NF ISO 4656

NF ISO 4656

December 2012
Standard Current

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

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.

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Collections

National standards and national normative documents

Publication date

December 2012

Number of pages

22 p.

Reference

NF ISO 4656

ICS Codes

83.040.20   Rubber compounding ingredients

Classification index

T45-122

Print number

1 - 28/11/2012

International kinship

ISO 4656:2012
Sumary
Rubber compounding ingredients - Carbon black - Determination of oil absorption number (OAN) and oil absorption number of compressed sample (COAN)

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.

Replaced standards (1)
NF ISO 4656
September 2007
Standard Cancelled
Rubber compounding ingredients - Carbon black - Determination of oil absorption number (OAN) and oil absorption number of compressed sample (COAN)

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.

Table of contents
  • Avant-propos
    iv
  • 1 Domaine d'application
    1
  • 2 Références normatives
    1
  • 3 Principe
    1
  • 4 Réactifs
    2
  • 5 Appareillage
    2
  • 6 Préparation de l'échantillon
    3
  • 7 Conditions d'essai
    3
  • 8 Mode opératoire
    3
  • 8.1 Vérification de l'absorptiomètre et de la burette à débit constant
    3
  • 8.2 Étalonnage et normalisation de l'absorptiomètre
    3
  • 8.3 Prise d'essai
    4
  • 8.4 Dosage
    5
  • 9 Expression des résultats
    5
  • 10 Fidélité et biais
    6
  • 11 Rapport d'essai
    6
  • Annexe A (normative) Préparation des prises d'essai comprimées
    7
  • Annexe B (normative) Vérification et réglage du ressort et de l'amortisseur hydraulique
    12
  • Annexe C (normative) Vérification de la burette à débit constant
    14
  • Annexe D (informative) Fidélité et biais
    16
  • Bibliographie
    18
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