Translucent multilayer body with a temperature- or pressure-sensitive decorative layer

Abstract

The present invention relates to a multi-layer body comprising (I) a support layer made of a special thermoplastic polycarbonate molding compound and (II) a layer made of a material selected from the group consisting of stone products, leather products, textiles containing synthetic fibers, materials of plant origin or materials containing components of plant origin, or laminates containing one or more of the above-mentioned materials, where the layer (II) has a specified minimum transmittance or has at least one recess in the form of at least one symbol, pattern, hole, line or sign, or the layer has a dot-like recess. The present invention also relates to a lighting unit comprising the multi-layer body and a light source, a method for producing the multi-layer body, and the use of the special thermoplastic polycarbonate molding compound as a support layer of such a multi-layer body.

Description

[Technical field]

[0001] The present invention relates to a multi-layer article comprising a support layer made of a thermoplastic polycarbonate molding compound and a temperature- or pressure-sensitive decorative layer, to a lighting or display unit comprising the multi-layer article and a light source, to a method for producing the multi-layer article, and to the use of a thermoplastic polycarbonate molding compound as a support layer in such a multi-layer article. [Background technology]

[0002] Decorative ambient lighting elements or backlit functional / display elements are increasingly used in automotive interior and body applications. The market trend is to switch on / fade in the lighting or functional display only when needed, e.g. to make such elements look different during the day and at night, or to use such ambient dynamic lighting to enhance the perception of space in automotive interiors or to enable the display of situation-appropriate information based on demand.

[0003] These lighting or functional elements are, for example, fully or partially transilluminable decorative strips, decorative panels, trim panels, steering wheel covers, consoles, steering wheels or instrument panel carriers, or control elements which may be used to operate various functions of the vehicle, such as start / stop buttons and control elements for the lighting or environmental control of the vehicle, or display elements which may be used to display information as required.

[0004] Such components or components are generally manufactured from engineered thermoplastics because they allow high individuality and functional integration of the components in molding processes, particularly injection molding, that are simple and cost-effective to implement on an industrially large scale.

[0005] For such components with decorative functions, it is often desirable to provide the visible surface with a decorative layer in order to adapt its optical, haptic and / or resistance to environmental influences, for example the light-, UV- or heat-, chemical- or scratch-resistance of the surface appearance to the technical requirement profile of such components or to customer demands for a high-quality and differentiated component appearance. This can be achieved, for example, in an in-mold decoration process (IMD), preferably in injection molding, where a decorative layer is introduced into an injection mold and subsequently subjected to a film insert molding with a thermoplastic molding compound. In this context, especially in the field of luxury cars, there is a great demand, in particular for surfaces with the appearance of natural materials (for example wood, stone or leather) or fabrics. Such components can be produced by using layers of stone, animal leather products, textiles containing or consisting of synthetic fibers, materials of plant origin or materials containing components of plant origin, for example wood, cork, silk, fabrics containing natural fibers or paper, or laminates containing one or more of the listed materials in the IMD process.

[0006] If these layers are thin enough, they can be transilluminated by light in the visible wavelength range (380 nm to 780 nm) and have a good light yield from light sources, e.g. LEDs. If the support layer made of a thermoplastic molding compound also has a sufficient light transmission in the visible wavelength range, the multilayer component can show a differentiated day / night surface appearance. In the day mode, these components have the appearance of a decorative layer, i.e., for example, a natural material or fabric. In the night mode, the components transilluminated by the light source can be used as diffuse lighting elements to achieve excellent ambient lighting scenarios. If the back side of the decorative layer is partially coated with a layer that is not transparent to light and / or if the decorative layer itself is opaque to light but is provided in partial areas with breakthroughs, for example in the form of shapes, lines, letters or symbols, such components further allow the display of patterns or information or selective illumination of certain functional elements / functional areas in the multilayer component, if required.

[0007] However, such decorative layers made from the abovementioned materials are often sensitive to heat, i.e. temperature, and / or pressure, especially if they are made thin enough to be transilluminable. Thus, when high temperatures or pressures are used in the IMD process in the manufacture of multilayer components, high scrap rates of the components are often caused by heat-burning of the decorative layer, which is manifested, for example, in the form of discoloration, at least on the side of the multilayer article manufactured in the IMD process facing the thermoplastic, during transillumination of said article, especially in the region of the gate site. Alternatively, scrap is formed by deformation of the decorative layer, for example localized peeling, deformation of the decorative layer, such as air bubbles / orange peel-like curling, and / or mechanical damage of the decorative layer, which leads, especially in the case of brittle materials, such as stone, to cracking, spalling, or in the worst case to complete destruction (laceration, rupture, shattering) of the decorative layer.

[0008] Multi-layer components with temperature- or pressure-sensitive decorative layers and methods for producing these are known in principle.

[0009] Patent document 1 discloses a method for producing decorative and / or trim parts for vehicle interiors having optically high quality decoration and attractive haptics in the form of molded parts, in particular molded parts, which include a veneer as a decorative layer and a support. The method according to the invention comprises film insert molding a veneer prepared for forming the decorative layer with a support material, in particular a plastic for forming the support, preferably ABS (acrylonitrile-butadiene-styrene copolymer) plastic.

[0010] US Patent No. 5,399,633 discloses a multi-layered plastic composite component, used in particular as a decorative appliqué or decorative panel in the automotive sector, and a method for its production which comprises subjecting a decorative layer, for example of plywood, laminate, fabric or paper substrate, to film insert molding, preferably at low pressure.

[0011] US Patent No. 5,399,633 discloses a display unit, particularly for vehicles, which has a display front provided with characters including transparent areas and substantially light-opaque areas surrounded by the transparent areas, with a light source arranged behind the display front for illumination by transillumination, the substantially transparent areas being formed by breakthroughs in the display front and the substantially light-opaque areas being arranged on a transparent support, the display front being manufactured from a light-opaque material, for example a wood material, a fabric, a veneer or a thin film.

[0012] Patent Document 4 discloses a plywood-covered plastic molded article comprising a body made of fiber-reinforced plastic and a plywood forming or covering at least a surface region of the plastic molded article, and a method for producing such a plastic molded article, in which the body made of fiber-reinforced plastic is heated to a temperature preferably 10°C to 50°C higher than the melting point or glass transition temperature of the plastic matrix of the body, thereby thermally bonding at least a region of the body to the plywood.

[0013] Patent document 5 discloses a method for producing a component comprising a surface decoration, the surface decoration comprising a stone decoration on a support component made of plastic, the stone decoration being subjected to film insert injection molding, film insert compression or film insert blow molding with plastic materials such as acrylonitrile-butadiene-styrene terpolymer (ABS), polycarbonate (PC), blends of polycarbonate and acrylonitrile-butadiene-styrene terpolymer (PC / ABS), polymethyl methacrylate (PMMA), polystyrene (PS) or polyurethane (PUR). In a preferred development of the invention, at least in the area of ​​the stone decoration, a part transparent to light is provided.

[0014] Patent document 6 discloses a method for producing a trim piece in which a thin decorative layer is applied to a support element by means of an adhesive, the thin decorative layer being made of organic and / or crystalline materials which are prone to spalling, especially in thin layers of natural stone.

[0015] Patent Document 7 discloses an LED lighting unit comprising a multilayer article and an LED light source, the multilayer article being composed of the following layers in the following order: a1) a support layer made of a thermoplastic composition, a2) a natural stone layer, a3) a transparent layer made of a thermoplastic composition. Suitable thermoplastic compositions for forming layers a1) and / or a3) include polycarbonate-based compositions.

[0016] Patent Document 8 discloses a method for producing a composite molded part, in which a soft upper material, in particular a decorative material such as fabric, leather, film, etc., is subjected to film insert molding with a plastic at very low pressure in a cavity formed between a cavity mold plate and a mold core. During film insert molding, care must be taken not to damage the upper material, which is often sensitive.

[0017] For an attractive visual impression of the multilayer article in a transilluminated state, it is also desired that the plastic main support at least to some extent scatters the light from the point light source, e.g. LED, thus achieving a diffuse lighting appearance of the transilluminated component. Otherwise, the light source would be visible to the observer and / or the desired visual effect when the light source is turned on would be limited to only a small area of ​​the multilayer article. In some cases, gate marks for the injection molding process are unavoidably located in the visible area of ​​the multilayer article, on the side opposite the visible side of the multilayer article of the plastic main support provided with the decorative layer, especially in the case of thin-walled, large surface area and / or geometrically complex components. Insufficient light diffusion of the plastic support has the undesirable consequence that these gate marks become visible when the visible side of the multilayer article is transilluminated, adversely affecting the high-quality appearance of the illuminating body. To achieve such a desirable diffuse light impression of the surface of a multilayer article transilluminated by a point light source, it is necessary that the support layer has, on the one hand, the highest possible transmittance of the incident visible light, and, on the other hand, the light diffusivity, i.e., the highest possible half-value angle, associated with the highest possible scattering of the light cone caused by the passage of the point light source through the support layer. The higher this half-value angle, the more spatially uniform the perceived illuminance of the light emitted by the point light source after passing through the support layer, and the less likely it is that gate marks or other visual defects caused in the injection molding process on the side opposite to the visible side of the plastic main support will be visible and that the visible side of the transilluminated multilayer article will be adversely affected during transillumination. Also, the higher the light diffusion half-value angle of the support layer, the larger the surface can be transilluminated by the point light source with a spatially approximately uniform light intensity. The transmittance and light diffusivity (half-value angle) of a material cannot generally be adjusted independently of each other, but generally go in opposite directions to each other. Modifying a material, for example optimizing the light diffusivity by changing its composition, generally leads to a decrease in the transmittance. In particular, both variables also depend on the layer thickness of the material to be transilluminated, where as the layer thickness increases, the transmittance of the semi-transparent material decreases and the light diffusion increases.

[0018] Such components / components for automotive interior and exterior applications also require further performances such as, for example, high material ductility, high heat distortion resistance and dimensional stability, especially at low temperatures. Thermoplastics suitable for such applications and therefore established in such fields of use, such as polycarbonate, acrylonitrile-butadiene-styrene terpolymer (ABS) and blends of these two thermoplastics, all have excessively high melt viscosities and therefore require high melt temperatures and / or high injection pressures for the injection molding process, especially in the production of complex, large surface and / or thin support layers. This leads to the problems mentioned above when using temperature- and / or pressure-sensitive decorative layers (high scrap rates in the production process). Alternatively, the thermoplastics have insufficient mechanical properties and / or light diffusion. This applies especially to transparent polycarbonates or polycarbonate compounds with scattering additives. However, the ABS plastics, ABS / PC blends or PC / ABS blends used in the prior art for such applications have a lower melt viscosity than polycarbonate and therefore can in principle be used for injection molding at lower melt temperatures and injection pressures, and generally have high light diffusion and furthermore exhibit poor light transmission, i.e. their use in the manufacture of multi-layer components leads to poor light yield on the visible side of the component when backlit.

[0019] It was therefore desirable to produce a multi-layer article that can be diffusely transilluminated with improved light yield and has an improved aesthetic appearance in the non-transilluminated and / or transilluminated state, comprising a main support made of a thermoplastic processable material and a temperature- and / or pressure-sensitive decorative layer selected from the group consisting of stone products, animal leather products, textiles containing synthetic fibers, materials of plant origin or containing components of plant origin, or laminates containing one or more of the listed materials. The thermoplastic processable material must meet the general performance requirements required by the automotive industry for materials for producing components used in interior and exterior applications, be processable in the IMD process at low melt temperatures and injection pressures, improving the quality of the multi-layer article and / or reducing the scrap rate in the production process. It was further desirable to provide a method for producing such a multi-layer article, in which the decorative layer is applied by the IMD process to a support made of a thermoplastic molding compound.

[0020] For this purpose, the support material had to exhibit a combination of improved light transmission and high light diffusion in the visible wavelength range (i.e. high half-value angle) as well as good thermoplastic processing properties (i.e. low melt viscosity / high melt flowability), high material toughness especially even at low temperatures, and high thermal distortion resistance. [Prior art documents] [Patent documents]

[0021] [Patent Document 1] German Patent Invention No. 102018127648 [Patent Document 2] European Patent Application Publication No. 2301736 [Patent Document 3] German Patent Application Publication No. 19910241 [Patent Document 4] International Publication No. 2017009152 [Patent Document 5] German Patent Application Publication No. 102008028608 [Patent Document 6] German Patent Invention No. 19909869 [Patent Document 7] International Publication No. 2021063718 [Patent Document 8] European Patent No. 1144177 Summary of the Invention

[0022] Surprisingly, the above objectives are (I) a support layer composed of a thermoplastic molding compound containing the following A), B), and C); (II) a layer of a material selected from the group consisting of stone products, animal leather products, textiles containing synthetic fibers, materials of plant origin or materials containing plant-derived components, or laminates containing one or more of the materials listed; A multi-layer article comprising: A) at least one representative selected from the group consisting of aromatic polycarbonates and aromatic polyester carbonates; B) a rubber-modified vinyl (co)polymer consisting of the following B.1) and B.2): C) optionally at least one further component selected from polymer additives and blending partner polymers, B.1) 80% to 95% by weight of structural units derived from at least one vinyl monomer, based on the rubber-modified vinyl (co)polymer B; and B.2) 5% to 20% by weight, based on the rubber-modified vinyl (co)polymer B, of one or more elastomeric graft substrates having a glass transition temperature below -50°C and containing at least 50% by weight, based on B.2, of structural units derived from 1,3-butadiene; Here, the rubber-modified vinyl (co)polymer B is (i) a dispersed phase consisting of (i.1) and (i.2) below; (ii) a rubber-free vinyl (co)polymer matrix consisting of structural units of B.1 that are not bonded to and trapped in rubber particles; Including, (i.1) rubber particles grafted with a vinyl (co)polymer composed of structural units of B.1, and (i.2) vinyl (co)polymers also composed of structural units of B.1 entrapped in rubber particles as a separate dispersed phase, wherein the dispersed phase of (i) has a median diameter D50 of 0.7 μm to 2.0 μm as measured by ultracentrifugation; The thermoplastic molding compound contains less than 2% by weight of a rubber-based graft polymer different from component B), and The thermoplastic molding compound has a rubber content of at least 1.5% by weight; wherein the layer (II) has, at least in partial regions of its actual local thickness, a transmittance at at least one wavelength in the wavelength range of the spectrum from 380 nm to 780 nm of at least 25%, preferably at least 40%, most preferably at least 50%, wherein the transmittance is determined from a transmission spectrum measured according to the standard in DIN / ISO 13468-2 (2006 edition) or Or, It has been found that this is achieved by a multilayer article, in which layer (II) has a transmittance of less than 25% in the entire wavelength range of the spectrum from 380 nm to 780 nm, where the transmittance is determined from the transmission spectrum measured according to the standard in DIN / ISO 13468-2 (2006 edition), and layer (II) comprises at least one cutout in the form of at least one symbol, one pattern, one hole, one line or one letter, or comprises dot-like cutouts arranged in the form of at least one symbol, one pattern, one hole, one line or one letter.

[0023] If layer (II) has, at least in partial regions of its actual local thickness, a transmittance at at least one wavelength in the wavelength range of the spectrum from 380 nm to 780 nm of at least 25%, preferably at least 40%, most preferably at least 50%, where the transmittance is determined from a transmission spectrum measured according to the standard in DIN / ISO 13468-2 (2006 edition), the layer may optionally comprise at least one cut-out in the form of at least one symbol, a pattern, a hole, a line or a letter or may comprise dot-like cut-outs arranged in the form of at least one symbol, a pattern, a hole, a line or a letter. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0024] In a preferred embodiment, the thermoplastic molding compound of the support layer (I) is 30% to 85% by weight, more preferably 50% to 82% by weight, even more preferably 58% to 82% by weight, and most preferably 65% ​​to 75% by weight of component A; 14% to 69% by weight, more preferably 17% to 49% by weight, even more preferably 17% to 41% by weight, and most preferably 24% to 34% by weight of component B; 0.05% to 20% by weight, more preferably 0.1% to 10% by weight, even more preferably 0.2% to 5% by weight, and most preferably 0.3% to 2% by weight of component C; Includes.

[0025] In a preferred embodiment, the molding compound of the support layer (I) comprises less than 1% by weight, more preferably less than 0.5% by weight, even more preferably less than 0.2% by weight of a rubber-based graft polymer different from component B).The molding compound most preferably does not comprise a rubber-based graft polymer different from component B).

[0026] In a preferred embodiment, the molding compound of the support layer (I) has a rubber content in the range of 1.5% to 6% by weight, more preferably in the range of 1.8% to 5% by weight, even more preferably in the range of 1.9% to 4.1% by weight, and most preferably in the range of 2.5% to 3.5% by weight.

[0027] The above preferred ranges of components A and B and C can be combined with each other as desired.

[0028] In a preferred embodiment, the support layer (I) consists to the extent of at least 80% by weight, more preferably at least 95% by weight, even more preferably at least 99% by weight, and most preferably 100% by weight, of a thermoplastic molding compound consisting of components A, B, and C.

[0029] In the context of the present invention, the support layer (I) is also called the plastic support or support.

[0030] The multilayer article is suitable for transillumination with visible light (380 nm to 780 nm) using a light source, i.e. the multilayer article is transilluminable. The light source is arranged such that light first enters the support material (I) and exits through layer (II) or through a cutout introduced in layer (II), in particular whenever layer (II) is a layer that is opaque or poorly transmissive to visible light. The light source is preferably an LED light source.

[0031] Transilluminatable is to be understood to mean that switching on the light source changes the visual impression of the side opposite the light source, i.e. the visible side of the component or element in the installed state.

[0032] In a preferred embodiment, the multilayer article has, at least in partial regions of its actual local thickness, a transmittance at at least one wavelength in the wavelength range of the spectrum from 380 nm to 780 nm of at least 10%, more preferably at least 25%, even more preferably at least 40%, most preferably at least 45%, where the transmittance is determined from a transmission spectrum measured according to the standard in DIN / ISO 13468-2 (2006 edition).

[0033] The present invention further provides the use of a molding compound as defined above as a support layer (I) in a multi-layer article as defined above.

[0034] The present invention further provides an illumination or display unit comprising the above multilayer article and a light source emitting light having at least one wavelength in the wavelength range of the spectrum from 380 nm to 780 nm, the light source being positioned such that the support layer (I) of the multilayer article is transilluminated by the light emitted by the light source.

[0035] The present invention further provides a method for making a transilluminatable multi-layer article, comprising the steps of: a) creating a layer of material selected from the group consisting of stone, animal hides, textiles containing synthetic fibers, materials of plant origin or containing plant-derived components, or a laminate comprising one or more of the listed materials; Furthermore, the layer has, at least in partial regions of its actual local thickness, a transmittance at least at one wavelength in the wavelength range of the spectrum from 380 nm to 780 nm of at least 25%, preferably at least 40%, most preferably at least 50%, where the transmittance is determined from a transmission spectrum measured according to the standard in DIN / ISO 13468-2 (2006 edition) or Or, the layer has a transmittance of less than 25% in the entire wavelength range of the spectrum from 380 nm to 780 nm, the transmittance being determined from the transmission spectrum measured according to the standard in DIN / ISO 13468-2 (2006 edition), and the layer (II) comprises at least one cut-out in the form of at least one symbol, one pattern, one hole, one line or one letter or comprises dot-like cut-outs arranged in the form of at least one symbol, one pattern, one hole, one line or one letter; b) optionally thermoforming the layer produced in step a); c) subjecting the layer to film insert molding with a thermoplastic molding compound as described above; The present invention provides a method comprising:

[0036] Composition of the support layer (I) Ingredient A The aromatic polycarbonates and / or aromatic polyestercarbonates of component A suitable according to the invention are known from the literature or can be prepared by methods known from the literature (for the preparation of aromatic polycarbonates, see, for example, Schnell, "Chemistry and Physics of Polycarbonates", Interscience Publishers, 1964, and also DE-A-1 495 626, DE-A-2 232 877, DE-A-2 703 376, DE-A-2 714 544, DE-A-3 000 610, DE-A-3 832 396; for the preparation of aromatic polyestercarbonates, see, for example, DE-A-3 007 934).

[0037] Aromatic polycarbonates are prepared, for example, by reacting diphenols with carbonyl halides, preferably phosgene and / or aromatic dicarbonyl dihalides, preferably dihalides of benzenedicarboxylic acids, by interfacial methods, optionally using chain terminators, such as monophenols, and optionally using trifunctional or higher branching agents, such as triphenols or tetraphenols. Preparation via melt polymerization methods by reacting diphenols with, for example, diphenyl carbonate is also possible.

[0038] The diphenols for the preparation of the aromatic polycarbonates and / or aromatic polyester carbonates preferably have the formula (I): [ka] (In the formula, A is a single bond, C 1 ~C 5 Alkylene, C 2 ~C 5 Alkylidene, C 5 ~C 6 Cycloalkylidene, -O-, -SO-, -CO-, -S-, -SO 2 -, optionally fused with further aromatic rings containing heteroatoms, C 6 ~C 12 Arylene, or a compound represented by formula (II) or (III): [ka] Based on B, in each case, C 1 ~C 12 alkyl, preferably methyl; halogen, preferably chlorine and / or bromine; x is, independently in each occurrence, 0, 1, or 2; p is 1 or 0, and R 5 and R 6 For each X 1 can be selected individually, each independently being hydrogen or C 1 ~C 6alkyl, preferably hydrogen, methyl or ethyl; X 1 is carbon, and m is an integer from 4 to 7, preferably 4 or 5, provided that at least one atom X 1 R on top 5 and R 6 is a diphenol of the formula (wherein both are alkyl).

[0039] Preferred diphenols are hydroquinone, resorcinol, dihydroxydiphenols, bis(hydroxyphenyl)-C 1 ~C 5 Alkane, bis(hydroxyphenyl)-C 5 ~C 6 Cycloalkanes, bis(hydroxyphenyl)ethers, bis(hydroxyphenyl)sulfoxides, bis(hydroxyphenyl)ketones, bis(hydroxyphenyl)sulfones, and α,α-bis(hydroxyphenyl)diisopropylbenzene, and also their ring brominated and / or ring chlorinated derivatives.

[0040] Particularly preferred diphenols are 4,4'-dihydroxybiphenyl, bisphenol A, 2,4-bis(4-hydroxyphenyl)-2-methylbutane, 1,1-bis(4-hydroxyphenyl)cyclohexane, 1,1-bis(4-hydroxyphenyl)-3,3,5-trimethylcyclohexane, 4,4'-dihydroxydiphenyl sulfide, 4,4'-dihydroxydiphenyl sulfone, and also their dibrominated and tetrabrominated or dichlorinated and tetrachlorinated derivatives, such as 2,2-bis(3-chloro-4-hydroxyphenyl)propane, 2,2-bis(3,5-dichloro-4-hydroxyphenyl)propane, or 2,2-bis(3,5-dibromo-4-hydroxyphenyl)propane. Particularly preferred is 2,2-bis(4-hydroxyphenyl)propane (bisphenol A).

[0041] The diphenols can be used individually or in the form of any desired mixtures. The diphenols are either known from the literature or can be obtained by methods known from the literature.

[0042] Examples of chain terminators suitable for the preparation of thermoplastic aromatic polycarbonates include phenol, p-chlorophenol, p-tert-butylphenol or 2,4,6-tribromophenol, but also long-chain alkylphenols, such as 4-[2-(2,4,4-trimethylpentyl)]phenol, 4-(1,3-tetramethylbutyl)phenol according to DE-A-2842005, and mono- or dialkylphenols having a total of 8 to 20 carbon atoms in the alkyl substituent, such as 3,5-di-tert-butylphenol, p-isooctylphenol, p-tert-octylphenol, p-dodecylphenol, as well as 2-(3,5-dimethylheptyl)phenol and 4-(3,5-dimethylheptyl)phenol. The amount of chain terminators used is generally between 0.5 mol% and 10 mol% relative to the total molar amount of diphenols used in each case.

[0043] The thermoplastic aromatic polycarbonates preferably have an average molecular weight (weight-average M) of 20 000 g / mol to 40 000 g / mol, more preferably 24 000 g / mol to 32 000 g / mol, particularly preferably 26 000 g / mol to 30 000 g / mol, measured by GPC (gel permeation chromatography) calibrated against bisphenol A polycarbonate standards with dichloromethane as eluent, calibration with linear polycarbonates of known molar mass distribution (prepared from bisphenol A and phosgene) from PSS Polymer Standards Service GmbH (Germany) and calibration according to method 2301-0257502-09D (German version of 2009) from Currenta GmbH & Co. OHG (Leverkusen). w). The eluent is dichloromethane. Column: combination of cross-linked styrene-divinylbenzene resin. Analytical column diameter: 7.5 mm; length: 300 mm. Column material particle size: 3 μm-20 μm. Solution concentration: 0.2 wt.%. Flow rate: 1.0 ml / min, solution temperature: 30°C. UV and / or RI detection is used.

[0044] The preferred ranges provide a particularly advantageous balance of mechanical and rheological properties in the compositions of the present invention.

[0045] The thermoplastic aromatic polycarbonates can be branched in a known manner, preferably by incorporating 0.05 mol % to 2.0 mol % of trifunctional or more than trifunctional compounds, for example compounds with three or more phenolic groups, relative to the total sum of the diphenols used. It is preferred to use linear polycarbonates, more preferably linear polycarbonates based on bisphenol A.

[0046] Both homopolycarbonates and copolycarbonates are suitable. The copolymers according to the invention of component A can also be prepared using polydiorganosiloxanes having 1% to 25% by weight, preferably 2.5% to 25% by weight, of hydroxyaryloxy end groups, based on the total amount of diphenols used. These are known (US Pat. No. 3,419,634) and can be prepared by methods known from the literature. Likewise suitable are polydiorganosiloxane-containing copolycarbonates, the preparation of which is described, for example, in DE-A-3334782.

[0047] The aromatic dicarbonyl dihalides for the preparation of aromatic polyester carbonates are preferably the diacyl dichlorides of isophthalic acid, terephthalic acid, diphenyl ether 4,4'-dicarboxylic acid, and naphthalene-2,6-dicarboxylic acid.

[0048] Mixtures of the diacyl dichlorides of isophthalic and terephthalic acid in ratios between 1:20 and 20:1 are particularly preferred.

[0049] In the preparation of polyester carbonates, carbonyl halides, preferably phosgene, are additionally used as difunctional acid derivatives.

[0050] In addition to the above-mentioned monophenols, the chain terminators useful for the production of aromatic polyester carbonates include their chlorocarbonates and acyl chlorides of aromatic monocarboxylic acids (C 1 ~C 22 alkyl or halogen atoms), and aliphatic C 2 ~C 22 Monocarbonyl chlorides are included.

[0051] The amount of chain terminator in each case is between 0.1 mol % and 10 mol % based on the moles of diphenol in the case of phenolic chain terminators and based on the moles of dicarbonyl dichloride in the case of monocarbonyl chloride chain terminators.

[0052] In preparing the aromatic polyester carbonates, it is also possible to use one or more aromatic hydroxycarboxylic acids.

[0053] The aromatic polyestercarbonates may be linear or branched in a known manner (see DE-A-2 940 024 and DE-A-3 007 934), whereby linear polyestercarbonates are preferred.

[0054] The branching agents used are, for example, trifunctional or polyfunctional carboxylic acid chlorides, such as trimesyl trichloride, cyanuric acid trichloride, 3,3',4,4'-benzophenonetetracarboxylic acid tetrachloride, 1,4,5,8-naphthalenetetracarboxylic acid tetrachloride or pyromellitic acid tetrachloride, in an amount of 0.01 mol % to 1.0 mol % (relative to the dicarboxylic acid dichloride used), or trifunctional or polyfunctional phenols, such as phloroglucinol, 4,6-dimethyl-2,4,6-tri(4-hydroxyphenyl)hept-2-ene ... The branching agents are 2,2-bis[4,4-bis(4-hydroxyphenyl)cyclohexyl]propane, 2,4-bis(4-hydroxyphenylisopropyl)phenol, tetra(4-hydroxyphenyl)methane, 2,6-bis(2-hydroxy-5-methylbenzyl)-4-methylphenol, 2-(4-hydroxyphenyl)-2-(2,4-dihydroxyphenyl)propane, tetra(4-[4-hydroxyphenylisopropyl]phenoxy)methane, and 1,4-bis[4,4'-dihydroxytriphenyl)methyl]benzene. Phenol-based branching agents can be initially charged with diphenols, and acid chloride branching agents can be introduced with acid dichlorides.

[0055] The proportion of carbonate structural units in the thermoplastic aromatic polyester carbonate can be varied as desired.The proportion of carbonate groups is preferably at most 100 mol%, particularly at most 80 mol%, more preferably at most 50 mol%, based on the total of ester groups and carbonate groups.Both the ester and carbonate moieties of the aromatic polyester carbonate can be present in the polycondensate in the form of blocks or in random distribution.

[0056] The thermoplastic aromatic polycarbonates and polyester carbonates may be used alone or in any desired mixtures.

[0057] As component A it is preferred to use linear polycarbonates based exclusively on bisphenol A.

[0058] Component B Component B is selected from the following rubber-modified vinyl (co)polymers B.1) and B.2), B.1) 80% to 95% by weight, preferably 83% to 93% by weight, more preferably 85% to 92% by weight, of structural units derived from at least one vinyl monomer, based on the rubber-modified vinyl (co)polymer B; and B.2) Rubber-modified vinyl (co)polymers B containing 5% to 20% by weight, preferably 7% to 17% by weight, more preferably 8% to 15% by weight, based on B.2, of structural units derived from 1,3-butadiene, preferably at least 50% by weight, preferably at least 70% by weight, particularly preferably 100% by weight, based on B.2, of structural units derived from 1,3-butadiene, and having a glass transition temperature T g one or more elastomeric graft substrates having Here, the rubber-modified vinyl (co)polymer B is (i) a dispersed phase consisting of (i.1) and (i.2) below; (ii) a rubber-free vinyl (co)polymer matrix consisting of structural units of B.1 that are not bonded to and trapped in rubber particles; Including, (i.1) rubber particles grafted with a vinyl (co)polymer composed of structural units of B.1, and (i.2) vinyl (co)polymers also composed of structural units of B.1 entrapped in rubber particles as a separate dispersed phase, And the dispersed phase of (i) has a median diameter D50, measured by ultracentrifugation, of 0.7 μm to 2.0 μm, preferably 0.7 μm to 1.5 μm, in particular 0.7 μm to 1.2 μm.

[0059] Unless otherwise expressly specified in the present invention, the glass transition temperature T g For all components, the T g is determined using the tangent method.

[0060] The rubber modified vinyl (co)polymers of component B preferably have a melt volume flow rate (MVR) of 2 ml / 10 min to 20 ml / 10 min, particularly preferably 3 ml / 10 min to 15 ml / 10 min, in particular 4 ml / 10 min to 8 ml / 10 min, measured at 220° C. and 10 kg piston load according to ISO 1133 (2012 edition). When a mixture of two or more rubber modified vinyl (co)polymers is used as component B, the preferred MVR range corresponds to the average of the MVRs of the individual components weighted by the mass fraction of the components in the mixture.

[0061] Such rubber-modified vinyl (co)polymers B are, for example, B.1 80% to 95% by weight, preferably 83% to 93% by weight, particularly preferably 85% to 92% by weight, of at least one vinyl monomer, based on the rubber-modified vinyl (co)polymer B, B.2 5% to 20% by weight, preferably 7% to 17% by weight, particularly preferably 8% to 15% by weight, based on the rubber-modified vinyl (co)polymer B, of one or more elastomeric graft substrates having a glass transition temperature of less than -50°C, preferably less than -60°C, particularly preferably less than -70°C, which contain structural units derived from 1,3-butadiene, based on B.2, at least 50% by weight, preferably at least 70% by weight, particularly preferably 100% by weight, The copolymer is preferably prepared by free radical polymerization in the presence of

[0062] The bulk polymerization reaction preferably used to prepare the rubber-modified vinyl (co)polymer B comprises both the polymerization of the vinyl monomers of B.1 and the grafting of the vinyl (co)polymer thus formed onto the elastomeric graft substrate of B.2. Furthermore, in this reaction mode, self-organization (phase separation) leads to the formation of a dispersed phase (i) consisting of (i.1) and (i.2): (i.1) rubber particles grafted with a vinyl (co)polymer composed of structural units of B.1, and (i.2) vinyl (co)polymers also composed of structural units of B.1 entrapped in rubber particles as a separate dispersed phase, Here, the rubber-containing phase (i) is in the form of a dispersion in a rubber-free vinyl (co)polymer matrix (ii) consisting of structural units of B.1 that are not bonded to and are not trapped in the rubber particles.

[0063] In contrast to the other vinyl (co)polymer proportions in component B, the rubber-free vinyl (co)polymer (ii) can be dissolved using a suitable solvent, such as, for example, acetone.

[0064] The size of the dispersed phase (i) in the rubber modified vinyl (co)polymer B thus prepared is adjusted via the conditions of the reaction regime, such as, for example, the temperature and the viscosity of the polymer obtained therefrom, and also the shear from stirring.

[0065] The median particle size D50 is the diameter above which 50% by weight of the particles lie and below which 50% by weight lie. Unless otherwise expressly stated in the present invention, this is determined for all components by ultracentrifuge measurements (W. Scholtan, H. Lange, Kolloid, Z. und Z. Polymere 250 (1972), 782-796).

[0066] The monomers B.1 are preferably B.1.1 60 to 85 parts by weight, particularly preferably 65 to 80 parts by weight, more preferably 70 to 78 parts by weight of styrene, in each case relative to the sum of B.1.1 and B.1.2, B.1.2. 15 to 40 parts by weight, particularly preferably 20 to 35 parts by weight, more preferably 22 to 30 parts by weight, of acrylonitrile, in each case relative to the sum of B.1.1 and B.1.2, and optionally B.1.3 0 to 10 parts by weight, preferably 0 to 7 parts by weight, more preferably 0 to 5 parts by weight, of methyl methacrylate or n-butyl acrylate, in each case relative to 100 parts by weight of the total of B.1.1 and B.1.2, It is a mixture consisting of:

[0067] In a further preferred embodiment, monomer B.1 is a mixture of 22 to 26 parts by weight of acrylonitrile and 74 to 78 parts by weight of styrene, optionally containing up to 10 parts by weight, particularly preferably up to 5 parts by weight, of n-butyl acrylate or methyl methacrylate, where the sum of the parts by weight of styrene and acrylonitrile is 100 parts by weight.

[0068] It is especially preferred if B.1 does not include B.1.3, and the above mentioned preferred ranges apply to B.1.1 and B.1.2.

[0069] Preferred graft substrates B.2 are butadiene-containing diene rubbers or mixtures of butadiene-containing diene rubbers or copolymers of butadiene-containing diene rubbers or mixtures thereof with further copolymerizable monomers (for example B.1.1 and B.1.2).

[0070] A particularly preferred graft substrate B.2 is a pure polybutadiene rubber. In a further preferred embodiment, B.2 is a styrene-butadiene block copolymer rubber.

[0071] Component B preferably has a polybutadiene content of from 5% to 18% by weight, more preferably from 7% to 15% by weight, especially from 8% to 13% by weight.

[0072] Particularly preferred rubber-modified vinyl (co)polymers of component B are the bulk-polymerized ABS polymers, as described, for example, in DE-A-2 035 390 (=U.S. Pat. No. 3,644,574) or DE-A-2 248 242 (=GB Pat. No. 1,409,275) or in Ullmanns Enzyklopaedie der Technischen Chemie [Ullmann's Encyclopedia of Industrial Chemistry], Vol. 19 (1980), p. 280 ff.

[0073] The vinyl (co)polymer (ii) which is not chemically bonded to the rubber substrate(s) B.2 and is not trapped in rubber particles can be formed as a result of its preparation in the polymerization of the graft polymer B, as described above. Likewise, a portion of this vinyl (co)polymer (ii) which is not chemically bonded to the rubber substrate(s) B.2 and is not trapped in rubber particles can be formed in the rubber-modified vinyl (co)polymer of component B as a result of its preparation in a bulk polymerization process, and another portion can be polymerized separately and added to component B as a constituent of component B. In component B, the proportion of the vinyl (co)polymer (ii), regardless of origin, measured as the acetone-soluble portion, is preferably at least 50% by weight, particularly preferably at least 60% by weight, more preferably at least 70% by weight, relative to component B.

[0074] In the rubber-modified vinyl (co)polymer of component B, the vinyl (co)polymer (ii) has a weight average molecular weight M of 70 kg / mol to 250 kg / mol, preferably 130 kg / mol to 200 kg / mol, in particular 150 kg / mol to 180 kg / mol. w has.

[0075] In the context of the present invention, the weight average molecular weight M of the vinyl (co)polymer (ii) in component B w is determined by gel permeation chromatography (GPC) in tetrahydrofuran against polystyrene standards.

[0076] Component B preferably does not contain alkali metals, alkaline earth metals, ammonium or phosphonium salts of saturated fatty acids having 8 to 22 carbon atoms, resin acids, alkylsulfonic acids and alkylarylsulfonic acids, and fatty alcohol sulfates.

[0077] Component B preferably comprises less than 100 ppm, particularly preferably less than 50 ppm and very particularly preferably less than 20 ppm of alkali metal and alkaline earth metal ions.

[0078] Suitable rubber-modified vinyl (co)polymers as component B are, for example, Magnum® 3404, Magnum® 3504 and Magnum® 3904 from Trinseo SA (Luxembourg).

[0079] Component C One or more representatives selected from the group consisting of polymeric additives and blend partner polymers may optionally be present as component C.

[0080] The polymer additive / partner polymer is preferably selected from the group consisting of lubricants and release agents, stabilizers, colorants, compatibilizers, further impact modifiers different from component B, further polymer constituents different from components A and B (e.g. functional compounding partners or graft polymers with a core-shell structure prepared in an emulsion polymerization process), and fillers and reinforcing agents.

[0081] In a preferred embodiment, there is no filler or reinforcing agent in component C. Even more preferred is the absence of a pigment. Even more preferred is the absence of a blend partner polymer. Even more preferred is the absence of a polymer component. In a particularly preferred embodiment, there is no filler or reinforcing agent, no pigment or blend partner polymer. Most preferred is the absence of a filler or reinforcing agent, no pigment or polymer component.

[0082] In a preferred embodiment, at least one polymeric additive selected from the group consisting of lubricants and mold release agents and stabilizers is used as component C.

[0083] In a preferred embodiment, at least one representative selected from the group consisting of sterically hindered phenols, organic phosphites, and organic or inorganic Bronsted acids is used as stabilizer.

[0084] In a preferred embodiment, fatty acid esters, particularly preferably fatty acid esters of pentaerythritol or glycerol, are used as lubricants and release agents.

[0085] In a particularly preferred embodiment, the C of pentaerythritol 8 ~C 22 Fatty acid esters, glycerol C 8 ~C 22 At least one polymer additive selected from the group consisting of fatty acid esters, tris(2,4-di-tert-butylphenyl)phosphite, 2,6-di-tert-butyl-4-(octadecaneoxycarbonylethyl)phenol, tetrakis(2,4-di-tert-butylphenyl)-4,4-biphenyl diphosphonite, bis(2,4-di-tert-butylphenyl)pentaerythritol diphosphite, and triethylene glycol bis[3-(3-tert-butyl-4-hydroxy-5-methylphenyl)propionate] is used as component C.

[0086] In a further embodiment, Component C does not include a rubber-modified vinyl (co)polymer prepared by emulsion polymerization.

[0087] Preparation of the molding compound for the support layer From components A, B and C according to the invention a thermoplastic molding compound is produced.

[0088] For example, the thermoplastic molding compounds according to the invention can be produced when the individual components of the composition are mixed in a well-known manner and melt-compounded and melt-extruded in customary equipment, such as, for example, internal mixers, extruders and twin-screw extruders, preferably at temperatures between 200°C and 320°C, particularly preferably between 240°C and 300°C, very particularly preferably between 260°C and 290°C.

[0089] In the context of this application, this process is generally referred to as compounding.

[0090] Thus, the term "moulding compound" should be understood to mean the product obtained when the constituents of the composition are melt compounded and melt extruded.

[0091] The mixing of the individual components of the composition can be carried out in a known manner, either sequentially or simultaneously, at temperatures either about 20° C. (room temperature) or higher, i.e., for example, some components can be introduced through the main intake of an extruder and the remaining components can be introduced through a side extruder at a later time during the compounding process.

[0092] Decorative layer (II) The multi-layer article comprises as layer (II) a stone product, an animal leather product, a textile containing synthetic fibers, a material of plant origin or a material containing a component of plant origin, or a layer of a laminate containing one or more of the listed materials; Furthermore, layer (II) has, at least in partial regions of its actual local thickness, a transmittance at least at one wavelength in the wavelength range of the spectrum from 380 nm to 780 nm of at least 25%, preferably at least 40%, most preferably at least 50%, where the transmittance is determined from a transmission spectrum measured according to the standard in DIN / ISO 13468-2 (2006 edition) or Or, Layer (II) has a transmittance of less than 25% in the entire wavelength range of the spectrum from 380 nm to 780 nm, where the transmittance is determined from the transmission spectrum measured according to the standard in DIN / ISO 13468-2 (2006 edition), and layer (II) comprises at least one cutout in the form of at least one symbol, one pattern, one hole, one line or one letter or comprises dot-like cutouts arranged in the form of at least one symbol, one pattern, one hole, one line or one letter.

[0093] In this embodiment, the multilayer article is transilluminated from the support side, causing the shapes represented by the cutouts to become visible on the visible side of the multilayer article.

[0094] The materials used for layer (II) are temperature and / or pressure sensitive, and therefore it is advantageous to use the lowest possible temperature or pressure in the production of the multilayer article by film insert molding of layer (II) with the material of the support layer (I).

[0095] Preferably used plant-derived materials include natural wood, plywood, cork, paper, cellulose products or textiles made from natural fibers such as silk, cotton, flax or hemp.

[0096] Materials containing plant-derived components as described above that are suitable for producing the decorative layer according to the present invention preferably contain these plant-derived components in a proportion of at least 20% by weight, particularly preferably at least 50% by weight, and particularly preferably at least 70% by weight.

[0097] Brittle materials are pressure sensitive because they tend to break in thin layers. This is the case for example with stone products such as natural stone or other stone-like materials. In the context of the present invention, all kinds of natural stone and stone-like materials are generally referred to as stones or stone products and the corresponding layers as stone layers.

[0098] Stone layers are layers of metamorphic or sedimentary rocks. They comprise a number of relatively separate layers that can be extracted as thin layers from natural stone materials. Suitable stone materials are, for example, slate-like claystone or slate clay, limestone, sandstone, mudstone, clay shale, quartzite, phyllite, mica shale, chlorite schist, gneiss, talc schist, blue schist or glaucophane schist, colored slate, prasinite, epidote amphibolite, amphibolite, emblekite, agmatite, calcareous schist, crushed rock, argillite, migmatite, marble, serpentine, eclogite, schist, fruchtschiefer or granulite. The stone layers preferably comprise colored slate, mica shale, limestone, sandstone or marble, more preferably consist of one of these rocks. In principle, the stone layers may be composed of different stone elements, for example constituting a mosaic of one or more types of stone. However, the stone layer preferably consists of one type of stone and is machined in one piece.

[0099] The stone-like materials used include composite materials comprising at least 50% by weight, preferably at least 70% by weight, more preferably at least 80% by weight, most preferably at least 90% by weight of mineral components / mineral-derived components and up to 50% by weight, preferably up to 30% by weight, more preferably up to 20% by weight, particularly preferably up to 10% by weight of polymeric binders and / or other additive components. Such composite materials are produced by compounding or preferably pressing, preferably at high pressure and / or high temperature, a homogeneous mixture of optionally processed rock powder, such as aluminum hydroxide (obtained from bauxite) or quartz powder, with polymeric binders and / or other additive components. These are often sold as artificial stones, for example under the trade names Dekton™, Corian™, Himacs™ or Silestone™. In the context of the present invention, stone-like materials should be understood to include ceramics and mineral glasses.

[0100] The thickness of the stone layer is at most 2 mm, preferably at most 1 mm, more preferably at most 0.5 mm, particularly preferably at most 0.3 mm, said thickness being averaged over the surface area of ​​the stone layer.

[0101] An exemplary suitable animal leather product is leather. It may be smooth or rough-out leather, for example, of cow, calf, goat or sheep. Leather may be obtained by various tanning processes and may also be subjected to surface treatments. These treatments are known to those skilled in the art.

[0102] Plywood should be understood to mean a sheet consisting of at least one wood layer separated from a log by peeling, cutting or sawing (DIN 4079). Another option is to glue the lumber stacks together to obtain blocks and then cut said blocks.

[0103] The preferably used plywood has a thickness in the range of 0.1 mm to 0.5 mm. Very thin plywood requires special care in its processing, since it is prone to cracking.

[0104] The at least one veneer preferably comprises at least one wood layer of any desired wood type, with veneers from the group of maple, birch, tulip tree, cherry, ash, alder, beech, walnut, oak, plain and mahogany being particularly preferred.

[0105] The wood layer can be natural or stained. The staining can be over the entire area or only in partial areas. The wood layer can create both visual and tactile effects.

[0106] In a preferred embodiment, layer (II) is a layer of a material selected from the group consisting of animal leather, a textile comprising synthetic fibers, a material of plant origin or a material comprising components of plant origin or a laminate comprising one or more of the materials listed, more preferably a layer of a material selected from the group consisting of a textile comprising synthetic fibers, a material of plant origin or a material comprising components of plant origin or a laminate comprising one or more of the materials listed, particularly preferably a layer of a material of plant origin or a laminate comprising a material of plant origin, most preferably a layer of natural wood, in particular natural veneer.

[0107] Layer (II) may be further treated on the side opposite the support layer by pickling, milling, impregnation, lacquering, dye application, or other techniques to alter the surface impression or haptics, which can be performed on the finished multilayer article or on layer (II) prior to adhesion to a support material.

[0108] Alternatively, in a first specific embodiment, it is also possible to realize a decorative layer (II) which can be transilluminated only in partial regions, if the layer of a stone product, an animal leather product, a textile comprising synthetic fibers, a material of plant origin or a material comprising components of plant origin or a laminate comprising one or more of the listed materials, which has a transmission in the actual thickness of at least one wavelength in the wavelength range of the spectrum from 380 nm to 780 nm of at least 25%, more preferably at least 40%, most preferably at least 50%, the transmission being determined from a transmission spectrum measured according to the standard in DIN / ISO 13468-2 (2006 edition), is coated, for example printed, with a light-opaque layer, for example a lacquer, on the side opposite to the visible side of the multilayer component, i.e. facing the support I made of a thermoplastic material, and which light-opaque layer comprises at least one cutout (preferably in the shape described above). In this first specific embodiment, the manufacture of the multilayer article according to the invention comprises subjecting the side of the layer (II) thus produced, provided with the light-impermeable layer, to a film insert molding with a thermoplastic molding compound, as a result of which the appearance of stone products, animal leather products, textiles containing synthetic fibers, materials of plant origin or materials containing components of plant origin, or laminates comprising one or more of the listed materials, is preserved on the visible side of the multilayer article.

[0109] In this first specific embodiment, the multilayer article comprises, starting from the visible side, a decorative layer (II), a light-impermeable layer (e.g. a lacquer) having at least one cutout, and a support layer (I), in that order.

[0110] In a second specific embodiment, first a decorative layer (II) (having a transmittance of at least 25%, more preferably at least 40%, most preferably at least 50% at at least one wavelength in the wavelength range of the spectrum from 380 nm to 780 nm, where the transmittance is determined from a transmission spectrum measured according to the standard in DIN / ISO 13468-2 (2006 edition)) is subjected to film insert molding with a support material to form a support layer (I), and then the side of the support layer (I) opposite to the decorative layer (II) is coated, e.g. printed, with a light-opaque layer, e.g. a lacquer, which light-opaque layer comprises at least one cutout.

[0111] In this second specific embodiment, the multilayer article comprises, starting from the visible side, a decorative layer (II), a support layer (I) and a light-impermeable layer (e.g. a lacquer) having at least one cutout, in that order.

[0112] Layer (II) may be coated with a coating composition on the side opposite to the support layer, i.e. the visible side.The coating is typically intended to provide mechanical protection from abrasion and scratching, and / or protection from weathering effects, i.e. precipitation, temperature changes, and UV radiation.Certain surface haptics or surface optics can also be achieved by coating.

[0113] Suitable coatings are, for example, heat-curable coating systems based on polysiloxane coatings, which can be either single-layer systems or multi-layer systems (with merely an adhesion-promoting primer layer between the substrate and the polysiloxane topcoat).

[0114] It is also possible to use UV-curable coating systems based, for example, on acrylates, urethane acrylates or acryloyl silanes, optionally containing fillers which improve scratch resistance.

[0115] Manufacturing of multi-layer articles The multilayer article is preferably manufactured by in-mold decoration (IMD). IMD is a special type of injection molding, in which an optionally three-dimensionally preformed layer of material of the decorative layer (II) is inserted as an insert into the injection mold before the injection of the plastic melt. Such processes are known to those skilled in the art and are widely used.

[0116] The insert is usually a film, sheet or other layer that has been subjected to molding. The deformation can be carried out using mechanical thermoforming or non-contact thermoforming. For this, for example, deep drawing is used. Other methods are vacuum deep drawing, compression or blow molding. For tighter positional tolerances, known high pressure forming (HPF) methods are used, for example as described in EP 2197656. The film is generally cut out after molding. This can be done by common methods such as punching, milling, knife cutting, laser cutting and water jet cutting.

[0117] In a simple preferred method, the production of the multi-layer article according to the invention preferably comprises the steps of: a) creating a layer of material selected from the group consisting of stone, animal hides, textiles containing synthetic fibers, materials of plant origin or containing plant-derived components, or a laminate comprising one or more of the listed materials; Furthermore, layer (II) has, at least in partial regions of its actual local thickness, a transmittance at least at one wavelength in the wavelength range of the spectrum from 380 nm to 780 nm of at least 25%, preferably at least 40%, most preferably at least 50%, where the transmittance is determined from a transmission spectrum measured according to the standard in DIN / ISO 13468-2 (2006 edition) or Or, layer (II) has a transmittance of less than 25% in the entire wavelength range of the spectrum from 380 nm to 780 nm, where the transmittance is determined from the transmission spectrum measured according to the standard in DIN / ISO 13468-2 (2006 edition), layer (II) comprises at least one cut-out in the form of at least one symbol, one pattern, one hole, one line or one letter or comprises dot-like cut-outs arranged in the form of at least one symbol, one pattern, one hole, one line or one letter; b) optionally thermoforming the layer produced in step a); c) subjecting the layer to film insert molding with a thermoplastic molding compound as described above; Includes.

[0118] It is also possible for the three-dimensional shaping of layers and the film insert shaping to take place in a single injection mould. Such a simplified method is described, for example, in WO 2014 / 044694.

[0119] After the decorative layer (II) is subjected to film insert molding together with the support material, it is also possible to apply a further layer of a thermoplastic material, preferably a transparent material, in an overmolding process, so that this further layer seamlessly surrounds the surface of the component obtained after film insert molding. Overmolding is known to the person skilled in the art and is described, for example, in the published specifications of WO 2012 / 069590, EP 2402140 and DE 102007011338.

[0120] The support layer (I) preferably has a thickness of 0.5 mm to 5 mm, particularly preferably 1.5 mm to 3.5 mm, particularly preferably 1.7 mm to 3.0 mm. This should be understood to mean that the support layer (I) has a thickness in these ranges at any point in the range, and it is preferable to use a support layer thickness of at most 3.0 mm, more preferably at most 2.5 mm, particularly preferably at most 2.2 mm in the transilluminated area. The layer does not necessarily have to have the same thickness over the entire area, but rather may have different thicknesses, for example, depending on the configuration of the reinforcing ribs, the shape of the components, or the mounting structure, etc.

[0121] Further embodiments of the present invention are described below:

[0122] 1. (I) a support layer composed of a thermoplastic molding compound containing the following A), B), and C); (II) a layer of a material selected from the group consisting of stone products, animal leather products, textiles containing synthetic fibers, materials of plant origin or materials containing plant-derived components, or laminates containing one or more of the materials listed; A multi-layer article comprising: A) at least one representative selected from the group consisting of aromatic polycarbonates and aromatic polyester carbonates; B) a rubber-modified vinyl (co)polymer consisting of the following B.1) and B.2): C) optionally at least one further component selected from polymer additives and blending partner polymers, B.1) 80% to 95% by weight of structural units derived from at least one vinyl monomer, based on the rubber-modified vinyl (co)polymer B; and B.2) 5% to 20% by weight, based on the rubber-modified vinyl (co)polymer B, of one or more elastomeric graft substrates having a glass transition temperature below -50°C and containing at least 50% by weight, based on B.2, of structural units derived from 1,3-butadiene; Here, the rubber-modified vinyl (co)polymer B is (i) a dispersed phase consisting of (i.1) and (i.2) below; (ii) a rubber-free vinyl (co)polymer matrix consisting of structural units of B.1 that are not bonded to and trapped in rubber particles; Including, (i.1) rubber particles grafted with a vinyl (co)polymer composed of structural units of B.1, and (i.2) vinyl (co)polymers also composed of structural units of B.1 entrapped in rubber particles as a separate dispersed phase, wherein the dispersed phase of (i) has a median diameter D50 of 0.7 μm to 2.0 μm as measured by ultracentrifugation; The thermoplastic molding compound contains less than 2% by weight of a rubber-based graft polymer different from component B), and The thermoplastic molding compound has a rubber content of at least 1.5% by weight; wherein the layer (II) has, at least in partial regions of its actual local thickness, a transmittance of at least 25% at at least one wavelength in the wavelength range of the spectrum from 380 nm to 780 nm, where the transmittance is determined from a transmission spectrum measured according to the standard in DIN / ISO 13468-2 (2006 edition) or Or, 1. A multi-layer article, comprising: layer (II) having a transmittance of less than 25% in the entire wavelength range of the spectrum from 380 nm to 780 nm, the transmittance being determined from a transmission spectrum measured according to the standard in DIN / ISO 13468-2 (2006 edition); layer (II) comprising at least one cut-out in the form of at least one symbol, one pattern, one hole, one line or one letter, or comprising dot-like cut-outs arranged in the form of at least one symbol, one pattern, one hole, one line or one letter.

[0123] 2. The multi-layer article of embodiment 1, wherein the plant-derived material is natural wood, plywood, cork, paper, a cellulose product, or a woven fabric made from natural fibers.

[0124] 3. The multi-layer article of embodiment 1 or 2, wherein the animal leather product is leather.

[0125] 4. The multilayer article of any one of the previous embodiments, wherein layer (II) comprises natural wood or a laminate comprising natural wood.

[0126] 5. The multilayer article according to any of the above embodiments, wherein layer (II) has, at least in partial regions of its actual local thickness, a transmittance at least 40%, preferably at least 50%, at at least one wavelength in the wavelength range of the spectrum from 380 nm to 780 nm, where the transmittance is determined from a transmission spectrum measured according to the standard in DIN / ISO 13468-2 (2006 edition).

[0127] 6. The multilayer article of any of the preceding embodiments, wherein the thickness of the support layer is in the range of 0.5 mm to 5 mm.

[0128] 7. The support layer is 30% to 85% by weight of component A; 14% to 69% by weight of component B; 0.05% to 20% by weight of component C; The multi-layer article of any of the preceding embodiments, comprising:

[0129] 8. The multilayer article of any of the previous embodiments, wherein the support layer comprises 50% to 82% by weight of component A, 17% to 49% by weight of component B, and 0.1% to 10% by weight of component C.

[0130] 9. The multilayer article of any of the previous embodiments, wherein the support layer comprises 58% to 82% by weight of component A, 17% to 41% by weight of component B, and 0.2% to 5% by weight of component C.

[0131] 10. The multilayer article of any of the previous embodiments, wherein the support layer comprises 65% to 75% by weight of component A, 24% to 34% by weight of component B, and 0.3% to 2% by weight of component C.

[0132] 11. A multilayer article according to any of the previous embodiments, wherein the support layer comprises less than 1% by weight of a rubber-based graft polymer different from component B).

[0133] 12. A multilayer article according to any of the previous embodiments, wherein the support layer comprises less than 0.5% by weight of a rubber-based graft polymer different from component B).

[0134] 13. A multilayer article according to any of the previous embodiments, wherein the support layer does not contain any rubber-based graft polymer different from component B).

[0135] 14. A multi-layer article according to any of the previous embodiments, wherein the support layer has a rubber content in the range of 1.5% to 6% by weight.

[0136] 15. A multi-layer article according to any of the previous embodiments, wherein the support layer has a rubber content in the range of 1.8% to 5% by weight.

[0137] 16. A multilayer article according to any of the previous embodiments, wherein the support layer has a rubber content of 1.9% to 4.1% by weight.

[0138] 17. A multi-layer article according to any of the previous embodiments, wherein the support layer has a rubber content in the range of 2.5% to 3.5% by weight.

[0139] 18. A multilayer article according to any of the previous embodiments, wherein component A of the support layer is an aromatic polycarbonate based solely on bisphenol A.

[0140] 19. A multilayer article according to any of the previous embodiments, wherein component B of the support layer is produced by a bulk polymerization process.

[0141] 20. A multilayer article according to any of the previous embodiments, wherein component B) contains less than 20 ppm total of alkali metal and alkaline earth metal ions.

[0142] 21. The multilayer article of any of the previous embodiments, wherein the support layer consists of component A, component B, and component C.

[0143] 22. As a support layer in a multilayer article, A) at least one representative selected from the group consisting of aromatic polycarbonates and aromatic polyester carbonates; B) a rubber-modified vinyl (co)polymer consisting of the following B.1) and B.2): C) optionally at least one further component selected from polymer additives and blending partner polymers, Use of a thermoplastic molding compound comprising B.1) 80% to 95% by weight of structural units derived from at least one vinyl monomer, based on the rubber-modified vinyl (co)polymer B; and B.2) 5% to 20% by weight, based on the rubber-modified vinyl (co)polymer B, of one or more elastomeric graft substrates having a glass transition temperature below -50°C and containing at least 50% by weight, based on B.2, of structural units derived from 1,3-butadiene; Here, the rubber-modified vinyl (co)polymer B is (i) a dispersed phase consisting of (i.1) and (i.2) below; (ii) a rubber-free vinyl (co)polymer matrix consisting of structural units of B.1 that are not bonded to and trapped in rubber particles; Including, (i.1) rubber particles grafted with a vinyl (co)polymer composed of structural units of B.1, and (i.2) vinyl (co)polymers also composed of structural units of B.1 entrapped in rubber particles as a separate dispersed phase, wherein the dispersed phase of (i) has a median diameter D50 of 0.7 μm to 2.0 μm as measured by ultracentrifugation; The thermoplastic molding compound contains less than 2% by weight of a rubber-based graft polymer different from component B), and The thermoplastic molding compound has a rubber content of at least 1.5% by weight; The multi-layer article comprises the following components: (I) support layer; (II) A layer of material selected from the group consisting of stone products, animal leather products, textiles containing synthetic fibers, materials of plant origin or materials containing plant-derived components, or laminates containing one or more of the materials listed; Including, wherein the layer (II) has, at least in partial regions of its actual local thickness, a transmittance at least at one wavelength in the wavelength range of the spectrum from 380 nm to 780 nm of at least 25%, wherein the transmittance is determined from a transmission spectrum measured according to the standard in DIN / ISO 13468-2 (2006 edition) or Or, The layer (II) has a transmittance of less than 25% in the entire wavelength range of the spectrum from 380 nm to 780 nm, where the transmittance is determined from the transmission spectrum measured according to the standard in DIN / ISO 13468-2 (2006 edition), and the layer (II) comprises at least one cut-out in the form of at least one symbol, one pattern, one hole, one line or one letter or comprises dot-like cut-outs arranged in the form of at least one symbol, one pattern, one hole, one line or one letter.

[0144] 23. A method for producing a multi-layer article, comprising: a) preparing a layer (II) of material selected from the group consisting of stone, animal leather, textiles containing synthetic fibers, materials of plant origin or containing components of plant origin, or a laminate comprising one or more of the listed materials; Furthermore, the layer (II) has, at least in partial regions of its actual local thickness, a transmittance at least at one wavelength in the wavelength range of the spectrum from 380 nm to 780 nm of at least 25%, where the transmittance is determined from a transmission spectrum measured according to the standard in DIN / ISO 13468-2 (2006 edition) or Or, layer (II) has a transmittance of less than 25% in the entire wavelength range of the spectrum from 380 nm to 780 nm, where the transmittance is determined from the transmission spectrum measured according to the standard in DIN / ISO 13468-2 (2006 edition), layer (II) comprises at least one cut-out in the form of at least one symbol, one pattern, one hole, one line or one letter or comprises dot-like cut-outs arranged in the form of at least one symbol, one pattern, one hole, one line or one letter; b) optionally thermoforming the layer produced in step a); c) subjecting the layer to film insert molding using a thermoplastic molding compound comprising the following A), B), and C); Including, A) at least one representative selected from the group consisting of aromatic polycarbonates and aromatic polyester carbonates; B) a rubber-modified vinyl (co)polymer consisting of the following B.1) and B.2): C) optionally at least one further component selected from polymer additives and blending partner polymers, B.1) 80% to 95% by weight of structural units derived from at least one vinyl monomer, based on the rubber-modified vinyl (co)polymer B; and B.2) 5% to 20% by weight, based on the rubber-modified vinyl (co)polymer B, of one or more elastomeric graft substrates having a glass transition temperature below -50°C and containing at least 50% by weight, based on B.2, of structural units derived from 1,3-butadiene; Here, the rubber-modified vinyl (co)polymer B is (i) a dispersed phase consisting of (i.1) and (i.2) below; (ii) a rubber-free vinyl (co)polymer matrix consisting of structural units of B.1 that are not bonded to and trapped in rubber particles; Including, (i.1) rubber particles grafted with a vinyl (co)polymer composed of structural units of B.1, and (i.2) vinyl (co)polymers also composed of structural units of B.1 entrapped in rubber particles as a separate dispersed phase, wherein the dispersed phase of (i) has a median diameter D50 of 0.7 μm to 2.0 μm as measured by ultracentrifugation; The thermoplastic molding compound contains less than 2% by weight of a rubber-based graft polymer different from component B), and The thermoplastic molding compound has a rubber content of at least 1.5% by weight.

[0145] twenty four. a) a multilayer article according to any one of embodiments 1 to 21; b) a light source emitting light having at least one wavelength within the wavelength range of the spectrum from 380 nm to 780 nm; A lighting unit or a display unit comprising: The light source b) is an illumination or display unit arranged such that the support layer (I) of the multilayer article a) is transilluminated by the light emitted by said light source b).

[0146] 25. The lighting or display unit of embodiment 24, wherein the light source b) is an LED light source. EXAMPLES

[0147] Ingredient A-1: Weight average molecular weight M of 24000 g / mol w (determined by GPC at room temperature in methylene chloride against BPA-PC standards)

[0148] Component A-2: Weight average molecular weight M of 28000 g / mol w (determined by GPC at room temperature in methylene chloride against BPA-PC standards)

[0149] Ingredient B-1: An acrylonitrile-butadiene-styrene (ABS) polymer produced in a bulk polymerization process, comprising a dispersed phase composed of rubber particles grafted with styrene-acrylonitrile copolymer based on polybutadiene rubber as a graft substrate, with the styrene-acrylonitrile copolymer entrapped as a separate dispersed phase, and a styrene-acrylonitrile copolymer matrix that is not chemically bonded to the rubber particles and is not entrapped in the rubber particles. Component B-1 has an A:B:S ratio of 23%:10%:67% by weight, and a gel content of 20% by weight, determined as the portion insoluble in acetone. The acetone-soluble portion of component B-1 has a weight average molecular weight M of 165 kg / mol. w (measured by GPC in tetrahydrofuran as solvent using polystyrene standards). The median particle size D50 of the dispersed phase is 0.85 μm, measured by ultracentrifugation. The melt flow rate (MVR) of component B-1, measured according to ISO 1133 (2012 edition) at 220° C. and a piston load of 10 kg, is 6.7 ml / 10 min.

[0150] Ingredient B-2: An acrylonitrile-butadiene-styrene-n-butyl acrylate (ABSBA) polymer produced in a bulk polymerization process, comprising a dispersed phase composed of rubber particles grafted with styrene-acrylonitrile-n-butyl acrylate terpolymer based on polybutadiene rubber as a graft substrate, with styrene-acrylonitrile-n-butyl acrylate terpolymer entrapped as a separate dispersed phase, and a styrene-acrylonitrile copolymer matrix that is not chemically bonded to the rubber particles and is not entrapped in the rubber particles. Component B-2 has an A:B:S:BA ratio of 22.5%:10%:63%:4.5% by weight, and a gel content of 19% by weight, determined as the portion insoluble in acetone. The acetone-soluble portion of component B-2 has a weight average molecular weight M of 115 kg / mol. w(measured by GPC in tetrahydrofuran as solvent using polystyrene standards). The median particle size D50 of the dispersed phase is 0.50 μm, measured by ultracentrifugation. The melt flow rate (MFR) of component C-1, measured according to ISO 1133 (2012 edition) at 220° C. and a piston load of 10 kg, is 28 g / 10 min.

[0151] Ingredient B-3 An acrylonitrile-butadiene-styrene graft polymer having a core-shell structure prepared by emulsion polymerization of a mixture of 27% by weight acrylonitrile and 73% by weight styrene, 43% by weight based on the ABS polymer, in the presence of 57% by weight based on the ABS polymer of particulate crosslinked polybutadiene rubber as a graft substrate, the polybutadiene rubber graft substrate having a bimodal particle size distribution with maxima at 0.28 μm and 0.40 μm, and a median particle size D50 of 0.35 μm as measured by ultracentrifugation.

[0152] Component B-3 does not contain styrene-acrylonitrile copolymer entrapped in rubber particles.

[0153] Ingredient B-4 Acrylonitrile-butadiene-styrene graft polymer with core-shell structure produced by emulsion polymerization of a mixture of 42% by weight of ABS polymer, 26% by weight of acrylonitrile and 74% by weight of styrene in the presence of agglomerated granular polybutadiene rubber as graft substrate, 58% by weight of ABS polymer.Compared to the graft substrate used in component B-3, this polybutadiene rubber graft substrate has a significantly broader monomodal particle size distribution.However, the median particle size D50 of 0.38 μm measured by ultracentrifugation is in the same range as that of component B-3.

[0154] Component B-4 does not contain styrene-acrylonitrile copolymer entrapped in rubber particles.

[0155] Ingredient B-5 It has an acrylonitrile content of 23% by weight and a weight average molecular weight M of 100,000 Da measured by GPC at room temperature in tetrahydrofuran using polystyrene standards. w A styrene-acrylonitrile copolymer produced in a bulk polymerization process having the formula:

[0156] Component C1: Pentaerythritol tetrastearate.

[0157] Component C-2: Irganox™ B900 (BASF, Ludwigshafen, Germany) A mixture of 80% by weight of tris(2,4-di-tert-butyl-phenyl)phosphite (Irgafos® 168) and 20% by weight of 2,6-di-tert-butyl-4-(octadecaneoxycarbonylethyl)phenol (Irganox® 1076).

[0158] Component C3: Irganox™ 1076 (BASF, Ludwigshafen, Germany) 2,6-Di-tert-butyl-4-(octadecaneoxycarbonylethyl)phenol.

[0159] Preparation and testing of the moulding compounds according to the invention The molding compounds were prepared in a ZSK25 twin-screw extruder from Coperion, Werner & Pfleiderer (Stuttgart, Germany) at a melt temperature of 260° C. and an applied vacuum of 100 mbar (absolute).

[0160] Test specimens were prepared in an Arburg 270 E injection molding machine at a melt temperature of 260°C and a mold temperature of 80°C.

[0161] The melt viscosity was measured according to ISO 11443 (2014 edition) at a temperature of 260°C and 1000s -1 The shear rate was determined.

[0162] The IZOD notched impact strength was determined in accordance with ISO 180 / 1A (2013 edition) on test bars with dimensions of 80 mm x 10 mm x 4 mm at temperatures ranging from -50 °C to 23 °C. Measurements at various temperatures were used to determine the ductile-brittle transition temperature as the temperature at which 50% of the specimens under test undergo brittle fracture and 50% undergo ductile fracture.

[0163] To determine the material ductility under multiaxial stress at low temperatures, puncture tests according to ISO 6603-2 (2002 edition) were carried out at -20°C on 10 specimens with dimensions of 60 mm x 60 mm x 2 mm in each case. The percentage of brittle fracture serves as a measure of the material ductility under multiaxial stress. Brittle fracture is to be understood as meaning a fracture failure in which a part of the specimen breaks during the puncture test and / or the specimen shows an unstable crack propagation, such that the specimen breaks completely in two along such a crack during the test.

[0164] The elastic modulus E and the elongation at break were determined in dumbbells with dimensions of 170 mm x 10 mm x 4 mm at a strain rate of 1 mm / min (elastic modulus) or 5 mm / min (elongation at break) at 23°C according to ISO 527 (1996 edition).

[0165] As a measure of the heat distortion resistance, the Vicat B / 120 softening temperature is determined in accordance with ISO 180 / 1A (2014 edition) on test bars having dimensions of 80 mm x 10 mm x 4 mm.

[0166] As a measure of the transilluminability, the total light transmittance was determined in accordance with ISO 13468-2 (2006 edition) (illuminant: D65, observer: 10°) on test specimens having dimensions of 60 mm x 40 mm x 2 mm (i.e. with a material thickness of 2 mm).

[0167] The half-power angle (HPA) of light intensity was used as a measure of light diffusivity. A larger half-power angle means stronger light scattering. The half-power angle is determined by measuring the intensity of light after transillumination of a test piece having dimensions of 60 mm × 40 mm × 2 mm (i.e., having a material thickness of 2 mm) according to the polar angle measured for the incident light beam in the range of 0° to 90°. The obtained values ​​are normalized to the intensity value measured at an angle of 0°, so that the normalized intensity varies between 0 and 1 according to the polar angle θ (where I(0°) = 1). The half-power angle (HPA) is defined as the angle at which the normalized intensity drops to 0.5 (i.e., I(HPA) = 0.5). According to this definition, the theoretical maximum possible half-power angle is 60°.

[0168] [Table 1]

[0169] The data in table 1 make clear that the inventive molding compounds, which contain as component B the inventive component B-1 and are within the scope of the invention in terms of the polybutadiene rubber content, show a surprisingly advantageous combination of high light transmission and high light diffusion (scattering power). Moreover, the inventive molding compounds show an advantageous combination of improved melt flowability (reduced melt viscosity) and good mechanical properties, especially good material toughness even at low temperatures. In contrast, molding compounds not according to the invention, which contain as component B the inventive emulsion-polymerized ABS components B-3 or B-4 or the inventive bulk-polymerized ABS component B-2, are not able to achieve this technical problem of the invention. The same applies to the molding compounds composed of compositions V9 and V13, which are outside the scope of the invention in terms of the polybutadiene rubber content.

[0170] Fabrication and Evaluation of Multilayer Articles Multilayer article 1 (comparison) For the preparation of the support (I), Makrolon® Ai from Covestro Deutschland AG (Leverkusen, Germany) was used, which is an aromatic polycarbonate based on bisphenol A and has an MVR of 19 cm, determined at 300° C. and a piston load of 1.2 kg according to DIN ISO 1133:2012-03. 3 / (10 min) and contains a UV absorber and a mold release agent. Prior to injection molding, the Makrolon™ was dried in dry air at 120° C. for 4 hours.

[0171] The decorative layer (II) used was a Microwood™ (Liedekerke, Belgium) plywood with a thickness of about 0.1 mm, precut to the shape of the multi-layer article according to FIG. 1, with three additional holes provided at the edge of the part so that the plywood could be attached and fixed on the holding pins in the injection mould. The dimensions of the multi-layer article are 400 mm x 120 mm x 4 mm. The circular area on the left of the multi-layer article according to FIG. 1 is the gate area of ​​the support layer (I) produced in the injection moulding. A pin gate with a heating channel was used.

[0172] A two-layer multilayer article was then produced using a KM GX400 injection molding machine from KraussMaffei Group GmbH (Munich, Germany) from the veneer board as decorative layer (II) and the support (I) made from Makrolon™ as described above.

[0173] This was done in a first step by fixing each veneer on a holding pin in the upper half of a steel mould. After closing the mould, transparent Makrolon™ molten at 300° C. was injected onto the veneer in the mould with a maximum specific injection pressure of about 1500 bar. The temperature of the mould walls was 90° C. on both the ejector side and the opposite injection side. The injection time was 4 seconds. After a holding time of 15 seconds (specific holding pressure: 700 bar) and a cooling time of 40 seconds, the mould was opened and the moulding was removed. The listed injection moulding conditions were optimised to ensure complete filling of the injection mould and the best possible appearance of the produced multi-layer article.

[0174] Multilayer article 2 (example of the present invention) To produce the substrate (I), a molding compound was selected having the composition of Example 11 in Table 1. Before injection molding, pellets of the PC / ABS molding compound according to the invention were dried in dry air at 105° C. for 4 hours.

[0175] Unlike the comparative example (production of multilayer article 1), after closing the mold, a PC / ABS molding compound molten at 270° C. was injected into the mold onto the plywood with a maximum specific injection pressure of about 1350 bar. The temperature of the mold walls was 80° C. on both the ejector side and the opposite injection side. The injection time was again 4 seconds. After a holding time of 15 seconds (specific holding pressure: 600 bar) and a cooling time of 40 seconds, the mold was opened and the molded part was removed. The listed injection molding conditions in this example were also optimized to ensure complete filling of the injection mold and the best possible appearance of the produced multilayer article.

[0176] The veneer of multilayer article 1 (comparative example) showed a bubble-like detachment (approximately 1 cm radius) from the support material in the area of ​​the pin gate due to deformation of the veneer due to the locally elevated thermal load. This undesirable effect did not occur in the case of multilayer article 2 (inventive example).

[0177] Both multilayer article 1 and multilayer article 2 proved capable of diffuse transillumination with high light yield using smartphone LEDs. However, whereas a homogenous, uniformly diffuse transillumination appearance was observable for inventive multilayer article 2, transillumination of multilayer article 1 (comparative) resulted in the undesirable appearance of piercing the gate area on the visible side.

Claims

1. (I) A support layer composed of a thermoplastic molding compound containing the following A), B), C), (II) A layer of material selected from the group consisting of stone products, animal leather products, textiles containing synthetic fibers, plant-derived materials or materials containing plant-derived components, or laminates containing one or more of the listed materials, A multilayer article including, A) At least one representative material selected from the group consisting of aromatic polycarbonates and aromatic polyester carbonates, B) Rubber-modified vinyl (co)polymer composed of B. 1) and B. 2) below, C) Optionally, at least one further component selected from polymer additives and complementary polymers, B. 1) Structural units derived from at least one vinyl monomer in an amount of 80% to 95% by weight relative to the rubber-modified vinyl (co)polymer B, and B. 2) A graft substrate of one or more elastomers comprising 5% to 20% by weight of the rubber-modified vinyl (co)polymer B, having a glass transition temperature of less than -50°C, and containing structural units derived from 1,3-butadiene in an amount of at least 50% by weight of B.

2. Here, the rubber-modified vinyl (co)polymer B is (i) A dispersed phase consisting of (i.1) and (i.2) below, (ii) A rubber-free vinyl (co)polymer matrix consisting of structural units of B.1 that are not bound to rubber particles and are not trapped within these rubber particles, Includes, (i.1) Rubber particles grafted with vinyl(co)polymer composed of structural units of B.1, and (i.2) A vinyl(co)polymer, similarly composed of structural units B.1, enclosed within the rubber particles as a separated dispersed phase. Here, the dispersed phase of (i) has a median diameter D50 of 0.7 μm to 2.0 μm, as measured by ultracentrifugation. Here, the thermoplastic molding compound contains a rubber-based graft polymer different from component B) in less than 2% by weight, The thermoplastic molding compound has a rubber content of at least 1.5% by weight, Here, layer (II) has a transmittance of at least 25% at at least one wavelength within the spectral wavelength range of 380 nm to 780 nm in at least a portion of its actual local thickness, where the transmittance is determined from the transmission spectrum measured according to the standard in DIN / ISO 13468-2 (2006 edition), Or, A multilayer article wherein layer (II) has a transmittance of less than 25% over the entire wavelength range of the spectrum from 380 nm to 780 nm, wherein the transmittance is determined from a transmission spectrum measured in accordance with the standard in DIN / ISO 13468-2 (2006 edition), and layer (II) includes at least one cutout in the shape of at least one symbol, one pattern, one hole, one line or one letter, or includes dot-like cutouts arranged in the shape of at least one symbol, one pattern, one hole, one line or one letter.

2. The multilayer article according to claim 1, wherein the plant-derived material is natural wood, cork, paper, cellulose products, or a fabric made from natural fibers.

3. The multilayer article according to claim 1 or 2, wherein the animal leather product is leather.

4. The multilayer article according to claim 1 or 2, wherein layer (II) includes natural wood or a laminate containing natural wood.

5. The aforementioned support layer is Component A in an amount of 30% to 85% by weight, Component B in an amount of 14% to 69% by weight, Component C in an amount of 0.05% to 20% by weight, A multilayer article according to claim 1 or 2, comprising:

6. The multilayer article according to claim 1 or 2, wherein component B) contains alkali metal and alkaline earth metal ions in a total amount of less than 20 ppm.

7. The multilayer article according to claim 1 or 2, wherein the support layer does not contain a rubber-based graft polymer different from component B).

8. The multilayer article according to claim 1 or 2, wherein the support layer has a rubber content of 2.5% to 3.5% by weight.

9. A method for manufacturing multilayer articles, a) A step of creating a layer of material selected from the group consisting of stone, animal leather products, textiles containing synthetic fibers, plant-derived materials or materials containing plant-derived components, or laminates containing one or more of the listed materials, Furthermore, the layer has a transmittance of at least 25% at at least one wavelength within the spectral wavelength range of 380 nm to 780 nm in at least a portion of its actual local thickness, where the transmittance is determined from the transmission spectrum measured according to the standard in DIN / ISO 13468-2 (2006 edition), Or, The layer has a transmittance of less than 25% over the entire wavelength range of the spectrum from 380 nm to 780 nm, where the transmittance is determined from a transmission spectrum measured in accordance with the standard in DIN / ISO 13468-2 (2006 edition), and the layer (II) includes at least one cutout in the shape of at least one symbol, one pattern, one hole, one line or one letter, or includes dot-like cutouts arranged in the shape of at least one symbol, one pattern, one hole, one line or one letter; b) Optionally, a step of thermoforming the layer manufactured in step a), c) A step of subjecting the layer to film insert molding with a thermoplastic molding compound containing the following A), B), C), Includes, A) At least one representative material selected from the group consisting of aromatic polycarbonates and aromatic polyester carbonates, B) Rubber-modified vinyl (co)polymer composed of B. 1) and B. 2) below, C) Optionally, at least one further component selected from polymer additives and complementary polymers, B. 1) Structural units derived from at least one vinyl monomer in an amount of 80% to 95% by weight relative to the rubber-modified vinyl (co)polymer B, and B. 2) A graft substrate of one or more elastomers comprising 5% to 20% by weight of the rubber-modified vinyl (co)polymer B, having a glass transition temperature of less than -50°C, and containing structural units derived from 1,3-butadiene in an amount of at least 50% by weight of B.

2. Here, the rubber-modified vinyl (co)polymer B is (i) A dispersed phase consisting of (i.1) and (i.2) below, (ii) A rubber-free vinyl (co)polymer matrix consisting of structural units of B.1 that are not bound to rubber particles and are not trapped within these rubber particles, Includes, (i.1) Rubber particles grafted with vinyl(co)polymer composed of structural units of B.1, and (i.2) A vinyl(co)polymer, similarly composed of structural units B.1, enclosed within the rubber particles as a separated dispersed phase. Here, the dispersed phase of (i) has a median diameter D50 of 0.7 μm to 2.0 μm, as measured by ultracentrifugation. Here, the thermoplastic molding compound contains a rubber-based graft polymer different from component B) in less than 2% by weight, The method wherein the thermoplastic molding compound has a rubber content of at least 1.5% by weight.

10. a) A multilayer article according to claim 1 or 2, b) A light source that emits light having at least one wavelength within the spectral wavelength range of 380 nm to 780 nm, A lighting unit or display unit comprising, The light source b) is an illumination unit or display unit in which the support layer (I) of the multilayer article a) is arranged to be illuminated by light emitted from the light source b).