环氧聚氨酯和聚氨酯的区别

2024-12-13 05:49:36
推荐回答(5个)
回答1:

一、组成不同

1、环氧聚氨酯:为双组份自干型漆,成份一为聚酯色浆,成份二为专用固化剂。

2、聚氨酯:可以分为双组分聚氨酯涂料和单组分聚氨酯涂料。双组分聚氨酯涂料一般是由异氰酸酯预聚物(也叫低分子氨基甲酸酯聚合物)和含羟基树酯两部分组成,通常称为固化剂组分和主剂组分。

二、用途不同

1、环氧聚氨酯:广泛用于要求较高的室内用工业品及木器家具的涂装。

2、聚氨酯:此类漆漆膜光亮丰满、坚硬耐磨,耐油、耐酸、耐化学品和工业废气,电性能好,能和多种树酯混溶,可在广泛范围内调整配方,以满足不同需要。广泛应用于木器、汽车、飞机、机械、电器、仪器仪表、塑料、皮革、纸张、织物、石油化工等各个方面。

三、性能不同

1、环氧聚氨酯:环氧聚氨酯漆具有良好的装饰性和机械性能,硬度和耐磨性较高,且具有耐水、耐油、耐溶剂的特点。

2、聚氨酯:单组分聚氨酯漆的特性:具有良好的耐磨、耐碱、耐油和耐溶剂性,但耐侯性差,不适合室外使用。双组分聚氨酯漆的特性:羟基固化型聚氨酯漆具有可以室温干燥、毒性小、漆膜坚韧、光泽度高、附着力好、耐侵蚀性、耐油、耐水机能优良等长处。

参考资料来源:百度百科-环氧聚氨酯漆

参考资料来源:百度百科-聚氨酯漆

回答2:

两种是不同的材料生产的地坪,根据使用的要求去选择的。
聚氨酯地坪涂料是指以分子主链结构中含有重复出现的氨基甲酸酯(—NHCOO—)特征单元的高分子化合物为成膜物的一类地坪涂料;广义的聚氨酯地坪涂料的成膜物不局限于聚氨酯,还包括聚脲以及聚氨酯/聚脲杂合体,所谓聚脲是指分子主链结构中含有重复出现的脲基甲酸酯(─NHCONH─)重复结构单元的一类高分子化合物。
环氧树脂是分子结构中含有两个以上环氧基团且能交联的一类合成树脂。环氧基团是由一个氧原子和两个碳原子组成的环,即—C—C—/O,具有高度的活泼性,使环氧树脂能够与多种类型的固化剂产生交联反应,形成三维网状结构的高聚物。环氧树脂的性能与分子量有重要关系:低分子量环氧树脂的硬度高,脆性大,冲击强度不高;线型环氧树脂附着力强,抗水性差,多用挥发型涂料;中分子量环氧树脂硬度,柔韧性适中。

回答3:

所谓的环氧聚氨酯,是用高羟基含量的环氧树脂作为羟基组份或组份的一部分与异氰酸酯(TDI、MDI、HDI等单体或预聚体)反应的历程。
聚氨酯:简称"PU",是羟基组份或氨基组分与异氰酸酯(TDI、MDI、HDI等单体或预聚体)反应的历程。羟基和氨基组份可选择的余地很大(比如涂料可以选择羟基聚酯树脂、蓖麻油、聚醚多元醇等;如果是热固性聚氨酯弹性体,就是小分子的羟基和氨基组份作为固化交联剂来使用了),也正因为此,所以聚氨酯应用很广泛:从泡沫、涂料、弹性体到纤维等。

回答4:

环氧聚氨酯还没听说过。可能是改性的

回答5:

你说的是环氧树脂吧

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