The scientific community has been pooling all its resources, for the past decade, towards the development of “sustainable development” to usher into an eternally green and sustainable tomorrow. As part of this endeavor, the conventional petroleum-based polyurethane (PU) coatings have been replaced by their green counterparts, i.e., bio-based polyurethane coatings. These green alternatives provide a suitable replacement for the coating industry due to their easy availability, biodegradability, low cost, and lesser environmental impact. The production of such green PU coatings is further facilitated by the utilization of bio-based materials, including vegetable oils and their derivatives such as methyl ester, fatty acid, and other bio-renewable sources. This review discusses the different chemical modifications used to convert these bio-based precursors into desired polyols and isocyanates. Furthermore, the formulation of different PU coatings and their subsequent potential applications are also elaborated on in this review. The coatings sector has already been introduced to the notion of eco-friendly technologies such as UV-curable, less or zero solvent, waterborne, hyperbranched, and high solids coatings, complemented by the incorporation of renewable feedstock in monomer synthesis. The review examines the future hurdles that hinder the utilization of these materials in a wide range of applications and presents technologies that facilitate potential solutions and mention key players in the coating sectors that are at the forefront of bringing these revolutionary changes.

在过去的十年中，科学界一直在将其所有资源集中用于“可持续发展”的发展，以迎接永远绿色和可持续的明天。作为此工作的一部分，常规的石油基聚氨酯（PU）涂料已被其绿色的同类产品（即生物基聚氨酯涂料）取代。这些绿色替代品因其易于获得，可生物降解，低成本和对环境的影响较小而为涂料工业提供了合适的替代品。通过利用生物基材料，包括植物油及其衍生物，如甲酯，脂肪酸和其他生物可再生资源，进一步促进了这种绿色PU涂层的生产。这篇评论讨论了用于将这些基于生物的前体转化为所需的多元醇和异氰酸酯的不同化学修饰。此外，本综述还详细介绍了不同的聚氨酯涂料的配方及其后续潜在应用。涂料行业已经引入了环保技术的概念，例如可紫外线固化，较少或零溶剂，水性，超支化和高固含量涂料，并在单体合成中加入了可再生原料。审查审查了阻碍这些材料在广泛应用中使用的未来障碍，并提出了有助于潜在解决方案的技术，并提到了在涂料领域带来这些革命性变革的最主要参与者。