News Details
Compound amine coating crosslinking agent
2017-5-10 15:43:57
Compound amine coating crosslinking agent:Three kinds of complex amine crosslinking agents were made with TY650 polyamide and amine addition.
Epoxy iron red coating and film crosslinking density. Using the mixed crosslinking agent of active hydrogen, the main agent of epoxy groups of epoxy resin coating < 1 (amount of substance ratio), mixture into 4 kinds of iron red epoxy coatings and calculation of the crosslinking density of the coating.
Iron red epoxy coating preparation: in the face, back side after grinding and cleaning of iron plate, with a good iron red epoxy coating is on, the back and edges, after coating, 1 in (25 + / - 5 ℃ for 24 h, then 2 layers coating, coating after under (25 + / - 5 ℃ for 24 h, then in 80 ~ 85 ℃ under crosslinking 60 min, specimens for resistance to salt water and the boiling water.
Ratio of weighing the main agent and crosslinking agent, after thoroughly incorporated, curing 40 min under 20 ~ 30 ℃, besmear on the specimens prepared salt fog resistance. A total of 2 layers coating, total dry film thickness of 120 microns, or had finished 1 is the tao in 20 ~ 30 ℃ for 24 h, then 2 layers coating, coating under 20 ~ 30 ℃ placed after 48 h, finally crosslinking 60 min under 80 ℃, specimens for resistance to salt fog.
Red iron oxide epoxy coating corrosion resistance: four formula formed by iron red epoxy coating by 3.5% salt water resistant (65 + 1) ℃, resistance to boiling water and salt spray test.
The corrosion resistance of epoxy iron oxide coating: it is known that the higher the crosslinking density of the coating, the better the resistance of the coating. Using complex matches crosslinking agent to form coating formula (8, 9 and 10) boiling water resistance increase with the increase of crosslinking density coating, add amine adduct in TY650 boiling water to have a negative impact, such as excluding amine adduct formed formula 7 coating resistance to boiling water for 168 h.
In complex matches crosslinking agent, to participate in the distribution of primitive ratio of crosslinking agent on the coating resistance to salt fog effect is great, if you want to improve TY650 polyamide crosslinking, salt fog resistance of epoxy coating can be adjusted after matches the amount of crosslinking agent of amine adduct, in order to achieve the desired effect.
In epoxy coating structure is destroyed by seepage medium under the premise of crosslinking density prediction with film coating corrosive medium penetration resistance and corrosion resistance, for epoxy anti-corrosion coating formula design for reliable information.
After matches crosslinking agent Ⅰ in alternative TY650 polyamide manufacturing high solid iron red epoxy anticorrosive paint, to significantly improve the corrosion resistance of coating, created the new ideas and new methods. Adopting the new development of quick drying, crosslinking agent, epoxy powder coating manufacturing three at 175 ℃ / min cross-linking cross-linking, epoxy powder anticorrosive coatings for the development of high-end varieties, opened up a new way.
Amino nitrogen atoms in the structure, much like in the ammonia nitrogen atoms, is based on three sp or hydroxyl connected with hydrogen, hybrid orbitals formed a pyramid, leaving a sp3 hybridization orbit by a lone electron pair. If an amine has three different groups, it should have a pair of enantiomers (see enantiomers).
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
But because the lone electron in the flipped amine is very low in the activation energy required, it fails to isolate the enantiomer.
The experiments show that the amine and ammonia molecules have a pyramidal structure, and the nitrogen atoms are sp3 hybridized and the key angles are about 109 degrees. In amine molecules, three sp3 hybridized orbital respectively in the s orbital of hydrogen or carbon atoms of hybrid orbital overlap to form three 6 keys, left a lone pair electrons occupy the fourth sp3 orbitals, located in the edge at the top of the vertebral bodies.
Aniline is also a pyramidal structure, but the h-n-h key is larger, at 113.9 degrees, and the n-n-h plane has a 38 degree Angle to the benzene ring.
If there are three different groups on the nitrogen in the amine molecule, there should be a pair of enantiomers in theory.
Due to the energy barrier between the two enantiomers is quite low, approximately 21 kj/mol, can rapidly at room temperature conversion, actually such enantiomer have yet to be partition.
In quaternary ammonium salt, the four sp3 orbitals of nitrogen are all used for bonding, and if there are four different groups on the nitrogen, there are enantiomers. For example, iodized methylphenylbenzylphenylbenzylamine is split into the right and left optical isomers.
Copyright: Zhang Jia Gang YaRui Chemical co.,Ltd
Diethyl toluene diamine(DETDA) http://www.yaruichem.com
Epoxy iron red coating and film crosslinking density. Using the mixed crosslinking agent of active hydrogen, the main agent of epoxy groups of epoxy resin coating < 1 (amount of substance ratio), mixture into 4 kinds of iron red epoxy coatings and calculation of the crosslinking density of the coating.
Iron red epoxy coating preparation: in the face, back side after grinding and cleaning of iron plate, with a good iron red epoxy coating is on, the back and edges, after coating, 1 in (25 + / - 5 ℃ for 24 h, then 2 layers coating, coating after under (25 + / - 5 ℃ for 24 h, then in 80 ~ 85 ℃ under crosslinking 60 min, specimens for resistance to salt water and the boiling water.
Ratio of weighing the main agent and crosslinking agent, after thoroughly incorporated, curing 40 min under 20 ~ 30 ℃, besmear on the specimens prepared salt fog resistance. A total of 2 layers coating, total dry film thickness of 120 microns, or had finished 1 is the tao in 20 ~ 30 ℃ for 24 h, then 2 layers coating, coating under 20 ~ 30 ℃ placed after 48 h, finally crosslinking 60 min under 80 ℃, specimens for resistance to salt fog.
Red iron oxide epoxy coating corrosion resistance: four formula formed by iron red epoxy coating by 3.5% salt water resistant (65 + 1) ℃, resistance to boiling water and salt spray test.
The corrosion resistance of epoxy iron oxide coating: it is known that the higher the crosslinking density of the coating, the better the resistance of the coating. Using complex matches crosslinking agent to form coating formula (8, 9 and 10) boiling water resistance increase with the increase of crosslinking density coating, add amine adduct in TY650 boiling water to have a negative impact, such as excluding amine adduct formed formula 7 coating resistance to boiling water for 168 h.
In complex matches crosslinking agent, to participate in the distribution of primitive ratio of crosslinking agent on the coating resistance to salt fog effect is great, if you want to improve TY650 polyamide crosslinking, salt fog resistance of epoxy coating can be adjusted after matches the amount of crosslinking agent of amine adduct, in order to achieve the desired effect.
In epoxy coating structure is destroyed by seepage medium under the premise of crosslinking density prediction with film coating corrosive medium penetration resistance and corrosion resistance, for epoxy anti-corrosion coating formula design for reliable information.
After matches crosslinking agent Ⅰ in alternative TY650 polyamide manufacturing high solid iron red epoxy anticorrosive paint, to significantly improve the corrosion resistance of coating, created the new ideas and new methods. Adopting the new development of quick drying, crosslinking agent, epoxy powder coating manufacturing three at 175 ℃ / min cross-linking cross-linking, epoxy powder anticorrosive coatings for the development of high-end varieties, opened up a new way.
Amino nitrogen atoms in the structure, much like in the ammonia nitrogen atoms, is based on three sp or hydroxyl connected with hydrogen, hybrid orbitals formed a pyramid, leaving a sp3 hybridization orbit by a lone electron pair. If an amine has three different groups, it should have a pair of enantiomers (see enantiomers).
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
But because the lone electron in the flipped amine is very low in the activation energy required, it fails to isolate the enantiomer.
The experiments show that the amine and ammonia molecules have a pyramidal structure, and the nitrogen atoms are sp3 hybridized and the key angles are about 109 degrees. In amine molecules, three sp3 hybridized orbital respectively in the s orbital of hydrogen or carbon atoms of hybrid orbital overlap to form three 6 keys, left a lone pair electrons occupy the fourth sp3 orbitals, located in the edge at the top of the vertebral bodies.
Aniline is also a pyramidal structure, but the h-n-h key is larger, at 113.9 degrees, and the n-n-h plane has a 38 degree Angle to the benzene ring.
If there are three different groups on the nitrogen in the amine molecule, there should be a pair of enantiomers in theory.
Due to the energy barrier between the two enantiomers is quite low, approximately 21 kj/mol, can rapidly at room temperature conversion, actually such enantiomer have yet to be partition.
In quaternary ammonium salt, the four sp3 orbitals of nitrogen are all used for bonding, and if there are four different groups on the nitrogen, there are enantiomers. For example, iodized methylphenylbenzylphenylbenzylamine is split into the right and left optical isomers.
Copyright: Zhang Jia Gang YaRui Chemical co.,Ltd
Diethyl toluene diamine(DETDA) http://www.yaruichem.com
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