Ciba® IRGACURE® 2022 - S u K Hock

General
Ciba Specialty Chemicals
Coating Effects Segment
Ciba ® IRGACURE ® 2022
Photoinitiator
IRGACURE 2022 is a highly efficient liquid curing agent that is used to
initiate radical polymerization of unsaturated resins after UV light
exposure.
IRGACURE 2022 is the first choice for use in pigmented formulations of all
colors, for curing of thick sections or for UV-stabilized clear coatings.
Unsaturated resins that are particularly suited are those based on a
prepolymer – e.g., acrylates or unsaturated polyesters – in combination
with mono- or multifunctional monomers as reactive diluents.
IRGACURE 2022 is to be considered as a one to one replacement for
IRGACURE 2020. Compared to IRGACURE 2020 this new blend shows
significantly improved long-term storage stability.
Chemical Composition IRGACURE 2022 contains IRGACURE 819 as one of the performance
determining main components to the extent required to fulfill most of
the needs to cure pigmented coatings:
Edition: 11.6.2003, Basle © Ciba Specialty Chemicals Inc. Page 1 of 1
O
O
P
Phenylbis(2,4,6-trimethylbenzoyl)-phosphine oxide)
(IRGACURE ® 819)
O

Absorption Spectrum
(% in Acetonitrile)
Physical Properties
Applications
Ciba Specialty Chemicals
Coating Effects Segment
Ciba ® IRGACURE ® 2022
Photoinitiator
Absorbance
2
1.5
1
0.5
Appearance: clear, viscous, yellow liquid
Miscibility: with most organic solvents, poorly soluble in water
Density: 1.1 g/cm 3
IRGACURE 2022
0
200 250 300 350 400 450 500
Wavelength (nm)
IRGACURE 2022 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
composites. For patent reasons, however, the use of this product is not
allowed in dental applications.
Suitable UV curable formulations may be based on acrylate resins,
acrylate monomer systems and unsaturated polyesters. As a liquid
photoinitiator, IRGACURE 2022 is especially easy to incorporate into
formulations.
IRGACURE 2022 exhibits outstanding curing performance in highly
opaque furniture coatings or screen inks containing rutile titanium
dioxide. Additionally, the outstanding absorption properties of IRGACURE
2022 allow curing of thick sections.
IRGACURE 2022 is the most cost-effective solution for curing of
pigmented UV-curable compositions due to its outstanding reactivity with
a well balanced ratio between through-cure and surface cure.
Edition: 11.6.2003, Basle © Ciba Specialty Chemicals Inc. Page 2 of 1
0.10
0.010
0.001

Recommended concentrations
Ciba Specialty Chemicals
Coating Effects Segment
Ciba ® IRGACURE ® 2022
Photoinitiator
The amount of IRGACURE 2022 required for optimum performance
should be determined in trials covering a concentration range.
Clear acrylate coatings: 1.0 – 2.0 % IRGACURE 2022
White acrylate furniture coatings: 1.5 – 3.5 % IRGACURE 2022
White screen printing inks: 2.0 – 4.0 % IRGACURE 2022
Glass reinforced UPES/styrene prepregs and composites: 1.0 – 2.0 % IRGACURE 2022
Safety and Handling
Important Notice
IRGACURE 2022 should be handled in accordance with good industrial
practice. Detailed information is provided in the Safety Data Sheet.
IRGACURE 2022 is sensitive to visible light and any exposure to sunlight
should be avoided. Opened drums should be closed after use to protect
the product against light.
IRGACURE 2022 may freeze upon exposure to low temperatures for
extended periods of time. Under such circumstances and also upon
storage for extended periods below 6 o C it cannot be completely
excluded that some crystallization occurs. In both cases the product is
readily returned into its original form by gentle heating (30ºC to 50ºC)
and stirring for a short period of time.
The use of IRGACURE 819 in combination with α-hydroxyketones, like
e.g. DAROCUR 1173 or IRGACURE 184 is covered by ……..
IMPORTANT: The following supersedes Buyer’s documents. SELLER
MAKES NO REPRESENTATION OR WARRANTY, EXPRESS OR IMPLIED,
INCLUDING OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR
PURPOSE. No statements herein are to be construed as inducements to
infringe any relevant patent. Under no circumstances shall Seller be
liable for incidental, consequential or indirect damages for alleged
negligence, breach of warranty, strict liability, tort or contract arising in
connection with the product(s). Buyer’s sole remedy and Seller’s sole
liability for any claims shall be Buyer’s purchase price. Data and results
are based on controlled or lab work and must be confirmed by Buyer by
testing for its intended conditions of use. The product(s) has not been
tested for, and is therefore not recommended for, uses for which
prolonged contact with mucous membranes, abraded skin, or blood is
intended; or for uses for which implantation within the human body is
Edition: 11.6.2003, Basle © Ciba Specialty Chemicals Inc. Page 3 of 1

Ciba Specialty Chemicals
Coating Effects Segment
Ciba ® IRGACURE ® 2022
Photoinitiator
intended.
Edition: 11.6.2003, Basle © Ciba Specialty Chemicals Inc. Page 4 of 1