Phthalic Anhydride/Trimellitic Anhydride/Glycols Copolymer

What is Phthalic Anhydride/Trimellitic Anhydride/Glycols Copolymer?

Phthalic Anhydride/Trimellitic Anhydride/Glycols Copolymer is a synthetic resin produced through the condensation reaction of phthalic anhydride, trimellitic anhydride, and various glycols such as neopentyl glycol. Primarily used in nail care products like polishes and coatings, it belongs to the category of polymer film-formers. In formulations, it creates a continuous, adherent layer on nails or hair that enhances durability, flexibility, and resistance to water or wear. Additionally, it modifies the product's thickness, ensuring smooth application, even distribution, and stability without separation. This ingredient supports long-lasting cosmetic effects in decorative and styling applications.

Comedogenic Rating 0/5 Low risk of clogging pores
EWG Safety Rating 1 View on EWG →

Roles in Formulation

This ingredient serves the following purposes in cosmetic formulations:

Film former
Creates a continuous film on skin or hair to improve wear, water resistance, transfer resistance, shine, or hold in sunscreens, makeup, and styling products.
Viscosity controlling agent
Adjusts thickness to the desired level for stability and usability, improving dispensing, suspension, and texture across many formulation types.

Benefits

Forms a strong yet flexible film to improve product adherence and wear time.

Adjusts viscosity for smoother application and enhanced product stability.

Non-comedogenic, minimizing pore-clogging potential on skin.

Who It's For

A quick guide for who this ingredient may suit (and who should be cautious).

Who May Benefit Who Should Avoid
Users of nail polishes seeking chip-resistant, long-wear finishes.
Those with rare allergies to synthetic polymers or anhydrides.
Individuals applying hair styling products for better hold and texture.
Individuals sensitive to resin-based ingredients in cosmetics.
People with normal skin looking for stable, easy-to-use formulations.
People preferring entirely natural or plant-derived product components.

Safety Notes

  • Considered safe for cosmetic use in reviewed concentrations by regulatory panels.
  • Low potential for comedogenicity or pore-clogging effects.

Frequently Asked Questions about Phthalic Anhydride/Trimellitic Anhydride/Glycols Copolymer

What is Phthalic Anhydride/Trimellitic Anhydride/Glycols Copolymer?

A synthetic polymer made from anhydrides and glycols, used to form films and control thickness in nail and hair products.

Is it safe for skin?

Regulatory reviews indicate it poses low safety concerns in cosmetic formulations.

Does it clog pores?

Rated non-comedogenic, with no evidence of pore-clogging.