FEATURES
Resin KO-921 (SRE 21)* 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.
APPLICATIONS
- The electric machines and apparatus protection from mold and fungi
- Glass winding of wires and cables impregnation. It is also used as impregnating and coating varnish, operating at +250°C
- In food industry, the varnish is used as release agent for metal forms for baking meat
- As a protective coat for metal forms for baking bread and biscuits
Advantages
- Low drying temperature
- Good dielectric properties
- Good heat resistant (up to +250°С)
- Protects the electric machines and apparatus from mold and fungi
- Safe for food industry using (as a release coating for baking metal molds)
PHYSICAL AND CHEMICAL PROPERTIES
| Name of parameter and unit of measure | Standard | ||
| Mass content of nonvolatile substances, % | 50 ± 2 | ||
|
Viscosity at 20°C, by viscometer VZ-246 with orifice Ø 4 mm, s |
17-27 | ||
| Dryout time, 3rd degree, (200±5)°C, minutes, max. | 15 | ||
| Weight of Si-bound hydrogen, %, max. | 0,001 | ||
| Thermoelasticity at 200°C, h, min. | 75 | ||
| Optical density, max. | 0,5 | ||
| Dielectric properties | Test conditions | ||
| R,М(15-35°С) 45-75% | R,M(180°С) <20% |
24h(23°С)93% M(15-35°C)45-75% |
|
| Varnish coat volume resistivity, Ω·m, min. | 1,0×1012 | 1,0×1010 | 1,0×1011 |
| Electric strength, MV/m, min. | 75 | 35 | 35 |
SAFETY INFORMATION
The polymerized varnish coat is nontoxic, fire-safe.
GUARANTEED SHELF LIFE 12 MONTHS
* various products names are allowed for different markets