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AssigneeDai Nippon Printing Co., Ltd.
InventorsKazuhiko Nakamura, Shunsuke Sega
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An object of the present invention is to provide a high photo-sensitivity curable resin. And another object is to prevent the viscosity increase, or to improve the transparency of said photo-curable resin, if necessary. An isocyanate compound containing a radical polymerizable group is reacted with a raw material polymer having a principal chain comprising an unit having an acid functional group and an unit having a hydroxyl group in the irate of 1.0 or more in terms of the equivalent ratio of the isocyanate group to the hydroxyl groups in said principal chain (NCO/OH). Moreover, when a raw material polymer is produced, its transparency is improved by using an azo polymerization initiator of non-nitrile series or a peroxide-based polymerization initiator. Use of any polymerization inhibitor selected from the groups of compounds shown in formula (9) or formula (15) can also improves transparency when introducing the isocyanate compound into the raw material. Furthermore, viscosity increase can be prevented by treating a photo-curable resin with alcohol. A color layer, protection film, and column-shaped spacer are formed using said photo-curable resin.
A high photo-sensitivity curable resin comprising a polymer having a principal chain which comprises a constitutional unit having an acid functional group and a constitutional unit having a hydroxyl group, wherein an isocyanate compound containing a radical polymerizable group is amide-bonded with at least a part of said acid functional group via an isocyanate group of the isocyanate compound and/or urethane-bonded with at least a part of said hydroxyl group via the isocyanate group of the isocyanate compound, and the feed amount of said isocyanate compound containing the radical polymerizable group is 1.0 or more in terms of the equivalent ratio of said isocyanate group to said hydroxyl group in the principal chain (NCO/OH).
A high photo-sensitivity curable resin comprising a polymer having a principal chain which comprises a constitutional unit having an acid functional group and a constitutional unit having a hydroxyl group, wherein an isocyanate compound containing a radical polymerizable group is amide-bonded with at least a part of said acid functional group via an isocyanate group of the isocyanate compound and/or urethane-bonded with at least a part of said hydroxyl group via the isocyanate group of said isocyanate compound, the introduced amount of said isocyanate compound containing the radical polymerizable group to 100 mol of said constitutional unit of the principal chain is 8 mol or more when measured with 1H-NMR after removing components of 5,000 or less in molecular weight.
A production method of a high photo-sensitivity curable resin, wherein an isocyanate compound containing a radical polymerizable group is reacted with a raw material polymer having a principal chain comprising a constitutional unit having an acid functional group and a constitutional unit having a hydroxyl group at the rate of 1.0 or more in terms of equivalent ratio of the isocyanate group in said isocyanate compound to the hydroxyl group in said principal chain (NCO/OH).
Dependencies are inferred from the claim text.