Norm

ISO 6796:1981 en

Polyglycols for industrial use - Determination of hydroxyl number - Phthalic anhydride esterification method

31,57

Over deze norm

Status Definitief
Aantal pagina's 3
Gepubliceerd op 01-09-1981
Taal Engels
The hydroxy groups present in a test portion are esterified with phthalic anhydride. The excess phthalic anhydrids is hydrolyzed and the phthalic acid formed is neutralized with standard volumetric sodium hydroxide solution. If the sample contains free acidity or alkalinity a corresponding correction is made. From the corrected hydroxyl number, the apparat relative molecular mass may be calculated by a formula given.

Details

ICS-code 71.080.60
Nederlandse titel Polyglycols for industrial use - Determination of hydroxyl number - Phthalic anhydride esterification method
Engelse titel Polyglycols for industrial use - Determination of hydroxyl number - Phthalic anhydride esterification method

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