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US 4,284,414 AGranted
Mixed alkyl esters of interpolymers for use in crude oils
AssigneeThe Lubrizol Corporation
InventorCharles P. Bryant
Life of this patent
Estimating the term…
Abstract
Mixed alkyl esters made by reacting a mixture of two or more of certain monohydric alcohols with interpolymers derived from (i) .alpha.,.beta.-unsaturated dicarboxylic acids or derivatives thereof and (ii) vinyl aromatic monomers having up to 12 carbon atoms are useful modifiers for crude oils.
Claims9
A crude oil composition having a minor amount of at least one mixed alkyl ester made by reacting;
- (A) interpolymers having a RSV in a range from about 0.1 to about 2.0 which contain units derived from (i) at least one .alpha.,.beta.-unsaturated dicarboxylic acid, or derivative thereof and (ii) one or more vinyl aromatic monomers having up to about 12 carbon atoms, the molar ratio of (i) to (ii) being from about 1:1 to about 1:3, with
- (B) a mixture of two or more monohydric alkanols containing from 18 to 40 carbon atoms, at least one of the alkanols containing 18 carbon atoms.
A crude oil composition having a minor amount of at least one mixed alkyl ester made by reacting
- (A) one equivalent of an interpolymer having a RSV in a range of from about 0.3 to about 1.8 which contains units derived from (i) fumaric acid, maleic acid, a lower alkyl ester of one of these acids, maleic anhydride, or mixtures of two or more of these and (ii) a vinyl aromatic compound having up to about 12 carbon atoms, the molar ratio of (i) to (ii) being from about 1:1 to about 1:3, with
- (B) at least one equivalent of a mixture of monohydric alkanols containing from 18 to 40 carbon atoms, at least one of the alkanols containing 18 carbon atoms.
Dependencies are inferred from the claim text.