Bayhydrol® U 2750
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About
Product Types
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Material
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General Characterization
Bayhydrol U 2750 is an aliphatic, hydroxyfunctional polycarbonate ester-polyurethane dispersion, cosolvent-free.
It is used as a binder for the formulation of water-reducible two-component polyurethane coatings.
It is used as a binder for the formulation of water-reducible two-component polyurethane coatings.
Storage Conditions
Bayhydrol U 2750 should be stored in tightly sealed original containers and protected from freezing, heat, and foreign materials. The product is sensitive to freezing. Prologed freezing can damage the product irreversibly. Prolonged storage at higher temperatures may result in a decrease of viscosity and/or an increase of average particle size, possibly resulting in sedimentation or coagulation.
The viscosity of the product is largely governed by the pH. As the pH may decrease during storage, a decrease in viscosity is also to be expected. The viscosity can be restored to its original value by the addition of small amounts of an aqueous 10% solution of dimethyl ethanol amine. Recommended storage temperature is 5º-30ºC.
The viscosity of the product is largely governed by the pH. As the pH may decrease during storage, a decrease in viscosity is also to be expected. The viscosity can be restored to its original value by the addition of small amounts of an aqueous 10% solution of dimethyl ethanol amine. Recommended storage temperature is 5º-30ºC.
Sampling
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Packaging Type
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Technical Properties & Datasheets
Characteristics
| Property Name | Test Method | Unit | Value |
|---|---|---|---|
| Acid number (solid resin) | mg KOH/g | 25.0 - 29.0 | |
| OH content (solid resin) | % | approx. 3.6 | |
| Density at 20°C | g/ml | approx. 1.06 |
Specifications
| Property Name | Test Method | Unit | Value |
|---|---|---|---|
| Viscosity at 23°C, (D = 40s^-1) | mPa∙s | 100 - 1,500 | |
| Non-volatile content (1g/1h/125°C) | % | 39.0 - 43.0 | |
| pH (supply form) | 7.0 - 9.0 |
Downloads
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Technical Data Sheet
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Safety Data SheetNo direct download available, please visit www.productsafetyfirst.covestro.com
