On November 29, 1984, Aariin, Kei Masaa; Piitaa, Maachin Koerushu published a patent.Formula: C12H7N3 The title of the patent was Optical filters for photoimaging materials. And the patent contained the following:
Optical filters contain 鈮? dye(s) selected from benzylidene and naphthalimide dyes and a binder composition containing phenol-formaldehyde resin in amount sufficient to cause optical shift in the absorption spectra of the dye(s). The filters are especially useful for UV- and visible light-sensitive photoimaging systems, and especially useful as photog. halation inhibiting layers. Thus, Disperse Yellow 31 60, Butvar B-76 (a butyral resin) 108, Resinox RS 7280 (a phenolic resin) modified with DD1-1410 (a diisocyanate compound) 1440 and MeCOEt 1720 g were mixed to give a halation inhibitor coating composition The experimental process involved the reaction of 2-((1H-Indol-3-yl)methylene)malononitrile(cas: 75629-62-8).Formula: C12H7N3
The Article related to halation inhibitor photog benzylidene dye, naphthalimide dye photog halation inhibitor, binder photog halation inhibiting layer, Radiation Chemistry, Photochemistry, and Photographic and Other Reprographic Processes: Silver Halide Photographic Chemistry and Processes and other aspects.Formula: C12H7N3
Referemce:
Nitrile – Wikipedia,
Nitriles – Chemistry LibreTexts