PROCESS FOR DISCOLORATION OF A COLORED POLYMERIC MATERIAL

    公开(公告)号:US20250032956A1

    公开(公告)日:2025-01-30

    申请号:US18719366

    申请日:2022-12-19

    Applicant: BASF SE

    Abstract: In a first aspect, the invention relates to a process for discoloration of a colored polymeric material comprising: (i) providing a colored polymeric material and providing a solvent comprising gamma-valerolactone: (ii) contacting the colored polymeric material with a solvent comprising gamma-valerolactone at a temperature in the range of from 40 to 170° C. thereby obtaining a solvent, which is enriched in colorant compared to the solvent provided in (i), and a polymeric material, which is depleted in colorant compared to the colored polymeric material provided in (i). A second aspect of the invention is related to a polymeric material, which is depleted in colorant obtained or obtainable from the process of the first aspect. In a third aspect, the invention is related to a use of the polymeric material, which is depleted in colorant according to the second aspect for textile applications, fiber applications, packaging applications or plastic applications. A fourth aspect of the invention is related to a method for preparing a textile or a packaging comprising (a) providing a polymeric material, which is depleted in colorant, preferably a polymeric material, which is depleted in colorant of the second aspect: (b) preparing a textile or a packaging from the polymeric material provided in (a).

    Cyanoaryl substituted benz(othi)oxanthene compounds

    公开(公告)号:US11236101B2

    公开(公告)日:2022-02-01

    申请号:US16954931

    申请日:2018-12-18

    Applicant: BASF SE

    Abstract: The present invention relates to a cyanoaryl substituted compound of formula (I), (I) wherein m is 0-4; R2, R3, R4 and R5 are selected from hydrogen, chlorine, bromine and C6-C24-aryl, which carries one to three cyano; each R1 independently from each other is selected from bromine, chlorine, cyano, —NRaRb, C1-C24-alkyl, C1-C24-haloalkyl, C1-C24-alkoxy, C1-C24-haloalkoxy, C3-C24-cycloalkyl, heterocycloalkyl, heteroaryl, C6-C24-aryl, C6-C24-aryloxy, C6-C24-aryl-C1-C10-alkylene, etc., with the proviso that at least one of the radicals R1, R2, R3, R4 and R5 is C6-C24-aryl, which carries one to three cyano; X is O, S, SO or SO2; A is a diradical of the formulae (A.1), (A.2), (A.3), or (A.4) wherein *, R6, (R7)n, (R8)o and (R9)p are as defined in the claims and in the description. The invention also relates to the use of said compound(s) in color converters, to said color converters and their use, to lighting devices, to a backlight unit for liquid crystal displays; a liquid crystal display device and a self-emissive display device comprising at least one compound (I).

    Transmitter for transmitting data and for emitting electromagnetic radiation in the visible spectral range and data transmission system

    公开(公告)号:US11496223B2

    公开(公告)日:2022-11-08

    申请号:US16639387

    申请日:2018-08-23

    Applicant: BASF SE

    Abstract: The present invention relates to a transmitter for transmitting data and for emitting electromagnetic radiation in the visible spectral range, wherein the transmitter comprises a) a radiation source for generating and emitting first electromagnetic radiation, b) a modulator being adapted to modulate the first electromagnetic radiation depending on the data to be transmitted generating modulated first electromagnetic radiation, and c) a frequency converter for converting at least a part of the modulated first electromagnetic radiation into modulated second electromagnetic radiation, said modulated second electromagnetic radiation being different from the modulated first electromagnetic radiation, wherein the frequency converter comprises a polymeric matrix material comprising at least one organic fluorescent colorant. Furthermore, the invention relates to an illumination device comprising such transmitter. Moreover, the invention relates to a data transmission system comprising such a transmitter as well as a receiver and a data analyzer.

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