Polyester-7
What is Polyester-7?
Polyester-7 is a synthetic polymer produced via esterification reactions involving polyols and dicarboxylic acids, resulting in a resin-like material. It serves primarily as a film-forming and hair-fixing agent in cosmetic products like hairsprays, mousses, gels, and some nail formulations. Upon application, it dries to create a sheer, elastic film on hair strands or nails, locking in styles with flexibility rather than rigidity. This mechanism enables hairstyles to withstand environmental factors such as humidity while permitting natural movement. The ingredient disperses readily in solvents typical of styling aerosols. Its non-tacky nature contributes to smooth application and finish. In formulations, concentrations align with functional needs for efficacy without excess residue. Overall, it supports styling performance in rinse-off or easily removable products.
Benefits
Provides flexible hold for hairstyles without stiffness
Helps resist humidity for lasting style integrity
Rinses off easily with shampoo for clean removal
Who It's For
A quick guide for who this ingredient may suit (and who should be cautious).
| Who May Benefit | Who Should Avoid |
|---|---|
| People styling hair daily for work or events | Those with rare sensitivities to synthetic polymers |
| Individuals with humidity-prone environments | People preferring entirely natural ingredient lists |
| Users seeking lightweight, non-greasy fixation | Individuals experiencing scalp irritation from styling products |
Safety Notes
- Low hazard rating from environmental health assessments
- Confirmed safe in cosmetic concentrations by expert reviews
Frequently Asked Questions about Polyester-7
What does Polyester-7 do in products?
It forms a flexible film for hair hold and style fixation in sprays and gels.
Is Polyester-7 safe for skin?
Safety data indicate low hazard and minimal irritation risk in cosmetics.
Does it clog pores?
Rated non-comedogenic, suitable for pore-friendly formulations.