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Preparation method of Fe<3+> modified organosilicon resin

A silicone and resin technology, applied in the field of preparation of modified silicone resin, can solve the problems of complex process, introduction of coupling agent, unsuitability for large-scale production, etc., and achieve the effect of simple operation and reduced preparation cost

Inactive Publication Date: 2013-02-13
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The present invention aims to solve the existing problems of introducing a coupling agent in the method for modifying silicone resin, increasing the preparation cost, complicated process, and unsuitable for large-scale production, and provides a Fe 3+ Preparation method of modified silicone resin

Method used

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Examples

Experimental program
Comparison scheme
Effect test

specific Embodiment approach 1

[0007] Specific implementation mode one: a kind of Fe in this implementation mode 3+ The method for modifying silicone resin is specifically completed in the following steps:

[0008] 1. Preparation of ferric hydroxide sol: prepare a saturated ferric chloride solution at a temperature of 25°C to 30°C, then add the saturated ferric chloride solution dropwise to boiling distilled water at a temperature of 25°C to 30°C. Stir at 200-500 rpm for 30-120 min to obtain ferric hydroxide sol with a molar concentration of 1-10 mol / L; 2. Mixing: at a temperature of 25°C-30°C, the stirring speed is 200-500 rpm Under the condition of 1-10mol / L ferric hydroxide sol, the molar concentration prepared in step 1 is added to the mixed solution of methyltriethoxysilane, absolute ethanol and water, and then the mixed solution is mixed with hydrochloric acid Adjust the pH to 4-6 to obtain an acidic mixed solution; 3. Polymerization reaction: react the acidic mixed solution prepared in step 2 at 60°...

specific Embodiment approach 2

[0019] Specific embodiment two: the difference between this embodiment and specific embodiment one is: the molar concentration prepared in step one described in step two is the ferric hydroxide sol of 1~10mol / L and methyltriethoxysilane The mass ratio is (2-20):100. Others are the same as in the first embodiment.

specific Embodiment approach 3

[0020] Specific embodiment three: the difference between this embodiment and specific embodiment one or two is that the molar concentration prepared in step one described in step two is 1~8mol / L ferric hydroxide sol and methyl triethoxy The mass ratio of base silane is (2~20):100. Others are the same as in the first or second embodiment.

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Abstract

A preparation method of a Fe<3+> modified organosilicon resin relates to a preparation method of a modified organosilicon resin. Present modified organosilicon resin preparation methods require the addition of a coupling agent, more preparation cost and a complex technology, and are not suitable for large-scale production. The invention aims to solve the above problems of the present modified organosilicon resin preparation methods. The preparation method provided by the invention comprises the following steps of: mixing ferric hydroxide sol, methyl triethoxysilane, water and anhydrous ethanol, performing a heating reaction, removing water and ethanol by distillation to obtain the Fe<3+> modified organosilicon resin. The invention has the following advantages of: firstly, a coupling agent isn't added so as to reduce the preparation cost; secondly, the preparation method provided by the invention is simple to operate so as to realize large-scale production; and finally, according to the prepared Fe<3+> modified organosilicon resin, its initial decomposition temperature is raised by 30-50 DEG C and its secondary decomposition temperature is increased by 55-75 DEG C. The invention is mainly used to prepare the Fe<3+> modified organosilicon resin.

Description

technical field [0001] The invention relates to a preparation method of a modified silicone resin. Background technique [0002] Silicone resins are widely used in aerospace, automobile manufacturing, electronics industry, construction and medical treatment. Although silicone resin has good heat resistance, in order to be used in high-tech fields such as aerospace, its heat resistance still needs to be improved. At present, there are three main methods to improve the heat resistance of silicone resins, (1) changing the structure of side groups; (2) changing the structure of the main chain; (3) adding high temperature resistant fillers, etc. Changing the structure of polysiloxane side groups and main chains is mainly to introduce heat-resistant groups into the structure of polysiloxane, such as heat-resistant bulky segments or aromatic rings. Toluene is often used as a reaction solvent, which has a certain Toxic, and volatile, pollute the environment; use some metal oxides ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G77/06C08K3/22
Inventor 蔡伟陈向群隋解和高智勇吴迪孟宪福
Owner HARBIN INST OF TECH