Before working with this product, you must read and become familiar with the available information regarding its risks, proper use, and safe handling. This information is provided in various formats, including the current Safety Data Sheet (SDS) and product label. SDS can be accessed via the following link:
Safety Data Sheets (SDS) for Covestro products | Covestro
For further questions, please use the contact information provided on this technical data sheet.
Product description
Applications
DESMODUR® SWN is a liquid, modified mixture of diphenylmethane-4,4';-diisocyanate (MDI) with isomers and homologues of higher functionality. It can be used in combination with polyols for the production of polyurethanes.
Sampling
Moisture ingress should be prevented when taking product samples.
Specification
| Property | Test Condition | Value | Unit | Standard |
|---|---|---|---|---|
| NCO-content | 28,7 - 29,3 | % by wt. | MDI-01-01 | |
| Viscosity | 25°c | approx. 70 | mPas | MDI-01-02 |
| Density | 23°C | approx. 1,22 | g/cm3 | calculated |
| Colour | brown | |||
| Odour | neutral, musty |
Storage
Storage temperature: 15 - 30 °CShelf life: 6 monthsLike all isocyanates, DESMODUR® SWN reacts with water and should therefore be protected against moisture. The product is also sensitive to frost and may undergo partial crystallisation if exposed to temperatures below 0°C.
Processing
DESMODUR® SWN can be used for a number of polyurethane applications and reacted with various polyol formulations.Desmodur® containers - including empty ones - should always be kept tightly sealed. It is absolutely essential that water (which reacts with DESMODUR® SWN to form polyureas, giving off carbon dioxide) is excluded from the containers. During storage, transfer to other containers and processing of DESMODUR® SWN, therefore, the access of water in any form (damp containers, aqueous solvents, moist air) must be prevented, otherwise carbon dioxide will evolve and produce a dangerous increase in pressure in the tanks and containers. In addition to this, any polyureas forming in DESMODUR® SWN will cause turbidity and possibly precipitation of solids, leading to blockages in the filters, pumps and pipelines of the foaming equipment.
Health and Safety Information
Disclaimer
Responsibility and Liability
The use of Covestro products, technical assistance, and information (regardless of how provided) is outside Covestro’s control and is solely the responsibility of the customer. The customer must conduct adequate testing to determine the suitability of products for its intended use, including but not limited to technical, health, safety, and environmental aspects. Unless otherwise agreed in writing, all products are sold exclusively under Covestro’s standard conditions of sale, which prevail in case of conflict and are available upon request.
The terms and conditions of sale and delivery are available via the following link:
https://order.covestro.com/covestrostorefront/saleConditions
All information is provided “as is” without warranties, express or implied, including merchantability or fitness for a particular purpose, and is subject to change without notice. To the maximum extent permitted by law, Covestro disclaims, and the customer assumes all liability for losses, damages, or claims arising out of use of Covestro products, technical assistance, or information. Any statement or recommendation not expressly contained in Covestro documentation is unauthorized and shall not bind Covestro. Nothing herein shall be construed as encouraging or recommending the use of any product in conflict with any claim of any patent. No license is implied or in fact granted under the claims of any patent.
Restrictions on Regulated Applications
This product is not intended for use in regulated applications such as agriculture, cosmetics, drinking water contact, food contact, medical products (e.g., medical devices), toys, or similar uses subject to specific regulatory requirements. Prior written approval from Covestro is required before this product may be used in any regulated application. The customer is solely responsible for ensuring compliance with all applicable laws and determining product suitability. Covestro disclaims all liability and warranties for unauthorized regulated uses.
Typical Value
The values provided are typical only and do not represent binding specifications. Unless expressly confirmed in a written contract, these values are not part of the contractual quality agreement and must not be relied upon as a warranty or guarantee of product performance.
Sample
Samples provided by Covestro are intended solely for evaluation and testing purposes by the customer and may not be used in commercial applications, resold, transferred to third parties (except qualified testing service providers acting on behalf of the customer), reverse engineered, modified, or used in any manner not explicitly authorized in writing by Covestro. Samples are provided ‘as-is’ without any warranties, express or implied, including fitness for a particular purpose. Customers are solely responsible for ensuring safe handling, regulatory compliance, and suitability of the material for their intended evaluations. Covestro disclaims all liability for damages or losses arising from the use of samples.
Contact Information
Please use our contact form or contact us directly by sending an e-mail to technical-datasheets@cx.covestro.com .
