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MDI(二苯基甲烷二异氰酸酯及其同系物),是生产聚氯酯的主要原料,其应用领域广泛,主要用于电冰箱、冷库、油田、集中供热等隔热保温的硬泡材料,以及高回弹、半硬泡和自结泡沫、粘合剂等制造业,其应用领域涉及机电、船舶、航空、汽车、建筑、纺织等行业部门。 MDI生产技术是高技术。20多年来,这项高技术一直为英、美、德、日等跨国公司所垄断。为改变中国MDI工业生产技术落后局面,1992年前后,国家计委曾先后批准了包括烟台万华合成革集团公司(原烟台合成革总厂)在内的4家国有企业各自引进一套年产2万吨MDI
MDI (diphenylmethane diisocyanate and its homologues) is the main raw material for the production of polychlorinated esters. It has a wide range of applications and is mainly used for heat-insulating foam materials such as refrigerators, cold storage, oil fields, and central heating. As well as manufacturing industries such as high-rebound, semi-rigid foam, and self-knotting foams and adhesives, its applications include the electromechanical, marine, aerospace, automotive, construction, and textile industries. MDI production technology is high technology. For more than 20 years, this high technology has been monopolized by multinational corporations such as the United Kingdom, the United States, Germany and Japan. In order to change the backwardness of China’s MDI industrial production technology, the State Development Planning Commission approved successively around 1992 that four state-owned enterprises, including Yantai Wanhua Synthetic Leather Group Co. (former Yantai Synthetic Leather Factory), introduced a set of annual production. 20,000 tons of MDI