News Details
The coating USES imidazole/epoxy as the crosslinking agent
2017-5-4 11:52:11
The coating USES imidazole/epoxy as the crosslinking agent.The most representative product of imidazole/epoxy is epi-cure P101. It is A product of A 2-methylimidazole and Epon828 liquid bisphenol A epoxy resin. It was first invented in 1973 to solve the dialysis problem caused by the use of imidazole.
The product is important in the field of low temperature crosslinking epoxy powder. It can be used as a cryogenic crosslinking agent and can be used in combination with other crosslinking agents. The optimal low temperature crosslinking performance can be provided by using 121/30min when used alone. If with other non catalytic amine crosslinking agent used in combination, can not only reduce the crosslinking temperature and increase the speed of crosslinking, and can improve the smoothness of coating, such as resistance to yellowing application effect. And phenols crosslinking agent and it can get a quick crosslinking (220 ℃ / 30 s) steel and pipeline anticorrosion functional powder.
The cryogenic crosslinking epoxy powder, which is made from imidazole/epoxy, also has the problem of storage stability, which normally requires low temperature storage and transportation. According to the report, it is reported that polyisocyanate is coated evenly in the imidazole/epoxy addition, which can improve the storage stability of the crosslinking agent without compromising its crosslinking performance.
Imidazole is used as a crosslinking agent for epoxy adhesive and is not used alone. The reference dosage is 4 ~ 8. Crosslinking conditions or 150 ℃ 70 ℃ / 8 h / 4 h. Crosslinked heat deformation temperature of 117 ~ 166 ℃. Imidazole react with copper sulfate to form a first wife complex, more stable at room temperature, in 90 ~ 110 ℃ when the decomposition reaction with epoxy group. At the same time, the metal ions can be polymerized with the epoxy group, and into the crosslink to form a chelate. A cold hour. With good storage stability, medium temperature can be quickly crosslinked. This kind of imidazole metal salt is used as the crosslinking agent promoter, dicyandiamide can lower the crosslinking temperature to 120 ℃.
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
Epoxy is a resin compound that contains at least two reactive epoxy groups. Epoxy resin by crosslinking have many prominent excellent performance, such as for a variety of materials, especially for the adhesion of the metal is very strong, has a strong resistance to chemical corrosion resistance, high mechanical strength, good electrical insulation, corrosion resistance, etc.
Epoxy resins can be cross-linked in a wide range of temperature, and the volume of the cross-linked volume shrinks. Bisphenol A epoxy resin is A polymer compound which is condensed by bisphenol A and epoxy chloropropane under alkaline conditions and is purified by water and purified solvent. Manufactured goods for epoxy resin has good physical and mechanical properties, chemical resistance, electrical insulation properties, is widely used in coating, adhesive, glass fiber reinforced plastic, laminate, electronic casting and potting and coating etc.
In powder coating melt flow horizontally spreading stage, the whole system into molten powder coating at this time to join the flow ping agent has migrated to the molten coating to the surface of the powder internally so it between resin and filler pigment wetting effect is not obvious, so you need to join another high softening point, not easy to quickly migrate to the surface of acrylate polymers to reduce molten coating inside and substrate, the surface tension between fillers, thus promotes molten system spreading of substrate and infiltration of fillers. This booster is a brightener (also known as a brightener, a wet accelerator).
As temperatures rise, in the process, powder coating viscosity sharply reduced, the flow and infiltrating force than is produced by the viscosity of block, so the process is infiltrating and flow flat major phases. Because of the whitening agent and flow ping agent work together, to reduce the surface tension of the molten coating inside, so the resin to infiltrate fillers, and accelerates the moisture of the molten fluid within volatile substances such as overflow from the surface (join benzoin overflow) can accelerate the bubble burst, overflow the bubble will be under the influence of surface tension, into a smooth surface.
Copyright: Zhang Jia Gang YaRui Chemical co.,Ltd
Diethyl toluene diamine(DETDA) http://www.yaruichem.com
The product is important in the field of low temperature crosslinking epoxy powder. It can be used as a cryogenic crosslinking agent and can be used in combination with other crosslinking agents. The optimal low temperature crosslinking performance can be provided by using 121/30min when used alone. If with other non catalytic amine crosslinking agent used in combination, can not only reduce the crosslinking temperature and increase the speed of crosslinking, and can improve the smoothness of coating, such as resistance to yellowing application effect. And phenols crosslinking agent and it can get a quick crosslinking (220 ℃ / 30 s) steel and pipeline anticorrosion functional powder.
The cryogenic crosslinking epoxy powder, which is made from imidazole/epoxy, also has the problem of storage stability, which normally requires low temperature storage and transportation. According to the report, it is reported that polyisocyanate is coated evenly in the imidazole/epoxy addition, which can improve the storage stability of the crosslinking agent without compromising its crosslinking performance.
Imidazole is used as a crosslinking agent for epoxy adhesive and is not used alone. The reference dosage is 4 ~ 8. Crosslinking conditions or 150 ℃ 70 ℃ / 8 h / 4 h. Crosslinked heat deformation temperature of 117 ~ 166 ℃. Imidazole react with copper sulfate to form a first wife complex, more stable at room temperature, in 90 ~ 110 ℃ when the decomposition reaction with epoxy group. At the same time, the metal ions can be polymerized with the epoxy group, and into the crosslink to form a chelate. A cold hour. With good storage stability, medium temperature can be quickly crosslinked. This kind of imidazole metal salt is used as the crosslinking agent promoter, dicyandiamide can lower the crosslinking temperature to 120 ℃.
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
Epoxy is a resin compound that contains at least two reactive epoxy groups. Epoxy resin by crosslinking have many prominent excellent performance, such as for a variety of materials, especially for the adhesion of the metal is very strong, has a strong resistance to chemical corrosion resistance, high mechanical strength, good electrical insulation, corrosion resistance, etc.
Epoxy resins can be cross-linked in a wide range of temperature, and the volume of the cross-linked volume shrinks. Bisphenol A epoxy resin is A polymer compound which is condensed by bisphenol A and epoxy chloropropane under alkaline conditions and is purified by water and purified solvent. Manufactured goods for epoxy resin has good physical and mechanical properties, chemical resistance, electrical insulation properties, is widely used in coating, adhesive, glass fiber reinforced plastic, laminate, electronic casting and potting and coating etc.
In powder coating melt flow horizontally spreading stage, the whole system into molten powder coating at this time to join the flow ping agent has migrated to the molten coating to the surface of the powder internally so it between resin and filler pigment wetting effect is not obvious, so you need to join another high softening point, not easy to quickly migrate to the surface of acrylate polymers to reduce molten coating inside and substrate, the surface tension between fillers, thus promotes molten system spreading of substrate and infiltration of fillers. This booster is a brightener (also known as a brightener, a wet accelerator).
As temperatures rise, in the process, powder coating viscosity sharply reduced, the flow and infiltrating force than is produced by the viscosity of block, so the process is infiltrating and flow flat major phases. Because of the whitening agent and flow ping agent work together, to reduce the surface tension of the molten coating inside, so the resin to infiltrate fillers, and accelerates the moisture of the molten fluid within volatile substances such as overflow from the surface (join benzoin overflow) can accelerate the bubble burst, overflow the bubble will be under the influence of surface tension, into a smooth surface.
Copyright: Zhang Jia Gang YaRui Chemical co.,Ltd
Diethyl toluene diamine(DETDA) http://www.yaruichem.com
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