News Details
Crosslinking agent of compound amine coating
2017-8-23 11:18:38
Crosslinking agent of compound amine coating
It was mixed with TY650 polyamide and amine admixture into three compound amine crosslinking agents.
Epoxy iron - red coating and film - coated crosslinking density. The reactive hydrogen of the compound amine crosslinking agent is used: the epoxy base of epoxy resin in the paint main agent is < 1 (material ratio), which is prepared into 4 kinds of epoxy iron red coatings and the crosslinking density of the coating is calculated.
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: after four matches amine crosslinking agent 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 can be seen that the higher the cross-linking density of the coating, the better the water-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.
Chinese name: Diethyl toluene diamine(DETDA)
It was mixed with TY650 polyamide and amine admixture into three compound amine crosslinking agents.
Epoxy iron - red coating and film - coated crosslinking density. The reactive hydrogen of the compound amine crosslinking agent is used: the epoxy base of epoxy resin in the paint main agent is < 1 (material ratio), which is prepared into 4 kinds of epoxy iron red coatings and the crosslinking density of the coating is calculated.
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: after four matches amine crosslinking agent 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 can be seen that the higher the cross-linking density of the coating, the better the water-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.
Chinese name: Diethyl toluene diamine(DETDA)
Diethyltoluenediamine packing： net weight 200KG/ galvanized iron drum (a small cabinet pallet loaded 16 tons), 1000KG/IB barrels (a small cabinet loaded 18 tons or 23 tons of ISOTANK).
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).
But because the lone electron in the flipped amine molecule is very low for the activation energy, it can not isolate the enantiomers.
It is proved that the amine and ammonia molecules have the pyramidal pyramidal structure, the nitrogen atom is sp3 hybridization and the key Angle is 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 bond Angle is larger, 113.9 degrees, and the n-n-h plane and the plane of the benzene ring are 38 degrees.
If there are three different groups on the nitrogen atom of the amine molecule, it is chiral and theoretically there should be a pair of enantiomers.
Because the barrier between the two enantiomers is fairly low, about 21KJ/mol, it can be converted rapidly at room temperature, and the enantiomers are actually not broken.
In quaternary ammonium salt, the four sp3 orbitals of nitrogen are all used to form bonds. If there are four different groups on the nitrogen, there are enantiomers. For example, iodized methyl diphenylbenzylamine is split into the right and left optical isomers.
Copyright: Zhang Jia Gang YaRui Chemical co.,Ltd
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).
But because the lone electron in the flipped amine molecule is very low for the activation energy, it can not isolate the enantiomers.
It is proved that the amine and ammonia molecules have the pyramidal pyramidal structure, the nitrogen atom is sp3 hybridization and the key Angle is 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 bond Angle is larger, 113.9 degrees, and the n-n-h plane and the plane of the benzene ring are 38 degrees.
If there are three different groups on the nitrogen atom of the amine molecule, it is chiral and theoretically there should be a pair of enantiomers.
Because the barrier between the two enantiomers is fairly low, about 21KJ/mol, it can be converted rapidly at room temperature, and the enantiomers are actually not broken.
In quaternary ammonium salt, the four sp3 orbitals of nitrogen are all used to form bonds. If there are four different groups on the nitrogen, there are enantiomers. For example, iodized methyl diphenylbenzylamine is split into the right and left optical isomers.
Copyright: Zhang Jia Gang YaRui Chemical co.,Ltd
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