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Polyamine admixture coating crosslinking agent
2017-8-28 11:42:41
Polyamine admixture coating crosslinking agent
The polyamide admixture used in the powder coatings industry is mainly used for low temperature/rapid crosslinking.
Multiple amine adduct crosslinking agent is usually used for addition of amine aliphatic and aromatic primary amine or secondary amine, multiple amine adduct crosslinking agent of amine has: dimethylamine, diethylenetriamine, four ethylene amine, 4, 4 '- diamino diphenyl methane, alicyclic amine such as 1, 2 or 1, 4-2 amino cyclohexane and so on.
It is believed that the addition of polyamine and epoxy resin is not as catalytic activity as imidazole.Bonus is one of the purposes of the liquid epoxy crosslinking agent into a product can be used by powder coating industry of solid, but chooses for the addition of amine liquid cannot have high volatility;On the other hand, solid products such as 4, 4 '-diamino-diphenylmethane [4, 4' -diamino-diphenylmethane] can be improved to improve their dispersion in the epoxy components.Usually the reaction activity of the raw materials used for the purpose of addition is too high to be used directly for the preparation of powder coatings.
In most case, it is prior to coating components other than multiple amine adduct store mixed extrusion pelleting, then match the amount of crosslinking adduct grinding together, this is the use of this kind of crosslinking agent preparation of low-temperature crosslinking powder coating is the most effective method.The combination of polyamide and imidazole is used for the application of MDF, wood products, plastic and other heat-sensitive substrate needed for low temperature crosslinking.
In the same way, cross-linking agents such as fast crosslinking, thermal melting and sintering coatings are showing an increasingly important role.In any coating system containing epoxy components this kind of polyamine addition is also effective crosslinking accelerant.
Chinese name: Diethyl toluene diamine(DETDA)
Physical and chemical properties: light yellow transparent liquid, slightly soluble in water, soluble in alcohols, ethers, ketones and other polar organic solvents, and polyether, polyester polyol compatibility.
Density 1.022
Viscosity (20 ℃) ??mPa·ss290±10
Pour Point ℃-9
Boiling point of310°C
The polyamide admixture used in the powder coatings industry is mainly used for low temperature/rapid crosslinking.
Multiple amine adduct crosslinking agent is usually used for addition of amine aliphatic and aromatic primary amine or secondary amine, multiple amine adduct crosslinking agent of amine has: dimethylamine, diethylenetriamine, four ethylene amine, 4, 4 '- diamino diphenyl methane, alicyclic amine such as 1, 2 or 1, 4-2 amino cyclohexane and so on.
It is believed that the addition of polyamine and epoxy resin is not as catalytic activity as imidazole.Bonus is one of the purposes of the liquid epoxy crosslinking agent into a product can be used by powder coating industry of solid, but chooses for the addition of amine liquid cannot have high volatility;On the other hand, solid products such as 4, 4 '-diamino-diphenylmethane [4, 4' -diamino-diphenylmethane] can be improved to improve their dispersion in the epoxy components.Usually the reaction activity of the raw materials used for the purpose of addition is too high to be used directly for the preparation of powder coatings.
In most case, it is prior to coating components other than multiple amine adduct store mixed extrusion pelleting, then match the amount of crosslinking adduct grinding together, this is the use of this kind of crosslinking agent preparation of low-temperature crosslinking powder coating is the most effective method.The combination of polyamide and imidazole is used for the application of MDF, wood products, plastic and other heat-sensitive substrate needed for low temperature crosslinking.
In the same way, cross-linking agents such as fast crosslinking, thermal melting and sintering coatings are showing an increasingly important role.In any coating system containing epoxy components this kind of polyamine addition is also effective crosslinking accelerant.
Chinese name: Diethyl toluene diamine(DETDA)
Physical and chemical properties: light yellow transparent liquid, slightly soluble in water, soluble in alcohols, ethers, ketones and other polar organic solvents, and polyether, polyester polyol compatibility.
Density 1.022
Viscosity (20 ℃) ??mPa·ss290±10
Pour Point ℃-9
Boiling point of310°C
Flash Point°C161.1°C
Multiple amine is not belong to a polyol, but it in polyurethane synthesis with polyol up effect similar to that of strictly speaking the polymer obtained cannot be named pu, shall be referred to as poly (amino formamide or polyurea, however, as a people will usually polyurethane class discussion.
Dimethylamine is a gas at room temperature.There is a smell of ammonia.Relative density 0.680 (0 ℃).Melting point - 96 ℃.Boiling point 7 ℃.Soluble in water, soluble in ethanol and ether.Easy to burn.There is weak alkalinity, and inorganic acid formation is soluble in water salt.Used as raw material for pharmaceutical, dye, insecticide and rubber vulcanization accelerator.Ammonia and methanol are produced by high temperature and high pressure and catalyst.
4, 4 '-diaminodiphenylmethane is used as the high temperature crosslinking agent for epoxy resin adhesive, and the reference dosage is 26 ~ 30, the best dosage is 28, and the applicable period is 8h (100g).Crosslinking conditions of 80 ℃ / 2 h + 165 ℃ or 160 ℃ / 2 h/h (4 ~ 5).Crosslinked heat deformation temperature of 150 ℃, 0.1% water imbibition.DDM reactivity is lower than that of phthalamide, which has a better color than the diphenylenediamine, but has long been turned to dark brown after exposure to sunlight.DDM with dimethyl sulfonium toluene diamine (DADMT) blend available for long period (10 h) at room temperature and 100 ℃ crosslinking temperature of crosslinking agent.
Used for adhesive, laminate and coating.It is also used as a vulcanization accelerator for hydro-butyl rubber and latex and used as a thiazole promoter and active agent in natural rubber and styrene butadiene rubber.It is also used to make diisocyanate, polyamide and so on.
Thermoplastic polymers with high molecular weight are also very effective in preventing the production of powder coatings.One example was polyvinyl butyral, which was used as a leveling agent in the 1960s.Since they have a high melting point, it is difficult to disperse to the resin melt in the extrusion, so it is soon replaced by the liquid polyacrylic acid.
Copyright: Zhang Jia Gang YaRui Chemical co.,Ltd
Multiple amine is not belong to a polyol, but it in polyurethane synthesis with polyol up effect similar to that of strictly speaking the polymer obtained cannot be named pu, shall be referred to as poly (amino formamide or polyurea, however, as a people will usually polyurethane class discussion.
Dimethylamine is a gas at room temperature.There is a smell of ammonia.Relative density 0.680 (0 ℃).Melting point - 96 ℃.Boiling point 7 ℃.Soluble in water, soluble in ethanol and ether.Easy to burn.There is weak alkalinity, and inorganic acid formation is soluble in water salt.Used as raw material for pharmaceutical, dye, insecticide and rubber vulcanization accelerator.Ammonia and methanol are produced by high temperature and high pressure and catalyst.
4, 4 '-diaminodiphenylmethane is used as the high temperature crosslinking agent for epoxy resin adhesive, and the reference dosage is 26 ~ 30, the best dosage is 28, and the applicable period is 8h (100g).Crosslinking conditions of 80 ℃ / 2 h + 165 ℃ or 160 ℃ / 2 h/h (4 ~ 5).Crosslinked heat deformation temperature of 150 ℃, 0.1% water imbibition.DDM reactivity is lower than that of phthalamide, which has a better color than the diphenylenediamine, but has long been turned to dark brown after exposure to sunlight.DDM with dimethyl sulfonium toluene diamine (DADMT) blend available for long period (10 h) at room temperature and 100 ℃ crosslinking temperature of crosslinking agent.
Used for adhesive, laminate and coating.It is also used as a vulcanization accelerator for hydro-butyl rubber and latex and used as a thiazole promoter and active agent in natural rubber and styrene butadiene rubber.It is also used to make diisocyanate, polyamide and so on.
Thermoplastic polymers with high molecular weight are also very effective in preventing the production of powder coatings.One example was polyvinyl butyral, which was used as a leveling agent in the 1960s.Since they have a high melting point, it is difficult to disperse to the resin melt in the extrusion, so it is soon replaced by the liquid polyacrylic acid.
Copyright: Zhang Jia Gang YaRui Chemical co.,Ltd
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