What Is Polyacrylate-31?
Polyacrylate-31 is a synthetic polymer made from acrylic acid units that have been linked together to form a long flexible chain. Created in the lab rather than sourced from plants or animals, it belongs to the family of polyacrylates that have been used in cosmetics since the late 1970s when chemists first discovered their strong film-forming ability. Production starts with acrylic acid monomers that are mixed with a catalyst and water in a controlled reactor. Heat or ultraviolet light triggers the monomers to join into a clear viscous gel. After purification and drying the material is milled into a fine powder or kept as a concentrated solution, ready to be blended into cosmetic formulas.
Because Polyacrylate-31 forms an invisible flexible film on surfaces it is mainly found in styling gels, sprays and mousses aimed at holding hairstyles in place. It can also show up in brow gels, edge controllers and certain leave-in treatments where lasting hold is needed without stiffness.
Polyacrylate-31’s Cosmetic Benefits/Uses
This ingredient contributes a single yet valuable benefit to beauty products.
As a hair fixing agent Polyacrylate-31 coats each strand with a lightweight film that sets when dry. This film helps keep curls defined, smooths flyaways and locks a chosen style in place until the next wash. The result is reliable hold with a touchable feel and minimal flaking even in humid conditions.
Who Can Use Polyacrylate-31
Because Polyacrylate-31 is an inert film-forming polymer with no active medicinal properties it tends to agree with all skin and scalp types, including dry, oily, combination and even sensitive skin that reacts easily to fragrance or essential oils. The molecule is too large to penetrate pores, so it is not known to clog them or trigger breakouts.
The ingredient is synthesized in a laboratory from petroleum-derived acrylic acid with no animal inputs, making it suitable for both vegans and vegetarians.
Current cosmetic safety assessments consider Polyacrylate-31 non-toxic and non-teratogenic, so products containing it are generally viewed as safe during pregnancy and while breastfeeding. That said this is not medical advice; anyone who is pregnant or nursing should run their haircare routine past a qualified doctor just to be sure.
Polyacrylate-31 does not absorb UV light or interfere with normal skin functions so it is not linked to photosensitivity. It also plays well with other common styling ingredients, and no noteworthy age, gender or hair texture limitations have been reported.
Potential Side Effects/Adverse Reactions
Reactions to topical Polyacrylate-31 vary from person to person. The points below list potential side effects that may occur even though they are uncommon in products that are formulated and used correctly.
- Mild scalp or skin irritation presenting as redness, itching or a stinging sensation
- Allergic contact dermatitis in individuals already sensitized to acrylate compounds
- Flaking or visible residue if excessive product is applied or not rinsed out completely
- Product buildup that can leave hair feeling heavy or dull over time if clarifying shampoos are never used
If you experience any of these issues discontinue use and consult a medical professional or licensed dermatologist for guidance.
Comedogenic Rating
Rating: 0 / 5
Polyacrylate-31 is a very large molecule that sits on the surface of hair and skin without seeping into pores so it does not block follicles or encourage blackheads. It is water dispersible and rinses away easily with regular cleansing which further limits any chance of pore congestion. For that reason it scores a zero on the comedogenic scale.
Suitable for people who are prone to acne or breakouts.
If styling products containing Polyacrylate-31 are layered heavily every day, buildup mixed with oil or dust could create a dirty surface feel. Using a clarifying shampoo once in a while prevents this side concern.
Summary
Polyacrylate-31 is used mainly as a hair fixing agent. It forms a clear flexible film around each strand, locking styles in place, defining curls and smoothing flyaways while resisting humidity.
The polymer shows up often in gels, mousses and sprays although it is not as widely talked about as more glamorous ingredients. Stylists value it for dependable hold that avoids crunch and flaking.
Current safety reviews label Polyacrylate-31 non toxic, non irritating and non comedogenic so it is considered low risk for everyday use. As with any new product it is smart to patch test first to make sure your unique skin or scalp agrees with the formula.