Compositions – Compositions containing a single chemical reactant or plural... – Organic reactant
Patent
1975-12-05
1977-06-14
Miller, Edward A.
Compositions
Compositions containing a single chemical reactant or plural...
Organic reactant
2603468R, 260537R, C07D30736
Patent
active
040295923
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 dicarboxylic 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 et al.
patent: 3231587 (1966-01-01), Rense
Cengel John A.
Puskas Imre
Ahlers Fred R.
Gilkes Arthur G.
Gluck Irwin
McClain William T.
Miller Edward A.
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