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Uramido modified MQ silicon resin, and preparation method and application thereof

A MQ silicone resin and modification technology, applied in the modification and application field of MQ silicone resin, can solve the problems of undiscovered papers and patent publications, and achieve good compatibility of silicone oil, improved mechanical properties and hydrophobic properties, and preparation technology. easy effect

Inactive Publication Date: 2014-10-08
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, no related papers and patents have been found so far

Method used

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  • Uramido modified MQ silicon resin, and preparation method and application thereof
  • Uramido modified MQ silicon resin, and preparation method and application thereof
  • Uramido modified MQ silicon resin, and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] In terms of mass percentage, the synthetic raw materials of urea-modified MQ silicone resin 1 include the following components:

[0035]

[0036] Preparation method: In the reaction kettle, add deionized water, ethanol, concentrated hydrochloric acid, hexamethyldisiloxane and tetramethyldivinyldisiloxane of the above raw material formula, and stir the reaction at a temperature of 80°C 0.5h; Add the mixed solution of ethyl tetrasilicate and 3‐(diisopropylureido)propyltriethoxysilane dropwise, the dropping time is controlled at 4h, and the reaction temperature is controlled at 80°C; the dropping is completed After that, the stirring reaction was continued at 80°C for 0.5 h; toluene was added for extraction, the toluene phase was washed with deionized water until neutral, and the solvent and low boilers were distilled off under reduced pressure to obtain ureido-modified MQ silicone resin 1.

[0037] 100 parts by mass of vinyl silicone oil (viscosity at 25°C is 20000mPa·...

Embodiment 2

[0040] In terms of mass percentage, the synthetic raw materials of urea-modified MQ silicone resin 2 include the following components:

[0041]

[0042]

[0043] Preparation method: Add deionized water, ethanol, concentrated sulfuric acid, hexamethyldisiloxane and tetramethyldivinyldisiloxane into a reaction kettle, and stir for 0.5h at a temperature of 70°C; Add dropwise the mixed solution of methyl orthosilicate and 3-(diisopropylureido) propyltriethoxysilane, the time of dropping is controlled at 3h, and the reaction temperature is controlled at 70°C; Continue to stir and react at 70°C for 1 h; add toluene for extraction, wash the toluene phase with deionized water until neutral, and distill off the solvent and low boilers under reduced pressure to obtain ureido-modified MQ silicone resin 2.

[0044] The urea-modified MQ silicone resin 1 in Example 1 was changed to urea-modified MQ silicone resin 2, the dosage was 3.57 parts by mass, and the corresponding amount of hydr...

Embodiment 3

[0046] In terms of mass percentage, the synthetic raw materials of urea-modified MQ silicone resin 3 include the following components:

[0047]

[0048] Preparation method: add deionized water, n-butanol, concentrated hydrochloric acid, hexamethyldisiloxane and tetramethyldivinyldisiloxane into a reaction kettle, and stir for 2 hours at a temperature of 70°C; Add the mixed solution of ethyl orthosilicate, dimethyldimethoxysilane and 3-(diisopropylureido) propyl triethoxysilane dropwise, the time of dropping is controlled at 6h, and the reaction temperature is controlled at 70°C; after the dropwise addition, continue to stir and react for 2 hours at a temperature of 70°C; add toluene for extraction, wash the toluene phase with deionized water to neutrality, and distill under reduced pressure to remove solvents and low boilers to obtain urea-modified MQ Silicone 3.

[0049] The urea-modified MQ silicone resin 1 in Example 1 was changed to the urea-modified MQ silicone resin ...

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Abstract

The invention discloses a uramido modified MQ silicon resin, and a preparation method and application thereof. The silicon resin is prepared from the following raw materials in percentage by weight: 20-40% of tetra-functionality silicon monomer, 5-30% of siloxane blocking agent, 15-30% of uramido silane coupling agent, 1-10% of catalyst, 5-20% of alcohol and 10-15% of deionized water. The preparation method comprises the following steps: stirring the deionized water, alcohol, catalyst and siloxane blocking agent at 70-80 DEG C to react; dropwisely adding the tetra-functionality silicon monomer / uramido silane coupling agent mixed solution, and reacting while controlling the temperature at 70-80 DEG C; after the dropwise addition, continuing stirring to react for 0.5-2 hours; and extracting, washing, and distilling under reduced pressure to obtain the uramido modified MQ silicon resin. The uramido modified MQ silicon resin has favorable compatibility with silicon rubber and silicon oil, and can obviously enhance the tracking resistance and mechanical properties of the addition-type liquid silicon rubber.

Description

technical field [0001] The invention relates to the modification and application of MQ silicone resin, in particular to a preparation method of urea-modified MQ silicone resin and its application in addition-type liquid silicone rubber. Background technique [0002] Silicone resin has both organic groups and inorganic structures in its structure. It combines the characteristics of inorganic and organic substances. It has excellent high and low temperature resistance, weather aging resistance, electrical insulation, ozone resistance, flame retardant, non-toxic and With the advantages of no corrosion, it has been widely used in the fields of national defense, electrical and electronic, machinery, construction and transportation. [0003] MQ silicone resin is a type of silicone resin with a three-dimensional network structure, composed of monofunctional silicon-oxygen units (R 3 Si 1 / 2 , that is, the M unit) and the tetrafunctional silicon-oxygen unit (SiO 2 , that is, Q uni...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G77/26C08L83/07C08L83/08C08L83/05C08K13/02C08K3/36C08K5/5445
Inventor 曾幸荣方伟镇赖学军李红强谢炽新陈宛涓张亚军
Owner SOUTH CHINA UNIV OF TECH
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