Epoxy resin adhesive with paint crosslinking agent

Epoxy resin adhesive with paint crosslinking agent

Epoxy resin production system and its application technology industry in China, due to the emergence of new varieties, new technology, new ideas, and are constantly adapt to the environment, such as high and new technology and application of materials widely demands and present a rapid development momentum.

2006 epoxy resin in our country the total demand, according to incomplete statistics has amounted to 800000 t, and the epoxy resin adhesive as fine chemical products, the annual growth rate has remained at more than 12% in recent years, has been above 50000 t, 2005 amounted to more than 800 kinds of varieties and new analysing continues to increase, the content of science and technology and the improvement of technical level is greatly extend its application range.

Because many for two-component epoxy adhesive, not only need to packaging storage and transportation, a lot of operation and environmental protection, and measurement error when making up and mix uneven, easy cause product bonding strength and other important properties of the wave. The adhesion of the chemical reaction has been increased, and the application period is limited, and it is not suitable for automatic adhesion new process, it is also liable to be discarded.

Thus is a simple process, easy to implement, little environmental pollution, and is advantageous to the product quality improvement, is suitable for the new process of one-component epoxy resin adhesive research and development has always been to be the concern of the people.

Current research is focused on the design of the epoxy resin adhesive with crosslinking agent molecules and selection, the establishment of corresponding technological conditions and, on the improvement of the comprehensive performance of latent sexual intercourse agent research and development are the most active and important.

This kind of epoxy adhesive used crosslinking agent is mainly carried out by the active group and structure of crosslinking agent with high storage stability by temporarily closed or passivation. Many common two-component epoxy resin adhesive of low temperature, medium temperature and high temperature cross-linking agent, through physical and chemical means adjustment and control of reaction activity to develop, and there have been many reports. This kind of crosslinking agent after joining into the epoxy resin has good storage stability at room temperature, pressure, when used with the aid of moisture, along with the physical and chemical factors such as light, heat or pressure make the relative stability of epoxy resin adhesive with crosslinking agent according to the different mechanisms to live and with epoxy cross-linking refs.



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).


It is of great significance to carefully analyze these research initiatives and technical approaches, and it is very enlightening. This is of great significance to the molecular design and research and development of new single-component epoxy resin with latent sexual coupler.

Imidazoles crosslinking agent is commonly used in epoxy resin crosslinking agent, has a highly active, but the storage period is shorter, 120 ℃ can make fast crosslinked epoxy resin, the product has good resistance to hot and humid. The use of the agent as a latent sex agent must be chemically modified.

Modification approach focused on at present: one is to use the introduction of relatively large organic groups such as triazine ring base, long chain alkyl benzyl, cyanoethylated side group, such as for imidazole molecule secondary amine and tertiary amine base on part of the active hydrogen atoms produced large enough steric effect, thus reduce reactivity, improve the latent.

At about 150 ℃, 22 methyl imidazole applicable period for 25 h, but 12 222 242 methyl ethyl cyano imidazole applicable period for 6 d, long chain alkanes 17, 22 imidazole applicable period of 40 d. Secondly, the corresponding derivatives were modified by using the active hydrogen in the midazole molecule and the isocyanate, cyanate and lactone, which are easy to react with.

If use modified with cyanate ester, applicable period from weeks to months, can be in 120 ℃ crosslinking, combined material learning performance is also improved. Then one method is through the use of imidazole on tertiary amine molecules central lone pair electrons on the nitrogen atom of alkaline, with empty orbital transition metal inorganic salt, organic acid, anhydride and boric acid passivation the active compound and some compounds.

Such as acrylic modified after the storage period extend the 7 d, and transition metal inorganic salt modified imidazole ligand complex can crosslink rapidly in 150 ~ 170 ℃, and with good storage stability at room temperature.

It should be noted that most of these modified crosslinking agents have different degrees of influence on the hydrolysis and heat resistance of crosslinked products.

Copyright: Zhang Jia Gang YaRui Chemical co.,Ltd 

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