Jin Rong Jie·2025-05-15 05:08Group 1 - China National Petroleum Corporation (CNPC) has applied for a patent for a "technologically adjustable continuous synthesis device and process for polymethyl methacrylate" [1] - The patent application was filed on November 2023 and is aimed at enhancing the polymer synthesis technology [1] - The invention allows for continuous and stable mass production of PMMA molding materials, demonstrating high adaptability and flexibility in raw material systems and process routes [1] Group 2 - CNPC was established in 1999 and is primarily engaged in gas production and supply [2] - The company has a registered capital of 18,302,097,000 RMB [2] - CNPC has invested in 1,277 enterprises and participated in 508 bidding projects, holding 36 trademark records and 5,000 patent records [2]