DIN EN ISO 2811-2-2011 Paints and varnishes - Determination of density - Part 2 Immersed body (plummet) method (ISO 2811-2 2011) German version EN ISO 2811-2 2011《色漆和清漆 密度的测定 第2部分 .pdf

1、June 2011 Translation by DIN-Sprachendienst.English price group 10No part of this translation may be reproduced without prior permission ofDIN Deutsches Institut fr Normung e. V., Berlin. Beuth Verlag GmbH, 10772 Berlin, Germany,has the exclusive right of sale for German Standards (DIN-Normen).ICS 8

2、7.040!$s)c“1800664www.din.deDDIN EN ISO 2811-2Paints and varnishes Determination of density Part 2: Immersed body (plummet) method (ISO 2811-2:2011)English translation of DIN EN ISO 2811-2:2011-06Beschichtungsstoffe Bestimmung der Dichte Teil 2: Tauchkrper-Verfahren (ISO 2811-2:2011)Englische berset

3、zung von DIN EN ISO 2811-2:2011-06Peintures et vernis Dtermination de la masse volumique Partie 2: Mthode par immersion dun corps (plongeur) (ISO 2811-2:2011)Traduction anglaise de DIN EN ISO 2811-2:2011-06SupersedesDIN EN ISO 2811-2:2002-02www.beuth.deDocument comprises pagesIn case of doubt, the G

4、erman-language original shall be considered authoritative.1605.11 DIN EN ISO 2811-2:2011-06 A comma is used as the decimal marker. National foreword This standard has been prepared by Technical Committee ISO/TC 35 “Paints and varnishes”, Subcommittee SC 9 “General test methods for paints and varnish

5、es” (Secretariat: BSI, United Kingdom) in collaboration with Technical Committee CEN/TC 139 “Paints and varnishes” (Secretariat: DIN, Germany). The responsible German body involved in its preparation was the Normenausschuss Beschichtungsstoffe und Beschichtungen (Coatings and Coating Materials Stand

6、ards Committee), Working Committee NA 002-00-07 AA Allgemeine Prfverfahren fr Beschichtungsstoffe und Beschichtungen. DIN EN ISO 2811 consists of the following parts, under the general title Paints and varnishes Determination of density: Part 1: Pyknometer method Part 2: Immersed body (plummet) meth

7、od Part 3: Oscillation method Part 4: Pressure cup method The DIN Standards corresponding to the International Standards referred to in this document are as follows: ISO 1513 DIN EN ISO 1513 ISO 15528 DIN EN ISO 15528 Re 5 Temperature Examples of relevant German regulations are the Eichordnung (Veri

8、fication Ordinance) and the Fertigpackungsverordnung (Prepackages Ordinance). Amendments This standard differs from DIN EN ISO 2811-2:2002-02 as follows: a) the unit for the density has been changed from grams per millilitre to grams per cubic centimetre, as this is the more common SI unit; b) the d

9、etermination in duplicate has been changed to a single determination; c) the information on the calibration procedure has been changed to an example only and the status of Annex A has been changed from normative to informative; d) the precision data ha been updated by an interlaboratory test; vee) t

10、he normative references have been updated. 2 DIN EN ISO 2811-2:2011-06 Previous editions DIN 53217-1: 1981-01, 1991-03 DIN 53217-3: 1984-10, 1991-03 DIN EN ISO 2811-2: 2002-02 National Annex NA (informative) Bibliography DIN EN ISO 1513, Paints and varnishes Examination and preparation of test sampl

11、es DIN EN ISO 15528, Paints, varnishes and raw materials for paints and varnishes Sampling 3 DIN EN ISO 2811-2:2011-06 4 This page is intentionally blank EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN ISO 2811-2 March 2011 ICS 87.040 Supersedes EN ISO 2811-2:2001English Version Paints and varn

12、ishes - Determination of density - Part 2: Immersed body (plummet) method (ISO 2811-2:2011) Peintures et vernis - Dtermination de la masse volumique - Partie 2: Mthode par immersion dun corps (plongeur) (ISO 2811-2:2011) Beschichtungsstoffe - Bestimmung der Dichte - Teil 2: Tauchkrper-Verfahren (ISO

13、 2811-2:2011) This European Standard was approved by CEN on 19 February 2011. CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard the status of a national standard without any alteration. Up-to-date lists and bibl

14、iographical references concerning such national standards may be obtained on application to the CEN-CENELEC Management Centre or to any CEN member. This European Standard exists in three official versions (English, French, German). A version in any other language made by translation under the respon

15、sibility of a CEN member into its own language and notified to the CEN-CENELEC Management Centre has the same status as the official versions. CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Gre

16、ece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG Managem

17、ent Centre: Avenue Marnix 17, B-1000 Brussels 2011 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN ISO 2811-2:2011: EForeword 3Contents Page 1 Scope 2 Normative references 3 Terms and definitions . 4 Principle . 5 Temperature. 6 Ap

18、paratus. 7 Sampling 8 Procedure. 8.1 General . 8.2 Determination 9 Calculation . 10 Precision 10.1 General . 10.2 Repeatability limit, r 10.3 Reproducibility limit, R 11 Test report Annex A (informative) Example of a calibration method Annex B (informative) Temperature variation EN ISO 2811-2:2011 (

19、E) DIN EN ISO 2811-2:2011-06 244444566667888881011Foreword This document (EN ISO 2811-2:2011) has been prepared by Technical Committee ISO/TC 35 “Paints and varnishes“ in collaboration with Technical Committee CEN/TC 139 “Paints and varnishes” the secretariat of which is held by DIN. This European S

20、tandard shall be given the status of a national standard, either by publication of an identical text or by endorsement, at the latest by September 2011, and conflicting national standards shall be withdrawn at the latest by September 2011. Attention is drawn to the possibility that some of the eleme

21、nts of this document may be the subject of patent rights. CEN and/or CENELEC shall not be held responsible for identifying any or all such patent rights. This document supersedes EN ISO 2811-2:2001. According to the CEN/CENELEC Internal Regulations, the national standards organizations of the follow

22、ing countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovak

23、ia, Slovenia, Spain, Sweden, Switzerland and the United Kingdom. Endorsement notice The text of ISO 2811-2:2011 has been approved by CEN as a EN ISO 2811-2:2011 without any modification. EN ISO 2811-2:2011 (E) DIN EN ISO 2811-2:2011-06 31 Scope This part of ISO 2811 specifies a method for determinin

24、g the density of paints, varnishes and related products, using balls or other round bodies as immersion bodies (plummets). The method is limited to materials of low or medium viscosity, and is particularly suitable for production control. 2 Normative references The following referenced documents are

25、 indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. ISO 1513, Paints and varnishes Examination and preparation of test samples ISO 15528, P

26、aints, varnishes and raw materials for paints and varnishes Sampling 3 Terms and definitions For the purposes of this document, the following terms and definitions apply. 3.1 density mass divided by the volume of a portion of a material NOTE It is expressed in grams per cubic centimetre. 4 Principle

27、 The method is based on Archimedes principle. A container is filled with the product under test and placed on the analytical balance. The plummet is attached to a tripod and is immersed in the product under test. The density is calculated from the balance readings before the plummet is immersed in t

28、he material under test and after it is immersed. 5 Temperature The effect of temperature on density is highly significant with respect to filling properties, and varies with the type of product. EN ISO 2811-2:2011 (E) DIN EN ISO 2811-2:2011-06 4For international reference purposes, it is essential t

29、o standardize one test temperature, and (23,0 0,5) C is specified in this part of ISO 2811. However, it can be more convenient to carry out comparative testing at some other agreed temperature, for example (20,0 0,5) C, as specified by relevant weights and measures legislation (see B.2). The test sa

30、mple and plummet shall be conditioned to the specified or agreed temperature, and it shall be ensured that the temperature variation does not exceed 0,5 C during testing. 6 Apparatus Ordinary laboratory apparatus and glassware, together with the following. 6.1 Plummets, of non-corrodible metal, e.g.

31、 copper-zinc alloy (brass), stainless steel or aluminium, as illustrated in Figure 1. The type illustrated is available with a volume of 10 cm3or 100 cm3. Dimensions in millimetres Key 1 volume 100 cm3or 10 cm3to the centre of the constriction in the stem d 3 mm for the 100 cm3plummet or 1 mm for th

32、e 10 cm3plummet Figure 1 Plummet Each plummet shall be marked with its volume, the reference temperature and the surface tension and density of the reference liquid in the following form: 100 cm323 C 25 mN/m 1,2 g/cm36.2 Analytical balance, accurate to 10 mg. 6.3 Thermometer, accurate to 0,2 C and g

33、raduated at intervals of 0,2 C or finer. 6.4 Temperature-controlled chamber, capable of accommodating the balance, plummet and sample and maintaining them at the specified or agreed temperature (see Clause 5). EN ISO 2811-2:2011 (E) DIN EN ISO 2811-2:2011-06 56.5 Tripod or other suitable device, for

34、 suspending the plummet and accurately adjusting its depth of immersion. 7 Sampling Take a representative sample of the product under test, as described in ISO 15528. Examine and prepare the sample, as described in ISO 1513. 8 Procedure 8.1 General Carry out a single determination on a fresh test sa

35、mple. The volume of the plummet shall be calibrated. 8.2 Determination 8.2.1 Selection of procedure There are two procedures, one for all paints in general and one for those products containing fast-evaporating solvents. 8.2.2 Procedure A For all paints in general Ensure the plummet (6.1) is thoroug

36、hly clean before use. Place the plummet and the test sample next to the balance (6.2) in the temperature-controlled chamber (6.4) for approximately 30 min. Place a sufficient volume of the test sample in a vessel of suitable size and capacity, e.g. 400 cm3for a 100 cm3plummet and 100 cm3for a 10 cm3

37、plummet. Using the thermometer (6.3), measure the temperature of the test sample. Check throughout the determination that the temperature of the chamber remains within the specified limits. Place the vessel plus test sample on the balance and record the mass, m1(uncorrected for buoyancy), to the nea

38、rest 10 mg. Clamp the plummet onto the tripod (6.5) in such a way that it can be immersed in the sample without touching the sides of the vessel (see Figure 2). Immerse the plummet in the sample until the surface of the liquid reaches the middle of the constriction in the plummet stem and record the

39、 mass, m2, to the nearest 10 mg. NOTE If the balance is tared between weighings, mass m1= 0. EN ISO 2811-2:2011 (E) DIN EN ISO 2811-2:2011-06 6Figure 2 Determination of density by the plummet method 8.2.3 Procedure B For paints containing fast-evaporating solvents Ensure that the plummet (6.1) is th

40、oroughly clean before use. Place the plummet and the test sample next to the balance (6.2) in the temperature-controlled chamber (6.4) for approximately 30 min. Using the thermometer (6.3), measure the temperature, tT, of the test sample. Check throughout the determination that the temperature of th

41、e chamber remains within the specified limits. Place a vessel of suitable size, containing a sufficient volume of test sample, on a laboratory jack. Clamp the plummet onto a retort stand and place the stand on the balance in such a way that the plummet can be immersed in the sample by raising the la

42、boratory jack without the plummet touching the sides of the vessel. Record the mass, m2, of the stand plus plummet. Raise the laboratory jack until the surface of the liquid reaches the middle of the constriction in the plummet stem and record the mass, m1. Equation (1) can be used to calculate the

43、density, except that m1and m2are as follows: m1is the mass of the retort stand and plummet after immersion of the plummet in the sample; m2is the mass of the retort stand and plummet before immersion of the plummet. 9 Calculation Calculate the density, , of the product, in grams per cubic centimetre

44、, at the test temperature, tT, using Equation (1): 21tmmV= (1) EN ISO 2811-2:2011 (E) DIN EN ISO 2811-2:2011-06 7where m1is the mass, in grams, of the vessel containing the sample before immersion of the plummet; m2is the mass, in grams, of the vessel after immersion of the plummet; Vtis the volume,

45、 in cubic centimetres, of the plummet up to the middle of the constriction in the stem at the test temperature, tT, determined in accordance with Annex B. NOTE The result is not corrected for air buoyancy because the uncorrected value is required by most filling-machine control procedures and the co

46、rrection (0,001 2 g/cm3) is negligible in relation to the precision of the method. If the test temperature used is not the reference temperature, the density may be calculated using Equation (B.2). 10 Precision 10.1 General The precision of the method depends on the characteristics of the product to

47、 be tested. For materials which contain no entrapped air, the values in 10.2 and 10.3 are valid. 10.2 Repeatability limit, r The value below which the absolute difference between two single test results, obtained on identical material by one operator in one laboratory, within a short interval of tim

48、e using the standardized test method, may be expected to lie, with a 95 % probability using the same equipment is 0,002 g/cm3for solvents, 0,011 g/cm3for coating materials using the 10 cm3plummet, and 0,003 g/cm3for coating materials using the 100 cm3plummet. 10.3 Reproducibility limit, R The value

49、below which the absolute difference between two test results, obtained on identical material by operators in different laboratories using the standardized test method, may be expected to lie, with a 95 % probability, is 0,004 g/cm3for solvents, 0,030 g/cm3for coating materials using the 10 cm3plummet, and 0,004 g/cm3for coating materials using the 100 cm3plummet. 11 Test report The test report shall include at least the following information: a) all details necessary to identify the product teste