News Details
Underwater coating crosslinking agent
2017-7-29 11:37:42
Underwater coating crosslinking agent
The structure of mannichyl-type crosslinking agent can be used to crosslink epoxy resin in low temperature and wet environment. Underwater environment can be regarded as an extremely humid environment. The development of crosslinking agent in underwater crosslinking epoxy resin has positive significance in water conservancy construction and anti-seepage prevention of buildings. The application of underwater crosslinking agent in the prevention of seepage and strengthening of underwater buildings has made great progress.
It is reported that using long-chain alkylphenol to replace phenol can be used to introduce water-repellent groups in mannichbase crosslinking agents to synthesize underwater crosslinking agents.
Luguifang et al. proposed the synthesis of mannechyl-type crosslinking agent using nonylphenol, (2, 3 and 12 methyl) diybutyl triamine and formaldehyde. Due to the introduction of containing C9 carbon chain nonylphenol and with double C6 carbon chain fatty amine, the product of the system compared with T a 31 crosslinking agent, keeps the advantages of low temperature crosslinking and the ratio of broad, and tough had the very big enhancement. The equation of this reaction is:
The author and xu xiao-wu and others, using cashews, fatty polyamine and formaldehyde to synthesize manichine crosslinking agent. The crosslinking agent and Esl/E44 epoxy resin reaction, the crosslinking body, the fracture elongation can reach 5% a 9%, while T 1 31 crosslinking agent is only 1%, the flexibility is significantly improved.
Cashew phenol containing unsaturated double bonds in the structure of C15 straight carbon chain structure, this structure makes the crosslinking agent and crosslinking of epoxy resin has good flexibility, its resilience to match that of low molecular polyethylene phthalein amine epoxy crosslinking agent, and it has excellent low temperature crosslinking resistance, adhesion, water resistance and salt fog corrosion resistance.
As mentioned above, the main method to improve the toughness of mannechyl-type crosslinking agent is to introduce long-carbon chain structure, especially phenolic or amine compounds with long straight carbon chain structure.
Chinese name: Diethyl toluene diamine(DETDA)
Diethyltoluenediamine Uses:
The structure of mannichyl-type crosslinking agent can be used to crosslink epoxy resin in low temperature and wet environment. Underwater environment can be regarded as an extremely humid environment. The development of crosslinking agent in underwater crosslinking epoxy resin has positive significance in water conservancy construction and anti-seepage prevention of buildings. The application of underwater crosslinking agent in the prevention of seepage and strengthening of underwater buildings has made great progress.
It is reported that using long-chain alkylphenol to replace phenol can be used to introduce water-repellent groups in mannichbase crosslinking agents to synthesize underwater crosslinking agents.
Luguifang et al. proposed the synthesis of mannechyl-type crosslinking agent using nonylphenol, (2, 3 and 12 methyl) diybutyl triamine and formaldehyde. Due to the introduction of containing C9 carbon chain nonylphenol and with double C6 carbon chain fatty amine, the product of the system compared with T a 31 crosslinking agent, keeps the advantages of low temperature crosslinking and the ratio of broad, and tough had the very big enhancement. The equation of this reaction is:
The author and xu xiao-wu and others, using cashews, fatty polyamine and formaldehyde to synthesize manichine crosslinking agent. The crosslinking agent and Esl/E44 epoxy resin reaction, the crosslinking body, the fracture elongation can reach 5% a 9%, while T 1 31 crosslinking agent is only 1%, the flexibility is significantly improved.
Cashew phenol containing unsaturated double bonds in the structure of C15 straight carbon chain structure, this structure makes the crosslinking agent and crosslinking of epoxy resin has good flexibility, its resilience to match that of low molecular polyethylene phthalein amine epoxy crosslinking agent, and it has excellent low temperature crosslinking resistance, adhesion, water resistance and salt fog corrosion resistance.
As mentioned above, the main method to improve the toughness of mannechyl-type crosslinking agent is to introduce long-carbon chain structure, especially phenolic or amine compounds with long straight carbon chain structure.
Chinese name: Diethyl toluene diamine(DETDA)
Diethyltoluenediamine Uses:
The product is identical to Ethancure 100 and Lonza DETDA 80, DETDA is very effective polyurethane elastomer chain extender; also be used as polyurethane and epoxy resin curing agent, epoxy resin of an antioxidant, industrial oils and lubricants . In addition, also as intermediates in organic synthesis.Especially for the RIM (reaction injection molding), is important in the field of spray polyurea chain extender species. Also can be used for casting polyurethane elastomer (CPU) and a curing agent, epoxy curing agent, epoxy resin of antioxidants, lubricants and industrial oils other antioxidants.
Found in the author's practice, using nonylphenol or hexamethylenediamine such as saturated fat long chain structure of the compounds to improve T and crosslinking agent, can improve crosslinking material toughness, and crosslinking velocity, heat resistance and other indicators do not change; Such use cashew phenol and tung oil containing unsaturated double bond, and special long chain compounds for synthesis of mannich bases crosslinking agent, toughening effect is particularly significant, toughness of crosslinking system can achieve even more than low molecular polyethylene phthalein amine crosslinking system, could significantly increase at the same time, the crosslinking slower, and heat resistance can be decreased.
The mannichyl-type crosslinking agent structure contains the benzene ring, which is better in the normal temperature crosslinking agent. With the use of phenol, formaldehyde and ethylene diamine synthesis 31 T a crosslinking agent, for example, with 51 resin of cross-linked E a Tg at 80 ℃ or so and can meet the requirements of general application of the heat. But in some applications, the epoxy crosslinking agent demand higher heat resistance, such as li-hong LAN, are mentioned, such as Hou Qianping will heat resistance good mannich bases crosslinking agent, used for the preparation of room temperature crosslinking and 150 ~ 200 ℃ high temperature resistant special adhesive.
U · of Swiss bell puts forward using resorcinol, 3, 5 xylenol and methyl phenol replace between phenol and triethylene tetramine/four ethylene five amine and formaldehyde reaction to obtain a series of mannich bases for epoxy crosslinking agent. Obtained by crosslinking agent and HunstmanAralditeGY250 resin of cross-linked Tg temperature close to or more than 100 ℃.
The author USES alkyl phenol, diphenylenediamine and formaldehyde to synthesize mannihedrine crosslinking agent, which contains the double benzene ring structure, which is combined with CYD128 resin, and the crosslinking structure is compact and has a high hardness. The couplet of Tg can reach 120 ℃ or so, wet and heat ageing resistance is superior.
Copyright: Zhang Jia Gang YaRui Chemical co.,Ltd
Found in the author's practice, using nonylphenol or hexamethylenediamine such as saturated fat long chain structure of the compounds to improve T and crosslinking agent, can improve crosslinking material toughness, and crosslinking velocity, heat resistance and other indicators do not change; Such use cashew phenol and tung oil containing unsaturated double bond, and special long chain compounds for synthesis of mannich bases crosslinking agent, toughening effect is particularly significant, toughness of crosslinking system can achieve even more than low molecular polyethylene phthalein amine crosslinking system, could significantly increase at the same time, the crosslinking slower, and heat resistance can be decreased.
The mannichyl-type crosslinking agent structure contains the benzene ring, which is better in the normal temperature crosslinking agent. With the use of phenol, formaldehyde and ethylene diamine synthesis 31 T a crosslinking agent, for example, with 51 resin of cross-linked E a Tg at 80 ℃ or so and can meet the requirements of general application of the heat. But in some applications, the epoxy crosslinking agent demand higher heat resistance, such as li-hong LAN, are mentioned, such as Hou Qianping will heat resistance good mannich bases crosslinking agent, used for the preparation of room temperature crosslinking and 150 ~ 200 ℃ high temperature resistant special adhesive.
U · of Swiss bell puts forward using resorcinol, 3, 5 xylenol and methyl phenol replace between phenol and triethylene tetramine/four ethylene five amine and formaldehyde reaction to obtain a series of mannich bases for epoxy crosslinking agent. Obtained by crosslinking agent and HunstmanAralditeGY250 resin of cross-linked Tg temperature close to or more than 100 ℃.
The author USES alkyl phenol, diphenylenediamine and formaldehyde to synthesize mannihedrine crosslinking agent, which contains the double benzene ring structure, which is combined with CYD128 resin, and the crosslinking structure is compact and has a high hardness. The couplet of Tg can reach 120 ℃ or so, wet and heat ageing resistance is superior.
Copyright: Zhang Jia Gang YaRui Chemical co.,Ltd
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