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
Aqueous polyurethane dispersion.
Dispercoll® U68 PLUS is an anionic waterborne polyurethane dispersion. It is a raw material in the formulation of adhesives for application in the shoe industries. Its characteristic polymer properties make Dispercoll® U68 PLUS particularly well suited for heat-activated bonding applications with excellent anti-hydrolysis resistance, heat resistance, and initial tack.
Applications
Dispercoll® U68 PLUS shows excellent adhesion on most synthetic and natural materials. It is commended to be used in one-component systems. Desmodur® 2802 could be added to one-component formulation to improve anti-hydrolysis and other performances to meet customer-specific requirements. In a two-component application, it is recommended to blend with 3 - 5% by weight of a water-based isocyanate crosslinker, such as Desmodur® products, to further enhance resistance to heat, plasticizers, fats, and oils. Crosslinker should be added right before application and mixed intensively. Pay attention to the pot life of the mixture. Additives such as resin dispersions, emulsifiers, and thickeners could be added to customize certain application-specific properties.
Before application, especially by spraying, the mixture should be filtered to remove any polymer particles which may have formed by initial drying.
For heat-activated bonding applications with Dispercoll® U68 PLUS, bonding temperature in the range of approx. 50 – 70°C is recommended to allow the dried adhesive layer to be fully activated. The practical temperature for a specific application is depending on the process conditions of desire, i.e. bonding time, pressure, and substrates.
Form supplied
Dispersion in water with a non-volatile content of approx. 50 %.
Specification
| Property | Test Condition | Value | Unit | Standard |
|---|---|---|---|---|
| Non-volatile content | 1,0 g / 60 min / 125°C | 49.0 - 51.0 | % | M020 - ISO 3251 |
| Dynamic viscosity | LV2 / 30 rpm / 23°C | < 1,000 | mPa·s | M092 - ISO 2555 |
| pH-value | 6.0 - 9.0 | M022 - ISO 976 |
Storage
- Storage in original sealed Covestro container.
- Recommended storage temperature: 15 - 30 °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 temperatures below +10°C. Temperatures below +10°C may damage the product irreversibly. Prolonged storage at higher temperatures may affect the product’s properties. Containers must be kept sealed and protected from direct sunlight otherwise the evaporation of water may result in the formation of a non-redispersible polymer film.
Storage time
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 .
