Disperse red 74 Disperse red H-BGL Disperse red S-R150%
Pošalji upit
Specification:
item
value
CAS No.
61703-11-5
MF
C22H25N5O7
Place of Origin
China
Type
Disperse Dye
Usage
Leather Dyestuffs, Paint Dyestuffs, Paper Dyestuffs, Plastic Dyestuffs, Textile Dyestuffs
Chemical property: purple soy powder. Soluble in ethanol and acetone. The color light of copper and iron ions does not change during dyeing. Maximum absorption wavelength（ λ max)496nm。
Application: Disperse red S-R is used for dyeing polyester cotton blended yarn and polyester knitting yarn by high temperature and high pressure method, and also for direct printing of polyester cotton blended fabric. It has good light fastness and sublimation fastness, and is one of the three primary colors of high temperature disperse dyes. It can match with disperse ruby H2GFL to dye red soy; Dye red brown with disperse yellow brown H2RL; Hot melt and pad dye rust red in the same bath with vat red R. It is also used for dyeing diacetate fiber, triacetate fiber and nylon. Dyeing acrylic fiber can only get light color.
Application: It is mainly used for dyeing and printing of polyester and blended fabrics, as well as for dyeing of acetate fiber and triacetate fiber.
The production method uses m-nitroaniline and p-nitroaniline as the main raw materials. First, m-nitroaniline is ethoxylated with ethylene oxide, then esterified with acetic anhydride, then reduced by catalytic hydrogenation, and propionyl (or acetyl) is formed to obtain coupling components; Then diazotize p-nitroaniline and couple it with the coupling component to obtain the product. The finished product is obtained by filtering, grinding and drying.. The synthesis of coupling components can also be carried out according to the following process:. The following methods are used for the synthesis of domestic dye coupling components:. Add 236kg of water and 38.6kg of m-phenylenediamine (98%) into the acylation pot, raise the temperature to 60-65 ℃, wait until all the materials are dissolved, cool to 28 ℃, add 47kg of hydrochloric acid (30%) dropwise within 2h, maintain 28-32 ℃, continue to stir for 15min, add 52.5kg of refined salt (industrial product), stir for 30min, then add acetic anhydride (90%) dropwise within 28-32 ℃, and keep the temperature for 1h after adding. Filter, wash the filter cake with 15-30 ℃ saturated salt water until the filtrate is colorless for standby. Add the above acylation products and 120kg water into the enamel pot, slowly raise the temperature to 70-75 ℃, stir for 15min, start bubbling and add ethylene oxide (about 50kg) until the reaction endpoint. Then concentrate at 53.3kPa (about 95-100 ℃) until the water content is 15% - 20%. Lower the temperature to 50 ℃, add 17.05kg acetic acid (98%), raise the temperature to 80 ℃ within 0.5-1h, slowly add 125.5kg acetic anhydride (98%), maintain 80-90 ℃, and finish adding within about 2h. Raise the temperature to 95-100 ℃ again, and keep the temperature for 3h until the reaction end point. The coupling component is about 70kg when the temperature is reduced to 25-30 ℃. 32.2kg p-nitroaniline (93%), 79kg hydrochloric acid (30%) and 17.4kg sodium nitrite (93%) were diazotized at 0-5 ℃, and then coupled with the coupling component at 15-20 ℃ for 4-5h to obtain about 63kg dye (dry product).
