Photoinitiator 819 CAS 162881-26-7

Ingredients:phenyl bis(2,4,6-trimethylbenzoyl)-phosphine oxideMolecular formula:C26H27O3PMolecular weight:418.5Content:≥ 99%Volatility:0.2%Ash:≤ 0.1%Use:
This product is suitable for UV-curable varnish and paint systems, such as for wood, paper, metals, plastics, fibers, printing inks and prepreg system and so on.
Package:25kgs/drum or carton and according to customer requirements.
Storage:This product should be stored in airtight, dry, dark place, avoid direct sunlight.
AppearanceYellowish crystalline powderAssay99.0%minMelting point127.0-131.5oCLoss on drying0.2%maxAsh0.1%maxCharacter and Application:
BAPO is a kind of photoinitiator with the same molecular structure as of the Ciba i-819 photoinitiator.BAPO appears light yellow powderthe melting point is at 127-131 oCand it has enough solubility in active diluents. Its typical absorptions are at 338nm 370nm 405 nm, and the maximum absorption wavelength can amount to 450 nm. Its photodissociation products are two benzoyl and one phosphorus acyl free radicals which are high so its photo is better than TPO.Because BAPO has in the long wave bandit can be not only used alone but also co-used with other photoinitiators. BAPO is suitable for being used in unsaturated polyester white wood resistant UV varnish UV powder low volatile and mild odor coating thick coating optical fiber coating adhesive offset printing ink screen printing ink flexo ink and it also can be used in wood varnishplastic metal varnish and paper gloss oil PCB and flexography.The usage of this product should the results and the suggested volume of addition is 0.1-5%.BAPO also absorbs a little in the visible regionit should be protected from light in the process of storage and transportation.
Advantages:1. Can be used in the thick coatingdeep curing
2. Can be used in both white system and brunet system
3. Belongs to low-volatilitymild-smell and product
4. Excellent and good solubility
5. Have light-decolourizatio