1、BRITISH STANDARD Extenders for paints - Specifications and methods of test - Part 2: Barytes (natural barium sulfate) The European Standard EN IS0 3262-2 1998 has the status of a British Standard ICs 87.060.10 NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAW BS EN IS0 3262-2: 1
2、998 STD-ES1 BS EN IS0 3262-2-ENGL 1998 1624669 0720816 895 = Amd. No. Date BS EN IS0 3262-2:1998 Text affected This British Standard, having been prepared under the direction of the Sector Board for Materiais and Chemicals, was published under the authoriw of the Standards Board and comes into effec
3、t on 15 September 1998 O BSI 1998 National foreword This British Standard is the English language version of EN IS0 3262-2:1998. It is identical with IS0 3262-2:1998. Together with the other Parts of BS EN IS0 3262, it will supersede BS 17951976 which is declared obsolescent. The UK participation in
4、 its preparation was entrusted to Technical Committee STI/l, Pigments, which has the responsibility to: - aid enquirem to understand the text, - present to the responsible international/European committee any enquiries on the interpretation, or proposais for change, and keep the UK interests informe
5、d; - monitor related international and European developments and promulgate them in the UK. A list of organizations represented on this committee can be obtahed on request to its secretary. Cross-references Attention is dram to the fact that CEN and CENELEC standards normally include an annex which
6、lists normative references to international publications with their corresponding European publications. The British Standards which implement international or European publications referred to in this document may be found in the BSI Standards Catalogue under the section entitled “International Sta
7、ndards Correspondence Index“, or by using the “Find“ facility of the BSI Standards Electronic Catalogue. A British Standard does not purport to include all the necessary provisions of a conimct. Users of British Standards are responsible for their correct application. Compliance with a British Stand
8、ard does not of itself confer immunity from legal obligations. Summary of pages This document comprises a front cover, an inside front cover, the EN IS0 title page, the EN IS0 foreword page, the IS0 title page, pages ii and iii, a blank page, pages 1 to 6, the annex ZA page and a back cover. ISBN O
9、680 30494 9 EUROPEAN SANDARD NORME EUROPENNE EUROPISCHE NORM EN IS0 3262-2 July 1998 - ICs 87.060.10 Descriptors: see IS0 document English version Extenders for paints - Specifications and methods of test - Patt 2: Baryte (natural barium sulfate) (IS0 3262-2:1998) Matibres de charge pour peintures -
10、 Spcffications et mthodes dessai - Partie 2: Barytine (sulfate de baryum naturel) (IS0 3262-21998) Fllstoffe fr Beschshtungsstoffe - Anforderungen und Prfverfahren - Teil 2 Schwerspat (natrliches Bariumsulfat) (IS0 3262-2:1998) This European Standard was approved by CEN on 21 June 1998. CEN members
11、are bound to comply with the CENKENELEC 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 concerning such national standards may be obtained on application to
12、 the Centrai 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 translation under the responsibility of a CEN member into its own language and notified to the Central Secretariat has the same s
13、tatus as the official versions. CEN members are the national standards bodies of Austria, Belgium, Czech Republic, Denmark. Finland, France, Germany, Greece, Iceland, Ireland, Italy. Luxembourg, Nethetiands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom. EUROPEAN COMMEE FOR STANDAR
14、DIZATION EUROPISCHES KOMITEE FOR NORMUNG COMITB EUROPEEN DE NORMALISATION Ceniml Secretariat: rue de Stassart, 36 B-1050 Brumeds Q 1998 CEN All rights of exploitation in any form and by any means resewed worldwide for CEN national Members. Ref. No. EN IS0 3262-2:1998 E EN IS0 3262-21998 Foreword The
15、 text of the International Standard IS0 3262-2:1998 has been prepared by Technical Committee ISO/TC 35 “Paints and varnishes“ in collaboration with Technical Committee CEN/TC 298 “Pigments and extenders“, the secretariat of which is held by DIN. This European Standard shall be given the status of a
16、national standard, either by publication of an identical text or by endorsement, at the latest by January 1999, and conflicting national standards shall be withdrawn at the latest by January 1999. According to the CENKENELEC Internal Regulations, the national standards organizations of the following
17、 countries are bound to implement this European Standard: Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and the United Kingdom. Endorsement notice The text of the Internation
18、al Standard IS0 3262-2: 1 998 has been approved by EN as a European Standard without any modification. NOTE: Normative references to International Standards are listed in annex ZA (normative). - - - STDmBSI ES EN IS0 32b2-2-ENGL 1998 = Lb246b9 0720819 5T4 m EN IS0 3262-2:1998 INTERNATIONAL STANDARD
19、IS0 3262-2 First edition 1998-07-01 Extenders for paints - Specifications and methods of test - Part 2: Barytes (natural barium sulfate) Matires de charge pour peintures - Spcifications et mthodes dessai - Partie 2: Barytine (sulfate de baryum naturel) Reference number IS0 3262-2:1998(E) STD-BSI BS
20、EN IS0 32b2-2-ENGL 1798 1ki24bb 0720820 2Lb EN IS0 3262-2:1998 Foreword IS0 (the Intemational Organization for Standardization) is a worldwide federation of national standards bodies (IS0 member bodies). The work of preparing International Standards is normally carried out through IS0 technical comm
21、ittees. Each member body interested in a subject for which 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. IS0 collaborates closely with the
22、International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization. Draft Intemational Standards adopted by the technical committees are circulated to the member bodies for voting. Publication as an International Standard requires approval by at least 75 % of the memb
23、er bodies casting a vote. International Standard IS0 3262-2 was prepared by Technical Committee ISO/TC 35, Paints and varnishes, Subcommittee SC 2, figments and extenders. Together with the other parts (see below), this part of IS0 3262 cancels and replaces IS0 3262:1975, which has been technically
24、revised. Part 1 comprises the definition of the tem extender and a number of test methods that are applicabie to most extenders, whilst part 2 and the following parts specify requirements and, where appropriate, particular test methods for individual extenders. At present, the .following parts of IS
25、0 3262 are published or in preparation, under the general title Extenders for paints - Specifications and methods of test: - Part 1 : Introduction and general test methods - Part 2: Barytes (natural barium sulfate) - Part 3: Blanc fixe - Patt 4: Whiting - Part 5: Natural crystalline calcium carbonat
26、e - Part 6: Pmiipitated calcium carbonate -Part 7: Dolomite - Part 8: Natural clay - Patt 9: Calcined clay 1 1 - Part 10: Natural taluichlotite in lamellar form Descriptors: paints, extenders, barium sulphate, specifications, materials specifications, tests. ii - Part 11: Natural talc, in lamellar f
27、orm, containing carbonates - Part 12: Muscovite-type mica - Part 13: Natural quartz (ground) - Part 14: Cristobalite - Part 15: Vitreous silica - Part 16: Aluminium hydroxides - Part 17: Precipitated calcium silicate - Part 18: Precipitated sodium aluminium silicate - Part 19: Precipitated silica -
28、Part 20: Fumed silica - Part 21: Silica sand (unground natural quartz) - Part 22: Diatomaceous earth (kieselguhr) iii STD-BSI BS EN IS0 3262-2-ENGL 1998 m Lb24bb9 0720822 099 = EN IS0 3262-2:1998 Extenders for paints - Specifications and methods of test - Part 2: Barytes (natural barium sulfate) 1 s
29、cope This part of IS0 3262 specifies requirements and corresponding methods of test for baryte (natural barium sulfate). 2 Normative references The following standards contain provisions which, through reference in this text, constitute provisions of this part of IS0 3262. At the time of publication
30、, the editions indicated were valid. Ail standards are subject to revision, and parties to agreements based on this part of IS0 3262 are encouraged to investigate the possibility of applying the most recent editions of the standards indicated below. Members of IEC and IS0 maintain registers of curre
31、ntly valid International - .I Standards. = E 105 “C. - IS0 787-21 981, General methods of test for pigments and extenderc - Part 2: Defemination of matter volatile at - II * * m IS0 787-3:1979, General methods of test for pigments and extenderc - Part 3: Detemination of matter soluble in water - Hot
32、 extraction method. IS0 787-7:1981, General methods of test for pigments and extenders - Part 7: Determination of residue on sieve - Water method - Manual pmedure. IS0 787-9:1981, General methods of test for pigments and extenders - Patt 9: Determination of pH value of an aqueous suspension. IS0 787
33、-1 4:1973, General methods of test for pigments - Part 74: Determination of resistivity of aqueous extract. IS0 842:1984, Raw mateflals for paints and varnishes - Sampling. IS0 3262-1:1997, Extenders for paints - Specifications and methods of test - Part 7: Introduction and general test methods. IS0
34、 3696:1987, Water for analytical laboratory use - Specification and test methods. IS0 4793:1980, Laboratory sintered (frited) filters - Poros grading, classification and designation. 3 Definition For the purposes of this part of IS0 3262, the following definition applies: 3.1 barytes: Naturally occu
35、rring barium sulfate, BaSO,. 1 4 Requirements and test methods For barytes complying with this part of IS0 3262, the essential requirements are specified in table 1 and the conditional requirements are listed in table 2. Unit % (dm) % (rtvm) % (rtvm) % (rtvm) Characteristic Requirement Test method G
36、rade B Grade A 90 80 See clause 6 0,s See table 2 IS0 787-7 095 IS0 787-2 IS0 3262-1 1 See table 2 IS0 787-3 6 to 10 IS0 787-9 BaSO, content, min. Residue on 45 pm sieve, max. Matter volatile at 105 “C. max. Loss on ignition, max. Matter soluble in water, max. pH value of aqueous suspension 1) By ag
37、reement between the interested parties, test portions other than 10 g may be used. 5 Sampling Take a representative sample of the product to be tested, as described in IS0 842. 6 Determination of BaSO, content 6.1 General For batytes, the acid-insoluble barium, calculated as barium sulfate, is taken
38、 as the BaSO, content. 6.2 Reagents Use only reagents of recognized analytical grade and only water of at least grade 3 purity as defined in IS0 3696. 6.2.1 Hydrochloric acid, concentrated, approximately 37 % (rtvm), p = 1,19 mi. 6.2.2 Hydrochloric acid, diluted 1 + 3. Add 1 part by volume of concen
39、trated hydrochloric acid (6.2.1) to 3 parts by volume of water. 6.2.3 Hydrochloric acid, diluted 1 + 100. Add 1 part by volume of concentrated hydrochloric acid (6.2.1) to 100 parts by volume of water. 1) This determination includes strontium sulfate. 2 STD.BSI BS EN IS0 32b2-2-ENGL 1778 Lb24Lb9 072
40、0824 961 EN IS0 3262-2:1998 Unit Yo (dm) Table 2 - Conditional requirements Requirement Test method Grade A Grade B See table 1 To be agreed IS0 787-7 between the interested Darties Characteristic % (dm) Residue on 45 pm sieve To be agreed between the interested parties“ Particle size distribution (
41、instrumental method) YO (dm) I Coiour See table 1 Lightness I e Loss on ignition Matter soluble in water Resistivity of aqueous extract I ISO3262-1 I To be agreed between the interested parties To be agreed between the interested parties I ISO3262-1 I Tobeagreed interested parties between the R,m I
42、I IS0 787-14 See clause 7 To be agreed between the interested YO (dm) parties Matter soluble in hydrochloric acid 1) A general description of a sedimentation method using X-ray absorption is given in EN 725-5:1996, Advanced technical ceramics - Methods of test for ceramic powders - Part 5: Determina
43、tion of the particle size distribution. 2) Test method in preparation. 6.2.4 Sulfuric acid, diluted 1 + 9. Add 1 part by volume of concentrated sulfuric acid approximately 96 % (Win), p = 1,84 mi slowly to 9 parts by volume of water. 6.2.5 Ammonia solution, diluted 1 + 3. Add 1 part by volume of con
44、centrated ammonia solution approximately 32 % (dm), p = 0,880 mi to 3 parts by volume of water. 6.2.6 Bromine water, saturated solution. 6.2.7 Sodium carbonate solution, 1 O l. Dissolve 1 g of anhydrous sodium carbonate in 100 ml of water. 6.2.8 Hydroxylammonium chloride solution, 50 g/l. 3 STD-BSI
45、BS EN IS0 32b2-2-ENGL 1998 E 1624669 0720825 8T8 EN IS0 3262-2:1998 6.2.9 Fusion mixture. Mix equal parts by mass of sodium carbonate and potassium carbonate. 6.3 Apparatus Use ordinary laboratory apparatus and glassware, together with the following: 6.3.1 Platinum crucible, with lid. 6.3.2 Sintered
46、-silica filter crucible, pore size index P 16 (pore diameter 1 O pm to 16 pm) as defined in IS0 4793. 6.3.3 Air oven, capable of being maintained at (1 05 f 2) OC. 6.3.4 Muffle furnace. 6.4 Procedure Weigh, to the nearest 1 mg, approximately 1 g (mo) of the test sample, previously dried in accordanc
47、e with IS0 787-2, into a 400 mi beaker. Add 100 mi of 1 + 100 hydrochloric acid (6.2.3) and allow to stand for 1 h at room temperature, with occasional stirring. Filter through a 125 mm fine-textured ashless filter paper and wash once with 10 ml of hot water. Transfer the filter paper to the platinu
48、m crucible (6.3.1), dry and ignite. Add 5 g of the fusion mixture (6.2.9), mix well, and then place a further 1 g of the fusion mixture on top of the mixture in the crucible. Heat the crmbie, fitted with its lid, at bright-red heat (800 OC to 900 OC) for 15 min. Then allow themcible and lid to cool.
49、 Measure 100 ml of hot water into a 600 ml beaker (A) and place into it the crucible and lid. Heat gently for 15 min to extract the melt, then, using clean nickel or other suitable tongs, remove the crucible and lid. Rinse the crucible and lid and tongs with water into the beaker. Remove any white residue from the crucible with a rubber-tipped glass stirring rod and rinse again with water. Measure 95 ml of water and 5 ml of concentrated hydrochloric acid (6.2.1) into a second 600 ml beaker (8) and put the crucible and lid into it. Allow th
