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
Aqueous hydroxyfunctional polyacrylic dispersion.In the formulation of flexible two-component polyurethane top coats and primers for plastics.
Applications
Bayhydrol® A 2058 is a hydrolysis-resistant polyacrylic dispersion neutralised with dimethyl ethanol amine. The product can be thinned with water to application viscosity. Bayhydrol® A 2058 combined with Bayhydur® ultra 3100 yields high-gloss flexible top coats which are resistant to solvents. The formulation can be applied as a one-coat system on many substrates and has good adhesion and body. Water-borne base coats formulated with, e.g. Bayhydrol® UH 2952/1, can be overcoated with clear coats based on Bayhydrol® A 2058.Two-pack primers can be formulated by combining Bayhydrol® A 2058 with Bayhydur® ultra 3100. These are highly suitable for use on thermoplastics and thermosets and are characterised by excellent adhesion, sandability and water resistance.Bayhydrol® A 2058 has good pigment wetting properties and high shear stability. Sand and bead mills have proved suitable as grinding equipment. Pigments and extenders are added to a small amount of the total Bayhydrol® content in the formulation. Deionised water is added to adjust the mixture to dispersion viscosity. Because of the good shear stability of the product, dispersion temperatures of up to 40 °C have no negative effect.Depending on the co-reactants used, coatings formulated with Bayhydrol® A 2058 can be dried for 45 min at 80 °C.The pot life of systems applied under standard conditions (23 °C, 60 ± 5 % relative humidity) is approx. 1 hour.
Form supplied
Approx. 42% in water / 2-butoxyethanol, dimethyl ethanol amine neutralized, 2% 2-butoxyethanol.
Specification
| Property | Test Condition | Value | Unit | Standard |
|---|---|---|---|---|
| Non-volatile content | (1 g/1 h/125 °C/convection oven) | 41 - 45 | % | DIN EN ISO 3251 |
| pH-value | 7,5 - 9,5 | DIN ISO 976 | ||
| Viscosity | at 23 °C, approx. D = 82 s^-1 | 200 - 2,000 | mPa*s | DIN EN ISO 3219/A.3 |
Typical Values
| Property | Test Condition | Value | Unit | Standard |
|---|---|---|---|---|
| Density | at 20 °C | approx. 1,0 | g/ml | DIN EN ISO 2811-2 |
| Acid value | (solid resin) | approx. 25 | mg KOH/g | DIN EN ISO 2114 |
| Flash point | > 100 | °C | DIN EN 22 719 | |
| OH % on solid | approx. 4,8 | % | calculated |
Solubility / thinnability
Bayhydrol® A 2058 can be thinned with water. It has only partial compatibility with glycol ethers and alcohols. Such solutions/mixtures must be checked for compatibility and storage stability.
Compatibility
In general, Bayhydrol® A 2058 can be combined with polyester-polyurethane dispersions.Suitable co-reactants include Desmodur® ultra N 3600 and Bayhydur® ultra 3100.If formulating one-component coats with melamine resins, the compatibility must be tested first.
Storage
- Storage in original sealed Covestro containers. - Recommended storage temperature: > 0 ≤ 30 °C. - Protect from frost, heat and foreign material. General information: The product is sensitive to frost. Prolonged freezing can 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 six 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 six 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 six 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 six months period.
Processing
Application and formulation equipment can be cleaned with water, alkaline cleaning agents or alkaline isopropanol.
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, 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 .
