Oil compositions
AssigneeInfineum International Limited
InventorsBeatrice N. Cattoz, Peter M. Wright, Andrew Dove, Rachel O'Reilly, Cinzia Clamor
Life of this patent
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Abstract
An oil composition comprises at least 50 percent by mass, based on the mass of the composition, of an oil and 0.01 to 25 percent by mass, based on the mass of the composition, of a polymer comprising at least one poly(lactone) segment. The at least one poly(lactone) segment is derived from a lactone substituted by one or two hydrocarbyl groups, or substituted hydrocarbyl groups, at least one such group having at least 4 carbon atoms. The oil compositions are suitable for use in the lubrication of the crankcase of internal combustion engines.
Claims23
An oil composition comprising
- at least 50 percent by mass, based on the mass of the composition, of an oil and
- 0.01 to 25 percent by mass, based on the mass of the composition, of a block copolymer comprising at least one poly(lactone) segment;
- wherein the block copolymer comprises units (a):
- —C(O)(CHR1)pO— (a)
- wherein p is an integer from 4 to 7;
- wherein in one, two or three instances p, R1 is a hydrocarbyl group or substituted hydrocarbyl group having from 6 to 24 carbon atoms, and in all other instances p, R1 is hydrogen;
- and, units (b):
- —C(O)(C(H)xR2)qO— (b)
- wherein units (b) are different from units (a);
- wherein q is an integer from 4 to 15;
- and
- wherein either
- (i), in all instances q, R2 is hydrogen, or
- (ii), wherein
- in one, two or three instances q, R2 is a hydrocarbyl group or substituted hydrocarbyl group having from 1 to 24 carbon atoms, and
- in all other instances q, R2 is hydrogen;
- and
- wherein either
- in all instances q, x is 1, or
- for two contiguous moieties q, x is zero such that units (b) comprise one carbon-carbon double bond, and
- in all other instances q, x is 1.
An oil composition comprising:
- at least 50 percent by mass, based on the mass of the composition, of an oil and
- 0.01 to 25 percent by mass, based on the mass of the composition, of a block copolymer comprising at least one poly(lactone) segment;
- wherein the block copolymer comprises units (a):
- —C(O)(CHR1)pO— (a)
- wherein p is an integer from 4 to 7;
- wherein in one, two or three instances p, R1 is a hydrocarbyl group or substituted hydrocarbyl group having from 4 to 24 carbon atoms, and in all other instances p, R1 is hydrogen;
- and
- units (b):
- —C(O)(C(H)xR2)qO— (b)
- wherein units (b) are different from units (a);
- wherein q is an integer from 4 to 15;
- and
- wherein either
- (i), in all instances q, R2 is hydrogen, or
- (ii), wherein
- in one, two or three instances q, R2 is a hydrocarbyl group or substituted hydrocarbyl group having from 1 to 24 carbon atoms, and
- in all other instances q, R2 is hydrogen;
- and
- wherein either
- in all instances q, x is 1, or
- for two contiguous moieties q, x is zero such that units (b) comprise one carbon-carbon double bond, and
- in all other instances q, x is 1.
Dependencies are inferred from the claim text.