ISO 4656:2007

Rubber compounding ingredients — Carbon black — Determination of oil absorption number (OAN) and oil absorption number of compressed sample (COAN)

Publication date:   May 9, 2007

95.99 Withdrawal of Standard   Jul 9, 2012

General information

95.99 Withdrawal of Standard   Jul 9, 2012

ISO

ISO/TC 45/SC 3 Raw materials (including latex) for use in the rubber industry

International Standard

83.040.20   Rubber compounding ingredients

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Scope

Oil absorption number (OAN) is a measure of the ability of a carbon black to absorb liquids. This property is a function of the structure of the carbon black. Either dibutyl phthalate (DBP) or paraffin oil is acceptable for use with standard pelleted grades, including N-series carbon blacks found in ASTM D 1765, although OAN testing using paraffin oil on some speciality blacks and powder blacks may result in unacceptable differences as compared to OAN testing using DBP oil. While studies have shown the two oils to give comparable precision, paraffin oil offers the advantage of being non-hazardous.
ISO 4656:2007 specifies a method using an absorptometer for the determination of the oil absorption number of carbon black for use in the rubber industry.
The same method is used for the determination of the oil absorption number of compressed samples of carbon black. The procedure for the preparation of the compressed samples is described in the standard.

Life cycle

PREVIOUSLY

Revises
ISO 4656-1:1992

Revises
ISO 4656-2:1991

Revises
ISO 6894:1991

NOW

WITHDRAWN
ISO 4656:2007
95.99 Withdrawal of Standard
Jul 9, 2012

CORRIGENDA / AMENDMENTS

Amended by
ISO 4656:2007/DAmd 1

REVISED BY

PUBLISHED
ISO 4656:2012