Oil compositions containing alkyl amine or alkyl mercaptan derivatives of copolymers of an alpha olefin or an alkyl vinyl ether and an unsaturated alpha, beta-dicarboxylic copound
AssigneeConoco Inc.
InventorHanh T. Le
Life of this patent
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Abstract
Oil compositions comprisin crude oils, fuel oils, mineral oils and synthetic oils having high pour points are provided with one or more enhanced characteristics such as improved pour point, viscosity or viscosity index by the addition of alkyl amine or alkyl mercaptan derivatives of a copolymer comprising an alpha olefin or an alkyl vinyl ether and meleic anhydride.
Claims17
An oil composition which comprises a major amount of an oil selected from a crude oil or fuel oil and a minor amount of an alkyl amine or alkyl mercaptan derivative of an alpha olefin or alkyl vinyl ether and an unsaturated alpha, beta-dicarboxylic compound copolymer having pour point depressant properties said copolymer comprising the reaction product of (a) an alpha olefin having from about 2 to about 30 carbon atoms or mixtures of alpha olefins having from about 2 to about 30 carbon atoms or an alkyl vinyl ether or mixture of alkyl vinyl ethers having the formula:
- ##STR3## wherein Z.sub.1 and Z.sub.2 are the same or different, H, R.sub.1 or OR.sub.1 and R.sub.1 is an alkyl group having 1 to 30 carbon atoms, (b) maleic anhydride;
- and (c) an alkyl sulfide having the formula:
- X(R.sub.2).sub.y
- wherein X is S and R.sub.2 is an alkyl group having from about 3 to about 30 carbon atoms and y is either 1 or 2.
An oil composition which comprises a major amount of an oil selected from a crude oil or fuel oil and a minor amount of a copolymer having pour point depressant properties which is obtained by free radical polymerization of a monomeric mixture comprising from about 0.01 to about 1.0 molar percent of (a) an alpha olefin or an alkyl vinyl ether having the formula:
- ##STR4## wherein Z.sub.1 and Z.sub.2 are the same or different, H, R.sub.1 or OR.sub.1 and R.sub.1 is an alkyl group having 1 to about 30 carbon atoms, (b) from about 0.01 to about 1.0 molar percent of maleic anhydride to obtain a copolymer;
- and (c) by the reaction of from about 0.02 to about 2.0 molar percent of an alkyl sulfide with from about 0.01 to about 1.0 molar percent of the copolymer, said alkyl amine or alkyl sulfide having the formula:
- X(R.sub.2).sub.y
- wherein X is S and R.sub.2 is an alkyl group having from about 3 to about 30 carbon atoms and y is either 1 or 2.
Dependencies are inferred from the claim text.