Covestro certifies that the product meets specifications for 12 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 12 months.
Product description
Aromatic polyurethane prepolymer with butanone oxime-blocked NCO groups.
Applications
Impranil® HS-80 is suitable for application by the transfer coating process as top coats, intermediate coats (compact or foamed), foamed films and by the direct coating process as single- or double-sided coatings.
Form supplied
Solution in methoxypropylacetate with a non-volatile content of approx. 90 %.
Specification
| Property | Test Condition | Value | Unit | Standard |
|---|---|---|---|---|
| Dynamic viscosity | 23 °C | 40,000 - 70,000 | mPa·s | M014 - ISO 3219/A.3 |
Principal properties
- Low-solvent
- High film thickness possible in one coat
- Outstanding resistance to hydrolysis
- Long pot life if crosslinked with Imprafix® HS-C
Solubility / thinnability
Solvents such as ethyl acetate, methoxypropylacetate or dimethylformamide can be added to lower the viscosity of Impranil® HS-80. The addition of 5 - 10 % of one of the solvents listed above can lower the viscosity by 20,000 to 25,000 mPa·s.
Ketone-based solvents may not be used as thinning agents as these solvents interfere with crosslinking.
Storage
- Storage in original sealed Covestro container.
- Recommended storage temperature: room temperature (20 °C)
- Protect from moisture, heat and foreign material.
General information: The product may become turbid if the storage temperature is too low. This can be reversed by briefly heating to 35 °C. Briefly stirring the product does not completely reverse turbidity, leading to leveling problems.
Storage time
Processing
Crosslinker:
- Imprafix® HS-C
Crosslinking conditions:
- Temperature: 150 – 160°C
- Dwell time: 1.5 - 2 minutes
Crosslinking ratio:
- Impranil® HS-80 : Imprafix® HS-C
1,000 g : 80 g
Pot life:
Once the crosslinker has been added, the coating has a maximum pot life of 7 days, provided a temperature of 35 °C is not exceeded when mixing the formulation.
Deaeration:
It is recommended that the coatings be deaerated prior to application.
Film properties
The data given below are average values measured in approx. 0.1 mm
transparent films of Impranil® HS-80
| Property | Test Condition | Value | Unit | Standard |
|---|---|---|---|---|
| 100 % modulus | 4,5 | MPa | DIN 53504 | |
| Tensile strength | Original | 25 | MPa | DIN 53504 |
| Tensile strength | after 14 d Hydrolysis (70°C, 95% r.F.) | 25 | MPa | DIN 53504 |
| Tensile strength | after 42 d Hydrolysis (70°C, 95% r.F.) | 25 | MPa | DIIN 53504 |
| Elongation at break | Original | 450 | % | DIN 53504 |
| Elongation at break | after 14 d Hydrolysis (70°C, 95% r.F.) | 440 | % | DIN 53504 |
| Elongation at break | after 42 d Hydrolysis (70°C, 95% r.F.) | 500 | % | DIN 53504 |
| Lightfastness | 3 | DIN EN SIO 105-B02 | ||
| Volume swelling | ||||
| Ethylacetate ** | 2h at room temperature | 180 | % | |
| Butanone** | 2h at room temperature | 300 | % | |
| Melting range | 200-230 | °C | Kofler heating table |
*These values provide general information and are not part of the product specification. **The volume swelling decreases again as the solvent evaporates.
Health and Safety Information
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.
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, 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.
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 .
