News Details
Crosslinking agent for thermosetting powder coating
2017-5-3 16:25:59
Crosslinking agent for thermosetting powder coating. Is the earliest development of thermoset powder coating epoxy powder coating, the coating adhesion, hardness, flexibility, excellent chemical resistance, excellent reactivity and storage stability, so the application is very extensive. This paper introduces the principle of cross-linking reaction of epoxy powder coating, and summarizes the progress of epoxy powder coating over 20 years.
Epoxy powder coating was developed by the 1960 s, thermosetting powder coatings for quite some time, epoxy powder coating as many varieties, the most widely application of thermosetting powder coatings.
But in the late 80 s, with the rapid development of epoxy - polyester powder coating, the powder coating decorative than epoxy powder coating and price has an advantage, the many USES of epoxy powder coating was gradually replaced by epoxy - polyester powder coating, epoxy powder coating from the top to the secondary position.
According to 2006 statistics, in the world production of thermosetting powder coating, epoxy powder coating was 6.5%, the yield in the epoxy - polyester and polyester powder coating after the third.
Epoxy powder coating is one of the earliest development of successful thermosetting powder coatings, which still account for a significant proportion of epoxy powder. Epoxy powder coating prepared by epoxy resin has the following main advantages:
(1) the coating has a certain appearance level. Because the melt viscosity of epoxy resin is low, the flow of the coating is better, and because there are no by-products produced by the crosslinking, it is easy to get the flat coating.
(2) the mechanical properties of the coating and the performance of the chemical resistance are good, and they also have good electrical insulation.
(3) by choosing the right epoxy crosslinking agent, the powder coating can be obtained by the constant temperature storage stability.
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.
(4) the melting of epoxy resin is low, so when the fusion is extruded, the resins are good and the paint is spread evenly. In addition, the melting temperature of materials is not much different from the softening point of the resin, so it is not easy to produce the "gelatinized" particles in the production process.
(5) the electrostatic effect is good. Epoxy resin has high volume resistance, making the powder particles is easy to be charged, electrostatic coating performance is good, coating on the workpiece is not easy to fall off, coating with high efficiency.
Epoxy powder coating consists of special resin, crosslinking agent, leveling agent, promoting agents, pigment, filler and other additives preparation, and its production method is different from the traditional solvent coating, powder coating production technology is only part of the physical process of miscibility, there exists a complex chemical reaction, and as far as possible control its not happen chemical reaction, to ensure that the product has a relative stability.
Its production process is divided into material mixing, melt dispersing, heat extrusion, cooling, crushing, crushing, grading and packaging process. Cross-linking reaction principle
The crosslinking agent of epoxy powder coating includes phenol, acid anhydride, dicyanide and its derivatives, acylhydrazine, etc. The type of crosslinking agent has a great influence on the performance of the solid film. The coating of thermosetting powder coating is a high polymer, their performance depends mainly on their structure, and also depends on their concentration.
2. Crosslinking agent and crosslinking agent of polymer state of aggregation plays a decisive role, but also for powder coating of storage period, such as film forming conditions play a crucial role.
Copyright: Zhang Jia Gang YaRui Chemical co.,Ltd
Diethyl toluene diamine(DETDA) http://www.yaruichem.com
Epoxy powder coating was developed by the 1960 s, thermosetting powder coatings for quite some time, epoxy powder coating as many varieties, the most widely application of thermosetting powder coatings.
But in the late 80 s, with the rapid development of epoxy - polyester powder coating, the powder coating decorative than epoxy powder coating and price has an advantage, the many USES of epoxy powder coating was gradually replaced by epoxy - polyester powder coating, epoxy powder coating from the top to the secondary position.
According to 2006 statistics, in the world production of thermosetting powder coating, epoxy powder coating was 6.5%, the yield in the epoxy - polyester and polyester powder coating after the third.
Epoxy powder coating is one of the earliest development of successful thermosetting powder coatings, which still account for a significant proportion of epoxy powder. Epoxy powder coating prepared by epoxy resin has the following main advantages:
(1) the coating has a certain appearance level. Because the melt viscosity of epoxy resin is low, the flow of the coating is better, and because there are no by-products produced by the crosslinking, it is easy to get the flat coating.
(2) the mechanical properties of the coating and the performance of the chemical resistance are good, and they also have good electrical insulation.
(3) by choosing the right epoxy crosslinking agent, the powder coating can be obtained by the constant temperature storage stability.
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.
(4) the melting of epoxy resin is low, so when the fusion is extruded, the resins are good and the paint is spread evenly. In addition, the melting temperature of materials is not much different from the softening point of the resin, so it is not easy to produce the "gelatinized" particles in the production process.
(5) the electrostatic effect is good. Epoxy resin has high volume resistance, making the powder particles is easy to be charged, electrostatic coating performance is good, coating on the workpiece is not easy to fall off, coating with high efficiency.
Epoxy powder coating consists of special resin, crosslinking agent, leveling agent, promoting agents, pigment, filler and other additives preparation, and its production method is different from the traditional solvent coating, powder coating production technology is only part of the physical process of miscibility, there exists a complex chemical reaction, and as far as possible control its not happen chemical reaction, to ensure that the product has a relative stability.
Its production process is divided into material mixing, melt dispersing, heat extrusion, cooling, crushing, crushing, grading and packaging process. Cross-linking reaction principle
The crosslinking agent of epoxy powder coating includes phenol, acid anhydride, dicyanide and its derivatives, acylhydrazine, etc. The type of crosslinking agent has a great influence on the performance of the solid film. The coating of thermosetting powder coating is a high polymer, their performance depends mainly on their structure, and also depends on their concentration.
2. Crosslinking agent and crosslinking agent of polymer state of aggregation plays a decisive role, but also for powder coating of storage period, such as film forming conditions play a crucial role.
Copyright: Zhang Jia Gang YaRui Chemical co.,Ltd
Diethyl toluene diamine(DETDA) http://www.yaruichem.com
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