August 17, 2022 Longchang Chemical

Characteristics, types and applications of UV absorbers

UV absorber is such a class of substances, it can absorb sunlight or fluorescent light source in the ultraviolet wavelength part, and its own physical properties, structure does not change. UV absorbers can be divided into the following categories according to their chemical structure: salicylates, benzophenones, benzotriazoles, substituted acrylonitrile, triazines, etc. The more common ones on the market are benzophenones, benzotriazoles and triazines. They all work on the principle of converting high-energy UV light energy into heat or non-destructive longer light waves released, thus protecting the organic materials with UV absorbers from UV damage.

UV absorbers as additives for polymer materials, generally require its initial color light, no color stain; and polymer materials have good compatibility; with processing requirements of heat resistance, chemical stability, etc.. If used in food packaging materials, UV absorbers are also required to meet the environmental requirements of food packaging and migration resistance.

Above we explain the role of UV absorbers is to selectively absorb the high energy of the light source of ultraviolet light, by energy conversion, so that the high energy of ultraviolet light into harmless thermal energy release or consumption. The type of polymer is different, so that its aging damage to the UV wavelength (sensitive band) is not the same. As the following table.

Material Category Sensitive waveband (nm)
Polyethylene 300
Polyvinyl chloride 310
Polystyrene 318
Polyester 325
Polypropylene 310
Vinyl Chloride – Ethyl Acetate Copolymer 322-364
Polycarbonate 300-320
Polycarbonate (PC) 295
Nitrocellulose 310
Polymethyl methacrylate 290-315
Thermoplastic resins 290-320
Unsaturated Polyester 325

 

As the table shows, different types of polymer materials are sensitive to different wavelengths of ultraviolet light, and different UV absorbers can absorb different ranges of shielding light waves. Therefore, different resins choose the appropriate UV absorber to achieve good light stabilization effect.

In summary, as a UV absorber than the need to have the following conditions.

1, can strongly absorb UV ;

2, good chemical stability, no chemical reaction with other components in the material; good photochemical stability itself, not decomposition and discoloration.

3, good thermal stability, small volatility, and will not change due to heat in processing; ④

4、Good compatibility with polymer materials, can be uniformly dispersed in the material, no frosting, no precipitation ;

5, other properties, such as colorless, non-toxic, odorless; resistant to washing; cheap, easy to obtain.

 

Same series products

 

Product name CAS NO. Chemical name
Sinocure® TPO 75980-60-8 Diphenyl(2,4,6-trimethylbenzoyl)phosphine oxide
Sinocure® TPO-L 84434-11-7 Ethyl (2,4,6-trimethylbenzoyl) phenylphosphinate
Sinocure® 819/920 162881-26-7 Phenylbis(2,4,6-trimethylbenzoyl)phosphine oxide
Sinocure® ITX 5495-84-1 2-Isopropylthioxanthone
Sinocure® DETX 82799-44-8 2,4-Diethyl-9H-thioxanthen-9-one
Sinocure® BDK/651 24650-42-8 2,2-Dimethoxy-2-phenylacetophenone
Sinocure® 907 71868-10-5 2-Methyl-4′-(methylthio)-2-morpholinopropiophenone
Sinocure® 184 947-19-3 1-Hydroxycyclohexyl phenyl ketone
Sinocure®MBF 15206-55-0 Methyl benzoylformate
Sinocure®150 163702-01-0 Benzene, (1-methylethenyl)-, homopolymer,
ar-(2-hydroxy-2-methyl-1-oxopropyl) derivs
Sinocure®160 71868-15-0 Difunctional alpha hydroxy ketone
Sinocure® 1173 7473-98-5 2-Hydroxy-2-methylpropiophenone
Sinocure®EMK 90-93-7 4,4′-Bis(diethylamino) benzophenone
Sinocure® PBZ 2128-93-0 4-Benzoylbiphenyl
Sinocure®OMBB/MBB 606-28-0 Methyl 2-benzoylbenzoate
Sinocure® 784/FMT 125051-32-3 BIS(2,6-DIFLUORO-3-(1-HYDROPYRROL-1-YL)PHENYL)TITANOCENE
Sinocure® BP 119-61-9 Benzophenone
Sinocure®754 211510-16-6 Benzeneacetic acid, alpha-oxo-, Oxydi-2,1-ethanediyl ester
Sinocure®CBP 134-85-0 4-Chlorobenzophenone
Sinocure® MBP 134-84-9 4-Methylbenzophenone
Sinocure®EHA 21245-02-3 2-Ethylhexyl 4-dimethylaminobenzoate
Sinocure®DMB 2208-05-1 2-(Dimethylamino)ethyl benzoate
Sinocure®EDB 10287-53-3 Ethyl 4-dimethylaminobenzoate
Sinocure®250 344562-80-7 (4-Methylphenyl) [4-(2-methylpropyl)phenyl] iodonium
hexafluorophosphate
Sinocure® 369 119313-12-1 2-Benzyl-2-(dimethylamino)-4′-morpholinobutyrophenone
Sinocure® 379 119344-86-4 1-Butanone, 2-(dimethylamino)-2-(4-methylphenyl)methyl-1-4-(4-morpholinyl)phenyl-

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