Benzophenone UV absorbers have a wide UV absorption band (covering 290-400nm, mainly absorbing UVA), good compatibility with polymer materials and high safety. So it’s widely applied in plastics, inks, paints, cosmetics and other industries.
What are the main types of benzophenone UV absorbers? And how about the future development direction?
There are many types of benzophenone UV absorbers in the market, most of them are derivatives of 2,4-dihydroxybenzophenone (BP-1), such as BP-3, BP12, etc.
With the development of the plastic modification and the broadening of application, the market for benzophenone UV absorbers also put forward higher requirements. Currently, benzophenone UV absorbers are developing in the direction of high molecular weight, polymer bonding (copolymerization and grafting) and multi-functional.
Mechanism of benzophenone UV absorbers
An intramolecular hydrogen bond is formed between the hydroxyl hydrogen on the benzophenone benzene ring and the neighboring carbonyl oxygen, constituting a chelating ring. When absorbing UV energy, the molecule undergoes thermal vibration, the hydrogen bond is destroyed, and the chelating bond is opened, so that the harmful UV rays are changed into harmless heat energy and released.
This process is repeated over and over again, efficiently absorbing UV rays and playing a light stabilizing role, thus preventing the photo-aging of polymer materials.
OMNISTAB KEY Benzophenone UV absorbers:
vOMNISTAB UV BP12
UV spectrum of OMNISTAB BP12
OMNISTAB UV BP12 is a highly efficient benzophenone UV absorber that strongly absorbs UV light from 270-340 nm. It is light-colored, non-toxic, compatible, low migration and easy to process. OMNISTAB UV BP12 provides excellent protection for polymers, delays yellowing and prevents loss of physical properties. UV BP12 has good compatibility with polyolefins, which effectively prevents loss during processing.
OMNISTAB UV BP12 could be widely used in PE, PVC, PP, PS, PC and other plastics, as well as in coating modification, such as automotive refurbishment paints, powder coatings,etc..
vOMNISTAB UV BP-1
OMNISTAB® UV BP-1 is mainly used for all kinds of plastics as light stabilizer(such as polyolefin, PVC and polystyrene), to prevent materials from light deterioration, also used as intermediates for synthesis of other UV absorbers.
vOMNISTAB UV BP-2
UV spectrum of OMNISTAB BP-2
The absorption wavelength range of BP-2 can cover 280-400nm. BP-2 has excellent thermal stability, so it’s application effect in all aspects is better than that of BP-1 ( UV-0 ). It showed excellent anti-aging effect in sunscreen, emulsion, honey, oil and other cosmetics. It is also widely applied in high-grade perfume, which can effectively improve the photo-stability of fragrances.
UV BP-2 is also suitable for light color/ transparent film and solar film paper. OMNISTAB BP-2 could be used in polyester, PVC, resin lenses, new high-grade coatings, paints and other products.
vOMNISTAB UV BP-3
OMNISTAB UV BP-3 is a broad spectrum UV absorber, which can absorb UV-A and UV-B. It’s the FDA approved class Ⅰ sunscreen, which is widely used in sunscreen cream, honey, emulsion, oil and other sunscreen cosmetics.
Besides, UV BP-3 also can be used in PVC, PP, PE and other plastic.
For more information about the use of above UV absorbers, please consult us or visit our official website. Looking forward to your inquiry!
