1、Designation: D4283 98 (Reapproved 2010)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 num
2、ber in 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
3、 units are 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 a
4、nd health practices 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
5、 fluids is typically 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 Recommendatio
6、ns:4.1.1 Ostwald Viscometerup 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,of256 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. Pre
7、paration of Sample5.1 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. Calibration6.1 Viscometer Constant (F)Consult the manufacturersinstructions for calibrating individua
8、l viscometers.7. Procedure7.1 Follow manufacturers directions for using their vis-cometers.8. Calculation8.1 Calculate the viscosity of silicone fluids as follows:Efflux Time s!3Viscometer Constant F!5Viscosity cSt!9. Precision and Bias9.1 PrecisionDuplicate results by the same operator shallnot be
9、considered 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 Committe
10、e D21 on Polishesand is the direct responsibility of Subcommittee D21.02 on Raw Materials.Current edition approved May 1, 2010. Published May 2010. Originallyapproved in 1983. Last previous edition approved in 2004 as D4283 98 (2004).DOI: 10.1520/D4283-98R10.2For referenced ASTM standards, visit the
11、 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.1Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, U
12、nited States.ASTM International takes no position respecting the validity of any patent rights asserted in connection with any item mentionedin this standard. Users of this standard are expressly advised that determination of the validity of any such patent rights, and the riskof infringement of suc
13、h rights, are entirely their own responsibility.This standard is subject to revision at any time by the responsible technical committee and must be reviewed every five years andif not revised, either reapproved or withdrawn. Your comments are invited either for revision of this standard or for addit
14、ional standardsand should be addressed 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
15、 ASTM Committee on Standards, at the 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 ASTM website (www.astm.org/COPYRIGHT/).D4283 98 (2010)2
