| abstract |
The present invention relates to a coumarin (keto)oxime ester compound of formula (I), wherein n and R 1 , R 2 , R 3 , R 4 , R 5 , R 6 and R 7 are as defined in the specification. The compound has strong UV absorption in the range of 300-450nm. After absorbing light energy, it can rapidly transfer energy and continuously initiate polymerization. It has obvious advantages in terms of photosensitivity and pattern integrity, and is very suitable for UV-LED light source radiation curing. . In addition, the compounds of formula (I) also have good thermal stability. The present invention also relates to the preparation method of the compound of formula (I) and the use of the compound. The compound is suitable for use as a photoinitiator in a UV-LED photocuring system, and is suitable for the radiation wavelength of UV-LED photocuring. |