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 70WF48 is a mixture of modified diphenylmethane-4,4'-diisocyanate (MDI) with isomers and homologues of higher functionality used for the production of flexible polyurethane cold-curing molded foam for automotive seating. At room temperature the product is a brownish black liquid.
Specification
| Property | Test Condition | Value | Unit | Standard |
|---|---|---|---|---|
| Density 25 °C | 1,21 | g/cm3 | DIN 51757 | |
| NCO content | 29,3 - 30,1 | % by wt. | 2011-0248603-94 | |
| Viscosity 25 °C | 50 - 80 | mPa*s | 2011-0313703-95 | |
| Acidity | ≤ 100 | ppm | 2011-0461102-96 |
Storage
Recommended storage temperature (°C) 20 - 40Shelf life 6 months if stored in sealed moisture-tight containers
Processing
Prolonged exposure to excessively high temperatures may cause insoluble precipitates to form. Temperatures below 15°C, on the other hand, lead to crystallization. If drums containing crystallized Desmodur® VP.PU 70WF48 are carefully warmed to a maximum of 70°C, however, the material will return to the liquid state, although this may lead to an increase in the solids content. Once the product has been reliquefied, the contents of the drums must be homogenized.Desmodur® containers - including empty ones - should always be kept tightly sealed. It is absolutely essential that water (which reacts with Desmodur® VP.PU 70WF48 to form polyureas, giving off carbon dioxide) be excluded from the containers. During storage, transfer to other containers and processing of Desmodur® VP.PU 70WF48, 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® VP.PU 70WF48 will cause turbidity and possibility precipitation of solids, leading to blockages in the filters, pumps and pipelines of the foaming equipment.
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.
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 .
