Methylene diphenyl diisocyanate (MDI) is an aromatic diisocyanate. Three isomers are common, varying by the positions of the isocyanate groups around the rings: 2,2′-MDI, 2,4′-MDI, and 4,4′-MDI .

MDI是4,4' 二苯基甲烷二异氰酸酯 （纯MDI）、含有一定比例纯MDI与 多苯基多亚甲基多异氰酸酯 的混合物（聚合MDI）以及纯MDI与聚合MDI的改性物的总称，是生产 聚氨酯 最重要的原料，少量MDI应用于除聚氨酯外的其它方面。 聚氨酯既有 橡胶 的弹性，又有塑料的强度和优异的加工性能，尤其是在隔热、隔音、耐磨、耐油、弹性等方面有其它 合成材料 无法比拟的优点，是继 聚乙烯 、 聚氯乙烯 、 聚丙烯 、聚苯乙烯和 ABS 后第六大塑料（现已经超越ABS成为第五大塑 …

The commercial form of 4,4'-methylenediphenyl diisocyanate (MDI) is used to produce polyurethane foams. Acute (short-term) inhalation of high concentrations of MDI may cause sensitization and asthma in humans. Acute dermal contact with MDI has induced dermatitis and eczema in workers. MDI has been

2021年4月14日 · ACGIH: Documentation of the Threshold Limit Values (TLVs) and Biological Exposure Indices (BEIs) - Methylene Bisphenyl Isocyanate. See annual publication for most recent information. NIOSH: Occupational Health Guideline for …

2025年2月10日 · 日前，由中国科学院过程工程所联合陕煤技术开发中心、陕西煤业化工技术研究院合作开发的 尿素法非光气二苯基甲烷二异氰酸酯（MDI）绿色制备技术 顺利完成工业化试验装置全流程标定，试验期间装置运行稳定，数据良好，达到预期指标。 非光气异氰酸酯（MDI）绿色制备工业化试验装置. 关于 尿素法非光气MDI 绿色制备技术. 该项技术主要以苯胺、尿素和甲醛等大宗化学品为原料，采用非光气技术路线制备异氰酸酯（MDI），避免光气使用，从源头上减少 …

Harmonised classification and labelling is a legally binding classification and labelling for a substance, agreed at European Community level. Harmonisation is based on the substance’s physical, toxicological and eco-toxicological hazard assessment.

4,4′-Methylenebis (cyclohexyl isocyanate), mixture of isomers (HMDI) is an aromatic diisocyanate with good mechanical properties. It is light stable and is resistant to hydrolysis. It is majorly used in the synthesis of polyurethane. [1] [2]

亞甲基二苯基二異氰酸酯（英語： Methylene diphenyl diisocyanate ），通常縮寫為MDI，是一種芳族二異氰酸酯。 三種異構體是常見的，隨著環周圍的異氰酸酯基團的位置而變化：2,2'-MDI，2,4'-MDI和 4,4'-MDI 。

MDI has designed and installed numerous PLC, HMI, and SCADA power system control solutions for government and private critical facilities, medical facilities, and research laboratories. In general, services provided include:

Wannate® MDI 50 F by Borsodchem is a 50/50 blend of 4,4-MDI and 2,4-MDI. It is primarily used in the production of polyurethane elastomers and for polyurethane coatings, adhesives, and foams. Wannate MDI-50 provides better flowability for the production of injection molding and can be widely used in the production of various Polyurethane ...