Shanghai Songxuan New Materials Co., Ltd. (Songxuan) is a Chinese company based in Shanghai, specializing in the production of new materials for the chemical industry. The firm is known for manufacturing chemical products, including water-based grades of polycarbonate diol, a key intermediate used in polyurethanes and coatings.
In March 2026, Asahi Kasei filed a patent infringement lawsuit against Songxuan and Huizhou Changlong Chemical Co., Ltd. at the Shanghai Intellectual Property Court, seeking an injunction on manufacturing and sales activities and damages related to Asahi Kasei's Chinese patents on Duranol™ polycarbonate diol.
