Process of impregnating unfired inorganic body with organosilicon compounds and article resulting therefrom

Claim 1

IN THE PROCES OF IMPREGNATING AN UNFIRED, RELATIVELY POROUS, MOLDED INORGANIC BODY WITH ORGANOSILIXANES TO IMPROVE THE ELECTRICAL INSULATING PROPOERTIES THEREOF, THE STEPS COMPRISING APPLYING TO THE EXPOSED SURFACES OF THE INORGANIC BODY A THIN COATING OF AN ORGANOSILANE HAVING ATTACHED TO EACH SILICON ATOM AN AVERAAGE OF FROM ONE TO THREE HYDROLYZABLE MONOVALENT AMINO RADICALS, AND THE REMAINING SUBSTITUENTS ON SILICON BEONG SELECTED FROM THE GROUP CONSISTING OF HYDROCARBON AND HYDROCARBONOXY RADICALS, APPLYING SUFFICIENT WATER TO HYDROLYZE THE AMINOSILANE COATING, HEATING THE APPLIED WATER AND AMINOSILANCE COATING TO A TEMPERATURE ABOVE 100* C. FOR AT LEAST ONE HOUR TO HYDROLYZE, DEHYDRATE AND CONDENSE THE APPLIED AMIMOSILANE AND WATER COATING TO AN ORGANOSILANE FILM ADHERENT TO AND COVERING ALL THE EXPOSED SURFACES OF THE INORGANIC BODY, THEREAFTER MPREGNATING THE BODY IN A HEATHARDENABLE, PARTIALLY CONDENSED, HYDROCARBON ORGANOSILOXANE CONTAINING AN AVERAGE OF FROM MORE THAN ONE TO LESS THAN TWO HYDROCARBON RADICALS PER SILICON ATOM, AND HEAT HARDENING THE APPLIED HYDROCARBON ORGANOSILOXANE.