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US 5,211,721 AGranted
Polyoxyalkylene ester compounds and ORI-inhibited motor fuel compositions
AssigneeTexaco Inc.
InventorsRodney L. Sung, Daniel T. Daly
Life of this patent
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Abstract
Motor fuel compositions comprising gasoline are improved to control octane requirement increase (ORI) by including an ester of a carboxylic acid and a polyether polyol, preferably a polyether polyol including oxyethylene, oxypropylene and oxybutylene segments.
Claims7
An oil soluble polyether ester additive comprising the reaction product of a polyether polyol represented by the formula:
- ##STR16## in which c has a value from about 5-150, b+d has a value from about 5-150, and a+e has a value from about 2-12, with an acid represented by the formula RCOOH in which R is a hydrocarbyl radical having from 6 to 27 carbon atoms.
Dependencies are inferred from the claim text.