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
|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
|7||Drying time to the point of 3, hours, max. at temperature (20±2) °С||2|