DAROCUR®1173

General    

DAROCUR®1173is a versatile highly efficient liquid photoinitiator
which is used to initiate the photopolymerisation of chemically unsaturated
prepolymers - e.g. acrylates - in combination with mono- or multifunctional
monomers.

Absorption
Spectrum

(% in Acetonitrile)

Physical
Properties   Appearance: colorless to slightly yellow
liquid
                                   Odor:
slight
                                   Miscibility: in most common organic
solvents as well as most
                                   acrylate based
monomers exceeds 50g/100g;
                                   practically
insoluble in water.
                                   Melting point:
4°C
                                   Boiling point (at 0.13 mbar ~ 0.1
Torr): 80 - 81°C
                                   Flashpoint: >
100°C
                                   Density : 1.08 g/cm3

                                   Viscosity (at 20°C):
25 mPa.s
Application

DAROCUR®1173may be used after adequate
testing for applications such as UV curable clear coatings based on acrylates
for paper, metal and plastic materials.
As a liquid UV curing agent with
excellent compatibility, DAROCUR®1173 is especially easy to
incorporate. It is therefore highly suitable for blends with other
photoinitiators.
DAROCUR®1173 is especially recommended
when UV coatings are required to exhibit only minimal yellowing even after
prolonged exposure to sunlight. Yellowing of urethane acrylates may be further
reduced by addition of Ciba Specialty Chemicals hindered amine light stabilizer
TINUVIN ® 292.The amount of  DAROCUR®1173required for
optimum performance should be determined in trials covering a concentration
range.

Recommended
concentrations :

film thickness: 5 – 20
mm 2.0 – 4.0 %DAROCUR®1173

film thickness: 20 –
2000 mm 1.0 – 3.0 %DAROCUR®1173

Safety and
Handling

DAROCUR®1173should be handled
in accordance with good industrial
practice. Detailed information is provided
in the Safety Data Sheet.