EP4323469A1 - Produits plastiques contenant des luminophores - Google Patents

Produits plastiques contenant des luminophores

Info

Publication number
EP4323469A1
EP4323469A1 EP22717157.6A EP22717157A EP4323469A1 EP 4323469 A1 EP4323469 A1 EP 4323469A1 EP 22717157 A EP22717157 A EP 22717157A EP 4323469 A1 EP4323469 A1 EP 4323469A1
Authority
EP
European Patent Office
Prior art keywords
plastic product
phosphor
product according
group
plastic
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.)
Pending
Application number
EP22717157.6A
Other languages
German (de)
English (en)
Inventor
Matthias Naumann
Kathrin Lehmann
Simone SCHULTE
Christina Janke
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.)
Evonik Operations GmbH
Original Assignee
Evonik Operations GmbH
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 Evonik Operations GmbH filed Critical Evonik Operations GmbH
Publication of EP4323469A1 publication Critical patent/EP4323469A1/fr
Pending legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
    • C09K11/00—Luminescent, e.g. electroluminescent, chemiluminescent materials
    • C09K11/08—Luminescent, e.g. electroluminescent, chemiluminescent materials containing inorganic luminescent materials
    • C09K11/77—Luminescent, e.g. electroluminescent, chemiluminescent materials containing inorganic luminescent materials containing rare earth metals
    • C09K11/77062—Silicates
    • 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
    • C08K3/34—Silicon-containing compounds
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L23/00—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers
    • C08L23/02—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers not modified by chemical after-treatment
    • C08L23/10—Homopolymers or copolymers of propene
    • C08L23/12—Polypropene
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L67/00—Compositions of polyesters obtained by reactions forming a carboxylic ester link in the main chain; Compositions of derivatives of such polymers
    • C08L67/06—Unsaturated polyesters
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
    • C09K11/00—Luminescent, e.g. electroluminescent, chemiluminescent materials
    • C09K11/02—Use of particular materials as binders, particle coatings or suspension media therefor
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
    • C09K11/00—Luminescent, e.g. electroluminescent, chemiluminescent materials
    • C09K11/08—Luminescent, e.g. electroluminescent, chemiluminescent materials containing inorganic luminescent materials
    • C09K11/77—Luminescent, e.g. electroluminescent, chemiluminescent materials containing inorganic luminescent materials containing rare earth metals
    • C09K11/7766—Luminescent, e.g. electroluminescent, chemiluminescent materials containing inorganic luminescent materials containing rare earth metals containing two or more rare earth metals
    • C09K11/77742—Silicates
    • 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
    • C08K3/10—Metal compounds
    • C08K3/11—Compounds containing metals of Groups 4 to 10 or of Groups 14 to 16 of the Periodic Table

Definitions

  • the invention relates to plastic products that contain a luminophore with antimicrobial properties and a plastic, and articles that contain these
  • Plastic products include and / or are made from it.
  • microorganisms such as bacteria, fungi and viruses. Many of these microorganisms are useful or even necessary. Nevertheless, in addition to the more harmless representatives, there are also disease-causing or even deadly bacteria, fungi and viruses.
  • Microorganisms can be transmitted through daily contact with other people and contact with objects that others have used.
  • the antimicrobial finish of surfaces is particularly important in hygiene-sensitive areas.
  • Plastic composition shows an antimicrobial effect.
  • the action of the composition is based on the release of the antimicrobial agent from the surface of the plastic composition into the environment. Even if the release rate is intended to be low, the release of the antimicrobial agent can endanger people and the environment.
  • WO 2009/013016 A1 describes antimicrobial plastic products which contain silver orthophosphate or particles of partially reduced silver orthophosphate as the antimicrobially active component.
  • the antimicrobial activity is believed to be due to the release of surface silver cations.
  • the plastic used should have a low silver release plateau in order to avoid toxic effects. Even if the release rate is intended to be low, the release of the antimicrobial agent can endanger humans and the environment.
  • titanium dioxide particles or other semiconductor particles with a matching band gap can produce antimicrobial agents when exposed to light. This exploits the fact that these particles generate radicals from atmospheric oxygen and (air) moisture under the influence of light with a wavelength that matches the band gap of the particles. These radicals can then diffuse to the bacteria or viruses and render them harmless through radical reactions. Here, the radicals generated represent the antimicrobial agents. Here, too, antimicrobial agents are released, which pose a risk to humans and environment can lead. Furthermore, titanium dioxide particles have recently been classified as "probably human carcinogenic", especially when inhaled.
  • dyes can produce antimicrobial agents. These are dyes that, when exposed to light of a suitable wavelength, can assume an electronically excited state by absorbing the energy of a photon. This energy can then be transferred from the dye molecule to a triplet oxygen molecule ( 3 Ü2) when it comes into contact with atmospheric oxygen, which then changes to an electronically excited singlet state.
  • the resulting singlet oxygen ( 1 Ü2) is a strong oxidizing agent that can kill bacteria or viruses if they come into contact with them.
  • the generated singlet oxygen ( 1 02) represents the antimicrobial agent.
  • polycyclic, aromatic dyes are used for this, which are more resistant to oxidation than other organic dyes. Again, a chemical effect on contact with the microorganisms is used to kill them.
  • the semiconductor particles and dyes mentioned above have at least two major disadvantages when embedded in a plastic matrix.
  • the active species that they can generate must leave the plastic matrix in order to come into contact with the microorganisms, which they can then kill. In this way, a chemical and not a purely physical path is taken again, on which the microorganisms are then killed. Therefore, such materials fall under the Biocidal Products Regulation (Regulation (EU), No. 528/2012 of the European Parliament and of the Council of 22 May 2012 in the current version of 2019).
  • the second disadvantage is the simple fact that such materials, when embedded in a plastic matrix, require diffusion processes to generate the antimicrobial agents.
  • 3 Ü2 must diffuse into the plastic matrix in order to reach the dye and 1 Ü2 must in turn diffuse out of the plastic matrix in order to be able to interact with the microorganisms.
  • the radicals generated by the semiconductor materials here, in addition to oxygen, water must also diffuse through the matrix.
  • the antimicrobial agents i.e. the radicals generated, then chemically interact/react with the plastic matrix and are therefore ineffective for killing the microorganisms.
  • the plastic matrix is damaged as a result. It is also known to use physical methods and thus to get by without antimicrobial agents.
  • UV radiation in medicine or in hygiene, for example to disinfect water, gases or surfaces.
  • UV radiation has long been used in drinking water treatment to reduce the number of potentially pathogenic microorganisms in the water.
  • UV-C radiation also referred to as UVC radiation
  • UV-C radiation in the wavelength range between 100 nm and 280 nm is preferably used here.
  • the use of electromagnetic radiation with different wavelengths should take into account the different absorption of the different proteins, the amino acids or nucleic acids contained in microorganisms, tissues or cells (eg in DNA or RNA) as well as peptide bonds between the individual acids.
  • DNA/RNA absorbs electromagnetic radiation well within the wavelength range between 200 nm and 300 nm and particularly well between 250 nm and 280 nm, so that this radiation is particularly suitable for inactivating DNA/RNA.
  • Pathogenic microorganisms viruses, bacteria, yeasts, molds, etc.
  • duration and intensity of the radiation can therefore be inactivated with such radiation.
  • Irradiation can destroy the structure of DNA or RNA.
  • metabolically active cells can be inactivated and/or their ability to reproduce can be eliminated.
  • the advantage of exposure to UV light is that the microorganisms cannot develop any resistance to it.
  • these physical methods require special equipment and usually have to be repeated regularly by trained personnel, which makes it difficult for these methods to be used widely.
  • phosphor particles are used with which electromagnetic radiation with wavelengths above UV light, in particular visible light or infrared light, can be converted into electromagnetic radiation with a shorter wavelength, so that the emission of UV-C radiation can be achieved by the individual phosphor particles .
  • Phosphors that show an up-conversion could achieve an antimicrobial effect by means of UV-C radiation without generating antimicrobial active ingredients.
  • the disadvantages outlined above, which are associated with antimicrobial agents, could be overcome with suitable phosphors.
  • WO 2009/064845 A2 describes a composition for converting electromagnetic energy into UV-C radiation or electromagnetic radiation of a shorter wavelength, the composition comprising: at least one phosphor capable of converting an initial electromagnetic energy (A) into a to convert different electromagnetic energy (B), wherein the different electromagnetic energy (B) comprises UV-C, X-ray or gamma radiation; and an organic or inorganic medium containing the phosphor.
  • Plastic resins among others, are described as organic media.
  • the concept of using phosphors that have the property of up-conversion and emit UV-C radiation and are therefore intended to have a sterilizing effect is disclosed in principle in WO 2009/064845 A2.
  • WO 2009/064845 A2 does not represent an executable teaching, but is purely conceptual. In particular, no concrete example is given. Furthermore, it has been shown that the “phosphors” which, according to WO 2009/064845 A2, are to be produced at a temperature of 1800° C. to 2900° C. are in reality amorphous and glass-like products which do not exhibit any up-conversion. In addition, of the numerous UV phosphors described, only a few are potentially capable of emitting UV radiation in a wavelength (UV-C radiation) such that an antimicrobial effect is even conceivable.
  • UV-C radiation UV-C radiation
  • Plastic products that show an antimicrobial effect without releasing antimicrobial agents are not known from the prior art.
  • the object of the present invention was therefore to provide a plastic product and objects made from it, which overcome at least one disadvantage of the prior art.
  • the object of the present invention was to provide plastic products and objects made from them that exhibit an antimicrobial effect without the release of an antimicrobial agent being necessary for this.
  • Other tasks that are not explicitly mentioned result from the overall context of the following description, examples and claims.
  • plastic products can have an antimicrobial effect even without releasing an antimicrobial agent if they contain special phosphors as described in the claims.
  • a first subject of the present invention is therefore a plastic product containing at least one plastic and at least one phosphor of the general formula (I) Ai-xy-zB*yB 2 SiO 4 :Ln 1 x,Ln 2 z (I) where:
  • A is selected from the group consisting of Mg, Ca, Sr and Ba;
  • B is selected from the group consisting of Li, Na, K, Rb and Cs;
  • B* is selected from the group consisting of Li, Na and K;
  • B B* or BF B*, preferably BF B*;
  • Ln 1 is selected from the group consisting of praseodymium (Pr), erbium (Er), and neodymium (Nd);
  • the plastic products according to the invention have the advantage over the plastic products of the prior art that their antimicrobial effect is based on a purely physical principle of action and is not based on the release of antimicrobial active ingredients.
  • the plastic product contains a plastic composition that contains the at least one plastic and the at least one phosphor.
  • a plastic product which comprises or consists of a plastic composition, the plastic composition having at least one plastic and at least one phosphor of the general formula (I)
  • A is selected from the group consisting of Mg, Ca, Sr and Ba; B is selected from the group consisting of Li, Na, K, Rb and Cs;
  • B * is selected from the group consisting of Li, Na and K;
  • B B * or BFB * , preferably BFB * ;
  • the phosphor is at least partially crystalline. It is thus preferred that the phosphor is partially or fully crystalline. Preferably the phosphor is so at least not completely amorphous. It is therefore preferred that the phosphor is not an amorphously solidified melt (glass).
  • the phosphor is preferably a crystalline silicate or a crystalline silicate doped with lanthanide ions, comprising at least one alkali metal ion and/or at least one alkaline earth metal ion.
  • the crystalline silicate is particularly preferably doped with praseodymium and optionally co-doped with gadolinium.
  • the phosphor is preferably selected from compounds of the general formula (Ia)
  • A is selected from the group consisting of Mg, Ca, Sr and Ba;
  • B is selected from the group consisting of Li, Na, K, Rb and Cs;
  • B* is selected from the group consisting of Li, Na and K;
  • B* serves to equalize the charge on the silicate anions.
  • A can stand for (Cao , Sro ,i ) for example. It is preferred that the phosphor is selected from compounds of general formula (II)
  • Formula (II) can also be written as formula (Cai- a Sr a )i- 2b Li 2 Si0 4 :Ln b Na b .
  • Ln 1 is used for doping.
  • Praesodymium is preferably used for the doping.
  • Ln 2 is used for optional co-doping.
  • Gadolinium is preferably used for the optional co-doping.
  • the phosphor is not co-doped, ie Ln is preferably a single element from the group consisting of praseodymium, gadolinium, erbium and neodymium.
  • the phosphor is a compound of the formula CaLhSiO ⁇ Pr.Na, such as CaLi 2 SiO 4 : Pr,Na(1%).
  • the phosphor is selected from compounds of the general formula (IIa)
  • Cai-2bPr NabLi2SiO4 (IIa) with b 0.0001 to 1, preferably 0.0001 to 0.1, in particular 0.005 to 0.015.
  • Formula (IIa) can also be written as formula Cai.2 b Li2 SiO4 :Pr b Na b .
  • the phosphor is a compound of the formula Cao,9e Pro,oi Nao,oi Li2SiO4. It should be noted here that the phosphors required for the present invention are disclosed in patent applications EP 19202910.6 and PCT/EP2020/077798.
  • the phosphor is preferably a phosphor which, when irradiated with electromagnetic radiation with lower energy and longer wavelength in the range from 2000 nm to 400 nm, preferably in the range from 800 nm to 400 nm, generates electromagnetic radiation with higher energy and shorter wavelength in the range from 400 nm to 100 nm, preferably in the range from 300 nm to 200 nm. It is further preferred that the intensity of the emission maximum of the electromagnetic radiation with higher energy and shorter wavelength is at least 1-10 3 counts/(mm 2 -s), preferably higher than 1 10 4 counts/(mm 2 -s), particularly preferably higher than 1 10 5 counts/(mm 2 -s). To determine these parameters, the emission is preferably excited by means of a laser, in particular a laser with a power of 75 mW at 445 nm and/or a power of 150 mW at 488 nm.
  • the phosphor in particular the phosphor of the formula (I), formula (Ia), formula (II) and formula (IIa), preferably has XRPD signals in the range from 23° 2Q to 27° 2Q and from 34° 2Q to 39.5° 2Q, with the signals preferably being determined using the Bragg-Brentano geometry and the Cu-Ka radiation. Details of the measurement method can be found in patent applications EP 19202910.6 and PCT/EP2020/077798.
  • lanthanide salt selected from lanthanide nitrates, lanthanide carbonates and lanthanide carboxylates, preferably from lanthanide acetates, lanthanide sulfates and lanthanide oxides, particularly preferably PreO-n and/or Gd203, the lanthanide ions in the lanthanide oxides or lanthanide salts being selected from praseodymium, gadolinium, erbium and neodymium and for the co-doping at least two of them,
  • a silicate preferably a silicate salt, particularly preferably an alkali metal salt of the silicate, - iii) providing at least one alkaline earth metal salt and at least one alkali metal salt, preferably an alkali metal silicate selected from a lithium salt or a lithium compound and optionally selected from a sodium salt and potassium salt, wherein preferably the lithium salt is a lithium silicate, - a) mixing i), ii) and iii ) by grinding to obtain a mixture, or
  • step 1a) mixing i), ii) and iii) in an organic polar or non-polar solvent other than a protic solvent to obtain a mixture; the mixture from b) is calcined (step 1a) at 600° C. to 1000° C. to remove the organic component, preferably the calcination is carried out at 600° C. to 1000° C. for at least 1 hour, preferably more than or equal to 2 hours, under normal (air) atmosphere to obtain a calcined mixture,
  • step 1b a further calcination step (step 1b) at a temperature from 50 to 200 °C for at least 3 h, preferably under air, below the melting temperature of the silicate-based material to crystallize the silicate-based material, preferably at a temperature of 800 to 900 °C, more preferably at about 850 °C, for at least 3 h, preferably for at least 12 h, preferably under air,
  • step 2 In a further calcination step at increasing temperature, preferably above 800° C. and 50 to 200° C. below the melting point (step 2) of the material, for example at 850° C. for at least 3 h, particularly preferably for at least 6 h, under a reduced atmosphere , where the lanthanides are reduced to Ln 3+ ions, - Obtaining a silicate-based lanthanide ion-doped material, preferably after cooling the material.
  • the phosphors according to EP 19202910.6 and PCT/EP2020/077798 have the required up-conversion property, which is responsible for the antimicrobial effect.
  • These phosphors can therefore convert electromagnetic radiation with a wavelength above UV light, in particular visible light or infrared light, into electromagnetic radiation with a lower wavelength Convert wavelengths in the range in which, for example, the DNA or RNA of the microorganisms can be destroyed. Accordingly, these phosphors are very well suited for the plastic product according to the invention. It is also conceivable to produce the phosphor according to the invention as follows:
  • the starting materials used are CaC03 (Alfa Aesar, 99.5%), U 2 CO 3 (Alfa Aesar, 99%), S1O 2 (Aerosil 200, Evonik), RGQOII (Treibacher, 99.99%), and Na 2 CÜ 3 (Merck, 99.9%) used.
  • a stoichiometric mixture of these compounds is mixed in acetone for 30 minutes. After the acetone has completely evaporated at room temperature, the mixture is transferred to a corundum crucible. The mixture is calcined twice. The first calcination is carried out in a melting furnace at 850°C for 12 hours with air supply and the second calcination at 850°C for 6 hours under 95/5 N2/H2.
  • the end product is then ground in an agate mortar. It is preferred that the production of the phosphor is carried out below the melting temperature of the siliceous materials used and obtained, in particular below the melting temperature of the phosphor obtained. In particular, it is preferred that a temperature of 1000° C. is not exceeded during the production of the phosphor. This avoids the formation of an amorphously solidified melt as the end product of the production process and thus enables the formation of an at least partially crystalline phosphor as the end product of the process.
  • the phosphor has a particle size d50 of from 0.1 to 100 ⁇ m, preferably from 0.1 to 10 ⁇ m, in particular from 0.1 to 5 ⁇ m.
  • the particle size is preferably measured according to ISO 13320:2020 and/or DSP 429, for example using a device from Horiba, LA-950 Laser Particle Size Analyzer.
  • various additives can preferably be added.
  • the mass fraction of the total amount of all phosphors from 0.02% to ⁇ 50.00%, preferably from 0.05% to 10.00%, in particular from 1.00% to 7.00% based on the Total mass of the plastic product is. It is also preferred that the phosphor is embedded in the plastic. It is therefore preferred that the phosphor is partially or completely embedded in the plastic. It is therefore preferred that the plastic forms a matrix for the phosphor. It is particularly preferred that the phosphor is dispersed in the plastic. It is therefore particularly preferred that the phosphor is partially or completely dispersed in the plastic. The phosphor is therefore preferably present as a particulate solid in the plastic.
  • the phosphor is therefore preferably present as a particulate solid in the plastic, partially or completely dispersed.
  • the plastic product according to the invention also contains at least one plastic.
  • all plastics known from the prior art can be used, provided they allow the light to pass through sufficiently in the spectral ranges that are important for excitation and emission. Suitable plastics and methods for their selection are known to those skilled in the art.
  • the at least one plastic is selected from the group consisting of thermoplastics and duroplastics, preferably thermoplastics.
  • Thermoplastics are polymers that have a flow transition range above the service temperature.
  • Thermoplastics are linear or branched polymers which in principle become flowable above the glass transition temperature (Tg) in the case of amorphous thermoplastics and above the melting point (Tm) in the case of (partly) crystalline thermoplastics. In the softened state, they can be processed into shaped parts by pressing, extrusion, injection molding or other shaping processes. The mobility of the chains is so great that the polymer molecules slide easily on each other and the material reaches the molten state (flow range, polymer melt).
  • the thermoplastics also include thermoplastically processable plastics with pronounced entropy-elastic properties, the so-called thermoplastic elastomers.
  • Thermoplastics include all plastics consisting of linear or thermolabile crosslinked polymer molecules, for example polyolefins, vinyl polymers, polyesters, polyacetals, polyacetates, polycarbonates, sometimes also polyurethanes and ionomers but also TPEs - thermoplastic elastomers (R ⁇ MPP ONLINE, Vers. 4.0, Carlowitz u Wierer, Kunststoffe (instructions), Chapter 1 Thermoplastics, Berlin: Springer Verlag (1987), Domininghaus, p. 95 ff).
  • plastics consisting of linear or thermolabile crosslinked polymer molecules, for example polyolefins, vinyl polymers, polyesters, polyacetals, polyacetates, polycarbonates, sometimes also polyurethanes and ionomers but also TPEs - thermoplastic elastomers (R ⁇ MPP ONLINE, Vers. 4.0, Carlowitz u Wierer, Kunststoffe (instructions), Chapter 1 Thermoplastic
  • thermoplastic is selected from the group consisting of acrylonitrile butadiene styrene (ABS), polyamide (PA), polylactate (PLA), poly(alkyl)(meth)acrylate, Polymethyl methacrylate (PMMA), polycarbonate (PC), polyethylene terephthalate (PET), polyethylene (PE), polypropylene (PP), polystyrene (PS), polyether ether ketone (PEEK), polyvinyl chloride (PVC), cycloolefin polymers (COP, cycloolefin copolymers (COP), and thermoplastic elastomers (TPE), where the thermoplastic elastomers are preferably selected from the group consisting of thermoplastic polyamide elastomers (TPA, TPE-A), thermoplastic copolyester elastomers (TPC, TPE-E), thermoplastic elastomers based on olefins (TPO), acrylonitrile butadiene styren
  • (meth)acrylic stands for “methacrylic” and/or “acrylic” and the expression “poly(alkyl)(meth)acrylate” for a homo- or copolymer of (meth)acrylic acid alkyl esters and optionally further monomers.
  • the plastic is selected from the group consisting of duroplastics.
  • Thermosets are plastics that are formed from irreversible and close-meshed crosslinking via covalent bonds from oligomers (technically: prepolymers), more rarely from monomers or polymers.
  • Duroplast is used both for the raw materials before crosslinking (see reaction resins) and as a collective term for the cured, mostly completely amorphous resins.
  • Thermosetting plastics are steel-elastic at low temperatures, and even at higher temperatures they cannot flow viscous, but behave elastically with very limited deformability.
  • Thermosetting plastics include the technically important substance groups of diallyl phthalate resins (DAP), epoxy resins (EP), urea formaldehyde resins (UF), melamine formaldehyde resins (MF), melamine phenol formaldehyde resins (MPF). ), phenol formaldehyde resins (PF), vinyl ester resins (VE) and unsaturated polyester resins (UP, UPES) (R ⁇ MPP ONLINE, Vers. 3.7, Becker, GW; Braun, D.; Woebcken, W nearly Kunststoff- Handbuch, Volume 10: Thermosets, 2nd edition; Hanser: Kunststoff, (1988); Elias (6.) 1, 7, 476 ff.).
  • DAP diallyl phthalate resins
  • EP epoxy resins
  • UF urea formaldehyde resins
  • MF melamine formaldehyde resins
  • MPF melamine phenol formaldehyde resins
  • PF phenol formaldeh
  • thermoset is selected from the group consisting of diallyl phthalate resins (DAP), epoxy resins (EP), urea-formaldehyde resins (UF), melamine-formaldehyde resins (MF ), melamine-phenol-formaldehyde resins (MPF), phenol-formaldehyde resins (PF), unsaturated polyester resins (UP, UPES), vinyl ester resins (VE) and polyurethanes (PU).
  • DAP diallyl phthalate resins
  • EP epoxy resins
  • UF urea-formaldehyde resins
  • MF melamine-formaldehyde resins
  • MPF melamine-phenol-formaldehyde resins
  • PF unsaturated polyester resins
  • UP UPES
  • VE vinyl ester resins
  • PU polyurethanes
  • the plastic is preferably essentially free or completely free of aromatic groups, C-C double bonds and C-C triple bonds, the latter applying to the state of the plastic after curing, i.e. to the state of the plastic as it is preferably present as a component of the plastic product.
  • the person skilled in the art is familiar with the physical interactions of light with a material and its material surface. Depending on the material and its material surface, a variety of effects occur when the light hits it. Some of the incident light is absorbed, some is reflected and possibly also scattered. Light can also be first absorbed and then emitted again. In the case of opaque, semi-transparent or translucent materials, the light can also penetrate through the body (transmission). The material can be transparent or translucent. In some cases, the light is even polarized or diffracted at the surface. Some objects can even emit light (illuminated displays, LED segments, displays), fluoresce in a different color of light, or phosphorescent (afterglow).
  • the plastic is preferably low-resonance.
  • low-resonance means that the plastic has low absorption, reflection, remission and scattering.
  • the transmission should preferably be pronounced.
  • Plastics that are low-resonance show an improved antimicrobial effect, due to the fact that more electromagnetic radiation with lower energy and higher wavelength in the range from 2000 nm to 400 nm, especially in the range from 800 nm to 400 nm, is let through by the plastic and as a result from this, in turn, more electromagnetic radiation with higher energy and shorter wavelength in the range from 400 nm to 100 nm, preferably in the range from 300 nm to 200 nm, can be emitted.
  • the transmission of the plastic is preferably at least 60%, preferably at least 65% and particularly preferably at least 70%, measured at a
  • Wavelength of 260 nm and a material thickness of preferably 100 m ⁇ ti The transmission of the plastic is preferably at least 60%, preferably at least 65% and particularly preferably at least 70%, measured at a
  • transmission as stated above is a sufficient but not a necessary criterion for the suitability of the plastic.
  • those plastics can also be suitable that have a low transmission, provided they only scatter the light. This can be the case with semi-crystalline or crystalline plastics. It is therefore more relevant for the antimicrobial effect to develop that the radiation is not absorbed by the plastic.
  • the wavelengths of 260 nm were selected as an example for the emitted wavelength and 500 nm as an example for the excitation wavelength, which are responsible on the one hand for the up-conversion and on the other hand significantly for the antimicrobial effect.
  • the transmission is preferably determined as described in the examples.
  • the transmission is therefore preferably measured with a "Specord 200 Plus" UVA IS double-beam spectrometer from Analytik Jena.
  • An internal wavelength calibration is carried out with a holmium oxide filter.
  • the samples are irradiated with monochromatized light from a deuterium (UV range) or a tungsten-halogen lamp (visible range).
  • the spectral bandwidth is 1.4 nm.
  • the monochromatized light is divided into a measuring and a reference channel and enables direct measurement against a reference sample.
  • the radiation transmitted through the sample is detected and processed by a photodiode.
  • the material thickness (layer thickness) of the sample is preferably 100 ⁇ m.
  • the plastics are preferably selected in such a way that the plastic product according to the invention has high chemical and mechanical resistance.
  • the chemical and mechanical resistance is particularly important since antimicrobial Plastic products are often used in areas that require regular disinfection and other hygiene measures.
  • the mass fraction of the total amount of all plastics is >50.00% to 99.98%, preferably from 90.00% to 99.95%, in particular from 93.00% to 99.00% based on the total mass of the plastic product according to the invention is.
  • the plastic product further additives selected from the group consisting of colorants such as pigments or dyes, light and UV stabilizers such as Hindered Amine Light Stabilizers (HALS), heat stabilizers, UV absorbers, where UV-C -absorbing materials are excluded, IR absorbers, inorganic or organic flame retardants, thermal stabilizers, antioxidants, crosslinking additives and polymers, fiber-reinforcing additives on an organic or inorganic basis, such as cellulose, flax, bamboo, glass or carbon fibers, antistatic additives , impact modifiers, odor absorbers, additives and polymers for improved barrier properties, inorganic and organic fillers and auxiliaries.
  • HALS Hindered Amine Light Stabilizers
  • UV absorbers where UV-C -absorbing materials are excluded
  • IR absorbers inorganic or organic flame retardants
  • thermal stabilizers antioxidants
  • crosslinking additives and polymers such as cellulose, flax, bamboo, glass or carbon fibers
  • the plastic product does not contain any antimicrobial agents.
  • care must be taken to ensure that the antimicrobial effect of the phosphors is not impaired.
  • care must be taken to ensure that the radiation required to excite the phosphors and the UV-C radiation emitted by the phosphors is not absorbed to such an extent that that the antimicrobial effect is prevented.
  • the plastic compositions according to the invention preferably contain the above-mentioned further additives in a mass fraction of at most 10%, preferably at most 5% and in particular at most 2%.
  • the plastic product according to the invention preferably has an antimicrobial effect against bacteria, yeasts, moulds, algae, parasites and/or viruses.
  • an "antimicrobial effect" of a plastic product means that the plastic product inhibits the growth and/or multiplication of microorganisms limited or prevented.
  • the microorganisms include unicellular or multicellular, DNA or RNA-based, prokaryotic or eukaryotic microorganisms as well as reproductive, infectious organic structures (viruses, virions and virusoids, viroids), with active or inactive (dormant) metabolism as well without metabolism.
  • the antimicrobial effect can be chemical (material) or physical (radiation, heat, mechanical effects) in nature.
  • Pathogens of nosocomial infections preferably against Enterococcus faecium, Staphylococcus aureus, Klebsiella pneumoniae, Acinetobacter baumannii, Pseudomonas aeruginosa, Escherichia coli, Enterobacter, Corynebacterium diphteria, Candida albicans, rotaviruses, bacteriophages; Facultatively pathogenic environmental organisms, preferably against Cryptosporidium parvum, Giardia lamblia, amoebas ( Arcanthamoeba spp., Naegleria spp.), E.
  • enteric viruses e.g. polio and hepatitis A virus
  • Pathogens in food preferably against Bacillus cereus, Campylobacter spp., Clostridium botulinum, Clostridium perfringens, Cronobacter spp., E. coli, Listeria monocytogenes, Salmonella spp., Staphylococcus aureus, Vibrio spp., Yersinia enterocolitica, bacteriophages; on.
  • the plastic product is selected from the group consisting of molding compounds, moldings, moldings, workpieces, semi-finished products, finished parts, granules, masterbatches, fibers and films, preferably from the group consisting of moldings, moldings, workpieces, semi-finished products, finished parts, fibers and foils, in particular of foils.
  • the plastic product is not or has no coating, preferably no coating with a layer thickness of less than 40 m ⁇ ti, in particular no coating with a layer thickness of less than 31 mm, e.g. no coating with a layer thickness of 30 mph.
  • a coating in the context of the present invention is understood to mean a layer that is formed by applying a liquid coating agent to a solid surface and then curing the liquid composition, ie the liquid coating agent (by drying, solidification or chemical reaction) is obtained.
  • a coating should explicitly not be understood as meaning a layer that was produced by coextrusion, such as a layer (eg an inner layer or an outer layer (top layer)) of a multilayer film produced by coextrusion.
  • the plastic product according to the invention is selected from the group consisting of molded bodies, molded parts, workpieces, semi-finished products, finished parts, fibers and foils, in particular foils
  • the plastic product is preferably produced from a molding compound, a granulate and/or a masterbatch. It is then preferred that the molding composition, the granulate and/or the masterbatch contains or consists of the plastic to be used according to the invention and the phosphor to be used according to the invention.
  • the plastic product according to the invention can be obtained using numerous manufacturing processes, as are preferably described in the standard DIN 8580:2003-09.
  • plastic products according to the invention are preferably produced by primary shaping and/or forming processes.
  • archetype methods selected from the group consisting of archetypes from the liquid state and archetypes from the plastic state, preferably selected from the group consisting of gravity casting, die casting, low-pressure casting, centrifugal casting, dip molding, archetypes of fiber-reinforced plastics, compression molding, injection molding, transfer molding, Extrusion, extrusion, drawing, calendering, blow molding and modeling.
  • These primary shaping processes are described, for example, in the DIN 8580:2003-09 standard.
  • Forming processes selected from the group consisting of deep-drawing, thermoforming and rolling are also preferred. Suitable forming processes are described, for example, in the standard DIN 8580:2003-09. It is particularly preferred that the plastic products according to the invention are produced by means of extrusion, calendering and/or rolling, very particularly preferably by means of extrusion.
  • plastic products according to the invention are produced by means of 3D printing, preferably in a melt layering process, also referred to as fused deposition modeling (FDM) or fused filament fabrication (FFF).
  • FDM fused deposition modeling
  • FFF fused filament fabrication
  • Plastic products in which the plastics are selected from thermoplastics can be produced in various mixing units such as e.g Process for the production of a molded body or component can be used. Such processes can be, for example, without being limited to: injection molding, extrusion of profiles, plates, foils, and thermoforming processes.
  • the resulting component is also frequently referred to as a molded body, the term component or molded body not being limited to thermoplastic products.
  • Multi-component parts produced from the use of the plastic products according to the invention such as e.g. co-extruded or laminated multi-layer plates or foils or components in multi-component injection molding, are another subject of the invention.
  • An advantage of the plastic product according to the invention is that when new surfaces are created (e.g. by forming, drilling, sawing, grinding, machining) these are immediately equipped with the antimicrobial properties since the phosphor particles are preferably distributed evenly in the plastic product.
  • the plastic product would then possibly not be complete antimicrobial (i.e. not antimicrobial in the entire volume), but only part of the surface.
  • the co-extruded material would behave like an antimicrobial coating.
  • the antimicrobial layer of a co-extruded material is not understood as a coating.
  • the antimicrobial layer of a co-extruded material is the result of a thermoplastic processing.
  • a coating is the result of a manufacturing process in which a liquid is applied to a solid surface and this liquid subsequently hardens.
  • the plastic product according to the invention can be used to produce objects with an antimicrobial effect.
  • An object with an antimicrobial effect is an object that limits or prevents the growth and/or multiplication of microorganisms on at least parts of its surface.
  • a further object of the invention is thus an object which comprises the plastic product according to the invention and/or is produced from it.
  • this object can also have other parts (e.g. components) and components that differ from the plastic product according to the invention.
  • Such parts and components can be made of metal or wood, for example, but it can also be a plastic product without a phosphor.
  • the plastic product according to the invention or the object according to the invention, which comprises the plastic product and/or is produced from it, is preferably used in hygiene facilities, hospitals and/or in the food industry.
  • the plastic product according to the invention or the object according to the invention can also be a household item/household appliance or part of a Household item/household appliance, such as a component or a control element (e.g. control dial, switch, fittings, etc.).
  • a household item/household appliance or part of a Household item/household appliance, such as a component or a control element (e.g. control dial, switch, fittings, etc.).
  • common household items/household appliances are coffee machines, stoves, washing machines, dishwashers and containers (e.g. for detergents, fabric softeners, cleaning agents, food, spices, pharmaceuticals, care products and cosmetics).
  • plastic products according to the invention or the objects that comprise these plastic products and/or are made from them are preferably selected from: - kitchen and laboratory worktops,
  • FIG. 1 Structure of the agar plate test.
  • the phosphor sample ( ⁇ ) is applied to a confluently inoculated nutrient agar plate ($$S) and incubated under constant illumination for 24 ⁇ 1 h at room temperature. To check the antimicrobial effectiveness through the effect of up-conversion, the samples were also incubated in the dark.
  • FIG. 2 Structure of the transfer method.
  • the plastic products containing the phosphors are pressed with a defined weight onto a confluent inoculated nutrient agar plate (1).
  • the bacteria transferred in this way are incubated under light or in the dark at room temperature (2).
  • the antimicrobial effect is detected by means of an imprint with a defined weight on nutrient agar (3).
  • FIG. 3 Cultivability of B. subtilis after incubation on a plastic product (foil) with 5% by weight (based on the total mass of the plastic product) CaLi 2 Si0 4 :Pr 3+ ,Na + (1%) in the exposed and darkened state.
  • B. subtilis was incubated for 0 h, 1 h, and 4 h at room temperature with and without light. The subsequent cultivation of the cells on CASO agar took place for 24 ⁇ 1 h at 30 °C. The figure shows a representative photograph.
  • the transmission measurements were determined using a "Specord 200 Plus" UV/VIS double-beam spectrometer from Analytik Jena. An internal wavelength calibration is carried out with a holmium oxide filter. The samples were irradiated with monochromatized light from a deuterium (UV range) or a tungsten-halogen lamp (visible range). The spectral bandwidth is 1.4 nm. The monochromatized light is divided into a measurement channel and a reference channel and enables direct measurement against a reference sample. The radiation transmitted through the sample is detected and processed by a photodiode. The measurements were made in transmission mode. The measurement range was 190 to 1100 nm with an increment of 1 nm. The measurement speed was 10 nm/s, which corresponds to an integration time of 0.1 s.
  • Cast film unit Brabender Univex Take off type: 843322 and blown film unit Brabender type: 840806
  • thermoplastics PE, PP
  • UPES duroplastics
  • UV/VIS transmission spectra were carried out for some plastics. The preparation of the samples is described under 2.3.1.
  • a sufficient criterion (but not a necessary criterion) for the suitability of a plastic is that the transmission is at least 60% at a wavelength of 260 nm and 500 nm with a material thickness of 100 mhh.
  • Table 2 Overview of transmission at 260 nm and 500 nm at a material thickness of 100 mph
  • Example 1 Cao,98Pro,oiNao,oiLi2Si04
  • BaY2Sl30io:Pr 3+ manufactured according to the following specification: 2.1273 g (10.7800 mmol) BaCO3, 1.9828 g (33.0000 mmol) S1O2, 2.4839 g (11.0000 mmol) and 0.0187 g (0.0183 mmol) RGQOII were dissolved in acetone in mixed in an agate mortar. This prepared mixture was calcined at 1400°C for 6 hours under CO atmosphere to obtain the product.
  • Tests were carried out on Bacillus subtilis, which is registered in the DVGW (German Gas and Gas Industry Association).
  • worksheet W 294 "UV devices for disinfection in the water supply" used for biodosimetric testing of UV systems.
  • a gram-positive spore-forming bacterium it is particularly insensitive to UV radiation and is therefore well suited as a "worst case” for testing the antimicrobial effect of UV radiation.
  • E. coli is a gram-negative aerobic bacterium that is predominant in the human intestinal tract and is therefore a typical indicator of faecal contamination. Contamination of other tissues with E. coli often leads to infectious diseases, such as infections in the urogenital tract.
  • the antimicrobial effect of the phosphors on the test organisms B. subtilis and E. coli was checked using the agar plate test.
  • test organisms Bacillus subtilis subsp. spizizenii (DSM 347, ATCC 6633) and Escherichia coli (DSM 1116; ATCC 9637). The test organisms were used in suspension at a final concentration of 10 7 cells/ml.
  • the bacterial suspensions were prepared by diluting precultures of the respective bacterial strain. Diluted in sterile deionized water.
  • the precultures of the test organisms were prepared in sterilized casein peptone soybean peptone (CASO) broth.
  • the preculture of B. subtilis was incubated for 16 ⁇ 1 h at 30 °C with constant shaking in a shaking water bath.
  • the preculture of E. coli was placed at 36 °C in a thermally insulated Erlenmeyer flask with a magnetic stirring bar incubated with constant stirring at 350 rpm.
  • the cell titer of the precultures was determined microscopically using a haemocytometer (counting chamber according to Thoma).
  • agar plate test For the agar plate test, 1.0 ml of the bacterial suspension with 10 7 cells/ml was evenly distributed on a sterile CASO agar plate in order to ensure confluent coverage of the nutrient agar. The bacterial suspension applied was equilibrated on the nutrient agar for 300 ⁇ 30 s at room temperature (22 ⁇ 2 °C) before the phosphors were applied in the center.
  • calcium carbonate and copper oxide were applied centered on the nutrient plates as negative and positive references. It is known that copper oxides have a growth-inhibiting effect, while calcium carbonates must not exhibit any growth-inhibiting effect.
  • the feed plates were incubated for 24 ⁇ 1 h at room temperature under constant lighting. The same approach was also incubated in the dark.
  • Incubation under illumination and in the dark is intended to indicate the up-conversion of the phosphors, provided a growth-inhibiting effect is only present in the illuminated state.
  • a growth-inhibiting effect is given when a zone without bacterial colony growth develops concentrically around and on the accumulated phosphor particles or reference particles on the nutrient agar. There is no growth-inhibiting effect if bacterial colony growth is detected on the nutrient agar around and on the accumulated phosphor particles or reference particles. After incubation under illumination after 24 ⁇ 1 h at room temperature, a growth-inhibiting effect of the phosphor CaLi 2 SiC> 4 :Pr 3+ ,Na + (1%) for B. subtilis and E. coli could be detected. No growth-inhibiting effect could be detected around the other phosphors (Table 3). For all phosphors, no bacterial colony growth could be detected around and on the accumulated phosphor particles under darkened incubation conditions.
  • the calcium carbonate reference showed no zone of bacterial growth inhibition either in the light or in the dark.
  • the reference with copper oxide shows a concentric zone without bacterial colony growth both in the light and in the dark.
  • the phosphors also showed no genuine bacterial contamination.
  • Plastic product the phosphor CaLi 2 SiC> 4 :Pr 3+ ,Na + (1%) is incorporated into plastics.
  • thermoplastic compound for producing the mixtures for the thermoplastic test specimens
  • Premixes of 2.5 kg each, consisting of the corresponding plastic (PE, PP) and the phosphor were weighed out together.
  • the phosphor was added in the specified proportions by mass, based on the overall composition of the premix (specified in % or equivalent to % by weight). In each case, a comparison mixture without a phosphor was considered. Mixtures with 1% and with 5% phosphor were produced.
  • the resulting premix was then added to the Brabender metering unit and fed to the Leistritz ZSE27MX-44D twin-screw extruder (manufacturer Leistritz Extrusionstechnik GmbH) via a screw conveyor for processing.
  • the respective compound was processed at a defined speed (rpm) and a defined temperature setting.
  • the plastic strand was then granulated using a 3.20 m water bath to cool the strand.
  • the temperature profiles of the respective plastics were selected according to the technical data sheets. The temperatures, speeds and pressures for the various plastics can be found in Table 1.
  • the plastics are used as a powder if possible (e.g. by prior grinding) so that the phosphor can be mixed in well.
  • 2.3.1.2 Manufacture of plastic products in the form of PE-based blown film or
  • a Brabender Lab Station of type 815801 from Brabender GmbH & Co KG was used to produce the films, and the material was fed to the die with the associated mini-extruder from Brabender, type: 625249.120. Either a 15 cm wide slot die for cast film was fitted or a blown film head with a diameter of 10 cm was used. The cast films were then wound up on the Brabender device Univex Take off type: 843322 and the blown films on the Brabender device type: 840806. The conditions for film production were taken from the technical data sheets for the plastics processed and all films were produced at a speed of 18 m/min. The foils obtained were cut to a size of 2.5 cm x 4 cm for carrying out the transfer method (see 2.3.2). With this method, the plastic products were processed into foils, which were previously produced as compounds with and without phosphors according to 2.3.1.1.
  • the aforementioned speed mixer was used to produce the UPES-based plastic product, and the components listed in Table 4, including the phosphor, were incorporated one after the other as follows.
  • the main component of the plastic product i.e. UPES (see Table 1), is placed in the speed mixer pot and the catalyst (0.98% by weight based on the total mass of the mixture) is mixed in for 15 s at 2500 rpm.
  • the accelerator 0.29% by weight based on the total mass of the mixture was then also mixed in for 15 s at 2500 rpm.
  • the phosphor according to the invention (0% by weight, 1% by weight or 5% by weight, based on the total mass of the mixture) was added directly to the UPES before addition of the catalyst and accelerator and this mixture is then mixed for 60 s at 2500 rpm. Only then were the catalyst and accelerator added.
  • the mixtures were poured into aluminum bowls with a diameter of 10 cm. These aluminum bowls were previously preheated to 50° C. on a hotplate for 5 minutes and remain on this hotplate during filling and for a further 2 minutes afterwards.
  • the filled aluminum bowls are then stored at room temperature for 24 h and then placed in an oven at 80° C. for 5 h.
  • the resulting plastic products were removed from the oven and placed in the hood at room temperature for a further 24 hours. Only then was the antimicrobial effect of the resulting plastic products with or without a phosphor examined.
  • the compounds produced were smooth plates (injection mold: double plates smooth, company: AXXICON) with a size of 6 cm x 6 cm and a thickness of 2 mm.
  • the injection molding conditions were taken from the technical data sheet of the PP.
  • Plastic products based on PP containing 1% and 5% phosphor were compared with one without phosphor, which were previously manufactured as compounds according to 2.3.1.1.
  • Bacillus subtilis subsp. spizizenii (DSM 347, ATCC 6633). 1 ml of a B. subtilis suspension with a final concentration of 10 7 cells/mL was evenly distributed on a sterile CASO agar plate to ensure confluent coverage of the nutrient agar. The bacterial suspension applied was equilibrated on the nutrient agar for 300 ⁇ 30 s at room temperature (22 ⁇ 2 °C). The bacterial suspensions were prepared by diluting precultures of the respective bacterial strain. Diluted in sterile deionized water. The precultures of the test organisms were prepared in sterilized CASO broth. The preculture of B.
  • subtilis was incubated for 16 ⁇ 1 h at 30 °C with constant shaking in a shaking water bath.
  • the cell titer of the precultures was determined microscopically using a haemocytometer (counting chamber according to Thoma).
  • the aim of the transfer method is to simulate the antimicrobial effect of the plastic surface under realistic conditions on a dry, inanimate surface.
  • the plastic products obtained as described above were pressed onto a nutrient agar plate inoculated confluently with B. subtilis with a defined weight of 90 ⁇ 1 g for 60 ⁇ 5 s. This step transferred the bacteria semi-dry to the surface of the plastic products.
  • the plastic articles were then placed in an empty Petri dish with the inoculated side up and incubated under lighting at room temperature for 0 h, 1 h, 2 h and 4 h.
  • the foils were also incubated with the inoculated side in the dark at room temperature for 0 h, 1 h, 2 h, 4 h.
  • a growth-inhibiting effect can be checked in the transfer method by a decrease in the culturability of B. subtilis.
  • the results are summarized in Table 4. A representative picture of the results is shown in FIG.3.
  • the culturability of the adherent bacteria on the surface of the plastic products shows a significant reduction in proliferation with increasing incubation time.
  • the phosphor CaLi 2 Si0 4 :Pr 3+ ,Na + (1%) causes a significant reduction in the cultivability of ß. subtilis compared to the blank (plastic article without phosphor) and the plastic articles incubated in the dark. This reduction can already be measured after 1 h of incubation under constant lighting.
  • the decrease in culturability increases up to the incubation time of 4 hours with constant lighting.
  • the plastic products incubated in the dark show no reduction in culturability over the incubation period of 4 hours.

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  • Organic Chemistry (AREA)
  • Engineering & Computer Science (AREA)
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  • Chemical Kinetics & Catalysis (AREA)
  • Health & Medical Sciences (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Inorganic Chemistry (AREA)
  • Compositions Of Macromolecular Compounds (AREA)
  • Silicates, Zeolites, And Molecular Sieves (AREA)
  • Luminescent Compositions (AREA)
  • Agricultural Chemicals And Associated Chemicals (AREA)
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Abstract

L'invention concerne des produits plastiques contenant au moins un matériau synthétique et au moins un luminophore de formule générale (I) A1-x-y-zB*yB2SiO4:Ln1x,Ln2z (I), où : A est choisi dans le groupe constitué par Mg, Ca, Sr et Ba ; B est choisi dans le groupe constitué par Li, Na, K, Rb et Cs ; B* est choisi dans le groupe constitué par Li, Na et K ; B = B* ou B ≠ B*, de préférence B ≠ B* ; Ln1 est choisi dans le groupe constitué par le praséodyme (Pr), l'erbium (Er) et le néodyme (Nd) ; Ln2 est du gadolinium (Gd) ; x = 0,0001 à 0,0500 ; z = 0,0000 ou z = 0,0001 à 0,3000, à condition que : y = x + z ; ainsi que des objets qui comprennent lesdits produits plastiques et/ou sont fabriqués à partir de ceux-ci.
EP22717157.6A 2021-04-13 2022-03-23 Produits plastiques contenant des luminophores Pending EP4323469A1 (fr)

Applications Claiming Priority (2)

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PCT/EP2022/057600 WO2022218662A1 (fr) 2021-04-13 2022-03-23 Produits plastiques contenant des luminophores

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DE10238399A1 (de) * 2002-08-22 2004-02-26 Philips Intellectual Property & Standards Gmbh Vorrichtung zur Erzeugung von Strahlung
DE10238398A1 (de) * 2002-08-22 2004-02-26 Philips Intellectual Property & Standards Gmbh Vorrichtung zur Erzeugung von Bildern und/oder Projektionen
DE102005048131A1 (de) 2005-10-06 2007-04-12 Bayer Innovation Gmbh Antimikrobielle Kunststoffzusammensetzung mit niedriger Elutionsrate und langer Wirksamkeit
DE102007035063A1 (de) 2007-07-26 2009-01-29 Spiegelberg (Gmbh & Co.) Kg Verfahren zur Herstellung eines antimikrobiellen Kunststoffproduktes
US8236239B2 (en) 2007-11-16 2012-08-07 Bernstein Eric F Sterilizing compositions comprising phosphors for converting electromagnetic radiation to UVC radiation and methods for using the same
WO2021073915A1 (fr) * 2019-10-14 2021-04-22 Evonik Operations Gmbh Convertisseur ascendant bleu-uv comprenant des ions lanthanide tels que des silicates pr3+-activés et éventuellement gd3+-co-activés et son application à des fins de désinfection de surface

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CA3214680A1 (fr) 2022-10-20
WO2022218662A1 (fr) 2022-10-20

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