Varnish BT-577
October 2, 2018
Varnish VL-51
October 2, 2018
Varnish VL-725, VL-725Г
Composition
Varnishes are made on the basis of polyvinyl butyral, phenol formaldehyde resin K-421-02 and alkyd non-drying resin No. 80. Varnish VL-725 G differs from varnish VL-725 by a higher (by 2-3 times) content of nonvolatile substances and increased viscosity. Enamel VL-725 is prepared immediately before use by mixing 100 mass. including varnish VL-725 and 2.75 masses. including aluminum powder PAP-2.
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Purpose (VL-725, VL-725G)
VL-725 lacquer is used to create a coating for corrosion protection of steel products and products made from aluminum alloys.
Varnish VL-725 G is used for sealing magnesium and aluminum castings.
Application
Lucky applied by spraying, brushing, dipping.
Technical characteristics (VL-725, VL-725G)
| Name of the indicator | Value |
| Color and appearance of the film | colorless flat surface without whitish stripes, bubbles and mechanical inclusions, for enamel – silver |
| Conditional viscosity on the VZ-246 viscometer with a nozzle diameter of 4 mm at a temperature of (20.0 ± 0.5) ° С, s | |
| for varnish VL-725 | 10-16 |
| for varnish VL-725g | 18-24 |
| Mass fraction of nonvolatile substances,% | |
| for varnish VL-725 | 5.0-8.0 |
| for varnish VL-725g | 14.5-1.0 |
| Drying time to degree 3 at a temperature (115-120) ° С, h, not more | |
| for varnish VL-725 | four |
| for varnish VL-725g | four |
| for enamel VL-725 | four |
| Flexural elasticity of the film, mm, not more | |
| for varnish VL-725 | one |
| for enamel VL-725 | one |
| Resistance of the film to static exposure to water, fuel and aviation oil at a temperature of (60-70) ° С, h, not less (for VL-725g varnish) | five |
