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Method for synthesizing emulsion type MDQ silicon resin by emulsion polymerization method

An emulsion polymerization method and a technology for synthesizing emulsions, which are applied in the field of synthesizing emulsion-type MDQ silicone resins, can solve problems such as unsatisfactory stability of emulsion-type resins, increase production processes, etc., and achieve good industrial production prospects, stable performance and simple process. Effect

Active Publication Date: 2020-05-08
FENGHUA HUIHONG ORGANOSILICON CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0008] The MDQ silicone resin prepared in the above-mentioned prior art can be used as a reinforcing material in the release agent. However, most of the above-mentioned MDQ silicone resins are obtained through bulk polymerization. If an emulsion-type resin is required, it needs to be re-emulsified. Good body resin, which will inevitably increase the production process, and the stability of the emulsion resin obtained by emulsifying the body resin is not ideal

Method used

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  • Method for synthesizing emulsion type MDQ silicon resin by emulsion polymerization method
  • Method for synthesizing emulsion type MDQ silicon resin by emulsion polymerization method
  • Method for synthesizing emulsion type MDQ silicon resin by emulsion polymerization method

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Embodiment 1

[0024] A method for synthesizing emulsion-type MDQ silicone resin by emulsion polymerization is proposed in this embodiment, including the following raw materials in parts by weight: 150 parts of ethyl orthosilicate, 100 parts of dimethyldiethoxysilane, hexamethyldimethoxysilane 100 parts of siloxane, 20 parts of isotridecyl alcohol polyoxyethylene ether, 700 parts of deionized water. After mixing the above raw materials, pass through a homogenizer twice to obtain a crude emulsion, then transfer the crude emulsion to a flask, stir at 15-20°C, take 100 parts of deionized water and dissolve 10 parts of dodecylbenzenesulfonic acid, Prepare a catalyst solution, add the catalyst solution dropwise to the above-mentioned raw material mixture, and slowly add dropwise within 5 hours, react for 24 hours, and obtain a light blue slightly transparent emulsion. After detection by Fourier transform infrared chromatography and hydrogen nuclear magnetic spectrum, it is the target product MDQ ...

Embodiment 2

[0026] A method for synthesizing emulsion-type MDQ silicone resin by emulsion polymerization is proposed in this embodiment, including the following raw materials in parts by weight: 150 parts of ethyl orthosilicate, 100 parts of dimethyldiethoxysilane, hexamethyldimethoxysilane 100 parts of siloxane, 20 parts of sodium lauryl sulfate, 700 parts of deionized water. After mixing the raw materials, pass through the homogenizer twice to obtain a crude emulsion, then transfer the crude emulsion to a flask, stir at 15-20°C, dissolve 10 parts of dodecylbenzenesulfonic acid in 100 parts of deionized water, and prepare To form a catalyst solution, the catalyst solution was added dropwise to the above-mentioned raw material mixture, and the dropwise addition was completed slowly within 5 hours, and reacted for 24 hours to obtain a light blue slightly transparent emulsion. After detection by Fourier transform infrared chromatography and hydrogen nuclear magnetic spectrum, it is the targ...

Embodiment 3

[0028] A method for synthesizing emulsion-type MDQ silicone resin by emulsion polymerization is proposed in this embodiment, including the following raw materials in parts by weight: 150 parts of ethyl orthosilicate, 100 parts of dimethyldiethoxysilane, hexamethyldimethoxysilane 100 parts of siloxane, 3 parts of butyl titanate, 700 parts of deionized water. After mixing the raw materials, pass through the homogenizer twice to obtain a crude emulsion, then transfer the crude emulsion to a flask, stir at 15-20°C, dissolve 10 parts of dodecylbenzenesulfonic acid in 100 parts of deionized water, and prepare To form a catalyst solution, the catalyst solution was added dropwise to the above-mentioned raw material mixture, and the dropwise addition was completed slowly within 5 hours, and reacted for 24 hours to obtain a light blue slightly transparent emulsion. After detection by Fourier transform infrared chromatography and hydrogen nuclear magnetic spectrum, it is the target produ...

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Abstract

The invention discloses a method for synthesizing emulsion type MDQ silicon resin by an emulsion polymerization method, and the method mainly comprises the following steps: 1) uniformly stirring metered tetraethoxysilane, dimethyldiethoxysilane, hexamethyldisiloxane, an emulsifier and water to obtain a mixed solution; (2) uniformly stirring the mixed solution obtained in the step (1), feeding intoa homogenizer, and treating for 2-3 times under 30MPa so as to obtain a crude emulsion; and 3) transferring the crude emulsion obtained in the step 2) into another container, stirring at 15-20 DEG Cfor 24-48 hours, and slowly dropwise adding a proper amount of catalyst to obtain the light blue slightly-transparent MDQ silicon resin emulsion. The MDQ silicon resin emulsion is prepared through emulsion polymerization in one step, the process is simple, and the prepared emulsion is stable in performance and has a good industrial production prospect.

Description

technical field [0001] The invention relates to a method for synthesizing emulsion-type MDQ silicone resin, in particular to a method for synthesizing emulsion-type MDQ silicone resin by emulsion polymerization. Background technique [0002] Silicone resin has been widely used in the field of coatings as a reinforcing material. In recent years, the competition in the tire release agent market has become increasingly fierce, and the requirements for the number of releases and the cleanliness of the product have increased. Therefore, a suitable silicone resin can be prepared as a reinforcing filler for tire release agents. [0003] The preparation and application of MQ resin in the current market are mature, but when MQ resin is used as the filler of the mold release agent, when the added amount exceeds a certain value, the adhesion to the capsule will be reduced and the tire will be polluted. The reason is the degree of crosslinking of the MQ resin. too high. Therefore, it ...

Claims

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Application Information

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IPC IPC(8): C08G77/06C08G77/10C08G77/04
CPCC08G77/06C08G77/10C08G77/04
Inventor 郑泽泓陈天翔孙立新
Owner FENGHUA HUIHONG ORGANOSILICON CHEM
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