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Laminamide coatings crosslinking agent
2017-7-6 23:46:32
Laminamide coatings crosslinking agent
Amide amine crosslinking agent is condensed into a kind of vegetable oil fatty acids with multiple amine amides (e.g., C17H35CON2HCH2CH2NHCH2CH2NH2), amide amine crosslinking agent on the surface has good wettability, use range wide, humidity is not sensitive to the environment, can be used for wet surface or underwater coating glue.
Due to dehydration can manufacture high temperature rise when generate imidazole (e.g., 1 - (Α amino ethyl - 2-17 carbon alkyl imidazole), so the viscosity is none too high.
Amines self-condensation reaction modification. Between benzene dimethylamine in 180 ~ 200 ℃ in the presence of catalyst between reaction to condensation compound H2NCH2C6H4CH2NHCH2C6H4CH2NH2, typical products are 105 amine, GY - 051 amine, the crosslinking agent can be cross-linked epoxy resin at room temperature, longer lifespan, crosslinking better comprehensive performance.
Boron trifluoride complex. Boron trifluoride can room temperature rapid crosslinking glycidyl ether epoxy resin, because of its irritating and corrosion resistance, easy deliquescence and there is not appropriate as crosslinking agent, but with the amine complex after the formation of the complex general agent in epoxy resin of latent sexual intercourse.
Polyethylene-chlorosulfonated polyethylene was modified by polyethylene. Multiple amine and chlorosulfonated polyethylene by the reaction of 1 ~ 5:1 product can at 0, 5 ℃ (8 h) crosslinked epoxy resin, amount to 3313 (30 ~ 35) PHR, often for underwater crosslinking agent at low temperature.
Physical method modification. Will several solid amine (aromatic amine) or liquid amine (fatty amine) and solid amine (aromatic amine) melt blending, or low melting solid liquid mixed amine can be formed, so that blending crosslinking with resin, such as benzene dimethylamine between crosslinking agent is 708, 4, 4 a mixture of two amino diphenyl methane (containing a small amount of imidazole).
It also turns solid amine into cold liquid. Such as benzene dimethylamine between 90 min at 110 ℃ heating melt completely, then slowly cooling to room temperature (25 ℃), can keep the seven months without crystallization. Due to the active performance of amines (especially fatty amines), it can be modified in a variety of ways and cannot be comprehensively described.
In fact some modified product as epoxy crosslinking agent may not have practical significance, but much ambient crosslinking epoxy resin, modified amine and volatile small, low toxicity, wide usage, crosslinking performance is generally better than unmodified.
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
Due to special molecular structure of epoxy resin, epoxy resin coating to metal, glass, ceramics, concrete, wood and other polarity has good adhesion and excellent chemical resistance, is the largest number and range of the most widely used heavy-duty coating resin. Epoxy resin is modified with different crosslinking agents, which gives the epoxy system different characteristics.
Comprehensive the above test results, as well as on consulting a large number of literature material, can be obtained, because of the cashew phenol modified phenolic aldehyde amine system low surface energy, good wettability, the substrate to substrate processing requirement is not high, but it is easier to become yellow, ultraviolet light influence on film corrosion is not too big, and more suitable for used as a primer.
Polyamide epoxy system is flexible, the color changes slowly, and the weatherability can be better than the phenol modified phenolic epoxy system, which is more suitable for surface paint.
Impact test: refer to GB/T2571) 1995, no gap style, normal temperature test, span of 60mm. The crosslinking process will mix the resin A with the crosslinking agent in A certain proportion, and put into the vacuum drying oven to remove the air bubble (room temperature), pour into the mould, settle for 12h, and put in the oven for crosslinking. The obtained sample is used for testing.
Ratio of resin mixed with the crosslinking agent and conditions of crosslinking Moore epoxide group and lively hydrogen reaction calculation resin system and the dosage of crosslinking agent theory, the crosslinking agent ratio by 5%, to get the actual usage ratio.
Copyright: Zhang Jia Gang YaRui Chemical co.,Ltd
Copyright: Zhang Jia Gang YaRui Chemical co.,Ltd
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