News Details
It is shown in the type coating crosslinking agent
2017-9-2 17:15:27
It is shown in the type coating crosslinking agent
The cross-linking agent of the type coating crosslinking agent is used for common use, and the type crosslinking agent can be classified into additive polymerization and catalytic type.
The so-called addition polymerization of the ring that opens the epoxy base is added to the polymerization reaction, which is shown in the three-dimensional network structure of the type crosslinking agent itself. Such crosslinking agents, such as too little addition, link the product to the epoxy base of the final reaction.
Therefore, there is a suitable dosage for this kind of crosslinking agent. While type catalytic crosslinker by cation, or anion way make epoxy open-loop addition polymerization, in the end, the crosslinking agent does not attend to the mesh structure, so there is no such as the appropriate dosage of equivalent reaction; However, increasing the dosage will speed up the crosslinking speed.
In show in the type of crosslinking agent, dicyandiamide, adipic acid hydrazide such varieties, insoluble in epoxy resin at room temperature, and dissolved at high temperature after crosslinking reaction, thus presents a latent state. Therefore, it can be called functional latent cross-linking agent.
The epoxy resin crosslinking agent is the chemical reaction with the epoxy resin, forming a network three-dimensional polymer, the composite material bone material enveloping in the network. An additive that makes the line resin tough and solid. There are many types.
Epoxy resin is an organic compound that contains two or more epoxies in the molecule, and their relative molecular weight is not high except for the individual. The molecular structure of epoxy resin is characterized by the active epoxy group in the molecular chain, which can be located at the end, middle or ring structure of the molecular chain.
Because of the active epoxy groups in the molecular structure, they can be cross-linked with multiple types of crosslinking agents to form an insoluble polymer with three - to - mesh structures.
The polymer compounds containing epoxids in the molecular structure are collectively referred to as epoxies. After cross-linked epoxy resin has good physical and chemical properties, on the surface of the metal and nonmetal material has excellent bonding strength, good dielectric properties, deformation small shrinkage rate, dimension stability, high hardness, good flexibility, the alkali solvent and most stable, and therefore is widely used in casting, impregnation, laminated materials, adhesives, coatings and other purposes.
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
The cross-linking agent of the type coating crosslinking agent is used for common use, and the type crosslinking agent can be classified into additive polymerization and catalytic type.
The so-called addition polymerization of the ring that opens the epoxy base is added to the polymerization reaction, which is shown in the three-dimensional network structure of the type crosslinking agent itself. Such crosslinking agents, such as too little addition, link the product to the epoxy base of the final reaction.
Therefore, there is a suitable dosage for this kind of crosslinking agent. While type catalytic crosslinker by cation, or anion way make epoxy open-loop addition polymerization, in the end, the crosslinking agent does not attend to the mesh structure, so there is no such as the appropriate dosage of equivalent reaction; However, increasing the dosage will speed up the crosslinking speed.
In show in the type of crosslinking agent, dicyandiamide, adipic acid hydrazide such varieties, insoluble in epoxy resin at room temperature, and dissolved at high temperature after crosslinking reaction, thus presents a latent state. Therefore, it can be called functional latent cross-linking agent.
The epoxy resin crosslinking agent is the chemical reaction with the epoxy resin, forming a network three-dimensional polymer, the composite material bone material enveloping in the network. An additive that makes the line resin tough and solid. There are many types.
Epoxy resin is an organic compound that contains two or more epoxies in the molecule, and their relative molecular weight is not high except for the individual. The molecular structure of epoxy resin is characterized by the active epoxy group in the molecular chain, which can be located at the end, middle or ring structure of the molecular chain.
Because of the active epoxy groups in the molecular structure, they can be cross-linked with multiple types of crosslinking agents to form an insoluble polymer with three - to - mesh structures.
The polymer compounds containing epoxids in the molecular structure are collectively referred to as epoxies. After cross-linked epoxy resin has good physical and chemical properties, on the surface of the metal and nonmetal material has excellent bonding strength, good dielectric properties, deformation small shrinkage rate, dimension stability, high hardness, good flexibility, the alkali solvent and most stable, and therefore is widely used in casting, impregnation, laminated materials, adhesives, coatings and other purposes.
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
The epoxy resin has secondary hydroxyl and epoxies, and secondary hydroxyl can react with isocyanate. Epoxy resin as polyol is directly added to the component of polyurethane adhesive containing hydroxyl. Only the hydroxyl participating in the reaction is used in this method.
The acid resin, carboxyl group, the epoxy ring, and the polyurethane adhesive the isocyanate reaction. In addition, epoxy resin can be dissolved in ethyl acetate, adding the phosphoric acid warming reaction, and its addition is added to polyurethane adhesive. The initial adhesion of glue; Heat resistance and hydrolysis stability can be enhanced to increase the availability of alcohols or amines to produce polyols. In addition, the presence of tertiary nitrogen in addition can accelerate NCO reaction.
Using epoxy resin as many hydroxyl component combines the advantages of polyurethane and the epoxy resin has good bonding strength and chemical resistance, make use of commonly used epoxy resin polyurethane adhesives, EP EP - 12-13, EP - 16 and EP - 20 varieties.
Epoxy resin as anti-corrosion material not only has a solid, good water resistance and leakage resistance, high strength, etc. At the same time, has the strong adhesion, normal temperature operation, convenient construction, good manufacturability, and the price is moderate. Using this kind of material of anti-corrosion engineering generally includes: FuChen resin adhesive material of FRP surface as a whole and isolation layer, paving block surface resin cement and mortar, resin cement seam jointing and filling piece of surface layer, resin thin cement or mortar made the whole surface of the single and compound and the isolation layer, glass flake resin surface and so on.
Crosslinking agent is also known as a hardener, maturation agent or variable agent, which is a kind of substance or mixture that enhances or controls the crosslinking reaction. Resin crosslinking is a process of recombination, closed loop, addition or catalysis, which makes the thermosetting resin irreversible. Crosslinking is done by adding crosslinking (crosslinking) agent.
Copyright: Zhang Jia Gang YaRui Chemical co.,Ltd
The epoxy resin has secondary hydroxyl and epoxies, and secondary hydroxyl can react with isocyanate. Epoxy resin as polyol is directly added to the component of polyurethane adhesive containing hydroxyl. Only the hydroxyl participating in the reaction is used in this method.
The acid resin, carboxyl group, the epoxy ring, and the polyurethane adhesive the isocyanate reaction. In addition, epoxy resin can be dissolved in ethyl acetate, adding the phosphoric acid warming reaction, and its addition is added to polyurethane adhesive. The initial adhesion of glue; Heat resistance and hydrolysis stability can be enhanced to increase the availability of alcohols or amines to produce polyols. In addition, the presence of tertiary nitrogen in addition can accelerate NCO reaction.
Using epoxy resin as many hydroxyl component combines the advantages of polyurethane and the epoxy resin has good bonding strength and chemical resistance, make use of commonly used epoxy resin polyurethane adhesives, EP EP - 12-13, EP - 16 and EP - 20 varieties.
Epoxy resin as anti-corrosion material not only has a solid, good water resistance and leakage resistance, high strength, etc. At the same time, has the strong adhesion, normal temperature operation, convenient construction, good manufacturability, and the price is moderate. Using this kind of material of anti-corrosion engineering generally includes: FuChen resin adhesive material of FRP surface as a whole and isolation layer, paving block surface resin cement and mortar, resin cement seam jointing and filling piece of surface layer, resin thin cement or mortar made the whole surface of the single and compound and the isolation layer, glass flake resin surface and so on.
Crosslinking agent is also known as a hardener, maturation agent or variable agent, which is a kind of substance or mixture that enhances or controls the crosslinking reaction. Resin crosslinking is a process of recombination, closed loop, addition or catalysis, which makes the thermosetting resin irreversible. Crosslinking is done by adding crosslinking (crosslinking) agent.
Copyright: Zhang Jia Gang YaRui Chemical co.,Ltd
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