Solvent Black 7, also known as oil-soluble aniline black, it is a dye and pigment, black ultrafine particles, soluble in grease and paraffin. It is mainly used for rubber shoes bright oil, can also be used for latex. It can be prepared by aniline, nitrobenzene and hydrochloric acid in the presence of ferric chloride by high temperature compression and then by alkali neutralization.

Solvent Black 7, also known as oil-soluble aniline black, it is a dye and pigment, black ultrafine particles, soluble in grease and paraffin. It is mainly used for rubber shoes bright oil, can also be used for latex. It can be prepared by aniline, nitrobenzene and hydrochloric acid in the presence of ferric chloride by high temperature compression and then by alkali neutralization.

Oil-soluble aniline black is a kind of black dye which is produced directly on cotton fabric and insoluble in common solvents. It is widely used in dyeing and printing of cotton fabrics. When dyeing, the cotton fabric is first immersed in a solution made of aniline salt, etc., and then oxidized to be dyed black. The dyed product is resistant to sun and rain and is firm to hot soap solutions and dilute bleach solutions. When oxidized, it is blue-black and easy to cause brittle damage. Insufficient oxidation or can be reduced to green. Mainly used for coloring ink, grease, rubber toys and plastic products; Used for coloring furniture paint, shoe polish, floor wax, car wax and grease; Used for polyolefin, heat resistance up to 200 ℃, blooming phenomenon occurs in soft PVC over a certain concentration; It can also be used for coloring elastomer and rubber. It can be used for coloring viscose fiber and viscose sponge (viscosesponges) virgin pulp with light resistance of 4-5 grade.

Specific applications are as follows:

1) Prepare an alcohol-soluble black dye formulation with high color strength, low viscosity and high tinting strength, the formulation includes: a)20-45wt% propanol solvent; B) 30-35wt% oil-soluble aniline Black; c)20-40wt% carboxylic acid; d)1-6wt% dye; e)1-3wt% alkaline crystal violet, methyl violet base, or a mixture thereof; and f) selectively, 0-5wt% of the ester co-solvent. The dye formulation is particularly suitable for writing instruments such as felt nibs and jewel pens.

2) Preparation of a mildew-proof black shoe polish, characterized in that it comprises the following components in parts by weight: 20-30 parts of walnut oil, 15-20 parts of tea tree oil, 2-5 parts of oxidized polyethylene wax, 5-10 parts of crude montan wax, 20-30 parts of eucalyptus oil, 1-5 parts of oil-soluble aniline black, 1-2 parts of basil extract, 5-10 parts of mildew inhibitor and the balance of water. The mildew-proof black shoe polish is applied to leather shoes, which volatilizes quickly, is not easy to dye gray, has good gloss and can prevent moldy leather shoes.