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Skip to content Electrical insulation resin KO-921 is a clear homogenous solution of polymethylphenylsilxane resin in organic solvents. Polymethylphenylsiloxane resin is obtained by hydrolytic co-condensation of phenyltrichlorosilane and dimethyldichlorosilane with further polymerization.
Silicone electrical insulating resin KO-921 is used in the industrial sector in the manufacture and repair of cable and wiring products, electric motors, electrical apparatus, electrical engineering, electrical machines and equipment, in industrial, construction, metallurgical, chemical, energy and other industrial facilities:
Before use, resin KO-916A must be thoroughly mixed to achieve homogeneity throughout the volume. Prepare the surface: remove dirt, degrease, dry.
Application methods: impregnation, dipping, spraying, brushing.
If necessary, KO-921 can be diluted to the desired viscosity with solvents (toluene, xylene) in an amount of max. 20%.
The application of resin KO-921 is carried out at an ambient temperature of +5°C to +30°C and a humidity of max. 80%.
Drying at room temperature. Drying time at a temperature from +15°С to +35°С is 15-20 minutes. To speed up the process can be dried in an oven at a temperature of +70°C.
Consumption for single-layer application —50-100 g/m2.
Store in sealed container at temperature from -30°С to +35°С. Keep in a cool, dry, well-ventilated place, away from heaters. Protect from moisture and direct sunlight.
The guaranteed shelf life in original container is 12 months.
Storage over the date specified on the label does not necessarily mean the product is unusable. In case if store more please check the properties of product before use.
Steel barrels up to 200 liters.
The product is flammable; please follow fire safety instructions during work. The polymerized varnish coat is nontoxic, fire-safe.
Detailed instructions are given in the relevant product safety data sheet. It can be provided upon request.
| Parameter name and measure unit | Standard | ||
|---|---|---|---|
| Appearance | Homogeneous transparent solution. Ligh opalescence is permissible. | ||
| Mass fraction of nonvolatile substances, % | 48 – 52 | ||
| Viscosity according to VZ-4 viscometer with a nozzle diameter of 4 mm at +20°C, s | 17 – 27 | ||
| The drying time of the lacquer film at (+200±5)°C to the degree of 3, minutes, max | 15 | ||
| Mass fraction of hydrogen bonded to silicon,%, max | 0,001 | ||
| The thermoelasticity of the lacquer film at (200° + 5) ˚С, h, min | 75 | ||
| Optical density, max | 0,5 | ||
| Dielectrical properties: | Test conditions | ||
| R,М(15-35)°С, 45-75% | R,M(180±2)°С,<20% | 24ч (+20±1)°С, 93% | |
| Specific volumetric electrical resistance of lacquer coating, Ohm*m, min | 1,0×1012 | 1,0×1010 | 1,0×1011 |
| Electric strength of resin coating, MV/m, min | 75 | 35 | 35 |
