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Epoxy resin used in paint crosslinking agent
2017-7-14 16:11:43
Epoxy resin used in paint crosslinking agent
A series of epoxy resin coating crosslinking agents were selected and formulated as epoxy coatings. The physical properties and corrosion resistance of epoxy resin coating crosslinker were compared. The cross-linking of epoxy resin coating crosslinker at different temperatures was investigated. Happening.
Epoxy resin coating has excellent anti-corrosion properties and chemical resistance, good mechanical properties of the film, a variety of substrates with excellent adhesion, and a variety of coatings with good performance, with fluorocarbon coatings, polyurethane coatings, Acrylic coatings and other high-performance coating composition supporting system, constitute a long-term anti-corrosion coating. As a long-term anti-corrosion protective coating, has been widely used in ships, marine engineering and other fields.
Epoxy resin containing epoxy and hydroxyl two active groups, with polyamines, polyamide resin, phenolic resin, amino resin, polyisocyanates, etc. made with a variety of coatings. Epoxy resin coating in accordance with the cross-linking temperature can be divided into four categories of cross-linking agent, namely low temperature crosslinking agent, room temperature crosslinking agent, medium temperature crosslinking agent and high temperature crosslinking agent.
At present, the domestic epoxy anti-corrosion coating at room temperature cross-linking of the use of polyamide-based cross-linking agent more. Epoxy / polyamide cross-linking system has been widely used in ships, bridges, oil pipes and other heavy anti-corrosion areas.
However, as with conventional amides, the use of polyamide crosslinkers in low temperature applications is limited. When the temperature is below 10 ° C, the reaction of the polyamide crosslinker with the low molecular weight epoxy resin becomes Very slow, although the use of dimethylaminomethyl phenol as a crosslinking accelerator, it is possible to obtain low temperature (7 ~ 10 ℃) under the crosslinking rate, but still can not meet the requirements of winter construction.
Therefore, the preparation of epoxy paint can be used in low temperature conditions, to meet the steel structure, port machinery, bridges, ships and other large-scale steel structure in winter construction needs, is imperative. Epoxy resin coating low temperature crosslinking agent, and some use of polyisocyanate and polythiol type of cross-linking agent. In this paper, several cross-linking agents were selected, and several groups of formulations were tested. The low-temperature crosslinking and anti-corrosion properties of different crosslinking agents were investigated.
Epoxy resin E44, epoxy resin E20, phenolic modified amine crosslinking agent 1 # (domestic), phenolic modified amine crosslinking agent 2 # (domestic), phenolic modified amine crosslinking agent 3 # (imported) , Modified fatty amine crosslinking agent 4 # (imported), polyamide cross-linking agent 5 # (imported), anti-rust paint, filler, DMP-30, rheological additives, xylene, butanol. 1.2 formulations with several epoxy cross-linking agent were prepared into epoxy zinc-rich primer, epoxy seal paint, epoxy cloud iron paint, epoxy anti-rust primer. Among them, the polyamide crosslinking agent was added to 3% DMP30.
Chinese name: Diethyl toluene diamine(DETDA)
Diethyltoluenediamine Raw material ：
TDA industrial, Sichuan production
Ethylene (Et) polymer grade, Shanghai production
TEA industrial imports
A series of epoxy resin coating crosslinking agents were selected and formulated as epoxy coatings. The physical properties and corrosion resistance of epoxy resin coating crosslinker were compared. The cross-linking of epoxy resin coating crosslinker at different temperatures was investigated. Happening.
Epoxy resin coating has excellent anti-corrosion properties and chemical resistance, good mechanical properties of the film, a variety of substrates with excellent adhesion, and a variety of coatings with good performance, with fluorocarbon coatings, polyurethane coatings, Acrylic coatings and other high-performance coating composition supporting system, constitute a long-term anti-corrosion coating. As a long-term anti-corrosion protective coating, has been widely used in ships, marine engineering and other fields.
Epoxy resin containing epoxy and hydroxyl two active groups, with polyamines, polyamide resin, phenolic resin, amino resin, polyisocyanates, etc. made with a variety of coatings. Epoxy resin coating in accordance with the cross-linking temperature can be divided into four categories of cross-linking agent, namely low temperature crosslinking agent, room temperature crosslinking agent, medium temperature crosslinking agent and high temperature crosslinking agent.
At present, the domestic epoxy anti-corrosion coating at room temperature cross-linking of the use of polyamide-based cross-linking agent more. Epoxy / polyamide cross-linking system has been widely used in ships, bridges, oil pipes and other heavy anti-corrosion areas.
However, as with conventional amides, the use of polyamide crosslinkers in low temperature applications is limited. When the temperature is below 10 ° C, the reaction of the polyamide crosslinker with the low molecular weight epoxy resin becomes Very slow, although the use of dimethylaminomethyl phenol as a crosslinking accelerator, it is possible to obtain low temperature (7 ~ 10 ℃) under the crosslinking rate, but still can not meet the requirements of winter construction.
Therefore, the preparation of epoxy paint can be used in low temperature conditions, to meet the steel structure, port machinery, bridges, ships and other large-scale steel structure in winter construction needs, is imperative. Epoxy resin coating low temperature crosslinking agent, and some use of polyisocyanate and polythiol type of cross-linking agent. In this paper, several cross-linking agents were selected, and several groups of formulations were tested. The low-temperature crosslinking and anti-corrosion properties of different crosslinking agents were investigated.
Epoxy resin E44, epoxy resin E20, phenolic modified amine crosslinking agent 1 # (domestic), phenolic modified amine crosslinking agent 2 # (domestic), phenolic modified amine crosslinking agent 3 # (imported) , Modified fatty amine crosslinking agent 4 # (imported), polyamide cross-linking agent 5 # (imported), anti-rust paint, filler, DMP-30, rheological additives, xylene, butanol. 1.2 formulations with several epoxy cross-linking agent were prepared into epoxy zinc-rich primer, epoxy seal paint, epoxy cloud iron paint, epoxy anti-rust primer. Among them, the polyamide crosslinking agent was added to 3% DMP30.
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
Amine modified crosslinking agent, and polyamide cross-linking agent for comparative testing. For these types of crosslinking agents, from its theoretical analysis has the following characteristics:
Phenolic modified amine cross - linking agent. Crosslinking agent 1 #, crosslinking agent 2 #, cross-linking agent 3 # are phenolic modified amine cross-linking agent. The synthesis of phenolic modified amine type epoxy crosslinking agent is the synthesis of phenolic and polyamine compounds and aldehydes by Mannieh reaction of low molecular weight polymers, different phenols, aldehydes, amines can be synthesized performance Different cross-linking agent.
The chemical reaction of the general formula: phenolic modified amine low temperature crosslinking is mainly dependent on the molecular structure of the phenolic hydroxyl catalyst, to enhance the activity of cross-linking reaction, so that the cross-linking agent has a low temperature, wet cross-linking characteristics The
In the synthesis process, the types of modified amines used are fatty amines, aromatic amines, alicyclic amines and the like, aldehydes are aldehydes such as formaldehyde, acetaldehyde and salicylaldehyde, and phenols include hydroquinone, Diols, cresol, bisphenol A, cardanol and other hydroxyl-containing materials. In general, the study of phenolic modified amine cross-linking agents is mainly focused on the improvement of the synthesis process and in improving its toughness and so on.
Crosslinking agent 1 # modified with aromatic amine, aromatic amine with a fast reaction of fatty amine, non-toxic, colorless and other advantages of aromatic amines and epoxy resin miscibility advantages.
Copyright: Zhang Jia Gang YaRui Chemical co.,Ltd
Amine modified crosslinking agent, and polyamide cross-linking agent for comparative testing. For these types of crosslinking agents, from its theoretical analysis has the following characteristics:
Phenolic modified amine cross - linking agent. Crosslinking agent 1 #, crosslinking agent 2 #, cross-linking agent 3 # are phenolic modified amine cross-linking agent. The synthesis of phenolic modified amine type epoxy crosslinking agent is the synthesis of phenolic and polyamine compounds and aldehydes by Mannieh reaction of low molecular weight polymers, different phenols, aldehydes, amines can be synthesized performance Different cross-linking agent.
The chemical reaction of the general formula: phenolic modified amine low temperature crosslinking is mainly dependent on the molecular structure of the phenolic hydroxyl catalyst, to enhance the activity of cross-linking reaction, so that the cross-linking agent has a low temperature, wet cross-linking characteristics The
In the synthesis process, the types of modified amines used are fatty amines, aromatic amines, alicyclic amines and the like, aldehydes are aldehydes such as formaldehyde, acetaldehyde and salicylaldehyde, and phenols include hydroquinone, Diols, cresol, bisphenol A, cardanol and other hydroxyl-containing materials. In general, the study of phenolic modified amine cross-linking agents is mainly focused on the improvement of the synthesis process and in improving its toughness and so on.
Crosslinking agent 1 # modified with aromatic amine, aromatic amine with a fast reaction of fatty amine, non-toxic, colorless and other advantages of aromatic amines and epoxy resin miscibility advantages.
Copyright: Zhang Jia Gang YaRui Chemical co.,Ltd
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