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安徽昕昕浅谈固化剂如何选择环保无害的

发布时间:2019-03-27 浏览次数:155
安徽昕昕浅谈固化剂如何选择环保无害的

思索固化剂的种类与性能:固化剂的种类对固化物的力学性能、耐热性、耐水性、耐腐蚀性等都有很大影响,例如芳香多胺、咪唑、酸酐等固化剂固化环氧树脂的耐热性高于脂肪族多胺、低分子聚酰胺固化剂;芳香族酸酐固化环氧树脂的耐水性优于芳香二胺和脂肪族多胺固化剂;三亚乙基四胺固化剂耐碱性好,但耐酸性和耐甲醛溶液性较差。脂环族多胺(如异佛尔酮二胺)固化环氧树脂的耐药品性优秀。酸酐固化剂固化环氧树脂的耐碱性优于耐酸性。应依据不同的用处和性能请求选择恰当的固化剂。


安徽昕昕浅谈固化剂如何选择环保无害的


Consider the types and properties of curing agents: The types of curing agents have great influence on the mechanical properties, heat resistance, water resistance and corrosion resistance of cured products. For example, the heat resistance of curing epoxy resin with aromatic polyamine, imidazole, anhydride and other curing agents is higher than that of aliphatic polyamine and low molecular polyamide curing agents; the water resistance of curing epoxy resin with aromatic anhydride is better than that of aromatic diamine and aliphatic group. Polyamine curing agent; triethylenetetramine curing agent has good alkali resistance, but poor acid resistance and formaldehyde solution resistance. Resistance of epoxy resin cured with alicyclic polyamine (e.g. isophorone diamine) is excellent. The alkali resistance of epoxy resin cured by anhydride curing agent is better than that of acid resistance. Appropriate curing agents should be selected according to different applications and performance requirements.


安徽昕昕浅谈固化剂如何选择环保无害的


几种固化剂复合运用:几种固化剂复合运用,能够收到相得益彰的效果,例如低分子聚酰胺固化剂配合少量的间苯二胺固化剂,既可室温固化,又能使固化物韧性增加的同时恰当地进步耐热性。偏苯三酸酐(TMA)与甲基四氢苯酐复合运用,共熔混合物黏度低(25℃,200~250mPa·s),易与环氧树脂互相混合,改善了工艺性。注固化剂的环保性,所选用的固化剂应对人体无危害,对环境无污染,乙二胺绝对不能单独用作固化剂,尽量采用改性胺类固化剂。


安徽昕昕浅谈固化剂如何选择环保无害的


Compound application of several curing agents: Several curing agents can achieve complementary effects. For example, low molecular weight polyamide curing agent combined with a small amount of m-phenylenediamine curing agent can not only cure at room temperature, but also increase the toughness of cured products while properly improving heat resistance. When TMA and methyl tetrahydrophthalic anhydride are combined, the eutectic mixture has low viscosity (25 C, 200-250 mPa. s). It is easy to mix with epoxy resin and improves the technological properties. The curing agent for injection is environmentally friendly. The selected curing agent should be harmless to human body and no pollution to the environment. Ethylenediamine can never be used as a curing agent alone. Modified amine curing agent should be used as far as possible.



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