Hydrogenated Styrene Methylstyrene Indene Copolymer
What is Hydrogenated Styrene Methylstyrene Indene Copolymer?
Hydrogenated Styrene Methylstyrene Indene Copolymer is a synthetic polymer derived from styrene, methylstyrene, and indene monomers that have been hydrogenated to improve stability and reduce potential reactivity. It is primarily used in skincare and cosmetic formulations as a film-forming agent, thickener, and adhesive component, providing a non-sticky, flexible film on the skin or hair that enhances product texture and wear. This ingredient is commonly found in mascaras, lip products, and hair styling formulations where it contributes to hold, shine, and water resistance without compromising product spreadability.
Roles in Formulation
This ingredient serves the following purposes in cosmetic formulations:
Bulking Agent
Increases mass/volume to build structure and improve handling, commonly used to adjust feel, spread, and cost-in-use without acting as a primary active.
Binding
Provides cohesion by helping ingredients stick together, improving the strength and integrity of pressed powders, tablets, or solid bars.
Viscosity controlling agent
Adjusts thickness to the desired level for stability and usability, improving dispensing, suspension, and texture across many formulation types.
Film former
Creates a continuous film on skin or hair to improve wear, water resistance, transfer resistance, shine, or hold in sunscreens, makeup, and styling products.