MDI (ester of cyanic acid of different of M of M phenyl firedamp and its homologue) the main raw material that is manufacturing polyurethane, basically use at freezer, refrigeratory..

• MDI（M苯基甲烷M异氰酸酯及其同系物）是生产聚氨酯的主要原料，主要用于电冰箱、冷库...