What Is Acrylates/Methoxy Peg-90 Methacrylate Crosspolymer?
Acrylates/Methoxy Peg-90 Methacrylate Crosspolymer is a synthetic polymer created by linking together acrylic acid derivatives with a methoxy-terminated polyethylene glycol chain. The result is a large, sponge-like molecule that forms a flexible film when spread on skin. Chemists began experimenting with these cross-linked acrylic polymers in the late 1980s as a way to improve the feel and staying power of creams and gels. By the early 2000s the ingredient had made its way into mainstream skincare thanks to its ability to protect the skin’s surface without a greasy after-feel.
Manufacturing starts with individual monomers such as methyl methacrylate, butyl methacrylate and methoxy PEG-90 methacrylate. Under carefully controlled heat, light or catalyst conditions those monomers join to create long chains. Cross-linking agents are then added so the chains attach to one another in a three-dimensional network that swells in water but stays put once it dries on the skin. The finished polymer is purified, dried into a fine powder and shipped to cosmetic labs.
You will most often spot Acrylates/Methoxy Peg-90 Methacrylate Crosspolymer in lightweight moisturizers, soothing masks, after-sun gels, tinted moisturizers and anti-aging serums. It is also popular in high-water formulas like sheet mask essences or watery lotions where formulators need an invisible shield that keeps moisture in and pollution out.
Acrylates/Methoxy Peg-90 Methacrylate Crosspolymer’s Cosmetic Benefits/Uses
This ingredient is prized for one primary role in skincare products.
Skin protecting: By forming a thin breathable film on the surface, the polymer helps lock in hydration and shields skin from airborne pollutants or irritants. The film is flexible so it moves with facial expressions, resists flaking and leaves a silky finish that can enhance the feel of other actives layered on top.
Who Can Use Acrylates/Methoxy Peg-90 Methacrylate Crosspolymer
Because it sits on the surface without clogging pores, this polymer is generally suitable for dry, normal, combination and oily skin. Its lightweight film rarely traps heat or oil so even acne-prone users tend to tolerate it well. People with highly reactive or acrylic-allergic skin should be cautious since any acrylate can trigger sensitivity in that small group.
The ingredient is completely synthetic with no animal-derived components, making it acceptable for vegans and vegetarians.
No reproductive or developmental warnings are associated with Acrylates/Methoxy Peg-90 Methacrylate Crosspolymer. Current safety data indicate it is fine for use during pregnancy or while breastfeeding, but this is not medical advice. Expectant or nursing mothers should review any skincare routine with their doctor to be safe.
The polymer does not absorb UV light or make skin more reactive to sunlight, so it is not considered photosensitizing. It is fragrance-free and non-comedogenic which further widens its compatibility with most routines.
Potential Side Effects/Adverse Reactions
Reactions to topical Acrylates/Methoxy Peg-90 Methacrylate Crosspolymer differ from person to person. The points below outline potential side effects that could occur, though most users will experience none if the product is well-formulated and used as intended.
- Transient redness or mild stinging
- Itching or tightness in very sensitive skin
- Contact dermatitis in individuals allergic to acrylic compounds
- Watery eyes or irritation if the product migrates too close to the lash line
- Rare clogging or buildup when layered with heavy occlusives on oily skin
If any of these effects occur stop using the product and consult a healthcare professional or dermatologist.
Comedogenic Rating
Rating: 1 out of 5. Acrylates/Methoxy Peg-90 Methacrylate Crosspolymer is a large water-swellable molecule that stays mainly on the skin’s surface rather than seeping into pores. It forms a breathable film that lets oil escape so it rarely traps sebum long enough to trigger blockages. The slight possibility of buildup comes from pairing it with heavy waxes or butters, which is why it earns a cautious 1 instead of a perfect 0. Overall it is considered suitable for skin that is prone to acne or breakouts.
The rating can shift if the finished formula is rich in occlusive oils, so always judge the full product rather than the single ingredient.
Summary
Acrylates/Methoxy Peg-90 Methacrylate Crosspolymer is a film-forming polymer that protects skin by locking in moisture and shielding against pollutants. It does this by creating a flexible mesh on the surface that is light smooth and non greasy. Its popularity has grown steadily since the early 2000s, especially in watery gels and masks where brands want a weightless protective feel.
Current safety data show it is well tolerated by most users with low risk of irritation or comedogenicity. As with any new skincare ingredient it is smart to patch test a product before full use to ensure personal compatibility.