High voltage electric insulators made of resins-bonded...

H - Electricity – 01 – B

Patent

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26/142, 337/90

H01B 3/00 (2006.01) H01B 17/02 (2006.01) H01B 17/32 (2006.01)

Patent

CA 1121474

ABSTRACT OF THE DISCLOSURE The present invention is concerned with an electric insulator for average, high, and very high voltages, charac- terized in that the ribbed coating thoroughly coats a supporting central body and is made of an ethylene-propylene elastomer (EPR) having high elastic,anti-tracking, anti-erosion, ageing resistant, self-extinguishing, and water-repellency charac- teristics, said ribbed coating being shaped as ribs and supported by a sleeve-shaped tubular layer prepared from an ethylene-propylene elastomer (EPR) of qualities and charac- teristics identical with those of the EPR elastomer constituting said ribs. The coupling of said ribbed elastomeric coating with said central body, of said ribs with said sleeve, and of self-curing at room temperature,based on low-unsaturation olefinic polymers, analogous and compatible with the ethylene- propylene blend (EPR) of which the ribbed coating is made.The present invention is concerned also with the process to obtain the same. The electric insulator according to the invention shows a radical and definitive solution of the problem of achieving a perfect adherence between the r.b.g.f. body and the ribbed coating.

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