News Details
Paint crosslinking agent variety
2017-8-28 11:42:27
Paint crosslinking agent variety
Coating crosslinking agent varieties of more than 20 years ago a single amine crosslinking agent had the very big development, on the basis of kwai hydrazine, replace dicyandiamide and some anhydride class the development and application of crosslinking agent greatly improves the performance of epoxy powder coating.
The heat resistance of the crosslinking agent is generally in the level of aromatic polyamines.Type anionic polymerization (tertiary amine and imidazole antiquities), cationic polymerization (BF3 complex) heat resistance is basically the same, this is mainly from the reaction mechanism is different, but in the end all the reticular structure of ether bond.
According to crosslinking temperature, the crosslinking agent can be divided into four types: low temperature crosslinking agent crosslinking temperature under room temperature;Room temperature cross-linking agent crosslinking temperature to room temperature ~ 50 ℃;Medium temperature crosslinking agent is 50 ~ 100 ℃;High temperature cross-linking agent crosslinking temperature above 100 ℃.The crosslinking agent of low temperature crosslinking is very rare, and it has polyacrylate and polyisocyanate.Domestic production of T - 31 of modified amine, YH - 82 modified amine under 0 ℃ crosslinking.There are many kinds of crosslinking at room temperature: fatty polyamine and polyamide polyamide;Low molecular polyamide and modified aromatic amine.Some of the fatty cyclic polyamines, tertiary amines, squinazole and boron trifluoride complexes belong to the medium temperature crosslinking type.The high temperature crosslinking agent has aromatic polyamines, anhydride, methylphenolic resin, amino resin, dicyandiamide and hydrazide.
For high temperature crosslinking system, crosslinking temperature is generally divided into two stages, using low temperature crosslinking, in front of the gel in gel or a bit higher than the gel state of the state, after high temperature heating again after crosslinking, the relative segment for the middle to prepay.
The use of various auxiliaries, especially the new type of leveling agent, not only makes the film's fluidic and anti-shrinkage effect better, but also greatly improves the luster of the coating and the anti-high voltage electrostatic effect.
Epoxy powder coating has an important role in the development of powder coatings with excellent corrosion resistance, electrical insulation and physical mechanical strength.
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
Coating crosslinking agent varieties of more than 20 years ago a single amine crosslinking agent had the very big development, on the basis of kwai hydrazine, replace dicyandiamide and some anhydride class the development and application of crosslinking agent greatly improves the performance of epoxy powder coating.
The heat resistance of the crosslinking agent is generally in the level of aromatic polyamines.Type anionic polymerization (tertiary amine and imidazole antiquities), cationic polymerization (BF3 complex) heat resistance is basically the same, this is mainly from the reaction mechanism is different, but in the end all the reticular structure of ether bond.
According to crosslinking temperature, the crosslinking agent can be divided into four types: low temperature crosslinking agent crosslinking temperature under room temperature;Room temperature cross-linking agent crosslinking temperature to room temperature ~ 50 ℃;Medium temperature crosslinking agent is 50 ~ 100 ℃;High temperature cross-linking agent crosslinking temperature above 100 ℃.The crosslinking agent of low temperature crosslinking is very rare, and it has polyacrylate and polyisocyanate.Domestic production of T - 31 of modified amine, YH - 82 modified amine under 0 ℃ crosslinking.There are many kinds of crosslinking at room temperature: fatty polyamine and polyamide polyamide;Low molecular polyamide and modified aromatic amine.Some of the fatty cyclic polyamines, tertiary amines, squinazole and boron trifluoride complexes belong to the medium temperature crosslinking type.The high temperature crosslinking agent has aromatic polyamines, anhydride, methylphenolic resin, amino resin, dicyandiamide and hydrazide.
For high temperature crosslinking system, crosslinking temperature is generally divided into two stages, using low temperature crosslinking, in front of the gel in gel or a bit higher than the gel state of the state, after high temperature heating again after crosslinking, the relative segment for the middle to prepay.
The use of various auxiliaries, especially the new type of leveling agent, not only makes the film's fluidic and anti-shrinkage effect better, but also greatly improves the luster of the coating and the anti-high voltage electrostatic effect.
Epoxy powder coating has an important role in the development of powder coatings with excellent corrosion resistance, electrical insulation and physical mechanical strength.
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
Although in recent years, thanks to the development of other types of powder coatings in the whole of the powder coating proportion fell slightly, but with the development of new industry, the fields of application broadening, believe it will still occupies an important position in the development of powder coatings.
Although the epoxy powder coating is given priority to with bisphenol A type epoxy resin, mainly used in corrosion and rust and parts of matt powder coatings, etc., but the weather resistance of epoxy powder coating research and development work has been going on, mostly alicyclic epoxy resin and epoxy resin with glycidyl epoxy powder coating, including alicyclic epoxy resin and glycidyl ether alicyclic epoxy powder coating of epoxy resin shrinkage glycerides weathering resistance have been greatly improved, can be used in outdoor.
In addition, the resistance of powder coatings prepared by hydrogenated bisphenol A epoxy resin has been improved obviously.Because from this kind of weather the coating properties of epoxy powder coating and coating cost into account, can't see the advantage than polyester and polyurethane coating, also can not get extensive application in industrial production.
Epoxy powder coatings at home and abroad, a large number of applications in different diameter of oil, gas, plumbing pipeline inside and outside wall painting, and chemical material conveying pipeline, pipeline, mine support is of large ships, scaffolding, steel and other heavy anti-corrosion coating.
It is also used for electrical insulation coating with decorative requirements of instrument and meter housing, automobile and tractor parts, motor rotor and copper wire line.
The powder coating has been developing rapidly for more than 30 years due to its excellent comprehensive performance and environmental performance.But due to the requirement that the crosslinking temperature is usually above 140 degrees, the application of powder coatings to thermal materials such as wood, aluminum magnesium alloys, plastics and prefabricated parts was unimaginable a few years ago.
Copyright: Zhang Jia Gang YaRui Chemical co.,Ltd
Although in recent years, thanks to the development of other types of powder coatings in the whole of the powder coating proportion fell slightly, but with the development of new industry, the fields of application broadening, believe it will still occupies an important position in the development of powder coatings.
Although the epoxy powder coating is given priority to with bisphenol A type epoxy resin, mainly used in corrosion and rust and parts of matt powder coatings, etc., but the weather resistance of epoxy powder coating research and development work has been going on, mostly alicyclic epoxy resin and epoxy resin with glycidyl epoxy powder coating, including alicyclic epoxy resin and glycidyl ether alicyclic epoxy powder coating of epoxy resin shrinkage glycerides weathering resistance have been greatly improved, can be used in outdoor.
In addition, the resistance of powder coatings prepared by hydrogenated bisphenol A epoxy resin has been improved obviously.Because from this kind of weather the coating properties of epoxy powder coating and coating cost into account, can't see the advantage than polyester and polyurethane coating, also can not get extensive application in industrial production.
Epoxy powder coatings at home and abroad, a large number of applications in different diameter of oil, gas, plumbing pipeline inside and outside wall painting, and chemical material conveying pipeline, pipeline, mine support is of large ships, scaffolding, steel and other heavy anti-corrosion coating.
It is also used for electrical insulation coating with decorative requirements of instrument and meter housing, automobile and tractor parts, motor rotor and copper wire line.
The powder coating has been developing rapidly for more than 30 years due to its excellent comprehensive performance and environmental performance.But due to the requirement that the crosslinking temperature is usually above 140 degrees, the application of powder coatings to thermal materials such as wood, aluminum magnesium alloys, plastics and prefabricated parts was unimaginable a few years ago.
Copyright: Zhang Jia Gang YaRui Chemical co.,Ltd
Spanish
French
Italian
Portuguese
Japanese
Korean
Arabic
Russian