Product Introduction
Poly[methylene(polyphenyl) isocyanate] is a diisocyanate-diphenylmethane(MDI)-based composition containing some higher functionality isocyanates. The functionality is about 2.6-2.7. It is a brown liquid at ambient temperatures.
SPECIFICATIONS
|
Product Name： |
Poly[methylene(polyphenyl) isocyanate] ,Polymeric MDI,P-MDI |
|
CAS No.： |
9016-87-9 |
|
Structural formula: |
|
|
Appearance: |
Brown liquid |
Product brand
1.WANNATE PM-200：
|
Item |
Index |
|
Appearance |
Brown liquid |
|
Viscosity (25℃) /mPa•s |
150 ~ 250 |
|
Isocyanate content (-NCO) /% |
30.5 ~ 32.0 |
|
Density (25℃)/(g/cm3) |
1.220 ~ 1.250 |
|
Acidity /% |
≤0.030 |
|
Hydrolyzed chlorine / % |
≤0.20 |
2.BASF LUPRANATE M20S:
|
TEST ITEM/Method |
UNIT |
SPEC |
RESULT |
|
Viscosity at 25'CSBPC-INM-P/LA-205 |
mPa.s |
170-250 |
208 |
|
NCO content5BPC-INM-P/LA-202 |
%(w) |
30.5 -32.0 |
31.06 |
|
EHC SBPC-INM-P/LA-211 |
mg/kg |
Max.250 |
38 |
|
Appearance SBPC-INM-P/LA-209 |
/ |
Brown liquid |
Brown liquid |
3.COVESTRO Desmodur 44v20l:
|
TEST ITEM |
Method |
RESULT |
SPEC |
Unit |
|
Isocyanate content (-NCO) |
MDI-01-01 |
31.4 |
30.5 -32.5 |
% |
|
Viscosity (25℃) |
MDI-01-02 |
180 |
160 ~ 240 |
mPa•s |
|
Acidity |
MDI-01-03 |
≤100 |
≤200 |
% |
Product Application
Polymeric MDI can be widely used in the production of rigid PU foam heat-insulating materials; also used in isocyanurate foam, paints, adhesives, structural foam, cellular integral skin foam, automotive bumper and interior parts, high-resilience foam and synthetic wood, etc. Due to its unique composition structure, Polymeric MDI can provide better flowability. It is, therefore, particularly suitable for the production which require strict flowability of systems.
Product Package
210L iron drums, 250kg/drum
FAQ
1. How to store Polymeric MDI?
Polymethylene polyphenylene isocyanate is a reactive chemical, reaction with atmospheric moisture happens easily and leads to the formation of insoluble ureas and carbon dioxide gas, which can result in pressure build-up in closed containers and viscosity increase of the product. Containers must therefore be absolutely dry and carefully sealed after congested with nitrogen.
Containers of P-MDI should be kept properly closed and stored indoors at ambient temperature (15-35℃) in a well-ventilated area. Storage at low temperature (below 5℃) may lead to some crystallization; this material must, therefore, be protected from frost.
2. What should we do if crystallization does occur?
If crystallization does occur, the material should be heated by rolling the drum in a hot air oven at 70-80℃ to melt it out, and should then be thoroughly agitated before use. Melting in a water bath is not recommended. Extended storage at temperatures above 50℃ is not recommended to prevent from the formation of insoluble solids and viscosity increase.
3. What are the requirements for the ambient temperature of storage?
Extended storage at temperatures above 50℃ is not recommended to prevent from the formation of insoluble solids and viscosity increase.
4.How long is the expiration date of P-MDI?
Under recommended storage conditions, the shelf life of P-MDI is one year since the date of production.
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