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High-performance insulation lubricating grease and preparation method thereof

A lubricating grease and high-performance technology, which is applied in the field of high-performance insulating lubricating grease and its preparation, can solve the problems of poor ink adhesion and stability, easy structuring, short shelf life, etc., and achieve oil separation, enhanced compatibility, The effect of not easy to sag

Active Publication Date: 2019-05-24
东莞市港田高分子材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the lubricating grease produced by this process has disadvantages such as easy oil separation, easy structure or return to thinning after long-term storage
[0004] In view of the above problems, the patent CN101240211A provides a preparation method of nano-silica grease, the method is mainly to add a modifying agent to silicone oil and nano-silica to modify, but the grease storage period is not more than 6 months, stencil oil separation (100℃×30h) is 0.68wt%, the shelf life is still short, ink adhesion and stability are poor

Method used

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  • High-performance insulation lubricating grease and preparation method thereof
  • High-performance insulation lubricating grease and preparation method thereof
  • High-performance insulation lubricating grease and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] Hydrophobic ultrafine silica pre-preparation: 100 parts with a specific surface area of ​​100m 2 / g, precipitated silica with a particle size of 30nm was put into the reactor, started to stir, then added 10 parts of hexamethyldisilazane and 2 parts of purified water by spraying, and discharged after airtight treatment at room temperature for 4 hours. Seal it with a PE bag and store it at room temperature for 30 days.

[0043] Preparation of high-performance insulating grease: put 60 parts of simethicone oil with a viscosity of 500CS into the kneader, and then put in 36 parts of hydrophobic superfine silica in batches, stir to form a mass, and continue to stir at a material temperature of 90°C 2h, stirring speed 50r / min, vacuum stirring at material temperature 190°C for 2h, vacuum degree: 680mmHg stirring speed 35r / min, lowering material temperature to 130°C, adding 4 parts of hydroxyl-terminated silicone oil with a viscosity of 25CS, and continuing to decompress Stir f...

Embodiment 2

[0045] Hydrophobic ultrafine silica pre-preparation: 100 parts with a specific surface area of ​​400m 2 / g, fumed silica with a particle size of 3nm was put into the reaction kettle, started stirring, then added 45 parts of hexamethyldisilazane and 15 parts of purified water by spraying, stirred at 95°C for 4h, and depressurized at 180°C Stir for 4 hours, then lower the temperature of the material to below 120°C, discharge the material after the vacuum is eliminated with nitrogen, and obtain a hydrophobic ultrafine silica with a methanol value of 48.

[0046] Preparation of high-performance insulating grease: put 74 parts of simethicone oil with a viscosity of 15000CS into the kneader, and then put in 24 parts of hydrophobic superfine silica in batches, stir to form a mass, and continue to stir at a material temperature of 80°C 4h, stirring speed 35r / min, vacuum stirring at material temperature 180°C for 4h, vacuum degree: 570mmHg, stirring speed 50r / min, lowering material tem...

Embodiment 3

[0048] Hydrophobic ultrafine silica pre-preparation: 100 parts with a specific surface area of ​​300m 2 / g, fumed silica with a particle size of 10nm was put into the reactor, started to stir, then added 25 parts of hexamethyldisilazane and 7 parts of purified water by spraying, stirred at 70°C for 2h, and depressurized at 170°C Stir for 2 hours, then lower the temperature of the material to below 120° C., discharge the material after the vacuum is eliminated with nitrogen, and obtain hydrophobic ultrafine silica with a methanol value of 45.

[0049] Preparation of high-performance insulating grease: Put 68 parts of simethicone oil with a viscosity of 2000CS into the kneader, and then put in 30 parts of hydrophobic superfine silica in batches, stir to form a mass, and continue to stir at a material temperature of 60°C 3h, stirring speed 20r / min, vacuum stirring at material temperature 160°C for 3h, vacuum degree: 720mmHg, stirring speed 20r / min, lowering material temperature to...

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Abstract

The invention discloses a high-performance insulation lubricating grease and a preparation method thereof. The high-performance insulation lubricating grease comprises, by weight, 60-74 parts of silicone oil, 24-36 parts of hydrophobic ultra-fine silica, 0.5-1 part of a constitution controller and 1-3 parts of a thixotropic agent. The preparation comprises the steps that the silicone oil and the hydrophobic ultra-fine silica are mixed and processed at a low temperature in a kneader, high-temperature vacuum processing is conducted, the constitution controller and the thixotropic agent are addedafter the temperature is decreased, and the high-performance insulation lubricating oil is obtained after the mixture is ground by a three-roller grinding machine. The prepared high-performance insulation lubricating grease has the advantages that the storage period is 18 months or above, the lubricating grease does not thin, bleed and structuralize, and the colloidal stability and shearing stability are excellent.

Description

technical field [0001] The invention relates to the technical field of organic silicon, in particular to a high-performance insulating grease and a preparation method thereof. Background technique [0002] Insulating grease has excellent insulation, high and low temperature resistance and water resistance due to the addition of silicon dioxide, so it has important applications in plastic parts, switches, electrical insulation, etc. [0003] The current process of preparing insulating grease is to simply mix silicone oil and silicon dioxide mechanically, and then grind it through a three-roll mill. However, the lubricating grease produced by this process has disadvantages such as easy oil separation, easy structure or return to thinning after long-term storage. [0004] In view of the above problems, the patent CN101240211A provides a preparation method of nano-silica grease, the method is mainly to add a modifying agent to silicone oil and nano-silica for modification, but ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10M169/04C10M177/00C10N50/10C10N30/06
Inventor 邓元福黄原志
Owner 东莞市港田高分子材料有限公司
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