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Complex supplies for industrial companies

КО-945

It is a homogeneous transparent solution of polymethylphenylsiloxane resin modified with epoxy resin. The solvent is toluene.

The lacquer KO-945 is characterized by:

№ п/п

Indicator name Norm

1


The presence of mechanical inclusions

Absence of

2

Appearance of varnish

Homogeneous transparent solution, slight opalescence is allowed

3

Mass fraction of nonvolatile substances,% of mass.

702

4

Viscosity according to viscometer VZ-4, s

93,0 – 160,0

5

Drying time of the lacquer film at (200 ± 5) 0С to the degree of 3, min, not more than

24 ч

6

Mass fraction of hydrogen bonded to silicon,%, not more than

0,0010

7

Thermoelasticity of lacquer film on copper at 2000С, h, not less than

70

8

Oil resistance of varnish film, N (kgf), not less than

49 (5)

9

Hardness of the varnish film on the pendulum device ME-3, not less than

при 20±50С

при 180±20С

0,45

0,13

10

Specific volumetric electrical resistance of the lacquer film, Ohm * m, not less than

М(15-350С) 45 – 75%

24ч(230С) 93%

1*1012

1*1011

11

Electric strength of the varnish film, MV / mm, not less than

М(15-350С) 45 – 75%

60

12

Оптическая плотность лака, не более

1,5

 

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