Thermoplastic polycarbonate composition and molded article thereof

Abstract

A thermoplastic polycarbonate composition comprising: 5 to 28 wt% of a brominated polycarbonate; 45 to 90 wt% of a homopolycarbonate having a weight average molecular weight of 20,000 - 25,000 g / mol measured via gel permeation chromatography using a bisphenol A homopolycarbonate standard; 0 to 15 wt% of an aromatic poly(ester - carbonate) comprising carbonate units derived from bisphenol A, resorcinol, or a combination thereof, and ester units derived from bisphenol, preferably bisphenol A, or resorcinol, and terephthalic acid, isophthalic acid, or a combination thereof, wherein the molar ratio of carbonate units to ester units is in the range of 1:99 to 99:1; 2 to 10 wt% of a core - shell impact modifier; 1 wt% to 7 wt% of an α,β - unsaturated glycidyl ester copolymer impact modifier; 0.6 wt% to 3.5 wt% of a coloring composition comprising titanium dioxide and carbon black; wherein the wt% of each component is based on the total weight of the composition and totals 100 wt%.

Description

[0001] Citation of related applications

[0002] This application is filed directly, claiming priority to European Patent Application 20206738.5 filed on November 10, 2020, the entire content of which is incorporated herein by reference. Technical field

[0003] The present disclosure relates to thermoplastic polycarbonate compositions, and more particularly to thermoplastic polycarbonate compositions, methods for their manufacture, and their uses. Background art

[0004] Polycarbonates can be used to manufacture articles and components for a wide range of applications, from automotive parts to electronic devices. Due to their wide use, especially in electrical applications, it is desirable to provide polycarbonates with improved hydrolytic stability and tracking resistance.

[0005] Accordingly, there is still a need in the art for thermoplastic polycarbonate compositions having improved hydrolytic stability and tracking resistance. It would be a further advantage if the thermoplastic polycarbonate composition had good low-temperature impact resistance, flame retardancy, and a black appearance. Summary of the invention

[0006] The above and other deficiencies in the art are met by a thermoplastic composition comprising: a thermoplastic polycarbonate composition comprising: 5 to 28 wt% brominated polycarbonate; 45 to 90 wt% homopolycarbonate having a weight-average molecular weight of 20,000 - 25,000 g / mol as measured by gel permeation chromatography using a bisphenol A homopolycarbonate standard; 0 to 15 wt% aromatic poly(ester-carbonate), the aromatic poly(ester-carbonate) comprising carbonate units derived from bisphenol A, resorcinol, or a combination thereof and ester units derived from bisphenol (preferably bisphenol A) or resorcinol and terephthalic acid, isophthalic acid, or a combination thereof, wherein the molar ratio of carbonate units to ester units is in the range of 1:99 to 99:1; 2 to 10 wt% core-shell impact modifier; 1 wt% to 7 wt% α,β-unsaturated glycidyl ester copolymer impact modifier; 0.6 wt% to 3.5 wt% coloring composition comprising titanium dioxide and carbon black; 0 to 1 wt% hydrostabilizer, preferably epoxy hydrostabilizer; optionally, 0.1 to 10 wt% additive composition; wherein the wt% of each component is based on the total weight of the composition and totals 100 wt%.

[0007] In another aspect, a manufacturing method includes combining the above components to form a thermoplastic polycarbonate composition.

[0008] In yet another aspect, an article comprises the above thermoplastic composition.

[0009] In yet another aspect, a method of making an article includes molding, extruding, or shaping the above-described thermoplastic composition into an article.

[0010] The above and other features are illustrated by the following detailed description and examples. Detailed Description

[0011] Conventional polycarbonate compositions currently used in electrical connectors may not meet the requirements for high-end (e.g., 1500 V) applications regarding tracking over the entire 300 - 600 V range, while also providing hydrolysis stability, low-temperature impact performance, and flame retardancy. The present inventors have discovered a polycarbonate composition having improved electrical properties, improved tracking properties, low-temperature impact performance, and flame retardancy over the entire 300 - 600 V range. The polycarbonate composition includes a brominated polycarbonate, a homopolycarbonate, a core-shell impact modifier, and an α,β-unsaturated glycidyl ester copolymer impact modifier. The polycarbonate composition has improved tracking properties, wherein at 300 V and 600 V, after 80 drops of 0.1% ammonium chloride solution, as measured by ASTM D-3638-85, the molded samples of the composition do not show tracking. The hydrolysis stability of the polycarbonate composition is also improved, wherein the molded samples of the composition exhibit improved molecular weight retention compared to conventional formulations, e.g., greater than 73% (2000 hours) as measured in a hydrolysis chamber at 85°C and 85% relative humidity. The impact performance is maintained, wherein the molded samples (3.2 mm) of the composition have a notched Izod impact strength greater than 260 joules / meter (J / m) at -30°C. In addition, a black appearance is obtained (i.e., a CIE L* of less than 35 as measured in reflection mode according to the CIELab method, 10-degree observer, D65 illuminant, including UV).

[0012] The thermoplastic polycarbonate composition comprises a brominated polycarbonate, a homopolycarbonate, a core-shell impact modifier, an α,β-unsaturated glycidyl ester copolymer impact modifier, a color composition, an optional aromatic poly(ester-carbonate), and an optional water stabilizer. The individual components of the thermoplastic polycarbonate composition are further described in detail below.

[0013] As used herein, "polycarbonate" refers to a polymer having repeating structural carbonate units of formula (1):

[0014]

[0015] wherein R 1 At least 60% of the total number of groups contain an aromatic moiety, and the balance is aliphatic, alicyclic, or aromatic. In one aspect, each R 1 is a C 6-30 aromatic group, i.e., containing at least one aromatic moiety. R1 can be derived from the formula HO-R 1 -OH, especially aromatic dihydroxy compounds of formula (2):

[0016] HO–A 1 –Y 1 –A 2 –OH(2)

[0017] wherein A 1 and A 2 are each a monocyclic divalent aromatic group, and Y 1 is a single bond or a bridging group having one or more atoms separating A 1 from A 2 In one aspect, one atom separates A 1 from A 2 Preferably, each R 1 can be derived from a bisphenol of formula (3):

[0018]

[0019] wherein R a and R b are each independently halogen, C 1-12 alkoxy or C 1-12 alkyl, and p and q are each independently an integer from 0 to 4. It should be understood that when p or q is less than 4, the valence of each carbon of the ring is filled with hydrogen. Also in formula (3), X a is a bridging group connecting two hydroxy-substituted aromatic groups, wherein the bridging group and the hydroxy substituent of each C6 arylene are arranged ortho, meta or para (preferably para) to each other on the C6 arylene. In one aspect, the bridging group X a is a single bond, -O-, -S-, -S(O)-, -S(O)2-, -C(O)-, or C 1-60 organic group. The organic bridging group can be cyclic or acyclic, aromatic or non-aromatic, and can further contain heteroatoms such as halogen, oxygen, nitrogen, sulfur, silicon, or phosphorus. The C 1-60 organic group can be arranged such that the C6 arylenes attached thereto are each attached to a common alkylene carbon or different carbons of the C 1-60 organic bridging group. In one aspect, p and q are each 1, and R a and R b are each C 1-3 alkyl located meta to the hydroxy group on each arylene, preferably methyl.

[0020] Some illustrative examples of specific dihydroxy compounds include the following: 4,4'-dihydroxybiphenyl, 1,6-dihydroxynaphthalene, 2,6-dihydroxynaphthalene, bis(4-hydroxyphenyl)methane, bis(4-hydroxyphenyl)diphenylmethane, bis(4-hydroxyphenyl)-1-naphthylmethane, 1,2-bis(4-hydroxyphenyl)ethane, 1,1-bis(4-hydroxyphenyl)-1-phenylethane, 2-(4-hydroxyphenyl)-2-(3-hydroxyphenyl)propane, bis(4-hydroxyphenyl)phenylmethane, 2,2-bis(4-hydroxy-3-bromophenyl)propane, 1,1-bis(hydroxyphenyl)cyclopentane, 1,1-bis(4-hydroxyphenyl)cyclohexane, 1,1-bis(4-hydroxyphenyl)isobutene, 1,1-bis(4-hydroxyphenyl)cyclododecaneamide, trans-2,3-bis(4-hydroxyphenyl)-2-butene, 2,2-bis(4-hydroxyphenyl)adamantane, α,α'-bis(4-hydroxyphenyl)toluene, bis(4-hydroxyphenyl)acetonitrile, 2,2-bis(3-methyl-4-hydroxyphenyl)propane, 2,2-bis(3-ethyl-4-hydroxyphenyl)propane, 2,2-bis(3-n-propyl-4-hydroxyphenyl)propane, 2,2-bis(3-isopropyl-4-hydroxyphenyl)propane, 2,2-bis(3-sec-butyl-4-hydroxyphenyl)propane, 2,2-bis(3-tert-butyl-4-hydroxyphenyl)propane, 2,2-bis(3-cyclohexyl-4-hydroxyphenyl)propane, 2,2-bis(3-allyl-4-hydroxyphenyl)propane, 2,2-bis(3-methoxy-4-hydroxyphenyl)propane, 2,2-bis(4-hydroxyphenyl)hexafluoropropane, 1,1-dichloro-2,2-bis(4-hydroxyphenyl)ethylene, 1,1-dibromo-2,2-bis(4-hydroxyphenyl)ethylene, 1,1-dichloro-2,2-bis(5-phenoxy-4-hydroxyphenyl)ethylene, 4,4'-dihydroxybenzophenone, 3,3-bis(4-hydroxyphenyl)-2-butanone, 1,6-bis(4-hydroxyphenyl)-1,6-hexanedione, ethylene glycol bis(4-hydroxyphenyl)ether, bis(4-hydroxyphenyl)ether, bis(4-hydroxyphenyl)sulfide, bis(4-hydroxyphenyl)sulfoxide, bis(4-hydroxyphenyl)sulfone, 9,9-bis(4-hydroxyphenyl)fluorene, 2,7-dihydroxypyrene, 6,6'-dihydroxy-3,3,3',3'-tetramethylspiro(bis)indane ("spirobiindane bisphenol"), 3,3-bis(4-hydroxyphenyl)phthalimide, 2,6-dihydroxydibenzo-p-dioxin, 2,6-dihydroxythianthrene, 2,7-dihydroxyphenothiazine, 2,7-dihydroxy-9,10-dimethylphenazine, 3,6-dihydroxydibenzofuran, 3,6-dihydroxydibenzothiophene, and 2,7-dihydroxycarbazole, resorcinol, substituted resorcinol compounds such as 5-methylresorcinol, 5-ethylresorcinol, 5-propylresorcinol, 5-butylresorcinol, 5-tert-butylresorcinol, 5-phenylresorcinol, 5-cumylresorcinol, 2,4,5,6-tetrafluororesorcinol, 2,4,5,6 - tetrabromoresorcinol, etc.; catechol; hydroquinone; substituted hydroquinones such as 2 - methylhydroquinone, 2 - ethylhydroquinone, 2 - propylhydroquinone, 2 - butylhydroquinone, 2 - tert - butylhydroquinone, 2 - phenylhydroquinone, 2 - cumylhydroquinone, 2,3,5,6 - tetramethylhydroquinone, 2,3,5,6 - tetra - tert - butylhydroquinone, 2,3,5,6 - tetrafluorohydroquinone, 2,3,5,6 - tetrabromohydroquinone, etc., or combinations thereof.,

[0021] Specific examples of the bisphenol compound of formula (3) include 1,1 - bis(4 - hydroxyphenyl)methane, 1,1 - bis(4 - hydroxyphenyl)ethane, 2,2 - bis(4 - hydroxyphenyl)propane (hereinafter "bisphenol A" or "BPA"), 2,2 - bis(4 - hydroxyphenyl)butane, 2,2 - bis(4 - hydroxyphenyl)octane, 1,1 - bis(4 - hydroxyphenyl)propane, 1,1 - bis(4 - hydroxyphenyl)n - butane, 2,2 - bis(4 - hydroxy - 2 - methylphenyl)propane, 1,1 - bis(4 - hydroxy - tert - butylphenyl)propane, 3,3 - bis(4 - hydroxyphenyl)benzopyrrolone, 2 - phenyl - 3,3 - bis(4 - hydroxyphenyl)benzopyrrolone (PPPBP), and 1,1 - bis(4 - hydroxy - 3 - methylphenyl)cyclohexane (DMBPC). Combinations can also be used. In a specific aspect, the polycarbonate is a linear homopolymer derived from bisphenol A, where in formula (3) A 1 and A 2 are each p - phenylene and Y 1 is isopropylidene.,

[0022] The thermoplastic polycarbonate composition comprises a homopolycarbonate (where each R in the polymer 1 is the same). In one aspect, the homopolycarbonate in the thermoplastic polycarbonate composition is derived from the bisphenol of formula (2), preferably bisphenol A, where A 1 and A 2 are each p - phenylene and Y 1is the isopropylidene group in formula (2). The homopolycarbonate can have an intrinsic viscosity of 0.3 - 1.5 deciliters per gram (dl / gm), preferably 0.45 - 1.0 dl / gm, measured in chloroform at 25°C. The homopolycarbonate can have a weight-average molecular weight (Mw) of 10,000 - 200,000 grams per mole (g / mol), preferably 20,000 - 100,000 g / mol, measured by gel permeation chromatography (GPC) using a cross-linked styrene - divinylbenzene column and calibrated against a bisphenol A homopolycarbonate reference. The GPC sample is prepared at a concentration of 1 mg / ml and eluted at a flow rate of 1.5 ml / minute. In some aspects, the homopolycarbonate is a bisphenol A homopolycarbonate having an Mw of 18,000 - 35,000 g / mol, preferably 20,000 - 25,000 g / mol; 25,000 - 35,000 g / mol, preferably 27,000 - 32,000 g / mol; or a combination thereof, each measured as described above.

[0023] In some aspects, the homopolycarbonate is a bisphenol A homopolycarbonate having: at 300°C and a load of 1.2 kg, a melt flow rate of 20 - 35, preferably 25 - 30 cm 3 / 10 min and an Mw of 20,000 - 25,000 g / mol, preferably 21,000 - 23,000 g / mol; preferably at 300°C and a load of 1.2 kg a melt flow rate of 25 - 30 cm 3 / 10 min and an Mw of 20,000 - 25,000 g / mol, preferably 21,000 - 23,000 g / mol, each measured as described above. In some aspects, the homopolycarbonate is a bisphenol A homopolycarbonate prepared by a melt process, a bisphenol A homopolycarbonate prepared by an interfacial process, or a mixture of a bisphenol A homopolycarbonate prepared by a melt process and a bisphenol A homopolycarbonate prepared by an interfacial process, wherein the bisphenol A homopolycarbonate has an Mw of 20,000 - 25,000 g / mol, preferably 21,000 - 23,000 g / mol, each measured as above. The total homopolycarbonate can be present, for example, 45 - 90 wt%, or 50 - 85 wt%, each based on the total weight of the thermoplastic polycarbonate composition.

[0024] In some aspects, the homopolycarbonate is a bisphenol A homopolycarbonate prepared by a melt process or a mixture of a bisphenol A homopolycarbonate prepared by a melt process and a bisphenol A homopolycarbonate prepared by an interfacial process. When the bisphenol A homopolycarbonate prepared by a melt process is used in combination with the bisphenol A homopolycarbonate prepared by an interfacial process, the bisphenol A homopolycarbonate prepared by a melt process can be present, for example, 10 - 60 wt%, 15 - 55 wt%, or 20 - 50 wt%, each based on the total weight of the thermoplastic polycarbonate composition. The bisphenol A homopolycarbonate prepared by an interfacial process can be present, for example, 1 - 60 wt%, or 1 - 55 wt%, each based on the total weight of the thermoplastic polycarbonate composition.

[0025] The thermoplastic polycarbonate composition comprises a brominated polycarbonate different from the homopolycarbonate. Combinations of different brominated polycarbonates can be used. The brominated polycarbonate can be an oligomer or a polymer and can be derived from an aromatic dihydroxy compound of formula (2): Each R h is bromine and n is from 1 to 4; or a bisphenol of formula (3), wherein X a is as defined for formula (3), p and q are each independently from 0 to 4, provided that the sum of p and q is at least 1, and R a is independently at each occurrence C 1-3 methyl, C 1-3 alkoxy or bromine, provided that at least one R a is bromine. In one aspect, combinations of two or more different brominated aromatic dihydroxy compounds can be used. Alternatively, the brominated polycarbonate can be derived from a combination of brominated and non-brominated aromatic dihydroxy compounds. If a non-brominated aromatic dihydroxy compound is used, any of the above bisphenols (3) can be used. In one aspect, when a non-brominated aromatic dihydroxy compound is used, the non-brominated aromatic dihydroxy compound can be bisphenol A. If a combination of brominated and non-brominated aromatic dihydroxy compounds is used, preferably the combination comprises at least 25 mole percent (mol%) of the brominated dihydroxy aromatic compound, more preferably at least 25 to 55 mol% of the brominated diphenol, to produce a flame retardant brominated polycarbonate. Branched brominated polycarbonate oligomers can also be used, as can compositions of linear brominated polycarbonate oligomers and branched brominated polycarbonate oligomers. Combinations of different brominated copolycarbonate oligomers can be used. Exemplary brominated polycarbonates are disclosed in U.S. Patent No. 4,923,933 to Curry, U.S. Patent No. 4,170,700 to Orlando et al., and U.S. Patent No. 3,929,908 to Orlando et al.

[0026] Based on the weight of the brominated polycarbonate, respectively, the brominated polycarbonate may have a bromine content of 10 wt% to 50 wt%, 15 wt% to 40 wt%, 20 wt% to 30 wt%, or 24 wt% to 27.5 wt%. Optionally, the brominated polycarbonate may be capped with phenol or 2,4,6-tribromophenol. The brominated polycarbonate may have an intrinsic viscosity of 0.2 to 1.5 dL / g measured in dichloromethane at 25 °C. Within this range, the intrinsic viscosity may be 0.4 to 1 dL / g. The brominated polycarbonate may have an Mw of 1,000 to 30,000 g / mol, such as 1,000 to 18,000 g / mol, or 2,000 to 15,000 g / mol, or 3,000 to 12,000 g / mol; or alternatively 15,000 to 25,000 g / mol, or 20,000 to 25,000 g / mol. The brominated polycarbonate may be branched or linear, or a combination of branched and linear brominated polycarbonates may be used.

[0027] In one aspect, the brominated aromatic dihydroxy compound may be 2,2-bis(3,5-dibromo-4-hydroxyphenyl)propane (2’,6,6’-tetrabromo-4,4’-isopropylidenediphenol (TBBPA)), bis(3,5-dibromo-4-hydroxyphenyl)menthone, or 2,2’,6,6’-tetramethyl-3,3’,5,5’-tetrabromo-4,4’-biphenol; and the non-brominated aromatic dihydroxy compound for copolymerizing with the brominated aromatic dihydroxy compound includes bisphenol A, bis(4-hydroxyphenyl)methane, 2,2-bis(4-hydroxy-3-methylphenyl)propane, 4,4-bis(4-hydroxyphenyl)heptane, and (3,3’-dichloro-4,4’-dihydroxydiphenyl)methane. In another preferred aspect, the brominated polycarbonate contains brominated carbonate units derived from TBBPA and carbonate units derived from bisphenol A, and more preferably contains 30 to 70 wt% of TBBPA and 30 to 70 wt% of bisphenol A, or 45 to 55 wt% of TBBPA and 45 to 55 wt% of bisphenol A.

[0028] For example, based on the total weight of the thermoplastic polycarbonate composition totaling 100 wt%, the thermoplastic polycarbonate composition may contain 5 - 28 wt%, 5 - 25 wt%, 10 - 25 wt% of the brominated polycarbonate. Based on the total weight of the composition, the brominated polycarbonate may be used in an amount that contributes 2 to 20 wt% of bromine to the composition.

[0029] The thermoplastic polycarbonate composition may contain an aromatic poly(ester - carbonate). In addition to the repeating carbonate units of formula (1), such a polycarbonate further contains repeating ester units of formula (3):

[0030]

[0031] Wherein J is a divalent group derived from an aromatic dihydroxy compound (including its reactive derivatives), such as a bisphenol of formula (2), for example, bisphenol A; and T is a divalent group derived from an aromatic dicarboxylic acid (including its reactive derivatives), preferably isophthalic acid or terephthalic acid, wherein the weight ratio of isophthalic acid to terephthalic acid is from 91:9 to 2:98. Copolyesters containing combinations of different T or J groups can be used. The polyester units can be branched or linear.

[0032] In one aspect, J is obtained from a bisphenol of formula (2), for example, bisphenol A. In another aspect, J is derived from an aromatic dihydroxy compound, for example, resorcinol. A portion of the group J, for example, up to 20 mole percent (mol%) can be a C 2-30 alkylene group having a linear, branched or cyclic (including polycyclic) structure, such as ethylene, n-propylene, isopropylene, 1,4-butylene, 1,4-cyclohexylene or 1,4-methylenecyclohexane. Preferably, all J groups are aromatic.

[0033] Aromatic dicarboxylic acids useful for preparing the polyester units include isophthalic acid or terephthalic acid, 1,2-bis(p-carboxyphenyl)ethane, 4,4'-dicarboxydiphenyl ether, 4,4'-dibenzoic acid, or combinations thereof. Acids containing fused rings, such as 1,4-, 1,5-, or 2,6-naphthalenedicarboxylic acid, can also be present. Specific dicarboxylic acids include terephthalic acid, isophthalic acid, naphthalenedicarboxylic acid, or combinations thereof. Specific dicarboxylic acids include combinations of isophthalic acid and terephthalic acid, wherein the weight ratio of isophthalic acid to terephthalic acid is from 91:9 to 2:98. A portion of the group T, for example, up to 20 mol%, can be aliphatic, such as derived from 1,4-cyclohexanedicarboxylic acid. Preferably, all T groups are aromatic.

[0034] The molar ratio of ester units to carbonate units in the polycarbonate can vary widely, for example, from 1:99 to 99:1, preferably from 10:90 to 90:10, more preferably from 25:75 to 75:25, or from 2:98 to 15:85, depending on the desired properties of the final composition.

[0035] Specific poly(ester-carbonate)s are those comprising bisphenol A carbonate units and isophthalate / terephthalate-bisphenol A ester units, i.e., poly(bisphenol A carbonate)-co-(bisphenol A-phthalate-ester) of formula (4a)

[0036]

[0037] wherein x and y represent the wt% of bisphenol A carbonate units and isophthalate / terephthalate-bisphenol A ester units, respectively. Usually, the units exist as blocks. In one aspect, the weight ratio of carbonate units x to ester units y in the polycarbonate is 1:99 to 50:50, or 5:95 to 25:75, or 10:90 to 45:55. A copolymer of formula (3) containing 35 - 45 wt% of carbonate units and 55 - 65 wt% of ester units, wherein the ester units have a molar ratio of isophthalate to terephthalate of 45:55 to 55:45 is generally referred to as poly(carbonate-ester) (PCE). A copolymer containing 15 - 25 wt% of carbonate units and 75 - 85 wt% of ester units, wherein the ester units have a molar ratio of isophthalate to terephthalate from 98:2 to 88:12 is generally referred to as poly(phthalate-carbonate) (PPC).

[0038] In another aspect, the high heat poly(ester-carbonate) is a poly(carbonate-co-monoaryl ester) of formula (4b), which comprises aromatic carbonate units (1) and repeating monoaryl ester units:

[0039]

[0040] wherein R 1 is defined as in formula (1), and each R h is independently a halogen atom, a C 1-10 hydrocarbyl such as a C 1-10 alkyl, a halogen-substituted C 1-10 alkyl, a C 6-10 aryl or a halogen-substituted C 6-10 aryl, and n is 0 - 4. Preferably, each R h is independently a C 1-4 alkyl, and n is 0 - 3, 0 - 1 or 0. The molar ratio of carbonate units x to ester units z can be 99:1 to 1:99, or 98:2 to 2:98, or 90:10 to 10:90. In an aspect, the molar ratio of x:z is 50:50 to 99:1, or 1:99 to 50:50.

[0041] In one aspect, the poly(ester-carbonate) comprises aromatic ester units and monoaryl ester units derived from the reaction of a combination of isophthalic acid and terephthalic acid (or their reactive derivatives) with resorcinol (or its reactive derivative) to provide isophthalate / terephthalate-resorcinol (“ITR” ester units). Based on the total moles of ester units in the polycarbonate, the ITR ester units can be present in the high heat poly(ester-carbonate) in an amount greater than or equal to 95 mol%, preferably greater than or equal to 99 mol%, and still more preferably greater than or equal to 99.5 mol%. The preferred high heat poly(ester-carbonate) comprises bisphenol A carbonate units and ITR ester units derived from terephthalic acid, isophthalic acid, and resorcinol, i.e., poly(bisphenol A carbonate-co-isophthalate / terephthalate-resorcinol ester) of formula (c):

[0042]

[0043] where the molar ratio of x:z is from 98:2 to 2:98, or from 90:10 to 10:90. In aspects, the molar ratio of x:z is from 50:50 to 99:1, or from 1:99 to 50:50. Based on the total moles of ester units in the copolymer, the ITR ester units can be present in the poly(bisphenol A carbonate-co-isophthalate-terephthalate-resorcinol ester) in an amount greater than or equal to 95 mol%, preferably greater than or equal to 99 mol%, and still more preferably greater than or equal to 99.5 mol%. Based on the total moles of units in the copolymer, other carbonate units, other ester units, or combinations thereof can be present in a total amount of 1 to 20 mol%, such as monoaryl carbonate units of formula (5) and bisphenol ester units of formula (3a):

[0044]

[0045] wherein, in the above formulas, R h are each independently a C 1-10 hydrocarbyl group, n is 0 - 4, R a and R b are each independently a C 1-12 alkyl group, p and q are each independently an integer from 0 - 4, and X a is a single bond, -O-, -S-, -S(O)-, -S(O)2-, -C(O)-, or a C c alkylene group of the formula –C(R d )(R 1-13 ), wherein R c and R d are each independently hydrogen or a C 1-12 alkyl group or a group of the formula –C(=R e ), wherein R e is a divalent C1-12 Alkyl group. The bisphenol ester unit may be a bisphenol A phthalate unit of formula (3b):

[0046]

[0047] In one aspect, poly(bisphenol A carbonate-co-isophthalate / terephthalate-resorcinol ester) (4c) comprises 1-90 mol% of bisphenol A carbonate units, 10-99 mol% of isophthalic acid-terephthalic acid-resorcinol ester units, and optionally 1-60 mol% of resorcinol carbonate units, isophthalic acid-terephthalic acid-bisphenol A phthalate units, or combinations thereof. In another aspect, poly(bisphenol A carbonate-co-isophthalate / terephthalate resorcinol ester) (6) comprises 10-20 mol% of bisphenol A carbonate units, 20-98 mol% of isophthalic acid-terephthalic acid-resorcinol ester units, and optionally 1-60 mol% of resorcinol carbonate units, isophthalic acid-terephthalic acid-bisphenol A phthalate units, or combinations thereof.

[0048] The poly(ester-carbonate) may have an Mw of 2,000-100,000 g / mol, preferably 3,000-75,000 g / mol, more preferably 4,000-50,000 g / mol, more preferably 5,000-35,000 g / mol, and still more preferably 17,000-30,000 g / mol. Using GPC, with a cross-linked styrene-divinylbenzene column, at a sample concentration of 1 mg / ml, and calibrated with bisphenol A homopolycarbonate standards, molecular weight determination is carried out. Dichloromethane is used as the eluent to elute the sample at a flow rate of 1.0 ml / min.

[0049] Respectively based on the total weight of the thermoplastic polycarbonate composition, the aromatic poly(ester-carbonate) may be present, for example, in an amount of 0-15 wt%, 0.01-15 wt%, 0-12 wt%, 0.01-12 wt%, 0-10 wt%, or 0.01-10 wt%. In some aspects, the poly(ester-carbonate) is absent.

[0050] Polycarbonates can be prepared by methods such as interfacial polymerization and melt polymerization, which are known and described, for example, in WO 2013 / 175448 A1 and WO 2014 / 072923 A1. A capping agent (also known as a chain terminator or chain stopper) may be included during polymerization to provide end groups, such as monocyclic phenols like phenol, p-cyanophenol, and C 1-22Alkyl-substituted phenols such as p-cumylphenol, resorcinol monobenzoate and p-tert-butylphenol, monoethers of dihydric phenols such as p-methoxyphenol, monoesters of dihydric phenols such as resorcinol monobenzoate, functionalized chlorides of aliphatic monocarboxylic acids such as acryloyl chloride and methacryloyl chloride, and monochloroformates such as phenyl chloroformate, alkyl-substituted phenyl chloroformates, p-cumylphenyl chloroformate and tolyl chloroformate. Combinations of different end groups can be used. Branched polycarbonate blocks can be prepared by adding a branching agent during the polymerization process, such as trimellitic acid, trimellitic anhydride, trimellitic trichloride, tris(p-hydroxyphenyl)ethane, isatin-bisphenol, triphenol TC (1,3,5-tris((p-hydroxyphenyl)isopropyl)benzene), triphenol PA (4(4(1,1-bis(p-hydroxyphenyl)-ethyl)α,α-dimethylbenzyl)phenol), 4-chlorocarbonyl phthalic anhydride, trimesic acid and benzophenone tetracarboxylic acid. The branching agent can be added at a level of 0.05 to 2.0 wt%. %. Combinations including linear polycarbonate and branched polycarbonate can be used.

[0051] Compared with conventional formulations, the thermoplastic polycarbonate composition can have improved impact resistance at -30 °C and / or -40 °C. For this purpose, the thermoplastic polycarbonate composition contains a core-shell impact modifier and an α,β-unsaturated glycidyl ester copolymer impact modifier. In some aspects, there is no poly(carbonate-siloxane).

[0052] The thermoplastic polycarbonate composition contains a core-shell impact modifier. In some aspects, the core-shell impact modifier is a core-shell silicone-(meth)acrylate impact modifier, which includes a rubbery silicone core and a grafted rigid (meth)acrylate shell rigid shell. The silicone core can contain dimethylsiloxane units. The (meth)acrylate monomers used to form the shell are generally a combination of monofunctional and copolymerizable polyfunctional (meth)acrylate monomers. Examples of monofunctional (meth)acrylate monomers include branched or linear (C 1-8 alkyl)(meth)acrylates and (meth)acrylic acid glycidyl ester, and examples of copolymerizable polyfunctional monomers include allyl (meth)acrylate, ethylene glycol dimethacrylate and 1,3-butanediol dimethacrylate. Preferred monomers are C 1-6 alkyl esters of methacrylic acid, such as methyl methacrylate. Other monomers can optionally be present in the silicone core or the rigid shell, such as styrene, α-methylstyrene, halogen or C 1-3 alkyl-substituted styrenes, acrylonitrile, methacrylonitrile, maleic acid, maleic anhydride, C 1-4 alkyl and phenyl N-substituted maleimides, divinylbenzene, triallyl cyanurate, triallyl isocyanurate, diallyl phthalate, etc.

[0053] Methods for preparing core - shell silicone - (meth)acrylate impact modifiers are known in the art, as described, for example, in U.S. Patent Nos. 7,615,594, 4,888,388, and 4,963,619. The silicone (meth)acrylate impact modifier can be prepared by emulsion polymerization, where, for example, a silicone rubber monomer is reacted with a first graft - linking monomer in the presence of a surfactant such as dodecylbenzenesulfonic acid to form a silicone rubber latex. Alternatively, cyclic siloxanes such as octamethylcyclotetrasiloxane and tetraethoxysilicate can be reacted with a first graft - linking monomer such as (γ - methacryloxypropyl)methyldimethoxysilane. Then, optionally in the presence of a cross - linking monomer (e.g., allyl methacrylate), in the presence of a free - radical - generating polymerization catalyst (e.g., benzoyl peroxide), a monofunctional (meth)acrylate monomer is polymerized with the silicone rubber particles. In one aspect, the impact modifier is prepared by an emulsion polymerization method that does not contain basic materials such as alkali metal salts of C6 - 30 fatty acids, e.g., sodium stearate, lithium stearate, sodium oleate, potassium oleate, etc., alkali metal carbonates, amines such as dodecyldimethylamine, dodecylamine, etc., and ammonium salts of amines. Such materials are commonly used as surfactants in emulsion polymerization and can catalyze the transesterification or degradation of polycarbonates. Instead, ionic sulfate, sulfonate, or phosphate surfactants can be used to prepare the impact modifier, especially the elastomeric substrate portion of the impact modifier. Useful surfactants include, for example, C 1-22 alkyl or C 7-25 alkylarylsulfonates, C 1-22 alkyl or C 7-25 alkylarylsulfates, C 1-22 alkyl or C 7-25 alkylarylphosphates, substituted silicates, or combinations thereof. Specific surfactants are C 6-16 , preferably C 8-12 alkyl sulfonates. Such emulsion polymerization methods are described and disclosed in various patents and literature such as those of Dow and General Electric Company.

[0054] The core - shell silicone - (meth)acrylate impact modifier can have a rubber content of 30 wt% to 90 wt%; and a silicone core content of 50 to 80 wt%, or 60 to 70 wt%, or 65 to 75 wt%. Such a silicone (meth)acrylate impact modifier can have an average particle size of 100 nanometers to 2 micrometers. In aspects, the particle size is 200 to 400 nm, or greater than 400 nm, or greater than 500 nm.

[0055] Specific core-shell silicone-(meth)acrylate impact modifiers that can be used include, for example, those commercially available from Mitsubishi Rayon under the trade names METABLEN S-2001, METABLEN S-2100, METABLEN S-2200, and METABLEN S-2501.

[0056] Based on the total weight of the thermoplastic polycarbonate composition, the thermoplastic polycarbonate composition can include, for example, 2-10 wt%, 3-9 wt%, or 4-8 wt% of the core-shell impact modifier.

[0057] The thermoplastic polycarbonate composition contains an α,β-unsaturated glycidyl ester copolymer impact modifier. The α,β-unsaturated glycidyl ester repeating unit can have the following structure:

[0058]

[0059] wherein G is hydrogen or C 1-10 alkyl. Exemplary α,β-unsaturated glycidyl ester repeating units include glycidyl acrylate, glycidyl methacrylate, and glycidyl ethyl acrylate. In addition to the α,β-unsaturated glycidyl ester repeating unit, the α,β-unsaturated glycidyl ester copolymer can further contain repeating units derived from α-olefins, such as ethylene, propylene, 1-butene, and 1-hexene. In some aspects, the α-olefin is ethylene. The α,β-unsaturated glycidyl ester copolymer can further contain repeating units derived from vinyl esters or C 1-12 alkyl esters of (meth)acrylic acid. Examples of vinyl esters include vinyl acetate and vinyl propionate. Examples of (meth)acrylic acid alkyl esters include methyl acrylate, ethyl acrylate, butyl acrylate, 2-ethylhexyl acrylate, methyl methacrylate, ethyl methacrylate, butyl methacrylate, and 2-ethylhexyl methacrylate. In some aspects, the C 1-12 alkyl ester repeating unit of (meth)acrylic acid is methyl acrylate. In some aspects, the α,β-unsaturated glycidyl ester copolymer impact modifier is a copolymer of an α,β-unsaturated glycidyl ester repeating unit and an α-olefin repeating unit. In other aspects, the α,β-unsaturated glycidyl ester copolymer impact modifier is a terpolymer of an α,β-unsaturated glycidyl ester repeating unit, an α-olefin repeating unit, and a vinyl ester repeating unit, a C 1-12 alkyl ester repeating unit of (meth)acrylic acid or a combination thereof. In some aspects, the α,β-unsaturated glycidyl ester copolymer impact modifier contains 60 to 99 wt% of α-olefin repeating units, 0.1 to 20 wt% of α,β-unsaturated glycidyl ester repeating units, and 0 to 39 wt% of vinyl ester repeating units, C1-12 alkyl ester repeating units, or combinations thereof. The α,β-unsaturated glycidyl ester copolymer impact modifier can include poly(ethylene-co-glycidyl acrylate) (E-GA), poly(ethylene-co-glycidyl methacrylate) (E-GMA), poly(ethylene-co-glycidyl methacrylate-co-methyl acrylate) (E-GMA-MA), poly(ethylene-co-glycidyl methacrylate-co-ethyl acrylate) (E-GMA-EA), poly(ethylene-co-glycidyl methacrylate-co-vinyl acetate) (E-GMA-VA), or combinations thereof. In some aspects, the α,β-unsaturated glycidyl ester copolymer impact modifier is poly(ethylene-co-glycidyl methacrylate), poly(ethylene-co-methyl acrylate-co-glycidyl methacrylate), or combinations thereof. Commercially available α,β-unsaturated glycidyl ester copolymer impact modifiers include LOTADER AX8840 (E-GMA), and LOTADER AX8900, LOTADER AX8920, and LOTADER AX8950 (E-GMA-MA).

[0060] Based on the total weight of the thermoplastic polycarbonate composition, the α,β-unsaturated glycidyl ester copolymer impact modifier can be present, for example, at 1-7 wt%, 2-8 wt%, or 2-5 wt%.

[0061] The thermoplastic polycarbonate composition comprises a colorant composition. The colorant composition comprises carbon black and titanium dioxide. The colorant composition can be present, for example, at 0.6-3.5 wt%, 0.6-3 wt%, 0.6-2 wt%, 0.6-1.5 wt%, or 1-1.5 wt%, each based on the total weight of the thermoplastic polycarbonate composition. Based on the total weight of the thermoplastic polycarbonate composition, carbon black can be present, for example, at 0.1 wt% to 0.5 wt%, and titanium dioxide can be present, for example, at 0.5 wt% to 3 wt%, 0.5 wt% to 2.5 wt%, 0.5 wt% to 2.0 wt%, 0.5 wt% to 1.5 wt%, or 1 wt% to 1.5 wt%.

[0062] There may also be additional colorants other than carbon black and titanium dioxide, such as pigment and dye additives. Useful pigments can include, for example, inorganic pigments such as metal oxides and mixed metal oxides such as zinc oxide, titanium dioxide, iron oxide, etc.; sulfides such as zinc sulfide, etc.; aluminates; sodium sulfosilicate, chromates, etc.; carbon black; zinc ferrite; ultramarine; organic pigments such as azo, diazo, quinacridone, perylene, naphthalenetetracarboxylic acid, flavanthrone, isoindolinone, tetrachloroisoindolinone, anthraquinone, anthrone, dioxazine, phthalocyanine and azo lake; Pigment Red 101, Pigment Red 122, Pigment Red 149, Pigment Red 177, Pigment Red 179, Pigment Red 202, Pigment Violet 29, Pigment Blue 15, Pigment Blue 60, Pigment Green 7, Pigment Yellow 119, Pigment Yellow 147, Pigment Yellow 150 and Pigment Brown 24; or combinations thereof.

[0063] Dyes are generally organic materials and include coumarin dyes such as coumarin 460 (blue), coumarin 6 (green), Nile red, etc.; lanthanide complexes; hydrocarbon and substituted hydrocarbon dyes; polycyclic aromatic hydrocarbon dyes; scintillation dyes such as oxazole or oxadiazole dyes; aryl- or heteroaryl-substituted poly(C 2-8) Olefin dyes; cyanine dyes; indanthrene dyes; phthalocyanine dyes; oxazine dyes; carbostyryl dyes; naphthalenetetracarboxylic acid dyes; porphyrin dyes; bis(styryl)biphenyl dyes; acridine dyes; anthraquinone dyes; cyanine dyes; polymethine dyes; arylmethane dyes; azo dyes; indigo dyes, thioindigo dyes, diazo dyes; nitro dyes; quinoneimine dyes; aminoketone dyes; tetrazolium dyes; thiazole dyes; perylene dyes, violanthrone dyes; bis-benzooxazolylthiophene (BBOT); triarylmethane dyes; xanthene dyes; thioxanthene dyes; naphthalenedicarboximide dyes; lactone dyes; fluorophores such as anti-Stokes shift dyes that absorb near-infrared wavelengths and emit visible wavelengths, etc.; luminescent dyes such as 7-amino-4-methylcoumarin; 3-(2'-benzothiazolyl)-7-diethylaminocoumarin; 2-(4-biphenylyl)-5-(4-tert-butylphenyl)-1,3,4-oxadiazole; 2,5-bis-(4-biphenylyl)-oxazole; 2,2'-dimethyl-p-quaterphenyl; 2,2-dimethyl-p-terphenyl; 3,5,3"",5""-tetra-tert-butyl-p-quinquephenyl; 2,5-diphenylfuran; 2,5-diphenyloxazole; 4,4'-diphenylstilbene; 4-dicyanomethylene-2-methyl-6-(p-dimethylaminostyryl)-4H-pyran; 1,1'-diethyl-2,2'-carbocyanine iodide; 3,3'-diethyl-4,4',5,5'-dibenzothiatricarbocyanine iodide; 7-dimethylamino-1-methyl-4-methoxy-8-azaquinolone-2; 7-dimethylamino-4-methylquinolone-2; 2-(4-(4-dimethylaminophenyl)-1,3-butadienyl)-3-ethylbenzothiazolium perchlorate; 3-diethylamino-7-diethyliminophenoxazine perchlorate; 2-(1-naphthyl)-5-phenyloxazole; 2,2'-p-phenylene-bis(5-phenyloxazole); rhodamine 700; rhodamine 800; pyrene, chrysene, rubrene, coronene, etc.; or combinations thereof.

[0064] The thermoplastic composition may further comprise one or more auxiliary impact modifiers. Suitable auxiliary impact modifiers are generally high molecular weight elastomeric materials derived from olefins, monovinyl aromatic monomers, acrylic and methacrylic acids and their ester derivatives, and conjugated dienes. Polymers formed from conjugated dienes may be fully or partially hydrogenated. The elastomeric material may be in the form of a homopolymer or copolymer, including random, block, radial block, graft, and core-shell copolymers. Combinations of auxiliary impact modifiers may be used.

[0065] Certain types of secondary impact modifiers are elastomer-modified graft copolymers that comprise (i) an elastomeric (i.e., rubbery) polymer matrix having a Tg less than 10 °C, more preferably less than -10 °C, or more preferably -40 °C to -80 °C, and (ii) a rigid polymer superstrate grafted to the elastomeric polymer matrix. Materials suitable for use as the elastomeric phase include, for example, conjugated diene rubbers such as polybutadiene and polyisoprene; copolymers of conjugated dienes with less than 50 wt.% of copolymerizable monomers such as mono-vinyl compounds like styrene, acrylonitrile, n-butyl acrylate, or ethyl acrylate; olefin rubbers such as ethylene propylene copolymer (EPR) or ethylene-propylene-diene monomer rubber (EPDM); ethylene-vinyl acetate rubber; silicone rubber; elastomeric (meth)acrylic C 1-8 alkyl esters; elastomeric copolymers of (meth)acrylic C 1-8 alkyl esters with butadiene or styrene; or combinations thereof. Materials suitable for use as the rigid phase include, for example, mono-vinyl aromatic monomers such as styrene and α-methylstyrene, and mono-vinyl monomers such as acrylonitrile, acrylic acid, methacrylic acid, and C 1-6 esters of acrylic and methacrylic acid, preferably methyl methacrylate.

[0066] Specific elastomer-modified graft copolymers include those formed from styrene-butadiene-styrene (SBS), styrene-butadiene rubber (SBR), styrene-ethylene-butadiene-styrene (SEBS), ABS (acrylonitrile-butadiene-styrene), acrylonitrile-ethylene-propylene-diene-styrene (AES), styrene-isoprene-styrene (SiS), methyl methacrylate-butadiene-styrene (MBS), and styrene-acrylonitrile (SAN).

[0067] Based on the total weight of the thermoplastic polycarbonate composition, a secondary impact modifier may be present, for example, in an amount of 1 to 10 wt%, 0.5 to 5 wt%, 1.5 to 5 wt%, 2 to 5 wt%, or 2 to 3 wt% of the thermoplastic polycarbonate composition. In some aspects, no secondary impact modifier is present.

[0068] The thermoplastic polycarbonate composition may comprise a water stabilizer. In some aspects, the water stabilizer is an epoxy water stabilizer. The epoxy water stabilizer may have an Mw of 2,500 g / mol to 8,500 g / mol, or 3,000 g / mol to 6,000 g / mol. The epoxy water stabilizer may have an epoxy equivalent weight (EEW) of 180 to 2,800 g / mol, or 190 to 1,400 g / mol, or 200 to 700 g / mol. In one aspect, the epoxy water stabilizer may comprise styrene and acrylic groups, such as those described in US 2013 / 0131255 and US 6,984,694 and commercially available under the trade name JONCRYL (e.g., JONCRYL ADR 4368 (styrene-acrylate copolymer with epoxy functionality)). Other epoxy water stabilizers include JONCRYL ADR4300 (epoxidized soybean oil). The epoxy water stabilizer may be present in an amount of, for example, 0 - 1.0 wt%, 0.01 - 1.0 wt%, 0.01 - 0.5 wt%, 0.01 - 0.3 wt%, 0.1 - 0.3 wt%, or 0.1 - 0.2 wt%, each based on the total weight of the thermoplastic polycarbonate composition. In some aspects, no water stabilizer is present.

[0069] The thermoplastic polycarbonate composition may include various additives commonly incorporated into polymer compositions of this type, provided that the additives are selected so as not to significantly and adversely affect the desired properties of the thermoplastic composition, particularly the tracking resistance, flame retardancy, and / or low temperature impact properties. These additives may be incorporated at an appropriate time during the mixing of the components used to form the composition. Additives include fillers, reinforcing agents, antioxidants, heat stabilizers, light stabilizers, ultraviolet (UV) light stabilizers, plasticizers, lubricants, mold release agents, antistatic agents, colorants such as titanium dioxide, carbon black, and organic dyes, surface effect additives, radiation stabilizers, flame retardants, and anti-dripping agents. Combinations of additives may be used, such as a combination of an anti-dripping agent, a UV stabilizer, and a colorant. Generally, the additives are used in amounts that are generally known to be effective. The additive composition may be present in an amount of, for example, 0.01 to 10 wt%, 0.01 - 5.0 wt%, or 0.01 - 3 wt%, each based on the total weight of the thermoplastic polycarbonate composition.

[0070] The thermoplastic polycarbonate composition can be manufactured by various methods known in the art. For example, first, in a high-speed mixer or by manual mixing, the powdered polycarbonate and other optional components are blended, optionally with any filler. Then the blend is fed through a hopper into the feed port of a twin-screw extruder. Alternatively, at least one of the components can be incorporated into the composition by directly feeding the components into the extruder at the feed port or downstream through a side feeder, or by mixing into a masterbatch with the desired polymer and feeding it into the extruder. The extruder is typically operated at a temperature above that required to cause the composition to flow. The extrudate can be immediately quenched in a water bath and pelletized. The pellets so prepared can be, as needed, a quarter-inch long or less. These pellets can be used for subsequent molding, shaping, or forming.

[0071] As discussed above, the thermoplastic polycarbonate composition is formulated to have excellent physical properties, including excellent hydrolysis stability. Hydrolysis stability relates to the ability of a product to withstand chemical decomposition by hydrolysis, such as by maintaining molecular weight after long-term exposure to water. For high-end applications, such as at a voltage of 1500, good hydrolysis stability and tracking resistance properties without compromising impact and flame retardancy performance are desired.

[0072] In a hydrolysis chamber at 85 °C and 85% relative humidity, after 2000 hours, a molded sample of the thermoplastic polycarbonate composition can maintain a molecular weight greater than 85%.

[0073] In a hydrolysis chamber at 85 °C and 85% relative humidity, after 692 hours, according to ASTM D256, a molded sample of the thermoplastic polycarbonate composition can retain at least 60%, preferably at least 70%, 80%, 90%, or 95% of the notched Izod impact strength. A molded sample of the thermoplastic polycarbonate composition can retain at least 55%, preferably at least 60%, 65%, 70%, 75%, 80%, or 85% of the notched Izod impact strength measured at 23 °C according to ASTM D256 after 1000 hours in a hydrolysis chamber at 85 °C and 85% relative humidity.

[0074] The thermoplastic polycarbonate composition can have excellent tracking resistance properties. In some aspects, at 600 V, the number of droplets required to cause tracking can be greater than or equal to 80 drops, greater than or equal to 85 drops, greater than or equal to 90 drops, greater than or equal to 95 drops, greater than or equal to 99 drops, or greater than or equal to 100 drops, as determined according to ASTM D-3638-85. In some aspects, at 300 V, the number of droplets required to cause tracking can be greater than or equal to 80 drops, greater than or equal to 85 drops, greater than or equal to 90 drops, greater than or equal to 95 drops, greater than or equal to 99 drops, or greater than or equal to 100 drops, as determined according to ASTM D-3638-85.

[0075] Molded samples of the thermoplastic polycarbonate composition can have good low-temperature impact properties. A molded sample of the thermoplastic polycarbonate composition having a thickness of 3.2 mm can have a notched Izod impact strength (NII) greater than 260 joules per meter (J / m), greater than 300 J / m, greater than 350 J / m, greater than 400 J / m. At -30 °C according to ASTM D256, greater than 450 J / m, greater than 500 J / m, greater than 260 to 650 J / m, greater than 260 to 600 J / m, greater than 260 to 550 J / m, greater than 260 to 500 J / m, greater than 260 to 450 J / m, greater than 260 to 400 J / m, or greater than 260 to 350 J / m. A molded sample of the thermoplastic polycarbonate composition having a thickness of 3.2 mm can have a notched Izod impact strength (NII) greater than 180 joules per meter (J / m), greater than 200 J / m, greater than 250 J / m, greater than 300 J / m, greater than 350 J / m, greater than 400 J / m. At -40 °C according to ASTM D256, greater than 450 J / m, greater than 500 J / m, greater than 180 to 600 J / m, greater than 180 to 550 J / m, greater than 180 to 500 J / m, greater than 180 to 450 J / m, greater than 180 to 400 J / m, greater than 180 to 350 J / m, or greater than 180 to 300 J / m.

[0076] Molded samples of the thermoplastic polycarbonate composition can have a heat distortion temperature (HDT) greater than 120 °C measured on an eighth-inch (3.18 mm) bar according to ASTM D648 at 1.82 MPa.

[0077] The molded sample can have a UL-94 flammability test rating of V0 at a thickness of 1.5 mm.

[0078] The color of the molded sample of the composition can be described using the CIE LAB color scale. When the color is represented in CIELAB, the "L* value" describes the lightness and darkness characteristics. If the L* value = 0, the object is black. If the L* value = 100, the object is white. The molded sample of the composition can have black. Black can be characterized by L* (D65 illuminant, 10-degree observer, including UV). L* can be measured using the CIE Lab method, 10-degree observer, D65 illuminant (including UV), in reflection mode. The L* value can be, for example, 35 or less, 30 or less, or 25 or less, as determined for a molded sample of the composition having a thickness of 1 mm or 2 mm.

[0079] Tensile properties can be measured according to ASTM D638, including tensile modulus (TM), tensile strength (TS), and tensile elongation (TE). The tensile modulus can be, for example, greater than 1700, or greater than 1700 to 2400 megapascals (MPa). The tensile strength can be, for example, greater than 45, or greater than 45 to 60 MPa. The tensile elongation can be, for example, greater than 65, or greater than 65 to 140 MPa.

[0080] The melt flow rate (commonly abbreviated as MFR) of the composition can be determined using ISO 1133 or ASTM D1238. MFR measures the mass of the composition extruded through an orifice over a specified period of time at a specified temperature and load. The higher the MFR value of a polymer composition at a specific temperature, the greater the flow of the composition at that specific temperature. The melt flow rate of the composition can be measured at 300 °C and a load of 1.2 kg.

[0081] The present invention is further illustrated by the following non-limiting examples, which are non-limiting.

[0082] The present disclosure further encompasses the following aspects.

[0083] Aspect 1: A thermoplastic polycarbonate composition comprising: 5 to 28 wt% of a brominated polycarbonate; 45 to 90 wt% of a homopolycarbonate having a weight average molecular weight of 20,000 - 25,000 grams per mole measured via gel permeation chromatography using a bisphenol A homopolycarbonate standard; 0 to 15 wt% of an aromatic poly(ester-carbonate), the aromatic poly(ester-carbonate) comprising carbonate units derived from bisphenol A, resorcinol, or a combination thereof and ester units derived from bisphenol (preferably bisphenol A) or resorcinol, and terephthalic acid, isophthalic acid, or a combination thereof, wherein the molar ratio of carbonate units to ester units is in the range of 1:99 to 99:1; 2 to 10 wt% of a core-shell impact modifier; 1 wt% to 7 wt% of an α,β-unsaturated glycidyl ester copolymer impact modifier; 0.6 wt% to 3.5 wt% of a coloring composition comprising titanium dioxide and carbon black; 0 to 1 wt% of a water stabilizer, preferably an epoxy water stabilizer; optionally, 0.1 to 10 wt% of an additive composition; wherein the wt% of each component is based on the total weight of the composition and totals 100 wt%.

[0084] Aspect 2: The thermoplastic polycarbonate composition according to Aspect 1, wherein a molded sample of the composition does not show tracking after at least 80 drops of a 0.1% ammonium chloride aqueous solution, as determined by ASTM D-3638-85 at 300 volts, and does not show tracking after at least 80 drops of a 0.1% ammonium chloride aqueous solution, as determined by ASTM D-3638-85 at 600 volts.

[0085] Aspect 3: The thermoplastic polycarbonate composition according to Aspect 1 or 2, wherein the molded sample of the composition has a black appearance, wherein according to the CIE 1976 Lab method, observed at 10 degrees, with a D65 illuminant including UV, measured in reflection mode, the CIE L* is less than 35; has a thickness of 1.5 mm and has a UL 94 flame retardant test rating of V0; has a thickness of 3.2 mm and has a notched Izod impact greater than 260 joules / m at -30 °C according to ASTM D256; or a combination thereof.

[0086] Aspect 4: The thermoplastic polycarbonate composition according to any one of the preceding aspects, wherein the molded sample of the composition retains a molecular weight greater than 73% after 2000 hours in a hydrolysis chamber at 85 °C and 85% relative humidity.

[0087] Aspect 5: The thermoplastic polycarbonate composition according to any one of the preceding aspects, wherein the brominated polycarbonate has a bromine content of 24 to 27.5 wt% based on the total weight of the brominated polycarbonate, preferably, wherein the brominated polycarbonate comprises brominated bisphenol A polycarbonate units.

[0088] Aspect 6: The thermoplastic polycarbonate composition according to any one of the preceding aspects, wherein there is no poly(ester - carbonate), no water stabilizer, no poly(carbonate - siloxane); or a combination thereof.

[0089] Aspect 7: The thermoplastic polycarbonate composition according to any one of the preceding aspects, wherein the homopolycarbonate comprises a bisphenol A homopolycarbonate having a melt flow rate of 20 to 35 g / 10 min at 300 °C and a 1.2 kg load as determined by ISO 1133.

[0090] Aspect 8: The thermoplastic polycarbonate composition according to any one of the preceding aspects, wherein the colorant composition comprises 0.5 - 1.5 wt% titanium dioxide and 0.1 - 0.5 wt% carbon black.

[0091] Aspect 9: The thermoplastic polycarbonate composition according to any one of the preceding aspects, wherein an aromatic poly(ester - carbonate) is present and is a poly(carbonate - bisphenol phthalate) comprising 1 - 50 wt% aromatic carbonate units and 50 - 99 wt% bisphenol phthalate units, each based on the total weight of the carbonate units and bisphenol phthalate units.

[0092] Aspect 10: The thermoplastic polycarbonate composition according to any one of the preceding aspects, wherein an aromatic poly(ester - carbonate) is present and has the following formula:

[0093]

[0094] wherein the weight ratio of carbonate unit x to ester unit y is from 10:90 to 45:55, and the ester unit has a molar ratio of isophthalate to terephthalate from 98:2 to 88:12.

[0095] Aspect 11: A thermoplastic polycarbonate composition according to any one of the preceding aspects, wherein the weight ratio of carbonate unit x to ester unit y is from 75:25 to 85:15.

[0096] Aspect 12: A thermoplastic polycarbonate composition according to any one of the preceding aspects, wherein the core-shell impact modifier comprises a silicone elastomer core and a methyl (methacrylate) copolymer shell; the α,β-unsaturated glycidyl ester copolymer impact modifier comprises poly(ethylene-co-glycidyl acrylate), poly(ethylene-co-glycidyl methacrylate), poly(ethylene-co-glycidyl methacrylate-co-methyl acrylate), poly(ethylene-co-glycidyl methacrylate-co-ethyl acrylate), poly(ethylene-co-glycidyl methacrylate-co-vinyl acetate), or a combination thereof, preferably poly(ethylene-co-glycidyl methacrylate), poly(ethylene-co-methyl acrylate-co-glycidyl methacrylate), or a combination thereof; or a combination thereof.

[0097] Aspect 13: A thermoplastic polycarbonate composition according to any one of the preceding aspects, comprising: 5-25 wt%, preferably 10 to 25 wt% of a brominated polycarbonate; 1-55 wt% of a bisphenol A homopolycarbonate prepared by an interfacial process; 15-55 wt%, preferably 20 to 50 wt% of a bisphenol A homopolycarbonate prepared by a melt process; 3-9 wt%, preferably 4 to 8 wt% of a core-shell silicone-(meth)acrylate impact modifier; 2-8 wt%, preferably 2 to 5 wt% of an α,β-unsaturated glycidyl ester copolymer impact modifier; and 0.5-1.5 wt% of titanium dioxide; and 0.1-0.5 wt% of carbon black, wherein the wt% of each component is based on the total weight of the composition and totals 100 wt%.

[0098] Aspect 14: An article comprising a thermoplastic polycarbonate composition according to any one of the preceding aspects, preferably wherein the article is an electrical component, more preferably an electrical connector.

[0099] Aspect 15: A method for forming an article according to Aspect 14, comprising molding, casting, or extruding the composition to provide the article.

[0100] Compositions, methods, and articles of manufacture can alternatively include, consist of, or consist essentially of any suitable materials, steps, or components disclosed herein. Compositions, methods, and articles of manufacture can additionally or alternatively be formulated so as to be free or substantially free of any materials (or substances), steps, or components that would otherwise be unnecessary to achieve the functions or objectives of the compositions, methods, and articles of manufacture.

[0101] All ranges disclosed herein include the endpoints, and the endpoints can be combined independently of each other (e.g., a range of "up to 25 wt%, or more specifically, 5 wt% to 20 wt%" includes the endpoints and all intermediate values of the range of "5 wt% to 25 wt%", etc.). "Combination" includes blends, mixtures, alloys, reaction products, etc. The terms "first", "second", etc. do not denote any order, quantity, or importance, but are used to distinguish one element from another. Unless otherwise indicated herein or clearly contradicted by the context, the terms "a", "an", and "the" do not denote a limitation of quantity and are to be construed as covering both the singular and the plural. Unless otherwise expressly stated, "or" means "and / or". References throughout the specification to "some aspects", "one aspect", etc. mean that the particular elements described in connection with that aspect are included in at least one aspect described herein, and may or may not be present in other aspects. In addition, it should be understood that the described elements can be combined in any suitable manner in the various aspects. "Their combination" is open-ended and includes any combination comprising at least one of the recited components or characteristics, optionally together with other similar or equivalent components or characteristics not recited.

[0102] Unless otherwise specified herein to the contrary, all test standards are the latest standards in effect as of the filing date of this application, or, if priority is claimed, as of the filing date of the earliest priority application in which the test standard appears.

[0103] Unless otherwise defined, technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains. All cited patents, patent applications, and other reference documents are incorporated herein by reference in their entirety. However, if a term in this application contradicts or conflicts with a term in the incorporated reference documents, the term from this application prevails over the conflicting term from the incorporated reference documents.

[0104] Compounds are described using standard nomenclature. For example, any position not substituted by any designated group should be understood to have a valence filled by a designated bond or a hydrogen atom. A dash ("-") not between two letters or symbols is used to indicate the point of attachment of a substituent. For example, -CHO is attached through the carbon of the carbonyl group.

[0105] The term "alkyl" refers to a branched or straight-chain, unsaturated aliphatic hydrocarbon group, for example, methyl, ethyl, n-propyl, isopropyl, n-butyl, sec-butyl, tert-butyl, n-pentyl, sec-pentyl, and n-hexyl and sec-hexyl. "Alkenyl" refers to a straight-chain or branched monovalent hydrocarbon group having at least one carbon-carbon double bond (e.g., vinyl (-HC=CH2)). "Alkoxy" refers to an alkyl group linked via oxygen (i.e., alkyl-O-), such as methoxy, ethoxy, and sec-butoxy groups. "Alkylene" refers to a straight-chain or branched, saturated divalent aliphatic hydrocarbon group (e.g., methylene (-CH2-) or propylene (-(CH2)3-)). "Cycloalkylene" refers to a divalent cyclic alkylene group, -C n H 2n-x , where X is the number of hydrogens replaced by one or more cyclizations. "Cycloalkenyl" means a monovalent group having one or more rings and one or more carbon-carbon double bonds in the ring, where all ring members are carbon (e.g., cyclopentyl and cyclohexyl). "Aryl" refers to an aromatic hydrocarbon group containing a specified number of carbon atoms, such as phenyl, tropone, indanyl, or naphthyl. "Arylene" refers to a divalent aryl group. "Alkylarylene" refers to an arylene group substituted by an alkyl group. "Arylalkylene" refers to an alkylene group substituted by an aryl group (e.g., benzyl). The prefix "halo" refers to a group or compound including one or more of the substituents fluorine, chlorine, bromine, or iodine. Combinations of different halogen groups (e.g., bromine and fluorine), or only chlorine groups, may be present. The prefix "hetero" refers to a compound or group including at least one ring member that is a heteroatom (e.g., 1, 2, or 3 heteroatoms), where the heteroatoms are each independently N, O, S, Si, or P. "Substituted" means that a compound or group is substituted by at least one (e.g., 1, 2, 3, or 4) substituents, which may each independently be C 1-9 alkoxy, C 1-9 haloalkoxy, nitro (-NO2), cyano (-CN), C 1-6 alkylsulfonyl (-S(=O)2-alkyl), C 6-12 arylsulfonyl (-S(=O)2-aryl) thiol (-SH), thiocyanato (-SCN), toluenesulfonyl (CH3-C6H4SO2-), C 3-12 cycloalkyl, C 2-12 alkenyl, C 5-12 cycloalkenyl, C 6-12 aryl, C 7-13 arylalkylene, C 4-12 heterocycloalkyl and C 3-12 heteroaryl rather than hydrogen, provided that the normal valences of the substituting atoms are not exceeded. The number of carbon atoms indicated in a group does not include any substituents. For example, -CH2CH2CN is a C2 alkyl group substituted by a nitrile.

[0106] Although specific aspects have been described, alternatives, modifications, variations, improvements, and substantial equivalents that are not presently foreseen or may not be presently foreseen to those skilled in the art of the application can be contemplated. Accordingly, the appended claims as submitted and the claims into which they may be amended are intended to cover all such alternatives, modifications, variations, improvements, and substantial equivalents.

[0107] Example

[0108] The following components are used in the example. Unless otherwise specifically indicated, the amount of each component is wt% based on the total weight of the composition.

[0109] Use the materials shown in Table 1.

[0110] Table 1.

[0111]

[0112] Prepare test samples as follows and use the following test methods.

[0113] A typical compounding procedure is described as follows: Premix all raw materials and then extrude using a twin-screw extruder. Knead the composition in the molten state, extrude, cool through a water bath, and pelletize. Typical extrusion settings are listed in Table 2.

[0114] Table 2.

[0115]

[0116]

[0117] After drying the extruded pellets at 120 °C for 3 hours using injection molding, the extruded pellets are molded into test samples (parameters see Table 3).

[0118] Table 3

[0119]

[0120] Sample preparation and test methods are described in Table 4.

[0121] Table 4.

[0122]

[0123] The tracking resistance performance is evaluated by measuring the tracking resistance index (PTi) according to ASTM D3638 (600 V, using a 90 mm x 1 mm or 2 mm color chip), wherein a 0.1% ammonium chloride solution is dropped onto the surface of the sample at a rate of one drop every 30 seconds. When at least 50 drops are required, a qualified result is obtained. Test 5 chips to calculate the average value.

[0124] For hydrolysis stability evaluation, the cantilever rods were placed in a hydrolysis chamber at 85 °C and 85% relative humidity (RH) for a predetermined time interval. The samples were then removed from the oven for characterization of molecular weight (Mw) and impact properties. Hydrolysis stability was evaluated by comparing the weight-average molecular weight of the polycarbonate before and after hydrolysis as described above. The data was converted to % retention of the initial Mw, and the data indicated as “double 85, Mw retention” is shown in the table below. Mw was determined by gel permeation chromatography (GPC). Hydrolysis stability was evaluated by comparing the notched Izod impact strength (NII) of the formulation before and after hydrolysis at 23 °C.

[0125] Impact properties were evaluated by notched Izod impact testing (NII) according to ASTM D256, using bars (63.5 mm x 12.7 mm x 3.2 mm) at temperatures of 23 °C and -30 °C.

[0126] Reflectance CIELab color data was determined on an X-rite ColorEye 7000A spectrophotometer (D65 light source, 10-degree observer, including UV).

[0127] Melt volume rate (MVR) was determined according to ASTM D1238-04 at 300 °C using a 1.2 kg weight over 10 minutes.

[0128] Heat distortion temperature (HDT) was determined according to ASTM D648 on an eighth-inch (3.18 mm) bar at 1.82 MPa.

[0129] Combustibility tests were performed on samples at thicknesses of 1.5, 1.2, and 1.0 mm according to Underwriter’s Laboratory (UL) UL94 standards. In some cases, a second set of 5 bars was tested to give an indication of the robustness of the rating. The following definitions as shown in Table 5 were used in this report. The total flame-out time (FOT = t1 + t2) of all 5 bars was determined. A V-rating was obtained for each set of 5 bars.

[0130] Table 5

[0131] t1 and / or t2 5-rod FOT Combustion droplet V0 <10 <50 No V1 <30 <250 No V2 <30 <250 Yes N.R. (No rating) >30 >250

[0132] Examples 1-9

[0133] Table 6 shows the compositions and properties of Comparative Examples 1-9.

[0134] Table 6

[0135]

[0136] *Comparative Example

[0137] The burn test ratings in Table 6 are rated as "Pass", "Fail", or "Marginal". "Pass" means that the burn test rating is V0 at the specified thickness. "Fail" means that the composition has a V1 rating, a V2 rating, or no rating as defined in Table 5. "Marginal" means that the 5-bar FOT slightly exceeds the 50-second limit required for a V0 rating.

[0138] As shown in Table 6, adding 15 wt% of PPC to the mixture of PC homopolymers PC-2 and PC-4 significantly improved the CTI at 600 V (from 65 to 95.4 drops). However, the impact resistance was adversely affected (compare Comparative Example 2 with Comparative Example 1). As shown in Comparative Example 3, adding a colorant composition containing TiO2 (1 wt%) and carbon black ("CB," 0.3 wt%), the CTI at 600 V decreased slightly (from 95.4 drops to 87.8 drops), and the CTI at 300 V was significantly improved (from 27.6 drops to 100 drops) (compare Comparative Example 3 with Comparative Example 2). In summary, the formulations of Comparative Examples 1-3 with retained Mw had good CTI at 300 and 600 V (>80 drops), but insufficient impact resistance at -30 °C (<260 J / m).

[0139] As shown by comparing Comparative Example 3 with Comparative Example 4, increasing the loading of PC-4 from 20 wt% to 30 wt% improved the burn test rating at 1.0 mm, but the CTI performance at 300 V was adversely affected. By increasing the loading of PPC (and decreasing the loading of PC-2), the HDT was improved, but the CTI performance at 600 V was adversely affected (compare Comparative Examples 5 and 6 with Comparative Example 4). In summary, the formulations of Comparative Examples 4-6 showed a V0 flame retardant test rating at 1.0 mm, but insufficient CTI performance at 300 V and 600 V (<80 drops) and insufficient impact resistance at 23 °C (<260 J / m).

[0140] In the compositions of Comparative Examples 7-9, PPC and the anti-hydrolytic agent ("CESA") were absent. The addition of a colorant composition comprising TiO2 (1 wt%) and carbon black (0.3 wt%) resulted in an improvement in the combustion test performance and impact resistance at -30 °C, as well as improved CTI performance at 300 V (compare Comparative Example 8 and Comparative Example 7). The colorant composition was absent in Comparative Example 9 as compared to Comparative Example 8. Comparative Example 9 had an increased loading of BPA homopolycarbonate prepared by the interfacial process ("PC-2") and a decreased loading of BPA homopolycarbonate prepared by the melt process ("PC-4"), resulting in a loss of the V0 flame retardancy test rating at 1.5 mm and 1.2 mm thicknesses and an adverse effect on the CTI performance at 600 V. In summary, all formulations in this group provided sufficient impact resistance (Ni - 30 °C, > 260 J / m), but did not provide the desired combination of a V0 combustion test rating at 1.5 and 1.2 mm thicknesses and sufficient CTI performance at both 300 V and 600 V.

[0141] Examples 10 - 20

[0142] Table 7 shows the compositions and properties of Examples 10 - 20.

[0143] Table 7.

[0144]

[0145] As shown in Table 7, the molded compositions of Examples 10 - 20 provided: the required CTI performance at 300 and 600 V (i.e., greater than 80 drops); a black appearance (i.e., CIE L* less than 35); and a V0 UL-94 combustion test rating at 1.5 mm thickness.

Claims

1. A thermoplastic polycarbonate composition comprising: 5 to 28 wt% of a brominated polycarbonate; 45 to 90 wt% of a homopolycarbonate having a weight average molecular weight of 20,000 - 25,000 g / mol measured by gel permeation chromatography using a bisphenol A homopolycarbonate standard; 0 to 15 wt% of an aromatic poly(ester - carbonate) comprising carbonate units derived from bisphenol A, resorcinol, or a combination thereof, and ester units derived from bisphenol or resorcinol, and terephthalic acid, isophthalic acid, or a combination thereof, wherein the molar ratio of carbonate units to ester units is in the range of 1:99 to 99:1; 2 to 10 wt% of a core - shell impact modifier; 2 wt% to 5 wt% of an α,β - unsaturated glycidyl ester copolymer impact modifier, wherein the α,β - unsaturated glycidyl ester copolymer impact modifier comprises poly(ethylene - co - glycidyl acrylate), poly(ethylene - co - glycidyl methacrylate), poly(ethylene - co - glycidyl methacrylate - co - methyl acrylate), poly(ethylene - co - glycidyl methacrylate - co - ethyl acrylate), poly(ethylene - co - glycidyl methacrylate - co - vinyl acetate), or a combination thereof; 0.6 wt% to 3.5 wt% of a coloring composition comprising titanium dioxide and carbon black; 0 to 1 wt% of a water stabilizer; Optionally, 0.1 to 10 wt% of an additive composition; wherein the wt% of each component is based on the total weight of the composition and totals 100 wt%.

2. The thermoplastic polycarbonate composition according to claim 1, wherein A molded sample of the composition; Before at least 80 drops of 0.1% ammonium chloride aqueous solution measured at 300 volts as determined by ASTM D - 3638 - 85, does not show tracking, and Before at least 80 drops of 0.1% ammonium chloride aqueous solution measured at 600 volts as determined by ASTM D - 3638 - 85, does not show tracking.

3. The thermoplastic polycarbonate composition according to claim 1 or 2, wherein A molded sample of the composition; Having a black appearance, wherein as measured in reflection mode according to the CIE 1976 Lab method, 10 - degree observer, D65 illuminant, including UV, CIE L* is less than 35; Having a thickness of 1.5 mm and having a UL 94 flame retardant test rating of V0; Having a thickness of 3.2 mm and having a notched Izod impact greater than 260 joules / m at - 30 °C according to ASTM D256; Or a combination thereof.

4. The thermoplastic polycarbonate composition according to claim 1, wherein, The molded sample of the composition retains a molecular weight of greater than 73% after 2000 hours in a hydrolysis chamber at 85 °C and 85% relative humidity.

5. The thermoplastic polycarbonate composition according to claim 1, wherein, Based on the total weight of the brominated polycarbonate, the brominated polycarbonate has a bromine content of 24 to 27.5 wt%.

6. The thermoplastic polycarbonate composition according to claim 1, wherein There is no aromatic poly(ester - carbonate), no water stabilizer, no poly(carbonate - siloxane); or a combination thereof.

7. The thermoplastic polycarbonate composition according to claim 1, wherein, The homopolycarbonate comprises a bisphenol A homopolycarbonate having a melt flow rate of 20 to 35 g / 10 minutes at 300 °C and 1.2 kg load as determined by ISO 1133.

8. The thermoplastic polycarbonate composition according to claim 1, wherein The coloring composition contains 0.5 - 1.5 wt% titanium dioxide and 0.1 - 0.5 wt% carbon black.

9. The thermoplastic polycarbonate composition according to claim 1, wherein, The aromatic poly(ester - carbonate) is present and has the following formula: where the weight ratio of carbonate unit x to ester unit y is 10:90 - 45:55, and the ester unit has a molar ratio of isophthalate to terephthalate of 98:2 - 88:

12.

10. The thermoplastic polycarbonate composition according to claim 9, wherein, The weight ratio of carbonate unit x to ester unit y is 75:25 - 85:

15.

11. The thermoplastic polycarbonate composition according to claim 1, wherein the core - shell impact modifier comprises a silicone elastomer core and a (meth)acrylate copolymer shell.

12. The thermoplastic polycarbonate composition according to claim 1, comprising: 5 - 20 wt% of the brominated polycarbonate; 1 - 55 wt% of bisphenol A homopolycarbonate prepared by an interfacial method; 15 - 55 wt% of bisphenol A homopolycarbonate prepared by a melt method; 3 - 9 wt% of a core - shell silicone - (meth)acrylate impact modifier; 2 - 5 wt% of poly(ethylene - co - glycidyl methacrylate - co - methyl acrylate); and 0.5 - 1.5 weight% of titanium dioxide; and 0.1 - 0.5 wt% of carbon black, where the wt% of each component is based on the total weight of the composition and totals 100 wt%.

13. An article comprising the thermoplastic polycarbonate composition according to any one of the preceding claims.

14. A method for forming the article according to claim 13, comprising molding, casting, or extruding the composition to provide the article.

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