China successfully opened a new process for polyimide synthesis
Simplify reaction steps, reduce waste emissions, and reduce production costs
Recently, the project "Process for the direct synthesis of polyimide and its products from chlorophthalic anhydride" completed by Changchun Yinghua Institute of the Chinese Academy of Sciences passed the expert appraisal organized by the Science and Technology Department of Jilin Province. The expert committee believes that this new processing technology has changed the traditional method of polyimide synthesis, opening up a new reaction path, and the overall technology is at the leading level in China.
According to reports, polyimide is a kind of heat-resistant polymer material developed by the United States and the former Soviet Union in the 1950s. After half a century of development, the world's output has reached 20,000 to 30,000 tons, and there are more than 10 commercial varieties. It has been widely used in aviation, aerospace, microelectronics, electrical insulation, machinery, separation membranes, etc. It is "the expert in solving problems." In the field of microelectronics, "there is no modern high-integration microelectronics industry without polyimide." People pay more and more attention to the future development of polyimide.
Changchun Yinghua of the Chinese Academy of Sciences has accumulated more than 40 years of research and development in polyimide, and more than 30 invention patents including US patents have been obtained. In 2001, with the support of the Science and Technology Department of Jilin Province, they undertook the project â€œProcess for the Direct Synthesis of Polyimide and Its Products from Chlorophthalic Anhydrideâ€. After nearly five years of hard work, they have opened up a new way of polyimide synthesis, which has made a large technological breakthrough in the viscosity and strength of polyimide.
The reaction step of synthesizing polyimide from chlorophthalic anhydride is simplified from the original six steps to two steps, thereby greatly reducing the amount of auxiliary reagents and solvents used, reducing waste emissions, reducing process consumption, and reducing polyamido. The production cost of amines. On this basis, the polyimide products made by this processing technology have been successfully applied in high-tech fields such as generator sets, air compressors, tobacco packaging machinery, and transmission pump seals. In order to open up a wider range of applications, the researchers conducted pilot and pilot production on equipment such as automotive brake friction materials and compressed air dehumidification membrane modules. All of the polyimide products have fully met the requirements for use. Provide effective process and technical support for the industrial production of products.
It is also known that at present, there are no reports in other research institutes on the direct synthesis of polyimide. The implementation of this technology will significantly reduce the cost of certain polyimides that are particularly sensitive to cost requirements, and the overall measurement will reduce the production cost of polyimide by more than 30%. It not only lays a solid foundation for the development of the application market of high-performance polymer materials, but also enhances the international competitiveness of the polyimide industry in China, expands the application range of polyimide, and drives the corresponding industry fields. Technology upgrades and market competitiveness.