STUDY ON THE PHOTOSENSITIVITY OF CATIONIC PHOTOINITIATOR BF4

doi:10.7517/j.issn.1674-0475.2003.01.46

Abstract

Abstract: The cationic photoinitiator BF₄ was synthesized and the photosensitivity in epoxide oligomer was studied. There are two main absorptions above 300 nm (λ_max =355 nm and 620 nm) which extend to the visible region, So it can well match with high pressure arc. lamp. The optimized photosensitivity in epoxide is 41.8 mJ/cm² when irradiated by 365 nm UV ray, which is better than that of other cationic photoinitiators. The best concentration of BF₄ in the system of ERL-4221+EPON-812 is 3%-5%. Because of the strong post curing ability, the system of ERL-4221+EPON-812 can obtain complete curing with 1% BF₄. BF₄ is easier to be synthesized than other cationic photoinitiators,so it will be used widely in the future.

Key words: cationic photoinitiator, BF₄, epoxide, photosensitivity, post-curing

CLC Number:

TQ572

WANG Tao, HUANG Yu-li, MA Li-jun, SHI Lei. STUDY ON THE PHOTOSENSITIVITY OF CATIONIC PHOTOINITIATOR BF₄[J]. Imaging Science and Photochemistry, 2003, 21(1): 46-52.

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STUDY ON THE PHOTOSENSITIVITY OF CATIONIC PHOTOINITIATOR BF₄

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