Lubricating composition for box

By using lubricating compositions such as ethylene α-olefin copolymer and neutral phosphate derivatives in the watch bar, the problems of loosening and wear of the clock in the prior art are solved, and the stability of the clock is achieved for a long time. Working and lubrication effects.

CN114231337BActive Publication Date: 2024-12-24CITIZEN WATCH CO LTD
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Patent Information

Application Number
CN202111046996.6
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Priority Date
2020-09-09
Filing Date
2021-09-07
Publication Date
2024-12-24
Estimated Expiration
2041-09-07

AI Technical Summary

Technical Problem

The lubricating oil used in the existing watch bars causes the spring to loosen easily, fail to work stably for a long time, and the use of a grease composition cannot suppress sliding and wear.

Method used

The ethylene α-olefin copolymer containing 40°C kinematic viscosity is 20000cSt to 50000cSt as the base component, and combined with neutral phosphate derivatives, antioxidants and metal deactivators, a lubricating composition with appropriate viscosity is formed to appropriately inhibit sliding and Form a firm lubricating film.

Benefits of technology

The stable and long-term working of the watch bar is achieved, reducing the risk of spring loosening and wear, while improving the wear resistance and extreme pressure of the lubricating composition.

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Abstract

The present invention provides a lubricating composition for a movement barrel that can make a movement barrel of a watch work stably for a long time. The lubricating composition for a movement barrel contains 0.05 to 1 parts by mass of at least one selected from a specific neutral phosphate derivative and a specific neutral phosphite derivative as an extreme pressure agent, a specific diphenylamine derivative and a specific hindered amine compound as an antioxidant, and a specific benzotriazole derivative as a metal deactivator in an amount of 0.03 to 0.1 parts by mass, relative to 100 parts by mass of a base component containing an ethylene-α-olefin copolymer having a kinematic viscosity of 20,000 to 50,000 cSt at 40°C.
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