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  • Coatings, paints & inks

Desmodur® VH 20 N

Polyisocyanate based on diphenylmethane diisocyanate.In combination with polyols to formulate two-component coatings and sealing compounds and to manufacture prepolymers.

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About

Product Types

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Material

Coatings, paints & inks
Hard, Solvent-free, Flexible, Elastic

General Characterization

No data available

Storage Conditions

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Sampling

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Packaging Type

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Technical Properties & Datasheets

Product description

Polyisocyanate based on diphenylmethane diisocyanate.In combination with polyols to formulate two-component coatings and sealing compounds and to manufacture prepolymers.

Form supplied

yellow, solvent-free liquid

Specification

Property Test Condition Value Unit Standard
NCO 24,5 ± 0,5 % MDI-01-01
Viscosity 25 °C 280 ± 80 mPa*s MDI-01-02

Typical Values

Property Test Condition Value Unit Standard
Flash point approx. 195 °C DIN EN ISO 2719
Density at 20 °C approx. 1,21 g/ml DIN EN ISO 2811-2
Equivalent weight 173

Compatibility

Generally speaking, Desmodur® VH 20 N has good compatibility with most polyester, polyether and polyether ester polyols as well as with many flexibilisers and liquid extender resins. In cases of doubt, compatibility tests should be carried out.

Storage

- Storage in original sealed Covestro container. - Recommended storage temperature: 10 - 30 °C. - Protect from moisture, heat and foreign material. General information: The product is sensitive to moisture and should therefore be stored in its sealed original containers. Storage at higher temperatures may result in an increase in viscosity and at lower temperatures in the formation of crystalline deposits. The crystals can be remelted by heating the product gently. Warning If the recommended storage temperature is exceeded for a long period (especially if the temperature of the product rises to above 50 °C), or if the recommended shelf life is exceeded, or if the product comes in contact with water or bases such as amines, alkalis or metal compounds, a chemical reaction may take place. In addition to a reduction in the NCO content and an increase in viscosity, carbon dioxide in particular may be generated. The resultant increase in pressure may cause the containers to swell or burst. Consequently, if the product is mixed with other components or processed into a prepolymer, it is advisable to check the shelf life of the mixture or prepolymer.

Storage time

Covestro represents that, for a period of six months following the day of shipment as stated in the respective transport documents, the product will meet the specifications or values set forth in section "specifications or characteristic data" above, what ever is applicable, 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 lapse of the six months period does not necessarily mean that the product no longer meets specifications or the set values. However, prior to using said product, Covestro recommends to test such a product if it still meets the specifications or the set values. Covestro does not make any representation regarding the product after the lapse of the six months period and Covestro shall not be responsible or liable in any way for the product failing to meet specifications or the set values after the lapse of the six months period.

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.

The Product Safety First Program | Covestro

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 .

Downloads

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

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