Polyester-8

Polyester-8 (trade name Polycrylene®) is a cosmetic-grade polymer that improves sunscreen performance by enhancing photostability and substantivity. It works synergistically with Diethylhexyl 2,6-Naphthalate to photostabilize Avobenzone via a triplet quenching mechanism. It also works synergistically with other polymeric film formers to improve wash-off resistance.

Polyester-8 is particularly useful in sun protection formulations that are designed to meet the highest Japanese standard of UVA protection, PA+++. It is added to the oil phase where it is mutually soluble with the most commonly used ingredients and is easily emulsified.  In a clinical study of 50 people, Polyester-8 was non-irritating and non-sensitizing. A HET-CAM study determined that Polycrylene® has only a slight potential for ocular irritation.

Functions
Photostabilizer
Emollient
Film-forming agent
Skin conditioning
Synonyms
Polycrylene®

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