Water-based epoxy top coatings crosslinking agent

Water-based epoxy top coatings crosslinking agent,With the synchronous development of waterborne epoxy technology.

For Ⅰ type waterborne epoxy system, the crosslinking agent requirements which had the function of the crosslinking agent, emulsifier. Earlier research on this subject, technology is also more mature. The first successful Ⅰ type water-borne epoxy crosslinking agent is Casmide360 Casmide362 and their modified products. With this kind of crosslinking agent is mainly through some into aliphatic amine salt modified crosslinking agent.

As Becker, epoxy resin with low relative molecular mass and the reaction with more ethylene amine to produce the end amino epoxy - amine adduct, with a single epoxy compounds the end, with acetic acid and part of the secondary amine to adjust the HLB value of crosslinking agent and reduce the reactivity of crosslinking agent, suitable for longer periods.

And tongji university, such as Chen collars will be low relative molecular mass of liquid epoxy resin (E51) and polyethylene glycol reacts end epoxy compound, and then react with triethylene tetramine amino epoxy - amine adduct generated end, with a single epoxy compounds, with acetic acid and salt, and finally made Ⅰ type water-borne epoxy crosslinking agent, due to the introduction of the long chain of polyethylene glycol (peg) reduces the crosslinking density increased the flexibility of the coating.

There are also some use between benzene dimethylamine modified products. As Becker, using epoxy resin and epoxy compound polyethylene glycol reacts end, reaction with dimethylamine between benzene again, then through sealed end into salt modified crosslinking agent products. Because this kind of crosslinking agent all needs to rely on salt to reduce the reaction activity and increase the water solubility and stability, but the excess acetic acid on corrosion of steel have certain effect, therefore is not suitable for steel components.




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).


Late to solve the problem of Ⅰ type water-borne epoxy coating corrosion resistance, and developing some new crosslinking agent technology, this kind of crosslinking agent is no more salt. Such as benzene dimethylamine with excess with epoxy resin (MXDA) reaction end amino epoxy amine adduct to end carboxyl polyether glycol reacts amide, amine, and then the sealing and get Ⅰ type water-borne epoxy crosslinking agent.

Three new water-based epoxy crosslinking agent products: (1) 701 zhongguo kuangye daxue Epilink @ % solid high relative molecular mass of amine fat emulsion, this product can be emulsified liquid epoxy resin and the relative molecular mass of the crosslinking agent can make the coating is fast dry. Because of its fast will emulsion crosslinking agent of dry and liquid epoxy resin is a combination of good film-forming performance is very good, can be achieved in obtaining good water resistance and wet adhesion and possesses the advantages of fast drying and zero VOC.

Can be used for metal protection primer and self-leveling floor coatings; (2) Anquamine670, is a modified aliphatic amine solution, the solid content of 65%. This crosslinking agent emulsification liquid epoxy resin easily and form a uniform film, good adhesion on broad spectrum base material. This kind of crosslinking agent without using organic acid salt, thus enhanced the water resistance and corrosion resistance.

Short drying time of traditional water crosslinking agent; (3) Aquamine456, based on a hydrophobic PCPA alicyclic amine modified products. The modification methods is to nonionic soluble polymer WSP (usually a polyoxyethylene amine) to the PCPA, in order to realize the stable dispersion in water.

Modified by two step reaction, the first step: water-soluble polymer WSP and a coupling agent, leaving a functional group to further reaction; Step 2: use excessive PCPA reaction, on the technology can be realized by adopting different coupling agent to, but the yield is very low, only a small part of the PCPA (10%) received a nonionic surfactant and the rest did not react on PCPA when mixed with epoxy resin, along with emulsion.

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