News Details
Imidazole derivative coating crosslinking agent
2017-5-4 11:52:07
Imidazole derivative coating crosslinking agent.Veronique et al., using different imidazole and various chloro-formate reactions, the resulting product can be used as a low temperature crosslinking agent for epoxy resin and crosslinking accelerator. For example, 100 g of bisphenol A type of glycidyl ester with formic acid benzyl ester chloride 14.5 g / 2 - phenyl imidazole reaction product mix, gel time is 6 min15s under 130 ℃, 150 ℃ under the gel time of 3 min15s, gel time of 2 min30s under 150 ℃.
Kaufman, etc with imidazole or replace imidazole containing unsaturated double bond of acrylic ester compounds addition reaction, and then with fatty acid or binary carboxylic acid neutralization reaction of imidazole or replace imidazole to preparation of adduct, these adduct products also can be used as a crosslinking agent with epoxy resin to form epoxy powder coating.
Using isocyanate (such as toluene diisocyanate) closed imidazole and its derivatives reactive group, the adduct also can be used in epoxy powder coating crosslinked promoter. In addition, toluene diisocyanate and 1 - (amino ethyl) - 2 - methyl imidazole adduct can be used as a system of one-component epoxy/dicyandiamide crosslinking promoter, such as epoxy 100, dicyandiamide 6 and 3.4 the adduct of the composition, 40 ℃ for 10 d viscosity didn't change, and in 170 ℃ / 6 s crosslinking.
Imidazole is between molecular structure containing two nitrogen atoms of the five yuan of aromatic heterocyclic compound, imidazole ring 1 - a nitrogen atom in the lone electron pair in annular conjugate, electron density of nitrogen atom is reduced, on the nitrogen atom of hydrogen is easy to form hydrogen ions to leave. It is acidic and alkaline, which can form salt with strong alkali.
Imidazole is more likely than other 1, 3-diazole to have a pro-electric aromatic substitution, and the reaction is mainly done on c-4 and c-5. This is because when the electrophile attacks c-2, there is a particularly unstable limit, and the resulting intermediates distribute the positive charge on the nitrogen. For example, imidazole and nitric acid/concentrated sulphuric acid can quickly produce a high yield of 4 (5) -nitroimidazole. And 4, 5-dimethylimidazole is nitrified under severe conditions and still can't react.
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).
The density of the electron in the imidazole N - 3 is larger, so the alkylation reaction occurs first on the nitrogen. A product of alkylated by tautomerism, and can produce a similar to the nitrogen atom of pyridine, so can be further reaction, generate the product of two alkylation imidazole Weng salt.
Acyl reaction of imidazole generally also occur on the N - 3, but as a result of acyl is electron-withdrawing group, so the reaction can be controlled in a yuan acetoxylation stage, the product is N - acyl imidazole.
The active hydrogen of imidazole can break down the gris's reagent, the n-magnesium salt of the imidazole, and the imidazole, which is replaced by c-2 after isomerisation. The latter is treated with iodide, which can produce 1, 2-dimethyl imidazole.
Imidazole can be added to the pro-diene body, and the husband is 3-onium salt, and then with the other molecule, the nucleophilic affinity, the product of c-2 cyclation. Such as 1 - methyl - 2 - ethyl imidazole acetylene with two molecules of butyl diacid dimethyl reaction after get 8 a 1 - methyl - 1, 8 - ethyl - a - 2 hydrogen imidazole and [1, 2 - a] pyridine - 5,6,7,8 - four carboxylic acid methyl ester.
Imidazole can compete with histidine in combination with Ni ions, so in biological technology, imidazole can be used to wash off the fusion protein with His -tag.
Imidazole can be used as a epoxy crosslinking agent, can improve the products of the bending, stretching, compression, such as mechanical properties, improve the performance of insulation, improve the chemical performance of resistance to chemicals, widely used in computers, electrical appliances.
Copyright: Zhang Jia Gang YaRui Chemical co.,Ltd
Diethyl toluene diamine(DETDA) http://www.yaruichem.com
Kaufman, etc with imidazole or replace imidazole containing unsaturated double bond of acrylic ester compounds addition reaction, and then with fatty acid or binary carboxylic acid neutralization reaction of imidazole or replace imidazole to preparation of adduct, these adduct products also can be used as a crosslinking agent with epoxy resin to form epoxy powder coating.
Using isocyanate (such as toluene diisocyanate) closed imidazole and its derivatives reactive group, the adduct also can be used in epoxy powder coating crosslinked promoter. In addition, toluene diisocyanate and 1 - (amino ethyl) - 2 - methyl imidazole adduct can be used as a system of one-component epoxy/dicyandiamide crosslinking promoter, such as epoxy 100, dicyandiamide 6 and 3.4 the adduct of the composition, 40 ℃ for 10 d viscosity didn't change, and in 170 ℃ / 6 s crosslinking.
Imidazole is between molecular structure containing two nitrogen atoms of the five yuan of aromatic heterocyclic compound, imidazole ring 1 - a nitrogen atom in the lone electron pair in annular conjugate, electron density of nitrogen atom is reduced, on the nitrogen atom of hydrogen is easy to form hydrogen ions to leave. It is acidic and alkaline, which can form salt with strong alkali.
Imidazole is more likely than other 1, 3-diazole to have a pro-electric aromatic substitution, and the reaction is mainly done on c-4 and c-5. This is because when the electrophile attacks c-2, there is a particularly unstable limit, and the resulting intermediates distribute the positive charge on the nitrogen. For example, imidazole and nitric acid/concentrated sulphuric acid can quickly produce a high yield of 4 (5) -nitroimidazole. And 4, 5-dimethylimidazole is nitrified under severe conditions and still can't react.
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).
The density of the electron in the imidazole N - 3 is larger, so the alkylation reaction occurs first on the nitrogen. A product of alkylated by tautomerism, and can produce a similar to the nitrogen atom of pyridine, so can be further reaction, generate the product of two alkylation imidazole Weng salt.
Acyl reaction of imidazole generally also occur on the N - 3, but as a result of acyl is electron-withdrawing group, so the reaction can be controlled in a yuan acetoxylation stage, the product is N - acyl imidazole.
The active hydrogen of imidazole can break down the gris's reagent, the n-magnesium salt of the imidazole, and the imidazole, which is replaced by c-2 after isomerisation. The latter is treated with iodide, which can produce 1, 2-dimethyl imidazole.
Imidazole can be added to the pro-diene body, and the husband is 3-onium salt, and then with the other molecule, the nucleophilic affinity, the product of c-2 cyclation. Such as 1 - methyl - 2 - ethyl imidazole acetylene with two molecules of butyl diacid dimethyl reaction after get 8 a 1 - methyl - 1, 8 - ethyl - a - 2 hydrogen imidazole and [1, 2 - a] pyridine - 5,6,7,8 - four carboxylic acid methyl ester.
Imidazole can compete with histidine in combination with Ni ions, so in biological technology, imidazole can be used to wash off the fusion protein with His -tag.
Imidazole can be used as a epoxy crosslinking agent, can improve the products of the bending, stretching, compression, such as mechanical properties, improve the performance of insulation, improve the chemical performance of resistance to chemicals, widely used in computers, electrical appliances.
Copyright: Zhang Jia Gang YaRui Chemical co.,Ltd
Diethyl toluene diamine(DETDA) http://www.yaruichem.com
-
Isopropylphenyl Phosphate(IPPP50)
-
-
Tris(2-chloroisopropyl)Phosphate(TCPP)
-
-
Triphenyl Phosphite (TPPI)
-
-
Triphenyl Phosphate (TPP)
-
-
Triethyl Phosphate (TEP)
-
-
4-Chlorobenzoic acid (PBCA)
-
-
Dimethyl thiotoluene diamine(DMTDA)
-
-
Diethyl toluene diamine(DETDA)
-
-
9-anthracene
-
-
Trimethyl Phosphate (TMP)
-
-
Isopropylphenyl Phosphate(IPPP65)
-
-
Antioxidant Stabilizers|Defoamers|Penetrants
-
-
Isopropylphenyl Phosphate(IPPP35)
-
-
Tris(2-butoxyethyl)phosphate(TBEP)
-
-
Trixylyl Phosphate(TXP)
-
-
4,4'-Methylenebis(N-sec-butylaniline)-MDBA
-
-
Diphenyl Isooctyl Phosphate-DPOP-S141
-
-
Diphenyl Isodecyl Phosphate-DPDP-S148
-
-
Cresyl Diphenyl Phosphate(CDP)
-
-
Tris(1,3-Dichloro-2-Propyl)Phosphate
-
-
Curing Agents|Chain Extenders|Crosslinking Agents
-
-
2,2-Bis(Hydroxymethyl)Propionic Acid|DMPA
-
Poly(1,4-Butanediol) Bis(4-Aminobenzoate)|P-1000
-
3-Hydroxyethyloxyethyl-1-Hydroxyethylbenzenediene
-
1,3-Bis(2-Hydroxyethoxy)Benzene|HER-Solid
-
Chain Extender HQEE-Liquid
-
Hydroquinone Bis(2-Hydroxyethyl)Ether|HQEE-Solid
-
4,4'-Methylene-bis (3-chloro-2,6-diethylaniline)
-
Alicyclic Amine Curing Agent Chain Extender HTDA
-
Triallyl Isocyanurate|Crosslinker TAIC
-
2,2-Bis(Hydroxymethyl)Butyric Acid|DMBA
-
4,4'-Methylenebis(2-Ethylbenzenamine)|MOEA
-
4,4'-Methylenebis(2,6-diethylaniline)|MDEA
-
4,4'-Methylenebis(2-ethyl-6-methylaniline)|MMEA
-
4,4'-Diaminodicyclohexyl Methane|PACM,HMDA
-
Cycloaliphatic Curing Agent Chain Extender MACM
-
3-Chloro-3'-Ethyl-4,4'-Diaminodiphenylmethane
-
-
Flame Retardants|Plasticizers
-
-
Isopropylphenyl Phosphate(IPPP95)
-
-
Trihexyl Phosphate(THP)
-
-
Triisobutyl Phosphate (TIBP)
-
-
1-Phenyl-3-Methyl-5-Pyrazolone(PMP)
-
-
Tris(2-chloroethyl)phosphate(TCEP)
-
- News List
-
It ACTS as an auxiliary antiox -
The properties of phenolic ant -
Amine antioxidants -
Thermoplastic anti-oxygen agen -
Plastic auxiliary antioxidant -
Molecular structure of antioxi -
High polymer antioxidants -
General-purpose plastic antiox -
Phosphoric acid ester auxiliar -
Antioxidant compound products -
Polypropylene complex antioxid -
Compatibility of antioxidants -
Industrial plastic composite a -
An antioxidant for polymers -
PVC resin antioxidant