ELECTRIC-RESISTANT STONE MATERIAL AND METHOD FOR MANUFACTURING THE SAME

摘要

PROBLEM TO BE SOLVED: To provide an electric-resistant stone material that shows little deterioration of electric resistivity by wear and is free of environmental and toxicological problems, and a method for manufacturing the same.

SOLUTION: The electric-resistant stone material is manufactured by depositing a composition comprising (A) 100 pts.mass organopolysiloxane containing at least three Si-H bonds within the molecule and (B) 0.0001-10 pts.mass platinum catalyst onto a surface of a dried natural stone having a particle size of 5-50 mm and subjecting the same to a heat treatment. The dried natural stone acquires water repellency and water non-retentivity through a water-repellent silicone layer free of environmental and toxicological problems and thus never contains water and repels water when being walked on by humans or exposed to water, thereby retaining high electric resistance for a long period of time. Step voltage or contact voltage can be reduced by placing the natural stone around electrical facilities etc.

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