406597

Poly[(phenyl isocyanate)-co-formaldehyde]

average M_n ~400

• Synonym(s): PMDI, Polymethylene polyphenyl isocyanate
• Linear Formula: [C₆H₃(NCO)CH₂]_n
• CAS Number: 9016-87-9
• MDL number: MFCD00072953
• UNSPSC Code: 12162002
• PubChem Substance ID: 24865388

Properties

• vapor density: 8.6 (vs air)
• form: liquid
• specific activity: ~3.2 isocyanate groups/molecule
• mol wt: average M_n ~400
• refractive index: n20/D 1.634
• viscosity: 1,800 cP(25 °C)(lit.)
• bp: 392 °C/5 mmHg
• density: 1.2 g/mL at 25 °C (lit.)
• SMILES string: [H]C([H])=O.O=C=Nc1ccccc1

Description

General description

Poly[(phenyl isocyanate)-co-formaldehyde] (P-MDI) is a chain extender with one isocyanate group attached to each of the phenyl groups. It is a liquid polymer that is used to maintain uniformity in the cross-linking reaction between different polymeric units during the curing process. Its crosslinking sites (−NCO) allow it to be utilized in the preparation of polyurethanes.

Poly[(phenyl isocyanate)-co-formaldehyde] (PPIF) is an oligomer that can be used as a chain extender and a cross-linker that forms amide linkages (−NCO). It is highly reactive with hydroxyl groups, which facilitate the formation of a polyurethane network.

Application

P-MDI is an isocyanate that can be used in the preparation of polyurethane resins, films and foams. It can form mechanically robust films which are resistant to solvents and can be used as OTFT based electrodes in biomaterials based applications.

PPIF can be blended with a diol to form a polyurethane mixture with characteristic −NCO peaks. It can also be used as a cross-linker to form high tensile dielectric materials for potential application in organic electronics.

Features and Benefits

High viscosity, high functionality oligomer.

Safety Information

• Pictograms: GHS08,GHS07
• Signal Word: Danger
• Hazard Statements: H315,H317,H319,H332,H334,H335,H351,H373
• Precautionary Statements: P202 - P260 - P280 - P302 + P352 - P305 + P351 + P338 - P308 + P313
• Hazard Classifications: 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
• Target Organs: Respiratory system, Respiratory system,Eyes,Lungs
• Storage Class Code: 10 - Combustible liquids
• WGK: WGK 1