The new pigment printing is used crosslinking agent

The new pigment printing is used crosslinking agent.

Pigment printing is one of the most widely applied printing methods. Pigment printing the main effect of crosslinking agent is to improve the adhesive force of solid color, namely when the adhesive curing, make polymer, low molecular crosslinking form a three-dimensional network structure, so that the membrane elastic, and improve the color fastness.

At present, the production of pigment printing in China is used for the condensation of diamine and epoxy chloropropane, such as domestic EH, FH, 2D resin, modified cyanaldehyde resin etc.

This article chose the diethylenetriamine, three ethylene tetramine, three, four ethylene amine monomer respectively new crosslinking agent was synthesized with epoxy chloropropane, and a preliminary discussion on the synthetic conditions and performance.

New crosslinking agent synthesis. To a certain amount of diethylenetriamine, three ethylene tetramine, four ethylene amines were put in three neck flask, add a certain amount of epoxy chloropropane, mixing, reaction 2 h, control a certain temperature for a quick polycondensate crosslinking agent, and then use hydrochloric acid to adjust the pH value of the product, synthesis of crosslinking agent. The equation is as follows:

The synthesis of EH. Adipic amine solution in 55 ~ 60 ℃ under drip into the epoxy chloropropane, thermal reaction 2 h, after cooling to room temperature pH for 2 ~ 3 in the key of hydrochloric acid

Crosslinking degree measurement. The new crosslinking agent will be added to the printing paste by 2%, and it will be placed on glass and dried. After dry film is put into the oven, in different temperature crosslinking 1 h, remove the cooling, weighing, and then put in a beaker of ethyl acetate, let stand for 24 h, with filter paper blot residual ethyl acetate, weighing.

Calculate the crosslinking degree by the following formula.

Vr = 1 / [1 + (MB/ma - 1) rho r over (w rho s)]

The representation of the virtual reality in the form of Vr;

The mass of the Megabyte sample.




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


Ma samples of pre-expansion mass;

Rho r crosslinked film density;

Density of the solvent of rho s;

The quality score of the crosslinking agent in w formula.

Application test. Printing color formula: paint K - B color blue in moderation; Crosslinking agent 2%; Emulsion slurry 10 g bond.

Print on white fabric, steam and fix, test soaps, sun fastness, and compare color quantity.

Infrared spectroscopy analysis. From the infrared spectra of the synthetic crosslinking agent, we know that the structure contains OH, -nh, c-cl, etc.

The effect of crosslinking agent on the performance of crosslinking is the effect of the reaction temperature

The effect of the reaction temperature on the performance of the crosslinking agent was determined by the determination of diethylene triamine, triethylene tetramine and tetramine.

When the reaction temperature is lower than 15 ℃, low crosslinking degree, poor performance of crosslinking agent, this is caused by incomplete reaction; When higher than 15 ℃, violent reaction, side effects, also led to the decrease of the degree of crosslinking. The best reaction temperature of 15 ℃ or so.

Copyright: Zhang Jia Gang YaRui Chemical co.,Ltd 

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