约 461,000 个结果
在新选项卡中打开链接
  1. Polyurethane - Wikipedia

    Polyurethane (/ ˌpɒliˈjʊərəˌθeɪn, - jʊəˈrɛθeɪn /; [1] often abbreviated PUR and PU) is a class of polymers composed of organic units joined by carbamate (urethane) links. In contrast to other …

  2. All About Polyurethane - This Old House

    2024年10月8日 · Polyurethane provides a durable, protective finish for floors or furniture in your home. In this guide, we discuss the various types of polyurethane, when to use each one, and …

  3. How to Apply Polyurethane to Wood - The Home Depot

    2025年3月26日 · Learning how to apply polyurethane can give wood furniture and flooring a glossy, smooth finish while improving its durability. Read on for steps on how to apply …

  4. What is polyurethane? - Polyurethanes

    Polyurethanes are plastic polymers made by combining diisocyanates ( TDI and MDI) and polyols. There are literally hundreds of different types of polyurethanes and each is made in a slightly …

  5. Polyurethane | Foam, Synthesis, Plastics | Britannica

    2025年5月31日 · Polyurethane, any of a class of synthetic resinous, fibrous, or elastomeric compounds belonging to the family of organic polymers made by the reaction of diisocyanates …

  6. Polyurethane: Definition, Properties, Types and Applications

    Polyurethane is a versatile synthetic thermoset polymer. Commonly abbreviated as PUR and PU, it is known for its wide application in various industries and offers excellent properties such as …

  7. What is Polyurethane? - BYJU'S

    What is Polyurethane? Polyurethane, often abbreviated to PU or PUR, is an organic polymer that features many organic units linked via urethane molecules. Most polyurethanes do not melt …

  8. Polyurethane - American Chemistry Council

    What is Polyurethane? Polyurethanes are formed by reacting a polyol (an alcohol with more than two reactive hydroxyl groups per molecule) with a diisocyanate or a polymeric isocyanate in …

  9. Understanding Polyurethane: Composition and Applications

    Polyurethane can be defined as a type of polymer composed of organic units joined by urethane links. It’s a synthetic compound synthesized through a chemical reaction between two primary …

  10. What are Polyurethanes? | Beyond Chemistry | Stahl

    Polyurethanes are a type of polymer. They're formed by the chemical reaction between a polyol (an alcohol with more than two reactive hydroxyl groups per molecule) and a diisocyanate or …