On July 15, 1999, Park, Kyung Jae; Oh, In Hwan; Mun, Jae Jun; Jung, Shin Hae published a patent.Formula: C9H10N2O The title of the patent was Method for the preparation of polymeric pigment. And the patent contained the following:
A process for preparing an acrylic based polymer pigment polymerized with a pigment itself by polymerizing an acrylic/azo based pigment monomer with a vinyl monomer is provided, which has excellent coloring property and workability for general plastic and engineering plastic as substantial matrix resin. This process comprises the steps of: preparing raw material for synthesizing 3-nitroacrylanilide by using 3-nitroaniline and acryloyl chloride in acetone as a solvent and sodium hydroxide as a catalyst; reducing 3-nitroacrylanilide using iron/hydrochloric acid in 50% methanol as a solvent; preparing an acrylic/azo based color monomer by reacting 3-aminoacrylanilide with sodium nitrate and coupling with a coupler; and polymerizing the acrylic/azo based color monomer and Me methacrylate. The experimental process involved the reaction of N-(3-Aminophenyl)acrylamide(cas: 16230-24-3).Formula: C9H10N2O
The Article related to acrylic azo polymer pigment preparation, Dyes, Organic Pigments, Fluorescent Brighteners, and Photographic Sensitizers: Other Dyes and Pigments and other aspects.Formula: C9H10N2O
Referemce:
Amide – Wikipedia,
Amide – an overview | ScienceDirect Topics