Ethylene/α-olefin copolymers and lubricating oils
US-10329366-B2 · Jun 25, 2019 · US
Lubricating oil compositions and lubricating oil viscosity modifiers
US11655428B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-11655428-B2 |
| Application number | US-201917044846-A |
| Country | US |
| Kind code | B2 |
| Filing date | Apr 16, 2019 |
| Priority date | Apr 17, 2018 |
| Publication date | May 23, 2023 |
| Grant date | May 23, 2023 |
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Abstract
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A lubricating oil composition includes an ethylene/α-olefin copolymer (A) having 70 to 90 mole % of structural units derived from ethylene and an intrinsic viscosity [η] of 0.3 to 1.0 dl/g.
First claim
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The invention claimed is: 1. A lubricating oil composition comprising an ethylene/α-olefin copolymer (A) having more than 70 mole % and not more than 90 mole % of structural units derived from ethylene and an intrinsic viscosity [η] of 0.3 to 1.0 dl/g, wherein the copolymer (A) is an ungrafted copolymer of ethylene and 4-methyl-pentene-1 having no less than 10 mole % and no more than 28 mole % of structural units derived from 4-methyl-pentene-1. 2. The lubricating oil composition according to claim 1 , wherein the copolymer (A) is a copolymer showing a melting point of not more than 100° C. or no melting point as measured with a differential scanning calorimeter (DSC). 3. The lubricating oil composition according to claim 1 , further comprising a lubricant base oil (B). 4. The lubricating oil composition according to claim 1 , which is an engine oil. 5. A lubricating oil viscosity modifier comprising an ungrafted copolymer of ethylene and 4-methyl-pentene-1, the copolymer having more than 70 mole % and not more than 90 mole % of structural units derived from ethylene and having no less than 10 mole % and no more than 28 mole % of structural units derived from 4-methyl-pentene-1, and an intrinsic viscosity [η] of 0.3 to 1.0 dl/g. 6. The lubricating oil composition according to claim 1 , which has a kinematic viscosity at 100° C. of 7.4 to 14.7 mm 2 /s and is an engine lubricating oil composition. 7. The lubricating oil composition according to claim 1 , wherein the copolymer (A) is a copolymer showing a melting point of not more than 100° C. or no melting point as measured with a differential scanning calorimeter (DSC), and the composition is an engine lubricating oil composition. 8. The lubricating oil composition according to claim 1 , wherein the copolymer (A) has 79 to 90 mole % of structural units derived from ethylene, and the composition is an engine lubricating oil composition. 9. The lubricating oil composition according to claim 1 , which further comprises a lubricant base oil (B) and is an engine lubricating oil composition. 10. The lubricating oil composition according to claim 1 , wherein the ethylene/α-olefin copolymer (A) having not less than 70.5 mole % and not more than 90 mole % of structural units derived from ethylene. 11. The lubricating oil composition according to claim 1 , wherein the ethylene/α-olefin copolymer (A) having not less than 86.3 mole % and not more than 90 mole % of structural units derived from ethylene. 12. The lubricating oil composition according to claim 1 , wherein the ethylene/α-olefin copolymer (A) having more than 86.3 mole % and not more than 87.1 mole % of structural units derived from ethylene.
Assignees
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Classifications
used as base material · CPC title
Diesel engines · CPC title
Metal containing thio derivatives · CPC title
Ethene · CPC title
with aliphatic 1-olefins containing one carbon-to-carbon double bond · CPC title
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- What does patent US11655428B2 cover?
- A lubricating oil composition includes an ethylene/α-olefin copolymer (A) having 70 to 90 mole % of structural units derived from ethylene and an intrinsic viscosity [η] of 0.3 to 1.0 dl/g.
- Who is the assignee on this patent?
- Mitsui Chemicals Inc
- What technology area does this patent fall under?
- Primary CPC classification C10M143/08. Mapped technology areas include Chemistry & Metallurgy.
- When was this patent published?
- Publication date Tue May 23 2023 00:00:00 GMT+0000 (Coordinated Universal Time) (B2). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 6 related publications on this page (citations in our corpus or others sharing the same primary CPC).