|
Product Name:Copolymer of Vinylpyrrolidone with Vinyl Acetate
INCI Name:VP/VA Copolymer
Pharmacopeia Name:Copovidone
CAS NO.:25086-89-9
*Cosmetic Grade VP/VA Copolymers with different rations of N-Vinylpyrrolidone to Vinyl Acetate,soluble in most organic solvents.Which exists in powder,water solution and ethnol solution form. VP/VA Copolymers’ aqueous solutions are non-ionic, neutralization not required, Resultant films are hard, glossy, and water-removable; Tunable viscosity, softening point and water sensitivity depending on VP/VA ratio; Good compatibility with many modifiers, plasticizers, spray propellants and other cosmetic ingredients,and the hydroscopicity decreases in proportion to the ration of Vinyl acetate.
Key Technical Parameters:
|
Product
|
PVP/VA 64 Powder
|
PVP/VA 64W
|
PVP/VA 73W
|
| Appearance |
White to creamy white,free-flowing powder |
Transparent to slight yellowish liquid |
| VP/VA |
60/40 |
60/40 |
70/30 |
| K Value |
27-35 |
27~35 |
27~35 |
| Monomers |
0.1% max. |
0.1% max. |
0.1% max. |
| Water |
5.0% max. |
48~52% |
48~51% |
| Solid Content |
95% max. |
48~51% |
48~52% |
| Sulphated Ash |
0.1% max. |
0.1% max. |
0.1% max. |
| pH Value(10% in water) |
4.0~7.0 |
4.0~7.0 |
4.0~7.0 |
Applications:
VP/VA Copolymers are the excellent choice as film forming agent and hair-styling agent,which are suitable for fourmulations which used as film forming and viscosity modification,especially in hair styling products, such as Hair Gels,Aerosol gas sprays,Wet look sprays.
************************************************
*Pharmaceutical Grade VP/VA Copolymer-Copovidone with 60/40 ration of N-Vinylpyrrolidone to Vinyl Acetate,soluble in most organic solvents.Which exists in powder,Copovidone forms hard,water-removable and glossy films,it has excellent compatibility with many plasticizers and modifiers. Good solubility in water,alcohol and other organic solvents.
Key Technical Parameters:
|
Appearance
|
White or yellowish-white powder or flakes,hygroscopic
|
|
Viscosity(Express as K Value)
|
25.20~30.24
|
|
Solubility
|
Freely soluble in water,in alcohol and in methylene chloride
|
|
Identifications
|
A.Infrared Absorption
|
|
B.A red colour appears
|
|
C.A violet colour appears
|
|
Peroxides(Expressed as H2O2)
|
400 ppm max.
|
|
Hydrazine
|
1 ppm max.
|
|
Monomers(VP+VA)
|
0.1% max.
|
|
Impurity A(2-Pyrrolidone)
|
0.5% max.
|
|
Heavy Metals(as Pb)
|
20 ppm max.
|
|
Loss on Drying
|
5.0% max.
|
|
Sulphated Ash
|
0.1% max.
|
|
Ethenyl Acetate Content
|
35.3~42.0% max.
|
|
Nitrogen Content
|
7.0~8.0 %
|
Applications:
Copovidone mainly used as water-soluble binder and dry binder in wet/direct granulation processes,also it can be used as film forming materials.
*Water soluble tablet binder,suitable for wet or dry granulation/direct compression processes.
*Film Former:permeable film coating for tablet and sugar coatings to protect against splitting,decrease moisture sensitivity and provide good film adhesion.
***********************************************
*Technical Grade VP/VA Copolymers are with different rations of vinylpyrrolidone to vinyl acetate and available as white powder or clear transparent solutions in water,ethanol and isopropanol.It’s forms hard,glossy,flexible,water-removable,oxygen permeable films which adhere to glass,plastics and metals,these properties,coupled with the ability to control their hydrophilicity through monomer composition,lead to extensive its industrial application.
Key Technical Parameters:
|
