Calculation of Crosslinking Agent for Epoxy Resin Coatings

The product is identical to Ethancure 100 and Lonza DETDA 80, DETDA is very effective polyurethane elastomer chain extender; also be used as polyurethane and epoxy resin curing agent, epoxy resin of an antioxidant, industrial oils and lubricants . In addition, also as intermediates in organic synthesis.Especially for the RIM (reaction injection molding), is important in the field of spray polyurea chain extender species. Also can be used for casting polyurethane elastomer (CPU) and a curing agent, epoxy curing agent, epoxy resin of antioxidants, lubricants and industrial oils other antioxidants. 


The actual dosage is calculated according to the theoretical dosage of 1.01 times.

Actual dosage range: (24.03-27.07) g, 25.0

Due to the different structure of the cross-linking agent, the impact on the performance of epoxy resin coating is different, in order to achieve a better performance, a variety of cross-linker can be used to meet the requirements of a variety of ways, such as the use of T31 cross- 2040 cross-linking agent can improve the coating application period, and can improve the initial hardness of the film.

From the experimental analysis can be seen, 2040 cross-linking agent is the overall performance of all the best cross-linking agent, which has a faster drying rate, while a longer period of applicability, can not produce in the summer construction burst And so on, and in the low temperature also has a faster drying rate, so a wide range of applications, but also has good resistance to chemical corrosion, is an ideal epoxy resin crosslinking agent.

Epoxy resin coating acid resistance is generally poor, so the design of acid-resistant paint, should be considered with other resins, such as polyethylene resin and other complex use.

The epoxy resin has a secondary hydroxyl group and an epoxy group, and the secondary hydroxyl group may be reacted with an isocyanate. Epoxy resin as a polyol directly into the polyurethane adhesive containing hydroxyl components, the use of this method only hydroxyl reaction, the epoxy group failed to react.

With an acidic resin, the carboxyl group makes the epoxy ring open and reacts with the isocyanate in the polyurethane adhesive. Epoxy resin can also be dissolved in ethyl acetate, add phosphoric acid heating reaction, the adduct added to the polyurethane adhesive; glue the initial adhesion; heat and hydrolysis stability can also be improved can also be used alcohol amine Or amine to form a polyol, the presence of a tertiary nitrogen atom in the adduct can accelerate the NCO reaction.

Epoxy resin used as a polyhydroxy component combines the advantages of polyurethane and epoxy resin, with good bonding strength and chemical resistance, the use of polyurethane adhesives used in the general use of epoxy resin EP-12, EP-13 , EP-16 and EP-20 and other varieties.

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