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Dealcoholization type organic silicon pouring sealant for dry type transformer and preparation method of dealcoholization type organic silicon pouring sealant

A silicone potting compound, dry-type transformer technology, applied in the field of potting compound, can solve the problems of inconvenient production and processing, slow bonding speed, short operation time, etc., achieve excellent waterproof, improve production efficiency, speed up response and The effect of bonding speed

Inactive Publication Date: 2018-10-02
GUANGDONG JIEGUO NEW MATERIAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The defects of the existing silicone potting adhesives are: 1. When the ambient temperature is lower than 15°C, the curing speed is slow, the bonding speed is slow or even no bonding; 2. The operation time is short, which brings inconvenience to production and processing; 3. Poor adhesion to internal components of dry-type transformers, easy to seep water, and low moisture-proof performance

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] Prepare A component

[0043] Preparation of heavy calcium semi-finished rubber compound: in parts by mass (the same below), put 100 parts of 2000mPa·s hydroxyl-terminated polysiloxane and 100 parts of 800 mesh heavy calcium carbonate into a planetary mixer, heat up while stirring, and the temperature reaches Start vacuuming at 120°C-150°C, maintain the temperature for 2 hours and then stop vacuuming, and obtain heavy calcium semi-finished rubber compound after cooling.

[0044]Preparation of precipitated white carbon black semi-finished rubber compound: Put 100 parts of dimethyl silicone oil with a viscosity of 350mPa·s, 40 parts of hexamethyldisilazane and 1 part of deionized water into the kneader and stir evenly, and put it in while stirring 150 parts of precipitated white carbon black, after adding the material, raise the temperature to 80°C and maintain it for 2 hours, then raise the temperature to 180°C and maintain this temperature for 2 hours, then add 100 parts...

Embodiment 2

[0053] Prepare A component

[0054] Preparation of microsilica powder semi-finished rubber material: in parts by mass (the same below), mix 100 parts of 1500mPa·s hydroxyl-terminated polysiloxane and 150 parts of 400 mesh silicon micropowder while stirring, and heat up until the temperature reaches 120°C-150°C and start pumping Vacuum, keep the temperature and vacuumize for 2 hours, then stop vacuuming, cool down to obtain the semi-finished rubber compound of silicon micropowder.

[0055] Preparation of meteorological white carbon black semi-finished rubber compound: Put 80 parts of dimethyl silicone oil with a viscosity of 1000mPa·s, 10 parts of hexamethyldisilazane and 0.5 parts of deionized water into the kneader and stir evenly, and put it in while stirring 50 parts of meteorological white carbon black, after adding the material, raise the temperature to 80°C and maintain it for 2 hours, then raise the temperature to 180°C and maintain the temperature for 2 hours to vacuum...

Embodiment 3

[0064] Prepare A component

[0065] Preparation of aluminum oxide semi-finished rubber compound: in parts by mass (the same below), mix 100 parts of 5000mPa·s hydroxyl-terminated polysiloxane and 200 parts of 500 mesh alumina powder while stirring, and heat up until the temperature reaches 120°C-150°C. Vacuumize, keep the temperature and vacuumize for 2 hours, then stop the vacuumization, and obtain the alumina semi-finished rubber compound after cooling.

[0066] Preparation of precipitated white carbon black semi-finished rubber compound: put 100 parts of simethicone oil with a viscosity of 250mPa s, 25 parts of hexamethyldisilazane and 2 parts of deionized water into the kneader and stir evenly, and put in while stirring 150 parts of precipitated white carbon black, after adding the material, raise the temperature to 80°C and maintain it for 2 hours, then raise the temperature to 180°C and maintain this temperature for 2 hours, then add 100 parts of hydroxyl-terminated poly...

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Abstract

The invention provides a dealcoholization type organic silicon pouring sealant for a dry type transformer and a preparation method of the dealcoholization type organic silicon pouring sealant. The organic silicon pouring sealant comprises a component A, a component B and a component C; the mass ratio of the component A to the component B to the component C is (100 to 3 to 3) to (100 to 10 to 10);the component A comprises the following raw materials in parts by mass: 100 parts of hydroxyl-terminated polysiloxane, 50-300 parts of packing, 0-80 parts of a plasticizer, 1-8 parts of color paste, 0.2-5 parts of a surfactant and 0.1-1 part of a curing catalyst; the component B comprises the following raw materials in parts by mass: 100 parts of a plasticizer, 5-100 parts of a cross-linking agent, 0.01-3 parts of a catalyst and 0-100 parts of a coupling agent; and the component C comprises the following raw materials in parts by mass: 100 parts of a plasticizer, 0-3 parts of a catalyst and 0-100 parts of another coupling agent. The dealcoholization type organic silicon pouring sealant can be cured at a low temperature, is high in bonding speed, easy to realize synchronous solidification,low in shrinking percentage and good in adhesive force, plays roles in water resistance, moisture resistance, thermal insulation, flame retardance and insulation on the dry type transformer, and the using reliability of the dealcoholization type organic silicon pouring sealant is improved.

Description

technical field [0001] The invention belongs to the technical field of potting glue, and in particular relates to a dealcoholized silicone potting glue for a dry-type transformer and a preparation method thereof. Background technique [0002] Dry-type transformers have the characteristics of safety and fire prevention, no pollution, energy saving, low loss, low noise, and are suitable for operation in high humidity and other harsh environments, so they are widely used in local lighting, high-rise buildings, airports, wharf CNC machinery and equipment and other places. [0003] The safe operation of a dry-type transformer and its service life largely depend on the safety and reliability of the transformer winding insulation. At present, cast-type dry-type transformers use epoxy resin or silicone potting glue as the main insulating material to be potted into the device, which plays the role of insulation, moisture-proof, heat dissipation, etc., and improves reliability. [00...

Claims

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Application Information

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IPC IPC(8): C09J183/06C09J11/06
CPCC08L2205/02C08L2205/025C08L2205/035C09J11/06C09J183/06C08L83/04C08K13/02C08K5/544C08K5/5435
Inventor 陈永林
Owner GUANGDONG JIEGUO NEW MATERIAL CO LTD