Covestro represents that the product will meet the specifications or values set forth in section "specifications or typical value" above, whatever is applicable, until the expiry date mentioned on the Certificate of Analysis provided that the product is stored in full compliance with the storage conditions set forth in and referenced under section "storage" above and is otherwise handled appropriately. The expiry date is typically 6 months (180 days) after last quality control unless specified otherwise on the Certificate of Analysis. If the expiry date is met it does not necessarily mean that the product no longer meets specifications or the set values. However, prior to using said product, Covestro recommends testing such a product if it still meets the specifications or the set values. Covestro does not make any representation regarding the product after the expiry date is met and Covestro shall not be responsible or liable in any way for the product failing to meet specifications or the set values after the expiry date is met.
Product description
Mondur MA 2300 is an allophanate modified 4,4’-diphenylmethane diisocyanate (MDI).
Applications
Mondur® MA 2300 diisocyanate can be used as a raw material for the preparaion of urethane foams, coatings, sealants and adhesives. As with any product, use of Mondur® MA 2300 in a given application must be tested (including but not limited to field testing) in advance by the user to determine suitability.
Specification
| Property | Test Condition | Value | Unit | Standard |
|---|---|---|---|---|
| NCO content | 22.7 - 23.3 | % | M105 - ISO 11909 |
Typical Values
| Property | Test Condition | Value | Unit | Standard |
|---|---|---|---|---|
| Color | yellow | |||
| Flash point | 430 | °C | Pensky-Martens Closed Cup (ASTM D-93) |
| Property | Test Condition | Value | Unit | Standard |
|---|---|---|---|---|
| Appearance | Light yellow to yellow liquid | |||
| Specific gravity | at 25°C | 1.2 | ||
| Flash point | PMCC | 93 | °C | |
| Equivalent weight | avg. | 180 | ||
| Viscosity | at 25°C | 500 | mPa•s | |
| Functionality | 2.0 |
Storage
Mondur® MA 2300 diisocyanate 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. Storage temperatures should be maintained between 10° to 30°C (50° to 86°F). Within this range, a storage temperature above 20°C (68°F) will maximize the storage life of this product.
Mondur® MA 2300 diisocyanate must not be allowed to freeze. Exposure to temperatures less than 0°C (32°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 2300 diisocyanate 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 2300 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 recommended storage temperature, as stated on the PIB, and minimizing the storage time will minimize the color increase.
Storage time
Health and Safety Information
Before working with this product, you must read and become familiar with the available information on its risks, proper use, and handling. Information is available in several forms, e.g., in particular in the currently valid safety data sheets and product labels. For further information contact your Covestro representative.
Disclaimer
General
The manner in which you use our products, technical assistance and information (whether verbal, written or by way of production evaluations), including any suggested formulations and recommendations, are beyond our control. Therefore, it is imperative that you test our products to determine suitability for your processing and intended uses. Your analysis must at least include testing to determine suitability from a technical, health, safety, and environmental and regulatory standpoint. Such testing has not necessarily been done by Covestro, and Covestro has not obtained any approvals or licenses for a particular use or application of the product.
Unless we otherwise agree in writing, all products are sold strictly pursuant to the terms of our standard conditions of sale which are available upon request.
All information and including technical assistance is given without warranty or guarantee and is subject to change without notice. It is expressly understood and agreed by you that you assume and hereby expressly release indemnify us and hold us harmless from all liability, in tort, contract or otherwise, incurred in connection with the use of our products, technical assistance, and information. Any statement or recommendation not contained herein is unauthorized and shall not bind us. Nothing herein shall be construed as a recommendation to use any product in conflict with any claim of any patent relative to any material or its use. No license is implied or in fact granted under the claims of any patent.
Non Medical and non Food Contact
This product is not designated for the manufacture of a medical device or of intermediate products for medical devices (1). This product is also not designated for other specifically regulated applications (e.g. including cosmetics, plant protection, fertilisers, plant strengtheners, food processing, food contact and others). If the intended use of the product is for the manufacture of a medical device or of intermediate products for medical devices or for other specifically regulated applications Covestro must be contacted in advance to provide its agreement to sell such product for such purpose. Nonetheless, any determination as to whether a product is appropriate for use in a medical device or intermediate products for medical devices, for Food Contact products or cosmetic applications must be made solely by the purchaser of the product without relying upon any representations by Covestro.
1) Please see the Guidance on Use of Covestro Products in a Medical Application document.
Sample
Any samples provided by Covestro are for testing purposes only and not for commercial use.
Typical value
These values are typical values only. Unless explicitly agreed in written form, they do not constitute a binding material specification or warranted values
Contact
Please use our contact form or contact us directly by sending an e-mail to technical-datasheets@cx.covestro.com .
