Synthetic lubricants

Claim 1

THE PROCESS FOR PREPARING A STABLE, VISCOUS OIL OF HIGH VISCOSITY INDEX, WHICH COMPRISES: REACTING, IN A NON-OXIDIZING ATMOSPHERE AT A TEMPERATURE BETWEEN ABOUT 500* F. AND ABOUT 750* F. FOR A PERIOD OF TIME FROM ABOUT TEN HOURS TO ABOUT ONE-HALF HOUR, RESPECTIVELY, A POLYMERIC HYDROCARBON REACTION PRODUCT WITH AN ELEMENTAL SUBSTANCE SELECTED FROM THE GROUP CONSISTING OF SULFUR, SELENIUM AND TELLURIUM, THE QUANTITY OF SAID ELEMENTAL SUBSTANCE BEING FROM ABOUT 0.1 PER CENT TO ABOUT 5 PER CENT, BY WEIGHT, OF TOTAL REACTANTS, AND SAID POLYMERIC REACTION PRODUCT: HAVING A BOILING RANGE FROM ABOUT 150* F. TO ABOUT 930* F., AT WHICH MAXIMUM TEMPERATURE AT LEAST ABOUT 80 PER CENT BY WEIGHT THEREOF DISTILLS, HAVING AN AVERAGE MOLECULAR WEIGHT FROM ABOUT 150 TO ABOUT 600, AND OBTAINED BY THERMALLY AND NON-CATALYTICALLY HEATING IN THE ABSENCE OF SAID ELEMENTAL SUBSTANCE, A CHARGE CONSISTING ESSENTIALLY OF HYDROCARBONS CONTAINING AT LEAST ABOUT 80 PER CENT BY WEIGHT OF A NORMAL, ALPHA MONO-OLEFIN HAVING BETWEEN SIX AND ABOUT TWELVE CARBON ATOMS PER MOLECULE, AT A TEMPERATURE BETWEEN ABOUT 600* F. AND ABOUT 750* F. FOR A PERIOD OF TIME FROM ABOUT TWENTY HOURS TO ABOUT ONE HOUR, RESPECTIVELY.