A synthetic polyurethane based on polytetrahydrofuran, used as a film former.
What it is
Polyurethane-64 is, according to CosIng, a urethane copolymer made in several steps: isophorone diisocyanate is reacted with a mixture of polytetrahydrofurans (polybutylene glycols), the product is reacted with 4,4'-methylenebis(cyclohexylamine), and the remaining isocyanate groups are finally reacted with ethanol. CosIng lists it as a film-forming 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.
Functions
- Film forming
- Producing (upon application) a continuous film on the skin, hair or nails.
EU regulation
This ingredient is not listed in the annexes of Regulation (EC) No 1223/2009 in the CosIng data.