The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jun. 24, 2003
Filed:
Oct. 06, 2000
Kazuhiko Nakamura, Tokyo-to, JP;
Shunsuke Sega, Tokyo-to, JP;
Dai Nippon Printing Co., Ltd., Tokyo-to, JP;
Abstract
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.