Organic esters for lubricating compositions
AssigneeSnamprogetti S.p.A.
InventorsGiuseppe Mancini, Luigi Imparato
Life of this patent
Estimating the term…
Abstract
An ester, adapted for use as a component of a multigrade lubricating oil, is prepared by reacting: A. A mixture of bifunctional and trifunctional polyols wherein the molar ratio of the bifunctional polyols to the trifunctional polyols is in the range of 1:2.5 to 1:10; and B. A mixture of linear monocarboxylic acids containing from 6 to 8 carbon atoms, wherein the molar average is C.sub.7, and of linear monocarboxylic acids containing from 12 to 18 carbon atoms, the molar ratio of the C.sub.6 to C.sub.8 acids and the C.sub.12 to C.sub.18 acids being in the range of from 4:1 to 19:1.
Claims9
A mixture of esters for a lubricating composition that is prepared by a process which consists of the esterification of:
- A. a mixture of bifunctional and trifunctional neopentylpolyols wherein the molar ratio of the bifunctional neopentylpolyols to the trifunctional neopentylpolyols is in the range of 1:2.5 to 1:10;
- and
- B. a mixture of linear monocarboxylic acids containing from 6 to 8 carbon atoms, wherein the molar average is C.sub.7, and of linear monocarboxylic acids containing from 12 to 18 carbon atoms, the molar ratio of the C.sub.6 to C.sub.8 acids and the C.sub.12 to C.sub.18 acids being in the range from 4:1 to 19:1.
An ester that is prepared by a process which consists of the esterification of:
- (a) 0.89 moles of trimethylolpropane;
- (b) 0.11 moles of neopentylglycol;
- (c) 0.574 moles of hexanoic acid;
- (d) 1.1767 moles of heptanoic acid;
- (e) 0.574 moles of acetanoic acid;
- (f) 0.2583 moles of lauric acid;
- and
- (g) 0.287 moles of palmitic acid.
An ester that is prepared by a process which consists of the esterification of:
- (a) 0.16 moles of neopentylglycol;
- (b) 0.64 moles of trimethylolpropane;
- and
- (c) 2.24 moles of a mixture of 90% by weight of heptanoic acid;
- 5% by weight of palmitic acid;
- 5% by weight of stearic acid.
An ester that is prepared by a process which consists of the esterification of:
- (a) 0.8 moles of trimethylolpropane;
- (b) 0.2 moles of neopentylglycol;
- and
- (c) 2.8 moles of a mixture of 87.74% by weight of heptanoic acid;
- 2.88% by weight of dodecanoic acid;
- 4.82% by weight of palmitic acid and 4.82% by weight of stearic acid.
Dependencies are inferred from the claim text.