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Press Releases

WACKER Unveils New Electrically Conductive Silicone Rubber Dispersion for the Cable Industry

Munich, Oct 19, 2016

WACKER, the Munich-based chemical group, is presenting a novel electrically conductive silicone rubber dispersion at the 20th International Trade Fair for Plastics and Rubber K 2016. POWERSIL® 403 has been developed for manufacturing the outer conductive film on cable accessories for transmission and distribution cables. The product yields a conductive coating characterized by high elasticity, good mechanical properties and scrub resistance. This makes the dispersion suitable even for cable fittings to be installed via cold-shrink processes. The product contains no aromatic compounds such as toluene. K 2016 takes place in Düsseldorf, Germany, from October 19 to 26, 2016.

Siliconkautschuk-Dispersion
WACKER’s new POWERSIL® 403 silicone rubber dispersion helps make sleeves for transmission and distribution cables safe to operate for long periods of time. The dispersion, which contains no aromatics, forms a conductive film on the insulating silicone, protecting the material from electrostatic charging. POWERSIL® 403 is flexible and resists abrasion. Sleeves that have been coated in this way can be shipped in their extended state and installed on cable connectors on site using cold-shrink processes.

In the transmission and distribution industry, cable joints and con-nectors are coated on the outside with an electrically conductive material. The purpose of this conductive film is to minimize the electric load on the insulating layer and, in so doing, ensure that the fittings can be operated safely for long periods of time. The conductive material is applied in a thin layer as a liquid dispersion, after which it cures to form a solid material. Cable accessories used in the transmission and distribution industry include cable joints and terminations.

The new POWERSIL® 403 silicone rubber dispersion likewise forms this kind of electrically conductive film. The two-component formulation contains addition-curing silicone rubber, which adheres well to the insulating silicone substrate while forming a flexible film. Elongation at break is roughly 650 percent for this formulation, and its tear strength is 20 newtons per millimeter. This means that a conductive film made from POWERSIL® 403 can withstand extreme elongation – without cracking – such as occurs during the production and installation of cable accessories suitable for cold-shrink processes.

Tiny carbon-black particles are what make POWERSIL® 403 electrically conductive. During the curing process, these particles combine with the silicone elastomer to form an abrasion-resistant, conductive layer of carbon black that is largely unaffected by the mechanical stress that can arise during packaging, transport or installation.

The product also meets increasingly frequent demands for formulations that contain no aromatics and, as such, are more user friendly. POWERSIL® 403 is free of aromatic solvents such as toluene. The low-viscosity liquid can be easily applied by spraying, dipping, or brushing. Its electrical properties also make the dispersion suitable for use in antistatic coatings for textiles.

Visit WACKER at K 2016 in Hall 6, Booth A10.

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Wacker Chemie AG
Media Relations & Information
Florian Degenhart

Tel. +49 89 6279-1601
Email florian.degenhart@wacker.com
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