News Details
Aromatic and aliphatic amine diverse coatings crosslinking agent
2017-4-17 21:17:29
Aromatic and aliphatic amine diverse coatings crosslinking agent,Aromatic amine and its derivatives give the system high reactivity and very good chemical resistance, but also has a very prominent yellowing tendency. Another weakness is due to their toxicity is very suspicious of physiological activity.
Meaning that they are hard to resist the environmental protection requirements of the system of crosslinking agent. Imidazole is with two nitrogen atoms of 5 yuan heterocyclic compound, one of the nitrogen atoms secondary amine, another nitrogen atoms tertiary amine.
Much of the activity of hydrogen in secondary amine, cause the epoxy group open loop. Imidazole molecule in 2, 4 locations on the carbon atoms of hydrogen can be replaced by different groups, and derived a large number of imidazole homologue. 2-2 - phenyl methyl imidazole and imidazoline is the most commonly used in powder coating crosslinked promoter.
Industrial 2-methyl imidazole ? ? melting point 140-140, the boiling point of 263 ? ? - 265, activation temperature ? ? 82-82 (according to ge dosage of 3% added to the 100-51 after 4 hours of epoxy resin can produce the crosslinking temperature), the appearance is light yellow to white, crystalline, often used as promote into crosslinked agent.
It can serve as dicyandiamide, two hydrazide, anhydride, phenolic resin and phenolics crosslinking agent promoter. General in the powder coating additives for the resin content of 0.1% to 0.6%, in the heavy-duty epoxy powder coating used for phenolic crosslinking agent promoter when the dosage of 0.6% to 0.6%.
The disadvantage is that: the coating color easy yellowing, effects of powder coatings in different degrees storage period. Imidazole adduct, sometimes referred to as the bonus imidazole, EPI - CUREP101 famous products. It is A 1:1 or 1.5 :1 equivalent ratio of 2 - methyl imidazole and Epon828 liquid bisphenol A epoxy resin reaction products.
Imidazole adduct can alone can also be combined with other non catalytic crosslinker use. Used alone can provide the best crosslinking performance at low temperature, other crosslinking agent combination can provide better application effect, so the crosslinking agent plays a more and more is the role of catalyst.
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.
And imidazole compounds, as to it simply as a promoter of powder coating is not appropriate, because it can reduce the storage stability of the powder coating and lead to serious agglomeration and eventually lose industrial applications.
Most of aliphatic and aromatic primary amine with secondary amine are solid at room temperature, but they cannot be used as a crosslinking agent in epoxy powder coating, because the system of high reactivity, in extrusion processing can cause many problems, also can significantly reduce the storage stability of coatings.
Has developed several kinds of amine derivatives in the powder coating composition combined with solid epoxy resin can provide the necessary stability.
Multiple amine is not belong to a polyol, but it in polyurethane synthesis with polyol up effect similar to that of strictly speaking the polymer obtained cannot be named pu, shall be referred to as poly (amino formamide or polyurea, however, as a people will usually polyurethane class discussion.
The most commonly used multivariate amine has 3, 3 'two chlorine - 4, 4' : diphenyl methane diamine (MOCA) and propylene glycol double - (4, 4 'two amino) benzoic acid ester.
Other oligomer polyols, such as hydroxyl silicone resin is often used in special circumstances.
Copyright: Zhang Jia Gang YaRui Chemical co.,Ltd
Diethyl toluene diamine(DETDA) http://www.yaruichem.com
Meaning that they are hard to resist the environmental protection requirements of the system of crosslinking agent. Imidazole is with two nitrogen atoms of 5 yuan heterocyclic compound, one of the nitrogen atoms secondary amine, another nitrogen atoms tertiary amine.
Much of the activity of hydrogen in secondary amine, cause the epoxy group open loop. Imidazole molecule in 2, 4 locations on the carbon atoms of hydrogen can be replaced by different groups, and derived a large number of imidazole homologue. 2-2 - phenyl methyl imidazole and imidazoline is the most commonly used in powder coating crosslinked promoter.
Industrial 2-methyl imidazole ? ? melting point 140-140, the boiling point of 263 ? ? - 265, activation temperature ? ? 82-82 (according to ge dosage of 3% added to the 100-51 after 4 hours of epoxy resin can produce the crosslinking temperature), the appearance is light yellow to white, crystalline, often used as promote into crosslinked agent.
It can serve as dicyandiamide, two hydrazide, anhydride, phenolic resin and phenolics crosslinking agent promoter. General in the powder coating additives for the resin content of 0.1% to 0.6%, in the heavy-duty epoxy powder coating used for phenolic crosslinking agent promoter when the dosage of 0.6% to 0.6%.
The disadvantage is that: the coating color easy yellowing, effects of powder coatings in different degrees storage period. Imidazole adduct, sometimes referred to as the bonus imidazole, EPI - CUREP101 famous products. It is A 1:1 or 1.5 :1 equivalent ratio of 2 - methyl imidazole and Epon828 liquid bisphenol A epoxy resin reaction products.
Imidazole adduct can alone can also be combined with other non catalytic crosslinker use. Used alone can provide the best crosslinking performance at low temperature, other crosslinking agent combination can provide better application effect, so the crosslinking agent plays a more and more is the role of catalyst.
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.
And imidazole compounds, as to it simply as a promoter of powder coating is not appropriate, because it can reduce the storage stability of the powder coating and lead to serious agglomeration and eventually lose industrial applications.
Most of aliphatic and aromatic primary amine with secondary amine are solid at room temperature, but they cannot be used as a crosslinking agent in epoxy powder coating, because the system of high reactivity, in extrusion processing can cause many problems, also can significantly reduce the storage stability of coatings.
Has developed several kinds of amine derivatives in the powder coating composition combined with solid epoxy resin can provide the necessary stability.
Multiple amine is not belong to a polyol, but it in polyurethane synthesis with polyol up effect similar to that of strictly speaking the polymer obtained cannot be named pu, shall be referred to as poly (amino formamide or polyurea, however, as a people will usually polyurethane class discussion.
The most commonly used multivariate amine has 3, 3 'two chlorine - 4, 4' : diphenyl methane diamine (MOCA) and propylene glycol double - (4, 4 'two amino) benzoic acid ester.
Other oligomer polyols, such as hydroxyl silicone resin is often used in special circumstances.
Copyright: Zhang Jia Gang YaRui Chemical co.,Ltd
Diethyl toluene diamine(DETDA) http://www.yaruichem.com
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