Coating type in the crosslinking agent

Coating type in the crosslinking agent,For the common use of crosslinking agent, and can be divided into the addition polymerization and catalysis. The so-called addition polymerization type or open ring of epoxy group addition polymerization, crosslinking agent to attend to the 3 d mesh structure itself. The amount of the crosslinking agent, such as too little, the crosslinking product connection at the end of the reaction of epoxy group.

Therefore, for this kind of crosslinking agent, there is a suitable dosage. While type catalytic crosslinker by cation, or anion way make epoxy open-loop addition polymerization, in the end, the crosslinking agent does not attend to the mesh structure, so there is no such as the appropriate dosage of equivalent reaction; However, increase the dosage makes crosslinking speed.

In show in the type of crosslinking agent, dicyandiamide, adipic acid hydrazide such varieties, insoluble in epoxy resin at room temperature, and dissolved at high temperature after crosslinking reaction, thus presents a latent state. So, could be called latent type functional crosslinking agent.

Epoxy crosslinking agent is react with epoxy resin, a stereoscopic network polymer composite aggregate envelope in the mesh. Make linear resin grit size of the solid additives. Include a variety of types.

Epoxy resin is referring to molecule contains two or more than two epoxide group of organic compounds, in addition to the individual, their relative molecular quality is not high. The molecular structure of the epoxy resin based on molecular chain containing lively epoxy groups for its characteristics, epoxy groups can be placed at the end of the chain, or into a ring structure in the middle.

Due to contain active epoxy group in the molecular structure, make them with multiple types of crosslinking agent and crosslinking reaction to form insoluble with three to the network structure of polymer.




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


Every containing epoxy groups in the molecular structure of polymer compounds are collectively referred to as epoxy resin. After cross-linked epoxy resin has good physical and chemical properties, on the surface of the metal and nonmetal material has excellent bonding strength, good dielectric properties, deformation small shrinkage rate, dimension stability, high hardness, good flexibility, the alkali solvent and most stable, and therefore is widely used in casting, impregnation, laminated materials, adhesives, coatings and other purposes.

Epoxy resin with epoxy groups and hydroxyl zhong, para hydroxy can react with isocyanate. Epoxy resin as polyols containing hydroxyl component directly join polyurethane adhesives, use this method only hydroxyl groups take part in the reaction, epoxy group failed to respond.

With acid resin, carboxyl, epoxy ring opening, then react with the isocyanate polyurethane adhesives. Epoxy resin can be dissolved in ethyl acetate, adding phosphate heating reaction, the adduct of added to the polyurethane adhesives; Early sticky glue; Heat resistant and hydrolytic stability can improve reaction can also be used alcohol amine or amine to produce the polyol, uncle of nitrogen atoms in the adduct exist, can accelerate the NCO reaction.

Using epoxy resin as many hydroxyl component combines the advantages of polyurethane and the epoxy resin has good bonding strength and chemical resistance, make use of commonly used epoxy resin polyurethane adhesives, EP EP - 12-13, EP - 16 and EP - 20 varieties.

Epoxy resin as anti-corrosion material not only has a solid, good water resistance and leakage resistance, high strength, etc. At the same time, has the strong adhesion, normal temperature operation, convenient construction, good manufacturability, and the price is moderate. Using this kind of material of anti-corrosion engineering generally includes: FuChen resin adhesive material of FRP surface as a whole and isolation layer, paving block surface resin cement and mortar, resin cement seam jointing and filling piece of surface layer, resin thin cement or mortar made the whole surface of the single and compound and the isolation layer, glass flake resin surface and so on.

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