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Preparation method of single-component room-temperature vulcanized silicone rubber

A technology of room temperature vulcanization and silicone rubber, applied in the field of preparation of single-component room temperature vulcanization silicone rubber, can solve the problems of high production cost, high viscosity of base glue, low synthesis efficiency, etc., achieve low production cost, reduce solvent and glue The effect of material waste and long storage period

Active Publication Date: 2011-09-14
SHAANXI ELECTRIC POWER RES INST +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It can be completed after more than 3-5 processes. Due to the high viscosity of the base rubber, a large amount of rubber material adheres to the surface of the equipment after each process. Organic solvents must be used for cleaning the rubber material, resulting in low synthesis efficiency and high production costs. pollution and other issues

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] First, add 100 parts of α, ω-dihydroxypolydimethylsiloxane with a viscosity of 20000mPa·s, 20 parts of D4-treated nano-silica and 40 parts of aluminum hydroxide into the vacuum reactor and turn on the stirrer and heater , adjust the stirring speed to 500r / min, mix the reaction temperature at 100±5°C, start vacuuming, the vacuum degree is 0.075±0.005Mpa, increase the stirring speed to 2000r / min, stir for 2.5 hours; then, cool down to 60±5°C, add 160 parts of solvent oil, the temperature of the reactor is lowered from 60±5°C to 30±5°C, and stirred for 1 hour; again, add 4 parts of KH-550 coupling agent, 5 parts of methyltriethoxysilane, 0.15 parts of catalyst two Dibutyltin laurate, 25 parts of plasticizer hydrogen-containing silicone oil, continue to stir for 1 hour; finally stop the vacuum pump and heater, after cooling to room temperature, open the discharge valve to pack the finished product into a container, and seal the container After storage.

Embodiment 2

[0029] First, 100 parts of α, ω-dihydroxypolydimethylsiloxane with a viscosity of 50000mPa·s, 30 parts of D4-treated nano-silica, 30 parts of decabromodiphenyl ether and 10 parts of antimony trioxide were added to the vacuum Turn on the stirrer and heater in the reaction kettle, adjust the stirring speed to 500r / min, mix at a reaction temperature of 100±5°C, start vacuuming, the vacuum degree is 0.075±0.005Mpa, increase the stirring speed to 2000r / min, and stir for 4 hours; Then, lower the temperature to 60±5°C, add 180 parts of solvent oil, drop the temperature of the reactor from 60±5°C to 30±5°C, and stir for 2 hours; again, add 4 parts of KH-550 and KH- 560 mixture, 6 parts of vinyl tributyl ketoxime silicon, 0.2 parts of catalyst dibutyltin dilaurate, 30 parts of plasticizer hydrogen-containing silicone oil, continue to stir for 1 hour; finally, stop the vacuum pump and heater, cool to room temperature Finally, open the discharge valve to put the finished product into the...

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PUM

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Abstract

The invention discloses a preparation method of single-component room-temperature vulcanized silicone rubber. The whole preparation process is finished in the same reaction kettle. The preparation method comprises the following steps: firstly, uniformly scattering solid particles in rubber under the stirring action to increase temperature and lower the viscosity of the basic rubber and reduce thestirring power; decreasing the temperature after uniform scattering to prevent a diluting agent, coupling agent, and the like from volatilizing; and adding a diluting agent and then a curing agent, i.e. a coupling agent, a catalyst, and the like to avoid local overheating to cause a condensation phenomenon. The invention lessens solvent waste and environmental pollution caused by the flowing lossand the continuous cleaning of the rubber in production links of a plurality of intermittent production equipment, prolongs the storage period of the product by effectively preventing the rubber fromcontacting moisture in the air and saves the cost.

Description

technical field [0001] The invention belongs to a method for preparing rubber, and relates to a method for preparing a single-component room temperature vulcanized silicone rubber. Background technique [0002] Room temperature vulcanized silicone rubber (RTV) is a new type of silicone elastomer, which can be cured at room temperature, has better fluidity, can be constructed on site, and has insulation, hydrophobicity, adhesion, heat resistance and other properties. Good, widely used in insulator anti-pollution flashover coatings, plastic molds and other fields. The vulcanization reaction of this rubber material is triggered by contact with moisture in the air, and it vulcanizes into an elastomer when it meets moisture at room temperature. [0003] At present, the preparation of one-component RTV silicone rubber requires at least 3 to 5 sets of equipment. It can be completed after more than 3-5 processes. Due to the high viscosity of the base rubber, a large amount of rubb...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L83/06C08L83/04C08K9/00C08K3/36C08K5/5419C08K3/22C08K5/06C08K5/03C08J3/24
Inventor 宋元峰闫爱军王森冯拉俊郭安祥王晓婧
Owner SHAANXI ELECTRIC POWER RES INST