Single-End Epoxy Silicone Oil: A Powerful Performer in Surface Modification

Single-end epoxy silicone oil is a reactive silicone oil in which only one terminus of the linear polydimethylsiloxane (PDMS) molecular chain bears an active epoxy functional group.

X: bearing an epoxy functional group

One terminus of the molecule features a non-reactive end-capping structure that does not participate in reactions, continuously providing the superior properties inherent to polydimethylsiloxane — including low surface tension, hydrophobicity and stain resistance, and a smooth, supple hand feel.

The epoxy functional group at the other terminus can undergo ring-opening reactions with a variety of compounds containing amine, anhydride, phenolic, or carboxyl groups, forming graft copolymers with pendant organosilicon chain segments and achieving chemical bonding with organic resins.

Compared with block organic resins modified by dual-end epoxy silicone oil, organic resins modified by single-end epoxy silicone oil exhibit superior performance in stain resistance, anti-adhesion, hydrophobicity, and smoothness. This is because, during film formation of the modified resin, the characteristic comb-like structure of the pendant polysiloxane segments tends to preferentially segregate and enrich at the surface, imparting the inherent properties of the organosilicon segments to the material surface. This allows ideal surface modification effects to be achieved without high addition levels, offering superior cost-effectiveness. These attributes give it unique advantages in applications such as anti-fouling coatings, release coatings, hand-feel modifiers, leather treatment, and powder treatment.

Schematic illustration of surface segregation: pendant polysiloxane segments preferentially migrate to the coating surface during film formation

Key Application Areas

Anti-Fouling Coatings: Stain-resistant and hydrophobic properties, anti-graffiti performance

Release Coatings: UV-curable anti-adhesive release agents, non-migratory and non-contaminating

Leather Treatment: Stain resistance, smoothness, excellent hand feel

Powder Treatment: Superior anti-settling and dispersibility

Generally, the higher the molecular weight of the single-end epoxy silicone oil, the more pronounced the organosilicon characteristics such as smoothness and hydrophobicity, but the poorer the compatibility with organic resins; conversely, the lower the molecular weight, the better the compatibility with organic resins, the stronger the reactivity, and the easier it is to achieve chemical bonding.

Inverse relationship: higher molecular weight enhances organosilicon properties but reduces resin compatibility

To meet your diverse needs, Cheerchem offers single-end epoxy silicone oils with varying molecular weights, different epoxy functionalities, and polyether-modified series, providing flexible selection options to easily balance modification performance with system compatibility, empowering material upgrades.

Product Portfolio

Product Name	Grade	Chemical Structure	Chain Length
Single-End Mono-Epoxy Silicone Oil	Cheersil 8211		Short
	Cheersil 8213		Medium
	Cheersil 8218		Long
Single-End Mono-Epoxy Polyether Silicone Oil	Cheersil 8233		Medium
	Cheersil 8238		Long
Single-End Di-Epoxy Silicone Oil	Cheersil 8251		Short
	Cheersil 8253		Medium
	Cheersil 8258		Long

More structures, more molecular weights, more functionalities = more possibilities.

Cheerchem — Customized development, inviting you to co-create.

About Cheerchem

Cheerchem is a high-tech enterprise specializing in the R&D, production, and sales of functional organosilicon materials, lithium battery electrolyte additives, and electrolytes. The company operates four subsidiaries: Shandong Cheerchem Advanced Material Co., Ltd., Fuzhou Cheerchem New Energy Material Co., Ltd., Suzhou Qizhu Advanced Material Co., Ltd. and Hangzhou Silong Material Technology Co., Ltd. The production capacity of functional organosilicon products reaches nearly 30,000 tons/year, meeting diverse customer requirements.

Cheerchem consistently upholds the core values of “Integrity, Dedication, and Innovation,” focusing on providing customers with high-end, premium, and innovative products. Through green technology-driven high-quality development, the company creates value for customers and adds brilliance to the world.