Coating with n propyl organism compound crosslinking agent

Coating with n propyl organism compound crosslinking agent,N propyl organism and its derivatives is a kind of ternary nitrogen heterocyclic compounds.

Because the nitrogen c organism ring has high reactivity, so has been widely used as reactive intermediates in organic synthesis. Is also used as raw materials of medicine and agricultural chemicals, textiles, paper, leather and so on is the good performance of processing aid and bonding agent of polymer materials. N propyl organism as the main components of the polymer or its copolymer can be used as oilfield chemicals and flocculating agent, n propyl organism polymer (also known as polyethylene imine) used in wastewater treatment and recovery of precious metals have very obvious effect.

Polyurethane coating film white causes and prevention methods

White mechanism of paint film to study from the formation of the paint film. After construction paint, resin and film crosslinking agent through crosslinking reaction. Film consists of film forming material (such as resin and crosslinking agent), synergistic material (such as flow ping agent, dispersing agent, defoamer, flatting agent, etc.), filling material (such as titanium dioxide, etc.).

As the change of time and environmental conditions, the relative stability may be broken, the formation of phase behavior change in the film. Phase behavior change is mainly characterized by the formation of the tiny air sacs, not stereotypes of microcrystalline formation, the formation of tiny sacs, such as the recovery of the phase change is not fully reversible, specific performance for paint film hair grey mist. Another white for water in the air after the reaction with paint incompatible compounds formation and paint.

Paint film whitish reasons:

1, the construction environment air humidity, high temperature, relative humidity was over 80%. Is under construction in wet weather when the paint film at greater risk of white, preventive measures to cool the indoor smoke wet, to improve the dewatering effect of compressed air, or to join the right amount of water.

2, paint film is dry too fast, thinner, low boiling point. Thinner, volatilize rapidly when the water vapor condensation in the air was white in the paint film surface are incompatible. Preventive measures is to improve the paint drying speed, according to the temperature conditions volatile moderate speed of diluent.

More than 3, base material moisture content is too high, more than 14%. Base material of the moisture content is exorbitant, after the film formation, base material of water slowly precipitation, or in the paint film is formed between coating and substrate tiny sacs and make the paint film is pale.




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


Specific performance in the construction of base material moisture and local average moisture content on the high side, compared with water-based adhesive stickers, stick wood, joining together, the bottom water moisture volatilizes not completely immediately after the painting construction.

Preventive measures is to control the solid wood and man-made board base material moisture content was between 8% ~ 12%, with water-based adhesive stickers, stickers veneer, joining together to paint dry for at least 24 hours after construction, the bottom water to dry for at least 12 hours after painting construction.

4, primer packing too much, one-time coating too thick. Excess primer packing of film-forming material defect, packing can't completely be film-forming material package and precipitation, lead to paint white; Too thick one-time construction speed of the inconsistent and solvent evaporation coating inside and outside layer result in uneven coating film, coating was white transparency is poor. Prevention method is to choose the packing medium primer, follow the principle of construction of the thin brush again.

5, resin containing low melting point elements, under low temperature to finalize the design microcrystalline or tiny sacs exhalation. In all white phenomenon, caused by the reason of this item of paint film white incubation period is the longest, largest losses, the repair one of the most complex and prevent the hardest.

Therefore, coating production enterprises in the control of raw materials, formula and control, product should be included in the control factors in the factory inspection; Furniture production enterprises, adornment is decorated in coating product selection and purchase acceptance factors should be taken into account.

Copyright: Zhang Jia Gang YaRui Chemical co.,Ltd 

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