(3) Features and functions
1. It has good solubility with oligomers and reactive diluents.
2. Absorption at 269 nm, 298 nm, 379 nm, and 393 nm, and the longest absorption wavelength is 430 nm.
3. The photolysis product is a trimethylbenzoyl radical and a diphenylphosphonyl radical, which are highly active and can initiate polymerization.
4, with photo-bleaching effect, suitable for thick film deep curing, low volatilization, can make the coating non-yellowing, mostly used in white systems. 5, good thermal stability, no chemical reaction occurs when heated to 180 ° C, storage stability is good.
4) Main uses
1. For acrylate systems, especially 1, mainly used for screen printing inks, lithographic inks, flexo inks, wood coatings.
2, mostly used in white systems, TPO can be fully cured on the surface of white or high titanium dioxide pigments.
3, because the coating is not yellow, the post-polymerization effect is low, no residue, can also be used for transparent coating, especially suitable for products with low odor requirements.
Colored systems, usually in combination with amines or acrylamides, and other photoinitiators, to achieve complete cure of the system are particularly suitable for the curing of low yellowing, white systems and thick layers. (The photoinitiator TPO is used in combination with MOB 240 or CBP 393 to improve curing efficiency.)
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