Polybutenylsuccinic anhydride production

Details Polybutenylsuccinic anhydride production Polybutenylsuccinic anhydride production

1973-05-10

1976-06-01

Moatz, Harry I.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C-metal

260 338UA, 526 22, 526 74, 526137, C07D30760

Patent

active

039609006

ABSTRACT:
Viscous polybutenes of number average molecular weight (M.sub.n) in the range of about 300 to about 3000 have improved reactivity with intramolecular anhydrides of unsaturated aliphatic dicarboxlyic acids when such polybutenes contain rather small amounts, i.e., 5 to 200 ppm, of halogenated, preferably chlorinated and/or brominated aliphatic or aromatic hydrocarbons. Preference is given to such halogen containing compounds having a sufficient vapor pressure at a temperature in the range of 100.degree. to 300.degree.C to be substantially completely removed at absolute pressures in the range of 5 to 760 mm Hg. Use of such polybutenes containing such halogenated compounds in the addition reaction with said unsaturated anhydrides can reduce formation of undesired tarry product resulting from polymerization and/or thermal decomposition of the unsaturated anhydrides and with further use of phenothiazine or substituted phenothiazine at 5-200 ppm concentrations on the polybutene substantially eliminate formation of such tarry product.

REFERENCES:
patent: 2360426 (1944-10-01), Kyrides
patent: 3018250 (1962-01-01), Anderson
patent: 3231587 (1966-01-01), Reuse

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