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| Elvanol 71-30 |
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Elvanol 71-30 is a medium viscosity, fully hydrolyzed grade of polyvinyl alcohol.
White and granular, it is soluble in hot water but insoluble in cold water and common organic solvents.
For many applications Elvanol 71-30 is prepared in water solutions.
On evaporation of water, transparent films are formed which have high tensile strength and tear resistance.
The binder characteristics of Elvanol offer excellent adhesion to porous, water-absorbent surfaces. |
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Form: granular
Color: white
Hydrolysis, mole %a: 99.0-99.8
Saponification numberb: 3-12
Residual polyvinyl acetate, weight %: 0.5-1.8
Viscosity, mPa¡¤s (cP)c: 27-33
Solution pH: 5.0-7.0
Volatiles, % max :5
Ash (as Na2O), % maxa: 1.0
Bulk density, kg/m3 (lb/ft3): 400-432 (25-27)
Specific gravity: 1.30 |
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