What is MQ Silicone Resin? Introduction
The silicone MQ silicone structure is: a silicone resin with a core composed of SiO4/2 polymer (i.e. Q) and a tight double-layer cage structure composed of trimethylsiloxy end-capped (i.e. M) on the outside, with a white loose powder or a sheet solid.
In addition to containing Si-OH groups, it can also contain other active groups. The MQ resin with all trimethyl endangered peripherals is methyl MQ silicone resin; when part of the methyl group in the methyl MQ silicone resin is replaced by Vi group, it is a methylvinyl MQ silicone resin, and when part of the methyl group is replaced by Me2HSiO- group, it is a hydrogen-containing MQ silicone resin. Due to this special molecular structure, MQ silicone resin is easily dissolved in organic solvents such as toluene and xylene. The solution is clear and colorless, and has good mechanical properties, insulation, moisture-proof and waterproofing and high and low temperature resistance.
MQ Silicone Resin Features
✔ Excellent reinforcement
✔ Colorless and transparent finished product
✔ Forms a durable protective film after curing
✔ Excellent weather resistance, electrical insulation, and moisture and water repellency
Preparation Process
MQ silicone resin is synthesized using a hydrolysis-polycondensation reaction:
Raw Material Mixing: An organosilicon monomer containing M units (such as hexamethyldisiloxane) is mixed with an inorganic silicon source containing Q units (such as tetraethyl orthosilicate).
Hydrolysis: Under the action of an acidic or alkaline catalyst, the monomer hydrolyzes to form a silanol intermediate.
Polycondensation: Silanols condense to form a Si-O-Si bond network.
Post-Processing: Neutralization, impurity removal, and concentration are performed to obtain the finished product, which can be a colorless, transparent, viscous liquid or a solid.
Application of MQ Silicone Resin
Electronics Industry
Encapsulation Materials: Used in integrated circuit chips, LED encapsulation adhesive substrates, and high-temperature sensor potting, protecting components from moisture and impurities.
Pressure-Sensitive Adhesives and Optical Adhesives: Serves as a tackifier or release modifier to enhance tape performance (for example, Wanhua Chemical's new product enhances the light transmittance and adhesion of OCA optical adhesives).
Heat Dissipation Materials: Utilizes thermal conductivity for applications in computer heat sinks, mobile phone heat sinks, and other applications
Specialty Coatings
High-Temperature Coatings: Used for insulation, bonding, and sealing of Class H motors, withstanding extreme temperatures.
Building Sealing: Waterproofing doors, windows, and roofs to extend building life.
Decorative Materials: Provides corrosion resistance and aesthetic appeal in exterior wall coatings and interior decoration.
Automotive Manufacturing
Components: Engine parts, body seals, and other components withstand mechanical stress and corrosive environments.
Interior Design: Provides flexibility and wear resistance in instrument panels, seats, and other applications.
Medical Industry
Medical Devices: Utilizes biocompatibility and corrosion resistance in the manufacture of catheters and stents.
Equipment Encapsulation: Protects ultrasound equipment, X-ray machines, and other devices from environmental impacts.
Other Applications
Release Agents: Used for releasing high-adhesion materials such as polyurethane and epoxy resins.
Defoamers: Improve high-temperature resistance and foam suppression, suitable for industrial processes.
Cosmetics: Used as a film-forming agent to eliminate the stickiness of silicone oils and improve slip and gloss.
With the rapid development of the electronics, automotive, and medical industries, demand for MQ silicone resins continues to grow. In the future, by introducing functional groups (such as vinyl and hydrogen-containing groups) or modification techniques (such as epoxy and chloromethyl modification), their applications in high-end fields such as flexible electronics and biomedical materials can be further expanded.
