News Details
The powder coating is used for crosslinking agent of mimidazi
2017-9-4 12:14:28
The powder coating is used for crosslinking agent of mimidazi
Imidazole, 2 - methyl imidazole, 2-2 - phenyl imidazoline, isopropyl imidazole, 2 - propyl imidazole and minority groups containing long chain to replace such as 11 alkyl group or alkyl 17, it mainly as a reaction promoter or catalyst and application.
Commonly used imidazoles crosslinking agent is a kind of highly active crosslinking agent, a short period of time under medium temperature can make epoxy crosslinking, therefore its single component system with epoxy resin composition storage period is shorter, shall be on the chemical modification, the introduction of large substituent in its molecular form has the space steric hindrance imidazoles derivatives, or with transition metal Cu, Ni, Co, zinc and other inorganic salt reaction to generate the corresponding imidazole salt complex, to become a certain storage period at room temperature latent sexual coupling agent.
It is obvious that the common use of mimidazi crosslinking agent is helpful for the mixing uniformity of auxiliaries. Promoter choice depends on the nature of the crosslinking crosslinking system, dicyandiamide cross-linked epoxy system with imidazole, imidazoline, ring amidine, BF3 complex catalytic, epoxy/polyester mixed system and polyester/TGIC system is using imidazole season, imidazoline, quaternary ammonium and phosphorus, amidine compounds, polyurethane (PU) system using the organotin compounds, such as two lauric acid tin tin, bitterness and dibutyl tin oxide, etc.
There are not many researches on the crosslinking agents commonly used in China. Various imidazole with toluene diisocyanate (TDI), isophorone diisocyanate (IPDI), six methyl diisocyanate (HDI) reaction product made from closed, weakened the imidazole ring on the activity of amino and have a long life, when the temperature rises to above 100 ℃ sealing up lifted and imidazole active cross-linked epoxy resin recovery.
Selects the degassing agent such as benzoin and wax powder, the purpose is to reduce or eliminate the bubbles, can quickly at low temperature crosslinking process air bubbles emerge from the coating, to prevent the occurrence of such as pinhole coating apparent defects, reasonable degassing agent selection is very important, low melting point and low viscosity degassing agents more conducive to bubbles emerge from the coating.
Conventional matting agent in low temperature crosslinking powder coating formula doesn't work or extinction effect is not obvious, poor stability and extinction effect, flatting agent can reasonable selection or in low temperature area of auxiliary light still need to further the development of the research.
Low temperature crosslinking powder coating additives in formula design, because the production process conditions are harsh, such as cold extrusion, high speed shearing, etc., the choice of additives to adaptive production process such as squeeze gel formula failures in low temperature.
Chinese name: Diethyl toluene diamine(DETDA)
Diethyltoluenediamine Uses:
Imidazole, 2 - methyl imidazole, 2-2 - phenyl imidazoline, isopropyl imidazole, 2 - propyl imidazole and minority groups containing long chain to replace such as 11 alkyl group or alkyl 17, it mainly as a reaction promoter or catalyst and application.
Commonly used imidazoles crosslinking agent is a kind of highly active crosslinking agent, a short period of time under medium temperature can make epoxy crosslinking, therefore its single component system with epoxy resin composition storage period is shorter, shall be on the chemical modification, the introduction of large substituent in its molecular form has the space steric hindrance imidazoles derivatives, or with transition metal Cu, Ni, Co, zinc and other inorganic salt reaction to generate the corresponding imidazole salt complex, to become a certain storage period at room temperature latent sexual coupling agent.
It is obvious that the common use of mimidazi crosslinking agent is helpful for the mixing uniformity of auxiliaries. Promoter choice depends on the nature of the crosslinking crosslinking system, dicyandiamide cross-linked epoxy system with imidazole, imidazoline, ring amidine, BF3 complex catalytic, epoxy/polyester mixed system and polyester/TGIC system is using imidazole season, imidazoline, quaternary ammonium and phosphorus, amidine compounds, polyurethane (PU) system using the organotin compounds, such as two lauric acid tin tin, bitterness and dibutyl tin oxide, etc.
There are not many researches on the crosslinking agents commonly used in China. Various imidazole with toluene diisocyanate (TDI), isophorone diisocyanate (IPDI), six methyl diisocyanate (HDI) reaction product made from closed, weakened the imidazole ring on the activity of amino and have a long life, when the temperature rises to above 100 ℃ sealing up lifted and imidazole active cross-linked epoxy resin recovery.
Selects the degassing agent such as benzoin and wax powder, the purpose is to reduce or eliminate the bubbles, can quickly at low temperature crosslinking process air bubbles emerge from the coating, to prevent the occurrence of such as pinhole coating apparent defects, reasonable degassing agent selection is very important, low melting point and low viscosity degassing agents more conducive to bubbles emerge from the coating.
Conventional matting agent in low temperature crosslinking powder coating formula doesn't work or extinction effect is not obvious, poor stability and extinction effect, flatting agent can reasonable selection or in low temperature area of auxiliary light still need to further the development of the research.
Low temperature crosslinking powder coating additives in formula design, because the production process conditions are harsh, such as cold extrusion, high speed shearing, etc., the choice of additives to adaptive production process such as squeeze gel formula failures in low temperature.
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.
Solid coating coating is "powder coated". It does not use solvent, but the coating material fine powder is covered in the workpiece, the temperature that exceeds the powder melting point melts, form the paint film on the workpiece.
Powder coating includes three kinds of "electrostatic spraying", "fluidized bed" and "static current state bed". In the case of powder collection and recycling, the utilization rate of powder coatings is almost 100%. "Electrostatic spraying" used electrostatic adsorption to adsorb the powder coating on the normal temperature workpiece, and then warm and melt into the paint film.
"Fluidized bed" is a coating powder which will be preheated to the melting point of the coating, and the coating powder is fused and coated with the workpiece to form the paint film.
"Static current state bed" is to set the electrode to the powder chamber, so that the fluidized bed coating powder negative charge adsorbs on the earthed workpiece. There is no problem of solvent pollution, mainly coating powder recycling. The company has specialized in the production of powder coating equipment, its products are equipped with a complete powder recovery system, and also equipped with the anti-explosion system.
Along with the people environmental protection consciousness enhancement, environmental protection coating will get more and more widely used, according to different coating shall take the appropriate construction technology, in ensuring that coating protection and adornment effect, at the same time reduce the construction cost, people believe in the future market not only to the coating quality put forward higher request, to the coating construction technology will also propose corresponding environmental requirements.
U v paint light crosslinking technology adopted by the pollution-free during spray paint, more environmentally friendly than Pu paint, said on the technology of processing from the factory floor, the protection of workers' health and the environment is good, from the production point of view, it is a kind of upgrade products. However, for buyers, the product has set up a file in the processing of the floor, the paint of solvent evaporation, whether U v was produced by light crosslinking technology paint floor, still use the traditional craft production of Pu lacquer floor, will not constitute a pollution hazard to the user.
Copyright: Zhang Jia Gang YaRui Chemical co.,Ltd
Solid coating coating is "powder coated". It does not use solvent, but the coating material fine powder is covered in the workpiece, the temperature that exceeds the powder melting point melts, form the paint film on the workpiece.
Powder coating includes three kinds of "electrostatic spraying", "fluidized bed" and "static current state bed". In the case of powder collection and recycling, the utilization rate of powder coatings is almost 100%. "Electrostatic spraying" used electrostatic adsorption to adsorb the powder coating on the normal temperature workpiece, and then warm and melt into the paint film.
"Fluidized bed" is a coating powder which will be preheated to the melting point of the coating, and the coating powder is fused and coated with the workpiece to form the paint film.
"Static current state bed" is to set the electrode to the powder chamber, so that the fluidized bed coating powder negative charge adsorbs on the earthed workpiece. There is no problem of solvent pollution, mainly coating powder recycling. The company has specialized in the production of powder coating equipment, its products are equipped with a complete powder recovery system, and also equipped with the anti-explosion system.
Along with the people environmental protection consciousness enhancement, environmental protection coating will get more and more widely used, according to different coating shall take the appropriate construction technology, in ensuring that coating protection and adornment effect, at the same time reduce the construction cost, people believe in the future market not only to the coating quality put forward higher request, to the coating construction technology will also propose corresponding environmental requirements.
U v paint light crosslinking technology adopted by the pollution-free during spray paint, more environmentally friendly than Pu paint, said on the technology of processing from the factory floor, the protection of workers' health and the environment is good, from the production point of view, it is a kind of upgrade products. However, for buyers, the product has set up a file in the processing of the floor, the paint of solvent evaporation, whether U v was produced by light crosslinking technology paint floor, still use the traditional craft production of Pu lacquer floor, will not constitute a pollution hazard to the user.
Copyright: Zhang Jia Gang YaRui Chemical co.,Ltd
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