Research Progresses in Synthesis of Polyimide Polymers and Their Applications in Coatings

With the development of technology，there is an increasing interest and demand for high-performance polymers in the coating field.Polyimide polymers，the materials at the top of the polymer pyramid，should play a certain role in the coating field.Polyimide polymer coatings，often used as thermal protection layer，waterproof and moisture resistant layer，radiation resistant layer and other isolation layers due to their special structure，are widely used in aerospace，electronics，machinery manufacturing，construction and other industries.In this paper，the synthesis method of polyimide polymers (PI，PAI，PEI) was introduced.And the research and development of high performance polymers(PI，PAI，PEI) in coatings in recent years were emphatically described.Finally，the problems and challenges faced by the high performance polyimide coating materials at the present stage and the future development direction were proposed.