1、Designation:D428398(Reapproved 2015)Standard Test Method forViscosity of Silicone Fluids1This standard is issued under the fixed designation D4283;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
2、parentheses indicates the year of last reapproval.Asuperscript epsilon()indicates an editorial change since the last revision or reapproval.1.Scope1.1 This test method covers the measurement of the kine-matic viscosity of silicone fluids for polish applications.1.2 The values stated in SI units are
3、to be regarded asstandard.No other units of measurement are included in thisstandard.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 consult andestablish appropriate safety and health pract
4、ices and deter-mine the applicability 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)3.Significance and Use3.1 The viscosity of silicone fluids is typical
5、ly measured bykinematic viscosity.Test Method D445 describes the basicsand background for this measurement.The purpose of this testmethod is to set forth specific conditions and recommendapparatus for measuring viscosity of silicone fluids.4.Apparatus4.1 Viscometer Recommendations:4.1.1 Ostwald Visc
6、ometerup to 5000 cSt.4.1.2 Ubbelohde Viscometerup to 100 000 cSt.4.1.3 Cannon Fenskiup to 5000 cSt.4.2 Constant Temperature Bath,of 25 6 0.2 C.4.3 Cleaning Solution for Viscometers,such as toluene,alcoholic KOH.4.4 Fluid Standards,for calibrating viscometers.4.5 Stopwatch.5.Preparation of Sample5.1
7、After charging the fluid to the selected viscometer andplacing it in the constant temperature bath,keep in bath for aminimum of 15 min to reach the proper temperature level.6.Calibration and Standardization6.1 Viscometer Constant(F)Consult the manufacturersinstructions for calibrating individual vis
8、cometers.7.Procedure7.1 Follow manufacturers directions for using their vis-cometers.8.Calculation8.1 Calculate the viscosity of silicone fluids as follows:Efflux Times!3Viscometer ConstantF!5 ViscositycSt!9.Precision and Bias9.1 PrecisionDuplicate results by the same operator shallnot be considered
9、 suspect unless the differ by more than 65%.9.2 BiasThis test has no bias because the values producedare defined only in terms of this test method.10.Keywords10.1 Ostwald viscometer;polish;silicone fluids;siliconeoil;viscosity1This test method is under the jurisdiction ofASTM Committee D21 on Polish
10、esand is the direct responsibility of Subcommittee D21.02 on Raw Materials.Current edition approved Oct.1,2015.Published November 2015.Originallyapproved in 1983.Last previous edition approved in 2010 as D4283 98(2010).DOI:10.1520/D4283-98R15.2For referenced ASTM standards,visit the ASTM website,www
11、.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 ASTM Internat
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14、dressed to ASTM International Headquarters.Your comments will receive careful consideration at a meeting of theresponsible technical committee,which you may attend.If you feel that your comments have not received a fair hearing you shouldmake your views known to the ASTM Committee on Standards,at th
15、e address shown below.This standard is copyrighted by ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959,United States.Individual reprints(single or multiple copies)of this standard may be obtained by contacting ASTM at the aboveaddress or at 610-832-9585(phone),610-832-9555(fax),or serviceastm.org(e-mail);or through the ASTM website(www.astm.org).Permission rights to photocopy the standard may also be secured from the Copyright Clearance Center,222Rosewood Drive,Danvers,MA 01923,Tel:(978)646-2600;http:/ 98(2015)2
