HCID 20559081, compound → HCID 86740223, compound

Participants

Reaction Steps

The 1,3-butadiene-butyl acrylate copolymer prepared according to Example 19 is hydrogenated and isolated according to Example 18 with the exception that 1 ml. of 30% aqueous hydrogen peroxide is added to the aqueous citric acid solution to speed up isolation. Both IR and NMR spectra of the final copolymer show no olefinic absorptions (no unsaturation). GPC gives Mw=9.3×105, Mn=1.6×105, and Mw/Mn=5.7 (relative to polymethylmethacrylate). The performance of this copolymer as a VI improver is illustrated in Table II. The hydrogenated 1,3-butadiene-butyl acrylate copolymer exhibited high VIe comparable to 1,3-butadiene-ethyl acrylate copolymer of Example 18 and the 1,3-butadiene-methyl methacrylate copolymer of Example 11 at a slightly lower use level in base oil.

Provenance & Evidence