Classification of Solvent Dyes

1
Classification of Solvent Dyes
2
Introduction

• Solvent dyes are a class of dyes that are soluble
  in organic solvents. And the dye structure
  contains less or no hydrophilic groups, so the
  solvent dye is insoluble in water but soluble in
  different types of organic solvents. Solvent dyes
  are used for dyeing organic solvents, hydrocarbon
  fuels, waxes, lubricants, plastics, and the like.

3
Classification

• According to the composition and structure,
  solvent dyes can be classified into the following
  types

4
Basic dyes

• Such solvent dyes include Yellow 34, Orange 3,
  Red 49, Violet 8, Violet 9, Green 1, Brown 41 and
  so on. These solvent dyes remove the -CL from the
  basic dye structure to from a free base form,
  increasing its solubility and stability in the
  solvent. Such solvent dyes are generally used in
  the dyeing of oils, re-wrapping bags, packaging
  bags and resins. Some solvent dyes are also used
  for the coloring of ball-point pen oils and
  plastics. Due to the low thermal stability and
  poor weather resistance of this type of solvent
  dyes, their use range is limited.

5
Complex precipitation of basic dyes with acid dyes

• The varieties of such dyes are Solvent Red 109
  (obtained by co-precipitation of Acid Yellow 99
  and Basic Violet 10) Solvent Red 35 (obtained by
  co-precipitation of Acid Violet 58 and Basic
  Violet 10) Solvent Red 229 (obtained by
  co-precipitation of by Acid Yellow 23 and basic
  red 1) solvent violet 2 (obtained by
  co-precipitation of acid violet 56 with basic
  violet 10). These dyes are obtained by the
  reaction of an anionic acid dye and a cationic
  basic dye. This reaction makes such dyes
  electrically neutral, increases their solubility
  in solvents, and improves their heat resistance
  and weather resistance. These dyes are very
  soluble in alcohol solvents and are high-grade
  dyes for clear lacquers and inks.

6
Metal complex solvent dyes

• The metal complex solvent dye is a metal complex
  which is soluble in an organic solvent. It is a
  complex of 11 and 12 azo and metal with no or
  less hydrophilic groups. The varieties of such
  solvent dyes include Solvent Yellow 21 Orange
  45, 54, 56, 62 Red 8, 100, 122 Black 27, 34,
  35 and the like. These dyes are composed of
  acidic metal complex structures, which have good
  thermal stability, heat resistance (about 200C),
  acid resistance, alkali resistance and light
  fastness. They also have good solubility in
  solvents, so they can be used for the dyeing of
  high-grade furniture transparent paint,
  automotive paints, plastic and polyester
  protoplasm.

7
Disperse dyes

• Such dyes incorporate a long-chain alkyl compound
  based on the structure of the disperse dye to
  increase the solubility of the disperse dye in
  the solvent. There are many varieties of such
  solvent dyes, including Disperse yellow 1, 3, 4,
  11 Disperse orange 3, 11, 13, 25 Disperse red
  1, 5, 9, 15, 22, 98, 227 Disperse violet 1, 4,
  26, 28 Disperse blue 1, 7, 14, 19, 134. The
  disperse dye itself is insoluble in water, but
  when a long-chain alkyl group compound is
  introduced, its solubility in a solvent is
  increased. They are widely used in the coloring
  of plexiglass, plastic, ABS resin, and polyester
  protoplasm.