Patents for methods of preparing polylactic acid compositions that meet the requirements of applications in fields such as injection molding, film bags, and foaming, as well as for such compositions and their applications, filed by Sinopec
Thread Content
, August 8, 2025 – According to information from the Intellectual Property Office, Sinopec Corporation and Sinopec (Shanghai) Research Institute of Petrochemicals Co., Ltd. have filed a patent application titled “A Method for Preparing a Polyglycolic Acid Composition, as Well as the Composition Itself and Its Applications”. The publication number is CN120441816A, and the application was submitted in February 2024. The patent abstract indicates that the present invention discloses a method for preparing a polyglycolic acid composition, as well as the composition and its applications; it falls within the field of polymer synthesis technology. The method for preparing the polyglycolic acid composition according to the present invention includes step 1): carrying out normal pressure polycondensation reaction using components including hydroxyacid monomers, small-molecule initiators, large-molecule initiators, and catalysts ； Step 2) The reaction mixture from Step 1 is further subjected to reduced-pressure polycondensation to produce the polyglycolic acid composition. According to Tianyancha, Sinopec Corporation was established in 2000 and is located in Beijing; it is a company that is primarily engaged in the exploration and production of oil and natural gas. The registered capital of the enterprise is 121,739,689.893 million RMB. According to the big data analysis conducted by Tianyancha, Sinopec Corporation has invested in 263 companies in total, participated in 5,000 bidding projects. In terms of property-related information, there are 45 trademark records and 5,000 patent records; furthermore, the company holds 40 administrative licenses.
【Ten Years of Rapid Development in Chemical Engineering Equipment】China’s first hydrogen internal combustion engine vehicle was put into trial operation in Cang from 2595 to 2025. https://bbs.hcbbs.com/thread-5698347-1-1.html (Source: Haichuan Chemical Industry Forum)
【Ten Years of Rapid Development in Chemical Engineering Equipment】China’s first hydrogen internal combustion engine vehicle was put into trial operation in Cang from 2595 to 2025. https://bbs.hcbbs.com/thread-5698347-1-1.html (Source: Haichuan Chemical Industry Forum)
【Ten Years of Rapid Development in Chemical Equipment】Good news for 2596–2025! The first domestically produced 450,000 tons per year polypropylene mixing, extrusion, and granulation unit has passed the factory acceptance test at Dalian Heavy Industry. https://bbs.hcbbs.com/thread-5698372-1-1.html (Source: Haichuan Chemical Forum)
【History of Haichuan Chemical】The Disappeared Nanchong Refinery https://bbs.hcbbs.com/thread-5698389-1-1.html (Source: Haichuan Chemical Forum)
【Frontiers of HaiChuan Chemical Technology】New breakthrough in the “magic straw”! Wuhan University team’s low-cost, zero-emission method for restoring saline-alkali soil https://bbs.hcbbs.com/thread-5698419-1-1.html (Source: Haichuan Chemical Industry Forum)
【Ten Years of Rapid Development in Chemical Equipment】2597–2025: Breaking the “material bottleneck” in the display industry chain; China’s first production line for optical-grade MS resin goes into operation https://bbs.hcbbs.com/thread-5698436-1-1.html (Source: Haichuan Chemical Industry Forum)
【Ten Years of Rapid Development in Chemical Equipment】2599–2025: Overcoming Global Technical Barriers; Sinopec’s self-developed polypropylene catalyst unit achieved successful commissioning on the first attempt. https://bbs.hcbbs.com/thread-5698533-1-1.html (Source: Haichuan Chemical Forum)
【Ten Years of Rapid Development in Chemical Equipment】From 2001 to 2025, the bypass valve for the central tube of the waste heat recovery unit in ammonia synthesis plants, developed under the leadership of Ningxia Petrochemical, was successfully manufactured domestically. https://bbs.hcbbs.com/thread-5698562-1-1.html (Source: Haichuan Chemical Industry Forum)
【Ten Years of Rapid Development in Chemical Equipment】The first domestic project for producing hydrogen from coke oven gas using pressure swing adsorption (PSA) technology was successfully put into operation between 2023 and 2025. https://bbs.hcbbs.com/thread-5698597-1-1.html (Source: Haichuan Chemical Industry Forum)