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
Desmodur XP 2551 is an aromatic polyisocyanate based on diphenylmethane diisocyanate.As a hardener primarily for polymeric concrete.
Applications
Desmodur XP 2551 can combined with polyols such as Desmophen® 5028 GT, 1380 BT or castor oil based polyols. Depending on the Desmophen product used, the coatings yielded can be varied from hard to flexible. It is necessary to add moisture scavengers to the polyol component to prevent the undesired reaction of Desmodur XP 2551 with water. Systems formulated with Desmodur XP 2551 are suitable for coating concrete, asphalt, fibrous cement and plastics.
Form supplied
Brown low-viscosity liquid
Specification
| Property | Test Condition | Value | Unit | Standard |
|---|---|---|---|---|
| NCO content | 32 ± 0,4 | % | ||
| Viscosity | at 25°C | 65 ± 10 | mPa∙s | |
| Acidity (HCl) | 415 ± 65 | mg/kg |
Typical Values
| Property | Test Condition | Value | Unit | Standard |
|---|---|---|---|---|
| Equivalent weight | approx. 131 | |||
| Flash point | approx. 220 | °C | ||
| Density | at 20°C | approx. 1,23 | g/ml |
Solubility / thinnability
Compatibility
Desmodur XP 2551 is compatible with numerous hydroxyl-bearing polyesters and polyethers, however compatibility should be tested by the user.
Storage
Desmodur XP 2551 should be stored in tightly sealed original containers and protected from moisture, heat, and foreign materials. Processibility of this product can be adversely affected by contamination. Recommended storage temperature is 10º-30ºC.
Storage time
Desmodur XP 2551 has a shelf life of six months from date of receipt at customer, provided the material is stored in sealed original containers at the recommended storage temperature.
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.
Trial or development Product
This is a trial product. Further information, including amended or supplementary data on hazards associated with its use, may be compiled in the future. For this reason no assurances are given as to type conformity, processability, long-term performance characteristics or other production or application parameters. Therefore, the purchaser/user uses the product entirely at his own risk without having been given any warranty or guarantee and agrees that the supplier shall not be liable for any damage, of whatever nature, arising out of such use. Commercialisation and continued supply of this material are not assured. Its supply may be discontinued at any time.
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 .
