Imidazoles coating crosslinking agent

Imidazoles coating crosslinking agent,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.

Imidazoles crosslinking agent is a kind of highly active crosslinking agent, the temperature in a short time 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, Cu, Ni, Co or and transition metals, 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.

Obviously this do for fertilizer mixing uniformity is helpful. 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.

The domestic study of sexual intercourse imidazoles latent agent is less, foreign markets are relatively more. Japan's first industrial pharmaceutical co., LTD will be a variety of imidazole with toluene diisocyanate (TDI), isophorone diisocyanate (IPDI), six methyl diisocyanate (HDI) made closed reaction product, weakened the imidazole ring on the activity of the amino, 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)

Physical and chemical properties: light yellow transparent liquid, slightly soluble in water, soluble in alcohols, ethers, ketones and other polar organic solvents, and polyether, polyester polyol compatibility.

Density 1.022

Viscosity (20 ℃) ??mPa·ss290±10

Pour Point ℃-9

Boiling point of310°C

Flash Point°C161.1°C


Solid paint coating namely "powder coating". It without solvent, but the coating material, fine powder on the parts with more than the temperature of the powder melting point to melt, the paint film is formed on the artifact.

Powder coating including "electrostatic spraying" "flow bed" and "static current state bed" three kinds of craft. Under the condition of the powder to collect and recycle, powder coating the utilization rate of almost 100%. The electrostatic spraying powder coating by electrostatic adsorption state adsorption interesting artifacts, then heating the molten film formation.

"Flow bed" is to have been preheated to paint temperature above the melting point of workpiece in fluidization suspended powder coating, the coating of contact with the workpiece powder molten coating film formed on the workpiece.

"Static current state bed" is set the electrode in the powder room, make the flow bed coating powder negatively charged adsorption on the grounding of the workpiece. Powder coating no solvent pollution problems, mainly is the coating powder recycling problem. Has been specializing in the production of complete sets of powder coating equipment of the enterprise, its product is equipped with a complete powder recovery system, also equipped with explosion prevention 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.

Copyright: Zhang Jia Gang YaRui Chemical co.,Ltd 

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