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Water-proof sealing grease for optical instrument and preparation method thereof

A technology of waterproof sealing and optical instruments, applied in the field of optical accessories, can solve the problems that the instrument cannot work normally, internal components are damaged, and the waterproof performance of ordinary grease cannot meet the requirements, etc.

Active Publication Date: 2013-04-17
云南光电辅料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Many optical instruments are usually used in a water environment, or installed in a relatively complex environment such as outdoors, and special waterproof treatment is required at the connection or rotating position, otherwise water will enter the interior during use and the instrument will not work properly , its internal components are also easily damaged by water, and the waterproof performance of ordinary grease cannot meet the requirements

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Recipe (parts ratio):

[0022] Benzyl silicone oil with a kinematic viscosity of 200cst at 25°C 20

[0023] Simethicone oil with kinematic viscosity of 200000cst at 25℃ 50

[0024] Bis(2-ethylhexyl) sebacate 10

[0025] Acetyl triethyl citrate 3

[0026] Hydrophobic fumed silica 17 .

[0027] During preparation, phenylmethyl silicone oil with a kinematic viscosity cst (25°C) of 200cst at 25°C, simethicone oil with a kinematic viscosity cst (25°C) of 200000cst at 25°C, bis(2-ethyl sebacate) Add hexyl) fat and acetyl triethyl citrate into the mixing bucket, stir at a speed of 100r / min for 2 hours and mix evenly, then add hydrophobic fumed silica and stir at a low speed, disperse and mix evenly, and spread out after turning over the plate. Put it into a vacuum drying oven at a temperature of 80°C, a vacuum of 500mmHg, and heat and vacuum for 3 hours; after heating and vacuuming, take out the waterproof sealing grease and cool it to room temperature, grind it 3 times, a...

Embodiment 2

[0029] Recipe (parts ratio):

[0030] Simethicone oil with a kinematic viscosity of 3000cst at 25°C 25

[0031] Dimethicone oil with a kinematic viscosity of 50000cst at 25°C 45

[0032] Ethyl silicone oil 15

[0033] Tributyl citrate 1

[0034] Hydrophobic fumed silica 14 .

[0035] During preparation, mix simethicone oil with a kinematic viscosity of 3000cst at 25°C, simethicone oil with a kinematic viscosity of 50000cst at 25°C, bis(2-ethylhexyl) sebacate, and acetyl triethyl citrate Add it into a mixing bucket, stir at a speed of 300r / min for 1 hour and mix evenly, then add hydrophobic fumed silica and stir at a low speed to disperse and mix evenly. The vacuum degree is 600mmHg, and the heating and vacuuming time is 5 hours;

[0036] After heating and vacuuming, take out the waterproof sealing grease and cool it to room temperature, grind it 4 times, and put it into a box after passing the inspection.

Embodiment 3

[0038] Recipe (parts ratio):

[0039] Hydrogen-containing silicone oil with a kinematic viscosity of 50cst at 25°C 30

[0040] Dimethicone oil with a kinematic viscosity of 300,000cst at 25°C 55

[0041] Azelaic acid 5

[0042] Dibutyl phthalate 3

[0043] Hydrophobic fumed silica 7.

[0044] During the preparation, add hydrogen-containing silicone oil with a kinematic viscosity of 50cst at 25°C, dimethyl silicone oil with a kinematic viscosity of 300,000cst at 25°C, azelaic acid grease, and dibutyl phthalate into the mixing tank according to the proportioning ratio. Stir at a speed of min for 3 hours to mix evenly, then add hydrophobic fumed silica and stir at a low speed to disperse and mix evenly, turn it over and flatten it, put it in a vacuum drying oven at a temperature of 100°C and a vacuum of 700mmHg, heat and pump The vacuum time is 8 hours; after heating and vacuuming, take out the waterproof sealing grease and cool it to room temperature, grind it 5 times, and p...

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Abstract

The invention relates to the field of optical auxiliary materials, in particular to a water-proof sealing grease for an optical instrument and a preparation method thereof. The grease, actually a mixture, is characterized by comprising the raw materials in part by weight ratio: two kinds of silicone oils with kinematic viscosities of 0.65-3000 cst and 3000-500000 cst at 25 DEG C, a lipid solubility additive, a plasticizer, and an inorganic gelling agent. The method comprises the following steps: adding the two kinds of silicone oils with kinematic viscosities of 0.65-3000 cst and 3000-500000 cst at 25 DEG C, the lipid solubility additive and the plasticizer in a mixing tank for mixing for 0.5-3 h at the speed of 30-1000 r / min, adding the inorganic gelling agent after the mixture is uniformly mixed for further uniformly mixing, pouring into a plate for spreading, placing in a vacuum drying box for heating 3-8 h, taking out for cooling to an ambient temperature, grinding 3-5 times, and packing if passing the detection. The grease is used for the sealing and lubricating of the optical instruments, has good water resistance, does not dissolve in the water environment, dose not disperse, is strong in air tightness, small in volatility and good in lubricity, has the advantages of no corrosion to metal and glass and has high and low temperature resistance.

Description

technical field [0001] The invention relates to the field of optical auxiliary materials, in particular to a waterproof sealing grease for optical instruments and a preparation method thereof. Background technique [0002] Waterproof sealing grease for optical instruments is used in the lubrication and sealing of moving parts and various sliding parts of optical instruments in a water environment, and has the performance of waterproof, lubricating and sealing. The sealing and lubrication requirements for optical instruments are as follows: sealing materials for optical instruments are used for joints and screw connections of parts in optical instruments, so as to prevent dust, moisture, water, keep the optical system clean, prevent mildew, and prevent fog. , Anti-corrosion. The requirements for sealing materials are: 1. Strong ability to adhere to metal and glass, but not to human body; 2. Strong air tightness; 3. Low volatility, no corrosion to metal and glass; 4. Anti-agi...

Claims

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Application Information

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IPC IPC(8): C10M169/00C10N40/34
Inventor 李妹明杨小祥钱鹏
Owner 云南光电辅料有限公司
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