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Allgemeine Charakterisierung
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.
Lagerungsbedingungen
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.
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Technische Eigenschaften & Datenblätter
Genannte Eigenschaften Merkmale
| Name der Eigenschaft | Prüfverfahren | Einheit | Wert |
|---|---|---|---|
| Density at 20°C | g/ml | approx. 1.06 | |
| Acid number (solid resin) | mg KOH/g | 25.0 - 29.0 | |
| OH content (solid resin) | % | approx. 3.6 |
Genannte Eigenschaften Spezifikation
| Name der Eigenschaft | Prüfverfahren | Einheit | Wert |
|---|---|---|---|
| Non-volatile content (1g/1h/125°C) | % | 39.0 - 43.0 | |
| Viscosity at 23°C, (D = 40s^-1) | mPa∙s | 100 - 1,500 | |
| pH (supply form) | 7.0 - 9.0 |
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