POWERSIL® 402 A/B

Electrically conductive

• Cable accessories
• Electrodes
• Deflectors
• Adhesion promotor for molding RTV-2/LSR onto conductive silicone rubber

• After stirring up, A and B-component both have to be mixed in the ratio 1 : 1 by thorough stirring. At room temperature the pot life is at least 3 days.
• Surfaces to be treated should be dry and free of grease, oil and other contaminants. For cleaning chemically pure solvents e. g. acetone can be used. The dispersion of POWERSIL® 402 A/B can be applied by dipping, spraying and with a brush.
• For electrically conductive coatings we recommend a curing - after air drying for approx. 5 min at room temperature - of at least 30 min at 150°C.
• POWERSIL® 402 A/B can also be used as adhesion primer for overmoulding parts made from conductive silicone rubber with RTV-2/LSR silicone rubbers. For adhesion promoting (e.g. for deflectors) POWERSIL® 402 A/B should be vulcanized - after air drying for approx. 5 min at room temperature - for 20 min at 140 - 150 °C in a circulating air oven.
• Casting with a RTV-2/LSR silicone rubber should take place at the latest after 24 h. It appeared that the adhesion after heat vulcanization (e.g. 100 °C) mostly is better than after room temperature curing.
• If for the application of POWERSIL® 402 A/B a higher mixing viscosity is desired a catalyzation of only the A component is possible. After stirring up 0.1 % Catalyst EP is added and stirred thoroughly. By dilution with chemical pure Xylene the desired mixing viscosity (> 500 mPa s) can be adjusted.
• As a general rule the individual processing conditions must be optimized for the specific application. Various substances can poison the platinum catalyst and delay vulcanization or, in extreme cases, prevent it entirely.
• Particularly critical catalyst poisons are: Sulfur, polysulfides, polysulfones and compounds containing sulfphur, such as natural and synthetic rubber. Amines, urethanes and substrates containing amines, such as polyurethanes, epoxy resins etc. Organometallic compounds, especially organo-tin, and substances containing such compounds. Sticky areas are signs of inhibition.

• Low volume resistivity
• Adhesion promoting primer
• Suitable for various coating techniques like dipping, brushing or spraying

Cured Properties: Cured for 30 min at 150°C in a circulating air oven.