Additol ITX Isopropyl thioxanthone (2 and 4 isomer mixture) 5495-84-1 Cytec Surface Specialties North America South and Central America Crosslinking / Coupling / Curing Agents Photoinitiator Acrylic/Acrylate Resins Polyester >> Unsaturated Vinyl Inks >> UV / Radiation-curable Coatings >> UV / Radiation Curing Pigment concentrates INKS >> Screen inks INKS >> Lithographic and Offset Inks INKS >> Flexographic inks Additol ITX is isopropyl thioxanthone(2 and 4 isomer mixture). Additol ITX is used a radical photoinitiator in UV coatings and inks. In combination with amine co-initiators or alpha cleavage photoinitiators, it is used in formulations containing unsaturated materials such as acrylates, methacrylates, vinyls and unsaturated polyesters. With exposure to UV light, Additol ITX undergoes a photochemical reaction that generates radicals. These radicals will initiate polymerisation through the unsaturated groups present in the system. Additol ITX is particularly suited to the curing of pigmented coatings and inks. In combinations with tertiary amine co-initiators such as Additol EHA and Additol EDP, it provides good through cure along with surface cure. It is also effective as a sensitizer for alpha cleavage photoinitiators such as Additol DMMTA. PERFORMANCE HIGHLIGHTS Additol ITX is characterised by: Good solubility UV curable formulated products containing it are characterised by: Good through cure The final properties of UV cured products also depend on the selection of other components such as oligomers, reactive diluents and additives. SUGGESTED APPLICATIONS: It is typically used at levels of 0.3-3% by weight based on the reactive components of the formulation. Applications include: Flexographic inks Offset inks Screen inks Pigmented coatings Isopropyl thioxanthone. Exhibits good solubility and good surface and through cure. Used in flexographic, offset, and screen inks and pigmented coatings.