Mingyi silicone（anhui）co,.ltd
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Among functional organosilicone materials, acrylate-modified silicone oils occupy a unique position due to their ability to combine the low surface energy of silicone with the reactivity of acrylic chemistry. Within this category, single-end (mono-functional) acrylate silicone oils have gained increasing attention for resin and coating modification, thanks to their controlled structure and predictable performance.
Single-end acrylate silicone oil refers to an organosilicone compound in which only one acrylate functional group is introduced at one end of the siloxane chain, while the remainder of the molecule consists of a flexible silicone backbone.
Unlike di-functional or multi-functional acrylate silicones, the single-end structure provides:
One defined reaction site
Minimal risk of uncontrolled crosslinking
Excellent compatibility with acrylic systems
Stable modification without excessive viscosity increase
This structural simplicity is the key reason why single-end acrylate silicone oils are widely used as reactive modifiers rather than crosslinkers.
With a relatively low molecular weight (approximately 300–400) and high active content, single-end acrylate silicone oils can be easily incorporated into resin or emulsion systems.
Their performance advantages include:
Permanent Silicone Effect
Because the acrylate group participates directly in polymerization, the silicone segment becomes chemically bound to the polymer matrix. This prevents migration, blooming, or surface exudation commonly associated with non-reactive silicone additives.
Low Surface Energy Enhancement
The siloxane chain naturally reduces surface energy, improving slip, smoothness, anti-blocking, and stain resistance.
Preserved Mechanical Balance
The mono-functional structure avoids excessive crosslink density, maintaining flexibility and toughness in the final film.
During acrylic resin or emulsion synthesis, single-end acrylate silicone oil acts as a co-monomer or reactive modifier.
The mechanism can be summarized as follows:
The acrylate group undergoes free-radical polymerization with acrylic monomers
The silicone chain becomes part of the polymer architecture
During film formation, the silicone segment preferentially migrates toward the surface
A stable, silicone-enriched surface layer is formed without phase separation
This “internal modification” approach ensures long-term performance stability.
Soft-Touch and Durable Feel Coatings
At low addition levels (0.2–1%), the coating exhibits a smooth, silky, and non-greasy feel with long-lasting effect.
Anti-Stain and Easy-Clean Coatings
At higher dosages (2–6%), the silicone-modified surface significantly reduces contaminant adhesion.
Acrylic Resin and Emulsion Modification
Reactive incorporation improves water resistance, weatherability, and chemical durability.
Curable Coating Systems
In UV or thermally cured systems, single-end acrylate silicone oil enhances flow, leveling, and substrate wetting without compromising curing behavior.
Single-end acrylate silicone oils are suitable for both water-based and solvent-based systems. For best results, they should be introduced during resin synthesis or at an early mixing stage to ensure full reaction and uniform distribution.
Single-end acrylate silicone oil is not a conventional silicone additive, but a precisely designed reactive organosilicone modifier. Its greatest value lies in delivering stable, durable silicone benefits while preserving the intrinsic properties of the base resin.
For formulators seeking controlled performance enhancement, long-term stability, and differentiated coating functionality, single-end acrylate silicone oils represent a highly effective and reliable solution.
