REACTIVE DYES TYPE AND STRUCTURE

1、 Dichlorotriazine

Dye characteristics:

Dichlorotriazine type reactive dyes were the earliest invented reactive dyes. Tracing back 20 years, low-temperature dyes such as X-R yellow, X-3B red, and X-BR blue were representative of reactive dyes. Of course, there was also a familiar dye factory called Shanghai Dyeing and Chemical Eighth Factory.

Dichlorotriazine type reactive dyes are reactive, but the biggest problem is that they are prone to hydrolysis and have poor uniformity. The dye undergoes hydrolysis during storage and has now been phased out by medium to high temperature reactive dyes.

Representative dyes:

Shanghai Dyeing and Chemical Factory No. 8 X-type.

Note: In memory, X-3B red is the most easily hydrolyzed

(The chimney of the former Shanghai Dyeing and Chemical Eighth Factory)

2、 Monochlorotriazine:

Dye characteristics:

Monochlorotriazine is a high-temperature reactive dye that replaces a chloride ion on the triazine ring with - NHR (or alkoxy), which reduces reactivity and improves stability. However, the pH and temperature of dyeing need to be increased.

Representative dyes:

The K-type from Shanghai Dyeing and Chemical Plant 8, the E-type from Huntsman (formerly Cibatron E from Ciba), the Dymarene XN from Angao (formerly Drimarene XN from Clariant), the Procion H type from Desda (formerly Procion H from Imperial Chemical), and the Rifatron HE from Lihe, South Korea.

Note: The experience of Procter&Gamble H was quite bumpy. Firstly, the dye division of Imperial Chemical established Jelicon, which was then acquired by BASF. BASF's dye division was then acquired by Desda, which was later acquired by Longsheng.

3、 Monofluorotriazine:

Dye characteristics:

Replacing monochlorotriazine with F for coloring Cl improves reactivity, increases fixation rate, and correspondingly enhances various fastness properties. Of course, it is also difficult to remove the dye of monofluorotriazine.

Representative dyes:

Huntsman's F-type (formerly known as Cibatron F) and DeStar's Levafix EN.

4、 Trichloropyrimidine:

Pyrimidine is a triazine structure with low reactivity but the highest stability. It is the least prone to hydrolysis, acid and high temperature resistant, and can be dyed at 90 ° C. It reacts with fibers to form ester bonds and is generally alkali resistant, making it suitable for use as a post silk dye.

Representative dye: Ango's Drimarene X (formerly known as Clarine Drimarene X).

5、 Difluorochloropyrimidine:

Dye characteristics:

On the basis of trichloropyrimidine, replacing two chlorides with two fluorides results in higher stability and fastness of the dye, and higher reactivity than trichloropyrimidine. It belongs to moderate reactivity and has good fixation rate, making it a high-end product among dyes.

Representative dyes:

Angao's Drimarene K (formerly Clariant's Drimarene K) and Desda's Levafix EA.

6、 Dichloroquinoline:

Dye characteristics:

The characteristic is that it can fix color at a low temperature of 40-50 ℃, but it is not acid resistant. Under acidic conditions, it is easily hydrolyzed and the reaction is active.

Representative dyes:

The Levafix E model from Desda.

7、 Ethylene sulfone group:

Dye characteristics:

Ethylene sulfone based reactive dyes have a reactivity between dichlorotriazine and monochlorotriazine, and are intermediate temperature reactive dyes. The characteristic is that it is acid resistant but not alkali resistant, so a pre alkali process can be used during dyeing. Ethylene sulfone based dyes have bright colors, and the most commonly used dye, Yanlan R, is one of the representative dyes.

Representative dyes:

Shanghai Dyeing and Chemical Factory No. 8 KN type, Taiwan Everzol, Desda Remazol, Japan Sumitomo Sumfix, South Korea Kyungin Kisconazole VS, etc

8、 Monochlorotriazine&vinyl sulfone group:

Dye characteristics:

The representative of dual reactive dyes and the most widely used type of reactive dye nowadays. The complementary properties of monochlorotriazine and vinyl sulfone are high reactivity, bright color, high fixation rate, easy washing, good fastness, and high compatibility and reproducibility of ternary colors. It is an essential dye for dyeing factories!

Representative dyes:

Shanghai Wande B-type, Shanghai Dyeing and Chemical Eighth Factory M/ME type, Taiwan Everzol, Desda Remazol, Japan Sumitomo Sumfix Supra, South Korea Kyungin Kisconazole HF, etc.

Note: Shanghai Wande should be the earliest company in China to promote dual reactive dyes

9、 Monofluorotriazine&vinyl sulfone group:

Dye characteristics:

Monofluorotriazine and vinyl sulfone dual reactive dyes have higher reactivity than monochlorotriazine and vinyl sulfone dyes. The dyes have lower directness, higher solubility, stronger reactivity, better transfer and washability than ordinary reactive dyes. They are alkali resistant, peroxide resistant, and have high fastness. They are really masters in dyeing materials!

Representative dyes:

Original Ciba Clone C-Type

10、 Dichlorotriazine:

Dye characteristics:

Double chlorine triazine reactive group dye is a type of dye in which two chlorine triazine reactive groups are attached to a dye macromolecule, increasing the chance for the dye to react with fiber hydroxyl groups. It has high affinity, fixation rate, good diffusion, transfer, uniformity, and color fastness, and is suitable for dyeing at 80 ° C and 90 ° C. Its alkali resistance is good, so it can be used for fiber dyeing after silk finishing.

Representative dyes:

Shanghai Dyeing and Chemical Plant No. 8 ME type, Taiwan Yongguang HE, Original Ciba Clone E type, Destar's Pushan HE/HEXL, South Korea's Gyeongin HL, Shanghai FAPU HEXL, etc.

11、 Other types:

Bis (trifluoromethyl) triazine, representative dye: Huntsman's LS type (formerly known as Cibarone LS);

Diethylene sulfone group, representing dye: Levafix from Dexter;

Multi reactive groups (monochlorotriazine, monofluorotriazine, vinyl sulfone, etc.), representative dyes: Huntsman's HW type (formerly known as Cibaroline HW).