Product introduction
Photoinitiator 184 is the best choice for non-yellowing applications. It is a fracture-type photoinitiator with high speed and long shelf life. Non-yellowing and low irritation properties make it an ideal varnish for paper, flooring, metal, plastic and wood.

physical parameters
structure:

Chemical name: 1-Hydroxycyclohexylphenone
CAS No. : 947-19-3
EINECS No. : 231-426-9
Molecular formula: C13H16O2
Molecular weight: 204.27
Appearance: White to off-white crystalline powder
Odor: very faint
Melting point: 47-50 °C
Boiling point: 175°C @15 mmHg
Specific Gravity: 1.1 - 1.2 @20°C

Solubility
(g/ 100 ml solvent@20°C)
Acetone: > 100
Toluene: >100
Acrylates: >100
Ethyl acetate: > 100
Ethanol: >100
HDDA: > 100
Vinylpyrrolidone: > 100
TMPTA: >50
2-ethyl acrylate: >50
Water: <0.1

Specification
Appearance: White to off-white crystalline powder
Content: ≥99.0%
Melting point: 46-50°C
Volatile matter: ≤0.5%
Transparency: ≥97% @425 nm
≥98% @500 nm

application
Photoinitiator 184, when irradiated with ultraviolet light, undergoes homolytic cleavage in the molecule to generate a pair of free radicals, which initiates the polymerization of the ultraviolet curing system. It does not require a hydrogen donor to initiate free radicals. But its free radicals are very sensitive to oxygen in the air.
Photoinitiator 184 is strongly recommended when non-yellowing properties are critical. The outdoor exposure test results show that it has better long-term non-yellowing properties than other initiators. In addition, it is less sensitive to air inhibition than photoinitiator 1173 during curing.
The usage of photoinitiator 184 varies with system composition, light source, line speed, and film thickness, but is typically between 0.5% and 5% w/w. Photoinitiator 184 can be used in printing inks, overprint varnishes, wood paints, adhesives and photoresist dry films.

Storage conditions
Must be stored in airtight containers in dark, dry conditions.

Package
20kg carton