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Merck

256439

Sigma-Aldrich

4,4′-Methylenebis(phenyl isocyanate)

98%

Sinónimos:

4,4′-MDI, Bis(4-isocyanatophenyl)methane

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About This Item

Fórmula lineal:
CH2(C6H4NCO)2
Número de CAS:
Peso molecular:
250.25
Beilstein:
797662
Número CE:
Número MDL:
Código UNSPSC:
12162002
ID de la sustancia en PubChem:
NACRES:
NA.23

Nivel de calidad

Ensayo

98%

Formulario

solid

idoneidad de la reacción

reagent type: cross-linking reagent

bp

200 °C/5 mmHg (lit.)

mp

42-45 °C (lit.)

densidad

1.18 g/mL at 25 °C (lit.)

temp. de almacenamiento

−20°C

cadena SMILES

O=C=Nc1ccc(Cc2ccc(cc2)N=C=O)cc1

InChI

1S/C15H10N2O2/c18-10-16-14-5-1-12(2-6-14)9-13-3-7-15(8-4-13)17-11-19/h1-8H,9H2

Clave InChI

UPMLOUAZCHDJJD-UHFFFAOYSA-N

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Descripción general

4,4′-Methylenebis(phenyl isocyanate) (MDI) is an aromatic diisocyanates class of monomer that is widely used in the production of polyurethane plastics, foam insulation, coatings, adhesives, and sealants. It is highly reactive due to the presence of two isocyanate functional groups. MDI is known for its excellent strength, durability, and resistance to chemical and environmental damage, which makes it useful in resin composition, lithographic printing plates, coating films, optical films, image display devices, semiconductor devices, and polyurethane foam production.

Aplicación

4,4′-Methylenebis(phenyl isocyanate) can be used as a starting material to synthesize:
  • Polyurethane cationomers, that are applicable in medical implants.
  • A prepolymer for preparing self-healable polyurethane elastomers.
It can also be used as a cross-linking agent to synthesize PEBA (polyether-block-amide) copolymer with improved mechanical properties, which are mainly used in soles, medical tubes, aerospace parts, and chemical separation. Additionally, MDI is also used as a crosslinker to covalently modify graphene oxide (GO) and enhance the corrosion resistance of polystyrene coatings. The resultant polystyrene/GO-MDI composite coatings showed superior corrosion resistance to unmodified polystyrene coatings. This approach can potentially be used to improve the durability of materials in various industrial and biomedical applications.

Pictogramas

Health hazardExclamation mark

Palabra de señalización

Danger

Clasificaciones de peligro

Acute Tox. 4 Inhalation - Carc. 2 - Eye Irrit. 2 - Resp. Sens. 1 - Skin Irrit. 2 - Skin Sens. 1 - STOT RE 2 Inhalation - STOT SE 3

Órganos de actuación

Respiratory system

Código de clase de almacenamiento

11 - Combustible Solids

Clase de riesgo para el agua (WGK)

WGK 1

Punto de inflamabilidad (°F)

411.8 °F - closed cup

Punto de inflamabilidad (°C)

211 °C - closed cup

Equipo de protección personal

dust mask type N95 (US), Eyeshields, Faceshields, Gloves


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The aim of the study was to analyze the data obtained during the diagnostic process and their real values in the final diagnosis of patients exposed to diisocyanates amd suspected of occupational allergic disease of the respiratory system The patients

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