A synthetic hydrocarbon resin made from styrene and methylstyrene, listed as a binder and depilatory ingredient.
What it is
Styrene/methylstyrene copolymer is a synthetic copolymer of styrene (ethenylbenzene) and alpha-methylstyrene. CosIng lists it as a binding and depilatory ingredient.
Where it is used
Appears on the ingredient lists of a small number of products, such as hair removal 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 ratio of the monomers.
Functions
- Binding
- Providing adhesive properties during and after compression in cosmetic tablets and/or cakes.
- Depilatory
- Breaking down the the mechanical strength of hair fibers so that they can be removed by mild scraping/rubbing.
EU regulation
This ingredient is not listed in the annexes of Regulation (EC) No 1223/2009 in the CosIng data.