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Technische Eigenschaften & Datenblätter

Product description

Aqueous polyurethane dispersion.

Dispercoll® U 2662 is a waterborne dispersion of an anionically modified polyurethane. It is an adhesive raw material for the formulation of adhesives for use in e.g. the shoe, furniture, or automotive industries. Its characteristic polymer properties make Dispercoll® U 2662 particularly well suited for heat-activated bonding applications with high tack and good hydrolysis resistance.

Applications

Dispercoll® U 2662 has good tack performance and shows good adhesion on most synthetic and natural materials. 0.5 -3 % polycarbodiimide type crosslinkers are recommended to add into the dispersion to be used as one component which has no pot life limitation. Desmodur® 2802 from Covestro can be added into Dispercoll® U 2662 with 0.5 – 3 % as one component product used to improve heat resistance and anti-hydrolysis resistance. Based on customer requirements, it can be also used as two components with 3 - 5 % by weight of a water emulsifiable crosslinker polyisocyanate is added immediately prior to application and mixed in intensively. The pot life of the mixture must be observed. In order to customize other application-specific and technical properties, resin dispersions, emulsifiers, and thickeners may also be added.
Before application, especially by spraying, the product should be filtered to remove any polymer particles which may have formed by initial drying.
For heat activation bonding applications with Dispercoll® U 2662, a bond line temperature in the range of approx. 50 - 70°C is recommended to allow the dried adhesive layer to be fully activated for bonding. The actual temperature needed for a specific application will depend on the time in the press, the pressure applied and the substrates being bonded.

Form supplied

Dispersion in water with a non-volatile content of approx. 48.5 %.

Specification

Property Test Condition Value Unit Standard
Non-volatile content 1,0 g / 60 min / 125°C 46.0 - 51.0 % M020 - ISO 3251
Dynamic viscosity 23 °C < 1,500 mPa·s M068 - DIN 53019
pH-value 6.0 - 9.0 M022 - ISO 976

Storage

- Storage in original sealed Covestro containers.

- Recommended storage temperature: 5 - 25 °C, temperatures higher than 30°C should be avoided.

- Protect from direct sunlight, frost, heat and foreign material.

General information: The product is sensitive to frost. Freezing can damage the product irreversibly. Prolonged storage at higher temperatures may affect the product properties. Containers must be kept sealed and protected from direct sunlight as otherwise the evaporation of water will result in the formation of a non-redispersible polymer film.

Storage time

Covestro represents that, for a period of 6 Months 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 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 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 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

Technisches Datenblatt
Sicherheitsdatenblatt
Kein direkter Download verfügbar, bitte besuchen Sie www.productsafetyfirst.covestro.com

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