Molding compound and molded part made from high-molecular-weight and low-molecular-weight polyoxymethylene

Abstract

The present invention relates to a molding compound. In order to provide, in a simple manner, components subject to tribological stress, for example for gear applications and / or sliding applications, with improved properties, the molding compound comprises at least one high-molecular-weight polyoxymethylene having an average molecular weight greater than or equal to 350,000 g / mol and at least one low-molecular-weight polyoxymethylene having an average molecular weight in a range of less than or equal to 150,000 g / mol. Furthermore, the invention relates to a molded part and / or component formed at least partially from the molding compound, as well as to a device equipped therewith.

Description

[0001] R. 416435

[0002] - 1 -

[0003] Description

[0004] title

[0005] Molding compound and molded part made of high molecular weight and low molecular weight

[0006] The present invention relates to a molding compound and a molded part and / or component formed at least partially from the molding compound, as well as a device equipped therewith.

[0007] State of the art

[0008] Gears, like bearings, transmissions, guides, motors, and other machine elements, are components subject to tribological stress. Gear applications made of thermoplastic materials are, for example, widespread.

[0009] For example, a tribologically modified polyoxymethylene molding compound is described in the publication DE 10 2005 035 334 A1.

[0010] The use of polyoxymethylene is traditionally limited to low to medium average molecular weights of no more than 300,000 g / mol. This is because, with increasing molecular weight, polyoxymethylene becomes too viscous to be injection molded on conventional injection molding machines and also decomposes under increasing shear forces. R. 416435

[0011] - 2 -

[0012] However, tribologically stressed components, such as gears, are often subject to high mechanical and thermal loads that can push plastic materials to their limits.

[0013] Furthermore, in recent years the requirements for plastic materials have increased for certain applications, such as gear applications and / or sliding applications, and these requirements can generally no longer be met by known plastic materials.

[0014] Disclosure of the invention

[0015] The present invention relates to a molding compound comprising at least one high molecular weight polyoxymethylene with an average molecular weight greater than or equal to 350,000 g / mol and at least one low molecular weight polyoxymethylene with an average molecular weight less than or equal to 150,000 g / mol.

[0016] By combining at least one high-molecular-weight polyoxymethylene with at least one low-molecular-weight polyoxymethylene, it can advantageously be achieved that the high-molecular-weight polyoxymethylene can be processed by injection molding at all.

[0017] This can advantageously make the molding compound suitable for machine processing.

[0018] Due to the high molecular weight of the at least one high molecular weight polyoxymethylene, mechanical properties such as strength, stiffness, creep resistance, elongation at break, impact strength and / or fracture toughness of molded parts and / or components formed from the molding compound can be advantageously improved.

[0019] The at least one low-molecular-weight polyoxymethylene advantageously improves both the flow behavior and the R. 416435

[0020] - 3 -

[0021] The crystallization behavior of at least one high-molecular-weight polyoxymethylene is improved.

[0022] For example, the inclusion of at least one low-molecular-weight polyoxymethylene can reduce the high viscosity of the at least one high-molecular-weight polyoxymethylene, which would otherwise lead to high injection pressures, high internal mold pressures, and reduced molding accuracy in an injection molding process when using unmodified, high-molecular-weight polyoxymethylene. This improves the flow behavior and thus the processability and molding accuracy of the molding compound. In particular, shear-induced degradation phenomena can be avoided.

[0023] For example, the use of at least one low-molecular-weight polyoxymethylene can advantageously reduce the injection pressure and / or the mold cavity pressure and / or the cycle time with regard to processability. The at least one low-molecular-weight polyoxymethylene can thus be used in a variety of ways.

[0024] Polyoxymethylene has a particularly advantageous effect on the injection pressure. By reducing the injection pressure – and thus also the holding pressure – it is advantageous not only to achieve machinability of the molding compound, but also, in particular, to reduce the associated shear forces and thus avoid shear-induced degradation phenomena.

[0025] With regard to imaging accuracy, the at least one low molecular weight polyoxymethylene can advantageously reduce or avoid imaging errors, so-called black specks.

[0026] In particular, the inclusion of at least one low-molecular-weight polyoxymethylene can further improve, and especially increase, the crystallization behavior of the molding compound, especially the spherulite size homogeneity, as well as the temperature stability and the modulus of elasticity, and thus also the mechanical properties, especially the strength, stiffness, creep resistance, elongation at break, impact strength and / or fracture toughness, at room temperature and / or higher temperatures, especially the heat deflection temperature, of components formed from the molding compound, R. 416435

[0027] - 4 - will be. The inclusion of at least one low-molecular-weight polyoxymethylene can have a particularly advantageous effect on the elongation at break.

[0028] The combination of at least one high-molecular-weight polyoxymethylene with at least one low-molecular-weight polyoxymethylene advantageously also enables the mechanical properties, in particular the strength, stiffness, creep resistance, modulus of elasticity, elongation at break, impact strength and / or fracture toughness, at room temperature and / or higher temperatures, especially the heat deflection temperature, to be improved in tribologically stressed components such as gears, helical gears, slides, sleds, bearings, bushings, actuators, guides, transmissions, motors, etc., and especially also in tribologically (highly) stressed components, for example also high-performance components such as gears, for which other polyoxymethylene systems, for example polyoxymethylene systems based on polyoxymethylene with an exclusively low average molecular weight of less than 350, have so far proven suitable.000 g / mol and / or fiber-reinforced or fiber-filled polyoxymethylene systems have not proven to be effective, particularly due to the degradation sensitivity of polyoxymethylene under temperature and shear stress.

[0029] Furthermore, such a molding compound can also improve the performance of a component formed from it in an application, for example in a gear application and / or sliding application, for example in a motor or in a gearbox, for example the efficiency and / or the transmissible torque.

[0030] Furthermore, at least one low-molecular-weight polyoxymethylene can advantageously be added directly on an injection molding machine, for example via a gravimetric and / or volumetric dosing system, such as a powder dosing system, on the injection molding machine, which can be connected, for example, via the main feed of the injection molding machine and / or may optionally also include a premix, to which at least one high-molecular-weight polyoxymethylene is added. This allows R. 416435

[0031] - 5 - Advantageously, a prior compounding process step is avoided, thereby minimizing shear and temperature stress on the polyoxymethylene, which could lead to its degradation. Alternatively, it is also possible to add at least one low-molecular-weight polyoxymethylene beforehand in a compounder and then use the resulting molding compound in an injection molding process step to produce a component.

[0032] Overall, the molding compound makes it easy to provide tribologically stressed components, especially high-performance components, for example for gear applications and / or sliding applications, with improved properties, for example with improved efficiency and / or with increased transmissible torque.

[0033] The molding compound may in particular have a polymer matrix which is based at least substantially on at least one high molecular weight polyoxymethylene.

[0034] In one embodiment, the at least one high-molecular-weight polyoxymethylene has an average molecular weight in the range of > 350,000 g / mol to < 500,000 g / mol. In particular, the at least one high-molecular-weight polyoxymethylene can have an average molecular weight in the range of > 400,000 g / mol to < 500,000 g / mol. For example, the at least one high-molecular-weight polyoxymethylene can have an average molecular weight in the range of > 400,000 g / mol to < 460,000 g / mol. This has proven advantageous with regard to the mechanical properties, such as strength, stiffness, creep resistance, elongation at break, impact strength, and / or fracture toughness, of molded parts and / or components formed from the molding compound.

[0035] In particular, the at least one high molecular weight polyoxymethylene can have an average molecular weight greater than 400,000 g / mol. For example, the at least one high molecular weight polyoxymethylene can have an average molecular weight in the range of > 410,000 g / mol to < R. 416435

[0036] - 6 -

[0037] 460,000 g / mol, for example, of approximately 430,000 g / mol. This has proven particularly advantageous with regard to the mechanical properties, such as strength, stiffness, creep resistance, elongation at break, impact strength and / or fracture toughness, of molded parts and / or components formed from the molding compound.

[0038] The average molecular weight can be determined, for example, using a polymethyl methacrylate standard (PMMA standard) by size exclusion chromatography or gel permeation chromatography (GPC). Gel permeation chromatography with the polymethyl methacrylate standard specifically determines the weight average Mw. Therefore, the average molecular weight values ​​given within the scope of the present invention refer to the weight average Mw.To determine the average molecular weight, especially the weight mean Mw, gel permeation chromatography can be performed, in particular with a polymethyl methacrylate standard (PMMA standard), with a hexafluoroisopropanol (HFIP) potassium trifluoroacetate solvent containing 7.6 g of potassium trifluoroacetate per 1 liter of hexafluoroisopropanol, at a flow rate of 1.0 mL / min, at a temperature of 35 °C, with two PFG columns, for example, two PFG linear M columns with a length of 30 cm and a diameter of 0.8 cm from the manufacturer PSS (Polymer Standards Service), and with a PFG guard column, for example, a PFG guard column with a length of 5 cm and a diameter of 0.8 cm from the manufacturer PSS (Polymer Standards Service).

[0039] In a further embodiment, the at least one low-molecular-weight polyoxymethylene has an average molecular weight in the range of > 50,000 g / mol to < 150,000 g / mol. For example, the at least one low-molecular-weight polyoxymethylene can have an average molecular weight in the range of > 70,000 g / mol to < 150,000 g / mol, for example, from > 100,000 g / mol to < 135,000 g / mol. This has proven to be particularly advantageous with regard to the overall performance of the molding compound and of molded parts and / or components formed therefrom, and especially with regard to the injection pressure, the cavity pressure, the spherulite size, the modulus of elasticity, the elongation at break, and the heat deflection temperature, and is described in R. 416435.

[0040] - 7 -

[0041] It has proven to be particularly advantageous with regard to injection pressure, modulus of elasticity, elongation at break and heat resistance.

[0042] The at least one low molecular weight polyoxymethylene can, in particular, be a component of the polymer matrix of the molding compound.

[0043] In a further embodiment, the molding compound contains, based on the total weight of the molding compound, > 1.000 wt.% to < 15.000 wt.% of the at least one low molecular weight polyoxymethylene. In particular, the molding compound can contain, based on the total weight of the molding compound, > 1.000 wt.% to < 12.000 wt.%, for example, > 1.000 wt.% to < 10.000 wt.%, or, for example, > 1.000 wt.% to < 8.000 wt.%, the at least one low molecular weight polyoxymethylene. For example, the molding compound can contain, based on the total weight of the molding compound, > 1.500 wt.% to < 7.500 wt.% of the at least one low molecular weight polyoxymethylene.This has proven to be particularly advantageous with regard to the overall performance of the molding compound and of molded parts and / or components formed from it, and especially with regard to the injection pressure, the internal mold pressure, the spherulite size, the modulus of elasticity, the elongation at break and the heat deflection temperature.

[0044] In a further embodiment, the molding compound additionally contains at least one carbodiimide. The at least one carbodiimide advantageously improves both the flow behavior and the crystallization behavior of the at least one high-molecular-weight polyoxymethylene. In particular, the at least one carbodiimide can improve the crystallization behavior of the molding compound, especially the spherulite size homogeneity, as well as the temperature stability and the modulus of elasticity, and thus also the mechanical properties, especially the strength, stiffness, creep resistance, elongation at break, impact strength and / or fracture toughness, at room temperature and / or higher temperatures, especially the heat deflection temperature, as described in R. 416435.

[0045] - 8 -

[0046] The molding compound used to form components can be further improved, in particular increased.

[0047] In a further embodiment, the at least one carbodiimide is a polymeric carbodiimide. This has proven advantageous with regard to the overall performance of the molding compound and of molded parts and / or components formed therefrom, and in particular with regard to the injection pressure, the cavity pressure, the spherulite size, the modulus of elasticity, and the heat deflection temperature.

[0048] In a further embodiment, the at least one carbodiimide has an average molecular weight in the range of > 5,000 g / mol to < 50,000 g / mol. For example, the at least one carbodiimide can have an average molecular weight in the range of > 10,000 g / mol to < 40,000 g / mol, for example, from > 15,000 g / mol to < 35,000 g / mol, for example, approximately 25,000 g / mol. This has proven advantageous with regard to the overall performance of the molding compound and of molded parts and / or components formed therefrom, and in particular with regard to the injection pressure, the cavity pressure, the spherulite size, the modulus of elasticity, and the heat deflection temperature.

[0049] At least one carbodiimide may be present in the molding compound, particularly as an additive.

[0050] In a further embodiment, the molding compound contains, based on the total weight of the molding compound, > 0.100 wt.% to < 2.000 wt.%, for example > 0.100 wt.% to < 1.900 wt.%, at least one carbodiimide. In particular, the molding compound can contain, based on the total weight of the molding compound, > 0.100 wt.% to < 1.850 wt.%, for example > 0.200 wt.% to < 1.800 wt.%, for example > 0.300 wt.% to < 1.700 wt.%, for example > 0.400 wt.% to < 1.600 wt.%, for example > 0.500 wt.% to < 1.500 wt.%, for example > 0.600 wt.% to < 1.400 wt.%, at least one carbodiimide. For example, the molding compound, based on the total weight of the molding compound, can be > 0.600 wt.% to < 1.350 wt.%, for example > 0.700 wt.% R. 416435

[0051] - 9 - to < 1.300 wt.%, containing at least one carbodiimide. This has proven advantageous with regard to the overall performance of the molding compound and of molded parts and / or components formed therefrom, and in particular with regard to the injection pressure, the cavity pressure, the spherulite size, the modulus of elasticity and the heat deflection temperature.

[0052] In a further embodiment, the molding compound additionally contains at least one fatty acid ester, in particular an organic one. This advantageously allows for further improvement, and in particular an increase, of the flow behavior, crystallization behavior (especially spherulite size homogeneity), temperature stability, and modulus of elasticity, and thus also of the mechanical properties, in particular strength, stiffness, creep resistance, elongation at break, impact strength, and / or fracture toughness, at room temperature and / or higher temperatures, especially heat deflection temperature, of components formed from the molding compound.The combination of at least one carbodiimide with at least one fatty acid ester has proven to be particularly advantageous with regard to the overall performance of the molding compound and of molded parts and / or components formed therefrom, and especially with regard to the injection pressure, the cavity pressure, the spherulite size and the modulus of elasticity.

[0053] For example, at least one fatty acid ester can be an ester of a fatty acid, for example with 10 to 40 carbon atoms, for example with 10 to 30 carbon atoms, with a polyhydric alcohol, for example with 2 to 30 carbon atoms, for example with 2 to 6 carbon atoms.

[0054] For example, at least one fatty acid ester can be an ester of a fatty acid, for example with 10 to 22 carbon atoms, such as stearic acid, palmitic acid, linoleic acid, capric acid, lauric acid, myristic acid, behenic acid, or erucic acid, with a polyhydric alcohol, for example with 2 to 6 carbon atoms, such as pentaerythritol, glycerol, sorbitol, diglycerol, ethylene glycol, diethylene glycol, or butanediol. R. 416435

[0055] - 10 -

[0056] In another embodiment, the at least one fatty acid ester has an average molecular weight of < 2,000 g / mol. For example, the at least one fatty acid ester can have an average molecular weight of < 1,500 g / mol, for instance, < 1,250 g / mol. This has proven advantageous for processing the molding compound. For example, the at least one fatty acid ester can have an average molecular weight in the range of > 500 g / mol to < 2,000 g / mol, for instance, < 1,500 g / mol, for instance, < 1,250 g / mol. Fatty acid esters with such an average molecular weight have proven advantageous with regard to processing the molding compound.

[0057] In a further embodiment, the at least one fatty acid ester is an ester of a fatty acid with 10 to 22 carbon atoms, in particular with 10 to 18 carbon atoms, especially of stearic acid, palmitic acid, linoleic acid, capric acid, lauric acid or myristic acid, with a polyhydric, aliphatic saturated alcohol with 2 to 6 carbon atoms. Polyhydric, aliphatic saturated alcohols with 2 to 6 carbon atoms have proven advantageous with regard to the processing of the molding compound.

[0058] In one embodiment of this system, the polyhydric aliphatic saturated alcohol is at least trihydric and / or has > 3 to < 6 carbon atoms. For example, the at least trihydric aliphatic saturated alcohol can be pentaerythritol, glycerol, or sorbitol. Alternatively, the polyhydric aliphatic alcohol can have > 3 to < 5 carbon atoms, for example, 5 carbon atoms. In particular, the polyhydric aliphatic saturated alcohol can be at least tetrahydric. For example, the at least trihydric, and in particular tetrahydric, aliphatic saturated alcohol can be pentaerythritol or glycerol, especially pentaerythritol.This has proven particularly advantageous with regard to the overall performance of the molding compound and of the molded parts and / or components formed therefrom, and especially with regard to the injection pressure, the cavity pressure, the spherulite size, the modulus of elasticity, and the heat deflection temperature. R. 416435.

[0059] - 11 -

[0060] In a further embodiment of this design, the fatty acid has > 16 to < 18 carbon atoms, for example 18 carbon atoms, and / or is stearic acid, palmitic acid, or linoleic acid, in particular stearic acid. This has proven to be particularly advantageous with regard to the overall performance of the molding compound and of molded parts and / or components formed therefrom, and especially with regard to the injection pressure, the cavity pressure, the spherulite size, the modulus of elasticity, and the heat deflection temperature.

[0061] In a specific embodiment of this design, the at least one fatty acid ester comprises or is pentaerythrityl tetrastearate, for example with a molecular weight of 1200 g / mol.

[0062] The at least one fatty acid ester may be present in the molding compound, particularly as an additive.

[0063] For example, the molding compound, based on the total weight of the molding compound, can contain > 0.000 wt.% to < 1.000 wt.%, for example > 0.100 wt.% to < 1.000 wt.%, for example > 0.100 wt.% to < 0.500 wt.%, for example > 0.100 wt.% to < 0.200 wt.%, for example > 0.100 wt.% to < 0.150 wt.%, in which at least one fatty acid ester of the at least one fatty acid ester is present.

[0064] In a further embodiment, the molding compound contains, based on its total weight, > 0.100 wt.% to < 0.150 wt.% of the at least one fatty acid ester. In particular, the molding compound can contain, based on its total weight, > 0.105 wt.% to < 0.145 wt.%, for example, > 0.110 wt.% to < 0.140 wt.% of the at least one fatty acid ester. For example, the molding compound can contain, based on its total weight, > 0.115 wt.% to < 0.135 wt.% of the at least one fatty acid ester. Studies have shown that an optimum modulus of elasticity can be found precisely in the range between > 0.100 wt.% and < 0.150 wt.% fatty acid esters. Therefore, by adding > 0.100 wt.% to < 0.150 wt.% fatty acid esters, the modulus of elasticity and thus the mechanical properties of [material] from R. 416435 can be improved.

[0065] - 12 -

[0066] The molding compound used to form molded parts and / or components can be further improved.

[0067] Advantageously, a significantly improved molding compound and consequently significantly improved molded parts and / or components can be produced from the high-molecular-weight polyoxymethylene and the aforementioned additives and admixtures, particularly by adding the at least one low-molecular-weight polyoxymethylene alone or, for example, by adding a combination of the at least one low-molecular-weight polyoxymethylene with the at least one carbodiimide and / or the at least one fatty acid ester. Therefore, it is fundamentally possible to form the molding compound solely from the at least one high-molecular-weight polyoxymethylene and the at least one low-molecular-weight polyoxymethylene, optionally in combination with the at least one carbodiimide and / or the at least one fatty acid ester. In this way, a significantly improved molding compound can advantageously be produced in a very simple manner.

[0068] However, it is still generally possible to add one or more additional additives to the molding compound.

[0069] In a further embodiment, the molding compound further contains at least one metal salt of a fatty acid. In particular, the molding compound can contain at least one calcium salt of a fatty acid. The fatty acid can be, for example, a fatty acid with 10 to 40 carbon atoms, for example, with 10 to 30 carbon atoms, in particular with 10 to 22 carbon atoms, such as stearic acid, palmitic acid, linoleic acid, capric acid, lauric acid, myristic acid, behenic acid, or erucic acid. In particular, the fatty acid can be a fatty acid with 10 to 18 carbon atoms, in particular with > 16 to < 18 carbon atoms, such as stearic acid, palmitic acid, or linoleic acid, in particular stearic acid. The metal salt can be, for example, a calcium salt or a magnesium salt. In particular, the metal salt can be a calcium salt. For example, the metal salt can be a metal stearate, such as calcium stearate and / or magnesium stearate, R. 416435

[0070] - 13 - in particular calcium stearate. This may have a beneficial effect on processability and / or imaging accuracy.

[0071] At least one metal salt of a fatty acid may be included in the molding compound, particularly as an additive.

[0072] For example, the molding compound, based on the total weight of the molding compound, can contain > 0.000 wt.% to < 1.000 wt.%, for example > 0.100 wt.% to < 1.000 wt.%, for example > 0.100 wt.% to < 0.600 wt.%, in which at least one metal salt of a fatty acid is present.

[0073] In a further embodiment, however, the molding compound contains, based on the total weight of the molding compound, > 0.400 wt.% to < 0.600 wt.%, in particular > 0.500 wt.% to < 0.600 wt.%, at least one metal salt, in particular a calcium salt and / or magnesium salt, of a fatty acid, for example stearic acid, for example calcium stearate and / or magnesium stearate, in particular calcium stearate. In this way, the injection pressure can optionally be further improved.

[0074] Alternatively or additionally, it is generally possible to add at least one further additive to the molding compound, for example at least one (further) stabilizer, for example at least one sterically hindered phenol, for example ethylene bis(oxyethylene)bis-(3-(5-tert-butyl-4-hydroxy-m- tolyl)propionate (trade name: Irganox 245), and / or at least one (other) antioxidant and / or at least one (further) flow aid and / or at least one formaldehyde scavenger.

[0075] For example, the molding compound, based on the total weight of the molding compound, can contain > 0.000 wt.% to < 1.000 wt.%, for example > 0.100 wt.% to < 1.000 wt.%, for example > 0.100 wt.% to < 0.600 wt.%, in which at least one further additive is present.

[0076] In a further embodiment, the molding compound contains, based on the total weight of the molding compound, > 0.100 wt.% to < 3.000 wt.%, in particular > 0.100 wt.% to < 2.000 wt.%, additives, in particular R. 416435.

[0077] - 14 - the at least one carbodiimide and / or the at least one fatty acid ester and / or the at least one metal salt of a fatty acid and / or the at least one further additive, in total. The at least one low-molecular-weight polyoxymethylene can, in particular, be attributed to the polymer matrix, as can the at least one high-molecular-weight polyoxymethylene. A high polymer matrix content and a low additive content can be advantageous. As explained in more detail later, the total additive content can be even lower in specific embodiments.

[0078] In another embodiment, the at least one high molecular weight polyoxymethylene is a polyoxymethylene homo- or copolymer.

[0079] A polyoxymethylene homopolymer can be understood in particular as a polymer which is composed solely of -CH2O repeat units.

[0080] A polyoxymethylene copolymer can be understood to be, in particular, a polymer which, in addition to -CH2O repeat units, comprises at least one other type of repeat unit. Specifically, in the polyoxymethylene copolymer, the -CH2O repeat units can constitute more than half, for example, more than 60%, 70%, or 80%, for example, more than 90%, possibly even more than 95% or more than 97% of all repeat units.

[0081] In one embodiment of this design, the at least one high-molecular-weight polyoxymethylene is a polyoxymethylene homopolymer. This has proven particularly advantageous for using the molding compound to form tribologically highly stressed components, especially high-performance components.

[0082] In another embodiment, the at least one low-molecular-weight polyoxymethylene is a polyoxymethylene homo- or copolymer. R. 416435

[0083] - 15 -

[0084] In one embodiment of this design, the at least one low-molecular-weight polyoxymethylene is a polyoxymethylene homopolymer. This has proven particularly advantageous for using the molding compound to form tribologically highly stressed components, especially high-performance components.

[0085] In a further embodiment, the molding compound contains, based on the total weight of the molding compound, > 82.000 wt.%, for example > 82.850 wt.% or > 82.950 wt.%, at least one high molecular weight polyoxymethylene. For example, the molding compound, based on the total weight of the molding compound, can be > 83.000 wt.%, for example > 83.050 wt.% or > 83.100 wt.% or > 83.150 wt.% or > 83.200 wt.% or > 83.250 wt.% or > 83.300 wt.% or > 83.350 wt.% or > 83.400 wt.% or > 83.450 wt.% or > 83.500 wt.% or > 83.550 wt.% or > 83.600 wt.% or > 83.650 wt.% or > 83.700 wt.% or > 84.000 wt.%, for example > 84.850 wt.% or > 84.855 wt.% > 84.860 wt.% or > 84.865 wt.%, in which at least one high molecular weight Contains polyoxymethylene. In particular, the molding compound may contain > 85,000 wt% of at least one high molecular weight polyoxymethylene, based on the total weight of the molding compound.This has proven advantageous with regard to the mechanical properties, such as strength, stiffness, creep resistance, elongation at break, impact strength and / or crack toughness, of molded parts and / or components formed from the molding compound.

[0086] In a specific embodiment of this design, the molding compound contains, based on the total weight of the molding compound, > 87.000 wt. %, for example > 87.850 wt. %, or > 87.950 wt. %, of at least one high molecular weight polyoxymethylene.

[0087] In a further specific embodiment of this design, the molding compound contains, based on the total weight of the molding compound, > 88.000 wt.%, for example > 88.050 wt.% or > 88.100 wt.% or > 88.150 wt.% or > 88.200 wt.% or > 88.250 wt.% or > 88.300 wt.% or > 88.350 wt.% or > 88.400 wt.% or > 88.450 wt.% R. 416435

[0088] - 16 - or > 88.500 wt.% or > 88.550 wt.% or > 88.600 wt.% or > 88.650 wt.% or > 88.700 wt.%, containing at least one high molecular weight polyoxymethylene.

[0089] In a further specific embodiment of this design, the molding compound contains, based on the total weight of the molding compound, > 89.000 wt.%, for example > 89.500 wt.%, for example > 89.850 wt.%, optionally > 89.855 wt.% or > 89.860 wt.% or > 89.865 wt.%, for example > 89.950 wt.%, of at least one high molecular weight polyoxymethylene.

[0090] In a further specific embodiment of this design, the molding compound contains, based on the total weight of the molding compound, > 90.000 wt.%, for example > 90.050 wt.% or > 90.100 wt.% or > 90.150 wt.% or > 90.200 wt.% or > 90.250 wt.% or > 90.300 wt.% or > 90.350 wt.% or > 90.400 wt.% or > 90.450 wt.%, at least one high molecular weight polyoxymethylene. For example, the molding compound, based on the total weight of the molding compound, may contain > 90.500 wt.%, for example > 90.550 wt.% or > 90.600 wt.% or > 90.650 wt.% or > 90.700 wt.% or > 90.750 wt.% or > 90.800 wt.% or > 90.850 wt.% or > 90.900 wt.% or > 90.950 wt.%, in which at least one high molecular weight polyoxymethylene is present.

[0091] In a further special embodiment of this design, the molding compound contains, in relation to the total weight of the molding compound, even

[0092] > 91.000 wt.%, for example > 91.050 wt.% or > 91.100 wt.% or

[0093] > 91.150 wt.% or > 91.200 wt.%, containing at least one high molecular weight polyoxymethylene.

[0094] In a further specific embodiment, the molding compound contains, based on the total weight of the molding compound, > 92.000 wt.%, for example > 92.350 wt.%, optionally > 92.355 wt.% or > 92.360 wt.% or > 92.365 wt.%, for example > 92.500 wt.%, of at least one high molecular weight polyoxymethylene. R. 416435

[0095] - 17 -

[0096] These designs have proven to be particularly advantageous with regard to the mechanical properties, such as strength, stiffness, creep resistance, elongation at break, impact strength and / or crack toughness, of molded parts and / or components formed from the molding compound.

[0097] In a further embodiment, the molding compound contains, based on the total weight of the molding compound, > 97.000 wt.% of the at least one high-molecular-weight polyoxymethylene and the at least one low-molecular-weight polyoxymethylene in total. For example, the molding compound can contain, based on the total weight of the molding compound, > 97.850 wt.%, for example > 97.855 wt.%, > 97.860 wt.%, or > 97.865 wt.%, for example > 97.950 wt.%, for example > 97.955 wt.%, or > 97.960 wt.%, or > 97.965 wt.%, of the at least one high-molecular-weight polyoxymethylene and the at least one low-molecular-weight polyoxymethylene in total.

[0098] In a specific embodiment of this design, the molding compound contains, based on the total weight of the molding compound, > 98.000 wt.% of the at least one high-molecular-weight polyoxymethylene and the at least one low-molecular-weight polyoxymethylene in total. For example, the molding compound can also contain, based on the total weight of the molding compound, > 98.000 wt.%, optionally even > 99.000 wt.% and / or < 100.000 wt.% of the at least one high-molecular-weight polyoxymethylene and the at least one low-molecular-weight polyoxymethylene in total. For example, the molding compound, based on the total weight of the molding compound, may be > 98.005 wt.% or > 98.010 wt.% or > 98.015 wt.%, for example > 98.050 wt.%, optionally > 98.055 wt.% or > 98.060 wt.% or > 98.065 wt.%, for example > 98.100 wt.% or > 98.150 wt.%, optionally > 98.155 wt.% or > 98.160 wt.% or > 98.165 wt.%, for example > 98.200 wt.% or > 98.250 wt.%.-%, if applicable > 98.255 wt.% or > 98.260 wt.% or > 98.265 wt.%, for example > 98.300 wt.% or > 98.350 wt.%, if applicable > 98.355 wt.% or > 98.360 wt.% or > 98.365 wt.%, for example > 98.400 wt.% or > 98.450 wt.%, R. 416435.

[0099] - 18 - optionally > 98.455 wt.% or > 98.460 wt.% or > 98.465 wt.%, for example > 98.500 wt.%, optionally > 98.505 wt.% or > 98.510 wt.% or > 98.515 wt.%, for example > 98.550 wt.%, optionally > 98.555 wt.% or > 98.560 wt.% or > 98.565 wt.%, for example > 98.600 wt.% or > 98.650 wt.%, for example > 98.700 wt.%, for example > 99.000 wt.%, for example > 99.850 wt.%, optionally > 99.855 wt.% or > 99.860 wt.% or > 99.865 wt.%, optionally even 100 wt.%, in which at least one high molecular weight polyoxymethylene and containing at least one low molecular weight polyoxymethylene in total.

[0100] This has proven to be particularly advantageous with regard to the mechanical properties, such as strength, stiffness, creep resistance, elongation at break, impact strength and / or crack toughness, of molded parts and / or components formed from the molding compound.

[0101] In these and other embodiments and configurations, the lower weight percent limit of the at least one high-molecular-weight polyoxymethylene can, for example, correspond to the sum of the upper weight percent limits of the at least one low-molecular-weight polyoxymethylene and / or the optional at least one carbodiimide and / or the optional at least one fatty acid ester and / or the optional at least one metal salt of a fatty acid and / or the optional at least one further additive, in particular to the sum of the upper weight percent limits of the at least one low-molecular-weight polyoxymethylene and / or the optional at least one carbodiimide and / or the optional at least one fatty acid ester.

[0102] In these and other embodiments and configurations, the lower weight percent limit of the sum of the at least one high-molecular-weight polyoxymethylene and the at least one low-molecular-weight polyoxymethylene can, for example, be the sum of the upper weight percent limits of the optional at least one carbodiimide and / or the optional at least one fatty acid ester and / or the optional at least one metal salt of a fatty acid and / or the optional R. 416435

[0103] - 19 - correspond to at least one further additive, in particular to the sum of the weight percent limits of the optional at least one carbodiimide and / or the optional at least fatty acid ester.

[0104] In a further embodiment, the molding compound contains, based on the total weight of the molding compound, (up to) < 100,000 wt.%, in particular

[0105] < 99.900 wt.%, optionally < 99.895 wt.% or < 99.890 wt.% or

[0106] < 99.885 wt.%, comprising at least one high molecular weight polyoxymethylene and at least one low molecular weight polyoxymethylene in total. For example, the molding compound, based on the total weight of the molding compound, can be (up to) < 99.800 wt.%, optionally < 99.795 wt.% or < 99.790 wt.% or < 99.785 wt.%, for example < 99.700 wt.%, optionally < 99.695 wt.% or < 99.690 wt.% or < 99.685 wt.%, for example < 99.600 wt.%, optionally < 99.595 wt.% or < 99.590 wt.% or < 99.585 wt.%, for example < 99.500 wt.%, optionally < 99.495 wt.% or < 99.490 wt.% or < 99.485 wt.%, for example < 99.400 wt.%, optionally < 99.395 wt.% or < 99.390 wt.% or < 99.385 wt.%, for example < 99.300 wt.%, optionally < 99.295 wt.% or < 99.290 wt.% or < 99.285 wt.%, for example < 99.200 wt.%, optionally < 99.195 wt.% or < 99.190 wt.% or < 99.185 wt.%-%, containing at least one high-molecular-weight polyoxymethylene and at least one low-molecular-weight polyoxymethylene in total. This has proven particularly advantageous with regard to the mechanical properties, such as strength, stiffness, creep resistance, elongation at break, impact strength and / or fracture toughness, of molded parts and / or components formed from the molding compound.

[0107] In these and other configurations and embodiments, the upper weight percent limit of the at least one high-molecular-weight polyoxymethylene can, for example, be the sum of the lower weight percent limits of the at least one low-molecular-weight polyoxymethylene and / or the optional at least one carbodiimide and / or the optional at least one fatty acid ester and / or the optional at least one metal salt of a fatty acid and / or the optional at least one further additive, R. 416435

[0108] - 20 - in particular correspond to the sum of the weight percent lower limits of the at least one low molecular weight polyoxymethylene and / or the optional at least one carbodiimide and / or the optional at least fatty acid ester.

[0109] In these and other embodiments and configurations, the upper weight percent limit of the sum of the at least one high molecular weight polyoxymethylene and the at least one low molecular weight polyoxymethylene can, for example, correspond to the sum of the lower weight percent limits of the optional at least one carbodiimide and / or the optional at least one fatty acid ester and / or the optional at least one metal salt of a fatty acid and / or the optional at least one further additive, in particular to the sum of the lower weight percent limits of the optional at least one carbodiimide and / or the optional at least fatty acid ester.

[0110] The molding compound may contain at least one high molecular weight polyoxymethylene in a proportion of, for example, (up to) < 99.000 wt.%, for example < 98.900 wt.%, optionally < 98.895 wt.% or < 98.890 wt.% or < 98.885 wt.%, for example < 98.800 wt.% or < 98.700 wt.% or < 98.600 wt.%. In particular, the molding compound may contain < 98.500 wt.%, based on the total weight of the molding compound, for example < 98.495 wt.% or < 98.490 wt.% or < 98.485 wt.%, for example < 98.400 wt.%, for example < 98.395 wt.% or < 98.390 wt.% or < 98.385 wt.%, for example < 98.300 wt.% or < 98.200 wt.% or < 98.100 wt.% or < 98.000 wt.% or < 97.900 wt.% or < 97.800 wt.% or < 97.700 wt.%.This has proven to be particularly advantageous with regard to the mechanical properties, such as strength, stiffness, creep resistance, elongation at break, impact strength and / or crack toughness, of molded parts and / or components formed from the molding compound.

[0111] In a specific embodiment, the remainder of the molding compound in these and other embodiments and configurations can be formed by at least one high-molecular-weight polyoxymethylene. R. 416435

[0112] - 21 -

[0113] In another embodiment, the molding compound contains, based on the total weight of the molding compound,

[0114] > 82,000 wt.%, for example > 87,000 wt.%, in particular > 88,000 wt.%, for example > 89,000 wt.% or > 89,500 wt.%, for example > 90,000 wt.%, for example > 90,500 wt.%, in which at least one high molecular weight polyoxymethylene, and

[0115] > 1,000 wt.% to < 15,000 wt.%, for example > 1,000 wt.% to < 12,000 wt.%, in particular > 1,000 wt.% to < 10,000 wt.%, for example > 1,000 wt.% to < 8,000 wt.%, for example > 1,500 wt.% to < 7,500 wt.%, in which at least one low molecular weight polyoxymethylene, and / or

[0116] > 0.000 wt.% to < 2.000 wt.%, in particular > 0.100 wt.% to < 2.000 wt.%, for example > 0.100 wt.% to < 1.900 wt.%, in particular > 0.100 wt.% to < 1.850 wt.%, for example > 0.200 wt.% to < 1.800 wt.%, for example > 0.300 wt.% to < 1.700 wt.%, for example > 0.400 wt.% to < 1.600 wt.%, for example

[0117] > 0.500 wt.% to < 1.500 wt.%, for example > 0.600 wt.% to < 1.400 wt.%, in particular > 0.600 wt.% to < 1.350 wt.%, for example > 0.700 wt.% to < 1.300 wt.%, in which at least one carbodiimide, and / or

[0118] > 0.000 wt.% to < 1.000 wt.%, for example > 0.100 wt.% to < 0.150 wt.%, in particular > 0.100 wt.% to < 0.150 wt.%, for example > 0.105 wt.% to < 0.145 wt.%, for example > 0.110 wt.% to < 0.140 wt.%, for example > 0.115 wt.% to < 0.135 wt.%, in which at least one fatty acid ester, and / or

[0119] > 0.000 wt.% to < 1.000 wt.%, for example > 0.100 wt.% to < 1.000 wt.%, for example > 0.500 wt.% to < 0.600 wt.%, containing at least one metal salt of a fatty acid, and / or

[0120] > 0.000 wt.% to < 1.000 wt.%, for example > 0.100 wt.% to < 1.000 wt.%, for example > 0.100 wt.% to < 0.600 wt.%, containing at least one further additive or consisting thereof. This has been shown with regard to the mechanical properties, such as strength, stiffness, creep resistance, elongation at break, impact strength and / or fracture toughness, from R. 416435

[0121] - 22 -

[0122] Molding compound has proven advantageous for formed molded parts and / or components.

[0123] The molding compound may contain, based on its total weight, optionally > 97.000 wt.%, in particular > 98.000 wt.%, of at least one high-molecular-weight polyoxymethylene and at least one low-molecular-weight polyoxymethylene in total. The molding compound may contain, for example, a total of > 0.100 wt.% to < 3.000 wt.%, in particular > 0.100 wt.% to < 2.000 wt.%, based on its total weight, of additives, in particular at least one carbodiimide and / or at least one fatty acid ester and / or at least one metal salt of a fatty acid and / or at least one other additive, and may be formulated, for example, as already explained. With the lowest possible additive content or even no additive content, the molding compound may also contain, for example, > 98.000 wt.%, for example > 99.000 wt.%, optionally even 100 wt.%, based on its total weight.-%, containing at least one high molecular weight polyoxymethylene and at least one low molecular weight polyoxymethylene in total.

[0124] In a particular embodiment, especially in which the molding compound contains at least one high molecular weight polyoxymethylene, at least one low molecular weight polyoxymethylene, at least one carbodiimide, and at least one fatty acid ester, the molding compound contains, based on the total weight of the molding compound,

[0125] > 82.850 wt.%, for example > 87.850 wt.%, for example > 87.950 wt.% or > 88.000 wt.% or > 88.050 wt.% or > 88.150 wt.% or > 88.250 wt.% or > 88.350 wt.% or > 88.450 wt.% or

[0126] > 88.500 wt.% or > 88.550 wt.%, comprising at least one high molecular weight polyoxymethylene, and

[0127] > 1,000 wt.% to < 15,000 wt.%, for example > 1,000 wt.% to < 12,000 wt.%, in particular > 1,000 wt.% to < 10,000 wt.%, for example > 1,000 wt.% to < 8,000 wt.%, for example > 1,500 wt.% to < 7,500 wt.%, in which at least one low molecular weight polyoxymethylene, and R. 416435

[0128] - 23 -

[0129] > 0.100 wt.% to < 2.000 wt.%, for example > 0.100 wt.% to < 1.900 wt.%, in particular > 0.100 wt.% to < 1.850 wt.%, for example > 0.200 wt.% to < 1.800 wt.%, for example > 0.300 wt.% to < 1.700 wt.%, for example > 0.400 wt.% to < 1.600 wt.%, for example > 0.500 wt.% to < 1.500 wt.%, for example > 0.600 wt.% to < 1.400 wt.%, in particular > 0.600 wt.% to < 1.350 wt.%, for example > 0.700 wt.% to < 1.300 wt.%, in which at least one carbodiimide, and

[0130] > 0.100 wt.% to < 0.150 wt.%, in particular > 0.100 wt.% to < 0.150 wt.%, for example > 0.105 wt.% to < 0.145 wt.%, for example > 0.110 wt.% to < 0.140 wt.%, for example > 0.115 wt.% to < 0.135 wt.%, of at least one fatty acid ester, or is formed therefrom. This has proven to be particularly advantageous with regard to the mechanical properties, such as strength, stiffness, creep resistance, elongation at break, impact strength and / or fracture toughness, of molded parts and / or components formed from the molding compound.

[0131] In particular, the molding compound may contain at least one high molecular weight polyoxymethylene, based on the total weight of the molding compound, in more than 89.850 wt.%, for example, > 89.950 wt.%, for example, > 90.000 wt.%, for example, > 90.050 wt.% or > 90.150 wt.% or > 90.250 wt.%, in particular > 90.350 wt.%, for example, > 90.450 wt.% or > 90.500 wt.% or > 90.550 wt.% or > 90.650 wt.% or > 90.750 wt.% or > 90.850 wt.% or > 90.950 wt.%, for example, > 91.000 wt.%, for example, > 91.050 wt.%.

[0132] The molding compound may, based on the total weight of the molding compound, optionally contain (down to) < 98.800 wt.%, for example < 98.700 wt.% or < 98.600 wt.% or < 98.500 wt.% or < 98.400 wt.%, in particular < 98.300 wt.%, for example < 98.200 wt.% or < 98.100 wt.% or < 98.000 wt.% or < 97.900 wt.% or < 97.800 wt.% or < 97.700 wt.%, containing at least one high-molecular-weight polyoxymethylene. R. 416435

[0133] - 24 -

[0134] The molding compound, based on the total weight of the molding compound, can, for example, contain > 97.850 wt.%, e.g., 97.950 wt.%, or > 98.000 wt.%, or > 98.050 wt.%, or > 98.150 wt.%, or > 98.250 wt.%, or > 98.350 wt.%, or > 98.450 wt.%, or > 98.500 wt.%, or > 98.550 wt.%, or > 98.650 wt.%, and / or (up to) < 99.800 wt.%, e.g., < 99.700 wt.%, or < 99.600 wt.%, or < 99.500 wt.%, or < 99.400 wt.%, or < 99.300 wt.%, or < 99.200 wt.%, in which at least one high-molecular-weight polyoxymethylene and at least one low-molecular-weight Total polyoxymethylene content.

[0135] In a further specific embodiment, in particular in which the molding compound contains at least one high molecular weight polyoxymethylene, at least one low molecular weight polyoxymethylene, and at least one carbodiimide, the molding compound contains, based on the total weight of the molding compound,

[0136] > 83.000 wt.%, in particular > 88.000 wt.%, for example > 88.100 wt.% or > 88.150 wt.% or > 88.200 wt.% or > 88.300 wt.% or > 88.400 wt.% or > 88.500 wt.% or > 88.600 wt.% or

[0137] > 88.650 wt% or > 88.700 wt%, comprising at least one high molecular weight polyoxymethylene, and

[0138] > 1,000 wt.% to < 15,000 wt.%, for example > 1,000 wt.% to < 12,000 wt.%, in particular > 1,000 wt.% to < 10,000 wt.%, for example > 1,000 wt.% to < 8,000 wt.%, for example > 1,500 wt.% to < 7,500 wt.%, in which at least one low molecular weight polyoxymethylene, and

[0139] > 0.100 wt.% to < 2.000 wt.%, for example > 0.100 wt.% to < 1.900 wt.%, in particular > 0.100 wt.% to < 1.850 wt.%, for example > 0.200 wt.% to < 1.800 wt.%, for example > 0.300 wt.% to < 1.700 wt.%, for example > 0.400 wt.% to < 1.600 wt.%, for example > 0.500 wt.% to < 1.500 wt.%, for example > 0.600 wt.% to < 1.400 wt.%, in particular > 0.600 wt.% to < 1.350 wt.%, for example > 0.700 wt.% to < 1.300 wt.%, in which at least one carbodiimide is formed, or is formed therefrom. This has been shown with regard to mechanical properties such as strength, stiffness, creep resistance, R. 416435

[0140] - 25 -

[0141] The elongation at break, impact strength and / or fracture toughness of molded parts and / or components formed from the molding compound have proven to be particularly advantageous.

[0142] In particular, the molding compound can constitute > 89.500 wt.% of the total weight of the molding compound, for example > 90.000 wt.%, for example >

[0143] 90.100 wt% or > 90.150 wt% or > 90.200 wt% or > 90.300 wt% or > 90.400 wt% containing at least one high molecular weight polyoxymethylene. For example, the molding compound may contain, based on the total weight of the molding compound, > 90.500 wt%, for example, > 90.600 wt% or > 90.650 wt% or > 90.700 wt% or > 90.800 wt% or > 90.900 wt% containing at least one high molecular weight polyoxymethylene. If applicable, the molding compound may contain, based on the total weight of the molding compound, > 91.000 wt%, for example, > 91.100 wt% or > 91.200 wt% containing at least one high molecular weight polyoxymethylene.

[0144] The molding compound may, based on the total weight of the molding compound, optionally be (down to) < 98.900 wt.%, for example < 98.800 wt.% or < 98.700 wt.% or < 98.600 wt.% or < 98.500 wt.%, in particular <

[0145] 98.400 wt.%, for example < 98.300 wt.% or < 98.200 wt.% or <

[0146] 98.100 wt.% or < 98.000 wt.% or < 97.900 wt.% or < 97.800 wt.% or < 97.700 wt.% containing at least one high molecular weight polyoxymethylene.

[0147] The proportion of the molding compound, based on the total weight of the molding compound, can be, for example, > 98.000 wt.%, for example, > 98.100 wt.% or > 98.150 wt.% or > 98.200 wt.% or > 98.300 wt.% or > 98.400 wt.% or > 98.500 wt.% or > 98.600 wt.% or > 98.650 wt.% or > 98.700 wt.%, and / or (up to) < 99.900 wt.%, for example, < 99.800 wt.% or < 99.700 wt.% or < 99.600 wt.% or < 99.500 wt.% or <

[0148] 99.400 wt% or < 99.300 wt% or < 99.200 wt%, containing at least one high-molecular-weight polyoxymethylene and at least one low-molecular-weight polyoxymethylene in total. R. 416435

[0149] - 26 -

[0150] In a further specific embodiment, in particular in which the molding compound contains at least one high molecular weight polyoxymethylene, at least one low molecular weight polyoxymethylene, and at least one fatty acid ester, the molding compound contains, based on the total weight of the molding compound,

[0151] > 84.850 wt.%, in particular > 89.850 wt.%, for example > 89.855 wt.% or > 89.860 wt.% or > 89.865 wt.%, in particular >

[0152] 91.850 wt.%, for example > 91.855 wt.% or > 91.860 wt.% or > 91.865 wt.%, for example > 92.350 wt.%, for example > 92.355 wt.% or > 92.360 wt.% or > 92.365 wt.%, in which at least one high molecular weight polyoxymethylene and

[0153] > 1,000 wt.% to < 15,000 wt.%, for example > 1,000 wt.% to < 12,000 wt.%, in particular > 1,000 wt.% to < 10,000 wt.%, for example > 1,000 wt.% to < 8,000 wt.%, for example > 1,500 wt.% to < 7,500 wt.%, in which at least one low molecular weight polyoxymethylene, and

[0154] > 0.100 wt.% to < 0.150 wt.%, in particular > 0.100 wt.% to < 0.150 wt.%, for example > 0.105 wt.% to < 0.145 wt.%, for example > 0.110 wt.% to < 0.140 wt.%, for example > 0.115 wt.% to < 0.135 wt.%, of at least one fatty acid ester, or is formed therefrom. This has proven to be particularly advantageous with regard to the mechanical properties, such as strength, stiffness, creep resistance, elongation at break, impact strength and / or fracture toughness, of molded parts and / or components formed from the molding compound.

[0155] The molding compound may contain, for example, (up to) < 98.900 wt.%, for example < 98.895 wt.% or < 98.890 wt.% or < 98.885 wt.%, for example < 98.400 wt.%, for example < 98.395 wt.% or < 98.390 wt.% or < 98.385 wt.%, containing at least one high molecular weight polyoxymethylene.

[0156] For example, the molding compound, based on the total weight of the molding compound, can be > 99.850 wt.%, for example > 99.855 wt.% or > 99.860 wt.% or > 99.865 wt.%, and / or (up to) < 99.900 wt.%, for example R. 416435

[0157] - 27 - to < 99.895 wt.% or < 99.890 wt.% or < 99.885 wt.%, containing at least one high molecular weight polyoxymethylene and at least one low molecular weight polyoxymethylene in total.

[0158] In a further specific embodiment, in particular in which the molding compound contains at least one high molecular weight polyoxymethylene and at least one low molecular weight polyoxymethylene, the molding compound contains, based on the total weight of the molding compound,

[0159] > 85,000 wt.%, in particular > 90,000 wt.%, in particular > 92,000 wt.%, for example > 92,500, in which at least one high molecular weight polyoxymethylene and

[0160] > 1,000 wt.% to < 15,000 wt.%, for example > 1,000 wt.% to < 12,000 wt.%, in particular > 1,000 wt.% to < 10,000 wt.%, for example > 1,000 wt.% to < 8,000 wt.%, for example > 1,500 wt.% to < 7,500 wt.%, which contains or is formed from at least one low molecular weight polyoxymethylene. This has proven to be particularly advantageous with regard to the mechanical properties, such as strength, stiffness, creep resistance, elongation at break, impact strength and / or fracture toughness, of molded parts and / or components formed from the molding compound.

[0161] The molding compound may, for example, contain (up to) < 99.000 wt.%, in particular < 98.500 wt.%, of at least one high molecular weight polyoxymethylene, based on the total weight of the molding compound.

[0162] If necessary, the molding compound may contain, based on the total weight of the molding compound, > 97.000 wt.%, in particular > 98.000 wt.%, for example > 99.000 wt.%, and / or up to < 99.900 wt.%, at least one high molecular weight polyoxymethylene and at least one low molecular weight polyoxymethylene in total, for example to add a small amount of additive.

[0163] In particular, the molding compound can contain (up to <) 100,000 wt.% of the at least one high molecular weight R. 416435, based on the total weight of the molding compound.

[0164] - 28 -

[0165] The polymer mass in this embodiment can consist of at least one high-molecular-weight polyoxymethylene and at least one low-molecular-weight polyoxymethylene. In other words, the polymer mass can be formed from at least one high-molecular-weight polyoxymethylene and at least one low-molecular-weight polyoxymethylene.

[0166] The molding compound according to the invention and molded parts and / or components produced therefrom can be detected, for example, by liquid chromatography coupled with mass spectrometry (LC-MS, HPLC-MS) and / or by Fourier transformation spectroscopy (FT-IR) and / or by inductively coupled plasma optical emission spectrometry (ICP / OS) and / or by size exclusion chromatography or gel permeation chromatography (GPC).

[0167] With regard to further technical features and advantages of the molding compound according to the invention, explicit reference is hereby made to the explanations in connection with the molded part and / or component and / or the device according to the invention, as well as the exemplary embodiments.

[0168] A further object of the invention is a molded part and / or a component which is at least partially formed from a molding compound according to the invention. The molded part and / or component can, in particular, be a mechanical component and / or machine element, for example, a tribologically stressed component and / or machine element. For example, the molded part and / or component can be a gear, for example, a helical gear, a worm gear, a worm, a spur gear, a rack, an elliptical gear, a bevel gear, or a crown gear; or a bearing part, for example, a bearing bushing, in particular a sliding bearing part, for example, a sliding bushing or a sliding element; or a guide, a rail, a slide, a carriage, a roller, an actuator element, or a zipper part. In particular, the molded part and / or component can be a gear. R. 416435

[0169] - 29 -

[0170] For example, the molded part and / or component can be part of a device, such as an actuator and / or a brake or a steering system, for example in the form of a gear, such as a helical gear, or a transmission, for example in the form of a gear, or a motor, for example an electric motor, such as a wiper motor and / or seat adjuster and / or window regulator, for example in the form of a gear, or a bearing or a guide or a sliding device, for example a seat adjuster and / or window regulator, for example in the form of a bearing bushing, such as a sliding bearing bushing or a sliding element or a slide or a sled, or a zipper.

[0171] The invention therefore also relates to a device comprising a molded part and / or component according to the invention. For example, the device can be an actuator and / or a brake or a steering system or a transmission or a motor, for example an electric motor, such as a wiper motor and / or seat adjuster and / or window regulator, or a bearing or a guide or a sliding device, such as a seat adjuster and / or window regulator or a zipper.

[0172] With regard to further technical features and advantages of the molded part and / or component and / or the device according to the invention, explicit reference is hereby made to the explanations in connection with the molding compound according to the invention and the exemplary embodiments.

[0173] Examples

[0174] Further advantages and advantageous embodiments of the invention are illustrated in the examples. It should be noted that the examples are merely descriptive and are not intended to limit the invention in any way.

[0175] In example series 1 to 5, a high molecular weight polyoxymethylene homopolymer (hPOM-H) with an average molecular weight of approximately 430,000 g / mol was directly produced in an injection molding machine R. 416435.

[0176] - 30 - a polymer matrix component or one or two additives in the quantity ranges specified in Table 1 are added and a molded part is formed directly from the resulting molding compound by injection molding.

[0177] In example series 1, a low molecular weight polyoxymethylene homopolymer (nPOM-H) with an average molecular weight in the range of 50,000 g / mol to 150,000 g / mol was used as a polymer matrix component, and its amount was increased in 0.500 wt% steps from 1.000 wt% to 15.000 wt%, in particular while the amount of the high molecular weight polyoxymethylene homopolymer was correspondingly decreased stepwise, so that the sum of the amounts of the components of the compositions resulted in a total of 100 wt%.

[0178] In example series 2 and 3, a polymeric carbodiimide with an average molecular weight of about 25,000 g / mol was used as an additive, and its amount was increased in 0.100 wt% steps from 0.100 wt% to 2.000 wt%, in particular whereby the amount of the high molecular weight polyoxymethylene homopolymer was correspondingly reduced stepwise, so that the sum of the amounts of the components of the compositions resulted in a total of 100 wt%.

[0179] In example series 3 and 4, the fatty acid ester pentaerythrityl tetrastearate was used as an additive and its amount was increased in 0.050 wt% steps from 0.100 wt% to 0.150 wt%, in particular whereby the amount of the high molecular weight polyoxymethylene homopolymer was correspondingly reduced stepwise, so that the sum of the amounts of the components of the compositions resulted in a total of 100 wt%.

[0180] In example series 5, calcium stearate was used as an additive, and its amount was increased in 0.100 wt% increments from 0.400 wt% to 0.600 wt%, in particular while the amount of the high-molecular-weight polyoxymethylene homopolymer was correspondingly decreased stepwise, so that the sum of the amounts of the components of the compositions totaled 100 wt%. R. 416435

[0181] - 31 -

[0182] Table 1: Compositions of example series 1 to 5 in weight percent (wt%) Table 2: Properties of the molding compounds and molded parts from the example series

[0183] 1 to 5 R.416435

[0184] -32 - R. 416435

[0185] - 33 -

[0186] Table 2 shows that in example series 1, the addition of a low-molecular-weight polyoxymethylene homopolymer, for example in an amount ranging from > 1.000 wt% to < 15.000 wt%, as in example series 1 in combination with > 85.000 wt% to < 99.000 wt% high-molecular-weight polyoxymethylene homopolymer, improves the injection pressure and the mold cavity pressure, and thus the processability, compared to unmodified high-molecular-weight polyoxymethylene. Furthermore, the spherulite size, the modulus of elasticity, and the heat deflection temperature, and thus the mechanical properties and performance of a molded part and / or component produced from it, are also improved, and overall good results can be achieved. In addition, the addition of the low-molecular-weight polyoxymethylene homopolymer in example series 1 significantly improved the elongation at break compared to unmodified high-molecular-weight polyoxymethylene.A quantity of low-molecular-weight polyoxymethylene homopolymer in the range of > 1.000 wt.% to < 12.000 wt.%, in particular from > 1.000 wt.% to < 10.000 wt.%, for example from > 1.500 wt.% to < 7.500 wt.%, for example 5.000 wt.% or 10.000 wt.%, for example as in the series of examples, in combination with > 88.000 wt.% to < 99.000 wt.%, in particular > 90.000 wt.% to < 99.000 wt.%, for example > 92.500 wt.% to < 98.500 wt.%, for example 95.000 wt.% or 90.000 wt.%, of high-molecular-weight polyoxymethylene homopolymer proved to be particularly advantageous. R. 416435.

[0187] - 34 -

[0188] In particular, it was shown that excellent results could be achieved with a quantity of approximately 5 wt% low molecular weight polyoxymethylene.

[0189] Table 2 shows that in example series 2, by adding a carbodiimide, for example in a carbodiimide quantity in the range of > 0.100 wt. % to < 2.000 wt. %, for example as in example series 2 in combination with > 98.000 wt. % to < 99.900 wt. % high molecular weight polyoxymethylene homopolymer, - compared with unmodified high molecular weight polyoxymethylene - the injection pressure and the mold cavity pressure and thus the processability are improved, as well as the spherulite size, the modulus of elasticity and the heat deflection temperature and thus the mechanical properties and the performance of a molded part and / or component formed therefrom, and overall good results can be achieved. A carbodiimide quantity in the range of > 0.600 wt.% to < 1.400 wt.%, for example in combination with > 98.600 wt.% to < 99.400 wt.% high molecular weight polyoxymethylene homopolymer, proved to be advantageous.A carbodiimide quantity in the range of > 0.700 wt% to < 1.300 wt%, for example as in Example Series 2 in combination with > 98.700 wt% to < 99.300 wt% high-molecular-weight polyoxymethylene homopolymer, proved to be particularly advantageous. The best results were achieved with a carbodiimide quantity of 1 wt%, especially in combination with 99.000 wt% high-molecular-weight polyoxymethylene homopolymer. It can therefore be advantageous to add a carbodiimide in Example Series 1 and thereby, for example, reduce the wt% of the high-molecular-weight polyoxymethylene by the wt% of the carbodiimide.

[0190] Therefore, in a sample series 1a, molding compounds were produced from > 83,000 wt% to < 98,900 wt% high-molecular-weight polyoxymethylene, > 1,000 wt% to < 15,000 wt% low-molecular-weight polyoxymethylene, and > 0.100 wt% to < 2,000 wt% carbodiimide. It was found that a combination of > 1,000 wt% to < 12,000 wt%, in particular > 1,000 wt% to < 10,000 wt%, for example 5 wt%, low-molecular-weight polyoxymethylene and > 0.600 wt% to < 1,400 wt%, for example of > R. 416435

[0191] - 35 -

[0192] 0.700 wt.% to < 1.300 wt.%, for example of 1 wt.%, carbodiimide and > 86.600 wt.% to < 98.400 wt.%, in particular > 88.700 wt.% to < 98.300 wt.%, for example 94.000 wt.%, high molecular weight polyoxymethylene was advantageous.

[0193] Table 2 further shows that in example series 3, by adding a combination of a carbodiimide and a fatty acid ester, for example a carbodiimide quantity in the range of > 0.100 wt.% to < 2.000 wt.% and a fatty acid ester quantity in the range of > 0.100 wt.% to < 0.150 wt.%, for example as in example series 3 in combination with > 97.850 wt.% to < 99.800 wt.% high molecular weight polyoxymethylene homopolymer, compared to unmodified high molecular weight polyoxymethylene, the injection pressure and the mold cavity pressure and thus the processability are (further) improved, as well as the spherulite size, the modulus of elasticity and the heat deflection temperature and thus the mechanical properties and the performance of a molded part and / or component formed therefrom, and overall excellent results can be achieved. A carbodiimide quantity in the range of > 0.600 wt.% to < 1.400 wt.%.-%, in particular from > 0.700 wt.% to < 1.300 wt.%, for example from 1 wt.%, and a fatty acid ester quantity in a range of > 0.100 wt.% to < 0.150 wt.%, in particular from > 0.110 wt.% to < 0.140 wt.%, for example from 0.125 wt.%, for example as in example series 3 in combination with > 98.450 wt.% to < 99.300 wt.% or > 98.560 wt.% to < 99.190 wt.% or 98.875 wt.% high molecular weight polyoxymethylene homopolymer, proved to be particularly advantageous. It may therefore be advantageous to add a carbodiimide and a fatty acid ester to example series 1, thereby reducing, for example, the weight percentage of high molecular weight polyoxymethylene by the weight percentage of the carbodiimide and the fatty acid ester.

[0194] Therefore, as part of an example series 1b, molding compounds were also produced from > 82.850 wt.% to < 98.800 wt.% high molecular weight polyoxymethylene, > 1.000 wt.% to < 15.000 wt.% low molecular weight polyoxymethylene, > 0.100 wt.% to < 2.000 wt.% carbodiimide and > 0.100 wt.% to < 0.150 wt.% R. 416435

[0195] - 36 -

[0196] Fatty acid esters are produced. It was shown that a combination of > 1.000 wt% to < 12.000 wt%, in particular > 1.000 wt% to < 10.000 wt%, for example 5 wt%, low molecular weight polyoxymethylene, > 0.600 wt% to < 1.400 wt%, for example > 0.700 wt% to < 1.300 wt%, for example 1 wt%, carbodiimide, > 0.100 wt% to < 0.150 wt%, for example > 0.110 wt% to < 0.140 wt%, for example 0.125 wt%, fatty acid esters and > 86.450 wt% to < 98.300 wt%, in particular > 88.560 wt% to < 98.190 wt%, for example 93.875 wt%, high molecular weight Polyoxymethylene was advantageous.

[0197] Table 2 further shows that in example series 4, by adding only one fatty acid ester, for example in a fatty acid ester quantity in the range of > 0.100 wt.% to < 0.150 wt.%, for example as in example series 4 in combination with > 99.850 wt.% to < 99.900 wt.% high molecular weight polyoxymethylene homopolymer - compared with unmodified high molecular weight polyoxymethylene - the injection pressure and the mold cavity pressure and thus the processability are improved, as well as the spherulite size, the modulus of elasticity and the heat deflection temperature and thus the mechanical properties and the performance of a molded part and / or component formed therefrom, and overall satisfactory to good results, but not excellent results as with the combination of carbodiimide and fatty acid ester according to example series 3, could be achieved.The excellent result of example series 3 therefore appears to be based on a synergistic effect of the combination. It may therefore be advantageous to use carbodiimide in combination with a fatty acid ester.

[0198] Surprisingly, in example series 4, a fatty acid ester quantity in the range of > 0.100 wt.% to < 0.150 wt.%, particularly from > 0.110 wt.% to < 0.140 wt.%, resulted in an improved, and in particular increased, modulus of elasticity of the molding compound and the molded part and / or component compared to a fatty acid ester quantity of 0.100 wt.% and also compared to a fatty acid ester quantity of 0.150 wt.%, and thus also improved performance of the molding compound. In the range of > 0.100 wt.% to < 0.150 wt.%, particularly from > 0.110 wt.% to < 0.140 wt.%, R. 416435

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[0200] Surprisingly, a maximum modulus of elasticity is found in the range of wt.% to < 0.140 wt.%, which makes it possible to further improve the mechanical properties and performance of a molded part and / or component made from it. It can therefore be particularly advantageous to use a fatty acid ester quantity in the range of > 0.100 wt.% to < 0.150 wt.%, for example, > 0.110 wt.% to < 0.140 wt.%, for example, 0.125 wt.%, as in example series 4, in combination with > 99.850 wt.% to < 99.900 wt.%, especially with > 99.860 wt.% to < 99.890 wt.%, for example, with 99.875 wt.%, of high-molecular-weight polyoxymethylene homopolymer. It may therefore be advantageous to add a fatty acid ester to example series 1 and thereby, for example, reduce the weight percentage of high molecular weight polyoxymethylene by the weight percentage of the fatty acid ester.

[0201] As part of an example series 1 c, molding compounds were therefore also produced from > 84.850 wt.% to < 98.900 wt.% high molecular weight polyoxymethylene, > 1.000 wt.% to < 15.000 wt.% low molecular weight polyoxymethylene and > 0.100 wt.% to < 0.150 wt.% fatty acid esters. It was found that a combination of > 1.000 wt.% to < 12.000 wt.%, in particular > 1.000 wt.% to < 10.000 wt.%, for example 5 wt.%, low molecular weight polyoxymethylene, > 0.100 wt.% to < 0.150 wt.%, for example > 0.110 wt.% to < 0.140 wt.%, for example 0.125 wt.%, fatty acid esters and > 87.850 wt.% to < 98.900 wt.%, in particular > 89.860 wt.% to < 98.890 wt.%, for example 94.875 wt.%, high molecular weight polyoxymethylene was also advantageous.

[0202] Table 2 further shows that in example series 5, the addition of calcium stearate, for example in an amount in the range of > 0.400 wt.% to < 0.600 wt.%, for example as in example series 5 in combination with > 99.400 wt.% to < 99.600 wt.% high molecular weight polyoxymethylene homopolymer, improves the injection pressure and the mold cavity pressure and thus the processability, as well as the spherulite size, the modulus of elasticity and the heat deflection temperature and thus the mechanical properties and the performance of a molded part produced therefrom. R. 416435

[0203] - 38 - and / or component can be improved somewhat, and overall satisfactory results can be achieved. A calcium stearate quantity in the range of > 0.500 wt.% to < 0.600 wt.%, for example, as in Example Series 5 in combination with > 99.400 wt.% to < 99.500 wt.% high-molecular-weight polyoxymethylene homopolymer, proved advantageous. It may therefore be advantageous, if necessary, to add at least one metal salt of a fatty acid, for example, calcium stearate, in Example Series 1, thereby reducing, for example, the wt. percent of the high-molecular-weight polyoxymethylene by the wt. percent of the metal salt of a fatty acid, for example, calcium stearate. For example, a molding compound can consist of > 1,000 wt.% to < 15,000 wt.%, in particular > 1,000 wt.% to < 12,000 wt.%, in particular > 1,000 wt.% to < 10,000 wt.%, for example 5 wt.%, low molecular weight polyoxymethylene and > 0.100 wt.% to < 0.600 wt.%.-%, in particular > 0.400 wt.% to < 0.600 wt.%, for example > 0.500 wt.% to < 0.600 wt.%, for example 0.500 wt.%, of at least one metal salt of a fatty acid, for example calcium stearate, - and optionally > 0.100 wt.% to < 0.150 wt.%, in particular > 0.100 wt.% to < 0.150 wt.%, for example from > 0.110 wt.% to < 0.140 wt.%, for example from 0.125 wt.%, fatty acid esters and / or > 0.100 wt.% to < 2.000 wt.%, in particular > 0.600 wt.% to < 1.400 wt.%, for example from > 0.700 wt.% to < 1.300 wt.%, for example from 1 wt.%, carbodiimide - are formed, for example wherein > 82.250 wt.% to < 98.700 wt.%, in particular > 85.850 wt.% to <.

[0204] 97.900 wt.%, for example from > 87.960 wt.% to < 97.690 wt.%, for example 93.375 wt.%, or > 82.400 wt.% to < 98.800 wt.%, in particular > 86.000 wt.% to < 98.000 wt.%, for example from > 88.100 wt.% to < 97.800 wt.%, for example 93.500 wt.%, or > 84.250 wt.% to < 98.800 wt.%, in particular > 87.250 wt.% to < 98.500 wt.%, for example from > 89.260 wt.% to < 98.390 wt.%, for example 94.375 wt.%, or > 84.400 wt.% to <

[0205] 98,900 wt.%, in particular and > 87,400 wt.% to < 98,600 wt.%, for example from > 89,400 wt.% to < 98,500 wt.%, for example 94,500 wt.%, high molecular weight polyoxymethylene can be used.

Claims

R. 416435 - 39 - Claims 1. Molding compound containing - at least one high molecular weight polyoxymethylene with an average molecular weight greater than or equal to 350,000 g / mol and - at least one low molecular weight polyoxymethylene with an average molecular weight of less than or equal to 150,000 g / mol.

2. Molding compound according to claim 1, wherein the at least one high molecular weight polyoxymethylene has an average molecular weight in the range of > 350,000 g / mol to < 500,000 g / mol, in particular in the range of > 400,000 g / mol to < 500,000 g / mol, for example in the range of > 410,000 g / mol to < 460,000 g / mol, and / or wherein the at least one low molecular weight polyoxymethylene has an average molecular weight in the range of > 50,000 g / mol to < 150,000 g / mol.

3. Molding compound according to claim 1 or 2, wherein the molding compound, based on the total weight of the molding compound, contains > 1.000 wt.% to < 15.000 wt.%, in particular > 1.000 wt.% to < 12.000 wt.%, in particular > 1.000 wt.% to < 10.000 wt.%, in particular > 1.500 wt.% to < 7.500 wt.%, of which at least one low molecular weight polyoxymethylene is present.

4. Molding compound according to any one of claims 1 to 3, wherein the molding compound further contains at least one carbodiimide.

5. Molding compound according to claim 4, R. 416435 - 40 - wherein the at least one carbodiimide is a polymeric carbodiimide, and / or wherein the at least one carbodiimide has an average molecular weight in the range of > 5,000 g / mol to < 50,000 g / mol, in particular of > 15,000 g / mol to < 35,000 g / mol.

6. Molding compound according to claim 5, wherein the molding compound, based on the total weight of the molding compound, contains > 0.100 wt.% to < 2.000 wt.%, in particular > 0.100 wt.% to < 1.850 wt.%, in particular > 0.600 wt.% to < 1.350 wt.%, at least one carbodiimide.

7. Molding compound according to any one of claims 1 to 6, wherein the molding compound further comprises at least one fatty acid ester, in particular wherein the at least one fatty acid ester has an average molecular weight of < 2,000 g / mol, in particular of < 1,250 g / mol, and / or wherein the at least one fatty acid ester is an ester of a fatty acid having 10 to 22 carbon atoms, in particular having 10 to 18 carbon atoms, in particular having > 16 to < 18 carbon atoms, with a polyhydric aliphatic saturated alcohol having 2 to 6 carbon atoms, and / or wherein the polyhydric aliphatic saturated alcohol is at least trihydric and / or has > 3 to < 6 carbon atoms, in particular > 3 to < 5 carbon atoms, in particular 5 carbon atoms, in particular wherein the polyhydric aliphatic alcohol is at least tetrahydric.

8. Molding compound according to claim 7, wherein the molding compound, based on the total weight of the molding compound, contains > 0.100 wt.% to < 0.150 wt.%, in particular > 0.105 wt.% to < 0.145 wt.%, of at least one fatty acid ester.

9. Molding compound according to any one of claims 1 to 8, wherein the molding compound further comprises at least one metal salt of a fatty acid, in particular R. 416435 - 41 - Calcium stearate, in particular wherein the molding compound, based on the total weight of the molding compound, contains > 0.400 wt.% to < 0.600 wt.%, in particular > 0.500 wt.% to < 0.600 wt.%, of which at least one metal salt of a fatty acid, in particular calcium stearate, is present.

10. Molding compound according to any one of claims 1 to 9, wherein the molding compound contains, based on the total weight of the molding compound, > 0.100 wt.% to < 3.000 wt.%, in particular > 0.100 wt.% to < 2.000 wt.%, in total additives.

11. Molding compound according to any one of claims 1 to 10, wherein the at least one high molecular weight polyoxymethylene is a polyoxymethylene homo- or copolymer, in particular wherein the at least one high molecular weight polyoxymethylene is a polyoxymethylene homopolymer, and / or wherein the at least one low molecular weight polyoxymethylene is a polyoxymethylene homo- or copolymer, in particular wherein the at least one low molecular weight polyoxymethylene is a polyoxymethylene homopolymer.

12. Molding compound according to any one of claims 1 to 11, wherein the molding compound, based on the total weight of the molding compound, contains > 82.000 wt.%, in particular > 87.000 wt.%, in particular > 88.000 wt.%, in particular > 88.000 wt.%, of which at least one high molecular weight polyoxymethylene is present, and / or wherein the molding compound, based on the total weight of the molding compound, contains > 97.000 wt.%, in particular > 98.000 wt.%, in particular > 98.000 wt.%, for example > 99.000 wt.%, of which at least one high molecular weight polyoxymethylene and at least one low molecular weight polyoxymethylene in total.

13. Molding compound according to one of claims 1 to 12, - wherein the molding compound, based on the total weight of the molding compound, is > 97.000 wt.%, in particular > 99.000 wt.%, and / or up to < 100.000 wt.%, optionally < 99.900 wt.%, R. 416435 - 42 - in particular 100,000 wt.%, in which at least one high molecular weight polyoxymethylene and at least one low molecular weight polyoxymethylene in total and / or > 85,000 wt.%, in particular > 90,000 wt.%, in particular > 92,000 wt.%, for example > 92,500, and / or up to < 99,000 wt.%, in particular < 98,500 wt.%, in which at least one high molecular weight polyoxymethylene is present, in particular wherein the molding compound contains the at least one high molecular weight polyoxymethylene and the at least one low molecular weight polyoxymethylene, or - wherein the molding compound, based on the total weight of the molding compound, contains > 98.000 wt.% and / or up to < 99.900 wt.% of the at least one high molecular weight polyoxymethylene and the at least one low molecular weight polyoxymethylene in total and / or > 83.000 wt.%, in particular > 88.000 wt.%, in particular > 90.000 wt.%, in particular > 90.500 wt.%, and / or (up to) < 98.900 wt.%, in particular < 98.400 wt.%, of the at least one high molecular weight polyoxymethylene, in particular wherein the molding compound contains the at least one high molecular weight polyoxymethylene and the at least one low molecular weight polyoxymethylene and the at least one carbodiimide, or - wherein the molding compound contains, based on the total weight of the molding compound, > 97.850 wt.%, up to < 99.800 wt.%, at least one high molecular weight polyoxymethylene and at least one low molecular weight polyoxymethylene in total and / or > 82.850 wt.%, in particular > 87.850 wt.%, for example > 89.850 wt.%, for example > 90.350 wt.%, and / or up to < 98.800 wt.%, in particular < 98.300 wt.%, at least one high molecular weight polyoxymethylene, in particular wherein the molding compound contains the at least one high molecular weight polyoxymethylene and the at least one low molecular weight polyoxymethylene and the at least one carbodiimide and the at least one fatty acid ester, or - wherein the molding compound, based on the total weight of the molding compound, is > 99.850 wt.%, in particular > 99.855 wt.%, R. 416435 - 43 - in particular > 99.860 wt.%, in particular > 99.865 wt.%, up to < 99.900 wt.%, in particular < 99.895 wt.%, in particular < 98.890 wt.%, in particular < 98.885 wt.% of the at least one high molecular weight polyoxymethylene and of the at least one low molecular weight polyoxymethylene in total and / or > 84.850 wt.%, in particular > 89.850 wt.%, for example > 89.855 wt.% or > 89.860 wt.% or > 89.865 wt.%, for example > 91.850 wt.%, for example > 92.350 wt.%, and / or up to < 98.900 wt.%, in particular < 98.895 wt.% or < 98.890 wt.% or < 98.885 wt.%, for example < 98.400 wt%, of which at least one high molecular weight polyoxymethylene is present, in particular wherein the molding compound contains the at least one high molecular weight polyoxymethylene and the at least one low molecular weight polyoxymethylene and the at least one fatty acid ester.

14. Molded part and / or component formed from a molding compound according to one of claims 1 to 13, in particular wherein the molded part and / or component is a gear or a bearing part, in particular a sliding bearing bushing or a sliding element, or a guide or a rail or a slide or a carriage or a roller or an actuator element or a zipper part.

15. Device comprising a molded part and / or component according to claim 14, in particular wherein the device is an actuator and / or a brake or a steering or a transmission or a motor or a bearing or a guide or a sliding device or a zipper.

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