Photoinitiator, novel compound, and photocurable composition

Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Compositions to be polymerized by wave energy wherein said...

Reexamination Certificate

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C522S107000, C522S182000, C522S183000

Reexamination Certificate

active

10507209

ABSTRACT:
A photoinitiator is provided which exhibits excellent photosensitivity, yields colorless products, and is usable in thick layer UV curable coating. A novel chemical compound is also provided which is usable for the photoinitator. Photocurable composition is also provided which has these properties. The photoinitiator consists essentially of a compound having a molecular weight of 1000 or less, and having a chemical structure represented by the following formula (1),wherein R3and R4independently denote a specific alkyl group, and R1and R2independently denote an electron attracting group or a specific alkyl group, and weight percentage of a chemical structure element represented by the following formula (2),which is expressed in formula (1) based on the total molecular weight of the compound, is 17% to 54% by mass.

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