Black Color Former S-205 CAS 70516-41-5 For Thermal-sensitive Dye And Recording Materials

It is a black fluorescent alkane-based thermal pressure-sensitive dye. Black fluorescent alkane-based thermal pressure-sensitive dyes are compounds with a parent structure of the xanthene type. It is usually colorless or light-colored crystals, and when it comes into contact with color developers (acidic white clay, bisphenol A, POB, etc.), it develops color as the lactone ring inside the molecule cracks. Because of its high sensitivity, high color density, good stability, the introduction of different substituents on the fluorescent alkane parent and show a different color is widely used in the manufacture of thermal recording paper, black is currently one of the most important varieties of thermal pressure-sensitive dyes.

3-N-isopentyl-N-ethylamino-6-methyl-7-phenylamino fluorescent compounds with melting points ranging from 164 to 168°C, as a colorless or light-colored color-forming agent, produce colored compounds under the initiation of Lewis acid or color initiator, and under the action of heat or pressure, and this phenomenon has been widely used in the field of heat- or pressure-sensitive recording materials.

3-N-isopentyl-N-ethylamino-6-methyl-7-phenylamino fluorescent is a color-forming agent with excellent performance, and the fluorescent compound has two different crystalline forms, a high-melting point crystal with a melting point in the range of 164-168°C, and a low-melting point crystal with a melting point in the range of 145-156°C. In these two different crystalline forms, the fluorescent compound has a high melting point, and a low melting point, and a low melting point, and a low melting point, and a low melting point. Among these two different crystal types, as a color-forming agent in thermal or pressure-sensitive recording materials, the high melting point crystalline compound has the advantage of fast color development and is not easy to fade.