PVA
Polyvinyl alcohol is produced by the polymerization of vinyl acet ate. Then, polyvinyl ace tate was saponified under the action of different alkali amounts to obtain polyvinyl alcohols having different degrees of alcoholysis. Cold-soluble polyvinyl alcohol powder is made by partially cold-milling polyvinyl alcohol by cryogenic milling. It is a water-soluble, environmentally friendly white solid powder.
|
Model
|
Size(mesh)
|
Viscosity(cps)
|
Alcoholysis
(mol e%)
|
Ash(%)max
|
Volatile(%)max
|
|
0588
|
120
|
4.6-5.4
|
87-89
|
0.7
|
5.0
|
|
1788
|
120
|
20.5-24.5
|
87-89
|
0.7
|
5.0
|
|
2488
|
120
|
40-48
|
87-89
|
0.7
|
5.0
|
