A synthetic copolymer used in hair products as a film former and fixative.
What it is
Sodium laneth-40 maleate/styrene sulfonate copolymer is a copolymer of sodium laneth-40 maleate and styrene sulfonate monomers. Laneth-40 is a polyethylene glycol ether of lanolin alcohol, which is derived from the wool wax of sheep. CosIng lists it as a film-forming, hair-fixing and hair waving or straightening ingredient.
Where it is used
Found in a small number of hair products, such as styling products and products for waving or straightening hair.
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
- Film forming
- Producing (upon application) a continuous film on the skin, hair or nails.
- Hair fixing
- Permitting physical control of hair style.
- Hair waving or straightening
- Modifying the chemical structure of the hair, allowing it to be set in the style required (permanent waves or hair straightening).
EU regulation
This ingredient is not listed in the annexes of Regulation (EC) No 1223/2009 in the CosIng data.