Reactive Yellow 18

Uses

Reactive Yellow 18 can be used to dye cotton or viscose fibers. Due to its low affinity and fixation rate, it is mainly used for direct printing on cotton, linen, viscose, and silk fabrics, suitable for both light and dark shades. It can also be used for printing on silk fabrics, silk and viscose blends, and vinylon fabrics (the amount and vibrancy are basically the same as on cotton). When dyeing polyester-cotton blends, it can be used alone or in combination with Reactive Brilliant Orange K-GN, Reactive Brilliant Red K-2G, Reactive Brilliant Red K-2BP, and Reactive Brilliant Blue K-GR to dye various medium and dark shades.

Preparation

2-Aminobenzene-1,4-disulfonic acid and 2,4,6-Trichloro-1,3,5-triazine first condensation, and 2,4-Diaminobenzenesulfonic acid second condensation, its product diazo, and 1-(3-Sulfophenyl)-3-methyl-5-pyrazolonecoupling, and then salting-out.

Properties and Applications

colourful green light yellow. Golden yellow powder. The strong sulfuric acid for yellow; In the nitric acid is yellow, no change after diluted. The dye water solution is yellow, with 1 Moore sodium hydroxide solution, continue to add insurance powder and warm, there were no change color, add people had boric acid sodium to colorless. Used for cotton or viscose fiber dyeing, suitable for rolling roll piled up and roll dyeing process. Can be used for cotton or viscose fiber, the dye, direct discharge printing, also can be in silk or viscose filament fabric and printing.

Standard	Light Fastness	Oxygen bleaching		Persperation Fastness		Soaping
		Fading	Stain	Fading	Stain	Fading	Stain
ISO	6	4( red )	5	4	4-5	4-5	5