A brief overview of the development of polyurethane in my country

my country’s polyurethane industry started Beganin the late 1950s. In 1958, Dalian Dyestuff Factory began to study toluene diisocyanate. In 1962, it built a toluene diisocyanate production device with an annual output of 500 tons, laying the foundation for my country’s polyurethane industry. In 1959, the Shanghai Light Industry Research Institute began research on polyurethane…