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.
Product description
Applications
DESMODUR VP.PU 0118 LIQUID is a monomeric diphenylmethane-4,4'-diisocyanate with a molecular weight of 250 g/mol. At room temperature the product takes the form of a white to light yellow solid.It can be used in conjunction with polyols for the production of polyurethane products.
Sampling
Moisture access should be prevented.
Specification
| Property | Test Condition | Value | Unit | Standard |
|---|---|---|---|---|
| 4,4'-isomer content | min. 98,2 | % by wt. | MDI-01-06 | |
| Purity ( mol. wt. 250 ) | ≥ 99,5 | % by wt. | MDI-01-01 | |
| 2,4'-isomer content | max. 1,8 | % by wt. | MDI-01-06 | |
| NCO-content (theoretical) | 33,6 | % by wt. | ||
| Freezing point | ≥ 38,4 | °C | MDI-01-17 | |
| Hydrolysable chlorine | max. 50 | ppm | MDI-01-04 | |
| Phenylisocyanate-content | ≤ 10 | ppm | MDI-01-09 | |
| Uretdione (dimer) content * | max. 0,1 | % by wt. | MDI-01-08 | |
| Viscosity at 40 °C | 4,1 | mPa*s | MDI-01-02 | |
| Density at 40 °C | 1,19 | g/cm3 | DIN 51757 | |
| Specific heat (cp) | approx. 1,39 | kJ/kg*K | ||
| Heat of fusion | approx. 102 | J/g |
Storage
Recommended storage temperature: 43 ± 2 °C (in a steel tank)Protect from moisture, heat and foreign material.Covestro represents that, for a period of ≤ 3 weeks following the day of shipment as stated in the respective delivery documents, the product will meet the values set forth in section "specification" above provided that the product is stored in full compliance with the storage conditions and is otherwise handled appropriately.The lapse of this period does not necessarily mean that the product no longer meets specifications. However, prior to using said product, Covestro recommends to test such a product if it still meets the specifications. Covestro does not make any representation regarding the product after the period and Covestro shall not be responsible or liable in any way for the product failing to meet specifications after the period.Like all isocyanates, DESMODUR VP.PU 0118 LIQUID is sensitive to moisture and reacts with water to form insoluble urea derivatives and carbon dioxide. The generation of carbon dioxide in sealed containers can lead to a dangerous build-up of pressure. Contact with air, especially if accompanied by simultaneous exposure to light, accelerates yellowing ofDESMODUR VP.PU 0118 LIQUID. It is therefore advisable to store liquid DESMODUR VP.PU 0118 LIQUID under dry nitrogen. Yellowing generally has no effect on the product's processing behaviour, however.DESMODUR VP.PU 0118 LIQUID is sensitive to heat and likely to dimerization (uretdione formation).The solid product dimerizes more rapidly at room temperature than the liquid product stored at 43 °C. Crystallized DESMODUR VP.PU 0118 LIQUID should therefore be stored at temperatures below 5 °C and melted rapidly but gently before use. Although the rate of dimerization decreases as the temperature drops, storage stability is still limited even at temperatures below 5 °C.
Processing
It must be ensured that the containers - including empty tanks and containers - are kept sealed.Above all, contact with water must be prevented as it reacts withDESMODUR VP.PU 0118 LIQUID to form polyureas and carbon dioxide. During storage, sample withdrawal, transfer and processing ofDESMODUR VP.PU 0118 LIQUID, the ingress of water in any form (damp containers, aqueous solvents, moist air) must be prevented as otherwise the formation of carbon dioxide may cause a dangerous increase in pressure in the tanks and containers. Furthermore, the formation of polyureas inDESMODUR VP.PU 0118 LIQUID may cause turbidity and possibly solid deposits which may then block filters, pumps and pipelines.
Health and Safety Information
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.
Medical Grades
All products for medical applications/Baymedix® products offered by Covestro are supplied under contract containing detailed product specifications and therefore the execution of an individual written supply contract is mandatory prior to any use of a medical applications/Baymedix® product, including but not limited to production of medical devices or medicinal products.
For more information, please refer to the Guidance on the use of Covestro products in Medical Applications:
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 .
