1、| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | BRITISH STANDARD BS EN ISO 3262-8:2000 The
2、 European Standard EN ISO 3262-8:1999 has the status of a British Standard ICS 87.060.10 NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAW Extenders for paints Specifications and methods of test Part 8: Natural clayThis British Standard, having been prepared under the direction
3、of the Sector Committee for Materials and Chemicals, was published under the authority of the Standards Committee and comes into effect on 15 February 2000 BSI 02-2000 ISBN 0 580 35863 1 BS EN ISO 3262-8:2000 Amendments issued since publication Amd. No. Date Comments National foreword This British S
4、tandard is the official English language version of EN ISO 3262-8:1999. It is identical with ISO 3262-8:1999. Together with other parts of BS EN ISO 3262, it will supersede BS 1795:1976 which is declared obsolescent. The UK participation in its preparation was entrusted to Technical Committee STI/1,
5、 Pigments, which has the responsibility to: aid enquirers to understand the text; present to the 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
6、promulgate them in the UK. A list of organizations represented on this committee can be obtained 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 t
7、heir corresponding European publications. The British Standards which implement these international or European publications 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 Ele
8、ctronic Catalogue. A British Standard does not purport to include all the 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
9、document comprises a front cover, an inside front cover, the EN ISO title page, the EN ISO foreword page, the ISO title page, pages ii to iv, pages 1 to 7, the annex ZA page, and inside back cover and a back cover. The BSI copyright notice displayed in this document indicates when the document was l
10、ast issued.EN ISO 3262-8:1999A Referencenumbe r ISO32628:1999(E) INTERNATIONAL STANDARD ISO 32628 Firstedition 19991001 ExtendersforpaintsSpecificationsand methodsoftest Part8: Naturalclay MatiresdechargepourpeinturesSpcificationsetmthodesdessai Partie8:Kaolinnaturel EN ISO 3262-8:1999)E(9991:82623O
11、SI ii Contents 1Scop e1 2Normativereference s1 3Termanddefinitio n.2 4Requirementsandtestmethod s2 5Samplin g.3 6Determinationofparticlesizedistribution 3 7Testrepor t6 EN ISO 3262-8:1999OSI )E(9991:82623OSI iii Foreword ISO(theInternationalOrganizationforStandardization)isaworldwidefederationofnati
12、onalstandardsbodies(ISO memberbodies).TheworkofpreparingInternationalStandardsisnormallycarriedoutthroughISOtechnical committees.Eachmemberbodyinterestedinasubjectforwhichatechnicalcommitteehasbeenestablishedhas therighttoberepresentedonthatcommittee.Internationalorganizations,governmentalandnongove
13、rnmental,in liaisonwithISO,alsotakepartinthework.ISOcollaboratescloselywiththeInternationalElectrotechnical Commission(IEC)onallmattersofelectrotechnicalstandardization. InternationalStandardsaredraftedinaccordancewiththerulesgivenintheISO/IECDirectives,Part3. DraftInternationalStandardsadoptedbythe
14、technicalcommitteesarecirculatedtothememberbodiesforvoting. PublicationasanInternationalStandardrequiresapprovalbyatleast75%ofthememberbodiescastingavote. InternationalStandardISO 32628waspreparedbyTechnicalCommitteeISO/TC 35, Paintsandvarnishes , SubcommitteeSC2, Pigmentsandextenders . Togetherwith
15、theotherparts(seebelow),thispartofISO3262cancelsandreplacesISO3262:1975,whichhas beentechnicallyrevised.Part1comprisesthedefinitionofthetermextenderandanumberoftestmethodsthatare applicabletomostextenders,whilstpart2andthefollowingpartsspecifyrequirementsand,whereappropriate, particulartestmethodsfo
16、rindividualextenders. Atpresent,thefollowingpartsofISO3262arepublishedorinpreparation,underthegeneraltitle Extendersfor paintsSpecificationsandmethodsoftest : Part1:Introductionandgeneraltestmethods Part2:Barytes(naturalbariumsulfate) Part3:Blancfixe Part4:Whiting Part5:Naturalcrystallinecalciumcarb
17、onate Part6:Precipitatedcalciumcarbonate Part7:Dolomite Part8:Naturalclay Part9:Calcinedclay Part10:Naturaltalc/chloriteinlamellarform Part11:Naturaltalc,inlamellarform,containingcarbonates Part12:Muscovitetypemica Part13:Naturalquartz(ground) Part14:Cristobalite Part15:Vitreoussilica Part16:Alumini
18、umhydroxides EN ISO 3262-8:1999)E(9991:82623OSI OSI iv Part17:Precipitatedcalciumsilicate Part18:Precipitatedsodiumaluminiumsilicate Part19:Precipitatedsilica Part20:Fumedsilica Part21:Silicasand(ungroundnaturalquartz) Part22:Kieselguhr EN ISO 3262-8:1999INTERNATIONALSTANDARD ISO ISO32628:1999(E) 1
19、ExtendersforpaintsSpecificationsandmethodsoftest Part8: Naturalclay 1Scope ThispartofISO3262specifiesrequirementsandcorrespondingmethodsoftestfornaturalclay. 2Normative references Thefollowingnormativedocumentscontainprovisionswhich,throughreferenceinthistext,constituteprovisionsof thispartofISO3262
20、.Fordatedreferences,subsequentamendmentsto,orrevisionsof,anyofthesepublications donotapply.However,partiestoagreementsbasedonthispartofISO3262areencouragedtoinvestigatethe possibilityofapplyingthemostrecenteditionsofthenormativedocumentsindicatedbelow.Forundated references,thelatesteditionofthenorma
21、tivedocumentreferredtoapplies.MembersofISOandIECmaintain registersofcurrentlyvalidInternationalStandards. ISO7872:1981, GeneralmethodsoftestforpigmentsandextendersPart2:Determinationofmattervolatileat 105 C. ISO7873: 1) ,GeneralmethodsoftestforpigmentsandextendersPart3:Determinationofmattersolublein
22、 waterHotextractionmethod. ISO7877:1981, GeneralmethodsoftestforpigmentsandextendersPart7:Determinationofresidueon sieveWatermethodManualprocedure. ISO7879:1981, GeneralmethodsoftestforpigmentsandextendersPart9:DeterminationofpHvalueofan aqueoussuspension. ISO78714:1973, Generalmethodsoftestforpigme
23、ntsPart14:Determinationofresistivityofaqueousextract. ISO32621:1997, ExtendersforpaintsSpecificationsandmethodsoftestPart1:Introductionandgeneraltest methods. ISO3696:1987, Waterforanalyticallaboratoryuse Specificationandtestmethods. ISO15528: 2) , PaintsandvarnishesSampling . 1)Tobepublished.(Revis
24、ionofISO7873:1979) 2)Tobepublished.(RevisionofISO842:1984andISO1512:1991) EN ISO 3262-8:1999)E(9991:82623OSI OSI 2 3 Termanddefinition ForthepurposesofthispartofISO3262,thefollowingtermanddefinitionapply: 3.1 naturalclay naturallyoccurringhydratedaluminiumsilicateswithalamellarcrystalstructure,predo
25、minantlyconsistingof kaoliniteofchemicalcompositionAl 2 O 3 2SiO 2 2H 2 O Al 4 (OH) 8 /Si 4 O 10 4 Requirementsandtestmethods FornaturalclaycomplyingwiththispartofISO3262,theessentialrequirementsarespecifiedinTable1andthe conditionalrequirementsarelistedinTable2. Table1Essentialrequirements Characte
26、ristic Unit Requirement Testmethod GradeA GradeB GradeC GradeD Kaolinitecontent,min. %( m/m) 90 85 70 50 Xraydiffractionorto beagreedbetween theinterestedparties Residueon45msieve, max. %( m/m) 0,02 0,05 0,1 0,5 ISO7877 Particlesizedistribution (Andreasenmethod), ,2m,min. %( m/m) 90 70 40 20 Seeclau
27、se6 Mattervolatileat105 C, max. %( m/m) 1 ISO7872 a Lossonignition %( m/m) 12to14 11to14 10to14 6to9 ISO32621 Mattersolubleinwater(hot extractionmethod),max. %( m/m) 0,3 0,5 ISO7873 pHvalueofaqueous suspension 4to9 ISO7879 a Byagreementbetweentheinterestedparties,testportionsotherthan10gmaybeused. T
28、able2Conditionalrequirements Characteristic Unit Requirement Testmethod Particlesizedistribution (instrumentalmethod) %( m/m) Tobeagreed betweenthe interestedparties a Colour Tobeagreedbetweentheinterestedparties ISO32621 Lightness Tobeagreed betweenthe interestedparties b Reistivityofaqueousextract
29、 Wm ISO78714 a AgeneraldescriptionofasedimentationmethodusingXrayabsorptionisgiveninEN7255:1996, Advancedtechnicalceramics MethodsoftestforceramicpowdersPart5:Determinationoftheparticlesizedistribution. b Testmethodinpreparation. EN ISO 3262-8:1999OSI )E(9991:82623OSI 3 5Sampling Takearepresentative
30、sampleoftheproducttobetested,asdescribedinISO15528. 6 Determinationofparticlesizedistribution 6.1General Becauseofitssimpleprocedureandgoodreproducibility,theAndreasenmethod 3) isgivenastherefereemethod. Othermethodsmay,however,beusedbyagreementbetweentheinterestedparties,butinsuchcasesitwillbe nece
31、ssarytoagreeonappropriatelimits. 6.2Principle Therateoffallofsphericalparticlesthroughamediuminwhichtheyaredispersedisproportionaltothesquareof theparticlediameter(Stokeslaw).TheAndreasenmethodfordeterminationofparticlesizedistributionmakesuse ofthisrelationship,expressingtheparticlesizedistribution
32、intermsofthedistributionofsphericalparticleshaving thesamesettlementrate.Asuspensionispreparedandtheconcentrationofsolidsatafixeddistancebelowthe surfaceisdeterminedataseriesoftimeintervalsselectedtocorrespondtoaseriesofgivenspherediameters. 6.3Reagents Useonlyreagentsofrecognizedanalyticalgradeando
33、nlywaterofatleastgrade3purityasdefinedinISO3696. 6.3.1Dispersingagent: Dissolve0,2gofsodiumcarbonateand0,1gofsodiumhexametaphosphatein750mlof water. 6.4Apparatus (seeFigure1) Useordinarylaboratoryapparatusandglassware,togetherwiththefollowing: 6.4.1Sedimentation vessel, glass,of56mminternaldiametera
34、ndhavingagraduatedscalefrom0mmto 200mmmarkedonitsside.Thezerograduationlineshallbenotlessthan25mmfromtheinsideofthebaseofthe vessel,andthecapacityofthevesseluptothe200mmlineshallbebetween550mland620ml. 6.4.2Pipette, fittedwithatwowaytapandasidedischargetube. NOTE Thecapacityofthepipettetothegraduati
35、onlineisconveniently10ml. Abellshapeddomewithagroundglassjointtofittheneckofthesedimentationvesselshallbefusedtothe pipette.Asmallventholeshallbemadeinthisdome.Thetipofthepipettestemshallbelevelwiththezerolineon thesedimentationvessel.Thestemfromthepipettebulbtothetipshallbemadeofcapillaryglasstubin
36、gwitha borenotlessthan1mmandnotmorethan1,3mmindiameter.Thetubeabovethebulbshallhaveaboreof4mm to4,5mmindiameter. 6.4.3Constanttemperaturebath, ofatleast15lcapacity,havingtransparentwalls,capableofbeingmaintained atatemperatureof(230,5) C,intowhichthesedimentationvesselcanbeimmerseduptothe200 mm grad
37、uationline.Thebathshallbepositionedawayfromsourcesofvibration,andthecirculatingsystemshallnot causevibration. 6.4.4Mechanicalstirrer, capableofrotatingatasuitablespeedforcompletedispersion(1 000 100)min 21 is generallysuitable.Thestirrershallbecapableofliftingthedispersionandavoidingthecreationofavo
38、rtex. NOTE Asuitablestirrermaybemadefromanapproximately40mmdiameterbrassdiscwithfourequallyspacedcuts,the cutsectionsbeingturnedupwardsatanangleof30 tothehorizontal. 6.4.5Dispersionvessel, ofappropriatedimensions,suchasa1 000mlgasjar. 3)Andreasen,A.H.M.,Lundberg,I;“BerichteausderdeutschenKeramischen
39、Gesellschaft“ 11(1930),5,pp.312323. EN ISO 3262-8:1999)E(9991:82623OSI OSI 4 Figure1Sedimentationvesselandpipette 6.4.6Analyticalbalance, capableofweighingto0,1mg. 6.4.7Drying oven, capableofbeingmaintainedwithinatemperaturerangesuitableforevaporationofthe suspendingliquid,forexample(105 2) Cforwate
40、r. 6.4.8Widemouthed weighing bottles, suitableforevaporation,ofcapacitynotlessthan20ml,orasmall laboratorycentrifugeandcentrifugetubes,preferablyof20mlcapacitybutofnotlessthan10mlcapacity. 6.4.9Stopwatch or stopclock. 6.5 Preparationforthetest 6.5.1 Calibrationofpipette Thoroughlycleanthepipette(6.4
41、.2).Partlyfillthesedimentationvessel(6.4.1)withdistilledwater.Setthetapinthe samplingpositionand,bymeansofarubbertube,suckwaterintothebulbtothelevelofthegraduationline. Reversethetaptothedischargepositionandallowthewatertodrainintoataredweighingbottle(6.4.8).Apply EN ISO 3262-8:1999OSI )E(9991:82623
42、OSI 5 pressurethroughtherubbertubetoblowanywaterremaininginthebulbandthedischargetubeintotheweighing bottle.Weighthebottletothenearest1mgandcalculatefromthismasstheinternalvolume V p ofthepipette. 6.5.2 Calibrationofsedimentationvessel Thoroughlycleanthesedimentationvessel(6.4.1),andweighit,withthep
43、ipette(6.4.2)inplace,tothenearest 0,1g.Thenfillittothe200mmgraduationlinewithwaterat(23 0,5) Candreweigh.Calculatefromthemassof watertheinternalvolume V s ofthevessel. 6.6Procedure 6.6.1 Numberofdeterminations Carryoutthedeterminationinduplicate. 6.6.2Test portion Weigh,tothenearest1mg,about12gofthesample.Prepareasuspensionbyplacingthistestportioninthe dispersionvessel(6.4.5),addingdispersingagent(6.3.1)at(23 0,5) Ctogiveatotalvolumeofabout500mland stirringwiththemechanicalstirrer(6.4.4)for15
