Hydrogenated polymers with a radial structure having a core based on calixarenes and use thereof in lubricant compositions

Patent metadata

Field	Value
Publication number	US-11078437-B2
Application number	US-202016773964-A
Country	US
Kind code	B2
Filing date	Jan 27, 2020
Priority date	Apr 17, 2014
Publication date	Aug 3, 2021
Grant date	Aug 3, 2021

Abstract

Hydrogenated polymers with a radial structure having a core made up of calixarenes of the general formula (I), to the core of which is linked a number P of hydrogenated linear polymer segments selected from: —hydrogenated homopolymers or co-polymers of conjugated dienes; or—hydrogenated co-polymers of said conjugated dienes and monoalkenyl arenes, and—mixtures thereof said formula (I) in which: —R 1 , R 2 , R 3 and R 4 are independently selected from hydrogen; a group containing carbon and hydrogen; a group also containing heteroatoms in addition to carbon and hydrogen; a group also containing silicon in addition to carbon, hydrogen and heteroatoms; —one of the two substituents R 5 and R 6 is hydrogen, while the other may be hydrogen or alkyl, with a number of carbon atoms between 1 and 6, preferably methyl and ethyl; —n is an integer in the range between 4 and 16.

First claim

The invention claimed is:

1. Lubricant composition containing one or more hydrogenated polymers with a radial structure having a core made up of calixarenes of the general formula (I), to the core of which is linked a number P of hydrogenated linear polymer segments selected from:
hydrogenated homopolymers or copolymers of conjugated dienes; or
hydrogenated copolymers of said conjugated dienes and monoalkenyl arenes, and
mixtures thereof,
said formula (I) being

in which:
R 1 , R 2 , R 3 and R 4 are independently selected from hydrogen; a group containing carbon and hydrogen; a group also containing heteroatoms in addition to carbon and hydrogen; a group also containing silicon in addition to carbon, hydrogen and heteroatoms;
one of the two substituents R 5 and R 6 is hydrogen, while the other may be hydrogen or alkyl, with a number of carbon atoms between 1 and 6;
n is an integer in the range between 4 and 16.

2. Lubricant composition containing one or more radial polymers according to claim 1 in solution with one or more lubricant base oils.

3. Lubricant composition according to claim 2 , in which the lubricant base oils are selected from synthetic oils, mineral oils, vegetable oils, or oils of animal origin and mixtures thereof.

4. Lubricant composition according to claim 1 , in which the hydrogenated radial polymers are used in a total concentration, expressed as a weight percentage of the polymer in the finished lubricant oil, between 0.1 and 5.

5. Lubricant composition according to claim 1 further containing one or more additives selected from detergent additives, dispersant additives, antioxidant additives, friction-modifier additives, antiwear and extreme pressure additives, corrosion inhibitors, pour point-depressant additives, foam inhibitors or emulsifiers.

6. Lubricant composition according to claim 1 wherein one of the two substituents R 5 and R 6 is hydrogen, while the other is an alkyl, with a number of carbon atoms between 1 and 6.

Assignees

• Eni Spa
• Versalis Spa

Inventors

• Notari Marcello
• Cavallo Claudio
• Roselli Alberto
• Casnati Alessandro
• Sansone Francesco
• Burlini Alessandro

Classifications

• C10M2209/101

  Condensation polymers of aldehydes or ketones and phenols, e.g. Also polyoxyalkylene ether derivatives thereof · CPC title

• C10N2030/04

  Detergent property or dispersant property · CPC title

• C10N2060/02

  Reduction, e.g. hydrogenation · CPC title

• C10M2229/04

  Siloxanes with specific structure · CPC title

• C08G81/022

  containing sequences of polymers of conjugated dienes and of polymers of alkenyl aromatic compounds · CPC title