Epoxy powder coating with crosslinking agent

Epoxy powder coating with crosslinking agent, crosslinking agent, as one of the coating film material, coating industry at home and abroad has been a research hot spot.

Epoxy powder coatings in recent years were introduced in detail with the research situation of crosslinking agent from dicyandiamide and modified dicyandiamide, dicarboxylic acid hydrazide, isocyanate, imidazoles derivatives and imidazoline, diverse carboxylic acid ring amidine diverse carboxylic acid (anhydride) and ammonium salt, acid anhydride adduct, phenolic crosslinking agent, phenolic resin, polyester resin and acrylic resin and the reaction mechanism of epoxy resin made in detail, such as epoxy powder coating and points out the development trend of the crosslinking agent is used to study.

Relative to the solvent coating, powder coating, with its low volatile organic compounds (VOC) emissions, are regarded as environmentally friendly coatings. As world restrictions on VOC regulations (such as the United States, the Clean Air Act the Environmental Protection Act, Germany TA Luft, etc.) of the introduced gradually, and people's emphasis on Environmental Protection, promote the rapid development of powder coatings.

At the same time, the powder coating for high Efficiency (Efficiency), good coating performance Excellence nessuah brokerage, ecological environmental protection, Ecology and Economy (pa) type 4 e paint variety, various types of paint in the varieties have a place, such as heavy anti-corrosion type, electric insulation, decoration, weather resistant coatings, and other fields.

In powder coating, pure epoxy powder coating system has a long history research. With the continuous development of powder coatings, pure epoxy powder coating system has maintained steady momentum of development.

Epoxy resin refers to contain two or more than two epoxy group of aliphatic, alicyclic or aromatic chain of polymer prepolymer, is a kind of important thermosetting resins, widely used in different fields, such as anticorrosive coatings, adhesives, electronic packaging materials, insulation materials, high performance composite materials. Epoxy resin because of its molecular structure containing lively, hydroxyl of the epoxy groups and a certain proportion and therefore is widely applied in thermosetting powder coatings.

Lively epoxy group in the epoxy resin can react and containing active hydrogen compounds, such as amine, phenol, carboxylic acid and alcohol hydroxyl, etc; When crosslinking hydroxyl of the epoxy resin are also involved in many chemical reactions, such as with acid anhydride, carboxylic acid, hydroxyl methyl, alkoxy, isocyanate and other reactions.




Chinese name: Diethyl toluene diamine(DETDA)

Diethyltoluenediamine Uses:

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.


Epoxy powder coating is crosslinking reaction process of epoxy resin and epoxy between hydroxyl groups and the corresponding functional groups under the condition of heat or radiation crosslinking reaction each other and form insoluble, with three dimensional network structure of the polymer melt.

Crosslinking properties of epoxy powder coating is influenced by many factors, including the structure of the crosslinking agent, crosslinking conditions, and the molecular weight of epoxy resin, etc., including the structure of the crosslinking agent is one of the most important influencing factors.

Crosslinking agent is an important component of the powder coating, directly affects the production, storage and application of powder coatings, such as extrusion temperature, the temperature of crosslinking and crosslinking time, storage stability, flow property, impact resistance, hardness, weatherability, chemical resistance and so on. With the continuous development of powder coatings, powder coatings variety are also growing.

Each working on a new crosslinking agent is equivalent to develop a new kind of epoxy resin or epoxy resin has been expanded new application scope. To develop a new kind of resin is far better than to develop a new kind of crosslinking agent to spend more time and energy, so people often through the development of new crosslinking agent to extending the varieties of powder coatings.

Visible, crosslinking agent research directly influence the development of powder coatings.

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