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    促进剂对环氧地坪漆的影响有哪些

    2018-11-01 18:57:40 无锡盛发地坪科技有限公司 阅读

    环氧地坪漆的性能随环氧树脂固化促进剂种类的不同而有较大差异,主要表现在以下几个方面:(1)改进环氧树脂涂料的力学性能。环氧树脂涂料的反应活性高、交联密度大,故涂膜抗蚀性好。但同时也存在物理机械性能不足,如弹性较差、脆性偏大等问题,可以通过引入带柔性链段的固化剂,如带长链脂肪酸的聚酰胺予以改进。

    The performance of epoxy floor paint varies greatly with the types of epoxy resin curing accelerators, mainly in the following aspects: (1) Improving the mechanical properties of epoxy resin coatings. The epoxy resin coating has high reactivity and high crosslinking density, so the coating has good corrosion resistance. But at the same time, there are some problems such as poor elasticity and brittleness, which can be improved by introducing curing agent with flexible segments, such as polyamide with long chain fatty acids. (2)改进环氧树脂涂料的工艺性能。

    (2) improve the technological properties of epoxy coatings.

    环氧树脂涂料常在现场大规模施工,存在挥发物的毒性和在潮湿及低温环境下的可操作性问题。近年来国内外开发了多种无毒或低毒,且具有优良的施工性、力学性能和抗蚀性的改性固化剂,如改性酮亚胺类固化剂。

    Epoxy resin coatings are often used in large-scale construction in the field. There are toxicity of volatiles and operability problems in humid and low temperature environment. In recent years, a variety of non-toxic or low toxic curing agents with excellent workability, mechanical properties and corrosion resistance have been developed at home and abroad, such as modified ketimide curing agents.

    (3)改进环氧树脂涂料的耐蚀性。

    (3) improve the corrosion resistance of epoxy coatings.

    不同环氧固化体系的耐蚀性也有较大差别。胺类固化剂固化的环氧树脂耐碱性好而耐酸性较差,因固化后形成的叔胺结构易与酸反应生成叔铵盐。而酸酐固化剂固化的环氧树脂正好相反,耐酸性好而耐碱性较差,因固化后形成的酯基在碱性条件下发生不可逆的水解反应。

    The corrosion resistance of different epoxy curing systems is also quite different. The epoxy resin cured with amine curing agent has good alkali resistance and poor acid resistance. The tertiary amine structure formed after curing is easy to react with acid to form tertiary ammonium salt. On the contrary, the epoxy resin cured with anhydride curing agent has good acid resistance and poor alkali resistance. The ester group formed after curing reacts irreversibly under alkaline conditions.

    (4)改进环氧树脂涂料的耐温性。

    (4) improve the temperature resistance of epoxy coatings.

    采用脂肪族胺固化剂固化的环氧树脂,其热变形温度较低,通常仅为70~80℃。采用合适的芳香族固化剂或酸酐类固化剂,可使热变形温度提高至150℃左右,但后两类固化剂单独应用一般需在加热条件下固化。

    The thermal deformation temperature of epoxy resin cured with aliphatic amine curing agent is low, usually only 70 ~ 80 C. The suitable aromatic curing agent or anhydride curing agent can raise the hot deformation temperature to about 150 C, but the latter two kinds of curing agent should be cured under heating condition.

    (5)改进环氧树脂涂料的介电性能。

    (5) improve the dielectric properties of epoxy coatings.

    当环氧树脂用于绝缘涂料时,可选择使用偏苯二酸酐的改进共聚物作固化剂,可明显提高涂料的耐热性和介电性能。

    When epoxy resin is used in insulating coatings, the modified copolymer of trimellitic anhydride can be selected as curing agent, which can obviously improve the heat resistance and dielectric properties of the coatings.


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