Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Compositions to be polymerized by wave energy wherein said...
Reexamination Certificate
2007-01-23
2007-01-23
Berman, Susan (Department: 1711)
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Compositions to be polymerized by wave energy wherein said...
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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Ferbitz Jens
Gaudl Kai-Uwe
Grahe Gerwald F.
Guanghui Wu
Jing Yu
Armstrong Kratz Quintos Hanson & Brooks, LLP
Berman Susan
Dainippon Ink and Chemicals Inc.
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