High Purity polyvinylpyrrolidone pvp k30 pvp k90 cas 9003-39-8
Products Description
PVP (polyvinylpyrrolidone) is a water soluble polymer with film forming properties. It is widely used in medicine (e.g. plasma volume expander or contact lenses). The molecular weight is K-90 (111.14 g/mol)
BASIC ANALYSIS
Items | Specifications | Results |
Appearance | White or yellowish-white powder | White powder |
K value | 27-32 | 30.28 |
Moisture % | ≤5.0 | 3.23 |
PH value (5% in water) | 3-7 | 3.59 |
N-vinylpyrrolidone % | ≤0.1 | 0.023 |
Residue on ignition % | ≤0.1 | 0.05 |
Nitrogen % | 11.5-12.8 | 12.21 |
Heavy metals (as Pb) ppm | ≤10 | <10 |
Acetaldehyde % | ≤0.05 | <0.05 |
Hydrazine ppm | ≤1.0 | <1.0 |
Peroxide ppm | ≤400 | <400 |
Identification Test | A.B.C | Conform |
Benefits
PVP works as a film former, viscosity controller, emulsion stabilizer, binder, and a hair fixative in cosmetics and personal care products. It is the leading vinylpyrrolidone polymer to be used in cosmetics. PVP likes to adhere to surfaces like the skin and hair and creates a smooth, uniform film there. The film is helpful for maintaining a hairstyle and extending the use of sunscreen and colored cosmetics. The film is somewhat fragile due to PVP, which is hygroscopic and loves water, making it susceptible to destruction.
- Hair care: It prevents the hair from absorbing moisture when used in hair care products, which helps the hair maintain its style. However, due to its hygroscopic nature, hair styled with a PVP based product loses its style in high humidity. To fix this problem, there are now several versions of VP containing film formers that are less sensitive to humidity, for example, the molecule called VP/VA Copolymer. It is used at a concentration of 0.005-35% in leave-on products and at 0.000003-13.3% in rinse-off products
What does PVP do in a formulation?
- Emulsion stabilising
- Film forming
- Hair fixing
- Viscosity controlling