1、Designation: D 4283 98 (Reapproved 2004)Standard Test Method forViscosity of Silicone Fluids1This standard is issued under the fixed designation D 4283; the number immediately following the designation indicates the year oforiginal adoption or, in the case of revision, the year of last revision. A n
2、umber in parentheses indicates the year of last reapproval. Asuperscript epsilon (e) 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 This standard does n
3、ot 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 practices and deter-mine the applicability of regulatory limitations prior to use.2. Referenced Documents2.1 AS
4、TM Standards:2D 445 Test Method for Kinematic Viscosity of Transparentand Opaque Liquids (and the Calculation of DynamicViscosity)3. Significance and Use3.1 The viscosity of silicone fluids is typically measured bykinematic viscosity. Test Method D 445 describes the basicsand background for this mea
5、surement. 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 Viscometerup to 5000 cSt.4.1.2 Ubbelohde Viscometerup to 100 000 cSt.4.1.3 Cannon Fenskiup to 5000 c
6、St.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. Preparation of Sample5.1 After charging the fluid to the selected viscometer andplacing it in the constant temperature b
7、ath, 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 individual viscometers.7. Procedure7.1 Follow manufacturers directions for using their vis-cometers.8. Calculation8.1 Calculat
8、e 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 considered suspect unless the differ by more than 65%.9.2 BiasThis test has no bias because the values producedare de
9、fined only in terms of this test method.10. Keywords10.1 Ostwald viscometer; polish; silicone fluids; siliconeoil; viscosity1This test method is under the jurisdiction of ASTM Committee D21 on Polishesand is the direct responsibility of Subcommittee D21.01 on Raw Materials.Current edition approved S
10、ept. 1, 2004. Published September 2004. Originallyapproved in 1983. Last previous edition approved in 1998 as D 428398.2For 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
11、to the standards Document Summary page onthe ASTM website.1Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.ASTM International takes no position respecting the validity of any patent rights asserted in connection with any item mentione
12、din this standard. Users of this standard are expressly advised that determination of the validity of any such patent rights, and the riskof infringement of such rights, are entirely their own responsibility.This standard is subject to revision at any time by the responsible technical committee and
13、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 additional standardsand should be addressed to ASTM International Headquarters. Your comments will receive careful consideration at a meeting of
14、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 the address shown below.This standard is copyrighted by ASTM International, 100 Barr Harbor Drive, PO Box C
15、700, 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).D 4283 98 (2004)2
