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Bis-amino-containing MQ silicone resin, and preparation method and application thereof

A technology of MQ silicone resin and bisamino silane coupling agent, which is used in the preparation of bisamino MQ silicone resin, anti-leakage tracking agent, and the application field of addition type liquid silicone rubber, which can solve the problem of damage to the mechanical properties of silicone rubber and Processing performance, prolonging the vulcanization time of addition-type liquid silicone rubber, and low efficiency of inorganic anti-tracking agents, to achieve the effects of improving anti-tracking performance, cheap raw materials, and low nitrogen content

Active Publication Date: 2017-02-08
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In summary, it can be found that although the existing technology has made some progress in improving the tracking resistance of silicone rubber, the efficiency of inorganic tracking resistance is low, and the addition of a large amount will seriously damage the mechanical properties and processing properties of silicone rubber.
Although nitrogen-containing organic compounds can effectively improve the tracking resistance of silicone rubber, if they are used in addition-type liquid silicone rubber, there will be a risk of poisoning the platinum catalyst, prolonging the vulcanization time of addition-type liquid silicone rubber, Even make it impossible to vulcanize smoothly

Method used

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  • Bis-amino-containing MQ silicone resin, and preparation method and application thereof
  • Bis-amino-containing MQ silicone resin, and preparation method and application thereof
  • Bis-amino-containing MQ silicone resin, and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] In terms of mass percent, the synthetic raw materials containing bisamino-MQ silicone resin 1 include the following components:

[0043]

[0044]

[0045]Preparation method: Add hexamethyldisiloxane, tetramethyldivinylsiloxane, tetramethyldivinylsiloxane, Deionized water, ethanol and concentrated hydrochloric acid were stirred and reacted at a temperature of 60°C for 0.5h; tetraethyl orthosilicate was added dropwise for 3h, and the reaction was continued for 1h after the addition; then γ- (β-Aminoethyl)aminopropyltriethoxysilane, the dropwise addition time is 0.5h, after the dropwise addition is completed, the temperature is raised to 70°C to continue the stirring reaction; after 2h, toluene is added for extraction, and the toluene phase is washed with deionized water To neutrality, the solvent and low boilers were distilled off under reduced pressure to obtain bisamino-containing MQ silicone resin 1.

[0046] 100 parts by mass of vinyl silicone oil (viscosity at...

Embodiment 2

[0049] In terms of mass percent, the synthetic raw materials containing bisamino-MQ silicone resin 2 include the following components:

[0050]

[0051] Preparation method: Add hexamethyldisiloxane, tetramethyldivinylsiloxane, tetramethyldivinylsiloxane, Deionized water, isopropanol and concentrated sulfuric acid were stirred and reacted at a temperature of 70°C for 1h; orthosilicate was added dropwise for 1h, and after the addition was completed, the reaction was continued for 1h; then γ -(β-Aminoethyl)aminopropyltrimethoxysilane, the dropping time is 0.5h. After the dropping is completed, the temperature is raised to 80°C to continue the stirring reaction; after 1h, toluene is added for extraction, and the toluene phase is washed with deionized water To neutrality, the solvent and low boilers were distilled off under reduced pressure to obtain bisamino-containing MQ silicone resin 2.

[0052] Change the diamino-containing MQ silicone resin 1 in Example 2 into the diamino...

Embodiment 3

[0054] In terms of mass percentage, the synthetic raw materials containing bisamino-MQ silicone resin 3 include the following components:

[0055]

[0056] Preparation method: Add hexamethyldisiloxane, tetramethyldivinylsiloxane, tetramethyldivinylsiloxane, Deionized water, butanol and p-toluenesulfonic acid, stirred and reacted at 60°C for 2h; added dropwise methyl orthosilicate for 4h, and continued to react for 0.5h after the dropwise addition; then added dropwise γ-(β-Aminoethyl)aminopropyltriethoxysilane, the dropping time is 1h, after the dropping is completed, the temperature is raised to 80°C and the reaction is continued; after 2h, toluene is added for extraction, and the toluene is washed with deionized water phase to neutral, the solvent and low boilers were distilled off under reduced pressure to obtain bisamino-containing MQ silicone resin 3.

[0057] Change the diamino-containing MQ silicone resin 1 in Example 1 into the diamino-containing MQ silicone resin 3...

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Abstract

The invention discloses a bis-amino-containing MQ silicone resin, and a preparation method and application thereof. The bis-amino-containing MQ silicone resin is composed of the following raw materials in percentage by mass: 18-48% of tetrafunctional silicon monomer, 8-32% of siloxane blocking agent, 1-4% of bis-aminosilane coupling agent, 3-14% of acid catalyst, 4-30% of alcohol and 12-20% of deionized water. The preparation method comprises the following steps: adding the siloxane blocking agent into a mixed solution composed of the deionized water, alcohol and acid catalyst, and carrying out prehydrolysis; and sequentially and dropwisely adding the tetrafunctional silicon monomer and bis-aminosilane coupling agent, and stirring at 60-80 DEG C to react for 0.5-2 hours. A small amount of bis-amino-containing MQ silicone resin can be added to obviously enhance the tracking resistance of the addition-type liquid silicone rubber and enhance the mechanical properties of the addition-type liquid silicone rubber to some extent.

Description

technical field [0001] The invention relates to the field of polymer insulating materials, in particular to an addition-type liquid silicone rubber anti-tracking agent. The invention also relates to a preparation method of the bisamino-containing MQ silicone resin and its application in addition-type liquid silicone rubber. Background technique [0002] Silicone rubber has excellent properties such as high and low temperature resistance, weather resistance, electrical insulation, hydrophobicity and hydrophobic recovery, and is widely used as external insulation materials for high-voltage and ultra-high-voltage power transmission and transformation equipment. Among various silicone rubbers, addition-type liquid silicone rubber has the advantages of no by-products in the vulcanization process, minimal shrinkage, deep vulcanization, etc., and is simple in process and low in cost, and has become the preferred raw material for insulating materials in the power industry. However,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G77/26C08G77/20C08L83/08C08L83/05C08L83/07C08K3/36C08K5/5445
CPCC08G77/20C08G77/26C08K2201/006C08L83/04C08L2203/20C08L2205/02C08L2205/025C08L2205/03C08L83/08C08K3/36C08K5/544
Inventor 曾幸荣张亚军赖学军李红强周泉
Owner SOUTH CHINA UNIV OF TECH
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