News Details
Epoxy/polyamide system coating crosslinking agent
2017-4-30 16:31:53
Epoxy/polyamide system coating crosslinking agent.Polyamide type of paint application can be used in the following areas: Marine coatings, industrial protective coatings, cistern and coating, water treatment, pulp and paper coating, coating equipment, coating and transportation.
Polyamide is made from the reaction of diuretic acid and polyethylamine, such as DETA or TETA. Usually at 13 ℃ temperature under construction when not using polyamide, when it's slow.
Epoxy/polyamide system if the phenolic tertiary amine such as the three - 2 minus 2 - (dimethyl amine methyl) phenol as crosslinking promoter could obtain feasible under low temperature (7 ~ 10 ℃) crosslinking rate. However, in order for the coating to have good properties (such as water resistance, corrosion resistance and chemical resistance), the amount of accelerator in the coating must be minimised. Another drawback of the epoxy/polyamide coatings with promoters is that the duration of the application is shorter.
Epoxy resins can be made from liquid epoxy resin to solid epoxy. Because the molecular weight of amine addition is increased, it is less corrosive and volatile than the unmodified matrix.
The most important thing is that amine addition is not easy to produce white, so they are especially suitable for low-temperature crosslinking coatings. However, the deficiency associated with these benefits significantly increases the viscosity of the crosslinking agent. To get a lower viscosity, amine addition is diluted with solvents or added plasticizers, such as benzylmethanol. In the case of low temperature crosslinking, an amine addition is often added as an accelerant in order for the performance of the final coat to accelerate.
Phenyl alkylamine crosslinking agent is a derivative of 3 - (p-5-8) phenol, which is the main component of cashew shell oil. Several polyfunctional phenylalkylamine, which has been developed for low temperature crosslinking, has been developed in this component. This type of crosslinking agent is usually darker and the depth of its color is related to its molecular weight. High viscosity.
This kind of crosslinking agent is a condensation compound that is produced by the chemical reactions of amine and phenol (or alkyl) and formaldehyde, which is usually called mannichbase. Although this response reduces the functional level of amine, the hydroxyl group on the aromatic ring promotes the epoxy-amine response.
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
Under low temperature (3 ~ 7 ℃) Mannich bases of crosslinking effect very quickly. Compared with non-modified alkylamine, the Mannich base is mixed with epoxy resin and is better for white and anti-water. In some cases, the addition of phenolic stimulants such as nonylphenols can further improve low temperature crosslinking. The choice of phenol and amine determines the performance of the film. In some cases, adding plasticizers can improve the flexibility of the coating, but this tends to reduce the chemical resistance of the paint film.
In the epoxy/amine system of rapid response, we care about the suitable coating period for coating construction.
In order to better understand this kind of crosslinking agent on the relative activity of solvent-based coating, the configuration of the varnish (viscosity reduced to GarndnerH) is in its ice/water cooled to 4.5 ℃. The starting Brookfield viscosity range is 1200-1500cp. Each system have been under 4.5 ℃, the viscosity of varnish to 2 times of the initial viscosity of 2.5 ~ 3.0 HRS.
Under the condition of 10 ℃ and RH90 % environment, and transparent film began to appear not sticky time each are not identical. In this study, the change of the hardness of paint film was better than the other crosslinking agent.
After 1 night, it is obtained without adhesion and good final hardness, but the film becomes transparent for longer because of very high humidity. For the same time, phenylalkylamine is less sticky than other types of crosslinking agents, and even after 14 days the film is soft and foggy.
Copyright: Zhang Jia Gang YaRui Chemical co.,Ltd
Diethyl toluene diamine(DETDA) http://www.yaruichem.com
Polyamide is made from the reaction of diuretic acid and polyethylamine, such as DETA or TETA. Usually at 13 ℃ temperature under construction when not using polyamide, when it's slow.
Epoxy/polyamide system if the phenolic tertiary amine such as the three - 2 minus 2 - (dimethyl amine methyl) phenol as crosslinking promoter could obtain feasible under low temperature (7 ~ 10 ℃) crosslinking rate. However, in order for the coating to have good properties (such as water resistance, corrosion resistance and chemical resistance), the amount of accelerator in the coating must be minimised. Another drawback of the epoxy/polyamide coatings with promoters is that the duration of the application is shorter.
Epoxy resins can be made from liquid epoxy resin to solid epoxy. Because the molecular weight of amine addition is increased, it is less corrosive and volatile than the unmodified matrix.
The most important thing is that amine addition is not easy to produce white, so they are especially suitable for low-temperature crosslinking coatings. However, the deficiency associated with these benefits significantly increases the viscosity of the crosslinking agent. To get a lower viscosity, amine addition is diluted with solvents or added plasticizers, such as benzylmethanol. In the case of low temperature crosslinking, an amine addition is often added as an accelerant in order for the performance of the final coat to accelerate.
Phenyl alkylamine crosslinking agent is a derivative of 3 - (p-5-8) phenol, which is the main component of cashew shell oil. Several polyfunctional phenylalkylamine, which has been developed for low temperature crosslinking, has been developed in this component. This type of crosslinking agent is usually darker and the depth of its color is related to its molecular weight. High viscosity.
This kind of crosslinking agent is a condensation compound that is produced by the chemical reactions of amine and phenol (or alkyl) and formaldehyde, which is usually called mannichbase. Although this response reduces the functional level of amine, the hydroxyl group on the aromatic ring promotes the epoxy-amine response.
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
Under low temperature (3 ~ 7 ℃) Mannich bases of crosslinking effect very quickly. Compared with non-modified alkylamine, the Mannich base is mixed with epoxy resin and is better for white and anti-water. In some cases, the addition of phenolic stimulants such as nonylphenols can further improve low temperature crosslinking. The choice of phenol and amine determines the performance of the film. In some cases, adding plasticizers can improve the flexibility of the coating, but this tends to reduce the chemical resistance of the paint film.
In the epoxy/amine system of rapid response, we care about the suitable coating period for coating construction.
In order to better understand this kind of crosslinking agent on the relative activity of solvent-based coating, the configuration of the varnish (viscosity reduced to GarndnerH) is in its ice/water cooled to 4.5 ℃. The starting Brookfield viscosity range is 1200-1500cp. Each system have been under 4.5 ℃, the viscosity of varnish to 2 times of the initial viscosity of 2.5 ~ 3.0 HRS.
Under the condition of 10 ℃ and RH90 % environment, and transparent film began to appear not sticky time each are not identical. In this study, the change of the hardness of paint film was better than the other crosslinking agent.
After 1 night, it is obtained without adhesion and good final hardness, but the film becomes transparent for longer because of very high humidity. For the same time, phenylalkylamine is less sticky than other types of crosslinking agents, and even after 14 days the film is soft and foggy.
Copyright: Zhang Jia Gang YaRui Chemical co.,Ltd
Diethyl toluene diamine(DETDA) http://www.yaruichem.com
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