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All-purpose MQ silicone resin! From defoaming to waterproofing, it's indispensable!
2025-07-29
Versatile MQ silicone resin! From defoaming to waterproofing, it's indispensable!
What is MQ silicone resin?
MQ type silicone resin is a silicone resin with a rather unique structure. It is composed of 4/2 a compound containing tetrafunctional siloxane units (SiO silicone a compound containing monofunctional siloxane units (R 3 SiO 1/2 , M) through a co-hydrolysis and polycondensation reaction to form a three-dimensional spherical structure. Generally, MQ silicone resin is considered to have a double-layered structure of tightly packed spheres. The core of the sphere has a higher silicon-oxygen bond density and a cage-like silica with a degree of polymerization of 15-50, while the shell has a lower density R silicone layer. 3 SiO 1/2 Applications of MQ Silicone Resin
- 1. Defoaming Agent Field:
Improve the high-temperature resistance, alkali resistance, and foam suppression performance of defoaming agents
1.1. MQ can be used to prepare high-temperature and strong alkali-resistant
defoaming agents silicone Application in high-temperature and strong alkali-resistant defoaming agents: This mainly involves synthesizing highly branched network polymers by adding medium-to-high viscosity hydroxyl silicone oil and MQ silicone resin to improve the high-temperature and strong alkali resistance of the defoaming agent. The dosage is between 5-10%.
1.2. Preparation of defoaming agents by compounding MQ silicone resin with polyether-modified silicone oil
The smaller the MQ ratio, the more complex the spatial network structure, and the better the foam suppression performance of the defoaming agent. However, if it is too small, it is difficult to dissolve in methyl silicone oil.
2. Release Agent Field:
Improve the demolding durability of release agents, and the demolding effect is more ideal for highly adhesive resins (such as polyurethane, epoxy resin, etc.);
3. Waterproofing Agent Field:
The structure of polysiloxane determines that silicone resin has water repellency. Its contact angle with water is greater than 90°, so it is used in waterproof materials.
4. Silicone Rubber Reinforcing Filler:
Using MQ silicone resin as a reinforcing agent, liquid silicone rubber products have certain mechanical strength and high light transmittance, and the raw material has good fluidity before vulcanization;
5.
Pressure-sensitive adhesive reinforcing and tackifying agent: silicone Adjust cohesive force, adhesive force, and initial tack;
6. Cosmetics Field:
Used as a surface protective coating, it can eliminate the sticky feeling of silicone oil, improve smoothness and scratch resistance, and enhance gloss;
7. Release agent regulator for addition-type anti-blocking agents:
Vinyl MQ silicone resin can be used as a release agent regulator for addition-type anti-blocking agents;
8. Hydrogen-containing MQ silicone resin is mainly used as a crosslinking agent for silicone rubber vulcanized by hydrosilylation and a raw material for other modified MQ silicone resins;
9. Other applications not yet mentioned and to be developed
Classification and Structure of MQ Silicone Resin
- Classification
Due to the different organic groups R on the shell, MQ silicone resin has many different types:
When all R are methyl groups, it is called methyl MQ silicone resin or simply MQ silicone resin;
When part of R is vinyl, it is called methyl vinyl MQ silicone resin;
When part of R is H, it is called methyl hydrogen-containing MQ silicone resin;
There are also methyl phenyl MQ silicone resin, vinyl MQ silicone resin, phenyl MQ silicone resin, fluorine-containing MQ silicone resin, MDQ, MTQ silicone resin, etc.
Structure
R
(SiO 3 )m(SiO 1/2 )n 4/2 R is an organic group such as methyl, vinyl, hydrogen, or phenyl
Characteristics of MQ Silicone Resin
1. Excellent heat resistance and low-temperature performance, usable in environments from -60°C to +300°C.
2. Good weather resistance, aging resistance, and resistance to ultraviolet irradiation.
3. Excellent water repellency.
4. Good adhesion performance.
5. Excellent insulation performance.
5、优异的隔离性能。
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