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The mixture ratio of epoxy resin and paint crosslinking agent is calculated
2017-8-4 11:14:18
The mixture ratio of epoxy resin and paint crosslinking agent is calculated
To understand the mixture ratio of epoxy resin and crosslinking agent, the first thing to understand is that in theory, one epoxy and one amine hydrogenation ratio, in fact, it would be a little bit more than the epoxy biamines, about 1.2 to 1.
At present, epoxies are generally labeled with epoxy-value, converting it to epoxy-equivalent, epoxy-equivalent = 100 / epoxy, and epoxy equivalent is the quality of a resin containing 1 mole of epoxy.
The amines cross linking agent is now labeled with amine value, converting it to amine hydrogen equivalent, amine hydrogen equivalent is 56000 / amine value, and amine hydrogen equivalent is the quality of resin containing 1 mole of active hydrogen. The ratio of epoxy resin and crosslinking agent is the ratio of epoxide equivalent to amines equivalent.
Note that this is pure resin, and if you have a solvent, you divide it by the amount of solid content, and then the ratio, if it's a reactive diluent, it's another meter. This model is also available for other types of crosslinking agents.
Example: E - 44 epoxy, epoxy value, 0.44, the solid content: 70%, crosslinking agent amine value 240, 60% solid content, epoxy equivalent = 100/0.44 = 227.3, amine hydrogen equivalent = 56000/240 = 233.3, it should be matching, 227.3/0.7, 233.3/0.6 = 324.7:388.8 the reactive diluent.
Because the epoxy resin in the water-based epoxy resin system has been pre-prepared with the emulsion, it is not necessary to emulsify the epoxy resin with the waterborne epoxy crosslinking agent, so it is only necessary to have the function of crosslinking agent.
# type water-borne epoxy crosslinking agent and type I modified waterborne epoxy crosslinking agent has similarities, such as polyamide resin reaction with acetic acid, phosphoric acid or hydrochloric acid ammonium salt, and assisted in ethanol solvent soluble in water and be modified polyamide crosslinking agent.
Currently used # type water-borne epoxy crosslinking agent is mainly used with hydrophilic segments of fatty amine polyoxyethylene chain or glycidyl ether epoxy resin or more ethylene polyamine reaction of epoxy - amine crosslinking agent, or react with dimer acid generated polyamide kind of crosslinking agent, which makes use of the hydrophilicity of polyoxyethylene chain segment that crosslinking agent can stable dispersion in water, and using epoxy resin as chain extender can improve the compatibility of crosslinking agent and epoxy resin.
Such as Klein adopts two glycidyl polyoxyethylene ether get epoxy resin and bisphenol A epoxy resin reaction you repose, again with polyethylene oxide propylene diamine and isophorone diamine reaction - amine epoxy crosslinking agent.
Chinese name: Diethyl toluene diamine(DETDA)
Physical and chemical properties: light yellow transparent liquid, slightly soluble in water, soluble in alcohols, ethers, ketones and other polar organic solvents, and polyether, polyester polyol compatibility.
Density 1.022
Viscosity (20 ℃) ??mPa·ss290±10
Pour Point ℃-9
Boiling point of310°C
To understand the mixture ratio of epoxy resin and crosslinking agent, the first thing to understand is that in theory, one epoxy and one amine hydrogenation ratio, in fact, it would be a little bit more than the epoxy biamines, about 1.2 to 1.
At present, epoxies are generally labeled with epoxy-value, converting it to epoxy-equivalent, epoxy-equivalent = 100 / epoxy, and epoxy equivalent is the quality of a resin containing 1 mole of epoxy.
The amines cross linking agent is now labeled with amine value, converting it to amine hydrogen equivalent, amine hydrogen equivalent is 56000 / amine value, and amine hydrogen equivalent is the quality of resin containing 1 mole of active hydrogen. The ratio of epoxy resin and crosslinking agent is the ratio of epoxide equivalent to amines equivalent.
Note that this is pure resin, and if you have a solvent, you divide it by the amount of solid content, and then the ratio, if it's a reactive diluent, it's another meter. This model is also available for other types of crosslinking agents.
Example: E - 44 epoxy, epoxy value, 0.44, the solid content: 70%, crosslinking agent amine value 240, 60% solid content, epoxy equivalent = 100/0.44 = 227.3, amine hydrogen equivalent = 56000/240 = 233.3, it should be matching, 227.3/0.7, 233.3/0.6 = 324.7:388.8 the reactive diluent.
Because the epoxy resin in the water-based epoxy resin system has been pre-prepared with the emulsion, it is not necessary to emulsify the epoxy resin with the waterborne epoxy crosslinking agent, so it is only necessary to have the function of crosslinking agent.
# type water-borne epoxy crosslinking agent and type I modified waterborne epoxy crosslinking agent has similarities, such as polyamide resin reaction with acetic acid, phosphoric acid or hydrochloric acid ammonium salt, and assisted in ethanol solvent soluble in water and be modified polyamide crosslinking agent.
Currently used # type water-borne epoxy crosslinking agent is mainly used with hydrophilic segments of fatty amine polyoxyethylene chain or glycidyl ether epoxy resin or more ethylene polyamine reaction of epoxy - amine crosslinking agent, or react with dimer acid generated polyamide kind of crosslinking agent, which makes use of the hydrophilicity of polyoxyethylene chain segment that crosslinking agent can stable dispersion in water, and using epoxy resin as chain extender can improve the compatibility of crosslinking agent and epoxy resin.
Such as Klein adopts two glycidyl polyoxyethylene ether get epoxy resin and bisphenol A epoxy resin reaction you repose, again with polyethylene oxide propylene diamine and isophorone diamine reaction - amine epoxy crosslinking agent.
Chinese name: Diethyl toluene diamine(DETDA)
Physical and chemical properties: light yellow transparent liquid, slightly soluble in water, soluble in alcohols, ethers, ketones and other polar organic solvents, and polyether, polyester polyol compatibility.
Density 1.022
Viscosity (20 ℃) ??mPa·ss290±10
Pour Point ℃-9
Boiling point of310°C
Flash Point°C161.1°C
Klein with bisphenol A epoxy resin, such as two glycidyl polyoxyethylene ether and the reaction of bisphenol A epoxy resin dispersions, reacts with ethylene polyamine generated end amino epoxy - amine adduct, finally the end get # of water-borne epoxy crosslinking agent.
Although it is aromatic amine, but it is involved in crosslinking, it also has the properties of fatty amines, so some of the type # water-based epoxy crosslinking agent is also a modified product of phthalamide.
The epoxy - amine admixture was produced by using the action of benzoyl dimethylamine and epichlorohydrin under the action of sodium hydroxide, as an aqueous epoxy crosslinking agent (g-328) with excellent performance.
The g-328 and dibinary carboxylic acid were used to get the polyamide group crosslinking agent. The hydroxycycline modified products are also used as water-based epoxy crosslinking agents. Such as Vincent, the reaction of the fatty amine with the epoxy resin to generate the end epoxides, and then the crosslinking agent with a kind of lipid cyclamine (PACM) reaction.
Studies a new type # waterborne epoxy crosslinking agent, low activity of crosslinking agent is a kind of water-soluble epoxy - amine adduct, and highly active crosslinking agent is a kind of modified water-soluble epoxy - amine adduct, through the ratio of the two to adjust the reactivity of the crosslinking agent. It does not need to use a coalescing solvent for solid epoxy dispersion, which can produce o-voc epoxy coatings.
The traditional # type water-based epoxy system needs to be added to the polygonal solvent to reduce the Tg of the resin to facilitate the coalescence of the resin particles, which is introduced into the volatile organic solvent. This new type of type # waterborne epoxy crosslinking agent solves this problem.
Copyright: Zhang Jia Gang YaRui Chemical co.,Ltd
Klein with bisphenol A epoxy resin, such as two glycidyl polyoxyethylene ether and the reaction of bisphenol A epoxy resin dispersions, reacts with ethylene polyamine generated end amino epoxy - amine adduct, finally the end get # of water-borne epoxy crosslinking agent.
Although it is aromatic amine, but it is involved in crosslinking, it also has the properties of fatty amines, so some of the type # water-based epoxy crosslinking agent is also a modified product of phthalamide.
The epoxy - amine admixture was produced by using the action of benzoyl dimethylamine and epichlorohydrin under the action of sodium hydroxide, as an aqueous epoxy crosslinking agent (g-328) with excellent performance.
The g-328 and dibinary carboxylic acid were used to get the polyamide group crosslinking agent. The hydroxycycline modified products are also used as water-based epoxy crosslinking agents. Such as Vincent, the reaction of the fatty amine with the epoxy resin to generate the end epoxides, and then the crosslinking agent with a kind of lipid cyclamine (PACM) reaction.
Studies a new type # waterborne epoxy crosslinking agent, low activity of crosslinking agent is a kind of water-soluble epoxy - amine adduct, and highly active crosslinking agent is a kind of modified water-soluble epoxy - amine adduct, through the ratio of the two to adjust the reactivity of the crosslinking agent. It does not need to use a coalescing solvent for solid epoxy dispersion, which can produce o-voc epoxy coatings.
The traditional # type water-based epoxy system needs to be added to the polygonal solvent to reduce the Tg of the resin to facilitate the coalescence of the resin particles, which is introduced into the volatile organic solvent. This new type of type # waterborne epoxy crosslinking agent solves this problem.
Copyright: Zhang Jia Gang YaRui Chemical co.,Ltd
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