Non-dustable granular dye: dye particles coated with hydroxylpropyl cellulose or carbohydrate

DETAILED DESCRIPTION What is claimed is: 1.
A non-dustable granular dye composition which comprises dye particles in granular form coated with a monosaccharide, an oligosaccharide or hydroxypropyl cellulose.
2.
The non-dustable granular dye composition according to claim 1, wherein the oligosaccharide in sucrose.
3.
A process for producing a non-dustable granular dye composition comprising the steps of mixing a powdery dye with a blinding agent, converting the mixture to granular form, and coating the dye granules thus formed with a monosaccharide, an oligosaccharide or a hydroxypropyl cellulose.
4.
The process according to claim 3 wherein the coating agent containing the monosaccharide, the oligosaccharide or the hydroxypropyl cellulose is sprayed onto the dye granules while blowing hot air at a temperature between 40.
degree.
to 100.
degree.
C.
5.
The process according to claim 3 wherein the powdery dye is mixed with an aqueous binder solution to obtain amixture and the mixture is dried and converted to the dye granules of predetermined size and shape.
6.
The process according to claim 4 wherein the size of the dye granules lies in the range between 0.
2 to 5 mm and 100 parts by weight of the dye granules are coated with 0.
1 to 5 parts by weight of the monosaccharide, the oligosaccharide or the hydroxypropyl cellulose.




Description:
TECHNICAL FIELD The present invention relates to a dye having a specified form.
More particularly, the invention relates to a non-dustable granular dye coated with a specified chemical agent.
BACKGROUND ART Dyes have hitherto been commercialized in a wet state such as liquids, pastes, etc.
or in a dry state such as grains, powders, etc.
Particularly, those dyes which are difficult to convert into liquids or pastes because of decomposition or the like in a wet state, such as reactive dyes, have been commercialized mainly in a dry form.
Powdery dyes, however, are liable to generate the problem of flying away, or dusting, when being handles, with the result of adhesion to equipment or the workers, thereby worsening work environment