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poly(vinyl alcohol) or poly vinyl alcohol bp grade
ph eur
poly(vinyl alcohol) is obtained by polymerisation of vinyl acetate, followed by partial or almost complete hydrolysis of poly(vinyl acetate) in the presence of catalytic amounts of alkali or mineral acids.
poly(vinyl alcohol) polymers comply with the following indices:
the mean relative molecular mass lies between 20 000 and 150 000. The viscosity is 3 to 70
mpas. The ester value which characterises the degree of hydrolysis is not greater than 280.
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