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SRPS ISO 7781:2019

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

Jan 31, 2019

General information

90.93     Jul 1, 2022

90.20    Jul 15, 2027

ISS

G045

International Standard

83.040.10  

English  

Van Plana 2018

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Published

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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WITHDRAWN
SRPS ISO 7781:2014

NOW

PUBLISHED
SRPS ISO 7781:2019
90.93 Standard confirmed
Jul 1, 2022

Related project

Adopted from ISO 7781:2017