Viscosity index improver, refrigerator oil, and working fluid composition for refrigerators
US-2024309137-A1 · Sep 19, 2024 · US
Composition for refrigeration machine and composition kit for refrigeration machine
US12460147B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-12460147-B2 |
| Application number | US-202218561350-A |
| Country | US |
| Kind code | B2 |
| Filing date | May 11, 2022 |
| Priority date | May 17, 2021 |
| Publication date | Nov 4, 2025 |
| Grant date | Nov 4, 2025 |
How to read this patent
A practical reading order for non-experts. Skip the full description unless you need deep technical detail.
- Title
What the patent document calls the invention.
- Abstract
A short plain-language summary of the technical disclosure.
- Assignees and inventors
Who owns or filed the patent and who is credited as inventor.
- Key dates
Filing, priority, publication, and grant dates set the timeline.
- First independent claim
The legal scope of protection — read this for what is actually claimed.
- CPC / IPC classifications
Technology tags used to group this patent with similar filings.
- Citations and related patents
Prior art links and similar publications in this corpus.
Abstract
Official abstract text for this publication.
Provided is a composition for a refrigeration machine capable of reducing a friction coefficient in friction between sliding members in a refrigeration machine, and a composition kit for a refrigeration machine for providing the composition for a refrigeration machine. A composition for a refrigeration machine of the present disclosure includes a refrigeration machine oil, nanodiamond particles dispersed in the refrigeration machine oil, and a dispersant. The refrigeration machine oil preferably contains a polyvinyl ether, a polyol ester, a polyalkylene glycol, an alkylbenzene, or a mineral oil. The composition kit for a refrigeration machine of the present disclosure includes a refrigeration machine oil (A) containing a base oil and nanodiamond particles dispersed in the base oil, and a refrigerant (B).
First claim
Opening claim text (preview).
The invention claimed is: 1 . A composition for a refrigeration machine, the composition comprising: a refrigeration machine oil; nanodiamond particles dispersed in the refrigeration machine oil; and a dispersant and a refrigerant, wherein a proportion of the nanodiamond particles contained in the composition for a refrigeration machine is from 1 to 500 mass ppm with respect to a total amount of the refrigeration machine oil. 2 . The composition for a refrigeration machine according to claim 1 , wherein the refrigeration machine oil contains a polyvinyl ether, a polyol ester, a polyalkylene glycol, an alkylated aromatic hydrocarbon compound, or a mineral oil. 3 . The composition for a refrigeration machine according to claim 1 , wherein the dispersant includes a dispersant (I) having a mass-average molecular weight of 500 or more and an amine value of 15 mg KOH/g or more and/or a fatty acid ester-based dispersant (II). 4 . The composition for a refrigeration machine according to claim 1 , wherein the refrigeration machine oil has an SP value of from 6.0 to 12.0 (cal/cm 3 ) 1/2 . 5 . The composition for a refrigeration machine according to claim 1 , wherein the composition has a friction coefficient of 0.08 or less when the composition is used as a lubricant in a ring-on-disk friction test under conditions of a surface pressure of 2 MPa and a speed of 1.5 m/s. 6 . The composition for a refrigeration machine according to claim 1 , wherein the composition is for use in a compressor of a refrigeration machine. 7 . The composition for a refrigeration machine according to claim 1 , wherein the refrigeration machine is an air conditioner. 8 . A composition kit for a refrigeration machine, the composition kit comprising: a refrigeration machine oil (A) containing a base oil and nanodiamond particles dispersed in the base oil; and a refrigerant (B), wherein a proportion of the nanodiamond particles contained in the refrigeration machine oil for a refrigeration machine is from 1 to 500 mass ppm with respect to a total amount of the refrigeration machine oil. 9 . The composition kit for a refrigeration machine according to claim 8 , wherein the refrigeration machine oil (A) has a friction coefficient of 0.08 or less when the refrigeration machine oil (A) is used as a lubricant in a ring-on-disk friction test under conditions of a surface pressure of 2 MPa and a speed of 1.5 m/s.
Assignees
Inventors
Classifications
Refrigerators lubricants {or compressors lubricants} · CPC title
Oiliness; Film-strength; Anti-wear; Resistance to extreme pressure · CPC title
Particles of special shape or size · CPC title
Molecular weight; Molecular weight distribution · CPC title
Carbon; Graphite; Carbon black · CPC title
Patent family
Related publications grouped by family.
External sources
Frequently asked questions
Answers are generated from the same data shown on this page.
- What does patent US12460147B2 cover?
- Provided is a composition for a refrigeration machine capable of reducing a friction coefficient in friction between sliding members in a refrigeration machine, and a composition kit for a refrigeration machine for providing the composition for a refrigeration machine. A composition for a refrigeration machine of the present disclosure includes a refrigeration machine oil, nanodiamond particles…
- Who is the assignee on this patent?
- Daicel Corp, Daikin Ind Ltd
- What technology area does this patent fall under?
- Primary CPC classification C10M125/02. Mapped technology areas include Chemistry & Metallurgy.
- When was this patent published?
- Publication date Tue Nov 04 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 5 related publications on this page (citations in our corpus or others sharing the same primary CPC).