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A dust-proof grease composition for optical instruments and its preparation method

A technology for optical instruments and compositions, applied in the field of dust-proof grease compositions for optical instruments and their preparation, can solve the problems of obstructing observation and the like

Active Publication Date: 2020-10-30
武汉博达特种润滑技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] (3) The grease itself does not grow mold. If mold grows, the hyphae can extend to the mirror surface, hindering observation

Method used

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  • A dust-proof grease composition for optical instruments and its preparation method
  • A dust-proof grease composition for optical instruments and its preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] A kind of dustproof grease composition for optical instruments, its preparation method is:

[0036] Take 86.3 parts of dimethicone oil with a kinematic viscosity of 12500cst at 25°C and add it to the reaction kettle, heat it up to 90°C, add 2 parts of diphenyldihydroxysilane, heat it up to 150-155°C, and then add 6 parts of the specific surface area while stirring. 250m 2 / g of hydrophilic fumed silica, after the addition, the temperature was raised to 160° C., and puffed for 1.5 hours, and the puffing process was stirred for 3 minutes every 10 minutes. Then add 5 parts of polytetrafluoroethylene micropowder, 0.1 part of benzotriazole, 0.5 part of N-phenyl alpha naphthylamine, 0.1 part of basic barium dinonylnaphthalene sulfonate, and vacuumize to -0.05 after adding MPa, dehydration at constant temperature and vacuum for 1 hour. The material is discharged into a barrel and cooled to room temperature naturally, and the finished product is obtained by grinding it on a t...

Embodiment 2

[0038] A kind of dustproof grease composition for optical instruments, its preparation method is:

[0039] Take 16 parts of dimethicone oil with a kinematic viscosity of 12500cst at 25°C and 70.3 parts of dimethyl silicone oil with a kinematic viscosity of 1000cst at 25°C into the reaction kettle, heat up to 90°C, add 1 part of diphenyldihydroxysilane, and heat up to 150~ 155°C, then add 3 parts while stirring with a specific surface area of ​​250m 2 / g of hydrophilic fumed silica, add 3 parts after the addition, the specific surface area is 260m 2 / g of hydrophobic fumed silica, then the temperature was raised to 160° C. and expanded for 1.5 hours. During the expansion, stirring was performed for 3 minutes every 10 minutes. Then add 4 parts of polytetrafluoroethylene (PTFE) micropowder, 2 parts of molybdenum dialkyldithiocarbamate (MoDTC), 0.1 part of tolutriazole, and 0.5 part of diisooctyl diphenylamine, 0.1 part of After adding neutral barium dinonylnaphthalene sulfonate...

Embodiment 3

[0041] A kind of dustproof grease composition for optical instruments, its preparation method is:

[0042] Take 20 parts of dimethicone oil with a kinematic viscosity of 12500cst at 25°C and 66.8 parts of dimethyl silicone oil with a kinematic viscosity of 1000cst at 25°C into the reaction kettle, heat it up to 90°C, add 0.5 part of diphenyldihydroxysilane, and heat it up to 150~ 155 ℃, then add 2 parts while stirring, the specific surface area is 380m 2 / g of hydrophilic fumed silica, add 4 parts after the addition, the specific surface area is 260m 2 / g of hydrophobic fumed silica, then the temperature was raised to 160° C. and expanded for 1.5 hours. During the expansion, stirring was performed for 3 minutes every 10 minutes. Then add 3 parts polytetrafluoroethylene (PTFE) micropowder, 3 parts molybdenum dialkyldithiocarbamate (MoDTC), 0.1 part benzotriazole, and 0.5 part diisooctyl diphenylamine, 0.1 part neutral Barium dinonylnaphthalene sulfonate, vacuumize to -0.05MPa...

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Abstract

The invention provides a dustproof grease composition used for an optical instrument and a preparation method of the composition. The dustproof grease composition comprises the following components inparts by weight: 67-95.2 parts of base oil, 3-15 parts of a thickening agent, 0.5-5 parts of a structure improving agent, 1-8 parts of a solid lubricant, 0.1-2 parts of a metal deactivator, 0.1-2 parts of an antioxidant, and 0.1-1 part of an antirust agent. The invention also provides a preparation method of the dustproof grease composition used for the optical instrument. The method provided bythe invention adopts fumed silica to thicken dimethyl silicone oil, and the structure improving agent, the solid lubricant, the metal deactivator, the antioxidant and the antirust agent are used to prepare the dustproof grease composition used for the optical instrument; and the prepared composition has excellent high and low temperature performance, colloidal stability, thermal oxidation stability, anti-wear and extreme pressure performance, sealing performance, adhesion performance and protection performance, and is suitable for long-term dust prevention and lubrication of rotating parts such as screw threads of various military and civilian optical instruments (sighting telescopes, periscopes and the like).

Description

technical field [0001] The invention relates to the technical field of dustproof grease for optical instruments, in particular to a dustproof grease composition for optical instruments and a preparation method thereof. Background technique [0002] Optical instruments are a kind of special precision instruments used for observation, measurement and photography. They are mainly composed of optical glass lenses, rotating and sliding adjustment mechanisms. [0003] The lubricating grease used in optical instruments is generally added at the time of assembly, with a small amount required and a long service life. It is used to ensure the normal lubrication of optical instruments during debugging and use, and will not be supplemented or replaced until the instrument system is overhauled. Because optical instruments are used in a wide range of applications, their greases must not only adapt to various special environmental conditions, but also require high reliability and extremely...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10M169/00C09K3/22C10N30/06C10N40/06C10N50/10C10N30/08
CPCC09K3/22C10M169/00C10M2201/041C10M2213/062C10M2215/064C10M2215/065C10M2215/223C10M2219/046C10M2219/068C10M2227/04C10M2229/0415C10N2030/06C10N2030/08C10N2040/06C10N2050/10C10N2030/30C10N2010/12C10N2020/02C10N2010/04
Inventor 付尚发
Owner 武汉博达特种润滑技术有限公司
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