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
Oil-free, hydroxyl-bearing, saturated polyester.In combination with amino or crosslinking baking urethane resins in the formulation of baking coatings such as primers, automotive primer surfacers, coil coatings and general industrial coatings with very good weather stability.
Applications
Desmophen® T 1665 SN/IB is intended primarily for the baking sector. It is used in the formulation of:Primers and primer surfacersHard, highly elastic and sandable primers and primer surfacers can be formulated by combination with amino resins and the addition of epoxy or baking urethane resins. The primer surfacers are further characterised by their good stone-chip resistance which is greatly enhanced by the addition of baking urethane resins (e.g. Desmodur® BL 3175). Coil coatingsCoil coatings can be formulated by combination with baking urethane and amino resins. A proven baking urethane resin recommended for this application is Desmodur® BL 3175. Coatings formulated in this way display high elasticity coupled with good hardness and resistance to scratching and abrasion. Dibutyltin dilaurate is a suitable catalyst. The recommended addition is 0.3 - 1.0 %, calculated on the solvent-free resin.If working with amino resins, preferably hexamethoxymethyl melamine, a combination ratio of between 90 : 10 and 80 : 20 is recommended. Depending on the amino resin chosen, acid catalysts (either free or blocked) are required. The recommended addition is 0.2 - 0.6 %, calculated on the solvent-free resin.Depending on the type of combination resin used, the baking temperature will be 210 - 241 °C PMT (peak metal temperature).3. Industrial coatingsIn the formulation of industrial coatings and finishes for household appliances, a Desmophen® T/amino resin ratio of between 80 : 20 and 75 : 25 is recommended. This yields paint films characterized by high elasticity and hardness, resistance to household chemicals and excellent single-coat adhesion. They also display very good gloss retention and anti-yellowing properties, even in the event of long-term exposure to temperatures up to 160 °C.
Form supplied
approx. 65 % in solvent naphtha® 100/isobutanol, 31.5 : 3.5
Specification
| Property | Test Condition | Value | Unit | Standard |
|---|---|---|---|---|
| Hazen color value | ≤ 100 | DIN EN 1557 | ||
| Acid value | ≤ 5,5 | mg KOH/g | DIN EN ISO 2114 | |
| Viscosity at 23 °C | 2,700 ± 300 | mPa*s | DIN EN ISO 3219/A.3 | |
| Non-volatile content | (2 g resin/2 ml toluene/ 1 h at 125 °C, convection oven) | 65 ± 1 | % | DIN EN ISO 3251 |
Typical Values
| Property | Test Condition | Value | Unit | Standard |
|---|---|---|---|---|
| Hydroxyl content, | on solid resin | approx. 2,6 | % | DIN EN ISO 4629-2 |
| Hydroxyl content, | supply form | approx. 1,7 | % | DIN EN ISO 4629-2 |
| OH-equivalent weight, | supply form | approx. 1,000 | ||
| Density | at 20 °C | approx. 1,17 | g/ml | DIN EN ISO 2811-1 |
| Density | at 20 °C | approx. 1,05 | g/ml | DIN EN ISO 2811-2 |
| Flash point | approx. 37 | °C | DIN EN ISO 1523 |
Compatibility
1) Cytec Deutschland GmbH, Neuss, Germany2) Solutia GmbH, Mainz, Germany3) Resolution Deutschland GmbH, Germany
Storage
- Storage in original sealed Covestro container. - Recommended storage temperature: max. 30 °C. - Protect from moisture, heat and foreign material.
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.
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 .
