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Desmodur® E 21300

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技术属性和数据表

Product description

Desmodur® E 21300 is a polyether-based aromatic polyisocyanate prepolymer based on diphenylmethane diisocyanate (MDI) with reduced residual monomer content.

Applications

Desmodur® E 21300 may be used:
(A) As a binder for the formulation of moisture-curing, one-component polyurethane adhesives (e.g. low-monomer 1K-PUR hotmelts)
(B) As a hardener for hydroxyl-bearing co-reactants for two-component polyurethane adhesives (e.g. low-monomer 2K-PUR adhesives)

Form supplied

Yellowish, high-viscosity liquid

Specification

Property Test Condition Value Unit Standard
NCO content 5,1 - 5,9 % M105 - ISO 11909
Dynamic viscosity 50 °C 6,000 - 10,500 mPa·s M014 - ISO 3219/A.3
Monomer content ≤ 0,15 % M136 - DIN 55672-1
Color Iodine ≤ 7,0 M017 - EN 1557

Storage

- Storage in original sealed Covestro container.

- Recommended storage temperature: 10 - 30 °C.

- Protect from frost/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 high temperatures will lead to an increase in viscosity and a reduction of the NCO content.

Storage time

Covestro represents that, for a period of 6 months (180 days) following the day of shipment as stated in the respective transport documents, the product will meet the specifications or values set forth in chapter "Specification" above, what ever is applicable, provided that the product is stored in full compliance with the storage conditions set forth in and referenced under chapter "storage" above and is otherwise handled appropriately. The lapse of the 6 months (180 days) 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 6 months (180 days) 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 6 months (180 days) period.

Processing

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® E 21300 to form polyureas and carbon dioxide. During storage, sample withdrawal, transfer and processing of Desmodur® E 21300, 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 in Desmodur® E 21300 may cause turbidity and possibly solid deposits which may then block filters, pumps and pipelines.
Prolonged storage at temperatures above 70 °C should be avoided. Elevated storage temperatures result in an increase in viscosity and a decreased isocyanate content.

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.

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 .

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