Standard Test Method for Carbon Black-Oil Absorption Number (OAN)

SIGNIFICANCE AND USE
The oil absorption number of a carbon black is related to the processing and vulcanizate properties of rubber compounds containing the carbon black.
SCOPE
1.1 This test method covers the determination of the oil absorption number of carbon black.
1.2 The values stated in SI units are to be regarded as the standard. The values given in parentheses are for information only.
This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.

General Information

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Publication Date
30-Sep-2006
Technical Committee
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Standards Content (Sample)

NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
Contact ASTM International (www.astm.org) for the latest information
e1
Designation:D2414–06a
Standard Test Method for
1
Carbon Black—Oil Absorption Number (OAN)
This standard is issued under the fixed designation D2414; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision.Anumber in parentheses indicates the year of last reapproval.A
superscript epsilon (e) indicates an editorial change since the last revision or reapproval.
This standard has been approved for use by agencies of the Department of Defense.
1
e NOTE—Footnote 4 revised editorially in October 2007.
1. Scope viscosity. This increased viscosity is transmitted to the torque-
sensingsystemoftheabsorptometer.Whentheviscosityofthe
1.1 This test method covers the determination of the oil
mixture reaches a predetermined torque level, the absorptom-
absorption number of carbon black.
eter and buret will shut off simultaneously. The volume of oil
1.2 The values stated in SI units are to be regarded as the
added is read from the direct-reading buret. The volume of oil
standard. The values given in parentheses are for information
per unit mass of carbon black is the oil absorption number.
only.
3.2 Either DBP or paraffin oil is acceptable for use with
1.3 This standard does not purport to address all of the
standard pelleted grades including N-series carbon blacks
safety concerns, if any, associated with its use. It is the
found in Classification D1765. OAN testing using paraffin oil
responsibility of the user of this standard to establish appro-
on some specialty blacks and powder blacks may result in
priate safety and health practices and determine the applica-
unacceptable differences as compared to OAN testing using
bility of regulatory limitations prior to use.
DBP oil. While studies have shown either oil to exhibit
2. Referenced Documents
comparableprecision,paraffinoilofferstheadvantageofbeing
2
non-hazardous; even FDA-approved grades are available. For
2.1 ASTM Standards:
either oil, Sections 8-11 (Calibration, Procedure, Calculation,
D1765 Classification System for Carbon Blacks Used in
and Report) are to be consistent with the oil selected for use.
Rubber Products
RefereetestingbetweensuppliersandusersshoulduseDBPoil
D1799 Practice for Carbon Black—Sampling Packaged
untilsuchtimethatprecisiondataareavailableforparaffinoil.
Shipments
D1900 Practice for Carbon Black—Sampling Bulk Ship-
4. Significance and Use
ments
4.1 Theoilabsorptionnumberofacarbonblackisrelatedto
D4483 Practice for Evaluating Precision for Test Method
theprocessingandvulcanizatepropertiesofrubbercompounds
Standards in the Rubber and Carbon Black Manufacturing
containing the carbon black.
Industries
D 4821 Guide for Carbon Black—Validation of Test
3
5. Apparatus
Method Precision and Bias
5.1 Balance, analytical, with an 0.01-g sensitivity.
3. Summary of Test Method 5.2 Oven, gravity-convection type, capable of maintaining
125° 6 5°C.
3.1 In this test method, oil is added by means of a
5.3 Spatula, rubber, 100-mm.
constant-rate buret to a sample of carbon black in the mixer
5.4 Absorptometer, equipped with a constant-rate buret that
chamber of an absorptometer. As the sample absorbs the oil,
3
4
delivers 4 6 0.024 cm /min.
the mixture changes from a free-flowing state to one of a
5.5 Desiccator.
semiplastic agglomeration, with an accompanying increase in
6. Reagent and Standards
6.1 Purity of Reagents—Reagent grade chemicals shall be
1
This test method is under the jurisdiction ofASTM Committee D24 on Carbon
used in all tests. Unless otherwise indicated, it is intended that
Black and is the direct responsibility of Subcommittee D24.11 on Carbon Black
Structure.
Current edition approved Oct. 1, 2006. Published November 2006. Originally
3
approved in 1965. Last previous edition approved in 2006 as D2414–06. All apparatus are to be operated and maintained in accordance with the
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or manufacturers’ directions for optimum performance.
4
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM Available from C. W. Brabender Instruments, Inc., 50 E. Wesley St., Sout
Standards volume information, refer to the standard’s Document Summary page on Hackensack,NJ07606(www.brabender.com)andfromHITECLuxembourg,5Rue
the ASTM website. de l’Eglise, L-1458 Luxembourg (www.hitec.lu).
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
1

---------------------- Page: 1 ----------------------
e1
D2414–06a
mentstainlesssteelbowlsshouldalsobepre-polishedinthesamemanner
all reagents shall conform to the specifications of the Commit-
(see Annex A3).
tee onAnalytical Reagents of theAmerican Chemical Society,
5
where such specifications are available. Other grades may be
8.2 Calib
...

This document is not anASTM standard and is intended only to provide the user of anASTM standard an indication of what changes have been made to the previous version. Because
it may not be technically possible to adequately depict all changes accurately, ASTM recommends that users consult prior editions as appropriate. In all cases only the current version
of the standard as published by ASTM is to be considered the official document.
e1
Designation:D2414–06 Designation:D2414–06a
Standard Test Method for
1
Carbon Black—Oil Absorption Number (OAN)
This standard is issued under the fixed designation D2414; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision.Anumber in parentheses indicates the year of last reapproval.A
superscript epsilon (e) indicates an editorial change since the last revision or reapproval.
This standard has been approved for use by agencies of the Department of Defense.
1
e NOTE—Footnote 4 revised editorially in October 2007.
1. Scope
1.1 This test method covers the determination of the oil absorption number of carbon black.
1.2 The values stated in SI units are to be regarded as the standard. The values given in parentheses are for information only.
1.3 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility
of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory
limitations prior to use.
2. Referenced Documents
2
2.1 ASTM Standards:
D1765 Classification System for Carbon Blacks Used in Rubber Products
D1799 Practice for Carbon BlackSampling Packaged Shipments
D1900 Practice for Carbon BlackSampling Bulk Shipments
D4483 PracticeforEvaluatingPrecisionforTestMethodStandardsintheRubberandCarbonBlackManufacturingIndustries
D4821 Guide for Carbon BlackValidation of Test Method Precision and Bias
3. Summary of Test Method
3.1 In this test method, oil is added by means of a constant-rate buret to a sample of carbon black in the mixer chamber of an
absorptometer.Asthesampleabsorbstheoil,themixturechangesfromafree-flowingstatetooneofasemiplasticagglomeration,
with an accompanying increase in viscosity. This increased viscosity is transmitted to the torque-sensing system of the
absorptometer. When the viscosity of the mixture reaches a predetermined torque level, the absorptometer and buret will shut off
simultaneously. The volume of oil added is read from the direct-reading buret. The volume of oil per unit mass of carbon black
is the oil absorption number.
3.2 Either DBP or paraffin oil is acceptable for use with standard pelleted grades including N-series carbon blacks found in
Classification D1765. OAN testing using paraffin oil on some specialty blacks and powder blacks may result in unacceptable
differences as compared to OAN testing using DBP oil. While studies have shown either oil to exhibit comparable precision,
paraffin oil offers the advantage of being non-hazardous; even FDA-approved grades are available. For either oil, Sections 8-11
(Calibration, Procedure, Calculation, and Report) are to be consistent with the oil selected for use. Referee testing between
suppliers and users should use DBP oil until such time that precision data are available for paraffin oil.
4. Significance and Use
4.1 The oil absorption number of a carbon black is related to the processing and vulcanizate properties of rubber compounds
containing the carbon black.
3
5. Apparatus
5.1 Balance, analytical, with an 0.01-g sensitivity.
5.2 Oven, gravity-convection type, capable of maintaining 125° 6 5°C.
1
ThistestmethodisunderthejurisdictionofASTMCommitteeD24onCarbonBlackandisthedirectresponsibilityofSubcommitteeD24.11onCarbonBlackStructure
.
Current edition approved Aug.Oct. 1, 2006. Published AugustNovember 2006. Originally approved in 1965. Last previous edition approved in 20052006 as
D2414–05a.D2414–06.
2
ForreferencedASTMstandards,visittheASTMwebsite,www.astm.org,orcontactASTMCustomerServiceatservice@astm.org.For Annual Book of ASTM Standards
volume information, refer to the standard’s Document Summary page on the ASTM website.
3
All apparatus are to be operated and maintained in accordance with the manufacturers’ directions for optimum performance.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
1

---------------------- Page: 1 ----------------------
e1
D2414–06a
5.3 Spatula, rubber, 100-mm.
3 4
5.4 Absorptometer, equipped with a constant-rate buret that delivers 4 6 0.024 cm /min.
5.5 Desiccator.
6. Reagent and Standards
6.1 Purity of Reagents—Reagent grade chemicals shall be used in all tests. Unless otherwise indicated, it is intended that all
reagents shall conform to the specifications of the Committee on Analytical Reagents of the American Chemical Society, where
5
such specifications are available. Other
...

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