ASTM_D_2414_-_14.pdf

Designation:D241414Standard Test Method forCarbon BlackOil Absorption Number(OAN)1This standard is issued under the fixed designation D2414;the number immediately following the designation indicates the year oforiginal adoption or,in the case of revision,the year of last revision.A number in parentheses indicates the year of last reapproval.Asuperscript epsilon()indicates an editorial change since the last revision or reapproval.This standard has been approved for use by agencies of the U.S.Department of Defense.1.Scope1.1 This test method covers the determination of the oilabsorption number of carbon black.1.2 The values stated in SI units are to be regarded as thestandard.The values given in parentheses are for informationonly.1.3 This standard does not purport to address all of thesafety concerns,if any,associated with its use.It is theresponsibility of the user of this standard to establish appro-priate safety and health practices and determine the applica-bility of regulatory limitations prior to use.2.Referenced Documents2.1 ASTM Standards:2D445 Test Method for Kinematic Viscosity of Transparentand Opaque Liquids(and Calculation of Dynamic Viscos-ity)D1218 Test Method for Refractive Index and RefractiveDispersion of Hydrocarbon LiquidsD1765 Classification System for Carbon Blacks Used inRubber ProductsD1799 Practice for Carbon BlackSampling PackagedShipmentsD1900 Practice for Carbon BlackSampling Bulk Ship-mentsD4052 Test Method for Density,Relative Density,and APIGravity of Liquids by Digital Density MeterD4483 Practice for Evaluating Precision for Test MethodStandards in the Rubber and Carbon Black ManufacturingIndustriesD4821 Guide for Carbon BlackValidation of Test MethodPrecision and BiasD5554 Test Method for Determination of the Iodine Value ofFats and Oils2.2 DIN Standards:3DIN 16945 Testing of resins,hardeners and accelerators,andcatalyzed resinsDIN EN ISO 660 Animal and vegetable fats and oils-Determination of acid value and acidity3.Summary of Test Method3.1 In this test method,oil is added by means of aconstant-rate buret to a sample of carbon black in the mixerchamber of an absorptometer.As the sample absorbs the oil,the mixture changes from a free-flowing state to one of asemiplastic agglomeration,with an accompanying increase inviscosity.This increased viscosity is transmitted to the torque-sensing system of the absorptometer.When the viscosity of themixture reaches a predetermined torque level,the absorptom-eter and buret will shut off simultaneously.The volume of oiladded is read from the direct-reading buret.The volume of oilper unit mass of carbon black is the oil absorption number.3.2 Either DBP,paraffin or epoxidized sunflower oils areacceptable for use with most standard pelleted grades of carbonblack including N-series carbon blacks found in ClassificationD1765.OAN testing using paraffin oils or epoxidized sun-flower oils on some standard blacks and specialty blacksincluding powder products may result in unacceptable differ-ences as compared to OAN testing with DBP oil.Paraffin andepoxidized sunflower oils are considered non-hazardous;someparaffin oils are FDA approved.For any of the oils,Sections 8 11(Calibration,Procedure,Calculation,and Report)are to beconsistent with the oil selected for use.Referee testing betweensuppliers and users should use DBP oil until such time thatprecision data are available for alternate oils.4.Significance and Use4.1 The oil absorption number of a carbon black is related tothe processing and vulcanizate properties of rubber compoundscontaining the carbon black.1This test method is under the jurisdiction of ASTM Committee D24 on CarbonBlack and is the direct responsibility of Subcommittee D24.11 on Carbon BlackStructure.Current edition approved July 1,2014.Published December 2014.Originallyapproved in 1965.Last previous edition approved in 2013 as D2414 13a.DOI:10.1520/D2414-14.2For referenced ASTM standards,visit the ASTM website,www.astm.org,orcontact ASTM Customer Service at serviceastm.org.For Annual Book of ASTMStandards volume information,refer to the standards Document Summary page onthe ASTM website.3Available from Deutsches Institut fur Normung e.V.(DIN),Burggrafenstrasse 6,10787 Berlin,Germany,http:/www.din.de.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 5.Apparatus45.1 Balance,analytical,with an 0.01-g sensitivity.5.2 Oven,gravity-convection type,capable of maintaining125 6 5C.5.3 Spatula,rubber,100-mm.5.4 Absorptometer,equipped with a constant-rate buret thatdelivers 4 6 0.024 cm3/min.55.5 Desiccator.6.Reagent and Standards6.1 Purity of ReagentsReagent grade chemicals shall beused in all tests.Unless otherwise indicated,it is intended thatall reagents shall conform to the specifications of the Commit-tee on Analytical Reagents of the American Chemical Society,where such specifications are available.6Other grades may beused,provided it is first ascertained that the reagent i