Halogen acetyl coating crosslinking agent

Halogen acetyl coating crosslinking agent

The most commonly used alpha-halide acetyl group is a halogen acetyl group that can react to the mercap-base reaction at the physiological pH level. In order to ensure the specificity of the reaction of the sulfhydrate, the pH8.5 condition is usually selected, and the haloacetyl group is slightly overdose.

A large amount of halogen acetyl crosslinking agent is associated with non-specific reactions with other amino acids. Imidazole can react with the halogenated acetyl group in pH6.9 minus 7.0, but the incubation time must exceed one week.

In order to inhibit the formation of ionized iodine, the acetyl group reaction should be closed because free halogens can react with tyrosine, histidine and tryptophan residue. The commonly used group of the NHS ester halide acetyl group, including SIA, SIAB and sulfide SIAB, etc.

Reactive printing is mainly through the improvement of printing and dyeing auxiliaries, to strengthen the quality control in production process, so as to improve the handle and colour fastness of pigment printing, make it closer to the reactive printing on quality. In the market, semi-active and affine activity usually refers to a class of things that are called different.

Four ways of identifying active prints and pigment printing:

Look at color: pigment printing color is not bright, colour is dim, give a person a kind of color is float on the cloth the feeling.

See burnish: general pigment printing fabrics have been "calender" before they go out working procedure, to cover the cloth cover the disadvantage of not smooth, so everybody if you see the cloth cover have a deep feeling, that might be the pigment printing. This kind of finish, which is obtained by rolling light, is disposable, and then disappears after washing.

Smell: the pigment printing added a lot of adhesive, and it is not washed by water to be set up directly, so the product will have a strong taste in the fabric.




Chinese name: Diethyl toluene diamine(DETDA)

Diethyltoluenediamine Raw material ：

TDA industrial, Sichuan production

Ethylene (Et) polymer grade, Shanghai production

TEA industrial imports

A reagent grade additives


Touch: paint prints are hard, but it may not work. This is because, in order to cover the defect, the fabric maker added a lot of softener to the set, and the finished product will feel softer after "rolling". Only the softener is washed and most of it will fall off.

Although active printing benefits many, but because of the reason of price, active printing material is in the market to accept the product that is not much inferior to pigment printing. I think the reason for this is that consumers can't intuitively distinguish between active, active, and pigment printing. And the process of coating printing is more and more strong, each index, color fastness is done also more and better.

The activity is good, but give a person feeling still not so much as the coating cost that much.

The adhesive content of coating printing paste is 15% ~ 25%, the heat, exposure to strong light, acid gas and so on can happen premature film. Can add 3% ~ 5% urea, prevent the moisture volatilization in printing and dyeing, prevent premature conjunctival. Glycerin hygroscopicity strong, although the printing paste fluidity and prevent premature hard plug caused by network is good, but will affect the speed and strength of the adhesive film, therefore, must be careful when using, dosage should be controlled.

In some processes, ethylene glycol, or ethylene glycol, is ideal for glycerin. But most of them are better than urea. In order to prevent the pigment printing ink from being exposed to the acid gas, the result is that the coagulation network can be used to increase the stability of the color pulp by adding 1% ~ 2% concentration to 25% of ammonia.

In order to improve the feeling of pigment printing, it is usually appropriate to add the softener, such as domestic organic silicon CGF, in the paste, and the dosage is not more than 2%, otherwise the film will relax and affect the fastness of the skin. Some plasticizers can be added to make the membranes bulking, adding molecules to the relative mobility, improving the feel of the hand and even the depth.

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Diethyl toluene diamine(DETDA)  http://www.yaruichem.com