ASTM_D_6267_-_D_6267M_-_13.pdf

Designation:D6267/D6267M13Standard Test Method forApparent Viscosity of Hydrocarbon Resins at ElevatedTemperatures1This standard is issued under the fixed designation D6267/D6267M;the number immediately following the designation indicates theyear of original adoption or,in the case of revision,the year of last revision.A number in parentheses indicates the year of lastreapproval.A superscript epsilon()indicates an editorial change since the last revision or reapproval.1.Scope1.1 This test method covers the determination of the appar-ent viscosity of hydrocarbon resins having apparent viscositiesup to 2,000,000 millipascal seconds(mPas)(Note 1)attemperatures up to 300C 572F.NOTE1The SI unit of(dynamic)viscosity is the pascal second.Thecentipoise(cP)is one millipascal second(mPas)and is frequently used asa viscosity unit.1.2 The values stated in either SI units or inch-pound unitsare to be regarded separately as standard.The values stated ineach system may not be exact equivalents;therefore,eachsystem shall be used independently of the other.Combiningvalues from the two systems may result in non-conformancewith the standard.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:2D6440 Terminology Relating to Hydrocarbon ResinsE691 Practice for Conducting an Interlaboratory Study toDetermine the Precision of a Test MethodE1 Specification for ASTM Liquid-in-Glass Thermometers3.Terminology3.1 The definitions in Terminology D6440 are applicable tothis test method.3.2 Definition Specific to This Standard:3.3 apparent viscosity,nof a hydrocarbon resin,the vis-cosity determined by this test method,expressed in millipascalseconds.3.3.1 DiscussionIts value may vary with the spindle androtational speed selected.4.Summary of Test Method4.1 The viscometer described in this test method can beused to determine the apparent viscosity of hydrocarbon resinsat elevated temperatures.Apparent viscosity is determinedunder temperature equilibrium conditions using a rotatingspindle type viscometer.The torque on a spindle rotating in athermostatted sample holder containing a small amount ofsample is used to measure the relative resistance to rotation.Afactor is applied to the torque reading to yield the viscosity inmPas.5.Significance and Use5.1 This test method is used to measure the apparentviscosity of hydrocarbon resins at elevated temperatures.Elevated temperature viscosity values of a hydrocarbon resinmay be related to the properties of coatings,adhesives and thelike,containing such a resin.5.2 For hydrocarbon resins,values of apparent viscositywill usually be a function of shear rate under the conditions oftest.Although the type of viscometer described in this testmethod operates under conditions of relatively low shear rate,shear rate depends on the spindle and rotational speed selectedfor a determination;therefore,comparisons between apparentviscosity values should be made only for measurements madewith similar viscometers under conditions of equivalent shearrate.6.Apparatus6.1 Rotational Viscometerrotating-spindle type with lev-eling stand.6.2 Viscometer Spindles,stainless steel.(WarningCaremust be taken in the storage and handling of spindles andassemblies.Protect them from scratches,dust,corrosion ordeposits,and mechanical abuse.Replace the spindle extensionif it is bent.Avoid touching the calibrated section of the spindle1This test method is under the jurisdiction of ASTM Committee D01 on Paintand Related Coatings,Materials,and Applications and is the direct responsibility ofSubcommittee D01.34 on Pine Chemicals and Hydrocarbon Resins.Current edition approved Nov.1,2013.Published December 2013.Originallyapproved in 1998.Last previous edition approved in 2008 as D6267 08.DOI:10.1520/D6267_D6267M-13.2For 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.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 with hands.Clean the spindle and sample chamber thoroughlyafter each use.A recommended cleaning procedure is includedin the procedure.)6.3 Temperature Controller,Thermocontainer(a heater forthe sample chamber),and Sample Chamber,designed for usewith the viscometer in 6.1,complete with locating ring,leveling screws,safety guard,spindle extension,insulating cap,alignment bracket,cooling plug(optional)and extracting tool.The precision temperature controller shall provide controlaccuracy of 61.0C or better through the range from 100 to150C 212 to 302F and 6 2.0C or better through the rangefrom 150 to 300C 302 to 572F.7.Assembly of