News Details
Epoxy coating with crosslinking agent
2017-4-2 11:38:30
Epoxy coating with crosslinking agent,Used as a crosslinking agent of epoxy polyamide is often low molecular weight liquid resin. Volatile small, small toxicity. Weak irritating to the skin. Good intermiscibility with resin. The crosslinking compound have toughening effect. Improve the impact strength. Room temperature is not easy to finish completely.
Often need to join such as DMP - 30 accelerator, but poor heat resistance, cross-linking heat distortion temperature is only about 60 ℃. Between low molecular weight poly acid amine and benzene dimethylamine or 4, 4 - diamino diphenyl methane mixture, heat distortion temperature can be improved to l00 ℃ or so. Also greatly improve the bonding strength. Commonly used as crosslinking agent of polyamide grades are 200, 300, 400, 600651, etc.
Using organic acid used for dimer vegetable oil fatty acids, such as tung oil linoleic acid dimer team dimers, again with multiple primary amine reaction under high temperature (300 ℃) or polyamide resin. Production methods are (1) high pressure method. (2) the indirect method (methyl oleate method), 3) direct atmospheric pressure method.
The synthesis of polyamide is an important milestone in the development of polymer chemistry. International debate of polymer chain structure theory mainly is the lack of a clear no doubt experimental facts that support. At that time, little enough research of polycondensation reaction, condensation polymer is not complete.
Carothers adopted far more than on method of organic synthesis of general procedures, he in the polymer polycondensation reaction, is very strict with ratio of reactants, are not more than 1% of polycondensation reaction degree is quite complete, more than 99.5%, and synthesis of the polymer molecular weight of twenty thousand or so.
Carothers studies have indicated that the polymer is a kind of real macromolecules, can be obtained from known organic reactions, the polycondensation reaction of each molecule contains two or more than two active group, these groups through covalent bond connection each other, not by a force not sure simple small molecules will be gathered together, which reveals the rule of polycondensation reaction.
Carol was through research on polymerization reaction of the polymer can be broadly divided into two categories: one kind is condensation polymers which are obtained by polycondensation reaction; Another kind is by the addition of polymer addition polymerization.
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
Carothers assistant Florida (1910 ~ 1986), Paul j. Flory polyamide are summarized and a series of polycondensation reaction, proposed the polycondensation reaction in 1939 all the activity of functional group has the same basic principle, and put forward the polycondensation reaction kinetics and molecular weight and the quantitative relationship between polycondensation reaction.
Then studied the statistical mechanics and polymer model, the conformation of the polymer solution of statistical mechanics. The synthesis of polyamide effectively prove the existence of polymer, to TaoDingGe theory believe that don't move, from now on polymer chemistry truly established.
The appearance of the polyamide for transparent or opaque white or yellowish aggregate, apparent cutin, hard products surface luster. The density of polyamide (density of crystalline phase and amorphous density and the density of general processing products) are not the same. Polyamide 6, polyamide 6 fi density is higher, with the molecular of central Asia and increased levels of methyl phthalein ammonia key - HCO (a) the content of reduced, to reduce the degree of crystallinity of polyamide, density decreases. Is a kind of semi crystalline polyamide engineering plastics, there exists a crystalline and non-crystalline area. The proportion of call crystallinity crystal crystal area. The crystallinity of greater effects on the thermal properties of polyamide.
Processing conditions have certain influence to the crystallization of polyamide, injection molding, mold temperature is high, the melt cooling time is longer, the crystallinity of products is higher, and vice versa.
High degree of crystallinity of polyamide has great tensile strength, impact strength and thermal deformation temperature, but the molding shrinkage, elongation at break is smaller.
Polyamide bibulous rate is bigger, the greater the proportion of phthalein ammonia key, bibulous rate is higher, the specific for polyamide 6 > polyamide 66 > polyamide 610 > polyamide 1010 > > polyamide 11 polyamide 12 > polyamide 1212.
Copyright: Zhang Jia Gang YaRui Chemical co.,Ltd
Diethyl toluene diamine(DETDA) http://www.yaruichem.com
Often need to join such as DMP - 30 accelerator, but poor heat resistance, cross-linking heat distortion temperature is only about 60 ℃. Between low molecular weight poly acid amine and benzene dimethylamine or 4, 4 - diamino diphenyl methane mixture, heat distortion temperature can be improved to l00 ℃ or so. Also greatly improve the bonding strength. Commonly used as crosslinking agent of polyamide grades are 200, 300, 400, 600651, etc.
Using organic acid used for dimer vegetable oil fatty acids, such as tung oil linoleic acid dimer team dimers, again with multiple primary amine reaction under high temperature (300 ℃) or polyamide resin. Production methods are (1) high pressure method. (2) the indirect method (methyl oleate method), 3) direct atmospheric pressure method.
The synthesis of polyamide is an important milestone in the development of polymer chemistry. International debate of polymer chain structure theory mainly is the lack of a clear no doubt experimental facts that support. At that time, little enough research of polycondensation reaction, condensation polymer is not complete.
Carothers adopted far more than on method of organic synthesis of general procedures, he in the polymer polycondensation reaction, is very strict with ratio of reactants, are not more than 1% of polycondensation reaction degree is quite complete, more than 99.5%, and synthesis of the polymer molecular weight of twenty thousand or so.
Carothers studies have indicated that the polymer is a kind of real macromolecules, can be obtained from known organic reactions, the polycondensation reaction of each molecule contains two or more than two active group, these groups through covalent bond connection each other, not by a force not sure simple small molecules will be gathered together, which reveals the rule of polycondensation reaction.
Carol was through research on polymerization reaction of the polymer can be broadly divided into two categories: one kind is condensation polymers which are obtained by polycondensation reaction; Another kind is by the addition of polymer addition polymerization.
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
Carothers assistant Florida (1910 ~ 1986), Paul j. Flory polyamide are summarized and a series of polycondensation reaction, proposed the polycondensation reaction in 1939 all the activity of functional group has the same basic principle, and put forward the polycondensation reaction kinetics and molecular weight and the quantitative relationship between polycondensation reaction.
Then studied the statistical mechanics and polymer model, the conformation of the polymer solution of statistical mechanics. The synthesis of polyamide effectively prove the existence of polymer, to TaoDingGe theory believe that don't move, from now on polymer chemistry truly established.
The appearance of the polyamide for transparent or opaque white or yellowish aggregate, apparent cutin, hard products surface luster. The density of polyamide (density of crystalline phase and amorphous density and the density of general processing products) are not the same. Polyamide 6, polyamide 6 fi density is higher, with the molecular of central Asia and increased levels of methyl phthalein ammonia key - HCO (a) the content of reduced, to reduce the degree of crystallinity of polyamide, density decreases. Is a kind of semi crystalline polyamide engineering plastics, there exists a crystalline and non-crystalline area. The proportion of call crystallinity crystal crystal area. The crystallinity of greater effects on the thermal properties of polyamide.
Processing conditions have certain influence to the crystallization of polyamide, injection molding, mold temperature is high, the melt cooling time is longer, the crystallinity of products is higher, and vice versa.
High degree of crystallinity of polyamide has great tensile strength, impact strength and thermal deformation temperature, but the molding shrinkage, elongation at break is smaller.
Polyamide bibulous rate is bigger, the greater the proportion of phthalein ammonia key, bibulous rate is higher, the specific for polyamide 6 > polyamide 66 > polyamide 610 > polyamide 1010 > > polyamide 11 polyamide 12 > polyamide 1212.
Copyright: Zhang Jia Gang YaRui Chemical co.,Ltd
Diethyl toluene diamine(DETDA) http://www.yaruichem.com
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