Epoxy MQ Silicone Resin CAS 67763‑19‑3 is epoxy‑grafted M‑Q structured silicone resin synthesized via co‑hydrolysis and polycondensation of epoxy‑containing silane, methyl silane and tetrafunctional silicate monomers. Reactive epoxy side‑chains are distributed on the three‑dimensional siloxane framework. The epoxy content can be tailored during production. It is applied for adhesion promotion and polymer modification, improving interfacial affinity between silicone and organic resin substrates i

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Epoxy MQ Silicone Resin CAS 67763‑19‑3, Epoxy‑Functional MQ Resin for Adhesion Promotion & Polymer Modification

This epoxy‑functional MQ silicone resin is manufactured by controlled co‑hydrolysis and polycondensation of epoxy‑substituted alkoxysilane, methyl alkoxysilane and tetraalkoxysilane precursors. Its molecular structure is constructed from monofunctional M‑units and tetrafunctional Q‑units. Epoxy groups are covalently grafted onto the side segments of the rigid three‑dimensional siloxane skeleton. The epoxy group loading is adjustable through feed ratios during synthesis to meet different formulation requirements for adhesion enhancement and polymer modification.

Different from non‑functional methyl MQ silicone resin, the pendant epoxy moieties provide reactive sites that can undergo ring‑opening curing reactions with amine, acid anhydride, carboxyl and hydroxyl functional groups of organic polymer systems. The silicone‑rich MQ segment delivers low‑surface‑energy, heat‑resistant silicone characteristics, whereas epoxy moieties establish chemical linkage with organic‑phase resin molecules. This unique dual‑property structure mitigates interfacial incompatibility between silicone and conventional organic polymers.

When used as an adhesion‑promoting additive for silicone‑epoxy hybrid coatings and adhesives, the resin strengthens interfacial bonding toward metal, glass and mineral substrates. It reduces interfacial delamination under thermal cycling stress and improves long‑term bonding durability of composite assemblies.

For polymer modification applications, this epoxy MQ silicone resin is incorporated into epoxy resin, phenolic resin and other thermosetting polymer systems. It introduces silicone segments into the cured organic network, lowering internal curing stress, enhancing thermal‑shock resistance and improving surface release and anti‑scratch performance of cured organic polymer articles.

The resin shows good solubility in aromatic hydrocarbon solvents, ketone‑based solvents and compatible silicone fluids. Formulation curing conditions must be matched with corresponding hardeners such as amine or anhydride curing agents. Improper hardener stoichiometry will lead to incomplete ring‑opening reaction of epoxy groups, which results in insufficient interfacial adhesion and poor modification efficiency.

During compounding processing, moderate‑speed stirring is recommended to achieve uniform dissolution and dispersion within base resin systems. Localized high‑temperature shearing should be avoided, because excessive heat may induce premature self‑ring‑opening of epoxy groups and generate partial gel particles inside the formulation.

The product should be stored in hermetically sealed packaging under cool and dry conditions, away from amine‑containing hardener materials. During raw‑material handling, cross‑contamination with acidic or alkaline impurities must be strictly prevented, which could trigger premature epoxy ring‑opening and cause viscosity increase or gelation. This epoxy‑functional MQ silicone resin is a dedicated interfacial modifying raw material for adhesion promotion and thermoset polymer modification.

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Jishengya Technology

Shenzhen Jishengya Technology Co., Ltd. is located in Shenzhen, a special economic zone, and is a comprehensive technology enterprise integrating independent R&D, production and sales.