News Details
Common water-based paint crosslinking agent
2017-6-16 11:58:47
Common water-based paint crosslinking agent
Epoxy resin has excellent physical and chemical properties, such as good adhesion, excellent chemical resistance and solvent resistance, high hardness, corrosion resistance and good thermal stability, therefore, has aroused people's concern.
Water-based epoxy resin can be divided into two types: water-based epoxy and water-soluble epoxy resin. The methods of preparation are mainly direct emulsification, reverse rotation and self-emulsification. In addition, there is also the use of cellulose monocrystalline nanocrystalline nanomaterials, which is a good water-based epoxy coating for flexibility and hardness.
Waterborne epoxy coatings by epoxy resin and curing agent reaction couplet membrane, the performance of the curing agent had a great influence on coating chemical properties, so the modification studies of waterborne curing agents at home and abroad has become a current research hot spot.
The currently used water-based epoxy curing agent is mainly 3 kinds of modified amine curing agent:
(1) polyamide of the 36 carbon chain dimer and polyamine;
(2) the amide polyamine, which is made from fatty acids and polyamine reactions;
(3) epoxy and polyamine are added to the product. In the synthesis of water-based epoxy curing agents, the commonly used amine mainly includes fatty polyamine, diphenylenediamine, manichine and polyoxyethylene diamine.
Because of the poor compatibility of this kind of curing agent and epoxy resin, it is the first problem to modify it.
There are three main types of modified methods commonly used:
1) reducing the levels of beramine in order to reduce the overall reactivity of the curing agent;
2) using a single epoxy or acrylonitrile seal;
Chinese name: Diethyl toluene diamine(DETDA)
Diethyltoluenediamine packing： net weight 200KG/ galvanized iron drum (a small cabinet pallet loaded 16 tons), 1000KG/IB barrels (a small cabinet loaded 18 tons or 23 tons of ISOTANK).
3) remove the unreacted free amine by the decompression distillation and add organic acids to improve water solubility. Stone runners-up et al. studied the water-based epoxy resin emulsion and curing agent ratio, ratio of antirust pigments and fillers volume concentration effect on the properties of waterborne epoxy anticorrosive coatings.
4) the results show that the optimization of the high performance of waterborne bisphenol A epoxy resin emulsion and modified amine curing agent, when the quality of the emulsion and waterborne epoxy curing agent ratio of 2:1, the coating performance is best when iron titanium powder, red iron oxide, talc powder mass ratio of the 3 to 1:1:1.5, coating properties such as mechanical performance, acid-proof alkaline, adhesion are at best; In guarantee the quality of iron titanium powder, red iron oxide, talc ratio is 1:1:1.5 under the premise of as fillers PVC volume concentration of 47.7%, the comprehensive properties such as hardness, adhesion of the coating to achieve the best.
In recent years, there has been a lot of research on the modified water-based epoxy coatings in addition to the extensive research on water-based curing agents. Such as nano SiO2, nano TiO2 nano materials used in water-borne epoxy coatings, made into aqueous nanometer modified epoxy coating, can make its adhesion, scrub resistance, weather resistance, hardness, flexibility and aging resistance performance is greatly improved.
Huang li et al., studied the performance of nano-sio2 / epoxy coatings with composite modification. First, the nano-sio2 and solvents were mixed together, and then the modified nano-sio2 was made with the addition of coupling agent and super dispersant. It then mixes the modified nano-sio2 with the e-44 epoxy resin and makes the nanosio2 / epoxy composite coating.
The results show that the dosage of modified nano SiO2 was 2%, and effective composite resin binders, can make the thermal decomposition temperature of 296 ℃, 50 ℃ higher than that of pure resin binders, paint film mechanical properties have been greatly improved.
Copyright: Zhang Jia Gang YaRui Chemical co.,Ltd
Diethyl toluene diamine(DETDA) http://www.yaruichem.com
Epoxy resin has excellent physical and chemical properties, such as good adhesion, excellent chemical resistance and solvent resistance, high hardness, corrosion resistance and good thermal stability, therefore, has aroused people's concern.
Water-based epoxy resin can be divided into two types: water-based epoxy and water-soluble epoxy resin. The methods of preparation are mainly direct emulsification, reverse rotation and self-emulsification. In addition, there is also the use of cellulose monocrystalline nanocrystalline nanomaterials, which is a good water-based epoxy coating for flexibility and hardness.
Waterborne epoxy coatings by epoxy resin and curing agent reaction couplet membrane, the performance of the curing agent had a great influence on coating chemical properties, so the modification studies of waterborne curing agents at home and abroad has become a current research hot spot.
The currently used water-based epoxy curing agent is mainly 3 kinds of modified amine curing agent:
(1) polyamide of the 36 carbon chain dimer and polyamine;
(2) the amide polyamine, which is made from fatty acids and polyamine reactions;
(3) epoxy and polyamine are added to the product. In the synthesis of water-based epoxy curing agents, the commonly used amine mainly includes fatty polyamine, diphenylenediamine, manichine and polyoxyethylene diamine.
Because of the poor compatibility of this kind of curing agent and epoxy resin, it is the first problem to modify it.
There are three main types of modified methods commonly used:
1) reducing the levels of beramine in order to reduce the overall reactivity of the curing agent;
2) using a single epoxy or acrylonitrile seal;
Chinese name: Diethyl toluene diamine(DETDA)
Diethyltoluenediamine packing： net weight 200KG/ galvanized iron drum (a small cabinet pallet loaded 16 tons), 1000KG/IB barrels (a small cabinet loaded 18 tons or 23 tons of ISOTANK).
3) remove the unreacted free amine by the decompression distillation and add organic acids to improve water solubility. Stone runners-up et al. studied the water-based epoxy resin emulsion and curing agent ratio, ratio of antirust pigments and fillers volume concentration effect on the properties of waterborne epoxy anticorrosive coatings.
4) the results show that the optimization of the high performance of waterborne bisphenol A epoxy resin emulsion and modified amine curing agent, when the quality of the emulsion and waterborne epoxy curing agent ratio of 2:1, the coating performance is best when iron titanium powder, red iron oxide, talc powder mass ratio of the 3 to 1:1:1.5, coating properties such as mechanical performance, acid-proof alkaline, adhesion are at best; In guarantee the quality of iron titanium powder, red iron oxide, talc ratio is 1:1:1.5 under the premise of as fillers PVC volume concentration of 47.7%, the comprehensive properties such as hardness, adhesion of the coating to achieve the best.
In recent years, there has been a lot of research on the modified water-based epoxy coatings in addition to the extensive research on water-based curing agents. Such as nano SiO2, nano TiO2 nano materials used in water-borne epoxy coatings, made into aqueous nanometer modified epoxy coating, can make its adhesion, scrub resistance, weather resistance, hardness, flexibility and aging resistance performance is greatly improved.
Huang li et al., studied the performance of nano-sio2 / epoxy coatings with composite modification. First, the nano-sio2 and solvents were mixed together, and then the modified nano-sio2 was made with the addition of coupling agent and super dispersant. It then mixes the modified nano-sio2 with the e-44 epoxy resin and makes the nanosio2 / epoxy composite coating.
The results show that the dosage of modified nano SiO2 was 2%, and effective composite resin binders, can make the thermal decomposition temperature of 296 ℃, 50 ℃ higher than that of pure resin binders, paint film mechanical properties have been greatly improved.
Copyright: Zhang Jia Gang YaRui Chemical co.,Ltd
Diethyl toluene diamine(DETDA) http://www.yaruichem.com
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