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 aromatic polyisocyanate based on TDI.In combination with polyol components or polyamines to formulate one-component stoving coatings.
Applications
When used as the crosslinking component for polyols, Desmodur® BL 1265/1 MPA/X yields coatings with high levels of hardness and good resistance to deformation, impact and chemicals. Applications include coatings for the inside of tubes, can coatings and stone-chip primer surfacers. It can be used in top coats if only low levels of weather stability are required. When used as an additive, Desmodur® BL 1265/1 MPA/X improves the flexibility and resistance to abrasion, impact and/or chemicals of a coatings, for example, coil coating primers, primers for industrial finishes and stone-chip primer surfacers. A special application is the use of Desmodur® BL 1265/1 MPA/X in automotive stone-chip primer surfacers based on Desmodur® BL 1100/1 and Laromin C 260. Additions of 10 - 40 % (BL 1265/1 : BL 1100/1, calculated on solids) increase film hardness and low-temperature crack resistance. Equivalent mixtures (NCO/OH = 1.0) of Desmodur® BL 1265/1 MPA/X with Desmophen® grades yield optimum paint films. The amount of Laromin® C 260 required for crosslinking has been determined empirically. The optimum is approx. 13 % by wt., calculated on Desmodur® BL 1265/1 MPA/X. One-component systems based on Desmodur® BL 1265/1 MPA/X (with Desmophen® or Laromin® C 260) are stable at room temperature and at 40 °C. Desmodur® BL 1265/1 MPA/X combinations with pigments, extenders and additives can be formulated using standard equipment. The temperature during dispersion should not exceed 70 °C. Storage stability is limited at temperatures above 80 °C, even if exposure is brief. The crosslinking temperature depends on the stoving time and the co-reactant used. Stoving conditions range from approx. 30 min at 150 °C to those used in coil coating.
Form supplied
approx. 65 % in 1-methoxypropylacetate-2/xylene, 1 : 1
Specification
| Property | Test Condition | Value | Unit | Standard |
|---|---|---|---|---|
| Non-volatile content | (0.2 g/60 min/80 °C) | 65 ± 2 | % | DIN EN ISO 3251 |
| Viscosity at 23 °C | 20,000 ± 5,000 | mPa*s | DIN EN ISO 3219/A.3 | |
| Color value (Hazen) | ≤ 150 | DIN EN 1557 | ||
| Free NCO content | mod. | < 0,2 | % | DIN EN ISO 11 909 |
Typical Values
| Property | Test Condition | Value | Unit | Standard |
|---|---|---|---|---|
| Blocked NCO content | approx. 4,8 | % | ||
| Equivalent weight | approx. 875 | |||
| Flash point | approx. 32 | °C | DIN 53 213/1 | |
| Density at 20 °C | approx. 1,1 | g/ml | DIN EN ISO 2811 |
Solubility / thinnability
Generally speaking, Desmodur® BL 1265/1 MPA/X has good compatibility with the solvents listed. However, the solutions formed must be tested for their storage stability. Desmodur® BL 1265/1 MPA/X is readily soluble in ethers, esters, ketones, aromatic hydrocarbons and turpentine oil. It has limited thinnability with aliphatic hydrocarbons. Only PU grade solvents should be used (< 0.05 % water). The solvents should not contain reactive groups such as hydroxyl or amino groups.
Compatibility
Given equivalent crosslinking (NCO/OH = 1.0), Desmodur® BL 1265/1 MPA/X is generally miscible with Desmophen® 650, 651, 670, 680, 690, 800, 850, 1100, 1150, 1200, 1300, RD 181, A 365 and 1380 BT. It can also be combined with various plasticizers and epoxy resins such as Laromin® C 260 (BASF). The combinations should always be tested for their compatibility. Combinations with Desmodur® BL 1100/1 are cloudy and do not always have unlimited 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.
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 .
