Sun Care

The Challenges of Modern Sunscreen Formulation

Formulating high-SPF sunscreens presents a convergence of challenges: physical UV filters that cause a white cast, organic filters that are difficult to dissolve, and a strict requirement for substantive water resistance during swimming or perspiration. Simultaneously, modern sunscreens must maintain a lightweight, non-greasy profile on the skin. Manta’s sun care portfolio addresses these conflicting demands through specialized compatibilizers, film-formers, and carriers that optimize both sensory quality and SPF performance.

Dispersing Physical UV Filters: Eliminating the White Cast

For mineral sunscreens containing TiO₂ or ZnO, particle agglomeration is the primary cause of the white cast effect and suboptimal SPF delivery. Manta F1042 (Caprylyl Trimethicone) functions as an efficient wetting agent for inorganic UV filters. Its caprylyl alkyl group bridges the polarity gap between the pigment surface and the oil phase, ensuring uniform particle distribution—improving the visual finish and maximizing measured SPF by guaranteeing full skin surface coverage. Manta 1042A (Caprylyl Silicone, MT-type) provides complementary wetting with high compatibility in natural oil and hydrocarbon solvent systems for organic-hybrid mineral formulations.

Manta F1230 (Bishydroxyethoxypropyl Dimethicone) acts as a carbinol-functional suspension agent, preventing pigment sedimentation and ensuring long-term stability in sunscreen emulsions and fluids with high powder loading.

Water Resistance: Durable UV Filter Anchoring

To satisfy Water-Resistant (80-minute) regulatory claims, UV filters must remain anchored to the skin surface through immersion and perspiration. Manta A202 (Trimethylsiloxysilicate, MQ Resin) provides the required durability for this application. Its three-dimensional hydrophobic film network physically traps UV filter molecules against washoff. When pre-dissolved in Manta F1006 (2 cSt) volatile dimethicone carrier, it delivers a rapid-dry, non-sticky application. Manta A2024 (MQ-T Propyl hybrid resin) provides equivalent water resistance with an improved soft-touch film—eliminating the tightening sensation of standard resins, and offering high compatibility with organic UV filter systems in clean-label formulations.

UV Filter Solubility and Oil-Phase Optimization

Organic UV filters such as Avobenzone, Homosalate, and Octisalate present significant solubility challenges at the high loading levels required for SPF 50+ formulas. Manta F1057 (Phenyl Trimethicone) is a non-volatile, high-refractive-index silicone emollient with demonstrated solubilizing capacity for common organic UV filters. It reduces the soaping or white-rub-out effect often seen in O/W sunscreen emulsions, while contributing a clear finish. Manta F1046 (Tetradecamethylhexasiloxane) and Manta F1042 function as lightweight co-solvents that reduce the overall greasiness of heavy organic filter loads without compromising UV efficacy.

After-Sun and Daily UV Formulations

The after-sun segment demands ingredients that restore moisture balance and sensory comfort. Manta F1016C (Cyclopentasiloxane & Dimethiconol) and Manta F1017 (Dimethiconol & Dimethicone) deposit substantive, breathable conditioning films that soothe stressed skin while improving the spreadability and absorption of panthenol, aloe vera, and other active ingredients. For daily-use tinted UV fluids and BB SPF products, the W/Si emulsification system—Manta E1011, E1035, and E1036—provides the emulsion architecture for stable formulations that perform as both skin care and photoprotection.

Recommended Formulation Ingredients