News Details
New cashew phenol modified polyamide coatings crosslinking agent
2017-7-25 16:02:11
New cashew phenol modified polyamide coatings crosslinking agent
The present situation of crosslinking agent for epoxy resin coating was analyzed and its existing problems were pointed out. On this basis, developed a new type of cashew phenol modified polyamide crosslinking agent, so as to solve the low temperature cannot crosslinking and polyamide resin modified amine resin such as poor flexibility, easy yellowing problem, is a kind of excellent anticorrosive performance, to the four seasons temperature crosslinking of high-performance epoxy crosslinking agent.
The epoxy resin crosslinking agent has been widely used in the corrosion prevention of steel structure due to its excellent adhesion strength and corrosion resistance. However, the products of normal temperature crosslinking film are the key points in the application, so as to make the development of epoxy resin with normal temperature crosslinking agent more and more rapidly, and the product variety is more and more.
At present commonly used normal temperature cross-linking agent mainly amine and modified amine products, due to its small molecular amine volatile, strong toxicity, limited in use, now mostly not used independently as a crosslinking agent at room temperature. The main current temperature crosslinking agent is the modified amine products, and the typical products are polyamide, mannil, phenolic amine and so on.
Representative products of polyamide are 300, 650, 651, Versamid115, Ancamide2050, etc; The representative products of mannesine are T31 and T33; The representative product of phenolic amine is cashew phenol modified amine. These products are the most representative products of domestic epoxy resin at present, and have different performance characteristics and have been widely used in different fields.
The characteristics of the crosslinking agent of epoxy resins are of several kinds of crosslinking agents. Although they are both normal temperature crosslinking agents, they have different characteristics and have different application fields. The main characteristics are as follows. Polyamide crosslinking agent can be interlinked with epoxy resin. The film has good corrosion resistance and flexibility after crosslinking.
But the drying time is long, the biggest drawback is the low temperature crosslinking performance is poorer, under normal circumstances, the temperature is below 10 ℃ can't carry on normal construction, which limits its use in the winter. Has nice alkali and epoxy resin can be got behind in film at room temperature, the low temperature crosslinking temperature is lower than polyamide resin, basic construction can be above 0 ℃. The best advantage is that it can be closed after the crosslinking, good oil resistance and chemical resistance.
Chinese name: Diethyl toluene diamine(DETDA)
Diethyltoluenediamine Raw material ：
TDA industrial, Sichuan production
Ethylene (Et) polymer grade, Shanghai production
TEA industrial imports
The present situation of crosslinking agent for epoxy resin coating was analyzed and its existing problems were pointed out. On this basis, developed a new type of cashew phenol modified polyamide crosslinking agent, so as to solve the low temperature cannot crosslinking and polyamide resin modified amine resin such as poor flexibility, easy yellowing problem, is a kind of excellent anticorrosive performance, to the four seasons temperature crosslinking of high-performance epoxy crosslinking agent.
The epoxy resin crosslinking agent has been widely used in the corrosion prevention of steel structure due to its excellent adhesion strength and corrosion resistance. However, the products of normal temperature crosslinking film are the key points in the application, so as to make the development of epoxy resin with normal temperature crosslinking agent more and more rapidly, and the product variety is more and more.
At present commonly used normal temperature cross-linking agent mainly amine and modified amine products, due to its small molecular amine volatile, strong toxicity, limited in use, now mostly not used independently as a crosslinking agent at room temperature. The main current temperature crosslinking agent is the modified amine products, and the typical products are polyamide, mannil, phenolic amine and so on.
Representative products of polyamide are 300, 650, 651, Versamid115, Ancamide2050, etc; The representative products of mannesine are T31 and T33; The representative product of phenolic amine is cashew phenol modified amine. These products are the most representative products of domestic epoxy resin at present, and have different performance characteristics and have been widely used in different fields.
The characteristics of the crosslinking agent of epoxy resins are of several kinds of crosslinking agents. Although they are both normal temperature crosslinking agents, they have different characteristics and have different application fields. The main characteristics are as follows. Polyamide crosslinking agent can be interlinked with epoxy resin. The film has good corrosion resistance and flexibility after crosslinking.
But the drying time is long, the biggest drawback is the low temperature crosslinking performance is poorer, under normal circumstances, the temperature is below 10 ℃ can't carry on normal construction, which limits its use in the winter. Has nice alkali and epoxy resin can be got behind in film at room temperature, the low temperature crosslinking temperature is lower than polyamide resin, basic construction can be above 0 ℃. The best advantage is that it can be closed after the crosslinking, good oil resistance and chemical 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
But its biggest drawback is the film is brittle, the toughness is poor. Cashew phenol modified phenolic aldehyde amine resin with low viscosity, excellent low temperature crosslinking performance, lowest in - 10 ℃ under construction without affecting the process of construction. The film has good flexibility and excellent water resistance, which is best suited for the heavy anti-corrosion products under the Marine environment. Its biggest disadvantage is that it is easy to yellow and has poor chemical resistance.
Cashew phenol modified amine crosslinking agent products with low viscosity, quick drying, low temperature crosslinking performance, good water resistance after crosslinking, excellent anticorrosion performance and four seasons construction performance. At present, the steel structure has occupied most of the market, especially in the field of ships, which is basically the use of such crosslinking agents.
However, compared with polyamide resin and mannisine, there are some problems, mainly in the following aspects.
The paper is changed from yellow to yellow. This is a common problem in the presence of aromatic amines crosslinking agents, which affect their appearance when making light-colored finishes.
The flexibility is poor. Although compared with mannesine, its flexibility has improved a lot, but compared with polyamide crosslinking agent, there are still some gaps.
It's bad. Epoxy resin is a kind of rigid resin, crosslinking agent with cashew phenol modified amine hard surface, after dry film and low surface energy, coating again recoat interval time is shorter, not easy to painting construction.
The compatibility is poor. Due to the unique structure of cashew phenol, it also results in compatibility with other amine crosslinking agents, which is not easy to be mixed with other amine crosslinking agents.
Copyright: Zhang Jia Gang YaRui Chemical co.,Ltd
But its biggest drawback is the film is brittle, the toughness is poor. Cashew phenol modified phenolic aldehyde amine resin with low viscosity, excellent low temperature crosslinking performance, lowest in - 10 ℃ under construction without affecting the process of construction. The film has good flexibility and excellent water resistance, which is best suited for the heavy anti-corrosion products under the Marine environment. Its biggest disadvantage is that it is easy to yellow and has poor chemical resistance.
Cashew phenol modified amine crosslinking agent products with low viscosity, quick drying, low temperature crosslinking performance, good water resistance after crosslinking, excellent anticorrosion performance and four seasons construction performance. At present, the steel structure has occupied most of the market, especially in the field of ships, which is basically the use of such crosslinking agents.
However, compared with polyamide resin and mannisine, there are some problems, mainly in the following aspects.
The paper is changed from yellow to yellow. This is a common problem in the presence of aromatic amines crosslinking agents, which affect their appearance when making light-colored finishes.
The flexibility is poor. Although compared with mannesine, its flexibility has improved a lot, but compared with polyamide crosslinking agent, there are still some gaps.
It's bad. Epoxy resin is a kind of rigid resin, crosslinking agent with cashew phenol modified amine hard surface, after dry film and low surface energy, coating again recoat interval time is shorter, not easy to painting construction.
The compatibility is poor. Due to the unique structure of cashew phenol, it also results in compatibility with other amine crosslinking agents, which is not easy to be mixed with other amine crosslinking agents.
Copyright: Zhang Jia Gang YaRui Chemical co.,Ltd
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