ISO 4656:2012
Current
The latest, up-to-date edition.
Rubber compounding ingredients — Carbon black — Determination of oil absorption number (OAN) and oil absorption number of compressed sample (COAN)
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09-07-2012
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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 D1765, although OAN testing using paraffin oil on some speciality blacks and powder blacks might 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 4656:2012 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 an annex.
| DevelopmentNote |
Supersedes ISO 4656-1, ISO 4656-2 and ISO 6894. (05/2007) Supersedes ISO/DIS 4656. (07/2012)
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| DocumentType |
Standard
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| Pages |
18
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| PublisherName |
International Organization for Standardization
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| Status |
Current
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| Supersedes |
| Standards | Relationship |
| UNE-ISO 4656:2013 | Identical |
| GOST ISO 4656 : 2013 | Identical |
| NF ISO 4656 : 2012 | Identical |
| NEN ISO 4656 : 2012 | Identical |
| BS ISO 4656:2012 | Identical |
| UNI ISO 4656 : 2008 | Identical |
| DIN 55968:2013-08 | PIGMENTS - INDUSTRIAL CARBON BLACKS (LAMP BLACK, FURNACE BLACK, GAS BLACK) - REQUIREMENTS AND METHODS OF TEST |
| ISO 1126:2015 | Rubber compounding ingredients Carbon black Determination of loss on heating |
| ISO/TR 9272:2005 | Rubber and rubber products Determination of precision for test method standards |
| ASTM D 4821 : 2016 : REDLINE | Standard Guide for Carbon Black—Validation of Test Method Precision and Bias |
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