ECure 819

ECure 819

CAS No.: 162881-26-7

Chemical Name: Bis(2,4,6-trimethylbenzoyl)-phenylphosphineoxide

Molecular Formula: C23H30N2O2

Molecular Weight: 418.46

Appearance: yellowish powder

Absorption: 295, 370nm

Purity: >99.0%

Melting Point: 127-133°C

Description:  Photoinitiator ECure 819 is 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.

Applications: ECure 819 may be used, after adequate testing, 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.

ECure 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. Additionally the outstanding absorption properties of ECure 819 allow curing of thick sections.

ECure 819 can be used in combination with other photoinitiators such as ECure 184 or ECure BDK. With the latter it is especially suited to cure polyester/styrene resins as used for glass reinforced materials.

Due to its photosensitivity at longer wavelengths, ECure 819 can easily be used in combinations with UV absorbers. It is therefore ideally suited for use in weather-resistant UV curable coatings.

The amount of ECure 819 required for optimum performance should be determined in trials covering a concentration range.

Recommended dosage:

Clear acrylic and unsaturated polyester/styrene coatings 0.1 – 0.2% ECure 819 1 – 2% ECure 184

White acrylic and unsaturated polyester/styrene coatings 0.5 – 1% ECure 819 1 – 2% ECure 184

Colored acrylic formula 0.5 – 1% ECure 819 1 – 2% ECure 184

White Screen Printing Ink 0.5 – 1.5% ECure 819 1 – 2% ECure 184

Glass fiber reinforced unsaturated polyester/styrene prepreg 0.1 – 0.2% ECure 819

Key words: ECure 819, photoinitiator 819, 162881-26-7