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
Aliphatic polyisocyanate (IPDI trimer).As the hardener component for lightfast polyurethane coating systems and as an additive resin for alkyd spray coatings.
Applications
Desmodur® Z 4470 BA is used primarily as the hardener component for lightfast two-component polyurethane coatings with high resistance to chemicals and weathering, very good gloss retention and outstanding mechanical properties. On account of its high hardness, Desmodur® Z 4470 BA is normally mixed with Desmodur® N products. Preferred co-reactants are flexibilised polyacrylate polyols such as Desmophen® A 565 and A 575 and polyester polyols such as Desmophen® 670.The main applications for two-component coatings based on Desmodur® Z 4470 BA are in automotive OEM and automotive refinishing.As Desmodur® Z 4470 BA has very good physical drying properties, it is also used as an additive resin in alkyd spray coatings to accelerate drying. The main applications of such coatings are in automotive refinishing and industrial finishing.
Form supplied
approx. 70 % in n-butyl acetate
Specification
| Property | Test Condition | Value | Unit | Standard |
|---|---|---|---|---|
| NCO content | 11,9 ± 0,4 | % | M105-ISO 11909 | |
| Non-volatile content | (0.2 g/1 h/120 °C) | 70 ± 2 | % | M020-ISO 3251 |
| Viscosity | at 23 °C | 600 ± 200 | mPa*s | M014-ISO 3219/A.3 |
| Color value (Hazen) | ≤ 60 | M017-EN 1557 | ||
| Monomeric IPDI | < 0,35 | % | M106-ISO 10283 |
Typical Values
| Property | Test Condition | Value | Unit | Standard |
|---|---|---|---|---|
| Viscosity | at 25 °C | approx. 550 | mPa*s | M014-ISO 3219/A.3 |
| Equivalent weight | approx. 360 | |||
| Flash point | approx. 34 | °C | DIN 53 213/1 | |
| Density at 20 °C | approx. 1,06 | g/ml | DIN EN ISO 2811 |
Solubility / thinnability
Desmodur® Z 4470 BA is soluble or thinnable in polar solvents such as esters, ketones and ether esters, e.g. butyl acetate, methyl ethyl ketone and methoxypropylacetate, as well as in aromatics. Generally speaking, it has good compatibility with the solvents listed. However, the solutions formed must be tested for their storage stability. Only PU grade solvents should be used (max. 0.05 % water, absence of reactive groups such as hydroxyl or amino groups).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. If prolonged storage stability of the thinned solutions is required, aliphatics should not be added. However, Desmodur® Z 4470 BA has the necessary compatibility with aliphatics to allow its addition to coatings formulated with aliphatic solvents.
Compatibility
Generally speaking, Desmodur® Z 4470 BA can be mixed with the following products: aliphatic polyisocyanates such as Desmodur® N 100, N 75, N 3200, ultra N 3300, N 3400 and ultra N 3600; aromatic polyisocyanates such as Desmodur® L/ultra L, HL and IL/ultra IL; polyester polyols such as Desmophen® 670; polyacrylates such as the Desmophen A products; alkyd resins such as Alkydal® F 48.However, the compatibility of the combinations used should always be tested.
Storage
- 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 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 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
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 .
