What it is
Polyacrylate refers to polymers and their salts derived from acrylic acid (CH2=CHCO2H) or its esters. In cosmetics, these high-molecular-weight synthetic polymers act primarily as rheology modifiers and film formers. They work by swelling in aqueous systems to build viscosity, giving products like serums, gels, and lotions their characteristic texture and spreadability. Their large molecular size generally prevents skin penetration, which contributes to their favorable tolerability profile. The INCI name 'Polyacrylate' covers the base polymer class; many specific numbered variants (Polyacrylate-1 through -14 and crosspolymers) are also in use, each with tailored properties for different formulation types.
Safety & warnings
Polyacrylates have large molecular sizes that are not expected to penetrate intact skin, supporting their general tolerability. Residual monomer (acrylic acid) from manufacturing can be a minor irritant; reputable suppliers control residual levels. The CIR Expert Panel concluded that acrylates copolymers are safe in cosmetics when formulated to be non-irritating. EWG Skin Deep rates various numbered polyacrylate variants differently; some (e.g., Polyacrylate-2, -7, -13, -14) are restricted for EWG VERIFIED products pending further substantiation, while Polyacrylate-1 and -3 carry no restriction. No significant sensitization or comedogenic concerns are associated with high-molecular-weight polyacrylates in typical use concentrations.
Origin & sourcing
Polyacrylates are fully synthetic polymers manufactured by free-radical polymerization of acrylic acid or acrylic acid esters derived from petrochemical feedstocks. Acrylic acid is typically produced by catalytic oxidation of propylene, a petroleum derivative. The resulting monomers are polymerized under controlled conditions to yield polymers of specific molecular weight and architecture.
History
The first synthesis of acrylic polymers was reported by G. W. A. Kahlbaum in 1880. Commercial development expanded through the mid-20th century, with companies such as Dow Chemical, Hercules, and DuPont introducing acrylic polymer products. Super-absorbent polyacrylates were developed by the USDA in the early 1960s for soil water conservation before being adopted broadly in personal care. The CIR Expert Panel has assessed acrylate copolymers and concluded that 126 related acrylates copolymers are safe in cosmetics when formulated to be non-irritating.
Questions everyone asks
What does Polyacrylate do in a cosmetic product?
Polyacrylate functions mainly as a thickener and rheology modifier. It swells in water to create a gel network that gives creams, serums, and gels their smooth, flowing consistency and helps stabilize emulsions.
Is Polyacrylate safe for sensitive skin?
High-molecular-weight polyacrylates are generally well tolerated because their large polymer chains cannot penetrate skin. The CIR Expert Panel has found acrylates copolymers safe when formulated to be non-irritating; however, individuals with known acrylic acid sensitivity should exercise caution.
Is Polyacrylate natural or synthetic?
Polyacrylate is a fully synthetic polymer derived from petrochemical-sourced acrylic acid. It is not naturally occurring and has no botanical or mineral equivalent.
How does Polyacrylate differ from Carbomer?
Both are acrylic acid-based polymers used to thicken cosmetics. Carbomer (poly(acrylic acid)) is a specific cross-linked form, while Polyacrylate is the broader INCI class that may refer to linear or branched homo- or co-polymers of acrylic acid esters, often with different solubility and texture pr