Basic Chemistry of UV Systems

Aii UV-cured systems are based on an addition cure poiymerisation whereby a free radical or cation adds to a carbon-carbon double bond or an oxirane ring and a chain reaction leads to formation of a polymer. The combination of monofunctional and multifunctional monomers or oligomers gives rise to crosslinking reactions, which contribute strength, heat resistance, and fluid resistance to the formulations. [Pg.30]

Although commercial formulations contain many components, the essential elements of a UV system are the monomer (or functional oligomer), the photoinitiator and the source of UV energy. [Pg.30]

Oligomers Urethane vinyl ethers Epoxy acrylates [Pg.31]

Photoinitiators Aryl sulfonium salts Benzoin ethers [Pg.31]

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