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
Polyester-polyacrylate dispersion.In the formulation of stoving industrial coatings with high whiteness retention on exposure to high temperatures.Also in the formulation of two-component polyurethane primers and top coats for plastics.
Applications
The viscosity of the product is highly dependent on the pH. As the pH may decrease during storage, a decrease in viscosity must also be expected. The viscosity can be restored to its original value by adding small amounts of an aqueous 10 % solution of dimethyl ethanol amine.Stoving industrial coatings:To ensure optimum pigment wetting, the pH should be adjusted with aqueous dimethyl ethanol amine (10 %) to between 8.5 and 9. Details can be found in the relevant guide formulations.Combined with melamine resins, Bayhydrol® A 2227/1 can be used to formulate stoving top coats with less than 5 % co-solvent content at application viscosity. The coatings cure at stoving conditions from 30 minutes at 120 °C. The ratio of Bayhydrol® A 2227/1 to amino resin (solids on solids) is usually 80 : 20. Given the many different amino resins available on the market, compatibility tests should always be carried out.To achieve good storage stabilities of coatings based on Bayhydrol® A 2227/1 the pH of the coating should be adjusted to between 8.5 and 9 after formulation.Coatings for plastics:In the case of coatings for plastics, we recommend the use of Bayhydur® ultra 3100. An OH/NCO ratio of 1 : 1.5 should be used.Bayhydrol® A 2227/1 is characterised by its good pigment wetting properties and high shear stability. Bead and sand mills have proved suitable as grinding equipment. Grinding temperatures of up to approx. 50 °C have no detrimental effect on quality of the coating.Given the many different pigments available, the storage stability should always be tested. The rutile titanium dioxide pigments of the Tronox range, especially Tronox® R-KB-4, are particularly suitable.
Form supplied
approx. 42 % in water/2-butoxyethanol, dimethyl ethanol amine neutralized, 7.0 % 2-butoxyethanol.
Specification
| Property | Test Condition | Value | Unit | Standard |
|---|---|---|---|---|
| Non-volatile content | (1 g/1 h/125 °C/convection oven) | 41 - 43 | % | DIN EN ISO 3251 |
| Viscosity | at 23 °C, (D = approx. 40 s^(-1) | 700 - 2,500 | mPa*s | DIN EN ISO 3219/A.3 |
| Acid value | 7 - 10 | mg KOH/g | DIN EN ISO 2114 | |
| pH-value | 7,5 - 8,5 | DIN ISO 976 |
Typical Values
| Property | Test Condition | Value | Unit | Standard |
|---|---|---|---|---|
| OH % on solid | approx. 3,8 | % | calculated | |
| Mean particle size | < 150 | nm | photon correlation spectroscopy | |
| Minimum film forming temperature (MFT) | < 0 | °C | DIN ISO 2115 | |
| Density | at 20 °C | approx. 1,06 | g/ml | DIN EN ISO 2811 |
| Flash point | > 98 | °C | DIN EN ISO 2719 |
Solubility / thinnability
Bayhydrol® A 2227/1 can be thinned with water. It is compatible with a certain proportion of glycol ethers and glycol ether esters.
Compatibility
Suitable co-reactants for stoving industrial coatings are hexamethoxymethyl melamine resins, partially etherified melamine resins such as Maprenal® MF 904 and MF 915 and Cymel® 303, 325 and 327.Bayhydur® ultra 3100 is recomended as co-reactant in the formulation of primers and top coats for plastics.
Storage
- Storage in original sealed Covestro containers. - Recommended storage temperature: > 0 ≤ 23 °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
Formulation and application equipment can be cleaned with water, alkaline cleaning agents or 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 .
