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.
Product description
Aliphatic anionic polyester polyurethane dispersion.As a combination binder in the formulation of highly flexible, water-thinnable, air- and force-drying primers and one-coat finishes for use on plastics.
Applications
Bayhydrol® UH 240 can be used in combination with hydrofunctional resins, preferably Bayhydrol® U XP 2698, Bayhydrol® U 2757 and in the formulation of highly flexible two-component polyurethane top coats (e.g. in soft-feel coating systems). After crosslinking with, e.g. Bayhydur® 3100 force-drying (e.g. 30 - 45 min at 80 °C) yields films with good surface handle and good resistance to abrasion and water. Formulation/applicationSuitable grinding equipment includes sand or bead mills. During grinding the temperature of the mill base should not exceed 40 °C. After formulation the pH of flexible primers based on Bayhydrol® UH 240 is approx. 8. The flexible primers can be applied by conventional spraying methods. CleaningAll equipment should be cleaned immediately after use or left to soak in water. Warm water, alkaline cleaning agents or alkaline isopropyl alcohol are suitable for cleaning.
Form supplied
approx. 40 % in water
Specification
| Property | Test Condition | Value | Unit | Standard |
|---|---|---|---|---|
| Viscosity at 23 °C,(D = 40 s^(-1) | < 150 | mPa∙s | DIN EN ISO 3219/A.3 | |
| Non-volatile content | (1 g/1 h 125 °C) | 39 - 41 | % | DIN EN ISO 3251 |
| pH | 6 - 8 | DIN ISO 976 | ||
| Mean particle size | max. 210 | nm | photon correlation spectroscopy |
Typical Values
| Property | Test Condition | Value | Unit | Standard |
|---|---|---|---|---|
| Acid value | approx. 0,5 | mg KOH/g | DIN EN ISO 2114 | |
| Minimum film forming temperature (MFT) | < 0 | °C | DIN ISO 2115 | |
| Density | at 20 °C | approx. 1,1 | g/ml | DIN EN ISO 2811-2 |
| Appearance | milky, cloudy |
Solubility / thinnability
With water.
Compatibility
Bayhydrol® UH 240 is compatible with many acrylic dispersions, polyurethane dispersions and water-thinnable polyesters. Given the many different products available, the compatibility should always be tested.
Storage
- Storage in original sealed Covestro containers. - Recommended storage temperature: 5 - 40 °C. - Protect from frost, heat and foreign material. General information: An increase in viscosity may occur during storage. If the containers are not sealed properly, the evaporation of water will result in the formation of a film which cannot be redispersed. The product is sensitive to frost. Freezing will damage the product irreversibly. Prolonged storage at higher temperatures may result in a decrease of viscosity and/or an increase of average particle size, possibly resulting in sedimentation or coagulation. Contamination with certain bacteria, fungi or algae may render the product unusable.
Storage time
Covestro represents that, for a period of nine months following the day of shipment as stated in the respective transport documents, the product will meet the specifications or values set forth in section "specifications or characteristic data" above, what ever is applicable, provided that the product is stored in full compliance with the storage conditions set forth in and referenced under section "storage" above and is otherwise handled appropriately.The lapse of the nine 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 nine 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 nine months period.
Health and Safety Information
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, 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.
Conditional Use in Regulated Applications
This product may be suitable for use in food contact. However, use in such applications requires prior written approval from Covestro. Legal requirements for such applications vary by country and jurisdiction, and the customer is solely responsible for verifying compliance with all applicable laws and regulations. Without Covestro’s written approval, the product may not be distributed or used for regulated purposes, and Covestro disclaims all liability for such use.
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 .
