Submit

Mondur® MA 2903

allophanate-modified MDI polyether prepolymer; NCO: approx. 19 Wt. %; Viscosity: approx. 400 mPa·s @ 25°C

Contact expert Request a sample Request a quote
i
Market Switch
Selection will influence the results you get.
Copied to clipboard

About

Product Types

  • MMDI

Material

No data available

General Characterization

Mondur MA 2903 is an isocyanate-terminated (MDI) prepolymer based on allophanate modified 4,4’-diphenylmethane-diisocyanate (MDI).

Storage Conditions

Mondur MA 2903 prepolymer must be stored in tightly closed containers and protected from contamination with moisture and foreign materials, which can adversely affect processing. It will react slowly with water to form ureas and carbon dioxide gas, which may cause sealed containers to expand and rupture. Partially filled containers should be blanketed with dry nitrogen. Recommended storage temperatures should be maintained between 24° to 38°C (75° to 100°F). Within this range, a storage temperature of about 25°C (77°F) will maximize the storage life of this product.
Mondur MA 2903 prepolymer must not be allowed to freeze. Exposure to temperatures less than 15°C (59°F), even for short periods of time, can result in the formation of solid material. During the winter months, appropriate precautions must be taken during shipment and storage. Prolonged storage of solid or partially solid Mondur MA 2903 prepolymer may result in the formation of MDI dimer in amounts which exceed its solubility in the product at normal storage temepratures. This can make the product unusable. If solids should form because of exposure to low temperatures, it may be possible to reliquify Mondur MA 2903 by heating. Use a well-ventilated oven for the minimum time necessary to render it clear. The temperature of the product should not exceed 60°C (140°F). Agitation or drum rollers are recommended to avoid excessive local heating, which will degrade the product.
Significant amounts of MDI dimer may form during the heating process. As a result, the remelted diisocyanate may be cloudy, and the processing behavior and/or properties of the final product may be affected. Mondur allophanate modified diisocyanates may show a noticeable color increase during the shelf-life of the product. This is normal behavior for this material and this changes should not impact overall product performance. Following the recomm ... text to long! (max 2000 characters)

Sampling

No data available

Packaging Type

No data available

Technical Properties & Datasheets

Characteristics

Property Name Test Method Unit Value
Flash point PMCC °C > 93
Appearance Light yellow to yellow; clear to slightly turbid liquid
Viscosity at 25°C mPa•s 400
Specific gravity at 25°C 1.19

Downloads

Technical Data Sheet
Safety Data Sheet
No direct download available, please visit www.productsafetyfirst.covestro.com

Related topics

Do you want to know more about Mondur® MA 2903?
Get in touch with our experts!

How would you describe yourself?

What type of material are you interested in?

What type of industry are you interested in?

What type of inquiry is this?

How can we contact you?

* Mandatory Fields

{"FieldName":"","Endpoint":"https://covestro-prod-ffm.apimanagement.eu2.hana.ondemand.com/hybrispcm/products_typeahead?identKey=GB6LiyNSG0YYxXXEpmO8EyoUdFLN0Roi&max=5&lang=en&extended=true","Language":"en","PermissionQuery":"","BrandLabel":"Brand","ProductLabel":"Product","NoResultLabel":"No results for","MaxItem":10}
Request a sample
formVersion
{"FieldName":"productName","Endpoint":"https://covestro-prod-ffm.apimanagement.eu2.hana.ondemand.com/hybrispcm/products_typeahead?identKey=GB6LiyNSG0YYxXXEpmO8EyoUdFLN0Roi&max=5&lang=en&extended=true","Language":"en","PermissionQuery":"","BrandLabel":"Brand","ProductLabel":"Product","NoResultLabel":"No results for","MaxItem":10}

Request a sample

Hello! Thanks for reaching out to us.
We have received your request and one of our experts will be in touch with you as soon as possible.
In the meantime, feel free to discover our innovative material solutions!

Speak to you soon,
Your Covestro Team

Request a quote
formVersion
{"FieldName":"productName","Endpoint":"https://covestro-prod-ffm.apimanagement.eu2.hana.ondemand.com/hybrispcm/products_typeahead?identKey=GB6LiyNSG0YYxXXEpmO8EyoUdFLN0Roi&max=5&lang=en&extended=true","Language":"en","PermissionQuery":"","BrandLabel":"Brand","ProductLabel":"Product","NoResultLabel":"No results for","MaxItem":10}

Request a quote

Hello! Thanks for reaching out to us.
We have received your request and one of our experts will be in touch with you as soon as possible.
In the meantime, feel free to discover our innovative material solutions!

Speak to you soon,
Your Covestro Team

Compare