21811-64-3

Upstream product

• 106-50-3 1,4-phenylenediamine 
• 108-95-2 phenol 
• 122-80-5 N-acetyl-p-phenylenediamine 
• 103-18-4 4-amino-4'-hydroxyazobenzene 
• 1435-60-5 4-(4'-hydroxyphenylazo)nitrobenzene 
• 14368-49-1 p-nitrobenzenediazonium 

Relevant academic research and scientific papers

Bisazo bisphenol-containing compound and preparation method thereof

The invention provides a preparation method of a bisazo bisphenol-containing compound. The preparation method of the bisazo bisphenol compound provided by the invention comprises the following steps of dissolving an aniline compound in a strong acid aqueous solution to obtain an amine salt solution, adding an aqueous solution of sodium nitrite into the amine salt solution to obtain a diazonium salt solution, dissolving a phenol compound in a strong alkali aqueous solution to obtain a phenate solution, wherein the ortho-position of the hydroxyl group of the phenol compound is not provided with a substituent group, and adding the diazonium salt solution into the phenate solution to obtain a solution containing the bisazo bisphenol compound. The preparation method of the bisazo bisphenol compound, provided by the invention, is high in production efficiency and yield and low in production cost.

Yellow-to-orange bisazo disperse dye and preparation method thereof

The invention relates to a disperse dye, in particular to a yellow-to-orange bisazo disperse dye for dyeing and printing polyester fibers and blended fabrics thereof and a preparation method of the yellow-to-orange bisazo disperse dye. The invention provides the bisazo disperse dye which is higher in color development power and high in dyeing degree, namely high lifting power and exhaustion dyeing rate, and the preparation method meeting the green and environment-friendly requirements. The chemical structural general formula of the bisazo dye is shown in the specification.

COLORING COMPOSITION, DICHROIC DYE COMPOUND, LIGHT ABSORPTION ANISOTROPIC FILM, LAMINATE, AND IMAGE DISPLAY DEVICE

A dichroic dye compound has an excellent alignment property when used in a light absorption anisotropic film, and has excellent solubility. A coloring composition contains the dichroic dye compound having a structure represented by Formula (1). In Formula (1), A and B represent a crosslinkable group, a and b are 0 or 1, and a+b is not less than 1. L1 and L2 represent a monovalent substituent, a single bond, or a divalent linking group. Each of Ar1 to Ar3 represents an aromatic hydrocarbon group or heterocyclic group. R1 to R3 represent a monovalent substituent. k represents an integer of 1 to 4. n1, n2, and n3 represent an integer of 0 to 4. In a case where k is 1, n1+n2+n3 is not less than 0, and in a case where k is not less than 2, n1+n2+n3 is not less than 1.