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首页> 外文期刊>Journal of Polymers and the Environment >Polyols and Rigid Polyurethane Foams from Cashew Nut Shell Liquid
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Polyols and Rigid Polyurethane Foams from Cashew Nut Shell Liquid

机译：腰果壳液中的多元醇和硬质聚氨酯泡沫

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摘要

Cashew nut shell liquid (CNSL) is a natural aromatic oil consisting of a mixture of phenolic structures with a carboxyl group in ortho position and substituted in meta position with a hydrocarbon chain of 15 carbon atoms. The major component of CNSL is anacardic acid (90 %), which is easily decarboxylated to cardanol by distillation. The present work describes the synthesis of new biobased Mannich polyols for rigid polyurethane foams in two steps: synthesis of Mannich bases by reacting phenolic ring of cardanol with Af-(2-hydroxyethyl)-1,3-oxazolidine followed by alkoxylation reactions. The polyols were characterized by wet methods (hydroxyl numbers, viscosity, acid value, density, water content, iodine value etc.), spectroscopic methods (FT-IR, 'H NMR and ~(13)C NMR) and by Gel Permeation Chromatography. The Mannich polyols from cardanol are excellent replacements for petrochemical derived Mannich polyols based on nonyl phenol. Cardanol-based polyols were used successfully for the preparation of rigid polyurethane foams of good physical-mechanical and fireproofing properties.
机译：腰果壳液（CNSL）是一种天然芳香油，由邻位具有羧基的酚结构和在间位被15个碳原子的烃链取代的混合物组成。 CNSL的主要成分是茴香酸（90％），其很容易通过蒸馏脱羧成腰果酚。本工作描述了用于硬质聚氨酯泡沫的新型生物基曼尼希多元醇的合成，分两步进行：通过将腰果酚的酚环与Af-（2-羟乙基）-1,3-恶唑烷反应，然后进行烷氧基化反应，合成曼尼希碱。通过湿法（羟值，粘度，酸值，密度，水含量，碘值等），光谱法（FT-IR，1H NMR和〜（13）C NMR）以及凝胶渗透色谱法对多元醇进行表征。 。腰果酚的曼尼希多元醇是石油化工衍生的基于壬基苯酚的曼尼希多元醇的绝佳替代品。基于腰果酚的多元醇已成功用于制备具有良好物理机械和防火性能的硬质聚氨酯泡沫。

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