Cycloaliphatic epoxysiloxane prepolymer (PDMS-PHMS) was synthesized by a simple one-step hydrosilylation reaction using polydimethylsiloxane-co-methylhydrogensiloxane and 4-vinyl 1-cyclohexene-1,2 epoxide (VCHO). The structure of the synthesized epoxy polysiloxane oligomer was characterized by Fourier transform infrared spectroscopy (FTIR) and 1H NMR spectroscopy, which confirmed the successful synthesis of the prepolymer. Adding an appropriate amount of cationic photoinitiator, the epoxy polysiloxane prepolymer undergoes cationic polymerization and cures rapidly under the irradiation of ultraviolet light, and obtains a series of epoxy polysiloxane resin films. The properties of these cured films were measured by various techniques such as UV transmittance, thermogravimetric loss analysis as well as contact angle and pencil hardness. The results showed that the surfaces of these films were uniform and transparent, and these films had excellent heat resistance, acid resistance, hydrophobicity and ink removal performance. In addition, the effect of cycloaliphatic epoxy monomer content on the curing behavior and network properties was explored. This study reveals that the cure rate increases with the amount of grafted cycloaliphatic epoxy monomer and that a denser crosslinked network provides the resulting film. Finally, the photocurable silicone material studied in this paper is simple to prepare, has excellent performance, and has potential application prospects in the field of antifouling coatings.

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