News Details
Aromatic and aliphatic amine crosslinking agent
2017-4-21 15:38:59
Aromatic and aliphatic amine 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 of 140? - 146? , the boiling point of 263? - 265? , the activation temperature of 82? - 87? (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.
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
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.
And imidazole compounds as discussed above, 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.
Aliphatic compounds refers to hydrocarbon is straight chain structure, but can be saturated and unsaturated hydrocarbon.
Alicyclic compounds refers to the hydrocarbon molecules contain carbon ring, which can be saturated and unsaturated carbon ring, a typical carbon ring ring and six-member ring five yuan, five yuan carbon ring of the more important is conjugate structure, and of course multiple hydrocarbon of ring structure, such as serial, and ring, new ring bridge hydrocarbon, etc.
Aromatic compounds is refers to the hydroxyl compounds containing benzene ring, which categories have polycyclic aromatic hydrocarbons and benzene series compounds. Benzene ring and polycyclic class, even the benzene in multi-loop class class, etc., and condensed in the class has completely by benzene fused type, such as naphthalene, anthracene, phenanthrene, and diversity and benzene class, other polycyclic aromatic hydrocarbon and benzene ring and cyclopentadiene ring combination of 5 yuan of multiple ring structure such as indene, fluorene and acenaphthene and heterocyclic compounds, etc.
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 of 140? - 146? , the boiling point of 263? - 265? , the activation temperature of 82? - 87? (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.
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
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.
And imidazole compounds as discussed above, 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.
Aliphatic compounds refers to hydrocarbon is straight chain structure, but can be saturated and unsaturated hydrocarbon.
Alicyclic compounds refers to the hydrocarbon molecules contain carbon ring, which can be saturated and unsaturated carbon ring, a typical carbon ring ring and six-member ring five yuan, five yuan carbon ring of the more important is conjugate structure, and of course multiple hydrocarbon of ring structure, such as serial, and ring, new ring bridge hydrocarbon, etc.
Aromatic compounds is refers to the hydroxyl compounds containing benzene ring, which categories have polycyclic aromatic hydrocarbons and benzene series compounds. Benzene ring and polycyclic class, even the benzene in multi-loop class class, etc., and condensed in the class has completely by benzene fused type, such as naphthalene, anthracene, phenanthrene, and diversity and benzene class, other polycyclic aromatic hydrocarbon and benzene ring and cyclopentadiene ring combination of 5 yuan of multiple ring structure such as indene, fluorene and acenaphthene and heterocyclic compounds, etc.
Copyright: Zhang Jia Gang YaRui Chemical co.,Ltd
Diethyl toluene diamine(DETDA) http://www.yaruichem.com
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