Solvent dye in Chemicals

Dye refers to the substances that can make other substances get colors, such as fibers. In ancient time, paint is extracted from plants and animals. China is one of the first countries to use natural dyes. Indigo, alizarine and Carmine are the earliest application of natural dyes in ancient China. Modern industrial production of organic dyes are for more than 100 years of history. First synthetic aniline purple dye was synthesised by United Kingdom chemist Perkin in 1856, which used for dyeing of wool and silk. Germany chemist invented VAT blue (the so-called Indanthrene blue RS) in 1901, and in 1956 there was reactive dyes.

Since the 60 's, with the appearance of synthetic fibers, the development of various types of dyes are promoted. There are more than 1000 kinds of dye applied into use so far, they are and almost completely replaced natural dyes. Dyes are classified into azo dyes, carbonyl dyes, reactive dyes, aromatic methane dye and phthalocyanine dyes according to the structure; dyes can also classified into acid dyes, direct dyes, solvents dyes and VAT dyes, disperse dyes, etc according to the application methods.

Solvent dye itself is not soluble in water but soluble in oil or organic of Los agent dye. Solvent dye can be divided into oil soluble and alcohol-soluble two broad categories. Dyeing fastness is one of the most important quality of dyed finished products. Low dyeing fastness is easily color faded, high dyeing fastness is contrary. Dyeing fastness largely depends on its chemical structure. In addition, dyes on the fiber of physical condition, the degree of dispersion dye, dyeing method, etc also have a significant impact.

As to the solvent pigment ink, it needs further standardization, specialization, and environmental protection. Some product specifications, safety indicators should be ruled. Solvent based inks are currently focusing on those efforts. As a result, the high corrosion resistance and strong solvent ink slowly will be replaced in the future. Oil based pigment ink is limited to certain special applications, such as the oil industry.

At the beginning, solvent dye is named so because it can be dissolved in organic solvents. We usually call the dye that can dissolve in non-polar or low-polarity solvents as oil dye. Usually solvent dyes for plastics application is limited to the amorphous polymers coloring, such as polystyrene, polycarbonate, polyester, gathers non-record vinyl, etc. But the consumption of solvent pigments in plastics industry is great. View more.