1、BRITISH STANDARDBS EN ISO 2884-2:2006 BS 3900-A7-2: 2003Incorporating amendment no. 1 to BS 3900-A7-2:2003 (renumbers the BS as BS EN ISO 2884-2:2006)Paints and varnishes Determination of viscosity using rotary viscometers Part 2: Disc or ball viscometer operated at a specified speedThis European St
2、andard EN ISO 2884-2:2006 has the status of a British StandardICS 87.040g49g50g3g38g50g51g60g44g49g42g3g58g44g55g43g50g56g55g3g37g54g44g3g51g40g53g48g44g54g54g44g50g49g3g40g59g38g40g51g55g3g36g54g3g51g40g53g48g44g55g55g40g39g3g37g60g3g38g50g51g60g53g44g42g43g55g3g47g36g58BS EN ISO 2884-2:2006This Br
3、itish Standard was published under the authority of the Standards Policy and Strategy Committee on 14 July 2003 BSI 2007ISBN 0 580 42257 7National forewordThis British Standard was published by BSI. It is the UK implementation of EN ISO 2884-2:2006. It is identical to ISO 2884-2:2003.The UK particip
4、ation in its preparation was entrusted to Technical Committee STI/10, Test methods for paints. A list of organizations represented on this committee can be obtained on request to its secretary.This publication does not purport to include all the necessary provisions of a contract. Users are responsi
5、ble for its correct application. Compliance with a British Standard cannot of itself confer immunity from legal obligations.Amendments issued since publicationAmd. No. Date Comments16864 28 February 2007 Renumbers the BS as BS EN ISO 2884-2:2006EUROPEAN STANDARDNORME EUROPENNEEUROPISCHE NORMEN ISO 2
6、884-2June 2006ICS 87.040English VersionPaints and varnishes - Determination of viscosity using rotaryviscometers - Part 2: Disc or ball viscometer operated at aspecified speed (ISO 2884-2:2003)Peintures et vernis - Dtermination de la viscosit aumoyen de viscosimtres rotatifs - Partie 2: Viscosimtre
7、disque ou bille fonctionnant vitesse spcifie (ISO2884-2:2003)Beschichtungsstoffe - Bestimmung der Viskositt mitRotationsviskosimetern - Teil 2: Scheiben- oderKugelviskosimeter bei festgelegter Geschwindigkeit (ISO2884-2:2003)This European Standard was approved by CEN on 18 May 2006.CEN members are b
8、ound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this EuropeanStandard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such nationalstandards may be obtained on application to the C
9、entral Secretariat or to any CEN member.This European Standard exists in three official versions (English, French, German). A version in any other language made by translationunder the responsibility of a CEN member into its own language and notified to the Central Secretariat has the same status as
10、 the officialversions.CEN members are the national standards bodies of Austria, Belgium, Cyprus, Czech Republic, Denmark, Estonia, Finland, France,Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania,Slovakia, Sloveni
11、a, Spain, Sweden, Switzerland and United Kingdom.EUROPEAN COMMITTEE FOR STANDARDIZATIONCOMIT EUROPEN DE NORMALISATIONEUROPISCHES KOMITEE FR NORMUNGManagement Centre: rue de Stassart, 36 B-1050 Brussels 2006 CEN All rights of exploitation in any form and by any means reservedworldwide for CEN nationa
12、l Members.Ref. No. EN ISO 2884-2:2006: EForeword The text of ISO 2884-2:2003 has been prepared by Technical Committee ISO/TC 35 “Paints and varnishes” of the International Organization for Standardization (ISO) and has been taken over as EN ISO 2884-2:2006 by Technical Committee CEN/TC 139 “Paints a
13、nd varnishes“, the secretariat of which is held by DIN. This European Standard shall be given the status of a national standard, either by publication of an identical text or by endorsement, at the latest by December 2006, and conflicting national standards shall be withdrawn at the latest by Decemb
14、er 2006. According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, L
15、atvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom. Endorsement notice The text of ISO 2884-2:2003 has been approved by CEN as EN ISO 2884-2:2006 without any modifications. EN ISO 2884-2:2006Reference
16、 numberISO 2884-2:2003(E)OSI 3002INTERNATIONAL STANDARD ISO2884-2First edition2003-03-01Paints and varnishes Determination of viscosity using rotary viscometers Part 2: Disc or ball viscometer operated at a specified speed Peintures et vernis Dtermination de la viscosit au moyen de viscosimtres rota
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22、rhgts seredevr iiiContents Page Foreword iv 1 Scope 1 2 Normative references . 1 3 Apparatus. 2 4 Sampling 4 5 Checking the apparatus . 4 6 Procedure. 5 7 Cleaning of apparatus 5 8 Expression of results 6 9 Precision 6 10 Test report 6 Bibliography . 7 EN ISO 2884-2:2006iv I SO 3002 All irhgts sered
23、evrForeword ISO (the International Organization for Standardization) is a worldwide federation of national standards bodies (ISO member bodies). The work of preparing International Standards is normally carried out through ISO technical committees. Each member body interested in a subject for which
24、a technical committee has been established has the right to be represented on that committee. International organizations, governmental and non-governmental, in liaison with ISO, also take part in the work. ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matt
25、ers of electrotechnical standardization. International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 2. The main task of technical committees is to prepare International Standards. Draft International Standards adopted by the technical committees are circul
26、ated to the member bodies for voting. Publication as an International Standard requires approval by at least 75 % of the member bodies casting a vote. Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. ISO shall not be held responsib
27、le for identifying any or all such patent rights. ISO 2884-2 was prepared by Technical Committee ISO/TC 35, Paints and varnishes, Subcommittee SC 9, General test methods for paints and varnishes. ISO 2884 consists of the following parts, under the general title Paints and varnishes Determination of
28、viscosity using rotary viscometers: Part 1: Cone-and-plate viscometer operated at a high rate of shear Part 2: Disc or ball viscometer operated at a specified speed EN ISO 2884-2:2006I SO 3002 All irhgts seredevr 1Paints and varnishes Determination of viscosity using rotary viscometers Part 2: Disc
29、or ball viscometer operated at a specified speed WARNING Persons using this part of ISO 2884 should be familiar with normal laboratory practice. This part of ISO 2884 does not purport to address all of the safety problems, if any, associated with its use. It is the responsibility of the user to esta
30、blish appropriate health and safety practices and to ensure compliance with any national regulatory conditions. 1 Scope This part of ISO 2884 specifies a general procedure for determining the viscosity of paints, varnishes and related products with a viscosity of up to 34 Pas. It is applicable mainl
31、y during production and thinning. It supplements ISO 2431, Paints and varnishes Determination of flow time by use of flow cups; ISO 2884-1, Paints and varnishes Determination of viscosity using rotary viscometers Part 1: Cone-and-plate viscometer operated at a high rate of shear. For more accurate m
32、ethods of measurement of viscosity, refer to ISO 3219, Plastics Polymers/resins in the liquid state or as emulsions or dispersions Determination of viscosity using a rotational viscometer with defined shear rate. The apparatus specified may be used in both a laboratory and a factory environment to d
33、etermine the viscosity of a product and to monitor the viscosity whilst thinning during a manufacturing process. 2 Normative references The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated referen
34、ces, the latest edition of the referenced document (including any amendments) applies. ISO 1513:1992, Paints and varnishes Examination and preparation of samples for testing ISO 3104:1994, Petroleum products Transparent and opaque liquids Determination of kinematic viscosity and calculation of dynam
35、ic viscosity ISO 3105:1994, Glass capillary kinematic viscometers Specifications and operating instructions ISO 15528:2000, Paints, varnishes and raw materials for paints and varnishes Sampling EN ISO 2884-2:20062 I SO 3002 All irhgts seredevr3 Apparatus 3.1 Rotary viscometer (see Figure 1), of one
36、of the types specified in 3.1.1 and 3.1.2. Dimensions in millimetres Key 1 viscometer 2 thermometer or temperature probe 3 type 1 spindle 4 type 2 spindle 5 type 3 spindle 6 container 7 level of inside surface of bottom of container, with nominal spindle heights indicated Figure 1 Rotary viscometer
37、with disc and ball spindles 3.1.1 Digital-display viscometer, capable of operating at a spindle speed of 562 rpm 2 % and having an accuracy, for a Newtonian fluid, within 1 % of the full-scale reading, for the viscosity ranges stated in 3.2.1 and 3.2.2. The torque is measured by an electronic method
38、. 3.1.2 Analogue-display viscometer, capable of operating at a spindle speed of 562 rpm 2 % and having an accuracy, for a Newtonian fluid, within 1 % of the full-scale reading, for the viscosity ranges stated in 3.2.1 and 3.2.2. A spring is used to counteract the torque generated by the fluid. EN IS
39、O 2884-2:2006I SO 3002 All irhgts seredevr 33.2 Spindles (see Figure 2), of the following types: 3.2.1 Disc spindle (type 1), for use with viscosities up to 1,5 Pas (1 500 mPas), with an average shear rate of approximately 200 s1with a Newtonian fluid. The disc shall have cross-channels designed to
40、produce a slight agitating action. The dimensions shall be as shown in Figure 2. 3.2.2 Ball spindles (types 2 and 3), for use with viscosities up to 6,5 Pas (type 2) and 34 Pas (type 3), with an average shear rate of approximately 44 s1and 20 s1, respectively, with a Newtonian fluid. The dimensions
41、shall be as shown in Figure 2. Dimensions in millimetres Key 1 disc spindle (type 1) 2 ball spindle (types 2 and 3) Spindle Viscosity range Diameter, D Type 2 0 mPas to 6 500 mPas (6,5 Pas) 31,75 mm Type 3 0 mPas to 34 000 mPas (34 Pas) 19,05 mm Figure 2 Disc and ball spindles EN ISO 2884-2:20064 I
42、SO 3002 All irhgts seredevr3.3 Container, comprising a round paint can, as shown in Figure 3, with a capacity of 250 ml, a nominal internal diameter of 74 mm, a height of 74 mm and a filling-aperture diameter of 61 mm. If a different container is used, the viscometer shall be calibrated accordingly
43、(see Clause 5). NOTE Different can sizes may result in different viscosity readings. Therefore users are advised to use the same can size when comparing samples. Dimensions in millimetres Figure 3 Container 3.4 Temperature-control device, capable of maintaining the container and fluid at (23 0,3) C.
44、 3.5 Calibrated thermometer, accurate to 0,3 C and graduated at intervals of 0,2 C or finer. 3.6 Calibration fluids: standard refined mineral oils having Newtonian characteristics. The viscosities shall be within 2 % of the stated values. The viscosities of the standard fluids shall have been determ
45、ined by an accredited laboratory using an absolute method such as one of those specified in ISO 3104 or ISO 3105. 4 Sampling Take a representative sample of the product to be tested, as described in ISO 15528. Examine the sample and prepare it for testing as described in ISO 1513. If necessary, stra
46、in the sample through a sieve of nominal mesh size 125 m into a clean container (3.3). The volume of the sample shall be sufficient to fill the 250 ml container to within about 15 mm of the top. 5 Checking the apparatus The apparatus shall be checked on a regular basis in accordance with the manufac
47、turers recommendations and from experience gained in the use of the instrument (i.e. comparing results against those from previous checks, hence enabling the required frequency of checking to be established). The instrument shall be checked at (23 0,3) C, or, by agreement between the interested part
48、ies, at another temperature, with three calibration fluids (3.6) selected to cover the measurement range of the apparatus. Pour one of the calibration fluids into the 250 ml container (3.3), maintained at (23 0,3) C (or the temperature agreed between the interested parties), filling it to within abo
49、ut 20 mm of the top. Place the filled container under the viscometer and position it centrally below the spindle. Slowly lower the spindle into the EN ISO 2884-2:2006I SO 3002 All irhgts seredevr 5fluid until it reaches the correct level above the bottom of the container (see Figure 1). Then add fluid until the level reaches the line on the spindle shaft. During these operations, ensure that there are no air bubbles trapped in the fluid, paying spe
