News Details
Epoxy crosslinking agent type coating
2017-4-15 23:52:06
Epoxy crosslinking agent type coating,Three different melamine urea acid glycidyl ester/TGIC, Triglycidylisocyanurate different melamine urea acid three glycidyl ester resin containing carboxyl functional groups is the most important one of the crosslinking agent, especially in carboxylic acid polyester.
The chemical structure of TGIC is the following: its three epoxy functional groups provide plenty of activity, and the stability of the triazine ring ensures good heat resistance and weather resistance.
After more than 20 years of development, use it as the main crosslinker of outdoor weatherability powder coating system has developed quite mature, can provide variety is complete, a full range of high and low light, texture, super weather resistance and high and low temperature crosslinking varieties, such as this is unmatched by any other system.
To be sure, there has been no can completely replace the TGIC varieties before, it is still the preferred crosslinking agent.
China is the largest provider of TGIC and consumers. Primid due to its main substitute product can't meet like aluminum alloy construction profiles of strict requirements, combined with the United States still use TGIC, so for quite a long time it will not withdraw from the stage.
TGIC synthesis is in ammonium halide or halogenated phosphine, in the presence of catalyst by heating in a large amount of excess epichlorohydrin cyanuric acid, then by using alkaline catalyst halogenated alcohol to take off hydrogen halide generated TGIC products, at the same time distilled from excessive epichlorohydrin, and will get the crude product of purified by recrystallization method.
TGIC epoxy equivalent theory is 99, but due to the part of the condensation and hydrolysis during storage, epoxy equivalent value on the high side, in the range of 105 to 110. Low when the epoxy value is characteristic of TGIC is quite important.
Chinese name: Diethyl toluene diamine(DETDA)
Chinese alias: aryl, aryl diethyl - aryl - methyl-p-phenylenediamine
English name: Benzenediamine, ar, ar-diethyl-ar-methyl-English aliases:Diethyltoluenediamine; ar, ar-Diethyl-ar-methylbenzenediamine;Diethylmethylbenzenediamine;
CAS No. :68479-98-1
EINECS No. :270 -877-4
Molecular formula: C11H18N2
Molecular Weight: 178.28
Boiling point: 310 ℃
Refractive index: 1.581
Flash Point: > 140 ℃
Inchi: InChI = 1/C11H18N2/c1-4-8-6-7 (3) 10 (12) 11 (13) 9 (8) 5-2/h6H ,4-5,12-13H2 ,1-3H3 density : 1.022
Risk Codes: R10; R35
RIDADR: UN 3082
Safety instructions: S2; S26; S39; S61
Packing Group: III
Hazard Class: 6.1
Low molecular weight materials in powder coating ingredients can reduce the glass transition temperature (Tg) of the system, the storage stability of the coating have a negative impact. The eu decision since May 1998, TGIC signed T tag must be used (with a skull and crossbones as a symbol of toxic) and attach relevant dangerous! In the words.
Powder coating of the varieties, although there is no like solvent coating is various, but it is a powder coating polymer resin is very much also. The general can be divided into thermosetting and thermoplastic two kinds big.
Thermosetting powder coating refers to thermosetting resin as film forming material, after joining the crosslinking reaction of curing agent, heating to form insoluble not melt the hard coating. Like coating to also won't like thermoplastic coating temperature to soften, but to decompose.
Because of thermosetting powder coating resin as adopted by the low degree of polymerization of prepolymer, low molecular weight, so the coating has good flowing property, good decorative, and low molecular weight of prepolymer after curing, can form a mesh crosslinking macromolecules, thus coating has good corrosion and mechanical performance. So the thermosetting powder coating is especially rapid development.
Due to the excellent epoxy powder coating and metal bonding strength, corrosion resistance, hardness, flexibility and impact strength, so is the first application of varieties of thermosetting powder coating.
The preparation of Epoxy powder coating is composed of Epoxy Resin (Epoxy Resin), curing agent, curing agent, pigment (pigment), packing (filler) and other additives (assistant). These components on the properties of the powder coating formed by the contribution is restricted and influenced each other, a suitable formula, in fact is the result of the coordination of various components.
Copyright: Zhang Jia Gang YaRui Chemical co.,Ltd
Diethyl toluene diamine(DETDA) http://www.yaruichem.com
The chemical structure of TGIC is the following: its three epoxy functional groups provide plenty of activity, and the stability of the triazine ring ensures good heat resistance and weather resistance.
After more than 20 years of development, use it as the main crosslinker of outdoor weatherability powder coating system has developed quite mature, can provide variety is complete, a full range of high and low light, texture, super weather resistance and high and low temperature crosslinking varieties, such as this is unmatched by any other system.
To be sure, there has been no can completely replace the TGIC varieties before, it is still the preferred crosslinking agent.
China is the largest provider of TGIC and consumers. Primid due to its main substitute product can't meet like aluminum alloy construction profiles of strict requirements, combined with the United States still use TGIC, so for quite a long time it will not withdraw from the stage.
TGIC synthesis is in ammonium halide or halogenated phosphine, in the presence of catalyst by heating in a large amount of excess epichlorohydrin cyanuric acid, then by using alkaline catalyst halogenated alcohol to take off hydrogen halide generated TGIC products, at the same time distilled from excessive epichlorohydrin, and will get the crude product of purified by recrystallization method.
TGIC epoxy equivalent theory is 99, but due to the part of the condensation and hydrolysis during storage, epoxy equivalent value on the high side, in the range of 105 to 110. Low when the epoxy value is characteristic of TGIC is quite important.
Chinese name: Diethyl toluene diamine(DETDA)
Chinese alias: aryl, aryl diethyl - aryl - methyl-p-phenylenediamine
English name: Benzenediamine, ar, ar-diethyl-ar-methyl-English aliases:Diethyltoluenediamine; ar, ar-Diethyl-ar-methylbenzenediamine;Diethylmethylbenzenediamine;
CAS No. :68479-98-1
EINECS No. :270 -877-4
Molecular formula: C11H18N2
Molecular Weight: 178.28
Boiling point: 310 ℃
Refractive index: 1.581
Flash Point: > 140 ℃
Inchi: InChI = 1/C11H18N2/c1-4-8-6-7 (3) 10 (12) 11 (13) 9 (8) 5-2/h6H ,4-5,12-13H2 ,1-3H3 density : 1.022
Risk Codes: R10; R35
RIDADR: UN 3082
Safety instructions: S2; S26; S39; S61
Packing Group: III
Hazard Class: 6.1
Low molecular weight materials in powder coating ingredients can reduce the glass transition temperature (Tg) of the system, the storage stability of the coating have a negative impact. The eu decision since May 1998, TGIC signed T tag must be used (with a skull and crossbones as a symbol of toxic) and attach relevant dangerous! In the words.
Powder coating of the varieties, although there is no like solvent coating is various, but it is a powder coating polymer resin is very much also. The general can be divided into thermosetting and thermoplastic two kinds big.
Thermosetting powder coating refers to thermosetting resin as film forming material, after joining the crosslinking reaction of curing agent, heating to form insoluble not melt the hard coating. Like coating to also won't like thermoplastic coating temperature to soften, but to decompose.
Because of thermosetting powder coating resin as adopted by the low degree of polymerization of prepolymer, low molecular weight, so the coating has good flowing property, good decorative, and low molecular weight of prepolymer after curing, can form a mesh crosslinking macromolecules, thus coating has good corrosion and mechanical performance. So the thermosetting powder coating is especially rapid development.
Due to the excellent epoxy powder coating and metal bonding strength, corrosion resistance, hardness, flexibility and impact strength, so is the first application of varieties of thermosetting powder coating.
The preparation of Epoxy powder coating is composed of Epoxy Resin (Epoxy Resin), curing agent, curing agent, pigment (pigment), packing (filler) and other additives (assistant). These components on the properties of the powder coating formed by the contribution is restricted and influenced each other, a suitable formula, in fact is the result of the coordination of various components.
Copyright: Zhang Jia Gang YaRui Chemical co.,Ltd
Diethyl toluene diamine(DETDA) http://www.yaruichem.com
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