News Details
Organic urea low-temperature paint crosslinking agent
2017-8-16 11:41:55
Organic urea low-temperature paint crosslinking agent
According to a certain quality of epoxy resin, crushing to the particle size is less than 35 microns, adding organic type of low temperature crosslinking agent, pigment (rutile type titanium pigment), degassing agent (benzoin), packing (barium sulfate), etc., after fully blending melt extrusion, extrusion sheet after cooling after crushing, crushing, sieving, namely for powder coating.
Improved production process. Will be A certain amount of epoxy resin and bisphenol A in the organic combination of low-temperature crosslinking agent such as urea, then add the pigments, fillers and other additives, etc., after fully blending melt extrusion.
Infrared spectrum analysis of the crosslinking reaction of epoxy resin. In order to detect resin and organic low-temperature crosslinking agent of reaction conditions, such as urea resin and the reaction of the crosslinking agent type, the containing of bisphenol A epoxy resin, organic urea crosslinking agent, containing of bisphenol A epoxy resin and organic urea class after crosslinking agent of crosslinking reaction of the product of infrared spectrum analysis, respectively.
At 1610, 1510, 1459 cm-1 is the absorption peak of the vibration feature of the benzene ring skeleton; The benzene ring is shown in 830,770 cm-1. At 1380,1367 cm-1, the characteristics of the two peaks were absorbed. Four absorption peaks appeared at 3000 ~ 2800cm-1, indicating that methyl and methylene were present simultaneously. 1250cm-1 is the telescopic vibration absorption peak of aromatic ether c-o. 3365cm-1 is the absorption peak of hydroxyl and n-h bonds; 1647cm-1 is the expansion vibration absorption peak of C O key (amide! Zone); The absorption peak at 1544cm-1 is due to the coupling between the c-n bond expansion vibration and the n-h bond bending vibration. Belt). According to these absorption peaks, the substance can be identified as organic urea compounds containing bisphenol A.
Chinese name: Diethyl toluene diamine(DETDA)
Diethyltoluenediamine Uses:
According to a certain quality of epoxy resin, crushing to the particle size is less than 35 microns, adding organic type of low temperature crosslinking agent, pigment (rutile type titanium pigment), degassing agent (benzoin), packing (barium sulfate), etc., after fully blending melt extrusion, extrusion sheet after cooling after crushing, crushing, sieving, namely for powder coating.
Improved production process. Will be A certain amount of epoxy resin and bisphenol A in the organic combination of low-temperature crosslinking agent such as urea, then add the pigments, fillers and other additives, etc., after fully blending melt extrusion.
Infrared spectrum analysis of the crosslinking reaction of epoxy resin. In order to detect resin and organic low-temperature crosslinking agent of reaction conditions, such as urea resin and the reaction of the crosslinking agent type, the containing of bisphenol A epoxy resin, organic urea crosslinking agent, containing of bisphenol A epoxy resin and organic urea class after crosslinking agent of crosslinking reaction of the product of infrared spectrum analysis, respectively.
At 1610, 1510, 1459 cm-1 is the absorption peak of the vibration feature of the benzene ring skeleton; The benzene ring is shown in 830,770 cm-1. At 1380,1367 cm-1, the characteristics of the two peaks were absorbed. Four absorption peaks appeared at 3000 ~ 2800cm-1, indicating that methyl and methylene were present simultaneously. 1250cm-1 is the telescopic vibration absorption peak of aromatic ether c-o. 3365cm-1 is the absorption peak of hydroxyl and n-h bonds; 1647cm-1 is the expansion vibration absorption peak of C O key (amide! Zone); The absorption peak at 1544cm-1 is due to the coupling between the c-n bond expansion vibration and the n-h bond bending vibration. Belt). According to these absorption peaks, the substance can be identified as organic urea compounds containing bisphenol A.
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.
The characteristic absorption peak of the epoxy base is 914cm-1. At 1610 1510 and 1459cm-1, the absorption peak of the vibration features of the benzene ring skeleton; The benzene ring is shown in 830,770 cm-1. The absorption peak of hydroxyl at 3415cm-1; The symmetric and asymmetric telescopic vibration absorption peaks of aromatic ether c-o were found in 1250,1038cm-1. Four absorption peaks appeared at 3000 ~ 2800cm-1, indicating that methyl and methylene were present simultaneously. At 1380,1367 cm-1, the characteristic absorption peak of the two peaks is characterized by the two peaks. Thus the substance is A bisphenol A epoxy resin.
The characteristics of the epoxy base at 914cm-1 disappear; The absorption peak of 1647cm-1 (amide I band) was observed, but no more than 1544cm-1 (amides) was observed. The absorption peak of the belt. It can be seen that the n-h key of secondary amide group disappears, and 3365cm-1 does not have the absorption peak of n-h bonds, only the absorption peak of hydroxyl.
It is indicated that the secondary amide group of organic urea compounds reacts with the epoxy group, so that the organic urea compounds successfully grafted onto the epoxy resin. Epoxy resin and organic urea have been cross-linked and can form a good network structure.
Powder coating for low temperature crosslinking and crosslinking, rapid low temperature can not only increase the production rate of automatic production line and improve the production efficiency, save energy, but also allows the application of powder coatings is no longer limited to the metal, such as base material, heat resistance and can be applied to plastic products, paper, cardboard and wood heat sensitive substrate surface coating, such as to reduce the production cost of powder coating, expand the application field of powder coating has very important significance. This paper substantially reducing the crosslinking temperature, obvious effect of energy conservation, reduce the baking operation in the process of production cost, save the energy, to guarantee the quality of the crosslinking content at the same time, reduces the crosslinking time, greatly shorten the production cycle, high production efficiency, better economy benefit.
With MDI and 3 - amino propyl amine as raw material, dimethyl synthetic low-temperature crosslinking agent such as a kind of organic urea diphenyl methane - 4-2 / N, N - dimethyl amine c urea, crosslinking agent is 11%, powder coating was produced by the improved technology, epoxy powder coating can make 8 min at 130 degrees Celsius and 140 degrees c for 4 min completely under the condition of crosslinking, greatly reduces the crosslinking temperature, energy saving effect is obvious, physical and mechanical properties of the coating and chemical resistance can meet the requirements of industrial production.
Copyright: Zhang Jia Gang YaRui Chemical co.,Ltd
The characteristic absorption peak of the epoxy base is 914cm-1. At 1610 1510 and 1459cm-1, the absorption peak of the vibration features of the benzene ring skeleton; The benzene ring is shown in 830,770 cm-1. The absorption peak of hydroxyl at 3415cm-1; The symmetric and asymmetric telescopic vibration absorption peaks of aromatic ether c-o were found in 1250,1038cm-1. Four absorption peaks appeared at 3000 ~ 2800cm-1, indicating that methyl and methylene were present simultaneously. At 1380,1367 cm-1, the characteristic absorption peak of the two peaks is characterized by the two peaks. Thus the substance is A bisphenol A epoxy resin.
The characteristics of the epoxy base at 914cm-1 disappear; The absorption peak of 1647cm-1 (amide I band) was observed, but no more than 1544cm-1 (amides) was observed. The absorption peak of the belt. It can be seen that the n-h key of secondary amide group disappears, and 3365cm-1 does not have the absorption peak of n-h bonds, only the absorption peak of hydroxyl.
It is indicated that the secondary amide group of organic urea compounds reacts with the epoxy group, so that the organic urea compounds successfully grafted onto the epoxy resin. Epoxy resin and organic urea have been cross-linked and can form a good network structure.
Powder coating for low temperature crosslinking and crosslinking, rapid low temperature can not only increase the production rate of automatic production line and improve the production efficiency, save energy, but also allows the application of powder coatings is no longer limited to the metal, such as base material, heat resistance and can be applied to plastic products, paper, cardboard and wood heat sensitive substrate surface coating, such as to reduce the production cost of powder coating, expand the application field of powder coating has very important significance. This paper substantially reducing the crosslinking temperature, obvious effect of energy conservation, reduce the baking operation in the process of production cost, save the energy, to guarantee the quality of the crosslinking content at the same time, reduces the crosslinking time, greatly shorten the production cycle, high production efficiency, better economy benefit.
With MDI and 3 - amino propyl amine as raw material, dimethyl synthetic low-temperature crosslinking agent such as a kind of organic urea diphenyl methane - 4-2 / N, N - dimethyl amine c urea, crosslinking agent is 11%, powder coating was produced by the improved technology, epoxy powder coating can make 8 min at 130 degrees Celsius and 140 degrees c for 4 min completely under the condition of crosslinking, greatly reduces the crosslinking temperature, energy saving effect is obvious, physical and mechanical properties of the coating and chemical resistance can meet the requirements of industrial production.
Copyright: Zhang Jia Gang YaRui Chemical co.,Ltd
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