BS EN ISO 2811-4-2011 Paints and varnishes Determination of density Pressure cup method《涂料和清漆 密度的测定 压力杯法》.pdf

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1、raising standards worldwideNO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAWBSI Standards PublicationBS EN ISO 2811-4:2011Paints and varnishes Determination of densityPart 4: Pressure cup method (ISO2811-4:2011)BS EN ISO 2811-4:2011 BRITISH STANDARDNational forewordThis British

2、Standard is the UK implementation of EN ISO2811-4:2011. It supersedes BS EN ISO 2811-4:2001 which iswithdrawn.The UK participation in its preparation was entrusted to TechnicalCommittee STI/10, Test methods for paints.A list of organizations represented on this committee can beobtained on request to

3、 its secretary.This publication does not purport to include all the necessaryprovisions of a contract. Users are responsible for its correctapplication. BSI 2011ISBN 978 0 580 66284 3ICS 87.040Compliance with a British Standard cannot confer immunity fromlegal obligations.This British Standard was p

4、ublished under the authority of theStandards Policy and Strategy Committee on 31 March 2011.Amendments issued since publicationDate Text affectedEUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN ISO 2811-4 March 2011 ICS 87.040 Supersedes EN ISO 2811-4:2001English Version Paints and varnishes - D

5、etermination of density - Part 4: Pressure cup method (ISO 2811-4:2011) Peintures et vernis - Dtermination de la masse volumique - Partie 4: Mthode du cylindre sous pression (ISO 2811-4:2011) Beschichtungsstoffe - Bestimmung der Dichte - Teil 4: Druckzylinder-Verfahren (ISO 2811-4:2011) This Europea

6、n 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 bibliographical references con

7、cerning 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 responsibility of a CEN member i

8、nto 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, Greece, Hungary, Iceland, Ire

9、land, 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 Management Centre: Avenue Marnix

10、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 2811-4:2011: EBS EN ISO 2811-4:2011EN ISO 2811-4:2011 (E) 3 Foreword This document (EN ISO 2811-4:2011) has been prepared by Technical Committee ISO/TC 35

11、 “Paints and varnishes“ in collaboration with Technical Committee CEN/TC 139 “Paints and 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 Septemb

12、er 2011, and conflicting national standards shall be withdrawn at the latest by September 2011. Attention is drawn to the possibility that some of the elements 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 paten

13、t rights. This document supersedes EN ISO 2811-4:2001. According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finl

14、and, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and the United Kingdom. Endorsement notice The text of ISO 2811-4:2011 has been approved by CEN as a EN

15、 ISO 2811-4:2011 without any modification. BS EN ISO 2811-4:2011ISO 2811-4:2011(E) ISO 2011 All rights reserved iiiContents Page Foreword iv 1 Scope1 2 Normative references1 3 Terms and definitions .1 4 Principle .1 5 Temperature.2 6 Apparatus.2 7 Sampling 2 8 Procedure.2 8.1 General .2 8.2 Determin

16、ation 2 9 Calculation .4 10 Precision 4 10.1 General .4 10.2 Repeatability limit, r 4 10.3 Reproducibility limit, R4 11 Test report4 Annex A (normative) Calibration of pressure cup.6 Annex B (informative) Temperature variation8 BS EN ISO 2811-4:2011ISO 2811-4:2011(E) iv ISO 2011 All rights reservedF

17、oreword 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 a te

18、chnical 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 matters

19、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 circulated

20、 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 responsible f

21、or identifying any or all such patent rights. ISO 2811-4 was prepared by Technical Committee ISO/TC 35, Paints and varnishes, Subcommittee SC 9, General test methods for paints and varnishes. This second edition cancels and replaces the first edition (ISO 2811-4:1997), which has been technically rev

22、ised. The main changes are: a) The unit for the density has been changed from grams per millilitre to grams per cubic centimetre, because this is the more common SI unit. b) The determination in duplicate has been changed to a single determination. c) The normative references have been updated. ISO

23、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) method Part 3: Oscillation method Part 4: Pressure cup method BS EN ISO 2811-4:2011INTERNATIONAL STANDARD ISO 2811-4:2011(E) ISO 2011

24、 All rights reserved 1Paints and varnishes Determination of density Part 4: Pressure cup method 1 Scope This part of ISO 2811 specifies a method for determining the density of paints, varnishes and related products using a pressure cup. The method is suitable for products which are aerated. Emulsion

25、 paints, for example, often trap small air bubbles, and these might still be present when the density is measured. It is not, however, suitable for textured paints which contain coarse particles. 2 Normative references The following referenced documents are indispensable for the application of this

26、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 3696, Water for analytical laboratory use Specifica

27、tion and test methods ISO 15528, Paints, 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 This is expressed in gra

28、ms per cubic centimetre. 4 Principle The product under test is compressed in a cylindrical pressure cup to reduce any error due to air bubbles which have not been eliminated. The density is calculated from the mass of the product and the volume of the cylinder. NOTE Air is more soluble at higher pre

29、ssures, and it is thought that the main mechanism of bubble removal is by dissolving. Any undissolved bubbles are compressed to a fraction of their original size. BS EN ISO 2811-4:2011ISO 2811-4:2011(E) 2 ISO 2011 All rights reserved5 Temperature The effect of temperature on density is highly signif

30、icant with respect to filling properties, and varies with the type of product. Carry out the test at (23,0 0,5) C. NOTE For some purposes, a different temperature, for example (20,0 0,5) C, might be needed. The test sample and pressure cup shall be conditioned to the specified or agreed temperature,

31、 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 Pressure cup, comprising a hollow cylinder closed by a screw-driven piston at its lower end and by a pressure-releas

32、e cap at the top (see Figure 1). A calibration collar on the screw is set to stop further movement of the piston when the volume contained in the cylinder is 100 cm3. The pressure-release cap is designed to let liquid escape when the pressure in the cylinder rises above (1,0 0,1) MPa (10 bar). The a

33、pparatus is made of a strong, inert material, for example stainless steel, and it is easily dismantled for cleaning. 6.2 Thermometer, accurate to 0,2 C and graduated at intervals of 0,2 C or finer. 6.3 Temperature-controlled chamber, capable of maintaining the pressure cup and sample at the specifie

34、d or agreed temperature (see Clause 5). 6.4 Balance, accurate to 10 mg. 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 samp

35、le. 8.2 Determination Weigh the dismantled apparatus, ensure that it is clean and has a trace of grease on the moving parts. Fit the piston in its lowest position in the cylinder. Weigh the complete apparatus to the nearest 10 mg (m1). Bring the apparatus and the test sample to the specified or agre

36、ed temperature by placing it next to the balance for at least 30 min. Pour the test sample into the cylinder until it is almost full, and allow sufficient time for the test sample and the cylinder to come to equilibrium at the test temperature. Confirm that the temperature is correct using the therm

37、ometer (6.2). Secure the pressure-release cap in position, in accordance with the manufacturers instructions. BS EN ISO 2811-4:2011ISO 2811-4:2011(E) ISO 2011 All rights reserved 3Key 1 pressure-setting handle 6 piston seal 2 pressure-release device 7 piston 3 end cap 8 calibration-collar stop 4 end

38、 seal 9 pressure-application handle 5 cylinder (closed volume 100 cm3) Figure 1 Pressure cup Compress the test sample by turning the screw. As the pressure reaches about 1 MPa, excess paint is forced out between the cylinder and the cap. Continue turning the screw until the calibration collar stops

39、further movement. NOTE A rag held around the top of the cylinder reduces the mess. It is essential that some excess paint is forced out, to confirm that full pressure is achieved. Clean and dry the outside of the filled cup, and weigh it to the nearest 10 mg (m2). Unscrew the piston enough to reduce

40、 the pressure. Dismantle, empty and clean the apparatus. BS EN ISO 2811-4:2011ISO 2811-4:2011(E) 4 ISO 2011 All rights reservedFor reference tests, and periodically during routine tests, check the calibration of the apparatus, using pure water as the test liquid (see Annex A). 9 Calculation Calculat

41、e the density, , of the product, in grams per cubic centimetre, at the test temperature, tT, using Equation (1): 21tmmV= (1) where m1is the mass, in grams, of the empty pressure cup; m2is the mass, in grams, of the pressure cup filled with the product at the test temperature, tT; Vtis the volume, in

42、 cubic centimetres, of the pressure cup at the test temperature, tT, determined in accordance with Annex A. NOTE The result is not corrected for air buoyancy because the uncorrected value is required by most filling-machine control procedures and the correction (0,001 2 g/cm3) is negligible in relat

43、ion to the precision of the method. If the test temperature used is not the reference temperature, the density can be calculated using Equation (B.2). 10 Precision 10.1 General The precision of the method depends on the characteristics of the product under test. For materials which contain no entrap

44、ped 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 using the same equipment within a short interval of time using the standardized

45、test method, may be expected to lie, with a 95 % probability, is 0,005 g/cm3. 10.3 Reproducibility limit, R No data are currently available. 11 Test report The test report shall include at least the following information: a) all details necessary to identify the product tested; b) a reference to thi

46、s part of ISO 2811, i.e. ISO 2811-4:2011; c) the supplier and serial number or other identification of the pressure cup; d) the test temperature; BS EN ISO 2811-4:2011ISO 2811-4:2011(E) ISO 2011 All rights reserved 5e) the result of the density measurement, in grams per cubic centimetre, rounded to

47、the nearest 0,001 g/cm3; f) any deviation from the test method specified; g) any unusual features (anomalies) observed during the test; h) the date of the test. BS EN ISO 2811-4:2011ISO 2811-4:2011(E) 6 ISO 2011 All rights reservedAnnex A (normative) Calibration of pressure cup A.1 General Put the p

48、ressure cup in a container next to the balance in order for it to reach room temperature (approximately 30 min), then weigh using the balance and record this mass (m1). Almost fill the pressure cup with distilled or deionized water of grade 2 purity, as defined in ISO 3696, which has been previously

49、 boiled and then brought to a temperature of not more than 1 C below the test temperature. Secure the pressure-release cap in position, in accordance with the manufacturers instructions. Place the pressure cup in the temperature-controlled chamber and wait until the test temperature is reached, then compress the water by turning the screw. Continue until the calibration collar stops further movement, and wipe off any excess water with an absorbent material (cloth or paper), leaving the pressure cup exactly f