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Low temperature amine coating crosslinking agent
2017-9-1 12:17:16
Low temperature amine coating crosslinking agent
The traditional main products of amine crosslinking agent are polyamide (or polyamide). Modified amine adduct. In addition to meeting the requirements of drying time and crosslinking rate, it is also required to consider the resistance of the coating and the requirement of waterproofing. It reacts with the carbon dioxide and water in the air to form carbamate, which can leak into the surface of the coating and whiten.
Surface whitening (sometimes called fog or sweating) can damage the performance of the coating, as it can lead to decreased luster, increased yellowing, lower repainting, and decreased adhesion. The likelihood of white is increased with low temperature and high humidity.
In order to reduce the formation of carbamate and improve the early anti-water stain, the makers of crosslinking agents have developed various modifiers. These compounds can reduce or eliminate the production of whitening, because the hydrogen in the perimine is pre-loaded with the epoxy. The amine addition is made from an excess of bermide and epoxy resin.
Amino acid esters and epoxy resins are used to make amine admixture. Some of the most commonly used include: aliphatic amine and alicyclic amine diethyl triamine (DETA), four triethyl amine (TETA), tetraethylenepentamine (TEPA), isophorone diamine (IPDA), double - to - amino cyclohexyl methane (PACM) and 1, 2 - amino cyclohexane (1, 2 - DACH).
At 4.5 ℃ and RH80 %, each amine in low temperature crosslinking agent has its own advantages and disadvantages, according to the different application needs to choose a kind of amine crosslinking agent at low temperature.
For varnish, and transparency of paint film was eventually pale resistance performance is very important, but for paint, other properties such as the hardness of membrane and to not sticky on the performance of time may be more important.
To illustrate this, a graphic technique called "cloud volume diagrams" or "radar maps" is a valid expansion package. The axial direction of this diagram is so determined that the better one has a longer ray segment; In this way, the comprehensive performance of the paint base is the largest one of their "performance ray segments". 4.5 ℃ under the performance of these crosslinking agent by summary in figure 3.
Chinese name: Diethyl toluene diamine(DETDA)
Diethyltoluenediamine Uses:
The traditional main products of amine crosslinking agent are polyamide (or polyamide). Modified amine adduct. In addition to meeting the requirements of drying time and crosslinking rate, it is also required to consider the resistance of the coating and the requirement of waterproofing. It reacts with the carbon dioxide and water in the air to form carbamate, which can leak into the surface of the coating and whiten.
Surface whitening (sometimes called fog or sweating) can damage the performance of the coating, as it can lead to decreased luster, increased yellowing, lower repainting, and decreased adhesion. The likelihood of white is increased with low temperature and high humidity.
In order to reduce the formation of carbamate and improve the early anti-water stain, the makers of crosslinking agents have developed various modifiers. These compounds can reduce or eliminate the production of whitening, because the hydrogen in the perimine is pre-loaded with the epoxy. The amine addition is made from an excess of bermide and epoxy resin.
Amino acid esters and epoxy resins are used to make amine admixture. Some of the most commonly used include: aliphatic amine and alicyclic amine diethyl triamine (DETA), four triethyl amine (TETA), tetraethylenepentamine (TEPA), isophorone diamine (IPDA), double - to - amino cyclohexyl methane (PACM) and 1, 2 - amino cyclohexane (1, 2 - DACH).
At 4.5 ℃ and RH80 %, each amine in low temperature crosslinking agent has its own advantages and disadvantages, according to the different application needs to choose a kind of amine crosslinking agent at low temperature.
For varnish, and transparency of paint film was eventually pale resistance performance is very important, but for paint, other properties such as the hardness of membrane and to not sticky on the performance of time may be more important.
To illustrate this, a graphic technique called "cloud volume diagrams" or "radar maps" is a valid expansion package. The axial direction of this diagram is so determined that the better one has a longer ray segment; In this way, the comprehensive performance of the paint base is the largest one of their "performance ray segments". 4.5 ℃ under the performance of these crosslinking agent by summary in figure 3.
Chinese name: Diethyl toluene diamine(DETDA)
Diethyltoluenediamine Uses:
The product is identical to Ethancure 100 and Lonza DETDA 80, DETDA is very effective polyurethane elastomer chain extender; also be used as polyurethane and epoxy resin curing agent, epoxy resin of an antioxidant, industrial oils and lubricants . In addition, also as intermediates in organic synthesis.Especially for the RIM (reaction injection molding), is important in the field of spray polyurea chain extender species. Also can be used for casting polyurethane elastomer (CPU) and a curing agent, epoxy curing agent, epoxy resin of antioxidants, lubricants and industrial oils other antioxidants.
DSC technology used in this study is a powerful tool to evaluate the reaction degree of low temperature crosslinking coatings. Under 4.5 ℃ with the study of each crosslinker crosslinked liquid epoxy resin were better crosslinking performance (strong) reactivity. In order to illustrate this fact, the low temperature reaction activity of these crosslinking agents is compared with that of polyamide. With similar DSC technique under 4.5 ℃ for three kinds of polyamide crosslinking agent (gal promoter and without accelerator) crosslinking rate were determined.
Results show that the reaction of polyamide degree for 33-43% in the third days, even degree of crosslinking reaction to 14 days only 55-65%, and compared with low temperature crosslinking agent (see figure 2), the reaction degree in three days is 65-75%, 14 days is 75-95%.
This study will be crosslinking agent 2 compared with the other crosslinking agent, under 4.5 ℃, it in the first four days of crosslinking rate is lowest, but after 14 days, it finally reached the highest rate of reaction.
The reaction of these new crosslinking agents is stronger than that of polyamide, which is most obvious at the initial stage of crosslinking, which is crucial for the development of coating properties. For this reason, for low temperature crosslinking, we expect a greater improvement in the resistance to water spots and early chemical resistance.
The cross-linking agent used in this study has excellent low temperature reactivity, while other performance tests indicate that each crosslinking agent has its most suitable specific purpose. Crosslinking agent 1 is suitable for waste water treatment and solvent-free Marine coatings, because it has excellent water resistance and corrosion resistance.
Cross-linking agent 2 is applicable to the VOC allowable range of 2.8 LBS/galen industrial protective coatings, Marine coatings and solvent - resistant tank lining. The crosslinking agent 3 has high reaction activity and excellent chemical resistance, which can be used as a co-crosslinking agent for tank liner, synthetic floor and as polyamide coatings.
Copyright: Zhang Jia Gang YaRui Chemical co.,Ltd
DSC technology used in this study is a powerful tool to evaluate the reaction degree of low temperature crosslinking coatings. Under 4.5 ℃ with the study of each crosslinker crosslinked liquid epoxy resin were better crosslinking performance (strong) reactivity. In order to illustrate this fact, the low temperature reaction activity of these crosslinking agents is compared with that of polyamide. With similar DSC technique under 4.5 ℃ for three kinds of polyamide crosslinking agent (gal promoter and without accelerator) crosslinking rate were determined.
Results show that the reaction of polyamide degree for 33-43% in the third days, even degree of crosslinking reaction to 14 days only 55-65%, and compared with low temperature crosslinking agent (see figure 2), the reaction degree in three days is 65-75%, 14 days is 75-95%.
This study will be crosslinking agent 2 compared with the other crosslinking agent, under 4.5 ℃, it in the first four days of crosslinking rate is lowest, but after 14 days, it finally reached the highest rate of reaction.
The reaction of these new crosslinking agents is stronger than that of polyamide, which is most obvious at the initial stage of crosslinking, which is crucial for the development of coating properties. For this reason, for low temperature crosslinking, we expect a greater improvement in the resistance to water spots and early chemical resistance.
The cross-linking agent used in this study has excellent low temperature reactivity, while other performance tests indicate that each crosslinking agent has its most suitable specific purpose. Crosslinking agent 1 is suitable for waste water treatment and solvent-free Marine coatings, because it has excellent water resistance and corrosion resistance.
Cross-linking agent 2 is applicable to the VOC allowable range of 2.8 LBS/galen industrial protective coatings, Marine coatings and solvent - resistant tank lining. The crosslinking agent 3 has high reaction activity and excellent chemical resistance, which can be used as a co-crosslinking agent for tank liner, synthetic floor and as polyamide coatings.
Copyright: Zhang Jia Gang YaRui Chemical co.,Ltd
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