Polyisobutylene oil having a high viscosity index

Abstract

Abstract NOVEL POLYOLEFIN OILS OF MONOMERS OF THE FORMULA CH2=C(-R)-R1 WHEREIN R IS -CH3 AND -C2H5 AND R1 IS AN ALKYL GROUP OF FROM 1 TO 10 CARBON ATOMS, HAVE EXCEPTIONALLY HIGH VISCOSITY INDICES AND HIGH COEFICIENTS OF TRACTION AND CONSISTS ESSENTIALLY OF UNISOMERIZED, TRUE OLIGOMER, SUCH AS TRUE POLYISOBUTYLENE OLIGOMERS (E.G. C16H32, C20H40, C24H48 . . . C48H96). THE NOVEL OILS ARE USEFUL AS ELECTRICAL OILS, AS CHEMICAL INTERMEDIATES OR AS TRACTANTS (I.E. AS TRACTION FLUIDS OR AS COMPONENTS OF TRACTION FLUIDS). THE HYDROGENATED OILS ARE NOVEL AND ESPECIALLY USEFUL AS TRACTANTS, PARTICULARLY WHEN HYDROGENATED TO A BROMINE NUMBER LESS THAN 10 (MORE PREFERABLY, LESS THAN 5). THE UNIQUE CHARACTER OF THESE NOVEL OILS, WHETER OLEFINE AND/ OR PARAFIIN, CAN BE PROVED BY A COMBINATION OF GAS CHROMATOGRAPHY AND NUCLEAR MAGNETIC RESONANCE SPECTROSCOPY (NMR). THESE OLEFINS, AND THE PARAFFINS PRODUCED BY HYDROGENATION THEREOF ARE CHARACTERIZED BY "CROWDED" AND STERICALLY HINDERED GEMINAL METHYL AND ISOLATED METHYLENE GROUPS. THE INDIVIDUAL SPECIES IN THE RANGE OF C16 TO C48 CAN BE SEPARATED FROM THE WHOLE OIL BY VAPOR PHASE CHROMATOGRAPHY. ONE SUCH NOVEL POLYOLEFIN OIL HAVING AN ASTM VISCOSITY INDEX GREATER THAN 85, CONSISTS ESSENTIALLY OF MONOOLEFINS OF CARBON NUMBERS, C24, C28, C32, C36 AND C40 AND HAVING REPEATING ISOBUTYLENE STRUCTURES.

Inventors

• 👤 G Driscoll
• 👤 D Gates

Bibliographic Details