The coating is made of cryogenic amine crosslinking agent

The coating is made of cryogenic amine crosslinking agent.The traditional main product of the amines crosslinking agent is polyamide (or polyamide). Modified amine addition. In addition to the requirements of drying time and crosslinking rate, the anti-white and waterproof spots are also considered. Beramine reacts with carbon dioxide and water in the air to form carbamate, which penetrates to the surface of the coating and is white.

Surface white (sometimes called the fog or sweating) can damage the coating performance, because it can trigger a dangerous drop in luster, yellow degeneration increased, painting becomes poor and poor adhesion between the layers. The possibility of low temperature and wet conditions increases.

In order to minimize the formation of carbamate and improve the early anti-waterspots, the makers of crosslinking agents have developed various modified amine compounds. The addition of these compounds can reduce or eliminate the production of white, because the hydrogen in beramine is preloaded by the epoxy. Amine addition is made by the excess of beramine reacting to epoxy resins.

It is used by amines and wet air to form amino-forma and epoxy resin to be used to make amine addition. Some of the most commonly used include: aliphatic amine and alicyclic amine diethyl triamine (DETA), four triethyl amine (TETA), tetraethylenepentamine (TEPA), isophorone diamine (IPDA), double - to - amino cyclohexyl methane (PACM) and 1, 2 - amino cyclohexane (1, 2 - DACH).

At 4.5 ℃ and RH80 %, each of the crosslinking agent has its own advantages and disadvantages, according to the different application needs to choose a kind of crosslinking agent. For varnish, and transparency of paint film was eventually pale resistance performance is very important, but for paint, other properties such as the hardness of membrane and to not sticky on the performance of time may be more important.

To illustrate this, a graphical technique called "cloud atlas" or "radar map" is a valid expansion package today. The axis of this diagram is determined in this way, which is the long ray segment of the more good one; In this way, the overall performance of the paint base is the largest of the "performance ray segments". 4.5 ℃ under the performance of these crosslinking agent by summary in figure 3.

The DSC technique used in this study is a powerful tool for evaluating the degree of reaction of low temperature crosslinking coatings. Under 4.5 ℃ with the study of each crosslinker crosslinked liquid epoxy resin were better crosslinking performance (strong) reactivity. To illustrate the fact, contrast the hypothermic reaction activity of these crosslinking agents with polyamide. With similar DSC technique under 4.5 ℃ for three kinds of polyamide crosslinking agent (gal promoter and without accelerator) crosslinking rate were determined.




Chinese name: Diethyl toluene diamine(DETDA)

Diethyltoluenediamine packing： net weight 200KG/ galvanized iron drum (a small cabinet pallet loaded 16 tons), 1000KG/IB barrels (a small cabinet loaded 18 tons or 23 tons of ISOTANK).


Results show that the reaction of polyamide degree for 33-43% in the third days, even degree of crosslinking reaction to 14 days only 55-65%, and compared with low temperature crosslinking agent (see figure 2), the reaction degree in three days is 65-75%, 14 days is 75-95%.

This study will be crosslinking agent 2 compared with the other crosslinking agent, under 4.5 ℃, it in the first four days of crosslinking rate is lowest, but after 14 days, it finally reached the highest rate of reaction.

The reactivity of these new crosslinking agent than polyamide is strong, at the start of a crosslinking stage reflects the most obvious, and this stage is crucial to the growth of the coating performance. For this reason, we expect greater improvement in anti-water spots and early resistance to chemical resistance.

The cross-linking agent used in this institute has excellent low temperature reactivity, and other performance tests indicate that each crosslinking agent has its most appropriate specific USES. The crosslinking agent 1 is suitable for wastewater treatment and solvent-free Marine coatings because it has excellent water resistance and corrosion resistance.

The cross-linking agent 2 is suitable for the protection of industrial protective coatings, Marine coatings, and solvent-resistant tanks in the VOC range of 2.8 pounds/galen. The crosslinking agent 3 has high reactive activity and excellent resistance to chemical properties, which can be used as a cross-linking agent for the lining of the tank, the synthetic floor and the coating of polyamide.

Copyright: Zhang Jia Gang YaRui Chemical co.,Ltd 

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