Electromobility components

Abstract

The present invention relates to tracking current-resistant electromobility components having a colour difference ΔE <20 from the L*a*b* coordinates for a colour number in the RAL colour chart that begins with "2", comprising polymer compositions based on at least one polyamide and 1,3-dihydro-5,6-bis(((2-hydroxy-1-naphthyl)methylene)amino-2H-benzimidazol-2-onato(2-)-N5,N6,O5,O6)nickel, and to the use of 1,3-dihydro-5,6-bis(((2-hydroxy-1-naphthyl)methylene)amino-2H-benzimidazol-2-onato(2-)-N5,N6,O5,O6)nickel for production of polyamide-based tracking current-resistant electromobility components having a colour difference ΔE <20 from the L*a*b* coordinates for a colour number in the RAL colour chart that begins 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 polyamide 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 polyamide-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 polyamides 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; 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 > 600 V; insulating material group II = 400 V < CTI < 600 V; Insulating material group Illa = 175V < CTI < 400V; Insulating material group II lb = 100V < CTI < 175V.

[0007] The CTI value to be determined for tracking resistance within the scope of this invention indicates the voltage up to which the base material exhibits 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 A. Details of the CTI measurement method are specified in IEC 60112.

[0008] 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.

[0009] 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 polyamides. 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.

[0010] EP 3 792 302 A1 describes polyamide compositions for high-voltage components in electromobility that can correspond to the color numbers RAL2003, RAL2004, RAL2007, RAL2008, RAL2010, or RAL2011. Polyamide 6, polyamide 66, and / or polyamide 46 are disclosed as polyamides. Ni-2-hydroxynaphthylbenzimidazole, among others, is proposed as an additional colorant for component E, to be used in combination with Solvent Orange 111. The objective of EP 3792302 A1 was to maintain low tracking resistance while simultaneously enabling laser marking of high-voltage components.

[0011] EP 3 868 817 A1 discloses polymer compositions and products to be produced therefrom, preferably high-voltage components, particularly preferably high-voltage components for electromobility, comprising A) 100 parts by mass of polyamide, and B) 0.01 to 5 parts by mass, particularly preferably 0.01 to 3 parts by mass, of at least one pigment system based on inorganic mixed oxides containing titanium dioxide, tin oxide, and zinc oxide, with the proviso of an AE<30 to the L*a*b* coordinates of a color number beginning with "2" in the RAL color table. The object of EP 3 868 817 A1 was to achieve improved laser inscribability compared to the prior art, improved lightfastness, and improved thermal stability by maintaining the original color achieved immediately after injection molding under UV light or under thermal stress, respectively, for a longer period of time than compared to 12H-phthaloperin-12-one.

[0012] CN 112940500 B describes fuses made of polyamide with flame retardants and a colorant. Pigment Orange 68 is also mentioned as the colorant.

[0013] CN 109 762 162 A describes in Example 5 the polymerization of caprolactam in the presence of Pigment Orange 68, which achieves a good distribution of the additives in the masterbatches.

[0014] However, based on the teaching of EP 3 947 020 B1, the object of the present invention was to provide tracking-resistant electromobility components based on polyamides 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 polyamides 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, as 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 shows 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,N6,05,06)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 beginning with "2" in the RAL color table based on at least one polyamide 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 525 to 600 volts and a maximum deviation of the CTI of 2.5% compared to a component of the same composition without colorant.

[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 5 parts by mass, particularly preferably 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 are present per 100 parts by mass of polyamide.

[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 tracking-resistant polyamide-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 tracking resistance is determined by a CTI to be determined according to IEC 60112 in the range from 525 to 600 volts with a maximum deviation of the CTI of 2.5% compared to a component of the same composition without colorant. Preferably, 1,3-dihydro-5,6-bis(((2-hydroxy-1-naphthyl)methylene)amino-2H-benzimidazol-2-onato(2-)- N5,N6,O5,O6)nickel is used in combination with titanium dioxide.

[0021] In the use according to the invention, 0.01 to 5 parts by mass, particularly preferably 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,O5,O6)nickel are preferably present per 100 parts by mass of polyamide.

[0022] Particularly preferably, in the use according to the invention, 0.01 to 5 parts by mass, particularly preferably 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 and 1 to 150 parts by mass, particularly preferably 5 to 80 parts by mass, very particularly preferably 10 to 50 parts by mass, of titanium dioxide are present per 100 parts by mass of at least one polyamide.

[0023] 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 polyamide 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.

[0024] 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.

[0025] 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 tones 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 tones that correspond to the color number RAL2003, RAL2008, RAL 2010 and RAL2011 in the RAL color system being very particularly preferred.

[0026] 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.

[0027] Orange

[0028] For the purposes of the present invention, orange is defined as a color that has a color number beginning with "2" in the RAL color table according to https: / / de.wikipedia.org / wiki / RAL-Farbe#Orange. Specifically, as of the filing date of the present invention, orange shades are distinguished according to Table 1:

[0029] Table 1

[0030] L* a* b*

[0031] RAL 2000 yellow orange 58.20 37.30 68.68

[0032] RAL 2001 red-orange 49.41 39.79 35.29

[0033] RAL 2002 blood orange 47.74 47.87 33.73

[0034] RAL 2003 pastel orange 66.02 41.22 52.36

[0035] RAL 2004 pure orange 56.89 50.34 49.81

[0036] RAL 2005 Bright Orange 72.27 87.78 82.31

[0037] RAL 2007 Bright Orange 76.86 47.87 97.63

[0038] RAL 2008 light red orange 60.33 46.91 60.52

[0039] RAL 2009 Traffic Orange 55.83 47.79 48.83

[0040] RAL 2010 Signalorange 55,39 40,10 42,42

[0041] RAL 2011 Tieforange 59,24 40,86 64,50

[0042] RAL 2012 Lachsorange 57,75 40,28 30,66

[0043] RAL 2013 Perlorange 40,73 32,14 34,92

[0044] 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).

[0045] 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.

[0046] Further preferred embodiments of the invention

[0047] 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 polyamide 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 at least one polyamide. A filler particularly preferred according to the invention is titanium dioxide.

[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 polyamide 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 at least one polyamide.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 polyamide 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 0.01 to 80 parts by mass, particularly preferably 0.05 to 50 parts by mass, very particularly preferably 0.1 to 30 parts by mass, in each case based on 100 parts by mass of polyamide.

[0049] Polyamide

[0050] Polyamides to be used according to the invention can be produced by various processes and synthesized from different building blocks. A variety of processes have become known for the production of polyamides. Depending on the desired end product, different monomer building blocks, different chain regulators to achieve a desired molecular weight, or even monomers with reactive groups for subsequent post-treatment can be used.

[0051] The technically relevant processes for producing polyamides usually involve melt polycondensation. In this context, the hydrolytic polymerization of lactams is also considered a polycondensation.

[0052] Suitable starting materials include aliphatic and / or aromatic dicarboxylic acids such as adipic acid, 2,2,4- and 2,4,4-trimethyladipic acid, azelaic acid, sebacic acid, isophthalic acid, terephthalic acid; aliphatic and / or aromatic diamines such as tetramethylenediamine, hexamethylenediamine, 1,9-nonanediamine, 2,2,4- and 2,4,4-trimethylhexamethylenediamine; the isomeric diaminodicyclohexylmethanes, diaminodicyclohexylpropanes, bisaminomethylcyclohexane, phenylenediamines, xylylenediamines; aminocarboxylic acids such as aminocaproic acid; and the corresponding lactams. Particular preference is given to using caprolactams, in particular ε-caprolactam. Copolyamides composed of several of the above-mentioned monomers are included.

[0053] Preferred polyamides are semi-crystalline polyamides which can be produced from diamines and dicarboxylic acids and / or lactams with at least 5 ring members or corresponding amino acids.

[0054] Particularly preferred polyamides are polyamide 6, polyamide 66, polyamide 46, and / or partially aromatic copolyamides. Preferred partially aromatic copolyamides are PA6T / 6, PA6T / 66, PA6T / 6I, or PA6T / 6I / 66. Polyamides that are particularly preferred according to the invention are polyamide 6 (PA6) [CAS No. 25038-54-4] and polyamide 66 (PA66) [CAS No. 25038-54-4], with polyamide 6 being particularly preferred.

[0055] The designation of the polyamides used in this application complies with the international standard ISO 1874-1, where the first digit(s) indicate the number of carbon atoms of the starting diamine and the last digit(s) indicate the number of carbon atoms of the dicarboxylic acid. If only one number is given, as in the case of PA6, this means that the starting material is an α,ω-aminocarboxylic acid or the lactam derived from it, in the case of PA6, ε-caprolactam.

[0056] The PA6 [CAS No. 25038-54-4] preferably used according to the invention has a viscosity number, determined according to ISO 307 in a 0.5 wt. % solution in 96 wt. % sulfuric acid at 25 °C, in the range of 80 to 180 ml / g, particularly preferably in the range of 85 to 160 ml / g, and most preferably in the range of 90 to 140 ml / g. Polyamide 6 to be used according to the invention is available, for example, as Durethan® B26 from Lanxess Deutschland GmbH, Cologne.

[0057] The polyamide 66 [CAS No. 32131-17-2] preferably used according to the invention preferably has a viscosity number, determined according to ISO 307 in a 0.5 wt. % solution in 96 wt. % sulfuric acid at 25°C, in the range of 80 to 180 ml / g, very particularly preferably a viscosity number in the range of 85 to 160 ml / g, especially preferably in the range of 90 to 140 ml / g. Polyamide 66 to be used according to the invention is available, for example, as Ultramid® A24E01 from BASF SE, Ludwigshafen.

[0058] The polyamide to be used according to the invention can also be used in a mixture with at least one other polyamide and / or at least one other polymer. Preferred other polymers are selected from the group consisting of polyethylene, polypropylene, and acrylonitrile-butadiene-styrene copolymer (ABS). If at least one other polyamide or at least one other polymer is used, this is preferably or optionally done with the use of at least one compatibilizer.

[0059] Conventional additives, preferably mold release agents, stabilizers and / or flow aids known to the person skilled in the art, can be added to the polyamide to be used according to the invention in the melt.

[0060] Particularly preferred polyamide 6 in the context of the present invention is Durethan® B30S, Lanxess Deutschland GmbH, Cologne, Germany. 1,3-Dihydro-5,6-bis(((2-hydroxy-1-naphthyl)methylene)amino-2H-benzimidazol-2-onato(2-)-N5,N6,O5,O6)nickel

[0061] 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.

[0062] 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 polyamide matrix being particularly preferred.

[0063] 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.

[0064] Furthermore, the term "intercalation compound" or "addition compound" also refers to inclusion compounds, so-called clathrates. These are compounds of two substances, one of which is a guest molecule embedded in a lattice or cage composed of a host molecule. The terms "intercalation compound" or "addition compound" in the context of the present invention also include inclusion solid solutions and interstitial compounds. These are chemical, non-stoichiometric, crystalline compounds composed of at least two elements.

[0065] 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.

[0066] Additional components

[0067] 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.

[0068] 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], titanium dioxide [CAS No. 13463-67-7] and talc [CAS No.14807-96-6] is used.

[0069] Pigment Orange 68 is preferably used in combination with titanium dioxide. Preferably, 1 to 150 parts by mass of titanium dioxide are used per 100 parts by mass of polyamide, particularly preferably 5 to 80 parts by mass, and most preferably 10 to 50 parts by mass.

[0070] Titanium dioxide 13463-67-7 (TiO2) to be used according to the invention, with which the effects of the invention are particularly apparent, includes its crystal forms with CAS No. 1317-70-0 (anatase), with CAS No. 12188-41-9 (brookite) or CAS No. 1317-80-2 (rutile).

[0071] 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.

[0072] 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

[0073] 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.

[0074] 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.

[0075] Flame retardants

[0076] 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. Among the 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, for example, 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. The magnesium hydroxide used as a mineral flame retardant is preferably 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.

[0077] Magnesium hydroxide types suitable as mineral flame retardants according to the invention are, for example, Magnifin® H5IV from Martinswerk GmbH, Bergheim, Germany or Hidromag® Q2015 TC from Penoles, Mexico City, Mexico.

[0078] 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.

[0079] 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.

[0080] 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.

[0081] 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. A preferred organic metal phosphinate is aluminum tris(diethylphosphinate). A preferred inorganic metal hypophosphite is aluminum hypophosphite.

[0082] 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.

[0083] 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,

[0084] 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.

[0085] 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.

[0086] Additive

[0087] In a preferred embodiment, at least one additive is used in addition to the polyamide 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.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 polyamide.

[0088] 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, based in each case on 100 parts by mass of polyamide.

[0089] 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.

[0090] 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.

[0091] Preferred plasticizers to be used as additives are dioctyl phthalate, dibenzyl phthalate, butylbenzyl phthalate, hydrocarbon oils or N-(n-butyl)benzenesulfonamide.

[0092] Elastomer modifiers preferably used as additives comprise, inter alia, one or more graft polymers of E.1 5 to 95 wt.%, preferably 30 to 90 wt.%, of at least one vinyl monomer and

[0093] E.2 95 to 5 wt.%, preferably 70 to 10 wt.% of one or more

[0094] 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.

[0095] Monomers for E.1 are preferably mixtures of

[0096] 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

[0097] 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, the weight percentages being based on 100 wt.% elastomer modifier.

[0098] 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.

[0099] 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.

[0100] 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.

[0101] 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.

[0102] Proceedings

[0103] The invention also relates to a method for producing 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 and a CTI to be determined according to IEC 60112 in the range from 525 to 600 volts with a maximum deviation of the CTI of 2.5% to a component of the same composition without colorant, by combining at least one polyamide and 1,3-dihydro-5,6-bis(((2-hydroxy-1-naphthyl)methylene)amino-2H-benzimidazol-2-onato(2-)-N5,N6,05,06)nickel to

[0104] Mixing polymer compositions, forming strands, cooling them until they are granulatable, drying them and granulating them, and then further processing the polymer compositions by injection moulding, including the special processes gas injection technology (GIT), water injection technology (WIT) or projectile injection technology (PIT), by extrusion processes, including profile extrusion, or by blow moulding, whereby

[0105] A) per 100 parts by mass of at least one polyamide,

[0106] B) 0.01 to 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.

[0107] 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.

[0108] Preferably, polyamide 6 or polyamide 66 are used, in particular polyamide 6. The invention particularly preferably 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 525 to 600 volts with a maximum deviation of the CTI of 2.5% to a component of the same composition without colorant, by combining at least one polyamide and 1,3-dihydro-5,6-bis(((2-hydroxy-1-naphthyl)methylene)amino-2H-benzimidazol-2-onato(2-)-N5,N6,05,06)nickel to

[0109] Mixing polymer compositions, forming strands, cooling them until they are granulatable, drying them and granulating them, and then further processing the polymer compositions by injection moulding, including the special processes gas injection technology (GIT), water injection technology (WIT) or projectile injection technology (PIT), by extrusion processes, including profile extrusion, or by blow moulding, whereby

[0110] A) per 100 parts by mass of at least one polyamide,

[0111] B) 0.01 to 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 and

[0112] C) 1 to 150 parts by mass, particularly preferably 5 to 80 parts by mass, very particularly preferably 10 to 50 parts by mass, of titanium dioxide are used.

[0113] 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.

[0114] Examples

[0115] To demonstrate the property improvements described in the invention, corresponding polyamide-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 until pelletizable, 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.

[0116] 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.

[0117] Educts:

[0118] Component A) Polyamide 6 (Durethan® B30S, Lanxess Deutschland GmbH, Cologne,

[0119] Germany)

[0120] 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)

[0121] Component C): Neolor Light Orange H (Pigment Orange 78, CAS No. 12014-93-6, ColorChem International Corp., Atlanta, USA)

[0122] Component D): Titanium dioxide (R-FK-3, Tronox, Stamford, USA)

[0123] Table I

[0124] The results in Table 1 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 . If one assumes that EP 3 868 817 A1 is the closest prior art with regard to the tracking resistance, Example 2 according to the invention shows, in comparison with Comp. 2 (in which Pigment Orange 78 was used), that with 1,3-dihydro-5,6-bis(((2-hydroxy-1-naphthyl)methylene)amino-2H-benzimidazol-2-onato(2-)- N5,N6,O5,O6)nickel, the tracking resistance was surprisingly increased by 5%! The plastic sheets examined in Examples 1 and 2 according to the invention had a RAL color value of 2001 with an AE of <10.

[0125] The tracking resistance of the samples examined in the context of the present application was measured in accordance with IEC 60112 "Method for determining the proof and comparative tracking index of solid insulating materials" using plates measuring 60 mm • 60 mm • 2 mm by dripping 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

Patent claims 1 . Tracking current-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 polyamide and 1,3-dihydro-5,6-bis(((2-hydroxy-1-naphthyl)methylene)amino-2H-benzimidazol-2-onato(2-)-N5,N6,05,06)nickel, characterized in that they have a CTI to be determined according to IEC 60112 in the range of 525 to 600 volts with a maximum deviation of the CTI of 2.5% compared to a component of the same composition without colorant.

2. Tracking current-resistant electromobility components according to claim 1, characterized in that polyamide stands for polyamide 6 or polyamide 66.

3. Tracking current-resistant electromobility components according to one of claims 1 or 2, characterized in that 0.01 to 5 parts by mass, preferably 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 are present per 100 parts by mass of polyamide.

4. Tracking-resistant electromobility components according to one or more of claims 1 to 3, characterized in that 1,3-dihydro-5,6-bis(((2-hydroxy-1-naphthyl)methylene)amino-2H-benzimidazol-2-onato(2-)-N5,N6,05,06)nickel is used in combination with titanium dioxide, preferably 1 to 150 parts by mass, particularly preferably 5 to 80 parts by mass, very particularly preferably 10 to 50 parts by mass, of titanium dioxide to 100 parts by mass of at least one polyamide.

5. Tracking-current-resistant electromobility components according to one or more of claims 1 to 4, 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 compensation 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 include seals and functionally integrated housing covers, housing seals, shaft seals, disk 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 polyamide-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 from 525 to 600 volts with a maximum deviation of the CTI of 2.5% compared to a component of the same composition without colorant. 7 Use according to claim 6, characterized in that polyamide stands for polyamide 6 or for polyamide 66.

8. Use according to one of claims 6 or 7, characterized in that 0.01 to 5 parts by mass, particularly preferably 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 are present per 100 parts by mass of at least one polyamide.

9. Use according to one or more of claims 6 to 8, characterized in that 1,3-dihydro-5,6-bis(((2-hydroxy-1-naphthyl)methylene)amino-2H-benzimidazol-2-onato(2-)-N5,N6,05,06)nickel is used in combination with titanium dioxide.

10. Use according to claim 9, characterized in that 1 to 150 parts by mass, particularly preferably 5 to 80 parts by mass, very particularly preferably 10 to 50 parts by mass, of titanium dioxide are used per 100 parts by mass of at least one polyamide. 1 1. Use according to one or more of claims 6 to 10, 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.

12. Use according to one or more of claims 6 to 11, 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 sealing rings, plate carriers and stamping packages, shielding systems or dynamic precision parts.

13. A 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 525 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 polyamide 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 into strands, cooled to granulatability, dried and granulated, and the polymer compositions are then injection molded, including the special processes gas injection technology, water injection technology or projectile injection technology, into Extrusion processes, including profile extrusion, or blow molding, whereby A) per 100 parts by mass of at least one polyamide, B) 0.01 to 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.

14. The method according to claim 13, characterized in that 1,3-dihydro-5,6-bis(((2-hydroxy-1-naphthyl)methylene)amino-2H-benzimidazol-2-onato(2-)-N5,N6,O5,O6)nickel is used in combination with titanium dioxide, preferably 1 to 150 parts by mass, particularly preferably 5 to 80 parts by mass, very particularly preferably 10 to 50 parts by mass of titanium dioxide per 100 parts by mass of at least one polyamide.

15. Process according to claim 13 or 14, characterized in that polyamide is polyamide 6 or polyamide 66.

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