Bifunctional Chlorosilane—A High-Quality Termination Solution for High-Performance End-Functional Polysiloxanes Changfu MA11

In the field of high-performance materials such as UV-curable coatings, acrylic-modified additives, and electronic protective coatings, the demand for mono-end reactive polysiloxanes continues to rise. Compared to difunctional silicone oils, monofunctional structures have reactive groups that can polymerize only on one side of the molecular chain. This effectively imparts low surface energy and a smooth feel to the coating without significantly increasing the system's viscosity, and it is less prone to fogging or migration issues. It is the core raw material for high-end silicone-modified resins.

ChangFu^® MA11 {3-Methacryloxypropyldimethylchlorosilane; CAS No.: 24636-31-5} features molecules with both highly active chlorosilyl groups and polymerizable methacryloyloxy double bonds. Through the directional substitution reaction of chlorosilane, it can accurately introduce acrylic active double bonds at one single chain end of silicone oil. It effectively addresses industry-wide challenges including difficult synthesis of mono-terminated silicone oil, excessive by-products and uncontrollable functionality, serving as an excellent end-capping agent for manufacturing high-performance mono-terminated reactive polysiloxanes.

1. Product features:

• High-activity chlorosilane, precise single-end capping

The molecular structure contains a single Si-Cl active site, making it easy to obtain single-end methacryloxy siloxane with uniform functionality and narrow molecular weight distribution.

• Excellent adaptability for free radical copolymerization

The methacryloyl unsaturated double bonds in the molecule can undergo free radical copolymerization with organic monomers containing unsaturated bonds such as acrylates, methacrylates and styrene under the action of initiators. This introduces flexible organosilicon segments into the main polymer chain and enables modification of the copolymer structure.

• Long-term optimization of comprehensive material performance

The introduced organosilicon side chain structure can precisely regulate the solubility and compatibility of copolymers, and significantly improve the low-temperature toughness, thermal decomposition stability, weather resistance and hydrophobic performance of the resin system. Meanwhile, this structure helps reduce the surface energy of cured films, endowing substrates with mold release property, antifouling performance and low-friction characteristics to meet the demands of high-performance surface engineering.

2. Industrial Application Scenarios:

• Synthesis of Silicone-Modified Copolymer Resins

As a functional end-capping monomer, it participates in copolymerization reactions with styrene, acrylic acid and methacrylate monomers to produce silicone-modified acrylic resins and UV-curable emulsion systems featuring excellent temperature resistance and water resistance.

• Silicone Surface Engineering Additives

Applied for graft modification of acrylic active side chains on the surface of silicone materials such as silicone oil, silicone rubber and silicone gel. It effectively improves the compatibility between silicone substrates and conventional acrylic adhesives & coatings, eliminates the risk of interfacial delamination, and drastically boosts interfacial bonding strength.

• High-End Functional Coatings with Low Surface Energy

Suitable for manufacturing optical-grade transparent acrylic resins, long-term non-stick coatings and anti-fingerprint functional films. Widely used in optical lenses, flexible optical substrates, precision release coatings and other fields, delivering both high light transmittance and hydrophobic anti-fouling performance.

ChangFu^® MA11 enables precise and controllable synthesis of mono-terminated silicone oil via highly active chlorosilane end-capping. The methacryloxy double bond endows finished products with copolymerization modification capacity. It is an irreplaceable premium end-capping agent for mass production of high-quality mono-terminated reactive polysiloxanes, as well as a core functional raw material for high-performance silicone-modified polymers, low-surface-energy optical coatings and interfacial modification of silicone materials.

For more product documents and application information, please contact:

Mobile: (+86) 181-6277-0058

Email: sales@cfsilanes.com

Key words: 3-Methacryloxypropyldimethylchlorosilane; CAS No.: 24636-31-5; End-Functional Polysiloxane; End-capping agent.