Group 1 - The project focuses on the technology of synthesizing polycarbonate diols from industrial carbon dioxide emissions, aiming for efficient and high-value utilization of carbon resources [1] - The technology mimics natural photosynthesis and utilizes a self-developed high-efficiency catalyst to convert carbon dioxide and epoxides into polycarbonate diols under near-room temperature and low-pressure conditions [1] - The resulting polycarbonate diols are key raw materials for high-end polyurethane synthesis, featuring high strength, hydrolysis resistance, weather resistance, and biodegradability, with applications in high-value fields such as medical devices and automotive safety glass [1] Group 2 - The technology can produce polycarbonate diols with up to 50% carbon dioxide content, with product prices being one-third to one-sixth of similar high-end market products, showcasing significant advantages in performance, cost, and environmental impact [1] - The project team has extensive experience in carbon dioxide resource utilization, with over 500 SCI papers published and more than 160 domestic and international patents granted [2] - The polyurethane and polyvinyl chloride markets are substantial, being the fifth and third largest polymer materials globally, respectively, indicating a significant potential market impact from this technology [2]

Core Viewpoint - Sichuan Lutianhua Innovation Research Institute Co., Ltd. has applied for a patent for an efficient method of preparing polycarbonate diol, indicating advancements in polymer material synthesis technology [1] Group 1: Patent Application Details - The patent titled "A Method for Efficient Preparation of Polycarbonate Diol" has a publication number CN120535736A and was applied for on June 2025 [1] - The preparation method involves adding raw material diol and catalyst into a polyester reaction kettle under nitrogen protection, followed by a series of temperature-controlled reactions [1] Group 2: Methodology Overview - The process includes heating to 145°C ± 5°C, slowly adding dimethyl carbonate over 4 hours, and then raising the temperature to 180°C for 2 hours [1] - A gradient temperature increase of 1°C/min is applied while reducing pressure, ultimately reaching a temperature of 210°C ± 5°C [1] - The vacuum is gradually increased, and after stabilization, the reaction is maintained at 210°C for 1 to 1.5 hours [1]