News Details
Dicyandiamide coating crosslinking agent
2017-8-17 12:20:33
Dicyandiamide coating crosslinking agent
In order to improve the low reaction performance of dicyandiamide crosslinking agent, the catalyst or promoter such as imidazole (or imidazole) is needed to accelerate the reaction.
Directly to the dicyandiamide adding such kind of crosslinking agent promoter of mixture called accelerated dicyandiamide, replace groups, introduced by derivative, the most commonly used for aryl of dicyandiamide, to replace dicyandiamide. The representative variety of the replacement of dicyandiamide crosslinking agent is o-methyl-tolyl-biguanide.
It is prepared by condensation of dicyandiamide and o-toluidine in hydrochloric acid. Proxima phanidine melting point 136? The adjacent toluene has improved the compatibility with bisphenol A epoxy resin, and it has A high degree of function. Therefore, the cross-linking performance has been greatly improved compared with that of dicyandiamide. The recommended crosslinking temperature is 160? / 20 min - 180? / 10 min.
Because the solubility of DICY in resin is much better than DICY itself, the storage stability of the system is affected. To this end, the relationship between the cross-linking time and acceptable storage stability is required by selecting the appropriate catalyst variety and dosage.
Dicyanide, or DICY or DCD. It's the dimer of cyanamide, which is also a cyanide derivative of guanidine. Chemical formula C2H4N4. White crystalline powder. Soluble in water, alcohol, glycol and dimethylformamide, which are almost insoluble in ether and benzene. It is stable when dry.
With dicyandiamide and acid reaction, various guanidine can be made. The polycyanodimide is the intermediate of coating, laminate and molding powder.
Dicyandiamide and formaldehyde are used as dye fixing agents.
Chinese name: Diethyl toluene diamine(DETDA)
In order to improve the low reaction performance of dicyandiamide crosslinking agent, the catalyst or promoter such as imidazole (or imidazole) is needed to accelerate the reaction.
Directly to the dicyandiamide adding such kind of crosslinking agent promoter of mixture called accelerated dicyandiamide, replace groups, introduced by derivative, the most commonly used for aryl of dicyandiamide, to replace dicyandiamide. The representative variety of the replacement of dicyandiamide crosslinking agent is o-methyl-tolyl-biguanide.
It is prepared by condensation of dicyandiamide and o-toluidine in hydrochloric acid. Proxima phanidine melting point 136? The adjacent toluene has improved the compatibility with bisphenol A epoxy resin, and it has A high degree of function. Therefore, the cross-linking performance has been greatly improved compared with that of dicyandiamide. The recommended crosslinking temperature is 160? / 20 min - 180? / 10 min.
Because the solubility of DICY in resin is much better than DICY itself, the storage stability of the system is affected. To this end, the relationship between the cross-linking time and acceptable storage stability is required by selecting the appropriate catalyst variety and dosage.
Dicyanide, or DICY or DCD. It's the dimer of cyanamide, which is also a cyanide derivative of guanidine. Chemical formula C2H4N4. White crystalline powder. Soluble in water, alcohol, glycol and dimethylformamide, which are almost insoluble in ether and benzene. It is stable when dry.
With dicyandiamide and acid reaction, various guanidine can be made. The polycyanodimide is the intermediate of coating, laminate and molding powder.
Dicyandiamide and formaldehyde are used as dye fixing agents.
Chinese name: Diethyl toluene diamine(DETDA)
Diethyltoluenediamine packing： net weight 200KG/ galvanized iron drum (a small cabinet pallet loaded 16 tons), 1000KG/IB barrels (a small cabinet loaded 18 tons or 23 tons of ISOTANK).
The compound fertilizer of dicyandiamide can control the activity of nitrifying bacteria, so as to adjust the conversion speed of nitrogen in soil, reduce the loss of nitrogen and improve the efficiency of fertilizer use.
It is used in medicine for the preparation of nitroguanide, sulfonamide and other drugs. Also used for the preparation of thiourea, cellulose nitrate stabilizer, rubber vulcanization accelerator, steel surface hardener, artificial leather packing, adhesives, etc. The intermediates of the intermediates were 5 - nitropyrimidine by the reaction of dicyandiamide and formic acid. Nitrogen is doped with nitrogen as nitrogen source.
Calcium cyanamide hydrolyzed calcium hydrogen cyanide ammonia slurry, the reduced pressure filtration to remove calcium hydroxide filter residue, to filtrate flux into the carbon dioxide to precipitate calcium in the form of calcium carbonate, get cyanamid fluid. It can be polymerized under alkaline conditions, then filtered, cooled crystallization, separated and dried.
The temperature at the maximum speed of the dicyanide is related to the pH:50℃时pH为9.7； 80℃时pH为9.1； 100 ℃ at pH 8.8. After polymerization under these conditions, the product is cooled and crystallized, separated and dried. Industrial products contain 99% of the cyanide content, and consume lime nitrogen (more than 21% of nitrogen) for every ton of products.
The film forming process of emulsion coatings and the two main factors affecting the cross-linking of paint film: diffusion velocity and crosslinking speed.
At present, the theory and application of waterborne coatings research has made great progress, application scope expands unceasingly, the quality of the coating product, low pollution, environment friendly for the coating industry and a major step forward in the direction of the sustainable development.
The most important thing in water - based coating is the emulsion coating and the water dispersion coating. In fact, emulsion coating is also considered as a kind of polymer particle which is prepared by emulsion polymerization. In addition to the application of relatively mature building coatings, the main aim is to develop emulsion coatings that can be used as OEM coatings, gradually replacing the solvent coatings.
Copyright: Zhang Jia Gang YaRui Chemical co.,Ltd
The compound fertilizer of dicyandiamide can control the activity of nitrifying bacteria, so as to adjust the conversion speed of nitrogen in soil, reduce the loss of nitrogen and improve the efficiency of fertilizer use.
It is used in medicine for the preparation of nitroguanide, sulfonamide and other drugs. Also used for the preparation of thiourea, cellulose nitrate stabilizer, rubber vulcanization accelerator, steel surface hardener, artificial leather packing, adhesives, etc. The intermediates of the intermediates were 5 - nitropyrimidine by the reaction of dicyandiamide and formic acid. Nitrogen is doped with nitrogen as nitrogen source.
Calcium cyanamide hydrolyzed calcium hydrogen cyanide ammonia slurry, the reduced pressure filtration to remove calcium hydroxide filter residue, to filtrate flux into the carbon dioxide to precipitate calcium in the form of calcium carbonate, get cyanamid fluid. It can be polymerized under alkaline conditions, then filtered, cooled crystallization, separated and dried.
The temperature at the maximum speed of the dicyanide is related to the pH:50℃时pH为9.7； 80℃时pH为9.1； 100 ℃ at pH 8.8. After polymerization under these conditions, the product is cooled and crystallized, separated and dried. Industrial products contain 99% of the cyanide content, and consume lime nitrogen (more than 21% of nitrogen) for every ton of products.
The film forming process of emulsion coatings and the two main factors affecting the cross-linking of paint film: diffusion velocity and crosslinking speed.
At present, the theory and application of waterborne coatings research has made great progress, application scope expands unceasingly, the quality of the coating product, low pollution, environment friendly for the coating industry and a major step forward in the direction of the sustainable development.
The most important thing in water - based coating is the emulsion coating and the water dispersion coating. In fact, emulsion coating is also considered as a kind of polymer particle which is prepared by emulsion polymerization. In addition to the application of relatively mature building coatings, the main aim is to develop emulsion coatings that can be used as OEM coatings, gradually replacing the solvent coatings.
Copyright: Zhang Jia Gang YaRui Chemical co.,Ltd
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