is the LS 230™ from Coulter).

[0079] Preferably, the fluorinated polyolefin has a viscosity of 1.2 g / cm as measured according to ASTM D1895:2017. 3 ~2.3g / cm 3 has a density of

[0080] More preferably, the fluorinated polyolefin used according to the present invention has an average particle size of 0.05 μm to 20 μm, preferably 0.08 μm to 10 μm, and a molecular weight of 1.2 g / cm 3 ~1.9g / cm 3 has a density of

[0081] Suitable fluorinated polyolefins that can be used in powder form have an average particle size of 100 μm to 1000 μm and a viscosity of 2.0 g / cm 3 ~2.3g / cm 3 It is a tetrafluoroethylene polymer having a density of

[0082] An example of a commercially available polytetrafluoroethylene product is that sold by DuPont under the trade name Teflon. Masterbatches of polytetrafluoroethylene and styrene-acrylonitrile (SAN) in a 1:1 weight ratio, such as ADS 5000 available from Chemical Innovation Co., Ltd. and POLYB FS-200 available from Han Nanotech Co., Ltd, can also be used.

[0083] The anti-drip agent is present in the polycarbonate composition according to the present invention in an amount ranging from 0.1% to 0.7% by weight, preferably from 0.2% to 0.6% by weight, more preferably from 0.2% to 0.5% by weight, relative to the total weight of the polycarbonate composition.

[0084] Component F The polycarbonate composition according to the invention comprises as component F at least one hydrolysis stabilizer, where the hydrolysis stabilizer is selected from the group consisting of mineral clays.

[0085] "Hydrolytic stabilizers" according to the invention are understood to mean substances which improve the resistance of polycarbonates to hydrolysis.

[0086] Examples of mineral clays include boehmite, gibbsite, diaspore, kaolin (eg, kaolinite, pyrophyllite), smectite (eg, montmorillonite, nontronite, saponite), talc, and the like.

[0087] More preferably, the hydrolysis stabilizer is selected from the group consisting of boehmite, kaolin, talc, citric acid, and combinations thereof. Even more preferably, the hydrolysis stabilizer is boehmite.

[0088] Commercially available products for hydrolysis stabilizers include boehmite sold under the trade name Pural™ 200 by Sasol Germany GmbH, kaolin sold under the trade name Polyfil HG90 by KaMin LLC, talc sold under the trade name HTP™ Ultra 5C by IMIFABI SPA, and citric acid sold under the trade name Citric Acid Anhydrous by Weifang Ensign Industry Co., Ltd.

[0089] The hydrolysis stabilizer is present in the polycarbonate composition according to the invention in an amount ranging from 0.1% to 5% by weight, preferably from 0.1% to 1% by weight, preferably from 0.2% to 0.6% by weight, relative to the total weight of the polycarbonate composition.

[0090] Ingredient G In addition to the above-mentioned components A to F, the polycarbonate composition according to the present invention may optionally contain one or more additional additives in conventional amounts conventionally used in polymer compositions as component G. Such additives are lubricants, mold release agents (e.g., pentaerythritol tetrastearate (PETS), glycerin monostearate (GMS), and carbonates thereof), antioxidants, dyes, pigments, ultraviolet absorbers, impact modifiers (ABS (acrylonitrile-butadiene-styrene), MBS (methyl methacrylate-butadiene-styrene), etc.), and flame retardants other than metal salts of fluorine-containing organic sulfonic acids.

[0091] Those skilled in the art will be able to select the type and amount of additional additives so as not to significantly adversely affect the desired properties of the polycarbonate compositions according to the present invention.

[0092] For example, in some embodiments, compositions according to the present invention include a metal salt of an aromatic sulfonic acid as a flame retardant.

[0093] Preferably, the metal salt of aromatic sulfonic acid is selected from alkali metal salts of aromatic sulfonates having at least one aromatic group in the molecule, such as dipotassium diphenylsulfone-3,3'-disulfonate, potassium diphenylsulfone-3-sulfonate, sodium benzenesulfonate, sodium (poly)styrenesulfonate, sodium paratoluenesulfonate, sodium (branched)dodecylbenzenesulfonate, sodium trichlorobenzenesulfonate, potassium benzenesulfonate, potassium styrenesulfonate, potassium (poly)styrenesulfonate, potassium paratoluenesulfonate, potassium (branched)dodecylbenzenesulfonate, potassium trichlorobenzenesulfonate, cesium benzenesulfonate, cesium (poly)styrenesulfonate, cesium paratoluenesulfonate, cesium (branched)dodecylbenzenesulfonate, and cesium trichlorobenzenesulfonate.

[0094] More preferably, the metal salt of an aromatic sulfonic acid is selected from alkali metal salts of diphenylsulfone sulfonic acid, such as dipotassium diphenylsulfone-3,3'-disulfonate and potassium diphenylsulfone-3-sulfonate.

[0095] A commercially available example of a metal salt of an aromatic sulfonic acid is potassium diphenylsulfone-3-sulfonate sold under the trade name KSS-FR™ by Arichem LLC.

[0096] Advantageously, when present, the metal salt of an aromatic sulfonic acid is present in the polycarbonate composition in an amount less than or equal to 0.5% by weight relative to the total weight of the composition.

[0097] Preferably, the flame retardant polycarbonate composition according to the present invention comprises, based on the total weight of the composition: A) 10% to 60% by weight of a copolycarbonate, i) 50 mol% to 90 mol% of formula (1a): [ka] With units of ii) 10 mol% to 40 mol% of formula (2a): [ka] With units of wherein mol % is calculated based on the total number of moles of units of formula (1a) and units of formula (2a), B) a homopolycarbonate containing 33% by weight to 83% by weight of a unit of formula (2a); C) 0.1% by weight to 0.2% by weight of a fluorine-containing metal organic sulfonate; Here, the fluorine-containing metal organic sulfonate includes at least potassium perfluorobutanesulfonate, and more preferably, the fluorine-containing metal organic sulfonate is potassium perfluorobutanesulfonate; D) 1% by weight to 9% by weight of polysilsesquioxane; Here, the polysilsesquioxane includes polymethylsilsesquioxane, and more preferably, the polysilsesquioxane is polymethylsilsesquioxane; E) 0.2% by weight to 0.6% by weight of an anti-drip agent; Wherein the anti-drip agent includes polytetrafluoroethylene, more preferably the anti-drip agent is polytetrafluoroethylene; F) 0.2% to 0.6% by weight of boehmite; where The weight content of the unit of formula (1a) in the polycarbonate composition is 6.5% by weight to 45% by weight relative to the total weight of the composition.

[0098] Preparation of polycarbonate compositions Polycarbonate compositions according to the present invention can be in the form of, for example, pellets, and can be made by a variety of methods including intimately mixing the materials desired in the composition.

[0099] For example, the materials desired in the composition are first blended in a high speed mixer. Blending can also be accomplished by other low shear processes, including but not limited to hand blending. The blend is then fed through a hopper into the throat of a twin screw extruder. Alternatively, at least one component 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 with the desired polymer resin to obtain a masterbatch and fed into the extruder. The extruder is generally operated at a temperature higher than that required to make the composition flow. The extrudate is immediately quenched in a water bath and pelletized. The pellets can be ¼ inch or less in length as described. Such pellets can be used for subsequent molding, shaping, or forming.

[0100] The melt blending method is preferred due to the availability of melt blending equipment in commercial polymer processing facilities.

[0101] Illustrative examples of equipment used in such melt processing methods include co-rotating and counter-rotating extruders, single screw extruders, co-kneaders, and various other types of extrusion equipment.

[0102] It is preferable to minimize the temperature of the melt during processing to avoid excessive degradation of the polymer. In molten resin compositions, it is often desirable to maintain a melt temperature between 230° C. and 350° C., although higher temperatures can be used if the residence time of the resin in the processing equipment is kept short.

[0103] In some cases, the molten composition exits the processing equipment, such as an extruder, through small exit holes in a die. The resulting strands of molten resin are cooled by passing the strands through a water bath. The cooled strands can be chopped into small pellets for packaging and further handling.

[0104] Molded product The polycarbonate compositions according to the invention can be used, for example, to produce various kinds of molded articles.

[0105] The present invention also provides a molded article made from the polycarbonate composition according to the invention.

[0106] Examples of such molded articles include, for example, housing parts of all kinds, e.g., for household appliances such as juice presses, coffee machines, and mixers, or for medical devices, electrical and electronic components such as conduits, electrical connectors, switches, plugs, and sockets, and body parts or interior trim for commercial vehicles.

[0107] Fabrication of molded products The polycarbonate compositions according to the present invention can be processed into molded articles by a variety of means, such as injection molding, extrusion, blow molding, or thermoforming to form molded articles.

[0108] The present invention provides a method of making a molded article made from a composition according to the present invention, comprising injection molding, extrusion molding, blow molding, or thermoforming a polycarbonate composition according to the present invention.

[0109] The following examples serve to explain the invention in more detail. EXAMPLES

[0110] Materials used Ingredient A CoPC: commercially available from Covestro Polymers (China), 7 cm2 measured at 330°C and 1.2 kg according to ISO 1133: (2011) 3 % bisphenol A units, based on the total amount of bisphenol units, having an MVR of 100 / min and a weight average molecular weight of about 30,000 g / mol, determined by gel permeation chromatography (GPC) in methylene chloride at 25° C. using polycarbonate standards.

[0111] Component B PC: A linear polycarbonate based on bisphenol A, commercially available from Covestro Polymer Co., Ltd. (China), with a weight average molecular weight of about 28000 g / mol as determined by gel permeation chromatography (GPC) in methylene chloride at 25° C. using polycarbonate standards.

[0112] Component C C1: Potassium perfluorobutanesulfonate available as Bayowet C4 from LANXESS.

[0113] Component D D1: Polymethylsilsesquioxane having an average particle size of 0.8 μm as determined by MALVERN's MS2000, available as ABC E+308 from ABC NANOTECH CO., LTD.

[0114] Component E E1: A masterbatch of polytetrafluoroethylene and styrene-acrylonitrile (SAN) in a 1:1 weight ratio available as ADS 5000 from Chemical Innovation Co., Ltd. (Thailand).

[0115] Component F F1: Boehmite available as Pural™ 200 from Sasol Germany GmbH.

[0116] Ingredient G G1: Pentaerythritol tetrastearate (PETS), a release agent available from FACI as Faci L348. G2: A mixture of 80 wt. % Irgafos™ 168 (tris(2,4-ditert-butylphenyl)phosphite) and 20 wt. % Irganox™ 1076 (2,6-ditert-butyl-4-(octadecaneoxycarbonylethyl)phenol) available as Irganox™ B900 from BASF (China) Company Limited. G3: 2,2'-methylenebis(6-(benzotriazol-2-yl)-4-tert-octylphenol), a UV filter available as TINUVIN 360 from BASF. G4: Potassium diphenylsulfone-3-sulfonate available from Arichem as Arichem KSS-FR™. G5: ABS (acrylonitrile-butadiene-styrene) available as P60 from Styrolution South East Asia Pte Ltd., Singapore. G6: MBS (methyl methacrylate-butadiene-styrene) available from Kaneka as M732.

[0117] Test Method The physical properties of the compositions according to the examples were tested as follows.

[0118] The Izod notched impact strength was measured according to ISO 180 / IA:2000 on test bars with dimensions 80 mm x 10 mm x 3 mm.

[0119] The Vicat softening temperature was determined according to ISO 306:2013 (50N; 120K / h) on bars with dimensions 80mm x 10mm x 4mm.

[0120] Flame retardancy was evaluated according to UL94-2015 on 127mm x 12.7mm x 1.5mm bars.

[0121] Flame retardant stability was judged based on the flame retardant results. If the flame retardant evaluation result for 8 or more out of 10 batches is V0, the stability is positive (+), and if the flame retardant evaluation result for less than 8 out of 10 batches is V0, the stability is negative (-).

[0122] Comparative example 1~Comparative example 17 (CE1~CE17) The materials listed in Table 1 were compounded and granulated in a twin-screw extruder (ZSK-25) (Werner and Pfleider) at a rotation speed of 225 rpm, a throughput of 20 kg / h, and a machine temperature of 260° C. All parts by weight are calculated according to the materials used in all the inventive and comparative examples.

[0123] The granulate was processed into corresponding test specimens in an injection molding machine using a melt temperature of 260°C and a mold temperature of 80°C.

[0124] As used herein, the weight content of BPTMC units in a polycarbonate composition (C BPTMC / C / W ) is calculated as follows: C BPTMC / C / W =(C BPTMC / CO / M ×M wBPTMC )×C co / c / w / (C BPTMC / CO / M ×M wBPTMC’ +C BPA / CO / M ×M wBPA ) (In the formula, C BPTMC / C / W represents the weight content of BPTMC units in the polycarbonate composition, C BPTMC / CO / M represents the molar content of BPTMC units in the copolycarbonate, M wBPTMC represents the molecular weight of the BPTMC unit, expressed in grams per mole, M wBPTMC’ represents the total molecular weight of the BPTMC unit and -C=O-, expressed in grams per mole; C BPA / CO / M represents the molar content of BPA units in the copolycarbonate, M wBPA represents the molecular weight of the BPA unit and -C=O-, expressed in grams per mole, and C co / c / w represents the weight content of the copolycarbonate in the polycarbonate composition).

[0125] Taking Comparative Example 2 as an example, the molar content of BPTMC units in CoPC is 70 mol%, the molar content of BPA units is 30 mol%, the molecular weight of BPTMC units is 308 g / mol, the total molecular weight of BPTMC units and -C=O- is 336 g / mol, and the molecular weight of BPA units (including -C=O-) is 254 g / mol. CoPC is present in the polycarbonate composition in an amount of 10 wt%, so the weight content of BPTMC units in Example 1 of the present invention is (70mol%×308g / mol)×10wt% / (70mol%×336g / mol+30mol%×254g / mol)=6.9wt% It is.

[0126] The resulting compositions were tested for physical properties and the results are summarized in Table 1.

[0127] From Table 1, it can be seen that the composition of Comparative Example 1, which does not contain CoPC, polymethylsilsesquioxane, and boehmite, exhibits a Vicat softening temperature of less than 152°C.

[0128] The compositions of Comparative Examples 2 to 6, which did not contain polymethylsilsesquioxane or boehmite, failed the flame retardancy test.

[0129] The compositions of Comparative Examples 7 to 9, which do not contain polymethylsilsesquioxane, do not exhibit good flame retardant stability.

[0130] The composition of Comparative Example 10, which does not contain polymethylsilsesquioxane, exhibits a flame retardancy level of V1.

[0131] The composition of Comparative Example 11, which did not contain polymethylsilsesquioxane, failed the flame retardancy test.

[0132] The compositions of Comparative Examples 12 to 16, which do not contain boehmite, do not exhibit good flame retardant stability.

[0133] The composition of Comparative Example 17, which does not contain boehmite, exhibits a flame retardancy level of V1.

[0134] [Table 1]

[0135] The BPTMC content refers to the content of BPTMC units in the polycarbonate composition. A fail indicates failure to pass V-2. + means that the flame retardancy evaluation result for 8 or more batches out of 10 batches was V0. - means that the flame retardancy evaluation result for less than 8 batches out of 10 batches was V0.

[0136] Examples 1 to 17 (IE1 to IE17) of the present invention Similarly, the materials listed in Table 2 were formulated and the resulting compositions were tested for physical properties, with the results summarized in Table 2.

[0137] It can be seen from Table 2 that the compositions of Examples 1 to 17 of the present invention exhibit a Vicat softening temperature of 152° C. or higher, a flame retardancy level of V0, and good flame retardancy stability.

[0138] [Table 2]

[0139] The BPTMC content refers to the content of BPTMC units in the polycarbonate composition. + means that the flame retardancy evaluation result for 8 or more batches out of 10 batches was V0. - means that the flame retardancy evaluation result for less than 8 batches out of 10 batches was V0. NA: Not tested.

[0140] Examples 18 to 32 (IE18 to IE32) of the present invention and Comparative Examples 18 to 20 (CE18 to CE20) Similarly, the materials listed in Table 2 were formulated and the resulting compositions were tested for physical properties, with the results summarized in Table 3.

[0141] From Table 3, it can be seen that the compositions of Examples 18 to 32 of the present invention exhibit a Vicat softening temperature of 170° C. or higher, a flame retardancy level of V0 at 1.5 mm, and good flame retardancy stability.

[0142] The composition of Comparative Example 18, in which the CoPC content was 70% by weight based on the total weight of the composition, failed the flame retardancy test.

[0143] The compositions of Comparative Example 19 and Comparative Example 20, which do not contain a fluorine-containing metal organic sulfonate, exhibit a flame retardancy level of V2 at 1.5 mm.

[0144] Furthermore, the compositions of Examples 27 to 30 of the present invention, which include an impact modifier, further exhibit good impact resistance.

[0145] [Table 3]

[0146] The BPTMC content refers to the content of BPTMC units in the polycarbonate composition. A fail indicates failure to pass V-2. + means that the flame retardancy evaluation result for 8 or more batches out of 10 batches was V0. - means that the flame retardancy evaluation result for less than 8 batches out of 10 batches was V0. NA: Not tested.

Claims

1. A polycarbonate composition comprising, based on the total weight of the composition, the following components A to E: A) 8% to 65% by weight of a copolycarbonate, i) Formula (1): 【Chemistry 1】 (In the formula, ＊ indicates the position where formula (1) is attached to the polymer chain, R １ are each independently hydrogen or C １ ~C ４ is alkyl, R ２ are each independently C １ ~C ４ is alkyl, n is 0, 1, 2, or 3; ii) Formula (2): 【Chemistry 2】 (In the formula, ＊ indicates the position where formula (2) is attached to the polymer chain, R ３ are each independently H, a linear or branched C １ ~C １０ alkyl, and R ４ are each independently a linear or branched C １ ~C １０ alkyl) units; and a copolycarbonate comprising: B) a homopolycarbonate containing 30% to 85% by weight of units of formula (2) as defined above; C) 0.06 wt % to 0.30 wt % of a fluorine-containing metal organic sulfonate; D) 0.8% to 10% by weight of a polysilsesquioxane; E) 0.1 wt. % to 0.7 wt. % of an anti-drip agent; F) 0.1 wt. % to 5 wt. % of a hydrolysis stabilizer; wherein the hydrolysis stabilizer is selected from the group consisting of mineral clays; where: A polycarbonate composition, wherein the weight content of the unit of formula (1) in the polycarbonate composition is 5% by weight to 50% by weight, based on the total weight of the composition.

2. 2. The composition of claim 1, wherein the copolycarbonate comprises 20 mol % to 90 mol % of units of formula (1) and 10 mol % to 80 mol % of units of formula (2), wherein the mol % is calculated based on the total number of moles of units of formula (1) and units of formula (2).

3. The copolycarbonate has the formula (1'): 【Transformation 3】 (In the formula, R １ are each independently hydrogen or C １ ~C ４ represents alkyl, R ２ are each independently C １ ~C ４ represents alkyl, and n represents 0, 1, 2, or 3) and a diphenol of formula (2'): 【Chemistry 4】 (In the formula, R ３ are each independently H, a linear or branched C １ ~C １０ represents alkyl, R ４ are each independently a linear or branched C １ ~C １０ 3. The composition of claim 1, wherein the diphenols are substituted with 1 or 2 alkyl groups.

4. The composition described in claim 1 or 2, wherein the copolycarbonate does not contain units derived from diphenols other than bis(4-hydroxyphenyl)-3,3,5-trimethylcyclohexane (BPTMC) and bisphenol A.

5. The unit of formula (2) in the homopolycarbonate is represented by formula (2'): 【Transformation 5】 (In the formula, R 3 's each independently represent H, linear or branched C 1 -C 4 alkyl, and 3. The composition according to claim 1, wherein R 4 is independently a straight-chain or branched C 1 -C 4 alkyl group.

6. The composition according to claim 1 or 2, wherein the unit of formula (2) is derived from bisphenol A.

7. 3. The composition of claim 1, wherein the fluorine-containing metal organic sulfonate is selected from the group consisting of potassium perfluorobutanesulfonate, lithium perfluorobutanesulfonate, sodium perfluorobutanesulfonate, cesium perfluorobutanesulfonate, lithium trifluoromethanesulfonate, sodium trifluoromethanesulfonate, potassium trifluoromethanesulfonate, potassium perfluoroethanesulfonate, potassium perfluoropropanesulfonate, and combinations thereof.

8. The polysilsesquioxane is RSiO １．５ wherein R is hydrogen, C １ ~C １２ Alkyl, C ２ ~C １２ Alkenyl, C １ ~C １２ Alkoxy, C １ ~C １２ Acyl, C ３ ~C ８ 3. The composition of claim 1, wherein the units are selected from cycloalkyl, hydroxy, and phenyl, and comprise said units in an amount of 90 mol % or more of all siloxane units.

9. 3. The composition of claim 1, wherein the hydrolysis stabilizer is selected from the group consisting of boehmite, kaolin, talc, and combinations thereof.

10. based on the total weight of the composition A) 10% to 60% by weight of a copolycarbonate, i) 50 mol % to 90 mol % of formula (1a): 【Transformation 6】 and ii) 10 mol % to 40 mol % of formula (2a): 【Transformation 7】 and wherein the mol % is calculated based on the total number of moles of units of formula (1a) and units of formula (2a); B) a homopolycarbonate containing 33% to 83% by weight of units of formula (2a), C) 0.1 wt % to 0.2 wt % of a fluorine-containing metal organic sulfonate; Here, the fluorine-containing metal organic sulfonate includes at least potassium perfluorobutanesulfonate; D) 1 wt. % to 9 wt. % of a polysilsesquioxane; Here, polysilsesquioxane includes polymethylsilsesquioxane; E) 0.2 wt.% to 0.6 wt.% of an anti-drip agent; wherein polytetrafluoroethylene is included as an anti-drip agent; F) 0.2 wt.% to 0.6 wt.% boehmite; where:

2. The composition of claim 1, wherein the weight content of the units of formula (1a) in the polycarbonate composition is from 6.5% to 45% by weight, relative to the total weight of the composition.

11. 11. A molded article made from the composition of claim 1 or 10.

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