New pyrazolone compound and eye plastic lens made therefrom

Application Number: 00117857
Application Date: 2000.04.07
Publication Number: 1290699
Publication Date: 2001.04.11
Priority Information: 1999/4/7 JP 99685/99
International: B29C39/00;B29D11/00;C07D231/18;C08F226/00;C09B62/00;G02C7/04
Applicant(s) Name: Hoya Healthcare Corp.
Address:
Inventor(s) Name: Iwamoto Hidehisa
Patent Agency Code: 72001
Patent Agent: pang lizhi
Abstract The invention relates to a novel pyrazolone compounds which have excellent copolymerizability and undergo no elution in an organic solvent when used for an ophthalmic plastic lens and which have an excellent absorption peak in visible light region and function as a reactive yellow dye.