Covestro certifies that the product meets specifications for 6 months from the date of shipment, provided it is stored and handled in accordance with the conditions specified in the ‘Storage’ section. After this period, product performance is not assured; Customers are responsible for retesting material before use. Covestro assumes no liability for product performance after 6 months.
Product description
Desmodur® VK 5 is a mixture of diphenylmethane-4,4'-diisocyanate (MDI) with isomers and higher functional homologues (PMDI).
Desmodur® VK 5 is a mixture of monomeric polyisocyanates that is suitable for combination with Baycoll® in the formulation of adhesives.
Applications
Desmodur® VK 5 can be combined with Baycoll in the formulation of adhesives for bonding many materials, e.g. wood, metal and plastics. Desmodur® VK 5 is particularly suitable for combining with Desmophen® and Baycoll® in the formulation of reactive two-component adhesives and moisture-curing one-component adhesives.
On account of the high vapor pressure of Desmodur® VK 5, adhesives with free isocyanate groups can only be handled in work areas with adequate extraction.
Form supplied
Dark brown liquid of low viscosity at temperatures above 10 °C that may partially crystallize at lower temperatures
Specification
| Property | Test Condition | Value | Unit | Standard |
|---|---|---|---|---|
| Acidity | ≤ 600 | mg/kg | MDI-01-03 | |
| Dynamic viscosity | 25 °C | 15 - 30 | mPa·s | MDI-01-02 |
| Pot life | 25 - 35 | min | MDI-01-18 | |
| NCO content | 31.5 - 33.5 | % | MDI-01-01 |
Typical Values
| Property | Test Condition | Value | Unit | Standard |
|---|---|---|---|---|
| Density | 20 °C | 1.22 | g/cm³ | DIN 51757 |
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.
Detailed information on safe handling, transport and storage of isocyanates is given in the guidelines of the ISOPA association.
Storage time
Processing
Desmodur® VK 5 may partially crystallize at temperatures below 10 °C. However, this may by reversed. The crystalline deposits can be reliquefied by careful heating to 70 °C for as briefly as possible, although this may cause an increase in the solids content.
It must be ensured that the containers - including those that are empty - are kept sealed. Above all, contact with water must be prevented as it reacts with Desmodur® VK 5 to form polyureas and carbon dioxide. During storage, sample withdrawal, transfer and processing of Desmodur® VK 5, the ingress of water in any form (damp containers, anhydrous 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 in Desmodur® VK 5 may cause turbidity and possibly solid deposits which may then block filters, pumps and pipelines.
Health and Safety Information
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.
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 .
