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.
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
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 .
