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A kind of one-component room temperature curing silicone resin containing MQ structural unit and its preparation method

A MQ silicone resin, room temperature curing technology, applied in the field of silicone resin, to achieve the effect of increased strength, good transparency, and high curing strength

Active Publication Date: 2021-10-22
中蓝晨光化工有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, as the application of high-performance silicone materials continues to expand today, although the comprehensive properties of elastoplastic silicone resins are excellent, some properties, such as flame retardancy, heat resistance, adhesion to substrates, and strength after curing, etc. Still needs to be further improved

Method used

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  • A kind of one-component room temperature curing silicone resin containing MQ structural unit and its preparation method
  • A kind of one-component room temperature curing silicone resin containing MQ structural unit and its preparation method
  • A kind of one-component room temperature curing silicone resin containing MQ structural unit and its preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0050] Add 790g of phenyltrimethoxysilane and 1040g of ethyl orthosilicate to a 3L three-necked flask, raise the temperature to 30°C, add 300g of hydrochloric acid aqueous solution with a mass fraction of 0.01% to start hydrolysis, and when the temperature rises to 70°C, add 240g MM (Chinese name is: hexamethyldisiloxane) and 60g hydrogen-containing end-capping agent, keep the temperature at 70 ° C for 4 hours, stop the reaction, add toluene for extraction, static layering, and vacuum distillation to remove the solvent to obtain a white Hydrogen-containing MQ resin E in solid powder form.

[0051] Add 1000g of methylphenyl ring body, 1000g of hydroxy silicone oil, 1g of tetramethylammonium hydroxide into a 3L three-necked flask, and raise the temperature to 65°C to balance the reaction. When the viscosity rises to about 200mpa.s and the reaction liquid becomes transparent, Raise the temperature to 140°C, keep the reaction for 1h, and remove the low boilers under reduced pressu...

Embodiment 2

[0054] Take 100g of hydrogen-containing MQ resin E described in Example 1 and dissolve it in 200g of toluene solvent, add 325g of F, 0.078g of Pt catalyst, keep the reaction temperature at 80~90°C, react for 1h, add 55g of methyltrimethoxysilane and 0.21g of Dibutyltin dilaurate, reflux for 2 hours, lower the temperature, take off the vacuum, and adjust the solid content to 70%. A room temperature curing silicone resin II was obtained.

Embodiment 3

[0056] Take 100g of the above-mentioned hydrogen-containing MQ resin E described in Example 1 and dissolve it in 200g of toluene solvent, add 350g of F, 0.0812g of Pt catalyst, keep the reaction temperature at 80~90°C, react for 1h, add 60g of methyltrimethoxysilane and 0.225g of Isopropyl titanate, reflux for 2 hours, lower the temperature, take off the vacuum, and adjust the solid content to 70%. A room temperature curing silicone resin III was obtained.

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Abstract

The invention discloses a one-component room-temperature-curable silicone resin containing MQ structural units and a preparation method thereof. The silicone resin is formed after condensation reaction of hydrogen-containing MQ silicone resin and phenylhydroxy silicone oil or phenylhydroxy silicone resin. It is obtained by adding hydrocarbyl alkoxysilane and capping in the presence of a catalyst. The silicone resin prepared by this method can significantly increase the strength of the room temperature curing silicone resin, and has better mechanical properties, electrical properties and excellent after curing. The three-proof performance has broad application prospects in the field of conformal coatings.

Description

technical field [0001] The invention relates to a one-component room-temperature-curing silicone resin containing MQ structural units and a preparation method thereof, in particular to a one-component room-temperature-curing elastic-plastic silicone resin containing MQ resin and a preparation method thereof, belonging to the technical field of silicone resins. Background technique [0002] Silicone resin is a high polymer with Si-O bond as the main chain. Si-O bond energy is large and the structure is stable. Therefore, silicone resin has good temperature resistance, weather resistance and corrosion resistance, and can effectively Extend the service life of the coating and reduce maintenance costs. The elastoplastic silicone resin material in silicone resin has the characteristics of both resin and rubber, so after curing, it has both the flexibility of rubber and a smooth surface, and has high and low temperature impact resistance and high frequency dielectric properties. ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G77/44C08G77/38C08G77/12C09D183/04
CPCC08G77/12C08G77/38C08G77/44C09D183/04
Inventor 李霞朱良波唐小斗
Owner 中蓝晨光化工有限公司
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