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 PVP-A
Copolymer Series |
| CTFA Nomenclature : |
PVP/VAc copolymer |
| CAS Number : |
25086-89-9 |
| Chemical Structure:
|
| Copolymer of vinylpyrrolidone
with vinylacetate |
 |
|
Physical Properties:
|
Copolymer of different proportion of
vinylpyrrlidone to vinyl acetate can be offered in
powder or alcohol solution product. The aqueous product
could be cloudy. The clarity of the solution depends
on the proportion of vinylpyrrolidone to vinyl acetate.
The solution is slight acidic but not electrolytic. |
| |
| Specification: |
Technical Grade
Product
|
VP/VAc
(w/w)
|
K value |
Vinylpyr
rolidone % |
Moisture
% |
Solide
% |
| VA73E |
70/30 |
30-38 |
<0.2 |
<0.5 |
>95 |
| VA64E |
60/40 |
30-36 |
<0.2 |
<0.5 |
30±1 |
VA64(Powder)
|
60/40 |
26-34 |
<0.2 |
<5.0 |
--- |
| VA55E |
50/50 |
28-36 |
<0.2 |
<0.5 |
20±1 |
| VA37E |
30/70 |
28-36 |
<0.2 |
<0.5 |
20±1 |
Pharmaceutical Grade
|
Specification
|
Grade
|
K Value
|
Saponification value
|
Monomers( VP+VAc
),%
|
Loss on drying,%
|
Sulphated ash,%
|
|
VA64 Powder
|
EP3.0
|
25.2 -30.8
|
230 -274
|
<0.4
|
<5.0
|
<0.1
|
|
Heavy metals , ppm
|
Nitrogen,%
|
Aldehydes,ppm
|
Peroxides,ppm
|
Hydrazine,ppm
|
2-pyrrolidone,%
|
---
|
|
<20ppm
|
7.0-8.0
|
<500
|
<400
|
<1
|
<0.5
|
---
|
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|
| Application: |
| Cosmetics: |
PVP/VAc series products play a good
role as film-former and hair-fixing agent. Its hydrophobe
decreases with the increase in the proportion of vinyl
acetate in the molecular. This property is extremely
useful for PVP/VAc as hair sprays and hairset lotion.
If being used with PVPK30, the effect would be enhanced. |
| Other Utility: |
♦
|
Remoistenable adhesive and other
adhesives for paper. |
| ♦ |
Viscosity-enhancing agent and protecting colloid
for printing ink |
| ♦ |
Binder in coatings(paints) and protecting
colloid for printing ink |
| ♦ |
Binder in coatings(paints) and stabilizer
for the dispersion of dyeing. |
| ♦ |
Film coatings agent in pharmaceutical Industry
|
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