Aromatic polyisocyanate based on toluene diisocyanate.In combination with various Desmophen®, Baycoll®, Desmocoll® grades or other hydroxyl-bearing substances to formulate two-component polyurethane coatings and adhesives.
Product description
Applications
Systems crosslinked with Desmodur® L 75 can be used as coatings for furniture, parquet flooring, metal, paper, plastics and mineral substrates. Desmodur® L 75 is also suitable for room-temperature crosslinking of adhesives based on Desmocoll® or Baycoll®. These can be used to bond many materials, e.g. wood, metal and plastic. The use of this polyisocyanate increases the resistance of the bonds to heat, oil, plasticizers and many solvents. It ensures good adhesion to many materials, especially plastics. The pale inherent color of Desmodur® L 75 permits its use in bonding transparent plastic films for packaging.
Form supplied
approx. 75 % in ethyl acetate
Specification
| Property | Test Condition | Value | Unit | Standard |
|---|---|---|---|---|
| NCO content | 13,3 ± 0,4 | % | M105-ISO 11909 | |
| Non-volatile content | 75,0 ± 2,0 | % | M020-ISO 3251 | |
| Viscosity | (23 °C) | 1,600 ± 400 | mPa*s | M014-ISO 3219/A.3 |
| Color | (Iodine) | ≤ 2 | M017-EN 1557 | |
| Monomer content | < 0,5 | % | M106-ISO 10283 |
| Property | Test Condition | Value | Unit | Standard |
|---|---|---|---|---|
| Non-volatile content | 73 - 77 | % | M020 - ISO 3251 | |
| NCO content | 12.9 - 13.7 | % | M105 - ISO 11909 | |
| Monomer content | < 0.5 | % | M106 - ISO 10283 | |
| Dynamic viscosity | 23 °C | 1,200 - 2,000 | mPa·s | M014 - ISO 3219/A.3 |
| Color | Iodine | ≤ 2.000 | M017 - EN 1557 |
Typical Values
| Property | Test Condition | Value | Unit | Standard |
|---|---|---|---|---|
| Equivalent weight | approx. 315 | |||
| Flash point | approx. 5 | °C | DIN 51755 | |
| Density | at 20 °C | approx. 1,17 | g/ml | DIN EN ISO 2811-3 |
| Property | Test Condition | Value | Unit | Standard |
|---|---|---|---|---|
| Flash point | 5.00 | °C | DIN 51755 | |
| Density | 20 °C | 1.17 | g/cm³ | DIN 53217 |
| Equivalent weight | approx. 315 |
Solubility / thinnability
In general, Desmodur® L 75 has good compatibility with esters such as ethyl acetate, butyl acetate and
1-methoxypropylacetate-2 and aromatic hydrocarbons such as toluene, xylene, Solvesso 100 and Shellsol® A. However, the solutions formed must be tested for their storage stability.
The product is not compatible with aliphatics. Alcohols react with Desmodur® L 75 and therefore cannot be used.
Prolonged storage of a solution with low binder content may result in turbidity and sedimentation.
Only PU grade solvents should be used (< 0.05 % water). The solvent should not contain reactive groups.
Compatibility
In general, Desmodur® L 75 is compatible with many polyesters, polyethers and polyacrylates, as well as with other Desmodur grades.
Storage
- Storage in original sealed Covestro container.
- Recommended storage temperature: {{storageTemperature}} 10 - 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.
Covestro represents that, for a period of {{storageTimeWarrantyInMonths}} following the day of shipment as stated in the respective transport documents, the product will meet the specifications or values set forth in chapter "Specification" above, what ever is applicable, provided that the product is stored in full compliance with the storage conditions set forth in and referenced under chapter "storage" above and is otherwise handled appropriately. The lapse of the {{storageTimeWarrantyInMonths}} 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 {{storageTimeWarrantyInMonths}} 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 {{storageTimeWarrantyInMonths}} period.
Health and Safety Information
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.
Important
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.
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 .
