Alkyd Urethane Varnish АU7(AL)-52N
Technical Specifications У 24.3-24010285-003:2007
Alkyd Urethane Varnish АU7(AL)-52N is a solution in white spirit of alkyd varnish. The solution is modified by sunflower oil or soyabean oil and pentaerythritol, as well as aliphatic diisocyanate.
Application: Varnishes, containing aromatic isocyanates, form coatings with high hardness, wear resistance, water- and chemical resistance, as well as good adhesion. They have high lightfastness. They shall be used in the formulations of yacht varnishes, wood varnishes, fast-drying priming coats and atmosphere resistant enamels.
Table: Qualitative indices according to Technical Specification У 24.3-24010285-003:2007
| № | Description | Requirements as to Technical Documentation |
| 1 | Colour (iodimetry scale), mg I2/100 cm3, not darker than
·superior quality ·first quality |
20 60 |
| 2 | Appearance | Transparent, some opalescence is allowed |
| 3 | Purity | Varnish coat, applied on glass plate, shall be transparent without any mechanical inclusions and small extrinsic particles |
| 4 | Relative viscosity at temperature /20±0.5/°С (viscosimeter ВЗ-246, nozzle diameter 4 mm), с | 140 – 240 |
| 5 | Weight fraction of nonvolatile matter, % | 50 – 55 |
| 6 | Hardness of varnish film as to pendulum
ТМЛ (type А), standard units, min. ·in one day ·in 7 days |
0.20 0.30 |
| 7 | Drying time to the point of 3, hours, max. at temperature (20±2) °С | 2 |
