1、Designation: D 4287 00 (Reapproved 2005)Standard Test Method forHigh-Shear Viscosity Using a Cone/Plate Viscometer1This standard is issued under the fixed designation D 4287; the number immediately following the designation indicates the year oforiginal adoption or, in the case of revision, the year
2、 of last revision. A number in parentheses indicates the year of last reapproval. Asuperscript epsilon (e) indicates an editorial change since the last revision or reapproval.This standard has been approved for use by agencies of the Department of Defense.1. Scope1.1 This test method covers the dete
3、rmination of the viscos-ity of paints, varnishes, and related products at a rate of shearof 12 000 s1.1.2 Paints and varnishes that dry very rapidly may not givereproducible results with this test method. Measurements madeat elevated temperatures may also give poor precision due toloss of volatiles
4、and to drying.1.3 The values stated in SI units are to be regarded asstandard. No other units of measurement are included in thisstandard.1.4 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
5、establish appro-priate safety and health practices and determine the applica-bility of regulatory limitations prior to use.2. Referenced Documents2.1 ASTM Standards:2D 1210 Test Method for Fineness of Dispersion of Pigment-Vehicle Systems by Hegman-Type GageD 3925 Practice for Sampling Liquid Paints
6、 and RelatedPigmented CoatingsD 4958 Test Method for Comparison of the Brush Drag ofLatex Paints3. Summary of Test Method3.1 The material to be tested is placed between the cone andplate of a cone/plate viscometer, then subjected to a high shearrate while the viscosity is determined.4. Significance
7、and Use4.1 The viscosity value obtained by this test method givesinformation about the flow properties of the material underhigh-shear conditions similar to those encountered duringapplication: brushing (see Test Method D 4958), spraying,electrostatic disk, or roll coating.4.2 This test method is su
8、itable for all paints and varnisheswhether they are Newtonian in behavior or not. However, dueto the narrow gap between the stationary and rotary parts ofhigh-shear viscometers, this test method is more reproduciblefor paints having finer pigment dispersions as determined byTest Method D 1210.5. App
9、aratus5.1 Cone/Plate Type Viscometer,with cone/speed combina-tion producing a rate of shear of 12 000 s1. The viscometermust provide a viscosity measurement rage of either 0 to 10 (P)or 0 to 5 (P) at the above mentioned shear rate. With higherviscosity materials, other cones and speeds may be used u
10、ponagreement between the producer and the user, but it should benoted that these may give lower shear rates not truly represen-tative of application conditions. Refer to Fig. 1 and Fig. 2 of ananalog and digital cone and plate viscometer.NOTE 1The SI units for viscosity are pascal-seconds (Pas = 10
11、P, 1mPas = 1 cP).6. Reagents and Materials6.1 Water or SolventThe viscometer should be zeroedaccording to the manufacturers specification. Zeroing proce-dures that require liquid may be satisfied with water or a lowviscosity solvent such as xylene or mineral spirits.6.2 Mineral OilsThree standard mi
12、neral oils with knownviscosities (certified by an approved laboratory) lying between10 and 90 % of full scale to be used for calibrating theinstrument.3NOTE 2Silicone oils should be avoided because of their tendency tocontaminate instruments, containers and other equipment and because ofthe possibil
13、ity of shear thinning behavior at high shear rates.7. Sampling7.1 Take a representative sample of the product to be testedin accordance with Practice D 3925. If the sample has a1This test method is under the jurisdiction of ASTM Committee D01 on Paintand Related Coatings, Materials, andApplications
14、and is the direct responsibility ofSubcommittee D01.24 on Physical Properties of Liquid Paints viscom-eterICI cone/plate; viscometercone/plateASTM International takes no position respecting the validity of any patent rights asserted in connection with any item mentionedin this standard. Users of thi
15、s 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 must be reviewed every five yea
16、rs 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 theresponsible technical commit
17、tee, 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 C700, West Conshohocken, PA 1942
18、8-2959,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).4Supporting data are available from ASTM International Headquarters. RequestRR:D01-1035.D 4287 00 (2005)3
