Photoinitiators

TPO photoinitiator 2,4,6-trimethylbenzoyl-diphenylphosphine oxide

Product introduction
TPO is an efficient free radical type I UV curing initiator. Due to its broad UV absorption spectrum, it is especially suitable for curing of low yellowing systems, colored especially white systems and thick film layers. Used in coatings and surface paints containing titanium oxide, it has extremely low yellowing, so it has a very wide range of application values in surface coatings of optical fibers, optical discs, credit cards, electronic circuit boards, etc.

Typical value

molecular formula	C22H21PO2
molecular weight	348.4
Exterior	Pale yellow powdery solid
purity	≥99.0%
melting point	87~93℃
Volatile	≤0.3%
Acid value	≤1mg KOH/g
Absorption wavelength	380nm

Typical characteristics

典型应用

typical application

Wide UV absorption range

Excellent absorption properties

Suitable for colored, especially white systems

very low yellowing

Excellent deep curing performance

·Silk printing ink

· Lithographic printing ink

·Flexo printing ink

·electronic product

·Wood coating

Recommended dosage
It is recommended to add 1-3% in the product.

Storage conditions
This product should be stored in a sealed condition away from light, and stored in a low temperature and dry place.

Safety Instructions

1: Unified chemical resistant gloves
2: Avoid inhalation
3: Avoid direct contact with eyes, skin and clothing
4: In case of eye contact, please wash with plenty of water.

Package
20KG paper drum or carton