新戊二醇(NPG)是一种具有两个甲基位置的丙烷-1,3-二醇,化学式为C5H12O2。 工业规模生产结晶物质(图1)始于甲醛和异丁醛的醛反应,该反应产生中间羟基戊二醛,然后加入过多的甲醛或催化醛基加氢至醇基,可转化为新戊二醛。 除了可溶于水、苯和氯仿外,新戊二醇也极易溶于乙醇和二乙醚。

新戊二醇(NPG)是一种特殊的多元醇,由于其化学和热稳定性高,在许多最终用途中具有优越的性能优势。 它是一种独特的二醇,在各种最终用途中具有优越的性能优势。 这些好处来自物质的化学结构。 羟基在原碳原子上的位置允许快速酯化。 新戊二醇及其衍生物具有很高的化学和热稳定性,因为它们在α碳原子上有两个甲基,而不是典型的两个氢原子。

商业用途

它是涂料、增塑剂、润滑剂和聚酯合成中的一种成分。 当产品用于生产聚酯时,它提高了产品的耐热、耐光、耐水性。 合成润滑酯可以通过酯化脂肪酸或羧酸来生产,其氧化或水解风险比天然酯小。 NPG主要用于涂料用基性树脂。 新戊二醇在粉末涂料配方中提供了玻璃转变温度和熔点之间的微小变化。 一般金属 、 电器 、 金属家具 、 汽车和机械涂料是重要的应用领域.

此外,合成润滑油、润滑脂、金属加工液、液压液和飞机发动机润滑油都有重要的应用。 其他市场包括纺织品、药品、杀虫剂、增塑剂和石油。 高品质NPG的薄片、熔融、浆料形态全部出厂。 对于工业涂料和玻璃纤维增强塑料应用,高质量的NPG是聚酯树脂的关键成分。 在大多数聚酯树脂配方中,NPG要么是唯一的乙二醇存在,要么是与另一种乙二醇结合,从而赋予树脂所需的性能。 此外,NPG还用于聚酯多元醇,为汽车、工业维修、运输和航空航天工业制造聚氨酯涂料。

根据特定的联邦食品添加剂条例,在美国,新戊二醇可以合法地用作涂料和其他与食品接触的产品反应物。
此外,NPG还指出,新戊二醇塑料晶体表现出一种称为巨大压热效应(CBCEs)的冷却效应,这种效应是由压力诱导的相变引起的。 在接近室温时,每开尔文熵变化大约为每公斤389焦耳。 未来的固态制冷技术可能将从这一CBCE现象中受益匪浅。

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