News Details
Epoxy silane low-polymer crosslinking agent
2017-6-8 23:14:36
Epoxy silane low-polymer crosslinking agent
Epoxy silane oligomer (ESO) is a control after the epoxy silane hydrolysis and condensation reaction synthesis product, in these reactions, alkoxy content is maintained at a certain level, retention of the reactive epoxy group. These epoxies are hydrolyzed in a low polymerization, but this side reaction is very small, producing only a small amount of diol in the low polymer.
Because of the existence of silane and organic functional groups, still have a reactive oligomers: 1) by silane part and base material, other silane and siloxane oligomers in coupling; 2) the polymer functional groups are grafted through epoxy.
As a part of silane condensates into a low-polymer form, the content of the alkanes in the material decreases, thereby reducing the reduction of VOC in the whole formula. In addition, silane low polymers are 100% active, so there is no need to add solvents. Compared with monomer silane, low polysilane can not be hydrolyzed, and can be hydrolyzed under certain controlled conditions.
As A representative of ESO technology products, with conventional single silane as gamma glycidyl ether base propyl silane three oxygen radicals (Silquest * A - 187 silane) and gamma - propyl glycidyl ether oxygen triethoxy silane (Silquest * A - 1871 silane) compared to the part of the performance of such as the product has many advantages of oligomeric silane structure. The amount of ethanol released by CoatOSil * MP for 200 hydrolysis is low, so VOC is also low.
In practical applications, siloxane, which contains the active constituent of the same amount, emits very small amounts of ethanol. The calculation results show that if using 75% CoatOSil * MP replacing parts of the gamma - 200 silane glycidyl ether base propyl silane three oxygen radicals (Silquest * A - 187 silane), release the VOC was only about 22% of its weight.
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.
Therefore, the final VOC released by CoatOSil * MP after hydrolysis is 60% less than the monomer epoxy silane. The same comparison is made with Silquest * a-1871 silane, which releases more than 75 percent less. In practical applications, ESO releases less VOC because of the lower amount of added content in the recipe.
Another important feature of CoatOSil * MP 200 silane is that epoxies are higher. The higher the density of the epoxy, the more efficient the potential cross-linking reaction, the greater the ESO density in the process of the coupling of the carboxyl, hydroxyl, and amino-functional groups. This feature speeds up the solidification rate.
The characteristics of the CoatOSil * MP 200 silane using 29Si NMR showed the degree of condensation of ESO silanol. Different types of relative content such as SiOH, SiOR, and SiOSi are represented by T0, T1, T2, and T3. These four symbols each represent a special SiO key in the low polysilane.
The key Tx, which stands for trialkyl silane, corresponds to the number of SiOSi keys in each silicon alkyl, where x is the number of keys for SiOSi. As a result, the trialkyl silane or trisilanol, which does not contain the SiOSi key, is usually represented by T0.
T3 indicates that a silane and other silane reactions produce three SiOSi keys. As shown in figure 4, the 29Si NMR reaction spectra of the CoatOSil * MP 200 silane differ. The CoatOSil * MP 200 reaction matrix also produces a large amount of alkane and silica, which are expressed in relative terms at T1 and T2.
ESO can be applied to many of the same applications as monomer epoxy silane. ESO is an application of acrylic emulsion crosslinking agent and metal particle surface modifier.
Copyright: Zhang Jia Gang YaRui Chemical co.,Ltd
Diethyl toluene diamine(DETDA) http://www.yaruichem.com
Epoxy silane oligomer (ESO) is a control after the epoxy silane hydrolysis and condensation reaction synthesis product, in these reactions, alkoxy content is maintained at a certain level, retention of the reactive epoxy group. These epoxies are hydrolyzed in a low polymerization, but this side reaction is very small, producing only a small amount of diol in the low polymer.
Because of the existence of silane and organic functional groups, still have a reactive oligomers: 1) by silane part and base material, other silane and siloxane oligomers in coupling; 2) the polymer functional groups are grafted through epoxy.
As a part of silane condensates into a low-polymer form, the content of the alkanes in the material decreases, thereby reducing the reduction of VOC in the whole formula. In addition, silane low polymers are 100% active, so there is no need to add solvents. Compared with monomer silane, low polysilane can not be hydrolyzed, and can be hydrolyzed under certain controlled conditions.
As A representative of ESO technology products, with conventional single silane as gamma glycidyl ether base propyl silane three oxygen radicals (Silquest * A - 187 silane) and gamma - propyl glycidyl ether oxygen triethoxy silane (Silquest * A - 1871 silane) compared to the part of the performance of such as the product has many advantages of oligomeric silane structure. The amount of ethanol released by CoatOSil * MP for 200 hydrolysis is low, so VOC is also low.
In practical applications, siloxane, which contains the active constituent of the same amount, emits very small amounts of ethanol. The calculation results show that if using 75% CoatOSil * MP replacing parts of the gamma - 200 silane glycidyl ether base propyl silane three oxygen radicals (Silquest * A - 187 silane), release the VOC was only about 22% of its weight.
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.
Therefore, the final VOC released by CoatOSil * MP after hydrolysis is 60% less than the monomer epoxy silane. The same comparison is made with Silquest * a-1871 silane, which releases more than 75 percent less. In practical applications, ESO releases less VOC because of the lower amount of added content in the recipe.
Another important feature of CoatOSil * MP 200 silane is that epoxies are higher. The higher the density of the epoxy, the more efficient the potential cross-linking reaction, the greater the ESO density in the process of the coupling of the carboxyl, hydroxyl, and amino-functional groups. This feature speeds up the solidification rate.
The characteristics of the CoatOSil * MP 200 silane using 29Si NMR showed the degree of condensation of ESO silanol. Different types of relative content such as SiOH, SiOR, and SiOSi are represented by T0, T1, T2, and T3. These four symbols each represent a special SiO key in the low polysilane.
The key Tx, which stands for trialkyl silane, corresponds to the number of SiOSi keys in each silicon alkyl, where x is the number of keys for SiOSi. As a result, the trialkyl silane or trisilanol, which does not contain the SiOSi key, is usually represented by T0.
T3 indicates that a silane and other silane reactions produce three SiOSi keys. As shown in figure 4, the 29Si NMR reaction spectra of the CoatOSil * MP 200 silane differ. The CoatOSil * MP 200 reaction matrix also produces a large amount of alkane and silica, which are expressed in relative terms at T1 and T2.
ESO can be applied to many of the same applications as monomer epoxy silane. ESO is an application of acrylic emulsion crosslinking agent and metal particle surface modifier.
Copyright: Zhang Jia Gang YaRui Chemical co.,Ltd
Diethyl toluene diamine(DETDA) http://www.yaruichem.com
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