Lactone-modified ester oils
AssigneeBayer Aktiengesellschaft
InventorsRolf Dhein, Karl-Heinz Hentschel, Karl Nutzel, Klaus Morche, Wolfgang Schule
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Abstract
Esterification products of monoalcohols and dicarboxylic acids, or of polyhydric alcohols and monocarboxylic acids respectively, containing 5 to 45% by weight of units of hydroxycarboxylic acids and having a ratio of carbon to oxygen atoms greater than 4.1 obtained from (a) aliphatic C.sub.1 -C.sub.14 alcohols, (b) aliphatic C.sub.4 -C.sub.18 carboxylic acids and optionally cycloaliphatic C.sub.6 -C.sub.12 and aromatic C.sub.7 -C.sub.12 carboxylic acids, and (c) lactones of aliphatic C.sub.5 -C.sub.12 hydroxycarboxylic acids. They are suitable for the preparation of lubricants and lubricant compositions.
Claims8
Esterification products of
- (a) aliphatic C.sub.1 -C.sub.14 alcohols containing one or more alcoholic hydroxyl groups;
- (b) aliphatic C.sub.4 -C.sub.18 mono- or di-carboxylic acids which may optionally be replaced by up to 55 mole percent of cycloaliphatic C.sub.6 -C.sub.12 carboxylic acids and up to 5 mole percent of aromatic C.sub.7 -C.sub.12 carboxylic acids, and
- (c) 6 to 9-membered lactones of aliphatic C.sub.5 -C.sub.12 hydroxycarboxylic acids,
- wherein:
- the units derived from the lactones make up from 5 to 45% by weight of the esters;
- the ratio of carbon to oxygen atoms is greater than 4.1 and
- either monoalcohols (a) and dicarboxylic acids (b) or polyhydric alcohols (a) and monocarboxylic acids (b) are used for producing the ester oils.
Dependencies are inferred from the claim text.