Water-reducible, aliphatic, self-crosslinking stoving urethane resin.Bayhytherm® 3246 is used for the formulation of waterborne, one-component baking systems such as waterborne primer surfacer or general purpose industrial coatings. Bayhytherm® 3246 is the further development of Bayhytherm® 3146 without NMP.
Product description
Applications
Bayhytherm® 3246 is used for the formulation of waterborne, one-component baking systems such as waterborne fillers or general purpose industrial coatings. Coating films based on Bayhytherm® 3246 exhibit extraordinary impact strength, adhesion and overcoatability. Bayhytherm® 3246 can also be used as an additive to conventional waterborne stoving systems to improve flexibility, impact strength and adhesion.The product is characterized by a high reactivity, good pigment wetting and thermal stability. Because it is easyer to dilute, it also offers advantages with respect to the solids content and filling power of the coating systems at spray viscosity.Typical curing parameters are 30 min at 130 °C. The product exhibits overbaking stability up to 120 min at 190 °C. Slight thermal yellowing may occur depending on the baking temperature and time.
Form supplied
approx. 46% dispersion in water, MPA, SN 100, 47.9 : 2.6 : 2.4 (neutralized with 1.1% DMEA – bound as a salt – )
Specification
| Property | Test Condition | Value | Unit | Standard |
|---|---|---|---|---|
| Acid value | 7 - 10 | mg KOH/g | DIN EN ISO 2114 | |
| Viscosity | at 23 °C, (D = approx. 186 s^(-1) | 100 - 1,200 | mPa*s | DIN EN ISO 3219/A.3 |
| Non-volatile content | (1 g / 1 h / 105 °C) | 45 - 47 | % | DIN EN ISO 3251 |
| pH-value | 6,8 - 8,5 | DIN ISO 976 |
Typical Values
| Property | Test Condition | Value | Unit | Standard |
|---|---|---|---|---|
| Density | approx. 1,07 | g/ml | DIN EN ISO 2811 | |
| Visual appearance | turbid |
Solubility / thinnability
Bayhytherm® 3246 can be diluted with water, esters, ketones, alcohols, glycols and glycol ethers.However, the solutions formed must be tested for their storage stability.
Compatibility
Bayhytherm® 3246 is compatible with e.g. Bayhydrol® U XP 2698 or UA 2856; with blocked polyurethane dispersions such as Bayhydur® BL XP 2706 or Bayhydur® BL 2867 and also with amino resins such as Luwipal® 066LF, 072 or 0731) and Maprenal® MF 904 or MF 9152).However, the compatibility of the combinations used should always be tested. 1) BASF AG, Ludwigshafen2) INEOS Melamines GmbH, Frankfurt/Main
Storage
- Storage in original sealed Covestro container. - Recommended storage temperature: 5 - 23 °C. - Protect from frost, heat and foreign material. General information: 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.
Storage time
Covestro represents that, for a period of five 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 five 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 five 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 five 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.
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 .
