672.    DAZELEY, G. H., AND HALL, C. C.  Polymerization to Lubricating Oils of 1-Heptene and 1-Pentadecene.  Jour. Soc. Chem. Ind., vol. 67, 1948, pp. 22-23; Chem. Abs., vol. 42, 1948, p. 4738.

      1-Heptene and 1-pentadecene obtained by synthesis from allyl bromide and the appropriate Grignard reagents were each polymerized with 3-5% AlCl₃ at 0°-20° without diluent and also at 80° in a solution in the related paraffin.  No sludge formed in the low-temperature polymerization, and the polymerizates had slightly higher viscosity indexes.  This suggests that some isomerization occurred at the higher temperature.  The yields of lubricating oil were 73-93%.  All oils had viscosity indexes in the range 108-132.  The oxidation stabilities were independent of the chain length of the original olefin and were significantly better than for the polymerizates from cracked Fischer-Tropsch diesel oil previously described (abs. 673).