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  • Coatings, paints & inks

Bayhydrol® UH 2558

Aliphatic, anionic polyurethane dispersion.Binder for the formulation of water-reducible coatings and sealers.

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About

Product Types

  • Dispersion
  • PU dispersion
  • PU dispersion - high molecular
  • Waterbased dispersion
  • Non-reactive system
  • Polyurethane

Material

Coatings, paints & inks
Solvent-free, Waterborne, Flexible, Elastic

General Characterization

No data available

Storage Conditions

No data available

Sampling

No data available

Packaging Type

No data available

Technical Properties & Datasheets

Applications

The product is characterized by high resistance to yellowing, very good wet film transparency and very good abrasion resistance (taber).Films are hard but flexible. Post-curing of such coatings with Bayhydur®, for example, brings additional significant advantages and results in waterborne two-component coatings with significantly higher mechanical and chemical resistance. The mixing ratio of mill base to hardener is generally 10 : 1. Compatibility with affordable PAC dispersions is good but must be tested on a case-by-case basis.

Form supplied

Approx. 37 % in water, neutralized with triethylamine, approx. 37 : 62 : 1

Specification

Property Test Condition Value Unit Standard
Non-volatile content (1 g/1 h/125 °C) 35 - 39 % DIN EN ISO 3251
Viscosity at 23 °C,(D = ca. 40 s^(-1) < 100 mPa∙s DIN EN ISO 3219/A.3
pH 7 - 9 DIN ISO 976

Typical Values

Property Test Condition Value Unit Standard
Mean particle size approx. 60 nm photon correlation spectroscopy
Density at 20 °C approx. 1,05 g/ml DIN EN ISO 2811-2

Solubility / thinnability

The product is soluble in water.

Storage

- Storage in original sealed Covestro containers. - Recommended storage temperature: > 0 - 30 °C. - Protect from frost, heat and foreign material. General information: The product is sensitive to frost. 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.Contamination with certain bacteria, fungi or algae may render the product unusable.

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.

Downloads

Technical Data Sheet
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Safety Data Sheet
No direct download available, please visit www.productsafetyfirst.covestro.com
Download

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