1、BRITISH STANDARD BS EN ISO 3262-3:1998 Extenders for paints Specifications and methods of test Part 3: Blanc fixe The European Standard EN ISO 3262-3:1998 has the status of a British Standard ICS 87.060.10BSENISO3262-3:1998 This British Standard, having been prepared under the directionof the Sector
2、 Board forMaterials and Chemicals, waspublished under the authorityof the Standards Boardand comes into effect on 15 October 1998 BSI 04-1999 ISBN 0 580 30495 7 National foreword This British Standard is the English language version of EN ISO 3262-3:1998. It is identical with ISO 3262-3:1998. Togeth
3、er with the other Parts of BSENISO 3262, it will supersede BS 1795:1976 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 the responsible inter
4、national/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 obtained on request to its
5、 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 or European publicat
6、ions 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 the necessary provisi
7、ons 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, theEN ISO title pa
8、ge, page 2, the ISO title page, pages ii to iv, pages 1 to 4 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 since publication Amd. No. Date Comme
9、ntsBSENISO3262-3:1998 BSI04-1999 i Contents Page National foreword Inside front cover Foreword 2 Foreword iii Text of ISO 3262-3 1ii blankEUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN ISO 3262-3 July 1998 ICS 87.060.10 Descriptors: See ISO document English version Extenders for paints Specifi
10、cations and methods of test Part 3: Blanc fixe (ISO 3262-3:1998) Matires de charge pour peintures Spcifications et mthodes dessai Partie 3: Blanc fixe (ISO 3262-3:1998) Fllstoffe fr Beschichtungsstoffe Anforderungen und Prfverfahren Teil 3: Blanc fixe (ISO 3262-3:1998) This European Standard was app
11、roved by CEN on 21 June 1998. 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 concerning such national
12、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 any other language made by translation under the responsibility of a CEN member into its own language and notifie
13、d to the Central Secretariat has the same status 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, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and
14、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 rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN
15、ISO 3262-3:1998 EENISO3262-3:1998 BSI04-1999 2 Foreword The text of the International Standard ISO 3262-3:1998 has been prepared by Technical Committee ISO/TC 35 “Paints and varnishes” in collaboration with Technical Committee CEN/TC298 “Pigments and extenders”, the secretariat of which is held by D
16、IN. 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 January 1999, and conflicting national standards shall be withdrawn at the latest by January 1999. According to the CEN/CENELEC Internal Regulat
17、ions, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, CzechRepublic, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and the Unit
18、ed Kingdom. Endorsement notice The text of the International Standard ISO3262-3:1998 has been approved by CEN as a European Standard without any modification. NOTENormative references to International Standards are listed in Annex ZA (normative).ENISO 3262-3:1998 ii BSI 04-1999 Contents Page Forewor
19、d iii 1 Scope 1 2 Normative references 1 3 Definition 1 4 Requirements and test methods 1 5 Sampling 2 6 Determination of BaSO 4content 2 7 Test report 3 Annex ZA (normative) Normative references to international publications with their relevant European publications 4 Table 1 Essential requirements
20、 1 Table 2 Conditional requirements 2ENISO3262-3:1998 BSI 04-1999 iii Foreword 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 techni
21、cal committees. 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. ISO collaborates closely w
22、ith the International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization. Draft International 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
23、 the member bodies casting a vote. International Standard ISO 3262-3 was prepared by Technical Committee ISO/TC35, Paints and varnishes, Subcommittee SC2, Pigments and extenders. Together with the other parts (see below), this part of ISO 3262 cancels and replaces ISO 3262:1975, which has been techn
24、ically revised. Part 1 comprises the definition of the term extender and a number of test methods that are applicable 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 part
25、s of ISO 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; Part 4: Whiting; Part 5: Natural crystalline calcium carbonate;
26、 Part 6: Precipitated calcium carbonate; Part 7: Dolomite; Part 8: Natural clay; Part 9: Calcined clay; Part 10: Natural 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: Cristobali
27、te; Part 15: Vitreous silica; Part 16: Aluminium hydroxides; Part 17: Precipitated calcium silicate; Part 18: Precipitated sodium aluminium silicate; Part 19: Precipitated silica; Part 20: Fumed silica; Part 21: Silica sand (unground natural quartz); Part 22: Diatomaceous earth (kieselguhr). Descrip
28、tors: Paints, extenders, barium sulphate, specifications, materials specifications, tests.iv blankENISO3262-3:1998 BSI04-1999 1 1 Scope This part of ISO3262 specifies requirements and corresponding methods of test for blanc fixe. 2 Normative references The following standards contain provisions whic
29、h, through reference in this text, constitute provisions of this part of ISO3262. At the time of 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 th
30、e most recent editions of the standards indicated below. Members of IEC and ISO maintain registers 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
31、 for pigments and extenders Part 3: Determination of matter soluble in water Hot extraction method. ISO 787-5:1980, General methods of test for pigments and extenders Part 5: Determination of oil absorption value. ISO 787-7:1981, General methods of test for pigments and extenders Part 7: Determinati
32、on 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 methods of test for pigments Part 14: Determination of resistivity of aqueous extract. ISO 842
33、: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 laboratory use Specification and test methods. ISO 4793:1980, Laboratory sintered (fritted
34、) filters Porosity grading, classification and designation. 3 Definition For the purposes of this part of ISO 3262, the following definition applies: 3.1 blanc fixe synthetic (as opposed to naturally occurring) barium sulfate, produced by a precipitation process 4 Requirements and test methods For b
35、lanc fixe complying with this part of ISO3262, the essential requirements are specified in Table 1 and the conditional requirements are listed in Table 2. Table 1 Essential requirements Characteristic Unit Requirement Test method BaSO 4content, min. % (m/m) 95 See clause 6 Residue on 45 4m sieve, ma
36、x. % (m/m) 0,2 ISO 787-7 a Matter volatile at 105 C, max. % (m/m) 0,5 b ISO 787-2 c Loss on ignition, max. % (m/m) 3 b ISO 3262-1 Matter soluble in water, max. % (m/m) 0,5 ISO 787-3 pH value of aqueous suspension 6 to 10 ISO 787-9 a But using a brush to obtain reproducible results. b For ultra-fine
37、and surface-treated types, higher values are possible. The requirements for these types shall therefore be agreed between the interested parties. c By agreement between the interested parties, test portions other than 10 g may be used.ENISO3262-3:1998 2 BSI04-1999 Table 2 Conditional requirements 5
38、Sampling Take a representative sample of the product to be tested, as described in ISO842. 6 Determination of BaSO 4content 6.1 General For precipitated barium sulfate, the acid-insoluble barium compounds, calculated as barium sulfate, are taken as the BaSO 4content. 6.2 Reagents Use only reagents o
39、f recognized analytical grade and only water of at least grade3purity as defined in ISO3696. 6.2.1 Hydrochloric acid, concentrated, approximately37% (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) to3parts by volume of water.
40、 6.2.3 Sulfuric acid, diluted1+9. Add1part by volume of concentrated sulfuric acid approximately96% (m/m), . 1,84 g/ml slowly to9parts by volume of water. 6.2.4 Sodium carbonate solution, 10 g/l. Dissolve 1g of anhydrous sodium carbonate in100ml of water. 6.2.5 Fusion mixture. Mix equal parts by mas
41、s 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-silica filter crucible, pore size index P16 (pore diameter104m to164m) as defined in ISO4793. 6.3.3 Air oven, c
42、apable of being maintained at (105 2) C. 6.3.4 Muffle furnace. 6.4 Procedure Weigh 5g of the fusion mixture (6.2.5) into the platinum crucible (6.3.1). Add approximately 1 g (m 0 ), weighed to the nearest1mg, of the test sample, previously dried in accordance with ISO787-2. Mix well and place a furt
43、her1g of the fusion mixture on top of the mixture in the crucible. Heat the crucible, 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 a 600 ml beaker (A) and place into it the crucible and lid. Heat gently for1
44、5min 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. Measure95ml of wate
45、r and5ml of concentrated hydrochloric acid (6.2.1) into a second600ml beaker (B) and put the crucible and lid into it. Allow the aqueous fusion extract in beaker A to settle on a warm surface for 30min. Decant the hot solution through a125mm fine-textured ashless filter paper. Wash the precipitate t
46、hree times by decantation, using10ml portions of hot sodium carbonate solution (6.2.4) and transfer to the filter paper. Repeat the washing three times with5ml portions of sodium carbonate solution and discard the washings. Characteristic Unit Requirement Test method Particle size distribution (inst
47、rumental method) % (m/m) To be agreed between the interested parties a Colour To be agreed between the interested parties ISO 3262-1 Lightness To be agreed between the interested parties b Oil absorption value g/100 g ISO 787-5 Resistivity of aqueous extract 7m ISO 787-14 a A general description of
48、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: Determination of the particle size distribution. b Test method in preparation.ENISO3262-3:1998 BSI04-1999 3 Remove the crucible and lid from the acid solut
49、ion in beaker B and wash down with water into the beaker. Transfer this solution to beaker A, in which the melt was extracted, and add to it the filter paper and residue. Cover the beaker with a watch glass, boil for5min and then filter through a125mm filter paper into beaker B, which originally contained the acid solution. Wash the filter papers thoroughly six times with10ml portions of hot water. Transfer the filter papers to the platinum crucib
