Chemical Structure Copolymer of Vinylpyrrolidone and vinylacetate
CTFA Nomenclature PVP/VA Copolymer
Physical properties exists as white or milky white powder,and colorless or slight yellow
transparent liquid. The clarity of the aqueous product depend on
the proportion of vinylpyrrolidone and vinylacetate. The aqueous
solution of VA37 is cloudy, and the others are clear at room
tempereture. The solution is slight acidic but not electrolytic.
Specification
|
Items |
VA73
(liquid) |
VA64
VA64S |
VA55
(liquid) |
VA37
(liquid) |
VA28
(liquid) |
| NVP/VA |
70/30 |
60/40 |
50/50 |
30/70 |
20/80 |
| K value |
24-32 |
26-34 |
22-28 |
25-31 |
16-22 |
| Vinylpyrrolidone % |
<0.2 |
<0.2 |
<0.1 |
<0.1 |
<0.1 |
| Moisture % |
<0.5 |
<0.5
<5.0 |
<0.5 |
<0.5 |
<0.5 |
| Solid % |
50+2 |
50+2
>95 |
50+2 |
50+2 |
50+2 |
| Lead mg/kg |
<40 |
<40 |
<40 |
<40 |
<40 |
| Mercury mg/kg |
<1 |
<1 |
<1 |
<1 |
<1 |
| Arsenic mg/kg |
<10 |
<10 |
<10 |
<10 |
<10 |
| Methane alcohol % |
<0.1 |
<0.1 |
<0.1 |
<0.1 |
<0.1 |
| PH (10% in water) |
6-8 |
6-8
5-7 |
6-8 |
6-8 |
6-8 |
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