News Details
Crosslinking agent crosslinking epoxy coating
2017-4-28 22:47:25
Crosslinking agent crosslinking epoxy coating,According to the principle of crosslinking agent cross-linked epoxy resin, can be divided into the reaction with the epoxy groups of epoxy resin crosslinking of crosslinking agent, reaction with epoxy group of crosslinking agent and reaction with hydroxyl of the epoxy resin crosslinking agent of three categories.
The last category is mainly resin that can react with epoxy resins, such as phenolic resin containing hydroxymethyl or alkylox. Melamine resin and isocyanate.
In amine crosslinking agent, alicyclic amine and its bonus for shallow, good flow property, high gloss, not white, without induction period, but the glass transition temperature is higher, poor flexibility, mainly used as crosslinking agent of solventless epoxy floor coating, use fashion needs to join thiokol, long chain alkyl glycidyl ether and elastic polyurethane flexibilizer toughening processing.
The selection of solvent in addition to should be in accordance with the principle of solvent coating selection of solvent (such as volatile speed, toxicity, cost), should also pay special attention to the solvent on the solubility of epoxy resin, epoxy resin coating should be adopted by the mixed solvent composed of solvent and thinner. Using mixed solvents can reduce cost, improve coating performance and construction performance, and improve solvent solution.
High molecular weight of epoxy resin should use ketone alcohol and ether solvents, molecular weight of epoxy resin can be used in a mixture of aromatic hydrocarbon and alcohol solvent, low molecular weight epoxy resin can be dissolved Yu Fang hydrocarbon solvents, but in order to improve the solvency, multi-purpose aromatic hydrocarbon and alcohol mixed solvent.
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
For self-leveling floor coating, suitable for the use of slow-moving mellow solvent, it can improve the level of fluidity. When the epoxy coating is configured, do not use ester and ketone solvents because the ester and ketone solvents react with the amines and reduce the crosslinking effect.
In solvent-free self-leveling epoxy floor coating, need to take the appropriate measures to reduce the viscosity of coating, otherwise difficult to achieve or self-leveling coatings construction effect, using reactive diluent is an effective method.
With ordinary concept composed of solvent, diluent, thinner, while Mars is also very low viscosity liquid, can reduce the viscosity of coating and a dilution effect, but the composition of active diluents containing active epoxy functional groups, can react with amine crosslinking agent, become rather like solvent coating components become volatile.
Consequently, in epoxy floor coating wear-resisting, reactive diluent right amount to join, both to reduce the viscosity of coating, and doesn't increase coating volatile organic content.
According to the molecular structure of reactive diluent can be divided into single epoxy reactive diluent, and the epoxy reactive diluent, the former such as single butyl glycidyl ether epoxy and C12 ~ C14, alkyl glycidyl ether; The latter, such as diepoxy 1, 4-butanediol, etc.
Self-leveling epoxy floor coating is commonly used in the C12 ~ C14, glycidyl ether, acrylate and so on.
This kind of reactive diluent has small surface tension, and it is so smooth that it can make the coating have a high gloss and produce a good mirror effect. The active thinners commonly used in China are dibutyl glycidyl ether.
In addition, some active diluents can also be used to strengthen the coating. Some active diluents have some effect on the heat resistance and corrosion resistance of epoxy coating. At the same time, the dosage of the same active diluent can have a significant effect on the viscosity of epoxy resin.
Copyright: Zhang Jia Gang YaRui Chemical co.,Ltd
Diethyl toluene diamine(DETDA) http://www.yaruichem.com
The last category is mainly resin that can react with epoxy resins, such as phenolic resin containing hydroxymethyl or alkylox. Melamine resin and isocyanate.
In amine crosslinking agent, alicyclic amine and its bonus for shallow, good flow property, high gloss, not white, without induction period, but the glass transition temperature is higher, poor flexibility, mainly used as crosslinking agent of solventless epoxy floor coating, use fashion needs to join thiokol, long chain alkyl glycidyl ether and elastic polyurethane flexibilizer toughening processing.
The selection of solvent in addition to should be in accordance with the principle of solvent coating selection of solvent (such as volatile speed, toxicity, cost), should also pay special attention to the solvent on the solubility of epoxy resin, epoxy resin coating should be adopted by the mixed solvent composed of solvent and thinner. Using mixed solvents can reduce cost, improve coating performance and construction performance, and improve solvent solution.
High molecular weight of epoxy resin should use ketone alcohol and ether solvents, molecular weight of epoxy resin can be used in a mixture of aromatic hydrocarbon and alcohol solvent, low molecular weight epoxy resin can be dissolved Yu Fang hydrocarbon solvents, but in order to improve the solvency, multi-purpose aromatic hydrocarbon and alcohol mixed solvent.
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
For self-leveling floor coating, suitable for the use of slow-moving mellow solvent, it can improve the level of fluidity. When the epoxy coating is configured, do not use ester and ketone solvents because the ester and ketone solvents react with the amines and reduce the crosslinking effect.
In solvent-free self-leveling epoxy floor coating, need to take the appropriate measures to reduce the viscosity of coating, otherwise difficult to achieve or self-leveling coatings construction effect, using reactive diluent is an effective method.
With ordinary concept composed of solvent, diluent, thinner, while Mars is also very low viscosity liquid, can reduce the viscosity of coating and a dilution effect, but the composition of active diluents containing active epoxy functional groups, can react with amine crosslinking agent, become rather like solvent coating components become volatile.
Consequently, in epoxy floor coating wear-resisting, reactive diluent right amount to join, both to reduce the viscosity of coating, and doesn't increase coating volatile organic content.
According to the molecular structure of reactive diluent can be divided into single epoxy reactive diluent, and the epoxy reactive diluent, the former such as single butyl glycidyl ether epoxy and C12 ~ C14, alkyl glycidyl ether; The latter, such as diepoxy 1, 4-butanediol, etc.
Self-leveling epoxy floor coating is commonly used in the C12 ~ C14, glycidyl ether, acrylate and so on.
This kind of reactive diluent has small surface tension, and it is so smooth that it can make the coating have a high gloss and produce a good mirror effect. The active thinners commonly used in China are dibutyl glycidyl ether.
In addition, some active diluents can also be used to strengthen the coating. Some active diluents have some effect on the heat resistance and corrosion resistance of epoxy coating. At the same time, the dosage of the same active diluent can have a significant effect on the viscosity of epoxy resin.
Copyright: Zhang Jia Gang YaRui Chemical co.,Ltd
Diethyl toluene diamine(DETDA) http://www.yaruichem.com
Spanish
French
Italian
Portuguese
Japanese
Korean
Arabic
Russian