Electromobility components

Abstract

The present invention relates to: creep-resistant electromobility components having a colour difference ΔE <20 from the L*a*b* coordinates of a colour number in the RAL colour chart beginning with "2", comprising polymer compositions based on at least polyester and 1,3-dihydro-5,6-bis(((2-hydroxy-1-naphthyl)methylene)amino-2H-benzimidazole-2-onato(2-)-N5,N6,O5,O6)nickel; and the use of 1,3-dihydro-5,6-bis(((2-hydroxy-1-naphthyl)methylene)amino-2H-benzimidazole-2-onato(2)-N5,N6,O5,O6)nickel to produce polyester-based, creep-resistant electromobility components with a colour difference ΔE <20 from the L*a*b* coordinates of a colour number in the RAL colour chart beginning with "2".

Description

[0001] Electromobility components

[0002] The present invention relates to tracking-resistant electromobility components with a color difference AE <20 from the L*a*b* coordinates to a color number beginning with "2" in the RAL color table, containing polymer compositions based on at least one polyester and 1,3-dihydro-5,6-bis(((2-hydroxy-1-naphthyl)methylene)amino-2H-benzimidazol-2-onato(2-)-N5,N6,05,06)nickel, as well as the use of 1,3-dihydro-5,6-bis(((2-hydroxy-1-naphthyl)methylene)amino-2H-benzimidazol-2-onato(2-)-N5,N6,05,06)nickel for producing polyester-based tracking-resistant electromobility components with a color difference AE <20 from the L*a*b* coordinates to a color number beginning with "2" in the RAL color chart.

[0003] State of the art

[0004] Engineering thermoplastics such as polyester are an important material due to their good mechanical stability, chemical resistance, excellent electrical properties, and good processability, particularly in the field of automotive components. They have therefore been a key component in the production of sophisticated automotive components for many years. While the combustion engine was the dominant drive concept for many years, the search for alternative drive concepts has also given rise to new requirements regarding material selection. Electromobility plays a key role in this, in which the combustion engine is partially (hybrid vehicles [HEV, PHEV, BEV Rex]) or completely (electric vehicles [BEV, FCEV]) replaced by one or more electric motors, which typically draw their electrical energy from batteries or fuel cells.While conventional vehicles with an internal combustion engine (ICE) as their sole power source typically operate with a 12V on-board voltage system, hybrid and electric vehicles with electric motors as the drive unit require significantly higher voltages. This represents a serious additional hazard potential for the direct area and immediate vicinity of such high-voltage components, which is increasingly playing a role in technical specifications and standards. Clearly marking such hazardous areas plays a key role in preventing unintentional contact with people, especially drivers, mechanics, etc. Clear color coding of such electromobility components plays a particularly important role.The Idaho National Laboratory's Advanced Vehicle Team for HEV (Hybrid Electric Vehicle) has published a technical specification at https: / / avt.inl.gov / sites / default / files / pdf / hev / hevtechspecr1.pdf that requires clear orange color coding for all devices exposed to high voltages greater than or equal to 60 V. Components that are to be marked orange for the electric drive of vehicles, particularly motor vehicles based on battery or fuel cell technology, as well as components and systems used in electric drive units, are electromobility components within the meaning of the present invention. As electrical, live components, or components exposed to electrical voltage, tracking resistance is also an essential criterion for such electromobility components.

[0005] Tracking resistance characterizes the insulation strength of the surface (creepage distance) of insulating materials, particularly under the influence of moisture and contaminants. It defines the maximum tracking current that may occur under standardized test conditions (specified voltage, conductive layer material) in a defined test setup (electrode spacing, electrode shape). A surface can become contaminated, for example, by abrasion or dust. In the case of polymer-based components, substances can migrate to the surface and "contaminate" it. If the air humidity is sufficiently high, this can form a conductive coating through which a so-called tracking current flows. Some materials react quite sensitively to this energy input and are gradually destroyed by the electrochemical stress.The resulting carbon-containing degradation products, in turn, increase the path taken by the leakage current, possibly branching (treeing) until a breakdown occurs.

[0006] A measure of the tendency to form a conductive path, particularly in the presence of dirt and moisture, is the CTI value (Comparative Tracking Index) in volts. Typical CTI values ​​for some materials are phenolic resin: 125 V; polyimide, Kapton: 150 V; PE-LD, PE-HD (polyethylene): 600 V; polyester resin: 600 V; PTFE (polytetrafluoroethylene): 600 V. The CTI value is only standardized for voltages up to 600 V. For higher voltages, there is also the option of testing for high-voltage tracking resistance (so-called IPT value, for Inclined Plane Tracking). The CTI value indicates the voltage up to which the material surface is not conductive. The EN50124 standard establishes a relationship between insulating material groups and the CTI value: Insulating material group I = CTI > 600V; Insulating material group II = 400V < CTI < 600V; Insulating material group IIIa = 175V < CTI < 400V; Insulating material group I Hb = 100V < CTI < 175V.

[0007] The CTI value to be determined for tracking resistance within the scope of the present invention reveals the voltage up to which the base material shows no tracking when 50 drops of standardized electrolyte solutions (A or B, correspondingly KA or KB value) are applied. Measurements are taken on the surface, with one drop falling between two platinum electrodes every 30 seconds. The failure criterion is a tracking current of > 0.5

[0008] A. Details on the method for measuring the CTI value are specified in IEC 60112.

[0009] Electromobility components are known to the person skilled in the art from EP 3 947 020 B1, in which they can be, for example, distribution boxes, control units and / or cabling, designated as (172). According to the invention, electromobility components include both those components that are in direct contact with live parts and those that, in the immediate vicinity or spatial proximity thereto, serve as contact protection, warning markings or shielding, with components that are in direct contact with the live parts being preferred according to the invention. With regard to battery components, electromobility components according to the invention are preferably standard and round cell modules, cell housings, cell connectors, cell contact systems, module connectors, pressure compensation elements, seals and intelligent battery management systems.With regard to proton-exchange membrane fuel cells (PEMFCs), electromobility components are preferably modules or stack modules, metallic bipolar plates, end and media modules, and sealing systems. In an electric drive unit (EDU), electromobility components can include seals and other components, in particular functionally integrated housing covers, housing seals, shaft seals, disk carriers, and stamping packages. Finally, electromobility components within the meaning of the present invention also include shielding systems and dynamic precision parts.

[0010] CN 109 054 312 A describes polybutylene terephthalate fibres coloured with Pigment Orange 68.

[0011] WO 2014 / 175 450 A1 relates to the provision of a black colorant for electrical components with high tracking resistance based on polybutylene terephthalate. The colorant is based either on a blue organic pigment (a), a yellow organic pigment (b), and a red organic pigment (c), or on at least one combination of a blue organic pigment (d) and an orange pigment, with the proviso that none of the organic pigments (a) to (d) contains a halogen atom in the molecular structure. The orange pigments mentioned in WO 2014 / 175 450 A1 are Pigment Orange 43, Pigment Orange 68, and Pigment Orange 73.

[0012] EP 3 792 303 A1 relates to polyester or polycarbonate compositions with a 2000 RAL number. In addition to tracking resistance, the objective of EP 3 792 303 A1 is also to ensure laser marking capability, which is achieved with Pigment Orange 78, a cerium(III) sulfide / lanthanum(III) sulfide. As an optional additional component E), Pigment Orange 68 can be used together with Pigment Orange 78. JP H11 256050 A and JP H11 246775 A disclose polycarbonate compositions for electrical devices (not electromobility components) that can be colored with, among other things, Pigment Orange 68.

[0013] However, due to high processing temperatures of sometimes >300°C during compounding and injection molding, the selection of suitable colorants for the orange marking of electromobility components is very limited, especially for engineering thermoplastics such as polyester. Under extreme conditions, particularly those required in electromobility, dyes tend to migrate from the plastic matrix (blooming), which leads to a reduction in color intensity at elevated temperatures, or dyes migrate into other materials, such as neighboring plastic or rubber parts, a process known as bleeding. Such a migrating dye, caused by mechanical or physical processes, can lead to negative functional impairments. One example is leakage current, which can result from the deposition of migrated dye on the surface of electrical contacts.In electrical engineering, leakage current refers to an uncontrollable and unwanted current that flows along the surface of an insulating material between two conductors. The shortest path this leakage current takes on the insulating material's surface is called the creepage distance. These fault currents on the insulating material's surface cause changes in the insulating material over time. Therefore, the migration of constituents from plastics is generally undesirable in the vicinity of electrical components, as it can affect the properties of the plastics as well as neighboring components, potentially compromising the functionality of the electrical component.

[0014] Based on the teaching of EP 3 947 020 B1, the object of the present invention was therefore to provide tracking-resistant electromobility components based on polyesters which, on the one hand, are clearly marked and recognizable by the color orange, but at the same time do not experience any significant reduction in the CTI to be determined for tracking resistance according to IEC 60112 as a result of this color coding.

[0015] Surprisingly, it has now been found that electromobility components based on at least one polyester and 1,3-dihydro-5,6-bis(((2-hydroxy-1-naphthyl)methylene)amino-2H-benzimidazol-2-onato(2-)-N5,N6,05,06)nickel meet the required requirements, in that the colour orange is defined by a colour difference AE <20 from the L*a*b* coordinates to a colour number beginning with "2" in the RAL colour table and by using the colourant 1,3-dihydro-5,6-bis(((2-hydroxy-1-naphthyl)methylene)amino-2H-benzimidazol-2-onato(2-)-N5,N6,05,06)nickel, the tracking resistance has a maximum deviation of the CTI of 2.5% compared to a component of the same composition but without colourant, in particular without 1,3- Dihydro-5,6-bis(((2-hydroxy-1-naphthyl)methylene)amino-2H-benzimidazol-2-onato(2-)- N5,N6,O5,O6)nickel, is ensured.

[0016] Subject of the invention

[0017] The invention relates to tracking-resistant electromobility components with a color difference AE <20 from the L*a*b* coordinates to a color number starting with "2" in the RAL color table based on at least one polyester and 1,3-dihydro-5,6-bis(((2-hydroxy-1-naphthyl)methylene)amino-2H-benzimidazol-2-onato(2-)- N5,N6,O5,O6)nickel with a CTI to be determined according to IEC 60112 in the range of 425 to 600 volts and a maximum deviation of the CTI of 2.5% compared to a component of the same composition without colorant, with the proviso that 0.01 to 3 parts by mass of 1,3-dihydro-5,6-bis(((2-hydroxy-1- naphthyl)methylene)amino-2H-benzimidazol-2-onato(2-)-N5,N6,05,06)nickel can be used.

[0018] The invention preferably relates to tracking-resistant electromobility components with a color difference AE <10 from the L*a*b* coordinates to a color number beginning with "2" in the RAL color table, particularly preferably AE <5.

[0019] Preferred are tracking-resistant electromobility components in which 0.01 to 2.5 parts by mass of 1,3-dihydro-5,6-bis(((2-hydroxy-1-naphthyl)methylene)amino-2H-benzimidazol-2-onato(2-)-N5,N6,05,06)nickel are present per 100 parts by mass of polyester.

[0020] The invention further relates to the use of 1,3-dihydro-5,6-bis(((2-hydroxy-1-naphthyl)methylene)amino-2H-benzimidazol-2-onato(2-)-N5,N6,05,06)nickel for obtaining creep-resistant polyester-based electromobility components with a color difference AE <20, preferably AE <10, in particular AE <5, from the L*a*b* coordinates to a color number beginning with "2" in the RAL color table, wherein the creep resistance is determined by a CTI to be determined according to IEC 60112 in the range of 425 to 600 volts with a maximum deviation of the CTI of 2.5% compared to a component of the same composition without colorant, with the proviso that 0.01 to 3 parts by mass of 1,3-dihydro-5,6-bis(((2-hydroxy-1- naphthyl)methylene)amino-2H-benzimidazol-2-onato(2-)-N5,N6,05,06)nickel can be used.Preferably, in the use according to the invention, 0.01 to 2.5 parts by mass of 1,3-dihydro-5,6-bis(((2-hydroxy-1-naphthyl)methylene)amino-2H-benzimidazol-2-onato(2-)-N5,N6,05,06)nickel are present per 100 parts by mass of polyester.

[0021] The preparation of polymer compositions for producing electromobility components according to the invention is carried out by means of compounding and subsequent processing by injection molding, extrusion, or blow molding by mixing the polyester to be used as starting material with 1,3-dihydro-5,6-bis(((2-hydroxy-1-naphthyl)methylene)amino-2H-benzimidazol-2-onato(2-)-N5,N6,05,06)nickel, preferably in the ratio stated above, in at least one mixing tool. This gives molding compositions which either consist exclusively of these two components or contain at least one further component in addition to these two components.

[0022] For the avoidance of doubt, the scope of the present invention encompasses all definitions and parameters listed below, either general or in preferred ranges, in any combination. This also applies to the combination of the quantities specified for the individual components in relation to the claimed processes and uses. The standards cited in this application refer to the version applicable on the filing date of this invention. Unless otherwise stated, percentages are by weight.

[0023] Tracking-resistant electromobility components for electromobility according to the invention are colored orange by 1,3-dihydro-5,6-bis(((2-hydroxy-1-naphthyl)methylene)amino-2H-benzimidazol-2-onato(2-)-N5,N6,05,06)nickel, with color shades that correspond to the color number RAL2001, RAL2003, RAL2004, RAL2007, RAL2008, RAL2009, RAL2010 and RAL2011 in the RAL color system being particularly preferred and the color shades that correspond to the color number RAL2003, RAL2008, RAL 2010 and RAL2011 in the RAL color system being very particularly preferred.

[0024] Permissible "similar colors" according to the invention and encompassed by the present invention are those whose color difference in the L*a*b* system has an AE of <20, preferably an AE <10, particularly preferably AE <5, to a color number beginning with "2" in the RAL color table. For an explanation of the AE defined in EN ISO 11664-4, see, for example: https: / / de.wikipedia.org / wiki / Delta_E.

[0025] Orange

[0026] In the context of the present invention, orange is defined as a color that has a color number in the RAL color system according to https: / / de.wikipedia.org / wiki / RAL-Farbe#Orange in the RAL color table that begins with a "2". In detail, a distinction is made between

[0027] Filing date of the present invention Orange tones according to Table 1 :

[0028] Table 1

[0029] L* a* b*

[0030] RAL 2000 yellow orange 58.20 37.30 68.68

[0031] RAL 2001 red-orange 49.41 39.79 35.29

[0032] RAL 2002 blood orange 47.74 47.87 33.73

[0033] RAL 2003 pastel orange 66.02 41.22 52.36

[0034] RAL 2004 pure orange 56.89 50.34 49.81

[0035] RAL 2005 Bright Orange 72.27 87.78 82.31

[0036] RAL 2007 Bright Orange 76.86 47.87 97.63

[0037] RAL 2008 light red orange 60.33 46.91 60.52

[0038] RAL 2009 Traffic Orange 55.83 47.79 48.83

[0039] RAL 2010 Signalorange 55,39 40,10 42,42

[0040] RAL 2011 Tieforange 59,24 40,86 64,50

[0041] RAL 2012 Lachsorange 57,75 40,28 30,66

[0042] RAL 2013 Perlorange 40,73 32,14 34,92

[0043] Table 1 shows the device-independent CIE L*a*b* color values ​​for the respective RAL value: L* stands for the luminance, a* describes the color coordinates along the red-green axis, and b* describes the color coordinates along the yellow-blue axis using D65 standard illuminant with a 10° field of view of a standard observer. The color model is standardized in EN ISO 11664-4 "Colorimetry - Part 4: CIE 1976 L*a*b* Color space." For information on the L*a*b* color space (also: CIELAB), see: https: / / de.wikipedia.org / wiki / Lab-Farbraum. Each color in the color space is defined by a color coordinate with the Cartesian coordinates {L*, a*, b*}. The a*b* coordinate plane was constructed using complementary color theory. Green and red are opposite each other on the a* axis, while the b* axis runs between blue and yellow. Complementary colors are 180° opposite each other, and all achromatic colors lie in their center (the coordinate origin a*=0, b*=0).

[0044] The L* axis describes the brightness (luminance) of the color with values ​​from 0 to 100. In the representation, this is perpendicular to the a*b* plane at the zero point. It can also be called the neutral gray axis because all achromatic colors (shades of gray) are contained between the endpoints black (L*=0) and white (L*=100). The a* axis describes the green or red component of a color, with negative values ​​representing green and positive values ​​representing red. The b* axis describes the blue or yellow component of a color, with negative values ​​representing blue and positive values ​​representing yellow. The a* values ​​range from approximately -170 to +100, and the b* values ​​from -100 to +150, with maximum values ​​only being reached at medium brightness of certain color tones. The CIELAB color solid is at its greatest extent in the medium brightness range, but this height and size vary depending on the color range.

[0045] Further preferred embodiments of the invention

[0046] In a preferred embodiment, the invention relates to tracking-resistant electromobility components with a color difference AE <20 from the L*a*b* coordinates to a color number beginning with "2" in the RAL color table, containing, in addition to at least one polyester and 1,3-dihydro-5,6-bis(((2-hydroxy-1-naphthyl)methylene)amino-2H-benzimidazol-2-onato(2-)-N5,N6,05,06)nickel, at least one filler and / or reinforcing material, preferably in an amount of 1 to 150 parts by mass, particularly preferably in an amount of 5 to 80 parts by mass, very particularly preferably in an amount of 10 to 50 parts by mass, in each case based on 100 parts by mass of polyester.

[0047] In a further preferred embodiment, the invention relates to tracking-resistant electromobility components with a color difference AE <20 from the L*a*b* coordinates to a color number beginning with "2" in the RAL color table, containing, in addition to at least one polyester and 1,3-dihydro-5,6-bis(((2-hydroxy-1-naphthyl)methylene)amino-2H-benzimidazol-2-onato(2-)-N5,N6,05,06)nickel, at least one flame retardant, preferably in an amount of 3 to 100 parts by mass, particularly preferably in an amount of 5 to 80 parts by mass, very particularly preferably in an amount of 10 to 50 parts by mass, in each case based on 100 parts by mass of polyester.

[0048] In a further preferred embodiment, the invention relates to tracking-resistant electromobility components with a color difference AE <20 from the L*a*b* coordinates to a color number beginning with "2" in the RAL color table, containing, in addition to at least one polyester and 1,3-dihydro-5,6-bis(((2-hydroxy-1-naphthyl)methylene)amino-2H-benzimidazol-2-onato(2-)-N5,N6,05,06)nickel, at least one additive, preferably in an amount of 0.01 to 80 parts by mass, particularly preferably in an amount of 0.05 to 50 parts by mass, very particularly preferably in an amount of 0.1 to 30 parts by mass, in each case based on 100 parts by mass of polyester.

[0049] C2-Cio polyalkylene terephthalates as polyesters

[0050] C2-C10-polyalkylene terephthalates, preferably used in the context of the present invention, are reaction products of an alcohol moiety having 2 to 10 carbon atoms in the alcohol moiety and terephthalic acid. C2-C10-polyalkylene terephthalates are known to the person skilled in the art and are adequately described in the literature. They contain an aromatic ring in the main chain, which originates from terephthalic acid, and an aliphatic moiety, which originates from a dihydroxy compound. The aromatic ring of terephthalic acid can also be substituted. Preferred substituents are halogens or C1-C4-alkyl groups. Preferred halogens are chlorine or bromine. Preferred C1-C4-alkyl groups are methyl, ethyl, n-propyl, or n-, i-, or t-butyl groups.

[0051] Preferably used C2-C polyalkylene terephthalates can be prepared by reacting aromatic dicarboxylic acids, their esters or other ester-forming derivatives with aliphatic dihydroxy compounds in a manner known to the person skilled in the art.

[0052] In the case of C2-C6 polyalkylene terephthalates, a portion of the terephthalic acid used in their preparation, up to 30 mol%, can be replaced by 2,6-naphthalenedicarboxylic acid, isophthalic acid, or mixtures thereof. Up to 70 mol%, preferably not more than 10 mol%, of the terephthalic acid can be replaced by aliphatic or cycloaliphatic dicarboxylic acids such as adipic acid, azelaic acid, sebacic acid, dodecanedioic acids, and cyclohexanedicarboxylic acids.

[0053] Of the aliphatic dihydroxy compounds, diols having 2 to 6 carbon atoms, especially 1,2-ethanediol, 1,3-propanediol, 1,4-butanediol, 1,6-hexanediol, 1,4-hexanediol, 1,4-cyclohexanediol, 1,4-cyclohexanedimethanol, and neopentyl glycol, or mixtures thereof, are preferred. Particularly preferred polyalkylene terephthalates are derived from alkanediols having 2 to 4 carbon atoms. Of these, polyethylene terephthalate (PET), polypropylene terephthalate, and polybutylene terephthalate (PBT), or mixtures thereof, are particularly preferred. Also preferred are PET and / or PBT which contain up to 1 wt.%, preferably up to 0.75 wt.%, of 1,6-hexanediol and / or 2-methyl-1,5-pentanediol as further monomer units.

[0054] Preferably, C2-C10 polyalkylene terephthalates to be used as polyesters according to the invention have a viscosity number to be determined according to ISO 1628 in the range from 50 to 220, preferably in the range from 80 to 160, measured in a 0.5% by weight solution in a phenol / o-dichlorobenzene mixture, weight ratio 1:1 at 25°C.

[0055] C2-C4 polyalkylene terephthalates preferably used as polyesters according to the invention preferably have a carboxyl end group content of up to 100 meq / kg polyester, more preferably up to 50 meq / kg polyester, and especially preferably up to 40 meq / kg polyester. Such C2-C4 polyalkylene terephthalates can be prepared, for example, by the process of DE-A 44 01 055. The carboxyl end group content is usually determined by titration methods, in particular potentiometry.

[0056] Particularly preferred C2-C12 polyalkylene terephthalates for use as polyesters are produced using Ti catalysts. These preferably have a residual Ti content of <250 ppm, more preferably <200 ppm, and most preferably <150 ppm after polymerization.

[0057] The polybutylene terephthalate (PBT) [CAS No. 24968-12-5] preferably used as polyester according to the invention is prepared from terephthalic acid or its reactive derivatives and butanediol by known methods (Kunststoff-Handbuch, Vol. VIII, pp. 695-743, Karl Hanser Verlag, Munich 1973).

[0058] The PBT to be used as polyester preferably contains at least 80 mol%, preferably at least 90 mol%, based on the dicarboxylic acid,

[0059] Terephthalic acid residues.

[0060] PBT, which is preferably used as polyester according to the invention, can be used in a

[0061] Embodiment containing, in addition to terephthalic acid residues, up to 20 mol% of residues of other aromatic dicarboxylic acids having 8 to 14 C atoms or residues of aliphatic dicarboxylic acids having 4 to 12 C atoms, in particular residues of phthalic acid, isophthalic acid, naphthalene-2,6-dicarboxylic acid, 4,4'-diphenyldicarboxylic acid, succinic acid, adipic acid, sebacic acid, azelaic acid, cyclohexanediacetic acid, cyclohexanedicarboxylic acid, 2,5-furandicarboxylic acid.

[0062] PBT to be used preferably as a polyester according to the invention can, in one embodiment, contain, in addition to butanediol, up to 20 mol% of other aliphatic diols having 3 to 12 C atoms or up to 20 mol% of cycloaliphatic diols having 6 to 21 C atoms, preferably residues of propanediol-1,3, 2-ethylpropanediol-1,3, neopentyl glycol, pentanediol-1,5, hexanediol-1,6, 1,4-cyclohexanedimethanol, 3-methylpentanediol-2,4, 2-

[0063] Methylpentanediol-2,4, 2,2,4-trimethylpentanediol-1,3, 2,2,4-trimethylpentanediol-1,5, 2-ethylhexanediol-1,3, 2,2-diethylpropanediol-1,3, hexanediol-2,5, 1,4-di-(ß-hydroxyethoxy)-benzene, 2,2-bis-(4-hydroxycyclohexyl)-propane, 2,4-dihydroxy-1,1,3,3-tetramethylcyclobutane, 2,2-bis-(3-ß-hydroxyethoxyphenyl)-propane and 2,2-bis-(4-hydroxypropoxyphenyl)-propane.

[0064] PBT, which is preferably used as a polyester, has an intrinsic viscosity according to EN-ISO 1628 / 5 in the range of 40 to 170 cm 3 / g, particularly preferably in the range of 50 to 150cm 3 / g, especially preferred in the range of 65 to 135cm 3 / g, each measured in an Ubbelohde viscometer in phenol / o-dichlorobenzene (1:1 parts by weight) at 25°C. The intrinsic viscosity iV, also known as the Staudinger index or limiting viscosity, is proportional to the average molecular mass according to the Mark-Houwink equation and is the extrapolation of the viscosity number VN for the case of vanishing polymer concentrations. It can be estimated from series of measurements or by using suitable approximate methods (e.g. Billmeyer). The VN [ml / g] is obtained from measuring the solution viscosity in a capillary viscometer, e.g. an Ubbelohde viscometer. The solution viscosity is a measure of the average molecular weight of a plastic. It is determined on dissolved polymer using different solvents (m-cresol, tetrachloroethane, phenol, 1,2-dichlorobenzene, etc.) and concentrations.The viscosity number (VN) allows for monitoring the processing and performance properties of plastics. Thermal stress on the polymer, aging processes, exposure to chemicals, weathering, and light can be investigated through comparative measurements. See also: http: / / de.wikipedia.org / wiki / Viskosimetrie and http: / / de.wikipedia.org / wiki / Mark-Houwink-Gleichung.

[0065] PBT, which is preferably used as a polyester, can also be used in a blend with other polymers. PBT blends used according to the invention are produced by compounding. During such compounding, conventional additives, in particular mold release agents or elastomers, can also be mixed in the melt, thereby improving the properties of the blends.

[0066] PBT to be used preferably according to the invention can be obtained as Pocan® B 1300 from Lanxess Deutschland GmbH, Cologne.

[0067] Polycarbonate as polyester

[0068] According to the invention, at least one thermoplastic from the group of polycarbonates can also be used as polyester.

[0069] Polycarbonates to be used with preference according to the invention are those homopolycarbonates or copolycarbonates based on bisphenols of the general formula (I),

[0070] HO-Z-OH (I) where Z is a divalent organic radical having 6 to 30 C atoms which contains one or more aromatic groups.

[0071] Preferably, at least one polycarbonate based on bisphenols of the formula (Ia) is used as the polyester wherein

[0072] A represents a single bond or a radical from the series Ci-Cs-alkylene, C2-C5-alkylidene, Cs-Cs-cycloalkylidene, -O-, -SO-, -CO-, -S-, -SO2-, C6-Ci2-arylene, to which further aromatic rings, optionally containing heteroatoms, may be condensed, or A represents a radical of the formula (II) or (III) wherein

[0073] R 7 and R 8 can be selected individually for each Y and independently represent hydrogen or Ci-Ce-alkyl, preferably hydrogen, methyl or ethyl,

[0074] B is each Ci-Ci2-alkyl, preferably methyl, halogen, preferably chlorine and / or bromine, x is each independently 0, 1 or 2, p is 1 or 0,

[0075] Y stands for carbon, and m stands for an integer from 4 to 7, preferably 4 or 5, with the proviso that at least one Y (carbon atom) R 7 and R 8simultaneously represent alkyl.

[0076] In a preferred embodiment, when m is 4, Y is -CR 7 R 8 -CR 7 R 8 -CR 7 R 8 -CR 7 R 8 -; if m stands for 5, Y stands for - CR 7 R 8 -CR 7 R 8 -CR 7 R 8 -CR 7 R 8 -CR 7 R 8 -; if m stands for 6, Y stands for -CR 7 R 8 -CR 7 R 8 -CR 7 R 8 -CR 7 R 8 - CR 7 R 8 -CR 7 R 8 -; and if m stands for 7, Y stands for -CR 7 R 8 -CR 7 R 8 - CR 7 R 8 -CR 7 R 8 -CR 7 R 8 - CR 7 R 8 -CR 7 R 8 -.

[0077] Preferred bisphenols containing the general formula (II) are bisphenols from the group dihydroxydiphenyls, bis-(hydroxyphenyl)-alkanes, bis-(hydroxyphenyl)-cycloalkanes, indanebisphenols, bis-(hydroxyphenyl)-sulfides, bis-(hydroxyphenyl)-ethers, bis-(hydroxyphenyl)-ketones, bis-(hydroxyphenyl)-sulfones, bis-(hydroxyphenyl)-sulfoxides and a,a'-bis-(hydroxyphenyl)-diisopropylbenzenes.

[0078] Derivatives of the bisphenols mentioned, which are preferably obtainable by alkylation or halogenation on the aromatic rings of the bisphenols mentioned, are also preferably used bisphenols containing the general formula (II).

[0079] Besonders bevorzugte Bisphenole enthaltend die allgemeine Formel (II) sind Hydrochinon, Resorcin, 4,4’-Dihydroxydiphenyl, Bis-(4-hydroxyphenyl)sulfid, Bis-(4- hydroxyphenyl)sulfon, Bis-(3,5-dimethyl-4-hydroxyphenyl)-methan, Bis-(3,5-dimethyl-4- hydroxyphenyl)-sulfon, 1 ,1 -Bis-(3,5-dimethyl-4-hydroxyphenyl)-p / m-diisopropylbenzol, 1 ,1 - Bis-(4-hydroxyphenyl)-1 -phenyl-ethan, 1 ,1 -Bis-(3,5-dimethyl-4-hydroxyphenyl)-cyclo- hexan, 1 ,1 -Bis-(4-hydroxyphenyl)-3-methylcyclohexan, 1 ,1 -Bis-(4-hydroxyphenyl)-3,3- dimethylcyclohexan, 1 ,1 -Bis-(4-hydroxyphenyl)-4-methylcyclohexan. 1 , 1 -Bis-(4- hydroxyphenyl)-cyclohexan, 1 ,1 -Bis-(4-hydroxyphenyl)-3,3,5-trimethylcyclohexan, 2,2-Bis- (3,5-dichlor-4-hydroxyphenyl)-propan, 2,2-Bis-(3-methyl-4-hydroxyphenyl)-propan, 2,2-Bis- (3,5-dimethyl-4-hydroxyphenyl)-propan, 2,2-Bis-(4-hydroxyphenyl)-propan (d.h.Bisphenol A), 2,2-bis-(3-chloro-4-hydroxyphenyl)-propane, 2,2-bis-(3,5-dibromo-4-hydroxyphenyl)-propane, 2,4-bis-(4-hydroxyphenyl)-2-methylbutane, 2,4-bis-(3,5-dimethyl-4-hydroxyphenyl)-2-methylbutane, a,a'-bis-(4-hydroxyphenyl)-o-diisopropylbenzene, a,a'-bis-(4-hydroxyphenyl)-m-diisopropylbenzene (i.e., bisphenol M), a,a'-bis-(4-hydroxyphenyl)-p-diisopropylbenzene, and indanebisphenol. The bisphenols described according to the general formula (II) can be prepared by processes known to those skilled in the art, preferably from the corresponding phenols and ketones.

[0080] Polycarbonates used as polyesters can also be produced by known processes. Preferred processes for producing polycarbonates include, for example, production from bisphenols with phosgene using the interfacial process, or from bisphenols with phosgene using the homogeneous phase process, the so-called pyridine process, or from bisphenols with carbonic acid esters using the melt transesterification process. The bisphenols mentioned and their production processes are described, for example, in the monograph by H. Schnell, "Chemistry and Physics of Polycarbonates," Polymer Reviews, Volume 9, p.77-98, Interscience Publishers, New York, London, Sidney, 1964 and in US-A 3,028,635, in US-A 3,062,781, in US-A 2,999,835, in US-A 3,148,172, in US-A 2,991,273, in US-A 3,271,367, in US-A 4,982,014, in US-A 2,999,846, in DE-A 1,570,703, in DE-A 2,063,050, in DE-A 2,036,052, in DE-A 2,211,956, in DE-A 3,832,396, and in FR-A 1,561 518 as well as in the Japanese Laid-open publications with application numbers JP-A 62039 1986, JP-A 62040 1986 and JP-A 105550 1986.

[0081] 1,1-Bis-(4-hydroxyphenyl)-3,3,5-trimethylcyclohexane and its preparation is described, for example, in US-A 4 982 014.

[0082] Indanebisphenols and their preparation are described, for example, in US-A 3288864, in JP-A 60 035 150 and in US-A 4 334 106. Indanebisphenols can be prepared, for example, from isopropenylphenol or its derivatives or from dimers of isopropenylphenol or its derivatives in the presence of a Friedel-Craft catalyst in organic solvents.

[0083] The melt transesterification process is described in H. Schnell, "Chemistry and Physics of Polycarbonates", Polymer Reviews, Volume 9, pp. 44 to 51, Interscience Publishers, New York, London, Sidney, 1964 and in DE-A 1 031 512.

[0084] In the production of polycarbonate, raw materials and auxiliaries with a low degree of impurities are preferably used. Particularly in production by the melt transesterification process, the bisphenols and carbonic acid derivatives used should be as free as possible from alkali ions and alkaline earth ions. Such pure raw materials can be obtained, for example, by recrystallizing, washing, or distilling the carbonic acid derivatives, in particular carbonic acid esters, and the bisphenols. Polycarbonates preferably used as polyesters according to the invention preferably have a weight-average molar mass M win the range of 10,000 to 200,000 g / mol, which can be determined by ultracentrifugation (see K. Schilling, Analytical Ultracentrifugation, Nanolytics GmbH, Dallgow, pages 1-15) or light scattering measurement according to DIN EN ISO 16014-5:2012-10. The polycarbonates to be used particularly preferably have a weight-average molar mass in the range of 12,000 to 80,000 g / mol, especially preferably a weight-average molar mass in the range of 20,000 to 35,000 g / mol.

[0085] The average molar mass of polycarbonates preferably used as polyesters according to the invention can preferably be adjusted in a known manner by an appropriate amount of chain terminators. The chain terminators can be used individually or as a mixture of different chain terminators.

[0086] Preferred chain terminators are both monophenols and monocarboxylic acids. Preferred monophenols are phenol, p-chlorophenol, p-tert-butylphenol, cumylphenol, or 2,4,6-tribromophenol, as well as long-chain alkylphenols, especially 4-(1,1,3,3-tetramethylbutyl)phenol or monoalkylphenols or dialkylphenols with a total of 8 to 20 carbon atoms in the alkyl substituents, especially 3,5-di-tert-butylphenol, p-tert-octylphenol, p-dodecylphenol, 2-(3,5-dimethylheptyl)phenol, or 4-(3,5-dimethylheptyl)phenol. Preferred monocarboxylic acids are benzoic acid, alkylbenzoic acids, or halobenzoic acids.

[0087] Particularly preferred chain terminators are phenol, p-tert-butylphenol, 4-(1,1,3,3-tetramethylbutyl)phenol or cumylphenol.

[0088] The amount of chain terminators to be used is preferably in the range of 0.25 to 10 mol%, based on the sum of the bisphenols used.

[0089] Polycarbonates preferably used as polyesters according to the invention can be branched in a known manner, preferably by incorporating trifunctional or more than trifunctional branching agents. Preferred branching agents are those with three or more than three phenolic groups or those with three or more than three carboxylic acid groups.

[0090] Besonders bevorzugte Verzweiger sind Phloroglucin, 4,6-Dimethyl-2,4,6-tri-(4-hydroxy- phenyl)-hepten-2, 4,6-Dimethyl-2,4,6-tri-(4-hydroxyphenyl)-heptan, 1 ,3,5-Tri-(4- hydroxyphenyl)-benzol, 1 ,1 ,1 -Tris-(4-hydroxyphenyl)-ethan, Tri-(4-hydroxyphenyl)- phenylmethan, 2,2-Bis-[4,4-bis-(4-hydroxyphenyl)-cyclohexyl]-propan, 2,4-Bis-(4- hydroxyphenyl-isopropyl)-phenol, 2,6-Bis-(2-hydroxy-5'-methyl-benzyl)-4-methylphenol, 2- (4-Hydroxyphenyl)-2-(2,4-dihydroxyphenyl)-propan, Hexa-(4-(4-hydroxyphenyl-isopropyl)- phenyl)-terephthalsäureester, Tetra-(4-hydroxyphenyl)-methan, Tetra-(4-(4- hydroxyphenyl-isopropyl)-phenoxy)-methan und 1 ,4-Bis-(4',4"-dihydroxytriphenyl)- methylbenzol, 2,4-Dihydroxybenzoesäure, Trimesinsäure, Cyanurchlorid, 3,3-Bis-(3- methyl-4-hydroxyphenyl)-2-oxo-2,3-dihydroindol, Trimesinsäuretrichlorid oder a,a‘,a ’-Tris- (4-hydroxyphenol)-1 ,3,5-triisopropylbenzol.

[0091] Very particularly preferred branching agents are 1,1,1-tris-(4-hydroxyphenyl)ethane or 3,3-bis-(3-methyl-4-hydroxyphenyl)-2-oxo-2,3-dihydroindole.

[0092] The amount of branching agent to be used is preferably in the range of 0.05 mol% to 2 mol%, based on the moles of bisphenols used.

[0093] In the case of polycarbonate production by the interfacial process, the branching agents are preferably initially introduced with the bisphenols and the chain terminators in an aqueous alkaline phase, or dissolved in an organic solvent and added together with the carbonic acid derivatives. In the case of the transesterification process, the branching agents are preferably added together with the dihydroxyaromatics or bisphenols.

[0094] Catalysts to be used with preference in the production of polycarbonates to be used according to the invention preferably as polyesters by the melt transesterification process are ammonium salts and phosphonium salts, as described, for example, in US-A 3 442 864, JP-A-14742 / 72, US-A 5 399 659 or DE-A 19 539 290.

[0095] In a preferred embodiment, copolycarbonates can also be used as polyesters. Copolycarbonates within the meaning of the invention are, in particular, polydiorganosiloxane-polycarbonate block copolymers whose weight-average molar mass M wpreferably in the range from 10,000 to 200,000 g / mol, particularly preferably in the range from 20,000 to 80,000 g / mol, determined by gel chromatography in accordance with DIN EN ISO 16014-5:2012-10 after prior calibration by light scattering measurement or ultracentrifugation. The content of aromatic carbonate structural units in the polydiorganosiloxane-polycarbonate block copolymers is preferably in the range from 75 to 97.5 wt.%, particularly preferably in the range from 85 to 97 wt.%. The content of polydiorganosiloxane structural units in the polydiorganosiloxane-polycarbonate block copolymers is preferably in the range from 25 to 2.5 wt.%, particularly preferably in the range from 15 to 3 wt.%. The polydiorganosiloxane-polycarbonate block copolymers can preferably be prepared starting from a,o-bishydroxyaryloxy-end-group-containing polydiorganosiloxanes with an average degree of polymerization P n in the range of 5 to 100, particularly preferably with an average degree of polymerization Pn in the range of 20 to 80.

[0096] Polycarbonates particularly preferred for use as polyesters are the homopolycarbonate based on bisphenol A, the homopolycarbonate based on 1,1-bis-(4-hydroxyphenyl)-3,3,5-trimethylcyclohexane, and the copolycarbonates based on the two monomers bisphenol A and 1,1-bis-(4-hydroxyphenyl)-3,3,5-trimethylcyclohexane (= bisphenol TMC). Polycarbonates preferred for use as polyesters according to the invention are available, for example, under the Makrolon® brand from Covestro AG, Leverkusen.

[0097] In one embodiment, conventional additives, in particular mold release agents, can be mixed into the polycarbonates used as polyesters in the melt or applied to the surface. Preferably, the polycarbonates used as polyesters already contain mold release agents prior to subsequent compounding with the other components. Compounding (from English: compound = "mixture") is understood by those skilled in the art to be a term from plastics technology that is synonymous with plastics processing and describes the refinement of plastics by adding additives (fillers, additives, etc.) to specifically optimize the property profiles. See: https: / / de.wikipedia.org / wiki / Compoundierung. Compounding is preferably carried out in extruders, particularly preferably in co-rotating twin-screw extruders, counter-rotating twin-screw extruders,

[0098] Planetary roller extruders or co-kneaders and includes the process operations of conveying, melting, dispersing, mixing, degassing and pressure build-up.

[0099] In a preferred embodiment, blends of polycarbonate and polyalkylene terephthalates, which are also offered by Covestro AG under the Makroblend® brand, can also be used as polyesters. These are preferably PC-PET blends, PC-PBT blends, or PC-PCT-G blends, where PC stands for polycarbonate, PET for polyethylene terephthalate, PBT for polybutylene terephthalate, and PCT for polycyclohexylenedimethylene terephthalate.

[0100] 1,3-Dihydro-5,6-bis(((2-hydroxy-1-naphthyl)methylene)amino-2H-benzimidazole-2-onato(2-)-N5,N6,O5,O6)nickel

[0101] According to the invention, the orange pigment used is 1,3-dihydro-5,6-bis(((2-hydroxy-1-naphthyl)methylene)amino-2H-benzimidazol-2-onato(2-)-N5,N6,O5,O6)nickel known from DE OS 2263235. 1,3-dihydro-5,6-bis(((2-hydroxy-1-naphthyl)methylene)amino-2H-benzimidazol-2-onato(2-)-N5,N6,O5,O6)nickel can be prepared either by one of the two processes in Example 2 of DE OS 2263235, or is available as Pigment Orange 68 [CAS No. 42844-43-9] from, among others, Sinoever International, Dalian, China. Sinoever International specifies the color location for the pigment Orange 68 or 1,3-dihydro-5,6-bis(((2-hydroxy-1-naphthyl)methylene)amino-2H-benzimidazol-2-onato(2-)-N5,N6,05,06)nickel [CAS No. 42844-93-9] with the Cartesian coordinates L*=53.5 a*= 58.2 and b*= 76.7.

[0102] 1,3-Dihydro-5,6-bis(((2-hydroxy-1-naphthyl)methylene)amino-2H-benzimidazol-2-onato(2-)- N5,N6,O5,O6)nickel can be used directly as a powder, or in the form of a masterbatch, in the form of a compact or in the form of a concentrate, with masterbatches being preferred and masterbatches in a polyester matrix being particularly preferred.

[0103] 1,3-Dihydro-5,6-bis(((2-hydroxy-1-naphthyl)methylene)amino-2H-benzimidazol-2-onato(2-)-N5,N6,O5,O6)nickel can be referred to as an adduct. An adduct in the sense of the present invention is a composite molecule in which the bond between metal - here nickel - and the rest of the molecule preferably occurs through intermolecular interactions, through Lewis acid-base interactions or through coordinate bonds. An adduct in the sense of the present invention should generally include all types of intercalation compounds and addition compounds. Intercalation compounds or addition compounds in the sense of the present invention are preferably compounds that are formed due to intermolecular interactions such as van der Waals interactions or Lewis acid-base interactions.The way in which the intercalation occurs depends both on the chemical properties of the component to be incorporated and on the chemical nature of the host lattice. Such compounds are often referred to as intercalation compounds. In the chemical sense, this refers to the incorporation of molecules, ions, and, rarely, atoms into chemical compounds.

[0104] Furthermore, the term "intercalation compound" or "addition compound" also includes inclusion compounds, so-called clathrates. These are compounds of two substances, one of which is a guest molecule embedded in a lattice or cage made of a host molecule.

[0105] The terms "intercalation compound" or "addition compound" within the meaning of the present invention also include intercalation solid solutions as well as interstitial compounds. These are chemical, non-stoichiometric, crystalline compounds composed of at least two elements.

[0106] Furthermore, the terms "intercalation compound" or "addition compound" within the meaning of the present invention also include compounds formed by coordinate bonds or complex bonds. Such compounds are sometimes also referred to as substitutional solid solutions or exchange solid solutions, in which at least two substances form a common crystal and the atoms of the second component sit on regular lattice sites of the first component.

[0107] Additional components

[0108] In a preferred embodiment, at least one filler or reinforcing material is used. Mixtures of two or more different fillers and / or reinforcing materials can also be used.

[0109] Preferably, at least one filler or reinforcing material from the group consisting of carbon fibers [CAS No. 7440-44-0], glass beads or solid or hollow glass beads, or glass fibers, or ground glass, amorphous quartz glass, aluminum borosilicate glass with an alkali content of 1% (E-glass) [CAS No. 65997-17-3], amorphous silica [CAS No. 7631-86-9], quartz powder [CAS No. 14808-60-7], calcium silicate [CAS No. 1344-95-2], calcium metasilicate [CAS No. 10101-39-0], magnesium carbonate [CAS No. 546-93-0], kaolin [CAS No. 1332-58-7], calcined kaolin [CAS No. 92704-41 -1], chalk [CAS No. 1317-65- 3], kyanite [CAS No. 1302-76-7], powdered or ground quartz [CAS No. 14808-60-7], mica [CAS No. 1318-94-1], phlogopite [CAS No. 12251 -00-2], barium sulfate [CAS No. 7727-43-7], feldspar [CAS No. 68476-25-5], wollastonite [CAS No. 13983-17-0], montmorillonite [CAS No. 67479-91 -8], pseudoboehmite of the formula AlO (OH), magnesium carbonate [CAS No. 12125-28-9] and talc [CAS No. 14807-96-6].

[0110] Among the fibrous fillers or reinforcing materials, glass fibers and wollastonite are particularly preferred, with glass fibers being even more preferred. With regard to glass fibers, according to "http: / / de.wikipedia.org / wiki / Faser-Kunststoff-Verbund" (http: / / de.wikipedia.org / wiki / Faser-Kunststoff-Verbund), the expert distinguishes between chopped fibers, also known as short fibers, with a length in the range of 0.1 to 1 mm, long fibers with a length in the range of 1 to 50 mm, and continuous fibers with a length L > 50 mm. Short fibers are preferably used in injection molding technology and can be processed directly with an extruder. Long fibers can also be processed in extruders. They are widely used in fiber injection molding. Long fibers are often added to thermosets as fillers. Continuous fibers are used as rovings or fabrics in fiber-reinforced plastics. Products with continuous fibers achieve the highest stiffness and strength values.Furthermore, milled glass fibers are offered, the length of which after milling is typically in the range of 70 to 200 pm.

[0111] Glass fibers preferably used as fillers or reinforcing materials according to the invention are chopped long glass fibers with an average initial length, determined by laser diffraction particle size analysis (laser granulometric measurement or laser diffractometry) according to ISO 13320, in the range of 1 to 50 mm, particularly preferably in the range of 1 to 10 mm, and very particularly preferably in the range of 2 to 7 mm. For information on laser diffraction particle size determination / laser diffractometry according to ISO 13320, see: https: / / de.wikipedia.org / wiki / Laserbeugungs-Partikelgr%C3%B6%C3%9Fenanalyse

[0112] Preferred glass fibers to be used as filler or reinforcing material have an average fiber diameter determined by laser diffractometry according to ISO 13320 in the range from 7 to 18 pm, particularly preferably in the range from 9 to 15 pm.

[0113] In a preferred embodiment, the glass fibers preferably used as fillers or reinforcing materials are treated with a suitable sizing system or adhesion promoter. A silane-based sizing system or adhesion promoter is preferably used.

[0114] Flame retardants

[0115] In a preferred embodiment, at least one flame retardant is used. Preferred flame retardants are mineral flame retardants, nitrogen-containing flame retardants, or phosphorus-containing flame retardants.

[0116] Among mineral flame retardants, magnesium hydroxide is particularly preferred. Magnesium hydroxide [CAS No. 1309-42-8] can be contaminated due to its origin and method of production. Typical impurities include silicon-, iron-, calcium-, and / or aluminum-containing species, which can be embedded, for example, in the form of oxides in the magnesium hydroxide crystals. The magnesium hydroxide used as a mineral flame retardant can be uncoated or coated. Preferably, the magnesium hydroxide used as a mineral flame retardant is coated with coatings based on stearates or aminosiloxanes, particularly preferably with aminosiloxanes.Magnesium hydroxide preferably used as a mineral flame retardant has an average particle size d50, determined by laser diffractometry according to ISO 13320, in the range from 0.5 pm to 6 pm, with a d50 in the range from 0.7 pm to 3.8 pm being preferred and a d50 in the range from 1.0 pm to 2.6 pm being particularly preferred.

[0117] Magnesium hydroxide types suitable for use as mineral flame retardants according to the invention include Magnifin® H5IV from Martinswerk GmbH, Bergheim, Germany, or Hidromag® Q2015 TC from Penoles, Mexico City, Mexico. Preferred nitrogen-containing flame retardants are the reaction products of trichlorotriazine, piperazine, and morpholine according to CAS No. 1078142-02-5, in particular MCA PPM Triazine HF from MCA Technologies GmbH, Biel-Benken, Switzerland, as well as melamine cyanurate and condensation products of melamine, in particular Meiern, Melam, Melon, and higher-condensed compounds of this type. Preferred inorganic nitrogen-containing compounds are ammonium salts.

[0118] Furthermore, salts of aliphatic and aromatic sulfonic acids and mineral flame retardant additives, in particular aluminum hydroxide or Ca-Mg carbonate hydrates (DE-A 4 236 122) can also be used.

[0119] In an alternative embodiment, zinc-containing compounds can also be used. These preferably include zinc oxide, zinc borate, zinc stannate, zinc hydroxystannate, zinc sulfide, and zinc nitride, or mixtures thereof.

[0120] Preferred phosphorus-containing flame retardants are organic metal phosphinates, aluminum salts of phosphonic acid, red phosphorus, inorganic metal hypophosphites, metal phosphonates, derivatives of 9,10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxides (DOPO derivatives), resorcinol bis(diphenyl phosphate) (RDP) including oligomers, bisphenol A bisdiphenyl phosphate (BDP) including oligomers, melamine pyrophosphate, melamine polyphosphate, melamine poly(aluminum phosphate), melamine poly(zinc phosphate) or phenoxyphosphazene oligomers and mixtures thereof.

[0121] A preferred organic metal phosphinate is aluminum tris(diethylphosphinate). A preferred inorganic metal hypophosphite is aluminum hypophosphite.

[0122] Other flame retardants to be used are carbon formers, particularly preferably phenol-formaldehyde resins, polycarbonates, polyimides, polysulfones, polyethersulfones or polyether ketones as well as anti-drip agents, in particular tetrafluoroethylene polymers.

[0123] Furthermore, halogen-containing flame retardants can be used. Preferred halogen-containing flame retardants are commercially available organic halogen compounds, particularly preferably ethylene-1,2-bistetrabromophthalimide, decabromodiphenylethane, tetrabromobisphenol A epoxy oligomer, tetrabromobisphenol A oligocarbonate,

[0124] Tetrachlorobisphenol A oligocarbonate, polypentabromobenzyl acrylate, brominated polystyrene, or brominated polyphenylene ethers, which can be used alone or in combination with synergists, especially antimony trioxide or antimony pentoxide, with brominated polystyrene being particularly preferred among the halogen-containing flame retardants. Brominated polystyrene is preferably used in amounts ranging from 10 to 30 wt. %, particularly preferably in amounts ranging from 15 to 25 wt. %, in each case based on the total composition, with at least one of the remaining components being reduced to such an extent that the sum of all weight percentages always amounts to 100.

[0125] Brominated polystyrene is commercially available in various product grades. Examples include Firemaster® PBS64 from Lanxess, Cologne, Germany, and Saytex® HP-3010 from Albemarle, Baton Rouge, USA.

[0126] Additive

[0127] In a preferred embodiment, an additive is used in addition to the polyester and 1,3-dihydro-5,6-bis(((2-hydroxy-1-naphthyl)methylene)amino-2H-benzimidazol-2-onato(2-)-N5,N6,05,06)nickel. Preferred additives are antioxidants, thermal stabilizers, UV stabilizers, gamma ray stabilizers, components to reduce water absorption or hydrolysis stabilizers, antistatic agents, emulsifiers, nucleating agents, plasticizers, processing aids, impact modifiers, lubricants and / or mold release agents, components to reduce water absorption, flow aids or elastomer modifiers, chain-extending additives, and colorants other than 1,3-dihydro-5,6-bis(((2-hydroxy-1-naphthyl)methylene)amino-2H-benzimidazol-2-onato(2-)-N5,N6,05,06)nickel. The additives can be used alone or in mixtures or in the form of masterbatches.

[0128] Preferred thermal stabilizers as additives are sterically hindered phenols, especially those containing at least one 2,6-di-tert-butylphenyl group and / or 2-tert-butyl-6-methylphenyl group, as well as phosphites, hypophosphites, especially sodium hypophosphite NaH2PO2, hydroquinones, aromatic secondary amines, substituted resorcinols, salicylates, benzotriazoles and benzophenones, 3,3'-thiodipropionic acid esters, and variously substituted representatives of these groups, or mixtures thereof. The thermal stabilizers to be used as additives are preferably used in amounts of 0.01 to 2 parts by mass, particularly preferably 0.05 to 1 part by mass, each based on 100 parts by mass of polyester.

[0129] UV stabilizers used as additives are preferably substituted resorcinols, salicylates, benzotriazoles, and benzophenones, HALS derivatives (“hindered amine light stabilizers”) containing at least one 2,2,6,6-tetramethyl-4-piperidyl unit, or benzophenones. The UV stabilizers used as additives are preferably used in amounts of 0.01 to 2 parts by mass, particularly preferably 0.1 to 1 part by mass, each based on 100 parts by mass of polyester. Colorants to be used as additives and different from 1,3-dihydro-5,6-bis(((2-hydroxy-1-naphthyl)methylene)amino-2H-benzimidazol-2-onato(2-)-N5,N6,05,06)nickel are preferred, inorganic pigments, in particular ultramarine blue, bismuth vanadate, iron oxide, titanium dioxide, zinc sulfide, cerium sulfides, tin-titanium-zinc oxides [CAS No. 923954-49-8], furthermore organic colorants, preferably phthalocyanines, quinacridones, benzimidazoles, in particular pyrimidine-azo-benzimidazole [CAS No.72102-84-2] and / or Pigment Yellow 192 [CAS No. 56279-27-7], as well as perylenes, anthraquinones, especially Cl Solvent Yellow 163 [CAS No. 13676-91-0], and perylenes, especially 10,10'-oxy-bis-12H-phthaloperin-12-one [CAS No. 203576-97-0], are used, although this list is not exhaustive. In one embodiment, carbon black or nigrosine are also used as colorants.

[0130] Nucleating agents to be used as additives are preferably sodium or calcium phenylphosphinate, aluminum oxide or silicon dioxide and, most preferably, talc, although this list is not exhaustive.

[0131] Preferred plasticizers to be used as additives are dioctyl phthalate, dibenzyl phthalate, butylbenzyl phthalate, hydrocarbon oils or N-(n-butyl)benzenesulfonamide.

[0132] Elastomer modifiers preferably used as additives include one or more graft polymers of

[0133] E.1 5 to 95% by weight, preferably 30 to 90% by weight, of at least one vinyl monomer and

[0134] E.2 95 to 5 wt.%, preferably 70 to 10 wt.% of one or more

[0135] Graft bases with glass transition temperatures <10°C, preferably <0°C, particularly preferably <-20°C, where the weight percentages are based on 100% by weight of elastomer modifier. The graft base E.2 generally has an average particle size (d50 value), determined by laser diffraction according to ISO 13320, of 0.05 to 10 pm, preferably 0.1 to 5 pm, particularly preferably 0.2 to 1 pm.

[0136] Monomers for E.1 are preferably mixtures of

[0137] E.1.1 50 to 99 wt.% vinylaromatics and / or nucleus-substituted vinylaromatics, in particular styrene, a-methylstyrene, p-methylstyrene, p-chlorostyrene, and / or methacrylic acid (Ci-C8) alkyl esters, in particular. Methyl methacrylate, ethyl methacrylate) and E.1 .2 1 to 50 wt.% vinyl cyanides, in particular unsaturated nitriles such as acrylonitrile and methacrylonitrile, and / or (meth)acrylic acid (Ci-C8) alkyl esters, in particular methyl methacrylate, glycidyl methacrylate, n-butyl acrylate, t-butyl acrylate, and / or derivatives, in particular anhydrides and imides of unsaturated carboxylic acids, in particular maleic anhydride or N-phenyl maleimide, wherein the weight percentages relate to 100 wt.% elastomer modifier.

[0138] Preferred monomers E.1.1 are selected from at least one of the monomers styrene, α-methylstyrene, and methyl methacrylate. Preferred monomers E.1.2 are selected from at least one of the monomers acrylonitrile, maleic anhydride, glycidyl methacrylate, and methyl methacrylate. Particularly preferred monomers E.1.1 are styrene and E.1.2 are acrylonitrile.

[0139] Suitable graft bases E.2 for the graft polymers used in the elastomer modifiers include diene rubbers, EPDM rubbers (i.e., those based on ethylene / propylene and optionally diene), as well as acrylate, polyurethane, silicone, chloroprene, and ethylene / vinyl acetate rubbers. EPDM stands for ethylene-propylene-diene rubber.

[0140] Preferred grafting bases E.2 are diene rubbers, in particular based on butadiene, isoprene, etc., or mixtures of diene rubbers or copolymers of diene rubbers or mixtures thereof with further copolymerizable monomers, in particular according to E.1.1 and E.1.2, with the proviso that the glass transition temperature of component E.2 is <10°C, preferably <0°C, particularly preferably <-10°C.

[0141] Lubricants and / or mold release agents to be used as additives are preferably long-chain fatty acids, especially stearic acid or behenic acid, their salts, especially Ca or Zn stearate, and their ester derivatives, especially those based on pentaerythritol, especially fatty acid esters of pentaerythritol or amide derivatives, especially ethylenebisstearylamide, montan waxes, and low-molecular-weight polyethylene or polypropylene waxes. Montan waxes within the meaning of the present invention are mixtures of straight-chain, saturated carboxylic acids with chain lengths of 28 to 32 carbon atoms.

[0142] Proceedings

[0143] The invention also relates to a process for producing tracking-resistant electromobility components with a color difference AE <20 from the L*a*b* coordinates to a color number beginning with "2" in the RAL color table and a CTI to be determined according to IEC 60112 in the range from 425 to 600 volts with a maximum deviation of the CTI of 2.5% to a component of the same composition without colorant, by mixing at least one polyester and 1,3-dihydro-5,6-bis(((2-hydroxy-1-naphthyl)methylene)amino-2H-benzimidazol-2-onato(2-)-N5,N6,05,06)nickel to form polymer compositions, discharging them into strands, cooling them until they are granulatable, drying them and granulating them, and then injection molding the polymer compositions, including the special processes gas injection technology (GIT), water injection technology (WIT) or projectile injection technology (PIT), in extrusion processes, including profile extrusion, or by blow molding, whereby

[0144] A) per 100 parts by mass of at least one polyester,

[0145] B) 0.01 to 3 parts by mass, preferably 0.01 to 2.5 parts by mass, of 1,3-dihydro-5,6-bis(((2-hydroxy-1-naphthyl)methylene)amino-2H-benzimidazol-2-onato(2-)- N5,N6,O5,O6)nickel are used.

[0146] Preferably, for the method according to the invention, the electromobility components also have a color distance AE <10 from the L*a*b* coordinates to a color number beginning with "2" in the RAL color table, particularly preferably AE <5.

[0147] Polycarbonate or C2-C polyalkylene terephthalate, in particular polybutylene terephthalate, are preferably used as polyesters.

[0148] For the sake of clarification, it should be noted that the scope of the present invention encompasses all definitions and parameters listed in general or preferred areas in the context of the electromobility components in any combination of the methods according to the invention.

[0149] Examples

[0150] To demonstrate the property improvements described in the invention, corresponding polyester-based polymer compositions were first prepared by compounding. The individual components were mixed in a twin-screw extruder (Leistritz LSM 30-34 from Leistritz AG (Nuremberg, Germany)) at temperatures between 270 and 300°C, extruded as a strand, cooled to pelletizable condition, and pelletized. After drying (typically two days at 80°C in a vacuum drying cabinet), the pellets were processed by injection molding at temperatures between 270 and 290°C to produce standard test specimens for the respective tests.

[0151] In the context of the present invention, the tracking resistance of the molding compounds described in Table I in the form of 60*40*2 mm was used as a measure 3 -Plates to determine the CTI value (Comparative Tracking Index) in volts according to IEC 60112.

[0152] Educts:

[0153] Component A) Polybutylene terephthalate (Pocan® B1505, Lanxess Deutschland GmbH, Cologne, Germany)

[0154] Component B): 1,3-Dihydro-5,6-bis(((2-hydroxy-1-naphthyl)methylene)amino-2H-benzimidazol-2-onato(2-)-N5,N6,05,06)nickel [CAS No. 42844-93-9], Lanxess Deutschland GmbH, Cologne, Germany)

[0155] Table I

[0156] The results in Table I show no negative impairment of the tracking resistance determined according to IEC 601 12 in Example 1 according to the invention, compared to the non-colored material in Comp. 1. The plastic sheets tested in Example 1 according to the invention had a RAL color value of 2001 with an AE of <10.

[0157] The tracking resistance of the samples tested in the present application was determined in accordance with IEC 60112 “Method for determining the

[0158] Test number and the comparative number of the tracking distance of solid, insulating materials" using small plates with the dimensions 60 mm • 60 mm • 2 mm, by adding a total of 50 drops of standardized electrolyte solution at intervals of 30 seconds and measuring the current on the surface between two platinum electrodes until a tracking current of > 0.5 A was reached.

Claims

1 . Tracking-resistant electromobility components with a color difference AE <20 from the L*a*b* coordinates to a color number beginning with "2" in the RAL color table based on at least one polyester and 1,3-dihydro-5,6-bis(((2-hydroxy-1-naphthyl)methylene)amino-2H-benzimidazol-2-onato(2-)- N5,N6,O5,O6)nickel, characterized in that they have a CTI to be determined according to IEC 60112 in the range of 425 to 600 volts with a maximum deviation of the CTI of 2.5% compared to a component of the same composition without colorant and with the proviso that 0.01 to 3 parts by mass of 1,3-dihydro-5,6-bis(((2-hydroxy-1 - naphthyl)methylene)amino-2H-benzimidazol-2-onato(2-)-N5,N6,05,06)nickel can be used.

2. Tracking current-resistant electromobility components according to claim 1, characterized in that polyester stands for C2-C polyalkylene terephthalate or for polycarbonate, preferably for polybutylene terephthalate.

3. Tracking current-resistant electromobility components according to claim 1 or 2, characterized in that 0.01 to 2.5 parts by mass of 1,3-dihydro-5,6-bis(((2-hydroxy-1-naphthyl)methylene)amino-2H-benzimidazol-2-onato(2-)-N5,N6,05,06)nickel are present per 100 parts by mass of polyester.

4. Tracking-current-resistant electromobility components according to one or more of claims 1 to 3, characterized in that they are components which are either in direct contact with live parts or which, in the direct vicinity or spatial proximity thereto, have the function of contact protection, a warning marking or a shield, preferably components which are in direct contact with the live parts.

5. Tracking current-resistant electromobility components according to one or more of claims 1 to 4, characterized in that in the case of battery components, they are standard and round cell modules, cell housings, cell connectors, cell contact systems, module connectors, pressure equalization elements, seals and intelligent battery management systems, in the case of proton exchange membrane fuel cells, they are modules or stack modules, metallic bipolar plates, end and media modules and sealing systems, in the case of electric drive units, they are seals and functionally integrated Housing covers, housing seals, shaft seals, plate carriers as well as stamping packages, shielding systems or dynamic precision parts.

6. Use of 1,3-dihydro-5,6-bis(((2-hydroxy-1-naphthyl)methylene)amino-2H-benzimidazol-2-onato(2-)-N5,N6,05,06)nickel for obtaining tracking-resistant polyester-based electromobility components with a color difference AE <20, preferably AE <10, in particular AE <5, from the L*a*b* coordinates to a color number beginning with "2" in the RAL color table, characterized in that the tracking resistance is determined by a CTI to be determined according to IEC 60112 in the range of 425 to 600 volts with a maximum deviation of the CTI of 2.5% compared to a component of the same composition without colorant and with the proviso that 0.01 to 3 parts by mass of at least one polyester ,3-Dihydro-5,6-bis(((2-hydroxy-1 -naphthyl)methylene)amino-2H- benzimidazol-2-onato(2-)-N5,N6,05,06)nickel can be used.

7. Use according to claim 6, characterized in that polyester is C2-Cw-polyalkylene terephthalate or polycarbonate, preferably polybutylene terephthalate.

8. Use according to one of claims 6 or 7, characterized in that 0.01 to 2.5 parts by mass of 1,3-dihydro-5,6-bis(((2-hydroxy-1-naphthyl)methylene)amino-2H-benzimidazol-2-onato(2-)-N5,N6,05,06)nickel are present per 100 parts by mass of at least one polyester.

9. Use according to one or more of claims 6 to 8, characterized in that the electromobility components are components which are either in direct contact with live parts or which, in the direct vicinity or spatial proximity thereto, have the function of contact protection, a warning marking or a shield, preferably components which are in direct contact with the live parts.

10. Use according to one or more of claims 6 to 9, characterized in that the electromobility components in the case of battery components are standard and round cell modules, cell housings, cell connectors, cell contact systems, module connectors, pressure equalization elements, seals and intelligent battery management systems, in the case of proton exchange membrane fuel cells are modules or stack modules, metallic bipolar plates, end and media modules and sealing systems, in the case of electric drive units are seals and functionally integrated Housing covers, housing seals, shaft seals, plate carriers as well as stamping packages, shielding systems or dynamic precision parts. 1 1 . Process for the production of tracking-resistant electromobility components with a color difference AE <20 from the L*a*b* coordinates to a color number beginning with "2" in the RAL color table and a CTI to be determined according to IEC 60112 in the range from 425 to 600 volts with a maximum deviation of the CTI of 2.5% to a component of the same composition without colorant, characterized in that at least one polyester and 1,3-dihydro-5,6-bis(((2-hydroxy-1-naphthyl)methylene)amino-2H-benzimidazol-2-onato(2-)-N5,N6,05,06)nickel are mixed to form polymer compositions, extruded to form strands, cooled to granularity, dried and granulated, and the polymer compositions are then processed by injection molding, including the special processes gas injection technology, water injection technology or projectile injection technology, in extrusion processes, including in profile extrusion or by blow molding, whereby A) per 100 parts by mass of at least one polyester, B) 0.01 to 3 mass fractions of 1,3-dihydro-5,6-bis(((2-hydroxy-1-naphthyl)methylene)amino-2H-benzimidazol-2-onato(2-)- N5,N6,O5,O6)nickel are used.

12. Process according to claim 11, characterized in that polycarbonate or C2-C4 polyalkylene terephthalate, in particular polybutylene terephthalate, is used as polyester.

13. A process according to claim 11 or 12, characterized in that 0.01 to 2.5 parts by mass of 1,3-dihydro-5,6-bis(((2-hydroxy-1-naphthyl)methylene)amino-2H-benzimidazol-2-onato(2-)-N5,N6,05,06)nickel are used per 100 parts by mass of at least one polyester.

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