Viscosity modifier for lubricating oils, additive composition for lubricating oils, and lubricating oil composition
US-2017175028-A1 · Jun 22, 2017 · US
Dewaxing aid
US12378336B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-12378336-B2 |
| Application number | US-202117789744-A |
| Country | US |
| Kind code | B2 |
| Filing date | Jan 12, 2021 |
| Priority date | Jan 17, 2020 |
| Publication date | Aug 5, 2025 |
| Grant date | Aug 5, 2025 |
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- Title
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Abstract
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The dewaxing aid of the present invention is a dewaxing aid including an ethylene-α-olefin copolymer (A) having a molar ratio [(a)/(b)] of (a) ethylene and (b) an α-olefin having 3 or more and 12 or less carbon atoms of 93/7 to 75/25, and having a weight average molecular weight of 10,000 to 500,000. According to the present invention, a dewaxing aid that is excellent in improving filterability can be provided.
First claim
Opening claim text (preview).
The invention claimed is: 1. A dewaxing aid, comprising: an ethylene-α-olefin copolymer (A) having a molar ratio [(a)/(b)] of (a) ethylene and (b) an α-olefin having 3 or more and 12 or less carbon atoms of 93/7 to 75/25 and having a weight average molecular weight of 10,000 to 500,000; and an ethylene-ethyl acrylate copolymer (B) having a molar ratio [(c)/(d)] of (c) ethylene and (d) ethyl acrylate of 98/2 to 80/20, and having a weight average molecular weight of 50,000 to 1,000,000 at a ratio of (A)/(B)=95/5 to 70/30 (mass ratio). 2. The dewaxing aid of claim 1 , wherein the α-olefin (b) has 4 or more and 8 or less carbon atoms. 3. The dewaxing aid of claim 1 , wherein the ethylene-α-olefin copolymer (A) has a weight average molecular weight of 50,000 to 150,000. 4. The dewaxing aid of claim 1 , wherein the ethylene-α-olefin copolymer (A) has molar ratio [(a)/(b)] of 90/10 to 85/15. 5. The dewaxing aid of claim 1 , wherein the ethylene-ethyl acrylate copolymer (B) has a weight average molecular weight of 75,000 to 500,000 at a ratio of (A)/(B) =95/5 to 70/30 (mass ratio). 6. The dewaxing aid of claim 1 , wherein the ethylene-ethyl acrylate copolymer (B) has a molar ratio [(c)/(d)] of 92/8 to 86/14. 7. The dewaxing aid of claim 1 , having a mass ratio (A)/(B) of the ethylene-α-olefin copolymer (A) to the ethylene-ethyl acrylate copolymer (B) of 90/10 to 75/25.
Assignees
Inventors
Classifications
Homopolymers or copolymers of acrylic acid esters · CPC title
Copolymers of ethene with alpha-alkenes, e.g. EP rubbers · CPC title
with aliphatic 1-olefins containing one carbon-to-carbon double bond · CPC title
with acrylic or methacrylic acids · CPC title
Lubricating oil · CPC title
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- What does patent US12378336B2 cover?
- The dewaxing aid of the present invention is a dewaxing aid including an ethylene-α-olefin copolymer (A) having a molar ratio [(a)/(b)] of (a) ethylene and (b) an α-olefin having 3 or more and 12 or less carbon atoms of 93/7 to 75/25, and having a weight average molecular weight of 10,000 to 500,000. According to the present invention, a dewaxing aid that is excellent in improving filterability…
- Who is the assignee on this patent?
- Nof Corp
- What technology area does this patent fall under?
- Primary CPC classification C10G73/04. Mapped technology areas include Chemistry & Metallurgy.
- When was this patent published?
- Publication date Tue Aug 05 2025 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 2 related publications on this page (citations in our corpus or others sharing the same primary CPC).