Photoinitiator (PI) CAS 162881-26-7  is a key component of UV curing materials, which plays a decisive role in the speed of UV curing of UV curing materials. Photoinitiator is a substance that can absorb radiation energy, undergo photochemical changes upon excitation, and produce active intermediates (free radicals or cations) with the ability to initiate polymerization. Photoinitiators can be divided into ultraviolet initiators (absorbing UV light at 250-4Chemicalbook20nm) and visible initiators (absorbing visible light at 400-700nm) due to their different absorption of radiation energy. Photoinitiators can be divided into two categories: free radical photoinitiators and cationic photoinitiators due to the different active intermediates produced. Free radical type photoinitiators can be divided into two types due to their different mechanisms of generating free radicals: cracking type photoinitiators and hydrogen withdrawing type photoinitiators. At present, the main UV curing technology is UV curing, and the photoinitiator used is UV photoinitiator.

Specification

Appearance: Pale Yellow to Yellow Powder

Melting point: 131-135 ° C

Boiling point: 590.0 ± 60.0 ° C

Density: 1.17 ± 0.1 g/cm3

Vapor pressure: 0Pa at 20 ℃

Application

Photoinitiator 819 can also be used for colored UV cured plastic coatings. UV coatings have been widely used on plastic shells of various electronic and household appliances products due to their excellent performance and efficient production. However, the deep curing of UV coatings after coloring is not good, resulting in poor adhesion of the Chemicalbook film and poor dispersion and arrangement of pigments by UV resin, which seriously affects the appearance of the coating film, Therefore, the traditional construction process is to first apply solvent based colored primer for coloring, and then apply UV varnish after baking to improve the various physical properties of the paint film surface.

Packing

25kg/bag

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