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
Blocked aliphatic polyisocyanate based on H12MDI.In combination with hydroxyl-bearing polyols, especially Desmophen® grades, to formulate lightfast one-component polyurethane stoving coatings; as an additive in conventional stoving systems to improve adhesion and flexibility.
Applications
Desmodur® BL 5375 was developed as a hardener component for lightfast one-compnent stoving polyurethane systems.As with air-drying two-component PU coatings, the film properties can be influenced by the crosslinking density and the selection of hydroxyl-bearing polyol co-reactant.Desmodur® BL 5375 can be used to formulate high-quality industrial finishes, especially for coil and can coating.The product can also be used as an additive to improve flexibility, tear resistance and adhesion of conventional stoving coil and can coating systems.The combination of Desmodur® BL 5375 with Desmophen® 670 results in particularly high flexibility. Such a formulation is suitable for tear resistance coatings flexible substrates and those vulnerable to impact.Available results form Florida weathering tests show that Desmodur® BL 5375 has good weather stability comparable with that of Desmodur® BL 3175. Depending on the polyol used, crosslinking may start at approx. 160 °C. The stoving temperature can be reduced considerably by the addition of a catalyst, e.g. 0.3 to 1 % dibutyltin dilaurate (DBTL). The following stoving cycles can be used, e.g. for combinations with Desmophen® T 1665 in an equivalent crosslinking ratio:with-out catalyst with catalystwith 0.3 % DBTL (on binder solids) Under coil coating conditions, adequate crosslinking of Desmodur® BL 5375 without catalyst is achieved form approx. 241 °C peak metal temperature (PMT) and with the additional of 0.3 % DBTL from approx. 224 °C PMT.
Form supplied
approx. 75 % in solvent naphtha© 100/1-methoxypropylacetate-2, 1 : 1
Specification
| Property | Test Condition | Value | Unit | Standard |
|---|---|---|---|---|
| Non-volatile content | (0.5 g/60 min/60 °C) | 75 ± 2 | % | DIN EN ISO 3251 |
| Viscosity | 4000 ± 1500 | mPa*s | DIN EN ISO 3219/A.3 | |
| Hazen color value | ≤ 150 | DIN EN 1557 |
Typical Values
| Property | Test Condition | Value | Unit | Standard |
|---|---|---|---|---|
| Blocked NCO content | approx. 8,9 | % | ||
| Equivalent weight | approx. 470 | |||
| Flash point | approx. 48 | °C | DIN 53 213/1 | |
| Density at 20 °C | approx. 1,04 | g/cm3 | DIN 53 217/3 |
Solubility / thinnability
Desmodur® BL 5375 can be thinned to a clear solution with a solids content of 40 % by weight with esters, ketones, ether esters and aromatics, including the higher boiling aromatic mixtures solvent naphtha® 100, 150 and 200 S.Aliphatic hydrocarbons are of only limited suitability as diluents. The solutions formed must be tested for their compatibility and storage stability.
Compatibility
Given equivalent crosslinking, Desmodur® BL 5375 is usually compatible with Desmophen® 651, 670, 680, 690, 800, 1100, 1300, RD 181, A 160, A 365, A 450 and A 665, with Desmophen® T 1665 and T 1775 and with Alkydal® F 300, F 310. The combinations should always be tested for their compatibility.
Storage
- Storage in original sealed Covestro container. - Recommended storage temperature: 0 - 30 °C. - Protect from moisture, heat and foreign material. General information: Storage at higher temperatures will result in increase of color and viscosity. Storage at significant lower temperatures will result in solidification. This solidification is reversible by briefly heating the product without adversely affecting the quality of the product. Should the product become turbid, this can be reversed by heating.
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, 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 .
