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406597

Sigma-Aldrich

Poly[(phenyl isocyanate)-co-formaldehyde]

average Mn ~400

Synonym(s):

PMDI, Polymethylene polyphenyl isocyanate

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About This Item

Linear Formula:
[C6H3(NCO)CH2]n
CAS Number:
9016-87-9
MDL number:
MFCD00072953
UNSPSC Code:
12162002
PubChem Substance ID:
24865388

vapor density

8.6 (vs air)

form

liquid

specific activity

~3.2 isocyanate groups/molecule

mol wt

average Mn ~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

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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.

Pictograms

Health hazardExclamation mark
GHS08,GHS07

Signal Word

Danger

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

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Certificates of Analysis (COA)

Lot/Batch Number
14908JR
13425LR
05230MR
04512LQ
00210CF

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