News Details
Modification of the crosslinking agent of amine coatings
2017-8-23 11:18:28
Modification of the crosslinking agent of amine coatings
In order to reduce the toxicity of the crosslinking agent of amines, to overcome the defects and expand the application field, the physical and chemical properties should be improved. Adjust crosslinking reaction speed, viscosity, wettability, compatibility, liquid and other quality standards. Various chemical methods and physical methods can be used to modify the amines crosslinking agent.
Amines crosslinking agent modified with low volatility, small irritant, small toxicity; The solubility of epoxy resin is good, so the speed is moderate. The application of crosslinking agent was expanded by the modification of the crosslinking agent.
Many epoxy resin manufacturer in China and crosslinking agent professional manufacturer in strengthening the old brand crosslinking agent production at the same time, in 70-80 - s of the 20th century began to intensify scientific research to improve the technology content of crosslinking agent, to adapt to the electronic, electrical, electrical, mechanical, chemical, corrosion protection and the development of environmental protection requirements, have developed dozens of modified amine crosslinking agent.
Modification have in common is using amine compounds of active hydrogen (NH2) or connected to the group activity or modification to the addition or condensation reaction, in order to get modified amine products, will now several modified methods and some corresponding brand crosslinking agent is briefly as follows.
1. Epoxy base addition reaction.
The modification of polyamide crosslinking agent - polyamide crosslinking agent
The commonly used amine is diamine, diethylene triamine, triethylene tetramine, isophenylenediamine, phthalate, MXDA, diphenyldiphenylmethane (DDM). The commonly used secondary amines are imidazole and 2-methylimidazole; The commonly used epoxide is ethylene oxide. Epoxy propane, epichlorohydrin, glycidyl ether and epoxy resin. Such modification methods occupy a very important position in modified amines. Here are the different ingredients for the addition of the ingredients.
(1) addition of glycidyl ether and amine compounds. The cross-linking agent of n-butyl glycidyl ether and diethylenediamine was added. The crosslinking agent with 1, 3 - diamino-cyclohexane has excellent adhesion and elongation.
Phenyl glycidyl ether, hexyl or isooctyl glycidyl ether with ethanolamine, diethanolamine reaction can get the modified products of low price, good performance, can be widely used in general adhesive, anticorrosion, glass fiber reinforced plastic production, etc.
Butyl glycidyl ether and diamino diphenyl methane modified crosslinking reaction type EP - 4000 (AD) of epoxy resin by crosslinking material has high strength, high heat deformation temperature (125 ℃).
Flame retardant crosslinking agent of tribromphenyl glycidyl ether or bromocresol glycidyl ether and lower fatty amine, such as diethylenediamine. Its bromine content is greater than 25%, and it has certain flame retardancy after it has been cross-linked with epoxy resin.
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
In order to reduce the toxicity of the crosslinking agent of amines, to overcome the defects and expand the application field, the physical and chemical properties should be improved. Adjust crosslinking reaction speed, viscosity, wettability, compatibility, liquid and other quality standards. Various chemical methods and physical methods can be used to modify the amines crosslinking agent.
Amines crosslinking agent modified with low volatility, small irritant, small toxicity; The solubility of epoxy resin is good, so the speed is moderate. The application of crosslinking agent was expanded by the modification of the crosslinking agent.
Many epoxy resin manufacturer in China and crosslinking agent professional manufacturer in strengthening the old brand crosslinking agent production at the same time, in 70-80 - s of the 20th century began to intensify scientific research to improve the technology content of crosslinking agent, to adapt to the electronic, electrical, electrical, mechanical, chemical, corrosion protection and the development of environmental protection requirements, have developed dozens of modified amine crosslinking agent.
Modification have in common is using amine compounds of active hydrogen (NH2) or connected to the group activity or modification to the addition or condensation reaction, in order to get modified amine products, will now several modified methods and some corresponding brand crosslinking agent is briefly as follows.
1. Epoxy base addition reaction.
The modification of polyamide crosslinking agent - polyamide crosslinking agent
The commonly used amine is diamine, diethylene triamine, triethylene tetramine, isophenylenediamine, phthalate, MXDA, diphenyldiphenylmethane (DDM). The commonly used secondary amines are imidazole and 2-methylimidazole; The commonly used epoxide is ethylene oxide. Epoxy propane, epichlorohydrin, glycidyl ether and epoxy resin. Such modification methods occupy a very important position in modified amines. Here are the different ingredients for the addition of the ingredients.
(1) addition of glycidyl ether and amine compounds. The cross-linking agent of n-butyl glycidyl ether and diethylenediamine was added. The crosslinking agent with 1, 3 - diamino-cyclohexane has excellent adhesion and elongation.
Phenyl glycidyl ether, hexyl or isooctyl glycidyl ether with ethanolamine, diethanolamine reaction can get the modified products of low price, good performance, can be widely used in general adhesive, anticorrosion, glass fiber reinforced plastic production, etc.
Butyl glycidyl ether and diamino diphenyl methane modified crosslinking reaction type EP - 4000 (AD) of epoxy resin by crosslinking material has high strength, high heat deformation temperature (125 ℃).
Flame retardant crosslinking agent of tribromphenyl glycidyl ether or bromocresol glycidyl ether and lower fatty amine, such as diethylenediamine. Its bromine content is greater than 25%, and it has certain flame retardancy after it has been cross-linked with epoxy resin.
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 isooctyl diglycidyl ether was obtained by 2-methyl imidazole and butyl glycidyl ether, and the cross-linking agent was 704 and 705. Traditional production method of product appearance for brown viscous liquid, the appearance is not ideal, adopting water ethanol as solvent reaction product is red brown viscous liquid, the appearance is more suitable for use as crosslinking agent.
It is worth noting that the above modified case due to the highly active type amine, add glycidyl ether should be adopted to control the reaction to avoid exothermic drama, bumping, flow, and the product colour and lustre is shallow, also should pay attention to shrink oil ether epoxy groups by the single, otherwise difficult to control reaction, chain reaction, increasing product viscosity is great.
(2) the addition reaction of epoxy resin and amine. The epoxy resin-amine adduct USES epoxy resin and an excessive amount of ethylenediamine (or hexamethylenediamine, diethylene triamine, etc.) to heat the reflux reaction and remove excess amine. It is divided into liquid (aqueous) and solid.
(3) reaction of epichlorohydrin and amine. For example, there is a reaction between phthalamethylamine and epichlorohydrin, and after removing HCL, it is linked to a chain polyamide.
In the formula, n = 1-3 this kind of crosslinking agent has the drug resistance, adhesion, amines, and epoxy resin crosslinking agent with high flexibility and high adhesion stripping strength.
In the formula, n1 = 2-4, n2 = 1-3. This crosslinking agent can be underwater, with water, with rust crosslinking, mainly used as anticorrosive paint, and the coated film has good flexibility, impact toughness, solvent resistance and corrosion resistance.
Copyright: Zhang Jia Gang YaRui Chemical co.,Ltd
The isooctyl diglycidyl ether was obtained by 2-methyl imidazole and butyl glycidyl ether, and the cross-linking agent was 704 and 705. Traditional production method of product appearance for brown viscous liquid, the appearance is not ideal, adopting water ethanol as solvent reaction product is red brown viscous liquid, the appearance is more suitable for use as crosslinking agent.
It is worth noting that the above modified case due to the highly active type amine, add glycidyl ether should be adopted to control the reaction to avoid exothermic drama, bumping, flow, and the product colour and lustre is shallow, also should pay attention to shrink oil ether epoxy groups by the single, otherwise difficult to control reaction, chain reaction, increasing product viscosity is great.
(2) the addition reaction of epoxy resin and amine. The epoxy resin-amine adduct USES epoxy resin and an excessive amount of ethylenediamine (or hexamethylenediamine, diethylene triamine, etc.) to heat the reflux reaction and remove excess amine. It is divided into liquid (aqueous) and solid.
(3) reaction of epichlorohydrin and amine. For example, there is a reaction between phthalamethylamine and epichlorohydrin, and after removing HCL, it is linked to a chain polyamide.
In the formula, n = 1-3 this kind of crosslinking agent has the drug resistance, adhesion, amines, and epoxy resin crosslinking agent with high flexibility and high adhesion stripping strength.
In the formula, n1 = 2-4, n2 = 1-3. This crosslinking agent can be underwater, with water, with rust crosslinking, mainly used as anticorrosive paint, and the coated film has good flexibility, impact toughness, solvent resistance and corrosion resistance.
Copyright: Zhang Jia Gang YaRui Chemical co.,Ltd
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