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EP0908509A1 Expired / Lapsed EP ⏱️ 0.0 years remaining

Refrigerator oil composition

Assignee: Idemitsu Kosan Co Ltd
•
Filing: 1997-06-18
•
Granted: —
•
Expires: 2017-06-18
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Abstract

Abstract Disclosed is a refrigerator oil composition having an excellent lubricating property, while specifically improving the lubricity between aluminium materials and steel materials, and is suitable as a lubricating oil in refrigerators using hydrogen-containing Flon refrigerants, such as 1,1,1,2-tetrafluoroethane, that do not cause environmental pollution. Disclosed is a refrigerator oil composition comprising at least one base oil selected from mineral oils and synthetic oils, and at least one polyoxyethylene-type nonionic surfactant. The nonionic surfactant for use preferably has a number of mols of oxyethylene of from 1 to 40 or has a HLB value of from 2 to 30. The nonionic surfactant for use may include, for example, polyoxyethylene alkyl ethers, polyoxyethylene alkenyl ethers, polyoxyethylene alkylaryl ethers, polyoxyethylene fatty acid esters, polyoxyethylene sorbitan fatty acid esters, and polyoxyethylene sorbitol fatty acid esters.

Inventors

  • 👤 Masato Kaneko

Bibliographic Details

Application Number —
Jurisdiction EP
Data Source google_patents
Last Synchronized 2026-11-09 13:36
CPC Classifications
C; C10; C10M; C10M145/00; C10M145/18; C10M145/24; C10M145/26; C10M145/36; C10M101/00; C10M101/02; C10M105/00; C10M105/08; C10M105/32; C10M105/38; C10M105/42; C10M107/00; C10M107/20; C10M107/22; C10M107/28; C10M107/30; C10M107/32; C10M107/34; C10M129/00; C10M129/02; C10M129/16; C10M129/18; C10M129/66; C10M145/38; C10M169/00; C10M169/04; C10M169/041; C10M169/044; C10M171/00; C10M171/008; C10M2203/00; C10M2203/06; C10M2203/10; C10M2203/1006; C10M2203/102; C10M2203/1025; C10M2203/104; C10M2203/1045; C10M2203/106; C10M2203/1065; C10M2203/108; C10M2203/1085; C10M2207/00; C10M2207/04; C10M2207/042; C10M2207/10; C10M2207/24; C10M2207/28; C10M2207/281; C10M2207/282; C10M2207/283; C10M2207/2835; C10M2207/286; C10M2207/30; C10M2207/301; C10M2209/00; C10M2209/02; C10M2209/04; C10M2209/06; C10M2209/062; C10M2209/08; C10M2209/084; C10M2209/0845; C10M2209/086; C10M2209/0863; C10M2209/10; C10M2209/103; C10M2209/1033; C10M2209/104; C10M2209/1045; C10M2209/105; C10M2209/1055; C10M2209/106; C10M2209/1065; C10M2209/107; C10M2209/1075; C10M2209/108; C10M2209/1085; C10M2209/109; C10M2209/1095; C10M2211/00; C10M2211/02; C10M2211/022; C10M2211/06; C10N; C10N2020/00; C10N2020/01; C10N2040/00; C10N2040/30; C10N2040/32; C10N2040/34; C10N2040/36; C10N2040/38; C10N2040/40; C10N2040/42; C10N2040/44; C10N2040/50

Claims Analysis

Total Claims: 10
Claim 1
Independent Claim 24 words
A refrigerator oil composition comprising at least one base oil selected from mineral oils and synthetic oils, and at least one polyoxyethylene-type nonionic surfactant.
Claim 2
Dependent Claim 26 words
The refrigerator oil composition as claimed in claim 1, wherein the number of mols of oxyethylene in the polyoxyethylene-type nonionic surfactant is from 1 to 40.
Claim 3
Dependent Claim 25 words
The refrigerator oil composition as claimed in claim 1 or 2, wherein the polyoxyethylene-type nonionic surfactant has an HLB value of from 2 to 30.
Claim 4
Dependent Claim 50 words
The refrigerator oil composition as claimed in claim 1 or 2, wherein the polyoxyethylene-type nonionic surfactant is at least one selected from the group consisting of polyoxyethylene alkyl ethers, polyoxyethylene alkenyl ethers, polyoxyethylene alkylaryl ethers, polyoxyethylene fatty acid esters, polyoxyethylene sorbitan fatty acid esters and polyoxyethylene sorbitol fatty acid esters.
Claim 5
Dependent Claim 48 words
The refrigerator oil composition as claimed in claim 3, wherein the polyoxyethylene-type nonionic surfactant is at least one selected from the group consisting of polyoxyethylene alkyl ethers, polyoxyethylene alkenyl ethers, polyoxyethylene alkylaryl ethers, polyoxyethylene fatty acid esters, polyoxyethylene sorbitan fatty acid esters and polyoxyethylene sorbitol fatty acid esters.
Claim 6
Dependent Claim 35 words
The refrigerator oil composition as claimed in claim 1 or 2, wherein the amount of the polyoxyethylene-type nonionic surfactant is from 0.01 to 30 % by weight relative to the total weight of the composition.
Claim 7
Dependent Claim 33 words
The refrigerator oil composition as claimed in claim 3, wherein the amount of the polyoxyethylene-type nonionic surfactant is from 0.01 to 30 % by weight relative to the total weight of the composition.
Claim 8
Dependent Claim 33 words
The refrigerator oil composition as claimed in claim 4, wherein the amount of the polyoxyethylene-type nonionic surfactant is from 0.01 to 30 % by weight relative to the total weight of the composition.
Claim 9
Dependent Claim 33 words
The refrigerator oil composition as claimed in claim 5, wherein the amount of the polyoxyethylene-type nonionic surfactant is from 0.01 to 30 % by weight relative to the total weight of the composition.
Claim 10
Dependent Claim 29 words
The refrigerator oil composition as claimed in claim 1 or 2, wherein the base oil has a kinetic viscosity at 100°C of from 1 to 100 m 2 /sec.

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