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Aromatic polyisocyanate based on toluene diisocyanate.
Hardener component for fast drying, two-component polyurethane coatings.
The two-component polyurethane systems formulated with Desmodur® ultra IL 11451 BA are characterized by their very rapid initial drying and early sandability, making them ideal for the industrial coating of wood and furniture. An NCO/OH ratio of approx. 0.5 - 0.7 is recommended as a function of the reactivity and hardness of the polyol. With an NCO/OH ratio of 1:1, the Desmodur® ultra IL 11451 BA must be combined with Desmodur® L/ultra L. In this case, the optimal ratio of the Desmodur L/ultra L / Desmodur® ultra IL 11451 BA is a function of polyol hardness and the required drying time. The low viscosity and high reactivity of the Desmodur® ultra IL 11451 BA enables the formulation of clear and colored coatings with high solids contents. These can be applied quickly and only a few coats are required.
approx. 51 % in butyl acetate
| Property | Test Condition | Value | Unit | Standard |
|---|---|---|---|---|
| NCO content | 6.4 - 7.1 | % | M105 - ISO 11909 | |
| Monomer content | < 0.10 | % | M106 - ISO 10283 | |
| Dynamic viscosity | 23 °C | 300 - 800 | mPa·s | M014 - ISO 3219/A.3 |
| Color | Hazen | ≤ 100 | M017 - EN 1557 |
| Property | Test Condition | Value | Unit | Standard |
|---|---|---|---|---|
| Non-volatile content | 0,2 g /60 min / 120°C | 51.0 | % | M020 - ISO 3251 |
Generally speaking, Desmodur® ultra IL 11451 BA is well suited to thinning with esters such as ethyl acetate, butyl acetate, 1-methoxyproplyacetate-2 and aromatic hydrocarbons such as toluene, xylene, Solvesso® 100 and Shellsol® A. The solutions formed must be tested for their storage stability. In particular, prolonged storage of a solution with low binder content may result in turbidity and sedimentation. The product cannot be reduced with mineral spirit. Alcohols react with Desmodur® ultra IL 11451 BA and therefore may not be used. Only PU grade solvents (< 0.05 % water, free of other reactive impurities) may be used.
Desmodur® ultra IL 11451 BA is compatible with Desmophen® A 450, many polyester-based Desmophen® grades and with alkyd resin, including combinations with nitrocellulose. In the critical combinations, Desmodur® ultra IL 11451 BA exhibits better compatibility than the standard products based on TDI isocyanurates. Desmodur® ultra IL 11451 BA can be combined with Desmodur® L/ultra L and also with Desmodur® HL and Desmodur® N/ultra N. The compatibility of Desmodur® ultra IL 11451 BA with the other formulation components must be tested in advance.
- Storage in original sealed Covestro container.
- Recommended storage temperature: 0 - 30 °C.
- Protect from moisture, heat and foreign material.
General information: The product is sensitive to moisture. Storage at high temperatures will lead to an increase in viscosity and a reduction of the NCO content.
Covestro certifies that the product meets specifications for 9 months from the date of shipment, provided it is stored and handled in accordance with the conditions specified in the ‘Storage’ section. After this period, product performance is not assured; Customers are responsible for retesting material before use. Covestro assumes no liability for product performance after 9 months.
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.
The product is mainly used as a hardener in coating materials or adhesives. The handling of coating materials or adhesives containing reactive polyisocyanates and residual levels of monomeric TDI requires appropriate protective measures (see safety data sheet). They may therefore only be used in industrial or professional applications. They are not suitable for use in do-it-yourself applications.
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.
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.
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.
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.
Please use our contact form or contact us directly by sending an e-mail to technical-datasheets@cx.covestro.com .
