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The coating is silane crosslinking agent
2017-6-7 11:46:37
The coating is silane crosslinking agent
In the ideal case, the surface is pretreated with silane hydrolysate, then the surface is dried or solidified at high temperature. For particulate matter, sheet, powdery material and so on, these substances can be formed directly dissolved in silane hydrolyzate pulp or paste or directly to the silane hydrolyzate spraying layer formed in the material surface treatment. However, in the absence of pretreatment, silane can be added to the final coating.
Usually silane additives are applied as monomer in coatings, which is to say, these additives are formulated in accordance with the recipe described in the previous section.
However, monomer silane has certain limitations. The treatment of silane in solvent formulations is complex, and is more complex in the water formula, because silane is so susceptible to hydrolysis and condensation.
The key to the use of silicone is the dual nature of silane molecules. Organic functional groups have a standard organic coupling reaction at one end, whereas trialoxo is hydrolyzed and condensation. These two processes can be controlled by different rate of reaction and affect the overall performance of the additive.
So, monomer silane can cause the coating to solidify at a slower rate, making it longer, especially at room temperature. This is more prominent when monomer silane is connected to a single organic functional group per unit of graft or coupling. The organic reaction is only part of the process of the crosslinking reaction, which is more dependent on the siloxane crosslinking and can effectively transfer the required physical properties.
The proportion of volatile organic compounds (VOC), which is typically found in monomer silane, is very high. For example, gamma ammonia propyl triethoxy silane release of its weight of 62.5% ethanol, gamma glycidyl ether base silicon propyl three oxygen radicals release accounted for 40.7% of its weight of methanol. The VOC produced by these two silane accounts for between 0.1 and 15% of the total.
The new environmental regulations further restrict the amount of VOC allowed in the paint formula, and the proportion of the total amount of VOC in the final formula should be carefully examined.
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
We aim to develop a product that can penetrate the above limitations and design and synthesize a silane low polymer. Low poly structure can solve some problems of the silane reaction, because before the formula or curing to form a network of small siloxane, such coupling between polymer and organic functional groups become the main reaction of compounds.
Since the organic functional group was initially linked in the reaction, the silicone reaction was reduced over time. In addition, the low polysilane contains a large number of organic functional groups per unit, which greatly improves the efficiency of crosslinking reactions. The VOC and HAP also declined in large quantities due to the use of the SiOSi key and the SiOH key before blending and curing.
The low polysilane was designed to be used in water, solvability and solvent-free systems. So there's no solvent in this product. Another typical advantage of solvent-free structures is that the flash point is higher, which is less problematic in handling and storage, and more suitable for industrial applications.
Silane low polymer is a low molecular weight polymer, which is produced by the condensation of silane after hydrolysis of silica-silicon and two continuous reactions (see figure 2). Silane monomer in the process of synthesis of the oligomer the fundamental problem is how to react to the two under effective control so that the silane oligomer molecular weight can be controlled.
There are many ways to solve this problem, and controlled hydrolysis and condensation reactions can be used to make low-polysiloxane products. Because epoxy materials are very common in the coating industry.
Copyright: Zhang Jia Gang YaRui Chemical co.,Ltd
Diethyl toluene diamine(DETDA) http://www.yaruichem.com
In the ideal case, the surface is pretreated with silane hydrolysate, then the surface is dried or solidified at high temperature. For particulate matter, sheet, powdery material and so on, these substances can be formed directly dissolved in silane hydrolyzate pulp or paste or directly to the silane hydrolyzate spraying layer formed in the material surface treatment. However, in the absence of pretreatment, silane can be added to the final coating.
Usually silane additives are applied as monomer in coatings, which is to say, these additives are formulated in accordance with the recipe described in the previous section.
However, monomer silane has certain limitations. The treatment of silane in solvent formulations is complex, and is more complex in the water formula, because silane is so susceptible to hydrolysis and condensation.
The key to the use of silicone is the dual nature of silane molecules. Organic functional groups have a standard organic coupling reaction at one end, whereas trialoxo is hydrolyzed and condensation. These two processes can be controlled by different rate of reaction and affect the overall performance of the additive.
So, monomer silane can cause the coating to solidify at a slower rate, making it longer, especially at room temperature. This is more prominent when monomer silane is connected to a single organic functional group per unit of graft or coupling. The organic reaction is only part of the process of the crosslinking reaction, which is more dependent on the siloxane crosslinking and can effectively transfer the required physical properties.
The proportion of volatile organic compounds (VOC), which is typically found in monomer silane, is very high. For example, gamma ammonia propyl triethoxy silane release of its weight of 62.5% ethanol, gamma glycidyl ether base silicon propyl three oxygen radicals release accounted for 40.7% of its weight of methanol. The VOC produced by these two silane accounts for between 0.1 and 15% of the total.
The new environmental regulations further restrict the amount of VOC allowed in the paint formula, and the proportion of the total amount of VOC in the final formula should be carefully examined.
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
We aim to develop a product that can penetrate the above limitations and design and synthesize a silane low polymer. Low poly structure can solve some problems of the silane reaction, because before the formula or curing to form a network of small siloxane, such coupling between polymer and organic functional groups become the main reaction of compounds.
Since the organic functional group was initially linked in the reaction, the silicone reaction was reduced over time. In addition, the low polysilane contains a large number of organic functional groups per unit, which greatly improves the efficiency of crosslinking reactions. The VOC and HAP also declined in large quantities due to the use of the SiOSi key and the SiOH key before blending and curing.
The low polysilane was designed to be used in water, solvability and solvent-free systems. So there's no solvent in this product. Another typical advantage of solvent-free structures is that the flash point is higher, which is less problematic in handling and storage, and more suitable for industrial applications.
Silane low polymer is a low molecular weight polymer, which is produced by the condensation of silane after hydrolysis of silica-silicon and two continuous reactions (see figure 2). Silane monomer in the process of synthesis of the oligomer the fundamental problem is how to react to the two under effective control so that the silane oligomer molecular weight can be controlled.
There are many ways to solve this problem, and controlled hydrolysis and condensation reactions can be used to make low-polysiloxane products. Because epoxy materials are very common in the coating industry.
Copyright: Zhang Jia Gang YaRui Chemical co.,Ltd
Diethyl toluene diamine(DETDA) http://www.yaruichem.com
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