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
Hydrophilically modified aliphatic polyisocyanate based on isophorone diisocyanate (IPDI).As the co-reactant for aqueous resins and as the hardener for chemically resistant and weather-stable coating systems.
Applications
Bayhydur® ultra 401-70 MPA is mainly used as the co-reactant for aqueous polyol binders from the Bayhydrol® range.Because of its hydrophilic character, Bayhydur® ultra 401-70 MPA can be easily emulsified in the aqueous phase.The properties (e.g. resistance to chemicals and solvents) of aqueous two-component polyurethane coatings can be improved by the addition of Bayhydur® ultra 401-70 MPA.
Form supplied
Approx. 70 % in 1-methoxypropylacetate-2(The product may contain up to 0.1 % Xylene.)
Specification
| Property | Test Condition | Value | Unit | Standard |
|---|---|---|---|---|
| NCO content | 9,4 ± 0,5 | % | M105-ISO 11909 | |
| Non-volatile content | (0.2 g / 60 min / 120 °C) | 70 ± 2 | % | M020-ISO 3251 |
| Viscosity | at 23 °C | approx. 1,500 | mPa*s | M014-ISO 3219/A.3 |
| Color value | (Hazen) | ≤ 60 | M017-EN 1557 | |
| Monomeric IPDI | < 0,1 | M106-ISO 10283 |
Typical Values
| Property | Test Condition | Value | Unit | Standard |
|---|---|---|---|---|
| Equivalent weight | approx. 440 | |||
| Flash point | approx. 49 | °C | DIN 55 213/1 | |
| Density | at 20 °C | approx. 1,09 | g/cm3 | DIN 53 217/3 |
Solubility / thinnability
Generally speaking, Bayhydur® ultra 401-70 MPA has good compatibility with the solvents listed. However, the solutions must be tested for their storage stability.Bayhydur® ultra 401-70 MPA is fully soluble/thinnable with aromatics, even without the addition of polar solvents such as esters, ketones and ether esters, e.g. butyl glycol acetate and butyl diglycol acetate.Stable solutions with a minimum solids content of 20 % can be produced by thinning the supply form with, e.g. xylene, toluene or higher boiling aromatics such as solvent naphtha® 100 or mixtures of aromatics. The storage stability must always be tested. If longer storage stability is required, no aliphatics should be added to the thinned solutions. Nevertheless, Bayhydur® ultra 401-70 MPA has the necessary compatibility with aliphatics to be added to coatings containing aliphatic solvents. Only PU grade solvents (< 0.05 % water) should be used. The solvents should not contain reactive groups such as hydroxyl or amino groups.
Compatibility
Generally speaking, Bayhydur® ultra 401-70 MPA can be mixed with the Desmodur®, Bayhydur and Bayhydrol® grades listed. However, the compatibility must be tested within the context of the overall formulation (solids content, co-solvent content, type of co-solvent). Bayhydur® ultra 401-70 MPA can be mixed with Desmodur® ultra N 3300, ultra N 3600, Bayhydur® ultra 3100, most Bayhydrol® grades, e.g. Bayhydrol® A 145, A 242 and A 2058.
Storage
- Storage in original sealed Covestro container. - Recommended storage temperature: 0 - 30 °C. - Protect from moisture, heat and foreign material. General information: Hydrophilic isocyanates are very moisture-sensitive and react with water to form carbon dioxide and insoluble ureas. The containers must always be kept tightly closed. The access of water in all forms (moist air, solvents, moist containers) must be prevented, because the generation of carbon dioxide can lead to dangerous increases in pressure. Storage at higher temperatures will result in increase of color and viscosity.
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, 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.
Conditional Use in Regulated Applications
This product may be suitable for use in food contact. However, use in such applications requires prior written approval from Covestro. Legal requirements for such applications vary by country and jurisdiction, and the customer is solely responsible for verifying compliance with all applicable laws and regulations. Without Covestro’s written approval, the product may not be distributed or used for regulated purposes, and Covestro disclaims all liability for such use.
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 .
