Bis(2,4,6-trimethylbenzoyl)-phenylphosphineoxide
PowerCure™ 819 is a versatile photoinitiator for radical polymerisation of unsaturated resins upon UV light exposure. It is especially suited for white pigmented formulations, the curing of glass fiber reinforced polyester/styrene systems and for clearcoats for outdoor use in combinations with light stabilizers. Thick section curing is also possible with this photoinitiator.
| Synonyms | Omnirad 819, Irgacure 819 |
CAS Number | 162881-26-7 |
EINECS Number | 423-340-5 |
Chemical Structure |
|
Chemical Formula | C26H27O3P |
Molecular Weight | 418.5 |
Packing | PowerCure™ 819 is supplied in a 20kg Carton. |
Note | All information in the leaflet is based on our present knowledge and experience. We reserve the right to make any changes according to technological progress or further developments. Performance of the product described herein should be verified by testing. We specifically disclaim any other express or implied warranty of fitness for a particular purpose or merchantability. We disclaim liability for any incidental or consequential damages. |
PowerCure™ 819 may be used in UV curable formulations for clear and for pigmented coatings on wood, metal, plastic, paper and optical fibers as well as for printing inks and prepregs after adequate testing.
PowerCure™ 819 exhibits at low concentrations an outstanding curing performance in highly opaque white and colored furniture coatings or screen inks containing rutile titanium dioxide or colored pigments and affords minimum yellowing after exposure to sufficient amounts of UV radiation. In addition, the outstanding absorption properties of this product allow curing of thick sections.
PowerCure™ 819 can be used in combination with other photoinitiators such as PowerCure™ 184 and it is especially suited to cure polyester/styrene resins as used for glass reinforced materials with some photoinitiators.
PowerCure™ 819 can also easily be used in combinations with UV absorbers due to its photosensitivity at longer wavelengths. This type I photoinitiator is therefore ideally suited for use in weather-resistant UV curable coatings.
The amount of PowerCure™ 819 required for optimum performance should be determined in trials covering a concentration range.
Appearance | Yellowish powder |
Melting point (°C) | 127-135 |
Purity (%) | Min.98 |
Solubility [20°C] | % w/w |
Acetone | 14 |
Butyl acetate | 6 |
Methanol | 3 |
Toluene | 22 |
Hexanedioldiacrylate (HDDA) | 9 |
Oligomeric acrylate | 3 |
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PowerCure 819 Photoinitiator CAS 162881 26 7 
