A synthetic polyester of adipic acid and neopentyl glycol, used as a film former.
What it is
Polyester-8 is, according to CosIng, a copolymer of adipic acid and neopentyl glycol whose chain ends are capped either with octyldodecanol or with a cyanodiphenylpropenoyl group, the group that also forms the core of the UV filter octocrylene. CosIng lists it as a film-forming and skin-conditioning ingredient.
Where it is used
Appears on the ingredient lists of a small number of products.
Limits of interpretation
The INCI list shows which ingredients are present, not how much of each. Above 1%, ingredients are listed in descending order of weight; below 1% the order is free.
The INCI name does not show the molecular weight or the proportion of each end group.
Functions
- Film forming
- Producing (upon application) a continuous film on the skin, hair or nails.
- Skin conditioning
- Maintaining the skin in good condition.
EU regulation
This ingredient is not listed in the annexes of Regulation (EC) No 1223/2009 in the CosIng data.