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油漆固化剂的作用和中温固化剂的概念

发布时间:2019-03-28 浏览次数:132
油漆固化剂的作用和中温固化剂的概念
油漆固化剂的作用是什么?涂料固化剂按用途可分为室温固化剂和加热固化剂。如前所述,环氧树脂在高温固化时具有优异的通用性能,但民用建筑中使用的涂料和胶粘剂由于加热困难,需要在室温下固化,因此大部分使用脂肪族胺、脂肪族环和聚酰胺,尤其是冬季使用的涂料和胶粘剂。必须与多异氰酸酯结合,或使用带有恶臭气味的聚芳醇。

What is the function of paint curing agent? Coatings curing agents can be divided into room temperature curing agents and heating curing agents according to their uses. As mentioned above, epoxy resin has excellent general properties when cured at high temperature, but the coatings and adhesives used in civil buildings need to be cured at room temperature due to the difficulty of heating, so most of them use aliphatic amines, aliphatic rings and polyamides, especially coatings and adhesives used in winter. It must be combined with polyisocyanates or use polyaromatic alcohols with a foul odor.

油漆固化剂的作用和中温固化剂的概念


中温固化剂和高温固化剂应以种植体的耐热性和固化材料的耐热性、粘附性和电阻为基准。选择集中在多胺和酸酐。由于酸酐固化产品具有优良的电性能,因此在电子和电气领域得到了广泛的应用。脂肪族多胺固化物具有优异的粘附性、耐碱性和耐水性。芳香族多胺也有很好的抗药性。由于氨基的氮元素与金属形成氢键,具有良好的防锈效果。胺浓度越高,防锈效果越好。酸酐固化剂与环氧树脂的酯键对有机酸和无机酸具有很高的抗性,其电性能普遍优于多胺。

Medium temperature curing agent and high temperature curing agent should be based on the heat resistance of implant and the heat resistance, adhesion and resistance of curing material. Choices are concentrated in polyamines and anhydrides. Because of its excellent electrical properties, acid anhydride curing products have been widely used in electronic and electrical fields. Aliphatic polyamines have excellent adhesion, alkali resistance and water resistance. Aromatic polyamines are also very resistant. Because the nitrogen element of amino group forms hydrogen bond with metal, it has good antirust effect. The higher the concentration of amine, the better the anti-rust effect. The ester bond between anhydride curing agent and epoxy resin has high resistance to organic acid and inorganic acid, and its electrical properties are generally superior to those of polyamines.

油漆固化剂的作用和中温固化剂的概念


什么是中温固化剂的概念:中温固化剂为50-100℃,高温固化剂的固化温度超过100℃,属于低温固化型的固化剂有几种,如多异氰酸酯型和聚芳醇型。我国开发生产的T-31改性胺和YH-82改性胺可在0℃以下固化,室温固化有脂肪族多胺、脂环族多胺、低分子量聚酰胺和改性芳香胺等多种。

What is the concept of mid-temperature curing agent: the curing temperature of mid-temperature curing agent is 50-100 C, and the curing temperature of high-temperature curing agent is more than 100 C. There are several curing agents belonging to low-temperature curing type, such as polyisocyanate type and polyaromatic alcohol type. T-31 modified amine and YH-82 modified amine developed and produced in China can be cured below 0 ~C. Room temperature curing includes aliphatic polyamine, alicyclic polyamine, low molecular weight polyamide and modified aromatic amine.

油漆固化剂的作用和中温固化剂的概念


有一些脂环多胺、叔胺、轨道偶氮和三氟化硼配合物属于中温固化型。芳香族多胺、酸酐、酚醛树脂、氨基树脂、双氰胺和肼是高温固化剂。对于高温固化体系,固化温度通常分为两个阶段,即凝胶化前的低温固化。在达到凝胶状态或略高于凝胶状态后,固化温度(固化后)在高温加热后固化,固化为相对于前阶段的预固化(预固化)。

Some alicyclic polyamines, tertiary amines, orbital azo and boron trifluoride complexes belong to the intermediate temperature curing type. Aromatic polyamines, anhydrides, phenolic resins, amino resins, dicyandiamide and hydrazine are high temperature curing agents. For high temperature curing systems, curing temperature is usually divided into two stages, namely, low temperature curing before gelation. After reaching the gel state or slightly above the gel state, the curing temperature (solidified) solidified at high temperature and solidified as pre curing (pre curing) relative to the previous stage.



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