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Study on cross‐linking reaction between acrylic resin and epoxy derivative in over coating layer materials for TFT panel
Author(s) -
Takahashi Shuichi,
Hayashida Mika,
Ogata Tomonari,
aka Takamasa,
Kurihara Seiji
Publication year - 2008
Publication title -
polymers for advanced technologies
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.61
H-Index - 90
eISSN - 1099-1581
pISSN - 1042-7147
DOI - 10.1002/pat.1046
Subject(s) - epoxy , materials science , copolymer , coating , acrylic acid , methacrylate , layer (electronics) , chemical engineering , alkyl , synthetic resin , polymer chemistry , composite material , organic chemistry , polymer , chemistry , engineering
A photoactive over coating layer (OCL) material was prepared by mixing methacrylate copolymer resin, epoxy, and photoactive compounds, separately. The OCL material was found to show long shelf life at room temperature. However, serious lowering of the transparency of the OCL material was caused by post‐baking after alkali development. Microscopic and near infrared spectroscopic studies revealed that the phase separation between the hydrophilic copolymer resin and hydrophobic epoxy compound brought about the formation of wrinkly surface during the post‐baking after the alkali development, and consequently the transparency was lowered by light scattering due to the wrinkly surface. The carboxylic acid derivatives with long alkyl groups were effective for improvement of the transparency without shortening of the shelf life. Copyright © 2008 John Wiley & Sons, Ltd.