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US 2024/0132779 A1Published application
Plastic products containing luminophores
AssigneeEvonik Operations GmbH
InventorsMatthias NAUMANN, Kathrin Lehmann, Simone Schulte, Christina Janke
Life of this patent
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Abstract
Plastic products contain at least one synthetic material and at least one luminophore of the general formula (I) Lu3−a−b−nLnb(Mg1−zCaz)aLin(Al1−u−vGauScv)5−a−2n(Si1−d−eZrdHfe)a+2nO12 (I), where a=0-1, 1≥b>0, d=0-1, e=0-1, n=0-1, z=0-1, u=0-1, and v=0-1, with the proviso that u+v≤1 and d+e≤1. Ln is selected from praseodymium (Pr), gadolinium (Gd), erbium (Er), neodymium (Nd), and yttrium (Y). Objects containing the plastic product and objects made therefrom are also provided.
Claims20
1:
- A plastic product, comprising:
- at least one plastic, and
- at least one phosphor of the general formula (I)
- Lu3−a−b−nLnb(Mg1−zCaz)aLin(Al1−u−vGauScv)5−a−2n(Si1−d−eZrdHfe)a+2nO12 (I),
- wherein
- a=0-1, 1≥b>0, d=0-1, e=0-1, n=0-1, z=0-1, u=0-1, v=0-1,
- with the proviso that u+v≤1 and d+e≤1, and
- Ln is selected from the group consisting of praseodymium (Pr), gadolinium (Gd), erbium (Er), neodymium (Nd), and yttrium (Y).
5 more elements
2:
- The plastic product according to claim 1, wherein the at least one phosphor has been doped with praseodymium.
3:
- The plastic product according to claim 1, wherein the at least one phosphor is at least partially crystalline.
4:
- The plastic product according to claim 1, wherein the at least one phosphor is selected from compounds of the general formula (Ia)
- (Lu1−x−yYxGdy)3−a−b−nLnb(Mg1−zCaz)aLin(Al1−u−vGauScv)5−a−2n(Si1−d−cZrdHfe)a+2nO12 (Ia),
- wherein
- a=0-1, 1≥b>0, d=0-1, e=0-1, n=0-1, x=0-1, y=0-1, z=0-1, u=0-1, v=0-1,
- with the proviso that x+y≤1, u+v≤1, and d+e≤1, and
- Ln is selected from the group consisting of praseodymium (Pr), erbium (Er), and neodymium (Nd).
3 more elements
5:
- The plastic product according to claim 1, wherein the at least one phosphor is a compound of the formula Lu2−bPrbLiA3Si2O12 with 1≥b>0.
6:
- The plastic product according to claim 1, wherein the at least one phosphor, on irradiation with electromagnetic radiation having lower energy and longer wavelength in the range from 2000 nm to 400 nm, emits electromagnetic radiation having higher energy and shorter wavelength in the range from 400 nm to 100 nm.
7:
- The plastic product according to claim 1, wherein the at least one phosphor has XRPD signals in the range from 17° 2Θ to 19° 2Θ and from 31° 2Θ to 35° 2Θ.
8:
- The plastic product according to claim 1, wherein the at least one phosphor has a particle size d50 of 0.1 to 100 μm.
9:
- The plastic product according to claim 1, wherein a proportion by mass of all phosphors is from 0.02% to <50.00%, based on a total mass of the plastic product.
10:
- The plastic product according to claim 1, wherein the at least one plastic is selected from the group consisting of thermoplastics and thermosets.
11:
- The plastic product according to claim 10, wherein
- a) the thermoplastic is selected from the group consisting of acrylonitrile-butadiene-styrene (ABS), polyamide (PA), polylactate (PLA), poly(alkyl) (meth)acrylate, polymethylmethacrylate (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), and/or
- b) the 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).
12:
- The plastic product according to claim 1, wherein a proportion by mass of all plastics is from >50.00% to 99.98%, based on a total mass of the plastic product.
13:
- The plastic product according to claim 1, wherein the plastic product has antimicrobial action against bacteria, yeasts, moulds, algae, parasites, and/or viruses.
14:
- The plastic product according to claim 1, wherein the plastic product is selected from the group consisting of moulding compounds, shaped bodies, mouldings, workpieces, semifinished products, finished products, granules, masterbatches, fibres, and films.
15:
- An article comprising and/or produced from the plastic product according to claim 1.
16:
- The plastic product according to claim 5, wherein in the formula Lu2−bPrbLiAl3Si2O12, b=0.02.
17:
- The plastic product according to claim 6, wherein an intensity of an emission maximum of the electromagnetic radiation having high energy and shorter wavelength is an intensity of at least 1·103 counts/(mm2·s).
18:
- The plastic product according to claim 8, wherein the at least one phosphor has a particle size d50 of 0.1 to 5 μm.
19:
- The plastic product according to claim 9, wherein the proportion by mass of all phosphors is from 1.00% to 7.00%, based on the total mass of the plastic product.
20:
- The plastic product according to claim 11, wherein the thermoplastic elastomers are selected from the group consisting of thermoplastic polyamide elastomers, thermoplastic copolyester elastomers, thermoplastic elastomers based on olefins, thermoplastic styrene block copolymers, thermoplastic polyurethanes, thermoplastic vulcanizates, and crosslinked thermoplastic elastomers based on olefins.