Silicone Film Shine (Polyphenylsilsesquioxane (and) Isododecane), 1.44 RI is a 70% phenyl-substituted silicone film-forming resin in isododecane, supplied as a colorless to slight yellow transparent liquid.

Refractive Index 1.44 (glossy)

After application, the volatile isododecane phase evaporates and leaves a thin polyphenylsilsesquioxane film that helps improve adhesion, color uniformity, color retention, and wear while keeping a clearer and glossier optical profile than many matte-oriented silicone film systems.

This product should be treated as a performance resin for formulators rather than a biological skin active. Final aesthetics depend on resin solids, pigment and wax load, volatile-to-nonvolatile balance, plasticizing emollients, and how much isododecane is lost during processing, filling, and storage.

Product Description: Suitable for glossy or satin long-wear complexion products, primers, concealers, lip products, eyeliner, mascara, sunscreen primers, and hair-shine or styling systems where a flexible reflective film is preferred over a soft-focus matte finish.

- In foundation, primer, and concealer systems, it helps improve pigment anchoring, reduce rub-off, and support more even color laydown. At moderate use levels it can improve wear and optical smoothness without making the finish as powdery as many polymethylsilsesquioxane-dominant systems.

- In lip, eyeliner, and mascara systems, it can strengthen film integrity and improve transfer resistance while maintaining more gloss than a matte film package. Balance with waxes, elastomers, and plasticizing emollients to avoid brittle dry-down or shrink feel after the carrier evaporates.

- In sunscreen primers and hybrid skincare-makeup systems, it can help improve continuity of the applied layer and support comfortable wear, but water resistance and SPF performance must always be verified on the finished formula.

- In hair serum and styling-shine products, the deposited film can improve surface smoothness and reflective shine. Keep resin solids controlled to avoid coated feel, stiffness, or excessive buildup on fine hair.

- Compared with many polymethylsilsesquioxane-based film systems, the phenyl-containing resin is typically a better starting point when the brief calls for gloss, clarity, and richer color appearance rather than a deliberately matte or blurred finish.

Usage: Film-forming additive for foundation, primer, concealer, lip products, eyeliner, mascara, sunscreen primer, hair serum, and styling-shine products.

Mixing method:

- Add into the silicone phase or compatible volatile oil phase such as isododecane-rich, isoalkane, or silicone-fluid systems. It is easiest to handle after premixing with compatible volatile carriers or light silicone/oil-phase solvents.

- Do not add directly into the water phase. For emulsions, place it in the oil or silicone phase before emulsification, or post-add during cool-down only if the finished emulsion can accept a volatile resin concentrate without instability.

- Keep processing temperature as low as practical and preferably below 45°C during late processing. Prolonged open heating, strong vacuum, or unnecessary high shear can strip isododecane, increase apparent viscosity, and shift the final solids level.

- Final pH in most finished systems is typically around pH 4-8. The main control points are phase placement, solvent compatibility, and evaporation management rather than pH adjustment of the resin itself.

Usage rate: 1-20%

Use 1-20% of this 70% resin solution, which delivers about 0.7-14% film-forming solids. Typical starting points are about 2-5% in primer, foundation, or concealer, 3-15% in lip and eye products depending on the rest of the film package, and about 0.5-5% in hair-shine serum or light styling products.

Product characteristics: Colorless to slight yellow transparent liquid; viscosity 5-50 mPa.s at 25°C; refractive index 1.435-1.445 at 25°C.

Solubility: Insoluble in water. Compatible with isododecane, many silicone fluids, and selected low-polarity oil-phase solvents. Evaluate compatibility before adding into high-water, high-polarity, or very wax-heavy systems.

Storage: Store tightly closed at room temperature and minimize prolonged open-air processing to limit volatile-carrier loss.