alpha cleavage type UV photoinitiator 184 CAS No. : 947-19-3

Photoinitiator for UV Radiation Curing Systems

INV184 is the best choice for non-yellowing application. It is an alpha cleavage type photoinitiator, which

1. Properties

Structure :

Chemical name : 1-Hydroxy cyclohexyl phenyl ketone

CAS No. : 947-19-3

EINECS No. : 213-426-9

Molecular formula : C 13 H 16 O 2

Molecular weight : 204.27

2. Physical Data

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

3. Solubility

(g in 100 ml solvent @20 C)

Acetone : > 100

Toluene : > 100

Methyl acrylate : > 100

Ethyl acetate : > 100

Ethanol : > 100

HDDA : > 100

N-Vinylpyrrolidone : > 100

TMPTA : > 50

2-Ethyl acrylate : > 50

Water : < 0.1

4. Specification

Appearance : White to off-white crystalline powder

Assay : 99% min.

Melting point : 46 - 50 C

Volatiles : 0.5% max.

Transmittance : 97% min. @425 nm

98% min. @500 nm

5. Application

INV 184, when irradiating with UV light, undergoes an intramolecular homolytic breakage to generate a pair

of free radicals to initiate the polymerization of UV curable systems. It does not require hydrogen donor to

initiate its radicals. However its radicals are very sensitive to oxygen in the air.

INV 184 is strongly recommended when non-yellowing properties are crucial. Results obtained from

outdoor exposure study show that it gives better long-term non-yellowing performance than other initiators.

Furthermore, It exhibits lower sensitivity to air inhibition than INV 1173 during curing.

The usage rates of INV 184 vary according to the composition of the system, source of light, line speed,

and film thickness but usually lie between 0.5% to 5% w/w. Chivacure  184 can be used for printing ink, overprint

varnishes and wood lacquers, adhesive, and photoresist dry film.

6. UV Spectrum

7. Storage

Must be stored in closed containers in dark dry conditions.

8. Packaging

20 kg net/carton box

9. HS Code

2914 4090