Incorporating Vinyl Film (VP/Hexadecene Copolymer) into a hot oil phase with Tinosorb S before Emulsification
Asked by: Anonymous
On: October 20, 2025
Product Type:
Cosmetics
Question
I plan to use Vinyl Film (Medium Wear, Soft) (VP/Hexadecene Copolymer) as a film former in a formulation that also uses Tinosorb S as a UV filter. Since Tinosorb S requires melting at 80°C, I have a question regarding the incorporation process:
- If I melt the UV filter (Tinosorb S) and maintain the temperature at no more than 80°C, can I add the Vinyl Film (Medium Wear, Soft) (VP/Hexadecene Copolymer) as the final ingredient?
- Can I simply stir the mixture until the Vinyl Film dissolves without applying additional heat, and then proceed immediately to emulsification?
Answer
Yes, your proposed process is correct and acceptable.
The Vinyl Film (Medium Wear, Soft) (VP/Hexadecene Copolymer) (ID: 2227) is an oil-soluble polymer that requires heat to be fully incorporated into the oil phase.
Since your oil phase is already heated to 80°C to melt the Tinosorb S, this temperature is sufficient to dissolve the VP/Hexadecene Copolymer.
Recommended Procedure:
- Heat your oil phase ingredients, including Tinosorb S, to 80°C until the Tinosorb S is fully melted and dissolved.
- Add the Vinyl Film (VP/Hexadecene Copolymer) to the 80°C oil phase.
- Maintain the temperature at 80°C (or slightly below, as long as it stays hot) and stir until the Vinyl Film is completely dissolved and the oil phase is clear and homogeneous.
- Once both phases (oil and water) are at the desired emulsification temperature (typically 70-80°C), proceed with the emulsification process.
The key is to ensure the polymer is fully dissolved before moving to the emulsification step.
