News Details
T31 paint crosslinking agent
2017-7-13 19:23:03
T31 paint crosslinking agent
Performance comparison of crosslinking agent. The quality index of T31 crosslinking agent of solid formaldehyde. Appearance: light brown yellow transparent viscous liquid viscosity/mPa? S; Density/g? Cm - 3; 1.13 ~ 1.20 pH 8.4 ~ 9.0 solubility soluble in ethanol, acetone and other solvents, slightly soluble in water, according to amine crosslinking mechanism of epoxy resin, crosslinking agent no.t31.welcome crosslinking agent such as epoxy group and amino active hydrogen mole is advisable.
Formula: (quality) DBP10 - E - 44100 no.t31.welcome test results of crosslinking agent is prepared by solid formaldehyde no.t31.welcome and conventional no.t31.welcome crosslinking agent, the data show that performance of crosslinking, bonding strength and sub no.t31.welcome better transparency are solid formaldehyde method.
The phenol should also be excessive 2 ~ 3 times, otherwise the product viscosity is high, affect the operation performance of crosslinking agent. The ratio of aldehydes to phenols is greater than 1, less than 3, or there are more free phenols or aldehydes. According to the above analysis, m amine: m phenol: m aldehyde should be in the range of 1: (0.44 ~ 1.33) : (0.66 ~ 2.0).
At this time, the crosslinking agent has strong ability of crosslinking, almost free of formaldehyde and phenol, which can regulate the viscosity of crosslinking agent through the amount of amine. When the amount of amine and phenol is fixed, the dosage of formaldehyde is changed, and the viscosity and color of the product increases with the amount of formaldehyde, so the amount of formaldehyde should not be too large.
When the amount of amine and aldehyde was fixed, the dosage of phenol was changed, and the viscosity of the product increased with the decrease of phenol. This is due to the decrease in the dosage of phenol, which results in the effect of a phenol molecule on multiple aldehydes, resulting in the increased viscosity of the product.
The dosage of phenol should be appropriate, the amount of phenol is too small, the product viscosity is big, affect the operation; The dosage of phenol is too large, the product viscosity is small, the operation performance is good, but the crosslinking ability decreases. The viscosity of crosslinking agent can be adjusted by the amount of phenol. M amine: m phenol: m aldehyde = 1: (0.8 ~ 1.0) : (0.9 ~ 1.2).
The solid formaldehyde method has an obvious environmental protection advantage compared with the liquid formaldehyde method. Liquid formaldehyde contains about 63% of the water, and solid formaldehyde contains very little water, so the solid formaldehyde method produces only a very small amount of liquid waste. Liquid formaldehyde is volatile, and formaldehyde is very toxic, causing pollution to the environment. However, solid formaldehyde is not volatile and has no pollution to the environment.
Chinese name: Diethyl toluene diamine(DETDA)
Diethyltoluenediamine Uses:
Performance comparison of crosslinking agent. The quality index of T31 crosslinking agent of solid formaldehyde. Appearance: light brown yellow transparent viscous liquid viscosity/mPa? S; Density/g? Cm - 3; 1.13 ~ 1.20 pH 8.4 ~ 9.0 solubility soluble in ethanol, acetone and other solvents, slightly soluble in water, according to amine crosslinking mechanism of epoxy resin, crosslinking agent no.t31.welcome crosslinking agent such as epoxy group and amino active hydrogen mole is advisable.
Formula: (quality) DBP10 - E - 44100 no.t31.welcome test results of crosslinking agent is prepared by solid formaldehyde no.t31.welcome and conventional no.t31.welcome crosslinking agent, the data show that performance of crosslinking, bonding strength and sub no.t31.welcome better transparency are solid formaldehyde method.
The phenol should also be excessive 2 ~ 3 times, otherwise the product viscosity is high, affect the operation performance of crosslinking agent. The ratio of aldehydes to phenols is greater than 1, less than 3, or there are more free phenols or aldehydes. According to the above analysis, m amine: m phenol: m aldehyde should be in the range of 1: (0.44 ~ 1.33) : (0.66 ~ 2.0).
At this time, the crosslinking agent has strong ability of crosslinking, almost free of formaldehyde and phenol, which can regulate the viscosity of crosslinking agent through the amount of amine. When the amount of amine and phenol is fixed, the dosage of formaldehyde is changed, and the viscosity and color of the product increases with the amount of formaldehyde, so the amount of formaldehyde should not be too large.
When the amount of amine and aldehyde was fixed, the dosage of phenol was changed, and the viscosity of the product increased with the decrease of phenol. This is due to the decrease in the dosage of phenol, which results in the effect of a phenol molecule on multiple aldehydes, resulting in the increased viscosity of the product.
The dosage of phenol should be appropriate, the amount of phenol is too small, the product viscosity is big, affect the operation; The dosage of phenol is too large, the product viscosity is small, the operation performance is good, but the crosslinking ability decreases. The viscosity of crosslinking agent can be adjusted by the amount of phenol. M amine: m phenol: m aldehyde = 1: (0.8 ~ 1.0) : (0.9 ~ 1.2).
The solid formaldehyde method has an obvious environmental protection advantage compared with the liquid formaldehyde method. Liquid formaldehyde contains about 63% of the water, and solid formaldehyde contains very little water, so the solid formaldehyde method produces only a very small amount of liquid waste. Liquid formaldehyde is volatile, and formaldehyde is very toxic, causing pollution to the environment. However, solid formaldehyde is not volatile and has no pollution to the environment.
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.
Operating process comparison. Liquid formaldehydehyde method is the drop of formaldehyde, the operation is more troublesome, and the solid formaldehyde method is to put the solid formaldehyde into the reactor once, the operation is simple. Liquid formaldehyde method, introducing the large amounts of water, must be removed vacuum distillation, high energy consumption, and almost no water introduced solid formaldehyde method, just put the solvent and small molecule vacuum distillation to remove content, low energy consumption, low production cost. The appropriate proportion of raw materials is m amine: m phenol: m aldehyde = 1: (0.8 ~ 1.0) : (0.9 ~ 1.2)
The better technology conditions: one-time add 30 min, reaction temperature, reaction is 60 ~ 70 ℃.
The new process of T31 crosslinking agent, the rubber layer is almost colorless transparent, the crosslinking performance is excellent.
Simple operation technology, low energy consumption, no pollution to the environment.
Tensile fracture surface morphology analysis. Homemade crosslinker crosslinked system than T - 31 crosslinking system of tensile fracture surface crack extension is more obvious, more branch crack, stress dispersion degree, fracture surface roughness and form uneven surface crack is pulled up, this is good for stress absorb more energy and have the effect of dispersion, buffer stress, so that the system has very good cracking resistance and toughness, it has to do with self crosslinking agent crosslinking system has higher elongation at break.
Crack propagation and T - 31 crosslinking system is not very obvious, this is because the market is T - 31 crosslinking agent is generally based on phenol, formaldehyde, ethylene diamine made by simple one-step reaction, activity is relatively high, and the crosslinking density of the epoxy resin, relatively concentrated stress, when the force can't resist system effectively cracking resistance, crack, the expiration of the split in brittle fracture morphology
The homemade phenolic modified amine epoxy crosslinking agent is lighter, less viscous, and has better operability than the market price of t-31 crosslinking agent.
Copyright: Zhang Jia Gang YaRui Chemical co.,Ltd
Operating process comparison. Liquid formaldehydehyde method is the drop of formaldehyde, the operation is more troublesome, and the solid formaldehyde method is to put the solid formaldehyde into the reactor once, the operation is simple. Liquid formaldehyde method, introducing the large amounts of water, must be removed vacuum distillation, high energy consumption, and almost no water introduced solid formaldehyde method, just put the solvent and small molecule vacuum distillation to remove content, low energy consumption, low production cost. The appropriate proportion of raw materials is m amine: m phenol: m aldehyde = 1: (0.8 ~ 1.0) : (0.9 ~ 1.2)
The better technology conditions: one-time add 30 min, reaction temperature, reaction is 60 ~ 70 ℃.
The new process of T31 crosslinking agent, the rubber layer is almost colorless transparent, the crosslinking performance is excellent.
Simple operation technology, low energy consumption, no pollution to the environment.
Tensile fracture surface morphology analysis. Homemade crosslinker crosslinked system than T - 31 crosslinking system of tensile fracture surface crack extension is more obvious, more branch crack, stress dispersion degree, fracture surface roughness and form uneven surface crack is pulled up, this is good for stress absorb more energy and have the effect of dispersion, buffer stress, so that the system has very good cracking resistance and toughness, it has to do with self crosslinking agent crosslinking system has higher elongation at break.
Crack propagation and T - 31 crosslinking system is not very obvious, this is because the market is T - 31 crosslinking agent is generally based on phenol, formaldehyde, ethylene diamine made by simple one-step reaction, activity is relatively high, and the crosslinking density of the epoxy resin, relatively concentrated stress, when the force can't resist system effectively cracking resistance, crack, the expiration of the split in brittle fracture morphology
The homemade phenolic modified amine epoxy crosslinking agent is lighter, less viscous, and has better operability than the market price of t-31 crosslinking agent.
Copyright: Zhang Jia Gang YaRui Chemical co.,Ltd
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