Paint crosslinking agent dyeing

Paint crosslinking agent dyeing

Crosslinking dyeing was mainly aimed at some cannot and covalent bonding fiber combined with dye, direct dye, for example, application of crosslinking agent, crosslinking combining them on the fibre dyeing process.

In recent years, in order to increase the degree of fixation of reactive dyes and the dyeing fastness, also studied a lot of crosslinking agent and crosslinking dyeing process, we also made some research about this.

Crosslinked staining is in fact the use of crosslinking agents, and in the process of reactive dyes, the hydrolyzed dye is linked to the fibers. The number of the hydrolysis of reactive dyes dye sometimes can be as high as 30-40%, not only reduces the utilization rate of dye, also reduced the color fastness, also increases the pollution, based on the hydrolysis of dyes were contains hydrolysis to produce hydroxyl, and the matrix structure and reactive dyes are exactly the same, when dyeing at the same time on the dye adsorption on the fiber.

So use crosslinking agent after they fixation on fiber, light and reactive dyes are exactly the same, fastness is very good also, reactive dyes to dye crosslinking agent is, in fact, the use of some body hair does not contain the reactive dyes, containing two or more active group, performance and reactive dye approximation, application process is exactly the same.

After the application of crosslinking agent, most can be hydrolyzed dye fixation on fiber, the wet rubbing fastness can improve the level 1, this is the research in recent years a new kind of reactive dyes dyeing process.

The principle of contracting and cross-linking applies to two types of products: two-component silicon rubber (RTV - 2), silicon rubber (RTV - 1).

Condensation cross-linking advantage: the resistance to polymerization that may be caused by other compounds is generally not sensitive; The adhesive and sealant are extremely durable.




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


Single component silicon rubber (rtv-1) requires air moisture during solidification, and when the environment is dry, the increase of moisture can significantly reduce the speed of solidification.

The condensing crosslinked two-component silicon rubber (rtv-2) must be kept below 90 degrees Celsius before it is fully cured, or there may be an anti-sulphur phenomenon.

A stable modified water-based polyurethane emulsion was obtained by adding an internal crosslinking agent with modified water-based polyurethane.

(1) the raw material toluene 2, 4 diisocyanates (TDI), industrial products; Polyether polyols, industrial products; Two, two, two, two, two, two, two, two, two, two, two, two, two, two, two, two, two, two, two, two, two, The analysis of the pure; Triethylamine (TEA), chemically pure; Trimethylpropane (TMP), chemically pure; 1, 4, 1, 1, 1, 2 alcohol, chemical pure; Acetone, chemical purity.

(2) the preparation of modified waterborne polyurethane emulsion preparation process consists of the performed, chain extender, neutralization, emulsification, steaming solvent step 5, will join the three bottles of polyether glycol, 110 ℃ (0.02 MPa) vacuum dehydration 1 h, joined by the measurement of TDI reaction 2 h heating to 70 ~ 80 ℃, cooled to 40 ~ C join TMP, and drops of DMPA - acetone solution, heating up to 60 ℃, the reaction for 2 h, cooled to 40 ~ C, TEA neutralization (30 min), add a moderate amount of deionized water (add and strongly mixing) emulsion, crosslinking modification of waterborne polyurethane, removing acetone under reduced pressure.

It is often a substance containing many functional groups, such as organic diacid, polyol, etc. Or molecules containing multiple unsaturated double bonds, such as diethylbenzene and diisocyanate, N, n-methyl-diacrylamide (MBA), etc. It can be made with monomer to be condensed (or polymerized) to a certain degree of cross-linking, making the product into an insoluble cross-linked polymer; Also can keep a certain number of functional groups in linear molecules (or double bond) and then add certain substances to crosslinking, such as the curing of phenolic resin and rubber vulcanization, etc.

Copyright: Zhang Jia Gang YaRui Chemical co.,Ltd 

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