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 .

A polymethylene polyphenylisocyanate that contains MDI. This product has a narrow molecular weight distribution and a high reactivity. Applicable to many foam processes, this product is compatible with rigid polyether and polyester polyols, making it suitable for a full range of low- to high-density semi-rigid foams, rigid foams and structural ...

Diphenylmethane diisocyanate (MDI) is a member of the diisocyanate family associated with polyurethane chemistry. The term polyurethane applies to a large number of polymers formed through the polyaddition of polyfunctional isocyanates and …

Throughout this brochure the term MDI is used to include both MDI and polymeric MDI. 1. Identifying MDI. Diphenylmethane diisocyanate, commonly referred to as MDI, is a white to yellowish solid at room temperature with no odor. Polymeric MDI, which is most commonly used, is a mixture of MDI and polymeric MDI and is. slight odor.

pure monomeric 4,4'-methylene diphenyl isocyanate (MDI) (CAS number 101–68–8, EC number 615–005–00–9), at temperatures up to 38 °C a whitish-yellow solid which is used in the industrial production of special plastics, varnish and glue components, moulding elastomers and "MDI prepolymers" (reaction products with polyester or polyether ...

2021年4月19日 · US EPA Integrated Risk Information System: Methylene Diphenyl Diisocyanate (monomeric MDI) and polymeric MDI (PMDI) (CASRN 101-68-8, 9016-87-9). Baur, X.: Hypersensitivity pneumonitis (extrinsic allergic alveolitis) induced by isocyanates.

‘Polymeric MDI’ The principal material of commerce is not pure 4,4′-methylenediphenyl diisocyanate but is a mixture containing 4,4′-methylenediphenyl diisocyanate, other methylenediphenyl diisocyanate isomers, and low oligomers of …

mdi是由异氰酸酯与多元醇及其配合助剂合成的聚氨酯材料，以其优异的性能、繁多的品种、广阔的用途，在众多的合成材料中独树一帜，成为当今发展速度最快的材料之一。

A polymethylene polyphenylisocyanate that contains MDI. This product has a high functionality and a relatively high viscosity. Recommended for use in polyisocyanurate rigid foams, this product imparts good resistance to heat distortion, excellent strength properties at low densities and improved humid age stability.

2024年6月1日 · PMDI，全称为 "polymeric MDI (methylene di isocyanate)"，在中文中简称为“聚合MDI（二异氰酸酯）”。 这个英文缩写词主要应用于塑料领域，表示一种聚合物二异氰酸酯。 它在工业中具有广泛的用途，特别是在泡沫塑料、胶粘剂和涂料等产品的制造中。 在技术术语中，PMDI的中文拼音是 "jù hé èr yì qíng suān zhǐ"，其英文原词的完整形式是polymeric MDI，它是一种由多个分子组成的MDI（二异氰酸酯）化合物。 在英语使用中，尽管不是特别常见，但其 …