Polyvinyl alcohol

1.PVA 2499 White Flake
2.High Quality
3.Competitive Price
4.Direct Manufacturers
5.Timely Delivery
Polyvinyl alcohol(PVA)
1,Chemicals and physicals properties
Other name
vinylalcohol polymer,poval
CAS No.
9002-89-5
Molecular formula
[C2H4O]n
Appearance
white flakes,floccus or powder solid,odourless
Relative density(25°C/4°C)
1.27-1.31(solid), 1.02(10% solution)
Glass state temperature
75-85°C
Refractive index
1.49-1.52
Thermal conductivity
0.2w/(m·K)
Specific heat
1-5kJ/(kg·K)
Resistivity
(3.1~3. 8)×10Ω·cm
Ignition temperature(°C)
410(powder)
Lower explosive limit(V/V)
125(g/m3 )

2,Specifications
PVA17-88
ITEM
FIRST GRADE
QUALIFIED GRADE
Hydrolysis,% (mol/mol)
87-89
86-90
Viscosity,mPa·s
21-25
20-26
volatile,%
5.0max
7.0max
PH value
5-7
5-7
Ash,%
0.5max
0.7max
Purity,%
93.5
91.5min

3,Applications
1)adhesive and lamination agents
2)sizing and coating for textiles and paper
3)emulsifying agent in waxes
4)cosmetic
5)stencil screens;ceramic binders
6)fabric and rubberlike products
7)protective films for metal,plastic,cloth
8)printer inks for glass and plastics
9)flexible fuel line ...etc