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An epoxy resin coating with room temperature crosslinking agent
2017-8-18 11:18:28
An epoxy resin coating with room temperature crosslinking agent
This paper deals with the important role, application status and development trend of atmospheric crosslinking agent of epoxy resin coatings.
Because of its structure characteristic of the epoxy resin epoxy groups and hydroxyl and ether bond and excellent adhesion, insulation, corrosion and chemical character, become the most representative one of the largest high-performance anti-corrosion coating resin varieties, dosage.
The world each year about more than 40% of the epoxy resin used in the manufacture of epoxy coating, mostly used in industry field, such as Bridges, vehicles, ships, ports, mining, petroleum, chemical industry, etc. But epoxy resins can only be cross-linked with specific cross-linking agents to generate the network large molecules, which can show excellent characteristics.
As an integral part of epoxy resin coating system, the temperature crosslinking agent of epoxy coatings plays an important role. It can be said that developing a new type of epoxy resin paint with a temperature crosslinking agent is equivalent to developing a new epoxy resin or new application field. Therefore, the development of the existing crosslinking agent and the development of new crosslinking agent are the development trend of epoxy crosslinking agent.
The performance of epoxy coatings varies greatly with crosslinking agent, mainly in the following aspects:
(1) improve the mechanical properties of epoxy resin coatings.
The reaction activity of epoxy resin coating is high and the crosslinking density is large, so the coating has good corrosion resistance. But at the same time there is also a lack of physical and mechanical properties, such as poor elasticity, big issues such as brittleness, by introducing a flexible chain segment of crosslinking agent, such as with long chain fatty acid polyamide to be improved.
(2) improve the process performance of epoxy resin coatings.
The epoxy resin coating is often used on the site of large-scale construction, the toxicity of volatiles and operational problems in wet and low temperature environment. In recent years, a variety of non-toxic or low-toxicity products have been developed at home and abroad, and the modified crosslinking agent, such as modified ketogenic crosslinking agent, has excellent construction, mechanical properties and corrosion resistance.
Chinese name: Diethyl toluene diamine(DETDA)
Diethyltoluenediamine Raw material ：
TDA industrial, Sichuan production
Ethylene (Et) polymer grade, Shanghai production
TEA industrial imports
This paper deals with the important role, application status and development trend of atmospheric crosslinking agent of epoxy resin coatings.
Because of its structure characteristic of the epoxy resin epoxy groups and hydroxyl and ether bond and excellent adhesion, insulation, corrosion and chemical character, become the most representative one of the largest high-performance anti-corrosion coating resin varieties, dosage.
The world each year about more than 40% of the epoxy resin used in the manufacture of epoxy coating, mostly used in industry field, such as Bridges, vehicles, ships, ports, mining, petroleum, chemical industry, etc. But epoxy resins can only be cross-linked with specific cross-linking agents to generate the network large molecules, which can show excellent characteristics.
As an integral part of epoxy resin coating system, the temperature crosslinking agent of epoxy coatings plays an important role. It can be said that developing a new type of epoxy resin paint with a temperature crosslinking agent is equivalent to developing a new epoxy resin or new application field. Therefore, the development of the existing crosslinking agent and the development of new crosslinking agent are the development trend of epoxy crosslinking agent.
The performance of epoxy coatings varies greatly with crosslinking agent, mainly in the following aspects:
(1) improve the mechanical properties of epoxy resin coatings.
The reaction activity of epoxy resin coating is high and the crosslinking density is large, so the coating has good corrosion resistance. But at the same time there is also a lack of physical and mechanical properties, such as poor elasticity, big issues such as brittleness, by introducing a flexible chain segment of crosslinking agent, such as with long chain fatty acid polyamide to be improved.
(2) improve the process performance of epoxy resin coatings.
The epoxy resin coating is often used on the site of large-scale construction, the toxicity of volatiles and operational problems in wet and low temperature environment. In recent years, a variety of non-toxic or low-toxicity products have been developed at home and abroad, and the modified crosslinking agent, such as modified ketogenic crosslinking agent, has excellent construction, mechanical properties and corrosion resistance.
Chinese name: Diethyl toluene diamine(DETDA)
Diethyltoluenediamine Raw material ：
TDA industrial, Sichuan production
Ethylene (Et) polymer grade, Shanghai production
TEA industrial imports
A reagent grade additives
(3) improve the corrosion resistance of epoxy coatings.
The corrosion resistance of different epoxy crosslinking systems is also different. The epoxy resin of the crosslinking agent of amines has good alkali resistance and less acid resistance, and the tertiary amine structure formed after crosslinking is easy to react with acid to produce tertiary ammonium salt. However, the acid anhydride crosslinking agent crosslinked epoxy resin is the opposite, the acid is good and the alkali is bad, because the esters formed after crosslinking have an irreversible hydrolytic reaction under alkaline conditions.
(4) improve the temperature resistance of epoxy coatings.
Using aliphatic amine crosslinking agent crosslinked epoxy resin, its thermal deformation temperature is low, usually only about 70 ~ 80 ℃. Use appropriate aromatic kind of crosslinking agent, crosslinking agent, or anhydride can make the thermal deformation temperature up to 150 ℃ or so, but after the two types of crosslinking agent alone the general needs cross-linking under heating conditions.
(5) improve the dielectric properties of epoxy resin coatings.
When the epoxy resin is used for insulating coating, it can be used to improve the copolymer by using the modified copolymer, which can obviously improve the heat resistance and dielectric properties of the coatings.
For the need of site construction anticorrosion coating, epoxy resin coating generally with normal temperature crosslinking agent, the main varieties are: fatty amines, aromatic amine, alicyclic amine, polyether amine, fang fatty amine, polyamide and various kinds of modified amine etc. There are many kinds of crosslinking agent for epoxy resin coatings abroad, and its development and application level is far ahead.
The general antiseptic primer adopts modified fatty amine crosslinking agent and polyamide crosslinking agent. In the case of high solids coating or solvent-free coatings, modified aromatic amines, modified lipides and polyether amine crosslinking agents are used.
Will made mixture powder coating polyester resin, its under different conditions the coating after 1000 h after crosslinking the light rate after artificial aging test, the same time, the coating of weathering as crosslinking temperature rise and rise.
Copyright: Zhang Jia Gang YaRui Chemical co.,Ltd
(3) improve the corrosion resistance of epoxy coatings.
The corrosion resistance of different epoxy crosslinking systems is also different. The epoxy resin of the crosslinking agent of amines has good alkali resistance and less acid resistance, and the tertiary amine structure formed after crosslinking is easy to react with acid to produce tertiary ammonium salt. However, the acid anhydride crosslinking agent crosslinked epoxy resin is the opposite, the acid is good and the alkali is bad, because the esters formed after crosslinking have an irreversible hydrolytic reaction under alkaline conditions.
(4) improve the temperature resistance of epoxy coatings.
Using aliphatic amine crosslinking agent crosslinked epoxy resin, its thermal deformation temperature is low, usually only about 70 ~ 80 ℃. Use appropriate aromatic kind of crosslinking agent, crosslinking agent, or anhydride can make the thermal deformation temperature up to 150 ℃ or so, but after the two types of crosslinking agent alone the general needs cross-linking under heating conditions.
(5) improve the dielectric properties of epoxy resin coatings.
When the epoxy resin is used for insulating coating, it can be used to improve the copolymer by using the modified copolymer, which can obviously improve the heat resistance and dielectric properties of the coatings.
For the need of site construction anticorrosion coating, epoxy resin coating generally with normal temperature crosslinking agent, the main varieties are: fatty amines, aromatic amine, alicyclic amine, polyether amine, fang fatty amine, polyamide and various kinds of modified amine etc. There are many kinds of crosslinking agent for epoxy resin coatings abroad, and its development and application level is far ahead.
The general antiseptic primer adopts modified fatty amine crosslinking agent and polyamide crosslinking agent. In the case of high solids coating or solvent-free coatings, modified aromatic amines, modified lipides and polyether amine crosslinking agents are used.
Will made mixture powder coating polyester resin, its under different conditions the coating after 1000 h after crosslinking the light rate after artificial aging test, the same time, the coating of weathering as crosslinking temperature rise and rise.
Copyright: Zhang Jia Gang YaRui Chemical co.,Ltd
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