MQ silicone resin

MQ silicone resin is a special type of organic silicon polymer polysiloxane compound with a unique double-layer structure and compact spherical structure. The following is a detailed introduction about MQ silicone resin:

1. Composition and Structure

• MQ silicone resin is composed of monofunctional Si-O units (M units) and tetrafunctional Si-O units (Q units).

• The ratio of M units to Q units (MQ ratio) in its molecular structure is usually between 0.5 and 0.8:1.

2. Physical properties

• MQ silicone resin is generally a colorless transparent liquid or powder.

• As a liquid, its solid content (heated at 150 ℃ for 2 hours) can reach 50%.

3. Chemical properties and characteristics

• MQ silicone resin has excellent heat resistance, film-forming properties, adhesion, water repellency, aging resistance, and resistance to ultraviolet radiation.

• The introduction of vinyl and hydrogen containing groups into the molecular structure can be used for hydrosilylation modification.

4. Application Fields

• MQ silicone resin can be used as a thickening agent for organic silicon pressure-sensitive adhesives, building sealants, organic resin coatings, etc.

• It is also used in mobile phone buttons, epoxy adhesive bonding surfaces, and other applications.

• Can be used as a reinforcing filler for RTV rubber, HTV rubber, additive liquid silicone rubber, and hot vulcanized silicone rubber compound.

• Can be used as a shell less encapsulation material for semiconductor components.

• It is also applied in the production of high-temperature resistant coatings, insulation and bonding of H-grade motors, and sealing.

• As a reinforcing agent in additive liquid silicone rubber, the reinforced silicone rubber is colorless and transparent, with high mechanical strength.

• It can be used for making various waterproof coatings and is an excellent material for making lipstick in daily chemical industry.

• As a basic raw material added to defoamers, it can improve their defoaming and anti foaming abilities.

5. Preparation method

• MQ silicone resin is usually prepared by the sol gel method. The main raw material of M chain link is hexamethyldisiloxane (MM) or trimethylmonochlorosilane, and the main raw material of Q chain link is water glass (sodium silicate) or tetraethyl orthosilicate (TEOS).

6. Packaging and Storage

• MQ silicone resin is usually packaged in 25kg cardboard drums or 200kg plastic drums.

• Storage period: Sealed storage at room temperature, solution for six months, powder for one year. Storing for more than the best use period indicated on the label does not mean that the product cannot continue to be used, but it needs to be retested.

7. Safety and Environmental Protection

• MQ silicone resin should comply with corresponding safety regulations during use and storage, avoiding direct contact with the skin and inhalation of its vapors.

• In the production and application process, it is necessary to pay attention to reducing the generation of hazardous waste and ensuring the environmental friendliness of the production process.

In summary, MQ silicone resin is an organic silicon polymer material with excellent performance and wide application prospects.