Methylene bis-phenol alkanoic acid compounds
AssigneeEdwin Cooper, Inc.
InventorsJohn Scotchford Elliott, Bryan Terence Davis, Richard Martin Howlett
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Abstract
Novel compounds, useful as intermediates in the preparation of lubricant additives, are described by specified general formulae and as condensation products of (i) an alkyl-substituted monohydric phenol, phenol sulphide or alkylene bis-phenol in which the alkyl substituent contains at least 8 carbon atoms and (ii) a carbonyl-substituted compound selected from the group consisting of glyoxylic acid, pyruvic acid, levulinic acid, 3-oxoglutaric acid, 2-oxoglutaric acid and esters of such acids.
Claims7
A compound having the general formula:
- ##SPC8##
- wherein each R.sup.1 is the same or different and is an alkyl group containing at least 8 carbon atoms;
- R.sup.2 is absent or is a group of the formula:
- ##SPC9##
- in which m is zero or is an integer;
- R.sup.3 is absent or is a group of the formula:
- ##SPC10##
- in which p and q are the same or different and are zero or are integers;
- each R.sup.4 is the same or different and is absent or is a group of the formula --Z--R.sup.6 in which Z is selected from the group consisting of a sulphur atom and a chain of at least two sulphur atoms or is absent and R.sup.6 is selected from the group consisting of an alkyl group and hydroxy-substituted monocyclic hydrocarbon aryl, aralkyl and alkaryl groups;
- each R.sup.5 is the same or different and is selected from the group consisting of a hydrogen atom, a methyl group and a group of formula -CH.sub.2 -.sub.n ##EQU7## each n is the same or different and is zero or an integer of from 1 to 2;
- and each Y is the same or different and is selected from the group consisting of a hydroxyl group and an alkoxy group.
A condensation product formed by the condensation of a phenolic compound selected from the group consisting of alkyl-substituted monohydric phenols, phenol sulfides and alkylene bis-phenols of the formula:
- ##SPC11##
- with a carbonyl-substituted compound selected from the group consisting of glyoxylic acid, pyruvic acid, levulinic acid, 3-oxoglutaric acid, 2-oxoglutaric acid and lower alkyl esters of such acids,
- wherein R.sup.1 is an alkyl group containing at least 8 carbon atoms R.sup.4 is hydrogen, or is a group of the formula -Z-.sub.r R.sup.6, where Z is sulfur and r is an integer of from 0 to 4;
- when r is 0, R.sup.6 is C.sub.1-8 alkyl or ##EQU9## where R.sup.7 is hydrogen or an alkyl group and R.sup.8 is a phenol or alkyl substituted phenol residue and when r is 1-4, R.sup.6 is a phenol or alkyl substituted phenol residue.
Dependencies are inferred from the claim text.