What Is Polyacrylate-35?
Polyacrylate-35 is a man-made polymer created by reacting dipentaerythrityl pentaacrylate with a cyclic trimer of hexamethylene diisocyanate. This reaction links many small acrylate units into long chains, forming a clear flexible material that behaves like a lightweight plastic. Because the starting chemicals are produced in a laboratory, Polyacrylate-35 is considered a fully synthetic ingredient.
The polymer first appeared in nail care labs in the early 2000s when formulators were searching for alternatives to older resins that could crack or yellow. Polyacrylate-35 offered a tougher yet more elastic film, so it quickly found a home in nail lacquers and strengtheners. Over time it has also been adopted in hybrid gels and long-wear top coats because it helps polishes last longer without chipping.
Manufacturing begins with purified monomers that are blended under controlled temperature and pH. A catalyst starts the chain-building process, linking the acrylate groups while the diisocyanate trimer acts as a cross-bridge. Once the reaction reaches the desired molecular weight, the mixture is cooled, neutralized and filtered. The finished polymer is supplied as a viscous liquid or dry flakes that dissolve easily in the solvents used for nail products.
You will mainly find Polyacrylate-35 in nail polishes, base coats, top coats, strengtheners, cuticle oils and some nail treatment pens aimed at improving durability and gloss. It is rarely used in skin creams or hair products because its benefits are specific to hard surfaces like the nail plate.
Polyacrylate-35’s Cosmetic Benefits/Uses
This ingredient is added to formulas for one key reason that makes a noticeable difference in nail care.
As a nail conditioning agent Polyacrylate-35 forms a thin flexible film over the nail surface. The film locks in moisture, smooths ridges, adds shine and boosts the overall strength of the coating. By improving adhesion between the color layer and the nail, it helps polish resist chips and peeling so manicures stay fresh for several extra days.
Who Can Use Polyacrylate-35
Polyacrylate-35 is considered non-comedogenic and non-sensitizing for the vast majority of users, so it suits all skin types including dry, oily and sensitive. Because it stays on the nail plate rather than penetrating living skin, it rarely aggravates conditions such as eczema or psoriasis around the hands. People with a known acrylic or isocyanate allergy, however, should steer clear since trace residuals from manufacturing could trigger a reaction.
The polymer is synthesized entirely from laboratory materials with no animal-derived components which makes it acceptable for vegans and vegetarians. No animal testing is required for its approval in most regions, though policies differ by country and brand.
Current safety data indicate that Polyacrylate-35 poses no specific risks to pregnant or breastfeeding women when used in typical nail products. Nonetheless this is not medical advice and anyone who is pregnant or nursing should review any cosmetic routine with a qualified healthcare professional to be certain it aligns with personal health needs.
The ingredient does not absorb ultraviolet light so it does not cause photosensitivity. It also will not interfere with self-tanners or UV-curing gel lamps commonly used in salons.
Potential Side Effects/Adverse Reactions
Side effects from topical use of Polyacrylate-35 vary between individuals. The points below outline potential issues but most people will not experience them when the ingredient is used correctly in a well-formulated product.
- Mild skin irritation around the cuticle area
- Allergic contact dermatitis in those sensitive to acrylates or isocyanates
- Nail surface dryness or brittleness if overused with strong solvents
- Temporary eye or throat irritation from inhaling vapors during application in poorly ventilated spaces
- Discoloration or yellowing of the nail plate when layered with incompatible pigments
If any uncomfortable reaction occurs stop using the product immediately and consult a healthcare professional for guidance.
Comedogenic Rating
Rating: 0/5. Polyacrylate-35 is a large polymer that sits on the surface of the nail plate and is not designed to penetrate skin or enter pores. Because it is chemically inert toward sebum and lacks oily or waxy residues it does not clog follicles, so it earns the lowest possible comedogenic score.
That makes Polyacrylate-35 fully suitable for people who are prone to acne or breakouts. Even if a small amount touches facial skin while applying polish it is unlikely to contribute to blemishes.
Its comedogenic potential remains negligible across different formulations, whether found in regular lacquer, gel hybrids or treatment pens.
Summary
Polyacrylate-35 is primarily used as a nail conditioning polymer that forms a clear flexible film over the nail. This film smooths ridges, locks in moisture, boosts shine and improves the bond between color layers and the nail surface, leading to longer lasting manicures with fewer chips.
While not a household name in broader skincare, the ingredient enjoys steady popularity in professional and at-home nail products where durability is a selling point. Outside of nail care it sees little demand because its benefits are specific to hard surfaces rather than skin or hair.
Current safety data rate Polyacrylate-35 as low risk with minimal irritation potential for the average user. Allergic reactions are rare and usually linked to existing acrylate sensitivity. As with any new cosmetic, it is wise to patch test a product containing this polymer before full use to ensure personal compatibility.