1、Designation: D4287 00 (Reapproved 2014)Standard Test Method forHigh-Shear Viscosity Using a Cone/Plate Viscometer1This standard is issued under the fixed designation D4287; the number immediately following the designation indicates the year oforiginal adoption or, in the case of revision, the year o
2、f last revision. A number in parentheses indicates the year of last reapproval. Asuperscript epsilon () indicates an editorial change since the last revision or reapproval.This standard has been approved for use by agencies of the U.S. Department of Defense.1. Scope*1.1 This test method covers the d
3、etermination 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 volatil
4、es 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
5、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:2D1210 Test Method for Fineness of Dispersion of Pigment-Vehicle Systems by Hegman-Type GageD3925 Practice for Sampling Liquid Paint
6、s and RelatedPigmented CoatingsD4958 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 D4958), spraying,electrostatic disk, or roll coating.4.2 This test method is sui
8、table 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 D1210.5. Appar
9、atus5.1 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 up
10、onagreement 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 P
11、, 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 min
12、eral 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 possibili
13、ty of shear thinning behavior at high shear rates.1This test method is under the jurisdiction of ASTM Committee D01 on Paintand Related Coatings, Materials, andApplications and is the direct responsibility ofSubcommittee D01.24 on Physical Properties of Liquid Paints viscom-eterICI cone/plate; visco
14、metercone/plate4Supporting data have been filed at ASTM International Headquarters and maybe obtained by requesting Research Report RR:D01-1035. ContactASTM CustomerService at serviceastm.org.D4287 00 (2014)3SUMMARY OF CHANGESCommittee D01 has identified the location of selected changes to this stan
15、dard since the last issue(D428700(2010) that may impact the use of this standard. (Approved December 1, 2014.)(1) Added new Note 4.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
16、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 years andif no
17、t 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 committee, which
18、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 19428-2959,Unit
19、ed 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:/ 00 (2014)4
