1、BRITISH STANDARD BS EN ISO 3262-2:1998 Extenders for paints Specifications and methods of test Part 2: Barytes (natural barium sulfate) The European Standard ENISO 3262-2:1998 has the status of a British Standard ICS 87.060.10BSEN ISO 3262-2:1998 This British Standard, having been prepared under the
2、 directionof the Sector Board forMaterials and Chemicals, waspublished under the authorityof the Standards Boardand comes into effect on 15 September1998 BSI 04-1999 ISBN 0 580 30494 9 National foreword This British Standard is the English language version of ENISO3262-2:1998. It is identical with I
3、SO3262-2:1998. Together with the other Parts of BSENISO3262, it will supersede BS1795:1976 which is declared obsolescent. The UK participation in its preparation was entrusted to Technical Committee STI/1, Pigments, which has the responsibility to: aid enquirers to understand the text; present to th
4、e responsible international/European committee any enquiries on the interpretation, or proposals for change, and keep the UK interests informed; monitor related international and European developments and promulgate them in the UK. A list of organizations represented on this committee can be obtaine
5、d on request to its secretary. Cross-references Attention is drawn to the fact that CEN and CENELEC standards normally include an annex which lists normative references to international publications with their corresponding European publications. The British Standards which implement international o
6、r European publications referred to in this document may be found in the BSI Standards Catalogue under the section entitled “International Standards Correspondence Index”, or by using the “Find” facility of the BSI Standards Electronic Catalogue. A British Standard does not purport to include all th
7、e necessary provisions of a contract. Users of British Standards are responsible for their correct application. Compliance with a British Standard does not of itself confer immunity from legal obligations. Summary of pages This document comprises a front cover, an inside front cover, pages i and ii,
8、 theEN ISO title page, page 2, the ISO title page, pages ii to iv, pages1 to4, aninsideback cover and aback cover. This standard has been updated (see copyright date) and may have had amendments incorporated. This will be indicated in the amendment table on the inside front cover. Amendments issued
9、since publication Amd. No. Date CommentsBSEN ISO 3262-2:1998 BSI 04-1999 i Contents Page National foreword Inside front cover Foreword 2 Foreword iii Text of ISO 3262-2 1ii blankEUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN ISO 3262-2 July 1998 ICS 87.060.10 Descriptors: See ISO document Engl
10、ish version Extenders for paints Specifications and methods of test Part 2: Baryte (natural barium sulfate) (ISO 3262-2:1998) Matires de charge pour peintures Spcifications et mthodes dessai Partie 2: Barytine (sulfate de baryum naturel) (ISO 3262-2:1998) Fllstoffe fr Beschichtungsstoffe Anforderung
11、en und Prfverfahren Teil 2: Schwerspat (natrliches Bariumsulfat) (ISO 3262-2:1998) This European Standard was approved by CEN on21 June1998. 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 nati
12、onal standard without any alteration. Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the Central Secretariat or to any CEN member. This European Standard exists in three official versions (English, French, German). A version in an
13、y 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 status as the official versions. CEN members are the national standards bodies of Austria, Belgium, CzechRepublic, Denmark, Finland, France, German
14、y, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom. CEN European Committee for Standardization Comit Europen de Normalisation Europisches Komitee fr Normung Central Secretariat: rue de Stassart 36, B-1050 Brussels 1998 CEN All
15、 rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN ISO 3262-2:1998 EEN ISO 3262-2:1998 BSI 04-1999 2 Foreword The text of the International Standard ISO 3262-2:1998 has been prepared by Technical Committee ISO/TC 35 “Paints and varnishes” in
16、 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 national standard, either by publication of an identical text or by endorsement, at the latest by January1999, and conflicting n
17、ational standards shall be withdrawn at the latest by January1999. According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Gr
18、eece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and the United Kingdom. Endorsement notice The text of the International Standard ISO3262-2:1998 has been approved by CEN as a European Standard without any modification. NOTENormative references to
19、International Standards are listed inAnnex ZA (normative).ENISO 3262-2:1998 ii BSI 04-1999 Contents Page Foreword iii 1 Scope 1 2 Normative references 1 3 Definition 1 4 Requirements and test methods 1 5 Sampling 1 6 Determination of BaSO 4content 1 7 Determination of matter soluble in hydrochloric
20、acid 3 8 Test report 4 Annex ZA (normative) Normative references to international publications with their relevant European publications Inside back cover Table 1 Essential requirements 1 Table 2 Conditional requirements 2ENISO3262-2:1998 BSI 04-1999 iii Foreword ISO (the International Organization
21、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 technical committee has been established has t
22、he 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 of electrotechnical standardization. Draft I
23、nternational Standards adopted by the technical committees are circulated to the member bodies for voting. Publication as an International Standard requires approval by at least75% of the member bodies casting a vote. International Standard ISO3262-2 was prepared by Technical Committee ISO/TC 35, Pa
24、ints and varnishes, Subcommittee SC 2, Pigments and extenders. Together with the other parts (see below), this part of ISO3262 cancels and replaces ISO3262:1975, which has been technically revised. Part1 comprises the definition of the term extender and a number of test methods that are applicable t
25、o most extenders, whilst part2 and the following parts specify requirements and, where appropriate, particular test methods for individual extenders. At present, the following parts of ISO3262 are published or in preparation, under the general title Extenders for paints Specifications and methods of
26、 test: Part 1: Introduction and general test methods; Part 2: Barytes (natural barium sulfate); Part 3: Blanc fixe; Part 4: Whiting; Part 5: Natural crystalline calcium carbonate; Part 6: Precipitated calcium carbonate; Part 7: Dolomite; Part 8: Natural clay; Part 9: Calcined clay; Part 10: Natural
27、talc/chlorite in lamellar form; Part 11: Natural talc, in lamellar form, 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: Precipitate
28、d sodium aluminium silicate; Part 19: Precipitated silica; Part 20: Fumed silica; Part 21: Silica sand (unground natural quartz); Part 22: Diatomaceous earth (kieselguhr). Descriptors: Paints, extenders, barium sulphate, specifications, materials specifications, tests.iv blankEN ISO 3262-2:1998 BSI
29、04-1999 1 1 Scope This part of ISO3262 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 ISO3262. At the time of
30、publication, the editions indicated were valid. All standards are subject to revision, and parties to agreements based on this part of ISO3262 are encouraged to investigate the possibility of applying the most recent editions of the standards indicated below. Members of IEC and ISO maintain register
31、s of currently valid International Standards. ISO 787-2:1981, General methods of test for pigments and extenders Part 2: Determination of matter volatile at 105 C. ISO 787-3:1979, General methods of test for pigments and extenders Part 3: Determination of matter soluble in water Hot extraction metho
32、d. ISO 787-7:1981, General methods of test for pigments and extenders Part 7: Determination of residue on sieve Water method Manual procedure. ISO 787-9:1981, General methods of test for pigments and extenders Part 9: Determination of pH value of an aqueous suspension. ISO 787-14:1973, General metho
33、ds of test for pigments Part 14: Determination of resistivity of aqueous extract. ISO 842:1984, Raw materials for paints and varnishes Sampling. ISO 3262-1:1997, Extenders for paints Specifications and methods of test Part1:Introduction and general test methods. ISO 3696:1987, Water for analytical l
34、aboratory use Specification and test methods. ISO 4793:1980, Laboratory sintered (fritted) filters Porosity grading, classification and designation. 3 Definition For the purposes of this part of ISO3262, the following definition applies: 3.1 barytes naturally occurring barium sulfate, BaSO 4 4 Requi
35、rements and test methods For barytes complying with this part of ISO3262, the essential requirements are specified inTable 1 and the conditional requirements are listed in Table 2. 5 Sampling Take a representative sample of the product to be tested, as described in ISO842. 6 Determination of BaSO 4c
36、ontent 1) 6.1 General For barytes, the acid-insoluble barium, calculated as barium sulfate, is taken as the BaSO 4content. 6.2 Reagents Use only reagents of recognized analytical grade and only water of at least grade3purity as defined in ISO3696. 6.2.1 Hydrochloric acid, concentrated, approximately
37、37%(m/m), . 1,19 g/ml. 6.2.2 Hydrochloric acid, diluted 1 + 3. Add 1 part by volume of concentrated hydrochloric acid(6.2.1) to 3 parts by volume of water. Table 1 Essential requirements 1) This determination includes strontium sulfate. Characteristic Unit Requirement Test method Grade A Grade B BaS
38、O 4content, min. % (m/m) 90 80 See clause6 Residue on 45 4m sieve, max. % (m/m) 0,5 See Table 2 ISO 787-7 Matter volatile at 105 C, max. % (m/m) 0,5 ISO 787-2 a Loss on ignition, max. % (m/m) 1 SeeTable 2 ISO 3262-1 Matter soluble in water, max. ISO 787-3 pH value of aqueous suspension 6 to 10 ISO 7
39、87-9 a By agreement between the interested parties, test portions other than 10 g may be used.EN ISO 3262-2:1998 2 BSI 04-1999 Table 2 Conditional requirements 6.2.3 Hydrochloric acid, diluted 1 + 100. Add1 part by volume of concentrated hydrochloric acid(6.2.1) to100parts by volume of water. 6.2.4
40、Sulfuric acid, diluted 1 + 9. Add 1 part by volume of concentrated sulfuric acid approximately 96% (m/m), . 1,84 g/ml slowly to9parts by volume of water. 6.2.5 Ammonia solution, diluted 1 + 3. Add 1 part by volume of concentrated ammonia solution approximately 32%(m/m), . 0,880g/ml to 3 parts by vol
41、ume of water. 6.2.6 Bromine water, saturated solution. 6.2.7 Sodium carbonate solution, 10 g/l. Dissolve 1 g of anhydrous sodium carbonate in100 ml of water. 6.2.8 Hydroxylammonium chloride solution, 50 g/l. 6.2.9 Fusion mixture Mix equal parts by mass of sodium carbonate and potassium carbonate. 6.
42、3 Apparatus Use ordinary laboratory apparatus and glassware, together with the following: 6.3.1 Platinum crucible, with lid. 6.3.2 Sintered-silica filter crucible, pore size index P16 (pore diameter 10 4m to 16 4m) as defined in ISO4793. 6.3.3 Air oven, capable of being maintained at (105 2) C. 6.3.
43、4 Muffle furnace. 6.4 Procedure Weigh, to the nearest1mg, approximately1g (m 0 ) of the test sample, previously dried in accordance with ISO787-2, into a400ml beaker. Add 100ml of1+100 hydrochloric acid (6.2.3) and allow to stand for1h at room temperature, with occasional stirring. Filter through a1
44、25mm fine-textured ashless filter paper and wash once with10ml of hot water. Transfer the filter paper to the platinum crucible(6.3.1), dry and ignite. Add5g of the fusion mixture (6.2.9), mix well, and then place a further1g of the fusion mixture on top of the mixture in the crucible. Heat the cruc
45、ible, fitted with its lid, at bright-red heat (800 C to900 C) for15min. Then allow the crucible and lid to cool. Measure100ml of hot water into a600ml beaker (A) and place into it the crucible and lid. Heat gently for15min to extract the melt, then, using clean nickel or other suitable tongs, remove
46、 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. Measure95ml of water and5ml of concentrated hydrochloric acid (6.2.1) into a second 600 ml beaker (B)
47、 and put the crucible and lid into it. Characteristic Unit Requirement Test method Grade A Grade B Residue on 45 4m sieve % (m/m) See Table 1 To be agreed between the interested parties ISO 787-7 Particle size distribution (instrumental method) % (m/m) To be agreed between the interested parties a C
48、olour To be agreed between the interested parties ISO 3262-1 Lightness To be agreed between the interested parties b Loss on ignition % (m/m) See Table 1 To be agreed between the interested parties ISO 3262-1 Matter soluble in water ISO 787-3 Resistivity of aqueous extract 7m To be agreed between th
49、e interested parties ISO 787-14 Matter soluble in hydrochloric acid % (m/m) See clause7 a A general description of a sedimentation method using X-ray absorption is given in EN725-5:1996, Advanced technical ceramics Methods of test for ceramic powders Part 5: Determination of the particle size distribution. b Test method in preparation.EN ISO 3262-2:1998 BSI 04-1999 3 Allow the aqueous fusion extract in beaker A to settle on a warm surface for30mi
