Compositions – Compositions containing a single chemical reactant or plural... – Organic reactant
Patent
1975-05-19
1976-10-12
Engle, Samuel W.
Compositions
Compositions containing a single chemical reactant or plural...
Organic reactant
260 297B, 260 297N, 260 458N, 2603468R, C09K 300, C08L 100, C08K 500, C07D30760
Patent
active
039856720
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 brominated dialkylhydantoin. Preference is given to such bromine 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 brominated 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 enhance yield of desired alkenyl-substituted anhydride.
REFERENCES:
patent: 2845403 (1958-07-01), Gunberg
patent: 3033832 (1962-05-01), Serniuk
Cengel John A.
Puskas Imre
Ahlers Fred R.
Engle Samuel W.
Gilkes Arthur G.
McClain William T.
Standard Oil Company (Indiana)
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