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ISO 7781:2017

Styrene-butadiene rubber, raw — Determination of soap and organic-acid content

Nov 16, 2017

General information

90.93     Jul 1, 2022

ISO

ISO/TC 45/SC 3

International Standard

83.040.10  

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Scope

ISO 7781:2017 specifies three methods for the determination of the soap and organic-acid content of raw styrene-butadiene rubber (SBR).
- Method A is the titration method using indicator reagent.
- Method B is the titration method using an automatic potentiometric titrator.
- Method C is the back titration method using an automatic potentiometric titrator.
Since the soaps and organic acids present in the rubber are not single chemical compounds, the method gives only an approximate value for the soap and organic-acid content.

Life cycle

PREVIOUSLY

WITHDRAWN
ISO 7781:2008

NOW

PUBLISHED
ISO 7781:2017
90.93 Standard confirmed
Jul 1, 2022