Lactone oxazolines as oleaginous additives
AssigneeExxon Research & Engineering Co.
InventorsStanley J. Brois, Antonio Gutierrez
Life of this patent
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Abstract
Lactone oxazoline reaction products of hydrocarbon substituted lactone carboxylic acids, for example, polybutyl lactone carboxylic acid, with 2,2-disubstituted-2-amino-1-alkanols, such as tris-(hydroxymethyl)aminomethane (THAM), and their derivatives are useful additives in oleaginous compositions, such as sludge dispersants for lubricating oil, or anti-rust agents for gasoline.
Claims8
A lactone oxazoline reaction product obtained from heating together an equimolar mixture of a hydrocarbon-substituted lactone acid material selected from the group consisting of acids, amides and esters, and a 2,2-disubstituted-2-amino-1-alkanol having 1 to 3 hydroxy groups and containing a total of 4 to 8 carbons at a temperature of from 100.degree.-240.degree. C. until infra-red absorption for oxazoline is maximal indicating completion of the oxazoline reaction.
A lubricating oil composition comprising:
- a major amount of lubricating oil and 0.01 to 20 wt. % of an oil-soluble, lactone oxazoline reaction product obtained from heating together a molar proportion of a C.sub.4 -C.sub.400 hydrocarbon substituted lactone acid material selected from the group consisting of acids, amides and esters;
- and one molar proportion of a 2,2-disubstituted-2-amino-1-alkanol having 1 to 3 hydroxy groups and containing a total of 4 to 8 carbons at a temperature of from 100.degree.-240.degree. C. untiil cessation of water evolution indicating completion of the oxazoline reaction.
An additive concentrate comprising:
- an amount of mineral lubricating oil in the range of 10 to 80 parts by weight, 20 to 90 parts by weight of a lactone oxazoline of one molar proportion of a hydrocarbon substituted C.sub.4 -C.sub.10 mono-unsaturated lactone acid material selected from the group consisting of carboxylic acid, ester and amide thereof, having more than 8 carbon atoms in said hydrocarbon substituent;
- reacted with about one molar proportion of a 2,2-disubstituted-2-amino-1-alkanol having 1 to 3 hydroxy groups and containing a total of 4 to 8 carbons of the formula:
- ##STR25## wherein X is alkyl or hydroxy alkyl, said alkyl groups having 1 to 3 carbon atoms, and at least one of said X is a hydroxy alkyl group of the structure --(CH.sub.2).sub.n OH where n is 1 to 3;
- at a temperature in the range of about 100.degree. to 240.degree. C. until cessation of water evolution indicating completion of the oxazoline reaction.
Polyisobutyl lactone-[5,5-bis-(hydroxymethyl)oxazoline-2].
A process for preparing lactone oxazolines comprising the step of heating together equimolar amounts of an alkyl lactone acid material selected from the group consisting of acids, amides and esters and a 2,2-disubstituted-2-amino-1-alkanol having 2 to 3 hydroxy groups and containing a total of 4 to 8 carbons of the formula:
- ##STR26## wherein X is alkyl or hydroxy alkyl, said alkyl groups having 1 to 3 carbon atoms, and at least one of said X is a hydroxy alkyl group of the structure --(CH.sub.2).sub.n OH where n is 1 to 3;
- at a temperature in the range of about 100.degree. to 240.degree. C. until cessation of water evolution indicating completion of the oxazoline reaction.
Dependencies are inferred from the claim text.