• Coatings

Desmophen® 680 BA

Branched OH-bearing PES combinable with Desmodur® N for 2K PU with good gloss retention, lightfastness and chalking resistance. In combination with Desmodur® L and HL for fast-drying 2K PU.

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Product Types

  • Polyester resin


Hard, Solventborne, Weather resistant

General Characterization

Branched hydroxyl-bearing polyester.
As a co-reactant for Desmodur® N/ultra N in the formulation of two-component polyurethane coatings with good gloss retention, lightfastness and chalking resistance.
Also in combination with Desmodur® L/ultra L and HL in the formulation of fast-drying two-component coatings.

Storage Conditions

- Storage in original sealed Covestro container.

- Recommended storage temperature: max. 30 °C.

- Protect from moisture, heat and foreign material.


No data available

Packaging Type

No data available

Technical Properties & Datasheets

Property Name Test Method Unit Value
Hydroxyl content DIN EN ISO 4629-2 % 2.2 ± 0.5
Water content DIN 51 777/1 % ≤ 0.1
Viscosity at 23°C DIN EN ISO 3219/A.3 mPa*s 3,000 ± 500
Hazen color value DIN EN 1557 ≤ 200
Non-volatile content 2 g resin/2 ml toluene/ 1 h 125 °C, convection oven DIN EN ISO 3251 % 70 ± 1
Acid value DIN EN ISO 2114 mg KOH/g 16 ± 3

Property Name Test Method Unit Value
Density at 20°C DIN EN ISO 2811-2 g/ml approx. 1.08
Flash point DIN EN ISO 2719 °C approx. 32
Equivalent weight approx. 770


Technical Data Sheet
Safety Data Sheet
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