EP3658613A1 - Led-beleuchtungselemente mit formteilen aus transluzenten polycarbonat-zusammensetzungen mit tiefenglanzeffekt - Google Patents

Led-beleuchtungselemente mit formteilen aus transluzenten polycarbonat-zusammensetzungen mit tiefenglanzeffekt

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Publication number
EP3658613A1
EP3658613A1 EP18739875.5A EP18739875A EP3658613A1 EP 3658613 A1 EP3658613 A1 EP 3658613A1 EP 18739875 A EP18739875 A EP 18739875A EP 3658613 A1 EP3658613 A1 EP 3658613A1
Authority
EP
European Patent Office
Prior art keywords
led lighting
lighting element
weight
element according
colorant
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP18739875.5A
Other languages
German (de)
English (en)
French (fr)
Inventor
Ciro Piermatteo
Armin Berger
Gianmaria Malvestiti
Vincenzo Taravella
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Covestro Deutschland AG
Original Assignee
Covestro Deutschland AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Covestro Deutschland AG filed Critical Covestro Deutschland AG
Publication of EP3658613A1 publication Critical patent/EP3658613A1/de
Withdrawn legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21K—NON-ELECTRIC LIGHT SOURCES USING LUMINESCENCE; LIGHT SOURCES USING ELECTROCHEMILUMINESCENCE; LIGHT SOURCES USING CHARGES OF COMBUSTIBLE MATERIAL; LIGHT SOURCES USING SEMICONDUCTOR DEVICES AS LIGHT-GENERATING ELEMENTS; LIGHT SOURCES NOT OTHERWISE PROVIDED FOR
    • F21K9/00—Light sources using semiconductor devices as light-generating elements, e.g. using light-emitting diodes [LED] or lasers
    • F21K9/60—Optical arrangements integrated in the light source, e.g. for improving the colour rendering index or the light extraction
    • F21K9/66—Details of globes or covers forming part of the light source
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K5/00—Use of organic ingredients
    • C08K5/0008—Organic ingredients according to more than one of the "one dot" groups of C08K5/01 - C08K5/59
    • C08K5/0041—Optical brightening agents, organic pigments
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K3/00—Use of inorganic substances as compounding ingredients
    • C08K3/01—Use of inorganic substances as compounding ingredients characterized by their specific function
    • C08K3/013—Fillers, pigments or reinforcing additives
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K3/00—Use of inorganic substances as compounding ingredients
    • C08K3/02—Elements
    • C08K3/04—Carbon
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K3/00—Use of inorganic substances as compounding ingredients
    • C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
    • C08K3/20—Oxides; Hydroxides
    • C08K3/22—Oxides; Hydroxides of metals
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K5/00—Use of organic ingredients
    • C08K5/04—Oxygen-containing compounds
    • C08K5/07—Aldehydes; Ketones
    • C08K5/08—Quinones
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K5/00—Use of organic ingredients
    • C08K5/16—Nitrogen-containing compounds
    • C08K5/34—Heterocyclic compounds having nitrogen in the ring
    • C08K5/3412—Heterocyclic compounds having nitrogen in the ring having one nitrogen atom in the ring
    • C08K5/3432—Six-membered rings
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L33/00—Compositions of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides or nitriles thereof; Compositions of derivatives of such polymers
    • C08L33/04—Homopolymers or copolymers of esters
    • C08L33/06—Homopolymers or copolymers of esters of esters containing only carbon, hydrogen and oxygen, which oxygen atoms are present only as part of the carboxyl radical
    • C08L33/10—Homopolymers or copolymers of methacrylic acid esters
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L69/00—Compositions of polycarbonates; Compositions of derivatives of polycarbonates
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L83/00—Compositions of macromolecular compounds obtained by reactions forming in the main chain of the macromolecule a linkage containing silicon with or without sulfur, nitrogen, oxygen or carbon only; Compositions of derivatives of such polymers
    • C08L83/04—Polysiloxanes
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09B—ORGANIC DYES OR CLOSELY-RELATED COMPOUNDS FOR PRODUCING DYES, e.g. PIGMENTS; MORDANTS; LAKES
    • C09B1/00—Dyes with anthracene nucleus not condensed with any other ring
    • C09B1/16—Amino-anthraquinones
    • C09B1/20—Preparation from starting materials already containing the anthracene nucleus
    • C09B1/26—Dyes with amino groups substituted by hydrocarbon radicals
    • C09B1/32—Dyes with amino groups substituted by hydrocarbon radicals substituted by aryl groups
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09B—ORGANIC DYES OR CLOSELY-RELATED COMPOUNDS FOR PRODUCING DYES, e.g. PIGMENTS; MORDANTS; LAKES
    • C09B5/00—Dyes with an anthracene nucleus condensed with one or more heterocyclic rings with or without carbocyclic rings
    • C09B5/02—Dyes with an anthracene nucleus condensed with one or more heterocyclic rings with or without carbocyclic rings the heterocyclic ring being only condensed in peri position
    • C09B5/14—Benz-azabenzanthrones (anthrapyridones)
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V3/00—Globes; Bowls; Cover glasses
    • F21V3/04—Globes; Bowls; Cover glasses characterised by materials, surface treatments or coatings
    • F21V3/06—Globes; Bowls; Cover glasses characterised by materials, surface treatments or coatings characterised by the material
    • F21V3/062—Globes; Bowls; Cover glasses characterised by materials, surface treatments or coatings characterised by the material the material being plastics
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
    • C08G77/00—Macromolecular compounds obtained by reactions forming a linkage containing silicon with or without sulfur, nitrogen, oxygen or carbon in the main chain of the macromolecule
    • C08G77/04—Polysiloxanes
    • C08G77/045—Polysiloxanes containing less than 25 silicon atoms
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K3/00—Use of inorganic substances as compounding ingredients
    • C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
    • C08K3/20—Oxides; Hydroxides
    • C08K3/22—Oxides; Hydroxides of metals
    • C08K2003/2237—Oxides; Hydroxides of metals of titanium
    • C08K2003/2241—Titanium dioxide
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO THE FORM OR THE KIND OF THE LIGHT SOURCES OR OF THE COLOUR OF THE LIGHT EMITTED
    • F21Y2115/00—Light-generating elements of semiconductor light sources
    • F21Y2115/10—Light-emitting diodes [LED]

Definitions

  • the present invention relates to LED lighting elements comprising moldings and one or more LED to illuminate the moldings with LED light, in particular with RGB LED light, wherein the moldings are made of translucent molding compositions based on aromatic polycarbonate.
  • the LED lighting units are used to implement a day / night design.
  • LED In contrast to conventional bulbs such as light bulbs or fluorescent tubes LED have one of these different radiation characteristics. For applications that require directing the light beam, often lenses or optical fibers must be used.
  • luminous elements with LEDs as the light source usually contain a transparent or translucent housing part which serves to cover the light source, protects the light source and shields against external influences such as dirt and dust.
  • LEDs Due to their long life, their low energy consumption and the good light output, LEDs are increasingly used as lighting sources, e.g. in the automotive industry,
  • Light bulbs are disadvantageous because of their poor efficiency with regard to light emission and high heat development as well as the short lifetime.
  • Energy-saving lamps are significantly more energy-efficient, but because of their heavy metal content, especially mercury, they represent a high environmental impact and must be disposed of as hazardous waste.
  • An alternative illumination source which does not have these disadvantages and also has a long life and high energy efficiency, offers the semiconductor technology (as LED, OLED or electroluminescent film).
  • a preferred use of semiconductor technology as a light source is the LED.
  • LEDs emit light with a wavelength dependent on the semiconductor material and the doping, so that with LED approximately monochromatic light, also in the infrared range or UV range, can be generated.
  • RGB LEDs that emit red, green or blue light.
  • white LED light light of different wavelengths must be combined. This is usually achieved by combining a blue, a red and a green emitting LED into so-called RGB (red-green-blue) modules whose combined perceived light effect can be white, or by luminescence techniques in which all or part of the LED radiation is converted, for example via phosphors, to other wavelengths.
  • white light starting from a blue LED in the visible range, can be generated by adding a single phosphor, which converts part of the radiation in the blue area into red / yellow light.
  • This form of white light generation is preferred for commercial applications for cost reasons and because of the high efficiency of blue LEDs.
  • white light may be generated from LED-generated UV light using three different phosphors which emit wavelengths corresponding to an RGB module. If this technique is used, compositions are preferred which also have an increased stability to UV radiation, that is, for example, provided with a UV stabilization.
  • a high-quality day / night design with a deep gloss of individual elements is required.
  • a hard-coat film such as polycarbonate, with transparent or translucent layers of thermoplastic material, for example based on polycarbonate, back-injected (film injection, IMD), i. at least a two-component construction is required.
  • the light source here is usually LED light used, but also conventional light bulbs can be used. In the off state of the LED, such a molded part preferably shows a high-quality
  • the object was surprisingly achieved by combining special colorants with carbon black and a scattering additive in polycarbonate.
  • the subject of the invention is therefore an LED lighting element comprising a molded part and one or more LED which is / are arranged in the LED lighting element in such a way that it illuminates / illuminates the molded part,
  • the molding is made of a translucent molding composition containing
  • molding compound is meant the finished mixture of polymer and additives.
  • translucent refers to molding compositions which have a transmission in the range from 380 to 780 nm (measured at a thickness of 4 mm in accordance with ISO 13468-2: 2006 (D65, 10 °)) of less than 85%. and greater than 5%, more preferably less than 80% and greater than 20%, and preferably a haze determined by ASTM Dl 003: 2013 at a layer thickness of 4 mm, greater than 5.0% and a maximum of 80.0 % respectively.
  • the molded article is "made from” is not intended to mean that the molded article can not comprise further layers, such as scratch-resistant layers.
  • up to also includes the respective limit value, including the rounding range.
  • “Up to 0.1% by weight” thus comprises not only 0.1% by weight and the values below, but also e.g. 0.12% by weight. “Up to” is thus used synonymously with “to”.
  • the molding compositions used according to the invention make it possible for LED lighting units to produce molded parts for day / night design applications with daylight-deep design optics in a simpler process. Instead of having to connect two components as usual, the same effect can be achieved with a single material that has been shaped into the desired shape, for example by injection molding.
  • the LED lighting units according to the invention have black molded parts with a deep-gloss effect, which have a significantly different appearance than unlit by fluoroscopy with LED light, in particular that of an RGB LED.
  • the one or more LEDs, in particular one or more RGB LEDs, is / are arranged in the lighting element in such a way that it illuminates the molded part in the switched-on state.
  • “transilluminated” means that the LED is arranged behind the molded part, so that part of the light is radiated through the molded part made of translucent material
  • the data in% by weight relate in each case to the entire composition which forms the molding compound.
  • the polymer on which the molding compound from which the molding of the LED lighting element is made is aromatic polycarbonate.
  • Aromatic polycarbonates in the sense of the invention are all known aromatic polycarbonates. This includes homopolycarbonates and copolycarbonates. If in the context of the present invention only "polycarbonate" is mentioned at any point, in particular aromatic polycarbonates are meant.
  • One part, up to 80 mol%, preferably from 20 mol% up to 50 mol%, of the carbonate groups in the polycarbonates used according to the invention can be replaced by aromatic
  • Dicarboxylic acid ester groups to be replaced.
  • Such polycarbonates which contain both acid residues of carbonic acid and acid residues of aromatic dicarboxylic acids incorporated into the molecular chain, are referred to as aromatic polyester carbonates. They are also subsumed in the context of the present invention under the preamble of the thermoplastic, aromatic polycarbonates.
  • melt transesterification process is described, for example, in the "Encyclopedia of Polymer Science", Vol. 10 (1969), Chemistry and Physics of Polycarbonates, Polymer Reviews, H. Schnell, Vol. 9, John Wiley and Sons, Inc. (1964) and US Pat in the patents DE 10 31 512 A and US 6,228,973 Bl.
  • the polycarbonates are preferably prepared by reactions of dihydroxyaryl compounds, in particular bisphenol compounds, with carbonic acid compounds, in particular phosgene, or in the melt transesterification process of diphenyl carbonate or dimethyl carbonate.
  • Dihydroxyaryl compounds suitable for the preparation of polycarbonates are those of the formula (1)
  • HO-Z-OH (1) in which an aromatic radical having 6 to 30 carbon atoms, which may contain one or more aromatic nuclei, may be substituted and may contain aliphatic or cycloaliphatic radicals or alkylaryls or heteroatoms as bridge members.
  • Z in formula (1) preferably represents a radical of the formula (2)
  • R 6 and R 7 independently of one another are H, cis to cis-alkyl, cis to cis-alkoxy, halogen, such as Cl or Br, or each optionally substituted aryl or aralkyl, preferably H or Ci to Ci 2 - Alkyl, particularly preferably H or Ci- to Cs-alkyl and very particularly preferably H or methyl, and
  • X represents a single bond, -SO 2, -CO-, -O-, -S-, C 1 -C 6 -alkylene, C 2 - to C 5 -alkylidene or C 5 -C 10 -cycloalkylidene which is denoted by C 1 - to C 6 -alkyl , preferably methyl or ethyl may be substituted, and furthermore C ⁇ - to C 2 -arylene, which may be condensed with optionally contains further heteroatoms aromatic rings is.
  • X is a single bond, C ⁇ to C 5 alkylene, C 2 to C 5 alkylidene, C to C 8 cycloalkylidene, -O-, -SO-, -CO-, -S-, - SO 2 - or for a radical of the formula (3)
  • dihydroxyaryl compounds are: dihydroxybenzenes, dihydroxydiphenyls, bis (hydroxyphenyl) alkanes, bis (hydroxyphenyl) -cycloalkanes, bis (hydroxyphenyl) -aryls, bis (hydroxyphenyl) ethers, bis (hydroxyphenyl) ketones , Bis (hydroxyphenyl) sulfides, bis (hydroxyphenyl) sulfones, bis (hydroxyphenyl) sulfoxides, 1,1 'bis (hydroxyphenyl) diisopropylbenzenes and their nuclear alkylated and nuclear halogenated compounds.
  • suitable dihydroxyaryl compounds are, for example, hydroquinone, resorcinol, dihydroxydiphenyl, bis (hydroxyphenyl) alkanes, bis (hydroxyphenyl) -cycloalkanes, bis (hydroxyphenyl) (hydroxyphenyl) sulfides, bis (hydroxyphenyl) ethers, bis (hydroxyphenyl) ketones, bis (hydroxyphenyl) sulfones, bis (hydroxyphenyl) sulfoxides, a, a'-bis (hydroxyphenyl) diisopropylbenzenes Phthalimidines derived from isatin or phenolphthalein derivatives and their alkylated, nuclear-alkylated and nuclear-halogenated compounds.
  • Si-containing telechels can also be used, so that so-called Si
  • Copolycarbonates are obtained.
  • Preferred dihydroxyaryl compounds are 4,4'-dihydroxydiphenyl, 2,2-bis (4-hydroxyphenyl) -
  • R ' is in each case C 1 -C 4 -alkyl, aralkyl or aryl, preferably methyl or phenyl, very particularly preferably methyl.
  • dihydroxyaryl compounds are 4,4'-dihydroxydiphenyl, 1,1'-bis (4-hydroxyphenyl) -phenyl-ethane, 2,2-bis (4-hydroxyphenyl) -propane, 2,2-bis (3,5 -dimethyl-4-hydroxyphenyl) -propane, 1,1-bis- (4-hydroxyphenyl) -cyclohexane and 1,1-bis (4-hydroxyphenyl) -3,3,5-trimethylcyclohexane (bisphenol TMC), dimethyl Bisphenol A and the compounds of formulas (I), (II) and (III).
  • Particularly preferred polycarbonates are the homopolycarbonate based on bisphenol A, the homopolycarbonate based on 1,1-bis- (4-hydroxyphenyl) -3,3,5-trimethylcyclohexane and the copolycarbonates based on the two monomers bisphenol A and I, l Bis- (4-hydroxyphenyl) -3,3,5-trimethylcyclohexane and also bisphenol A and the diphenols of the formulas (I), (II) and / or (III)
  • R ' is in each case C 1 -C 10 -alkyl, aralkyl or aryl, preferably methyl or phenyl, very particularly preferably methyl,
  • Chemicals and adjuvants may be contaminated with impurities derived from their own synthesis, handling and storage. However, it is desirable to work with as pure as possible raw materials.
  • the polycarbonates may be linear or branched. It is also possible to use mixtures of branched and unbranched polycarbonates.
  • Suitable branching agents for the preparation of branched polycarbonates are known from the literature and described, for example, in US Pat. Nos. 4,185,009 B and DE 25 00 092 A1 (3,3-bis- (4-hydroxyaryl-oxindoles, see in each case the entire document).
  • DE 42 40 313 A1 see page 3, lines 33 to 55
  • DE 19 943 642 A1 see page 5, lines 25 to 34
  • US 5,367,044 B and the literature cited therein.
  • the amount of optionally used branching agent is preferably 0.05 mol% to 2.00 mol%, based on moles of Dihydroxyarylverbmditch used in each case.
  • the branching agents may be presented either with the dihydroxyaryl compounds and the chain terminators in the aqueous alkaline phase, or may be added in an organic solvent dissolved prior to phosgenation. In the case of the transesterification process, the branching agents are used together with the dihydroxyaryl compounds.
  • polycarbonates used can also be intrinsically branched, in which case no branching agent is added during the polycarbonate production.
  • An example of intrinsic branches are so-called frieze structures, as described for melt polycarbonates in EP 1 506 249 A1.
  • chain terminators can be used in polycarbonate production.
  • Suitable chain terminators that can be used in the preparation of the polycarbonates are monophenols.
  • Suitable monophenols are, for example, phenol itself, alkylphenols such as cresols, p-tert-butylphenol, cumylphenol, and mixtures thereof.
  • Preferred chain terminators are the phenols which are mono- or polysubstituted by Ci- to C30-
  • Alkyl radicals linear or branched, preferably unsubstituted, or substituted with tert-butyl.
  • Particularly preferred chain terminators are phenol, cumylphenol and / or p-tert-butylphenol.
  • the amount of chain terminator to be used is preferably 0.1 to 5 mol%, based on moles of dihydroxyaryl compounds used in each case.
  • the addition of the chain terminators can be carried out before, during or after the reaction with a carbonic acid derivative.
  • the molding compositions from which the moldings of the LED lighting elements are made contain at least two colorants, preferably selected from the group consisting of colorants based on anthraquinone, anthrapyridone, perinone, methine, or quinoline. "Based on” in this specific context means that the basic structure of the colorants of component b) has the respectively named compound as a basic structure, which is furthermore recognizable.
  • colorants of the following structures (4a) to (24):
  • Ra and Rb independently of one another represent a linear or branched alkyl radical or halogen, preferably methyl, ethyl, propyl, isopropyl, butyl, isobutyl, tert-butyl, pentyl, neopentyl, hexyl, thexyl or Cl, more preferably methyl, Cl and especially preferred for Cl,
  • Rc and Rd independently of one another are a linear or branched alkyl radical or halogen, preferably methyl, ethyl, propyl, isopropyl, butyl, isobutyl, tert-butyl, Pentyl, neopentyl, hexyl, thexyl or Cl, more preferably methyl, Cl and particularly preferably Cl,
  • Rc and / or Rd are Cl and are in the ortho and / or para positions to the carbon atoms which carry the amine functionalities, e.g. di-orthochloronaphthalene, di-ortho, mono-para-chloronaphthalene, and mono-ortho-naphthalene.
  • Rc and Rd each represent a tert-butyl radical which is preferably in the meta position to the carbon atoms bearing the nitrogen functionalities.
  • the structures (4a) and (4b) and (5a) and (5b) behave isomerically to each other.
  • the respective isomers can be used alone or in a mixture.
  • a 1: 1 isomer mixture (based on the particular amount of isomer in the isomer mixture in wt .-%) of (4a) and (4b) or (5a) and (5b) is used.
  • the radicals R (5-20) are each independently of one another hydrogen, methyl, ethyl, propyl, isopropyl, butyl, isobutyl, tert-butyl, pentyl, neopentyl, hexyl, thexyl, fluorine, chlorine, bromine, sulfone, CN.
  • R (5-20) is the same in all positions. More preferably, R (5-20) is in all positions H. In an alternative embodiment, R (5-20) is Cl in all positions.
  • Compounds of structure (6a) are e.g. Heliogen® Blue L 7460 available from BASF AG, Ludwigshafen.
  • R 1 and R 2 independently of one another are a linear or branched alkyl radical or halogen, preferably methyl, ethyl, propyl, isopropyl, butyl, isobutyl, tert-butyl, pentyl, neopentyl, hexyl, thexyl or Cl, more preferably methyl, Cl and especially preferred for Cl,
  • - n stands for a natural number between 0 and 4.
  • Colorants of this structure (7) are commercially available under the Paliogen Blue series from BASF AG.
  • the bulk volume (determined according to DIN ISO 787-11) of 2 1 / kg - 10 1 / kg, preferably 3 1 / kg - 8 1 / kg, a specific surface (determined according to DIN 66132: 1975-07) of 5 m 2 / g - 60 m 2 / g, preferably 10 m 2 / g - 55 m 2 / g, and a pH (determined according to DIN ISO 787- 9: 1995- 04) of 4-9.
  • Such colorants are e.g. available under the trade name Macrolex® Violet B from Lanxess AG.
  • Such colorants are e.g. Macrolex® Orange 3G or Macrolex® Red EG available from Lanxess AG.
  • Such colorants are available, for example, under the trade name Macrolex® Red E2G from Lanxess AG, CAS No. 89106-94-5.
  • This colorant with the Color Index 68210 is available under the name “Macrolex® Red 5B” or "Solvent Red 52".
  • the colorant of structure (12) is known by the name Macrolex Green 5B from Lanxess Deutschland GmbH, Color Index Number 61565, CAS Number: 128-90-3, and is an anthraquinone dye.
  • This colorant is available under the name “Keyplast Blue KR” or “Solvent Blue 104", CAS number 116-75-6, color index number: 61568.
  • This colorant is available under the name "Macrolex Blue 3R Gran", CAS number 41611-76-1.
  • This colorant with the Color Index 615290 is commercially available under the name "Keyplast Blue E”, "Macrolex® Blue RR” or "Solvent Blue 97".
  • This colorant with the CAS number 81-48-1 is available under the name "Macrolex Violet B” or “Solvent Violet 13", Color Index 60725, from Lanxess AG.
  • Such colorants are e.g. available under the trade name "Macrolex Green G” from Lanxess AG.
  • This colorant is available under the name “Macrolex RedViolet R”, CAS number 6408-72-6.
  • This colorant is available under the name “Macrolex Yellow 3G” or “Solvent Yellow 93” with the Color Index 48160.
  • This colorant is commercially available under the name “Macrolex Yellow G” or “Solvent Yellow 114" with the Color Index 47020;
  • the amount of colorants of component b) in total in the molding compositions is up to 0.1% by weight, preferably up to 0.05% by weight, more preferably 0.0005% by weight to 0.02% by weight. %.
  • the molding compositions preferably contain a colorant based on anthraquinone and another colorant based on anthraquinone or anthrapyridone. Further preferably, the molding compositions contain no further colorants.
  • the molding compositions even more preferably contain at least one colorant of the following formula
  • Ri is a substituted or unsubstituted phenylamine radical, preferably an unsubstituted phenylamine radical,
  • R 2 is a substituted or unsubstituted phenylamine radical, preferably a p-methylphenylamine radical or a 2,6-diethyl-4-methyl-phenylamine radical, n is a natural number between 0 and 4, preferably 0 or 1, and m is a natural number between 0 and 4, preferably 1 or 2, stands.
  • a colorant of the formula (11) is very particularly preferred as a further colorant, a colorant of the formula (11).
  • colorants according to component b do not comprise colorants of components c and e.
  • Component c is carbon black.
  • the molding compositions used according to the invention contain 0.00001 to 0.05% by weight, preferably 0.0003 to 0.020% by weight, more preferably 0.0004 to 0.015% by weight of carbon black, very particularly preferably 0.00045 to 0.014% by weight .-% carbon black.
  • the carbon black is preferably finely dispersed in the organic polymer matrix and is more preferably nanoscale, in particular a nanoscale carbon black.
  • Suitable carbon blacks have an average particle size, determined by scanning electron microscopy, of preferably less than 100 nm, more preferably less than 75 nm, even more preferably less than 50 nm and particularly preferably less than 40 nm, the average particle size preferably being greater than 0, 5 nm, more preferably greater than 1 nm and more preferably greater than 5 nm, most preferably from 10 to 30 nm, most preferably from 10 to 20 nm.
  • carbon blacks useful in the invention are available from a variety of trade names and forms, such as pellets or powders.
  • suitable carbon blacks are under the trade names BLACK PEARLS®, as wet-processed pellets under the name ELFTEX®,
  • REGAL® and CSX® and in a fluffy form under MONARCH®, ELFTEX®, REGAL® and MOGUL® - all available from Cabot Corporation. Particularly preferred are carbon blacks traded under the trade name BLACK PEARLS® (CAS No. 1333-86-4).
  • the carbon black may be treated or untreated.
  • the carbon black can be treated with certain gases, with silica or organic substances, such as butyllithium. By such a treatment, a modification or functionalization of the surface can be achieved. This can promote compatibility with the matrix used.
  • Particularly preferred are carbon blacks traded under the trade name BLACK PEARLS® (CAS No. 1333-86-4).
  • the litter additive is used in the molding compositions from which moldings of the LED lighting elements are made, in amounts of 0.00001 wt .-% to 2 wt .-%, preferably 0.01 wt .-% to 1.0 wt. -%, more preferably 0.05 wt .-% to 0.50 wt .-% used.
  • the scattering additive may be a single litter additive or a mixture of several litter additives.
  • the litter additive is selected from the group of acrylate-based litter additives and / or the silicone-based scattering additives. It can be a litter additive from this group or even a mixture.
  • the molding compositions particularly preferably contain acrylate-based scattering additive as scattering agent. Most preferably, no silicone-based scattering agent is additionally included. Thus, scattering additives according to the invention are not any of the white pigments mentioned as component e).
  • the scattering additives preferably have a high thermal stability up to 300 ° C in order not to be decomposed at the processing temperatures of polycarbonate.
  • the litter additives should have no functionalities that lead to a significant degradation of the polymer chain.
  • the litter additives should not lead to any degradation of the polymer chain of the polycarbonate.
  • Preferred acrylate-based scattering agents are polyalkyl acrylates having preferably 1 to 8 carbon atoms in the alkyl group, more preferably having an average particle size (number average) of 0.5 ⁇ to 80 ⁇ , preferably 2 ⁇ to 40 ⁇ , in particular 3 ⁇ to 15 ⁇ , in particular 3 ⁇ to 9 ⁇ . Mixtures of alkyl acrylates can also be used
  • the acrylate-based dispersants are preferably crosslinked.
  • crosslinking agents the crosslinking agents known for acrylates are suitable.
  • Preferred crosslinking agents are glycol-based crosslinkers, in particular ethylene glycol dimethacrylate.
  • acrylate-based littering additive are polymethylmethacrylate-containing dispersants, e.g. polymeric particles of polymethyl methacrylate and polybutyl acrylate with core
  • Shell morphology for example available as Paraloid® EXL 5136 or Paraloid® EXL 5137 from Rohm & Haas, or also partially or fully crosslinked spherical or non-spherical acrylate particles, such as e.g. those from the Techpolymer® MBX series from Sekisui Plastics, Techpolymer® MBX-S or MBX-8. Littering additives with core-shell morphology are described, for example, in EP 0 634 445 B1 as "polymeric particle (b)".
  • the silicone-based scattering additives preferably have a mean particle size (number average), from 0.5 ⁇ to 100 ⁇ , preferably 0.5 ⁇ to 20 ⁇ , in particular 1 ⁇ to 6 ⁇ , determined by laser diffraction according to ISO 13320: 2009.
  • Silicone-based suitable dispersants are silsesquioxanes, organic silicon compounds.
  • Commercially available silsesquioxanes are, for example, products from the Tospearl® product group of the company. Momentive, USA, Tospearl® TSR9000 or 120S or Ganzpearl Si-020 from Ganz Chemical Co., Ltd.
  • the molding compositions optionally contain up to 1.0% by weight of white pigment.
  • Zinc oxide, zinc sulfide, barium sulfate and / or titanium dioxide are preferably present as white pigment in the novel molding materials, more preferably titanium dioxide and / or barium sulfate, particularly preferably titanium dioxide as white pigment.
  • the white pigment can only consist of one of these components or else contain one or more other white pigments from this list or selected from the group of white pigments in general. If barium sulfate is contained, the proportion of the total composition is usually 0.1 to 1.0 wt .-% barium sulfate.
  • the amount of the white pigment is preferably 0.03 to 1.0% by weight, more preferably 0.03 to 0.5% by weight, particularly preferably 0.1% by weight. Very particular preference is given to 95% by weight of the white pigment, based on the total amount of white pigment, of titanium dioxide. Titanium dioxide is most preferably the only white pigment.
  • the molding compositions may optionally contain one or more other additives other than components b) to e), as long as these do not cause the translucency to be lost.
  • additives other than components b) to e
  • the weight percentages refer to the respective total composition.
  • Typical polymer additives such as may be included as component f, are e.g. in EP-A 0 839 623, WO-A 96/15102, EP-A 0 500 496 or "Plastics Additives Handbook", Hans Zweifel, 5th Edition 2000, Hanser Verlag, Kunststoff, Germany
  • Such further additives are, for example, mold release agents, antioxidants, Flame retardants, anti-dripping agents, heat stabilizers, optical brighteners, UV absorbers and / or IR absorbers.
  • Suitable thermal stabilizers are selected from the groups of phosphates, phosphites, phosphonites and phosphines.
  • Examples are triphenyl phosphite, diphenyl alkyl phosphite, Phenyl dialkyl phosphite, tris (nonylphenyl) phosphite, trilauryl phosphite, trioctadecyl phosphite, distearyl pentaerythritol diphosphite, tris (2,4-di-tert-butylphenyl) phosphite (Irgafos® 168), diisodecylpentaerythritol diphosphite, bis (2,4-di-tert-butylphenyl) pentaerythritol diphosphite, bis (2,6-di-tert-butyl-4-methylphenyl) pentaerythritol diphosphite, bis (2,4-di-cumylphenyl) pentaerythri
  • TPP triphenylphosphine
  • Irgafos® 168 tris (2,4-di-tert-butylphenyl) phosphite
  • PEP-36 bis (2,6-di-tert-butyl-4-methylphenyl) pentaerythritol diphosphites
  • tris nonylphenyl
  • Phosphate stabilizers for the purposes of the present invention are, for example, phosphates of the formula (IV) or mixtures of these phosphates.
  • Rl independently of one another are branched alkyl radicals and / or optionally substituted aryl radicals, wherein the alkyl radical is preferably a cis to cis-alkyl, more preferably a C to C8-alkyl radical. If a phosphate stabilizer is included, it is more preferably tri (2-ethylhexyl) phosphate (triisooctyl phosphate).
  • the aryl radical is preferably substituted by C 1 to C 8 alkyl, branched C 1 to C 8 alkyl, or cumyl wherein the substituents may be the same or different, but the same substituents are preferred.
  • the aryl radicals are substituted in positions 2 and 4 or 2, 4 and 6. Very particular preference is given to tert-butyl substituents in these positions. More preferably, all Rl are the same.
  • antioxidants such as phenolic antioxidants, for example alkylated monophenols, alkylated thioalkylphenols, hydroquinones and alkylated hydroquinones.
  • Irganox® 1010 penentaerythritol-3- (4-hydroxy-3,5-di-tert-butylphenyl) propionate; CAS: 6683-19-8) and / or Irganox 1076® (2,6-dihydroxy) tert-butyl-4- (octadecanoxycarbonylethyl) phenol).
  • Irganox 1076® (2,6-di-tert-butyl-4- (octadecanoxycarbonylethyl) phenol).
  • the phosphine compounds according to the invention are used together with a phosphite or a phenolic antioxidant or a mixture of the latter two compounds.
  • the stabilizer system consists of triphenylphosphine, a mixture of triphenylphosphine and a phenolic antioxidant such as Irganox® 1076 or Irganox® 1010 and / or a combination of phenolic antioxidant and phosphite, preferably from a mixture of Irganox® 1076 or Irganox® 1010 and Irgafos® 168 or PEP-36.
  • the stabilizer system consists of a phosphine, a phosphite and a phenolic antioxidant, for example triphenylphosphine, Irganox® 1076 and Irgafos® 168.
  • Suitable mold release agents are, for example, the esters or partial esters of monohydric to hexahydric alcohols, in particular of glycerol, of pentaerythritol or of Guerbet alcohols.
  • Monohydric alcohols include stearyl alcohol, palmityl alcohol and Guerbet alcohols.
  • a dihydric alcohol is, for example, glycol; a trihydric alcohol is, for example, glycerol; tetrahydric alcohols are, for example, pentaerythritol and mesoerythritol; pentahydric alcohols are, for example, arabitol, ribitol and xylitol; Hexahydric alcohols include mannitol, glucitol (sorbitol) and dulcitol.
  • the esters are preferably the monoesters, diesters, triesters, tetraesters, pentaesters and hexaesters or mixtures thereof, in particular random mixtures of saturated, aliphatic Cio to C36 monocarboxylic acids and optionally Hydroxymonocarbon Acid, preferably with saturated, aliphatic Cu- to C32 monocarboxylic acids and optionally hydroxymonocarboxylic acids.
  • the commercially available fatty acid esters may contain ⁇ 60% of different partial esters as a result of the preparation.
  • Saturated, aliphatic monocarboxylic acids having 10 to 36 carbon atoms are, for example, capric, lauric, myristic, palmitic, stearic, hydroxystearic, arachidic, behenic, lignoceric, cerotic and montan acids.
  • Particularly suitable mold release agents as component f) of the composition according to the invention are, for example, pentaerythritol tetrastearate (PETS) or glycerol monostearate (GMS).
  • PETS pentaerythritol tetrastearate
  • GMS glycerol monostearate
  • Embodiment of the invention contains the total composition mold release agent in a proportion of 0 ppm to 3000 ppm, preferably 100 ppm to 1000 ppm, and more preferably 150 ppm to 500 ppm based on the mass of the total composition.
  • the preferred UV stabilizers as component f) of the present invention are compounds which have the lowest possible transmission below 400 nm and the highest possible transmission above 400 nm. Such compounds and their preparation are known from the literature and are described, for example, in EP-A 0 839 623, WO-A 96/15102 and EP-A 0 500 496.
  • Particularly suitable ultraviolet absorbers for use in the composition according to the invention are benzotriazoles, triazines, benzophenones and / or arylated cyanoacrylates.
  • Very particularly suitable ultraviolet absorbers are hydroxy-benzotriazoles, such as 2- (3 ', 5'-bis (l, l-dimethylbenzyl) -2'-hydroxyphenyl) benzotriazole (Tinuvin ® 234, Ciba Specialty Chemicals, Basel) , 2- (2'-hydroxy-5 '- (tert-octyl) phenyl) benzotriazole (Tinuvin ® 329, Ciba specialty Chemicals, Basel), 2- (2'-hydroxy-3' - (2-butyl) -5 '- (tert-butyl) phenyl) benzotriazole (Tinuvin ® 350, Ciba Specialty Chemicals, Basel), bis (3- (2H-benzotriazolyl) -2-hydroxy-5-tert-octyl) methane (Tinuvin ® 360, Ciba specialty Chemicals, Basel), (2- (4,6-diphenyl-l, 3,5-triazin-2
  • UV stabilizers are, for example, Tinuvin ® 360, Tinuvin ® 350, Tinuvin ® 329, Hostavin B-CAP ®, particularly preferably TIN 329 and Hostavin ® B-Cap.
  • the composition contains ultraviolet absorber in an amount of 0 ppm to 6000 ppm, preferably 500 ppm to 5000 ppm, and more preferably 1000 ppm to 2000 ppm, based on the total composition.
  • Anti-dripping agents are preferably fluorine-containing anti-dripping agents, in particular polytetrafluoroethylene.
  • Scattering additives wherein as a scattering additive in particular a silsesquioxane is contained, which is very particularly preferably the only scattering agent according to component d), e) optionally up to 1.0 wt .-%, preferably 0.03 to 1.0 wt % of at least one white pigment, preferably containing a white pigment from the group consisting of titanium dioxide and / or barium sulfate, in particular from 0.04 to 0.08% by weight of titanium dioxide, most preferably as the only white pigment,
  • the molding compositions are black with a deep gloss effect from the visual impression, the molding compositions are preferred
  • the total amount of colorants according to component b) is up to 0.1 wt .-%, c) 0.002 to 0.02 wt .-% carbon black, wherein in particular nanoscale carbon black is present as carbon black, very particularly preferably a nanoscale carbon black, extremely preferably as sole carbon black, d) 0.05 to 1, 0 wt .-%, in particular to 0.5 wt .-%, of at least one scattering additive from the group consisting of acrylate-based litter additives and / or silicone -based litter additives,
  • the molding compositions are gray with a deep gloss effect from the visual impression, the molding compositions are preferred
  • one colorant is an anthraquinone-based colorant and the other
  • Colorant is also an anthraquinone-based colorant, wherein the total amount of colorants according to component b) is up to 0.1 wt .-%,
  • the silsesquioxane is particularly preferably polymethylsilsesquioxane.
  • the three particularly preferred embodiments described above most preferably contain no further components.
  • Particularly preferred translucent molding compositions contain
  • component c and component e a colorant mixture of colorants other than component c and component e, containing at least two colorants selected from the group consisting of colorants based on anthraquinone, anthrapyridone, perinone, methine or quinoline,
  • the molding compositions, from which the molded part of the LED lighting element is made contain no further components, where the group f of the other additives from the group of mold release agents, antioxidants, flame retardants, UV absorbers, IR absorbers, anti-dripping agents, optical Brightener and / or thermal stabilizers exists.
  • Components using standard incorporation methods by combining, mixing and homogenizing, in particular the homogenization, preferably in the melt under the action of shear forces takes place.
  • the aromatic polycarbonate and optionally other components of the polycarbonate molding compound are mixed, extruded and granulated on customary melt mixing units, such as, for example, single or multi-shaft extruders or kneaders in the melt under customary conditions.
  • the additives can either be metered separately as granules or pellets via dosing scales or side feeders or even at elevated temperature as a melt by means of metering pumps at a suitable point in the solids conveying area of the extruder or in the polymer melt.
  • the masterbatches in the form of granules or pellets can also be combined with other particulate compounds Premix combined and then fed together via metering or side feeders in the solids conveying area of the extruder or in the polymer melt in the extruder.
  • the compounding unit is, for example, a twin-screw extruder, more preferably a twin-screw extruder with corotating shafts, wherein the twin-screw extruder has a length / diameter ratio of the screw shaft preferably from 20 to 44, particularly preferably from 28 to 40.
  • Such a twin-screw extruder comprises a melting and mixing zone or a combined melting and mixing zone and optionally a degassing zone at which an absolute pressure p of preferably at most 800 mbar, more preferably at most 500 mbar, particularly preferably at most 200 mbar is set.
  • the mean residence time of the mixture composition in the extruder is preferably not more than 120 s, more preferably not more than 80 s, more preferably not more than max. 60 s limited.
  • the temperature of the melt of the polymer or the polymer alloy at the outlet of the extruder is in a preferred embodiment 200 ° C to 400 ° C.
  • the molding compositions can be converted by hot pressing, spinning, blow molding, deep drawing or injection molding in appropriate moldings. For the production of the moldings according to the invention, injection molding or injection compression molding, in particular injection molding, is preferred.
  • Injection molding are known in the art and, for example, in the "manual injection molding", Friedrich Johannnab er / Walter Michaeli, Kunststoff; Vienna: Hanser, 2001, ISBN 3-446-15632-1 or in "Instructions for the construction of injection molds," Menges / Michaeli / Mohren, Kunststoff; Vienna: Hanser, 1999, ISBN 3-446-21258-2 described.
  • Injection molding here includes all injection molding processes including multi-component injection molding and injection compression molding.
  • Injection-molding processes differ from conventional injection-molding processes in that the injection and / or solidification process is performed by performing a mold plate movement.
  • the mold plates are already slightly opened before the injection process in order to compensate for the shrinkage which occurs during the later solidification and to reduce the required injection pressure. Even at the beginning of the injection process therefore a vorveriererte cavity is present. Dipping edges of the tool guarantee even with slightly open mold plates still sufficient tightness of vorveriereten cavity. The plastic mass is injected into this vorver administratrte cavity and then pressed or subsequently under execution of a tool movement in the closing direction.
  • the moldings may both be shaped as plates, as well as have a three-dimensionally shaped surface, i. a shape deviating from a plate, wherein a plate is understood to mean a body in which the three pairs of opposite sides are plane-parallel or at least approximately plane-parallel to each other.
  • the moldings preferably have a thickness of 0.5 mm to 4 mm, preferably from 1 mm to 3 mm, particularly preferably from 1.2 mm to 2 mm.
  • the thickness of the molded part is understood to be the distance of the front and rear surfaces of the molded part in its respective application, i. the thickness of the molded part refers to the distance between the two surfaces of the molded part, on whose level the viewer looks in the respective application. If the molded part does not have the same thickness at all points, which may be the case in particular with molded parts having a three-dimensionally shaped surface, the thickest point is taken into account with the thickness of the molded part.
  • the moldings are preferably coated with a scratch-resistant lacquer (hard coat) as part of a protective layer.
  • a scratch-resistant lacquer hard coat
  • This is preferably a polysiloxane varnish prepared by the sol-gel process.
  • the protective layer more preferably also contains at least one UV absorber.
  • the protective layer has a high resistance to abrasion and scratching and thus fulfills in particular the function of a scratch-resistant coating.
  • Commercially available systems are e.g. AS4000, SHC5020 and AS4700 from Momentive Performance Materials. Such systems are e.g. in US 5,041,313 A, DE 3,1213,85 AI, US 5,391,795 A and WO 2008/109072 AI described.
  • synthesis of these materials is usually carried out by condensation of alkoxy and / or alkylalkoxysilanes under acid or base catalysis.
  • nanoparticles can be incorporated.
  • Preferred solvents are alcohols such as butanol, isopropanol, methanol, ethanol and mixtures thereof.
  • the scratch-resistant coatings can be applied, for example, by dipping, spin coating, spraying or flow coating, preferably by dipping or flow methods.
  • the curing can be done thermally or by UV irradiation.
  • the scratch-resistant coating may e.g. directly or after preparation of the
  • Substrate surface with a primer are applied.
  • a scratch-resistant coating can be applied by way of plasma-supported polymerization processes, for example via a SiO 2 plasma.
  • Anti-fog or anti-reflective coatings may also be over Plasma process can be produced.
  • various additives such as UV absorbers, for example derived from triazoles or triazines, may be present.
  • the protective layer can be a single-layer or multi-layer system and thus also a combination of two or more layers.
  • the protective layer can consist of the layers of topcoat layer a 'and of primer layer a ", the primer layer being arranged between topcoat layer and substrate layer b.
  • Scratch-resistant coatings based on polysiloxane are preferably applied by dipping or flow method. Curing takes place at temperatures of 50 ° C - 140 ° C.
  • a UV absorber-containing primer to improve the adhesion of the scratch-resistant paint on the substrate layer.
  • the primer may contain further stabilizers, such as, for example, HALS systems (sterically hindered amine stabilizers), adhesion promoters and / or flow aids.
  • HALS systems sterically hindered amine stabilizers
  • adhesion promoters and / or flow aids.
  • the respective resin constituting the base material of the primer layer can be selected from a variety of materials and is, for example, in Ullmann's Encyclopedia of Industrial Chemistry, 5 th Edition, Vol. AI 8, pp. 368-426, VCH, Weinheim 1991. It is possible to use polyacrylates, polyurethanes, phenol-based, melamine-based, epoxy and alkyd systems or mixtures of these systems.
  • the resin is usually dissolved in suitable solvents - often in alcohols.
  • curing may be at room or elevated temperatures. Preferably, temperatures between 50 ° C and 140 ° C are used - often after a large part of the solvent has been briefly removed at room temperature.
  • Commercially available primer systems include SHP470, SHP470-FT2050 and SHP401 from Momentive Performance Materials. Such coatings are described, for example, in US Pat. No. 6,350,512 Bl, US Pat. No. 5,869,185 A, EP 1308084 A1 and WO 2006/108520 A1.
  • the protective layer comprises a
  • UV absorber from the group of benzophenones, resorcinols, 2- (2-hydroxyphenyl) -bentriazoles, hydroxyphenyl-s-triazines, 2-cyanoacrylates,
  • the organo-modified silane is, for example, a methyltrialkoxy or dimethyldialkoxysilane; and optionally, in a further preferred embodiment, additionally a primer layer (layer a ") which acts as an adhesion promoter between the polysiloxane-based scratch-resistant coating and the substrate layer, comprising at least one UV absorber from the group of the benzophenones, arranged on the substrate layer of the molding compound according to the invention.
  • resorcinols 2- (2-hydroxyphenyl) -bentriazoles, hydroxyphenyl-s-triazines, 2-cyanoacrylates, oxalanilides and / or sterically hindered amines (HALS), in particular based on 2,2,6,6-tetramethylpiperidine and derivatives thereof, wherein the thickness of the primer layer 0.3 ⁇ to 8 ⁇ , preferably 1, 1 ⁇ ⁇ 8 4.0 ⁇ , is.
  • HALS sterically hindered amines
  • the protective layer comprises no further layers.
  • derivatives are understood as meaning those compounds whose molecular structure at the site of an H atom or a functional group has another atom or another atomic group or in which one or more atoms / atomic groups have been removed recognizable.
  • the polysiloxane preferably contains silicon-organic compounds of the formula R n n SiX4-, and / or partial condensates thereof, where the radicals R are identical or different and stand for a linear or branched, saturated or mono- or polyunsaturated or aromatic hydrocarbon radical, the radicals X are the same or different and are hydrolyzable groups or hydroxyl groups, preferably halogen, in particular chlorine or bromine, alkoxy groups, alkylcarbonyl groups or acyloxy groups and n is 0, 1, 2 or 3, preferably 1 or 2, very particularly preferably 1.
  • R is preferably saturated, branched or unbranched alkyl radicals having 1 to 20 carbon atoms and / or mono- or polyunsaturated branched or unbranched alkenyl radicals having 2 to 20 carbon atoms or aromatic groups having 6 to 12 carbon atoms. More preferably, the alkyl or alkenyl radicals have up to 12, more preferably up to 8 carbon atoms. Most preferably, all radicals are methyl and / or phenyl.
  • X is particularly preferably an alkoxy group, very particularly preferably a C 1 to C 1 -alkoxy group, for example a methoxy or an ethoxy group.
  • the silicon compounds R n SiX4- n X are hydrolyzable via the radicals and condensable. These hydrolytically condensable groups form an inorganic network with Si-O-Si. Units built.
  • the radicals R are stable to hydrolysis under the usual condensation conditions, in contrast to the radicals X.
  • dry film thicknesses of 3 ⁇ m-20 ⁇ m are preferred, more preferably 5 ⁇ m-15 ⁇ m, particularly preferably 6 ⁇ m-12 ⁇ m.
  • dry film thickness is meant here the layer thickness of the paint after application and subsequent evaporation of the solvent and subsequent thermal or UV curing.
  • UV-curable coating systems are UVT 610 and UVT 820 Redspot.
  • the application of the protective layer via the flood process since it leads to coated parts with high optical quality.
  • the flood process can be done manually with hose or suitable coating head or automatically in the run on flood painting robot and possibly slot nozzles.
  • Other possible application methods are dipping, knife coating, rolling, spraying or spin coating.
  • the components, both hanging and stored in a corresponding product carrier, can be coated.
  • the part to be coated is suspended or placed in a suitable goods carrier.
  • the coating can also be performed by hand.
  • the liquid to be coated primer or lacquer solution to form the protective layer e is poured from the upper edge of the hardware in the longitudinal direction over the plate, while the starting point of the paint on the plate from left to right over the plate width is performed.
  • the painted panels are ventilated and hardened vertically hanging on a clamp according to the respective manufacturer's specifications.
  • the LED lighting elements can be used in particular where a day / night design is required, ie in particular for interior applications, in particular in buildings and motor vehicles, particularly preferably in automobiles.
  • the preferred black or gray molded parts show without penetration with LED light from the back of a deep gloss.
  • the molded parts of LED light radiating from an LED light source on the back of the molding, is depending on the thickness of the molding and type of LED light rather a bright glow in the respective color of the LED light or a corresponding colored surface recognizable.
  • a white LED for example, with a plate thickness of 1 mm bright, rather white LED light can be seen, while at a thickness of 2 mm, the surface is apparently colored gray.
  • red, green and / or blue light it has the appearance that a red, green or blue colored translucent plate is irradiated with a 1 mm thick plate, although the plate in the non- lit state shows a black or gray deep-gloss effect.
  • the molded part is on the back, i. on the side from which the molded part is irradiated with LED light, printed, for example by means of screen printing.
  • This allows graphic elements - logos, logos, pictorial representations, etc. - to be integrated into the day / night design.
  • Particularly preferred is the part that should light up when irradiated by LED light, unprinted.
  • the element to be displayed is marked accordingly by a negative pressure.
  • the lettering "Covestro” can be represented by the fact that the back side of the molding is completely printed down to the letters with ink that is impermeable to the respective LED light or not significantly transparent, so that the LED light only reaches it at the position of the letters through the molding, so that the lettering lights up when the lighting of the LED lighting unit is switched on, whereby the area printed on the back side looks similar to the day design in the night design.
  • LED light is preferably understood as meaning light which has a radiation characteristic in which more than 70% of the radiation in the range from 100 nm to 3000 nm emitted intensity in the visible range (in the context of the present invention, the visible range is defined as the wavelength range of 360 nm to 780 nm) is located. In particular, less than 5% of the intensity is in the range of ⁇ 360 nm.
  • the LED light in the present invention preferably has a dominant wavelength (local maximum) between 360 nm and
  • 480 nm more preferably between 400 nm to 480 nm, and more preferably between 430 nm and 470 nm (limits included).
  • LED light preferably has a local maximum in the range between 360 nm and 480 nm, which has a narrow emission width with a maximum half-value width of 60 nm, more preferably of at most 45 nm, even more preferably of max. 30 nm, with monochromatic light being particularly preferred
  • the LED light preferably has a local maximum
  • LED light emitting diode
  • OLED organic LED
  • electroluminescent films Such emission characteristics are achieved, inter alia, by the use of semiconductors or lasers as the light source.
  • Semiconductor technology is already widely used today, for example in LED (light emitting diode), organic LED (OLED) and electroluminescent films.
  • the compounding was carried out on a twin-screw extruder from KrausMaffei Berstorff, type ZE ZE 25, at a housing temperature of 260 ° V or a melt temperature of 270 ° C and a speed of 100 rpm at a rate of 10 kg / h with those specified in the examples Quantities of components.
  • the pattern plates of different thicknesses were illuminated with RGB LED light from the back to create a night design. While the day-design had a dark, deep-luster effect, the light and its color were clearly visible when the backlight was illuminated with LED light. Sample platelets which, in addition to the injection-molded molding compound, still had a printed ink layer in some areas of a color that was not transparent (significantly transparent) for the respective LED light, shone only in the unprinted areas due to the LED light irradiated from behind ,

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EP18739875.5A 2017-07-24 2018-07-19 Led-beleuchtungselemente mit formteilen aus transluzenten polycarbonat-zusammensetzungen mit tiefenglanzeffekt Withdrawn EP3658613A1 (de)

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CN110892014A (zh) 2020-03-17
WO2019020478A1 (de) 2019-01-31
CN110892014B (zh) 2022-11-08
TW201920464A (zh) 2019-06-01
KR20200035019A (ko) 2020-04-01
US11598495B2 (en) 2023-03-07
US20200173616A1 (en) 2020-06-04
KR102557663B1 (ko) 2023-07-20

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