Covestro certifies that the product meets specifications for {{storageTimeWarrantyInMonths}} 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 {{storageTimeWarrantyInMonths}}.
Product description
Linear hydroxyl-bearing polyester.In the formulation of flexible PU coatings.
Applications
Desmophen® 1652 is used in combination with Desmodur® VL to formulate flexible solvent-free coatings and sealers.
If Desmodur® L or HL are used, the formulations will only yield a drying film if they are greatly overcrosslinked.
Form supplied
Medium viscosity resin
Specification
| Property | Test Condition | Value | Unit | Standard |
|---|---|---|---|---|
| Hydroxyl number | 46 - 60 | mg KOH/g | M023 - ISO 4629-2 | |
| Hydroxyl content | 1.4 - 1.8 | % | M023 - ISO 4629-2 | |
| Dynamic viscosity | 23 °C | 9,000 - 13,000 | mPa·s | M058 - ISO 3219 |
| Water content | ≤ 0.1 | % | M018 - DIN 51777-1 | |
| Acid value | ≤ 4 | mg KOH/g | M019 - ISO 2114 | |
| Color | Hazen | ≤ 150 | M017 - EN 1557 |
Typical Values
| Property | Test Condition | Value | Unit | Standard |
|---|---|---|---|---|
| Equivalent weight | 1060 | g/mol | calculated based on OH content |
Solubility / thinnability
Desmophen® 1652 can be thinned with esters and ketones such as ethyl acetate, butyl acetate, methyl ethyl ketone, methylisobutyl ketone, 1-methoxypropylacetate-2, cyclohexanone and acetone. However, the solutions formed must be tested for their storage stability.
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, free from other reactive impurities).
Compatibility
Desmophen® 1652 can be combined with Desmophen® 800, 1100 and 1200 and with Desmodur® L and HL.
Compatibility testing is always advisable.
Storage
- Storage in original sealed Covestro container.
- Recommended storage temperature: {{storageTemperature}}.
- Protect from moisture, heat and foreign material.
General information: The product is slightly hygroscopic. The product is subject to hazing at low temperatures. After heating or prolonged storage at room temperature, the product should become clear and can then be used with no adverse effects on quality.
Storage time
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, 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 .
