Skip to Content
MilliporeSigma
All Photos(2)

Key Documents

View All Documentation

406597

Sigma-Aldrich

Poly[(phenyl isocyanate)-co-formaldehyde]

average Mn ~400

Synonym(s):

PMDI, Polymethylene polyphenyl isocyanate

Sign Into View Organizational & Contract Pricing
All Photos(2)

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

Looking for similar products? Visit Product Comparison Guide

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

signalword

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

10 - Combustible liquids

wgk_germany

WGK 1

Choose from one of the most recent versions:

Certificates of Analysis (COA)

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

Don't see the Right Version?

If you require a particular version, you can look up a specific certificate by the Lot or Batch number.

Search for a COA

Already Own This Product?

Find documentation for the products that you have recently purchased in the Document Library.

Visit the Document Library

Customers Also Viewed

Slide 1 of 1

1 of 1

Hexamethylene diisocyanate puriss., ≥99.0% (GC)

Sigma-Aldrich

52649

Hexamethylene diisocyanate

Highly cross-linked polyurethane with enhanced stability of second-order nonlinear optical properties.
Park C, et al.
Macromolecules, 28(10), 3713-3717 (1995)
Polyfunctional active coatings with damage-triggered water-repelling effect.
Latnikova A, et al.
Soft Matter, 7(2), 369-372 (2011)
Exploration on high performance polyamide 1010/polyurethane blends filled with functional graphene nanoplatelet: physical properties and technical application
Kausar A
Journal of the Chinese Advanced Materials Society, 5(2), 133-147 (2017)
Second-order nonlinear optical properties and relaxation dynamics of aligned cross-linked polyurethanes with hemicyanine-type chromophores.
Lee K, et al.
Journal of the Optical Society of America B: Optical Physics, 15(1), 393-400 (1998)
Biomaterials-based organic electronic devices.
Bettinger CJ and Bao Z
Polymer International, 59(5), 563-567 (2010)
View All Related Papers

Our team of scientists has experience in all areas of research including Life Science, Material Science, Chemical Synthesis, Chromatography, Analytical and many others.

Contact Technical Service