1、STD.BS1 BS EN IS0 3262-8-ENGL 2000 = Lb24bb9 I BRITISH STANDARD Extenders for paints - Specifications and methods of test - Part 8: Natural clay The European Standard EN IS0 3262-8:1999 has the status of a British Standard ICs 87.060.10 NO COPYING WiTHOT BSI PERMISSION EXCEPT AS PERMITED BY COPYRIGH
2、T LAW 2932b 2T4 BS EN IS0 I262-8:2000 - STD-BSI BS EN IS0 3262-8-ENGL 2000 Lb24hb9 0829327 I130 BS EN IS0 3262-8:2000 Amd.No. National foreword Date Comments This British Standard is the official English language version of EN IS0 3262-8:1999. It is identical with IS0 326231999. Together with other
3、parts of BS EN IS0 3262, it will supersede BS 1795:1976 which is declared obsolescent. The UK participation in its preparation was entrusted to Technical Committee SW1, Pigments, which has the responsibiiiiy to: - aid enquirers to understand the text; - present to the responsible intemational/Europe
4、an 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 secretary. C
5、ross-references Attention is drawn to the fact that CEN and CENELEC Sandards normally include an annex which lists normative references to international publications with their corresponding European publications. The British Stan- which implement these intemational or European publications may be f
6、ound 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 provisions of a contract. Users of British Standar
7、ds 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, the EN IS0 title page, the EN IS0 foreword page, the IS0 title page, pages ii
8、 to iv, pages 1 to 7, the annex ZA page, and inside back cover and a back cover. The BSI copyri 87.060.1 O English version Extenders for paints - Specifications and methods of test - Part 8: Natural clay (IS0 3262-8:1999) Matires de charge pour peintures - Spcifications et mthodes dessai - Partie 8:
9、 Kaolin naturel (IC0 3262- 8:1999) Fllstoffe fr Beschichtungsctoffe - Anfordeningen und Prverfahren -Teil 8: Natrlicher Kaolin (IS0 3262-8:1999) This European Standard was approved by CEN on 13 August 1999. CEN members are bound to compiy with lhe CEWCENELEC Internai Regulations which stipulate the
10、conditions for giving thls European Standard the status of a national standard without any alteration. Up-to-date lists and bibiiographical references concerning such national standards may be obtained on application to the Central Secretariat or to any CEN member. This European Standard exists in t
11、hree ofcial 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 status as the official versions. CEN members are the national standards bodies of Au
12、stria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece, Iceland. Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzetiand and United Kingdom. EUROPEAN COMMITIFE FOR STANDARDIZATION EUROPISCHES KOMITEE FUR NORMUNG COMITE EUROPBEN DE NORMALISATION Centra
13、l Secretariat: rue de Stassart, 36 B-1050 Brussels O 1999 CEN All rights of exploitation in any fonn and by any means reserved worldwide for CEN national Members. Ref. No. EN IS0 3262-8:1999 E STD-BSI BS EN IS0 3262-8-ENGL 2000 D Lh24hb 0829329 “03 EN IS0 3262-8:1999 Foreword The text of the Interna
14、tional Standard IS0 3262-8:1999 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 national standard, ei
15、ther by publication of an identical text or by endorsement, at the latest by April 2000, and conflicting national standards shall be withdrawn at the latest by April 2000. According to the CEWCENELEC Internal Regulations, the national standards organizations of the following countries are bound to i
16、mplement 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 International Standard IS0 3262-8:19
17、99 was approved by CEN as a European Standard without any modification. NOTE: Normative references to International Standards are listed in annex ZA (normative). STD-BSI BS EN IS0 32b2-8-ENGL 2000 Lb24bb7 0827330 725 EN IS0 3262-8:1999 INTERNATIONAL STANDARD IS0 3262-8 First edition 1999-1 0-01 Exte
18、nders for paints - Specifications and methods of test - Part 8: Natural clay Matires de charge pour peintures - Spcifications et mthodes dessai - Partie 8: Kaolin naturel Reference number IS0 3262-811 999(E) STD-BSI BS EN IS0 3262-ENGL 2000 3624669 0827333 bb3 EN IS0 3262-81999 Contents 1 Scope 1 2
19、Normative references 1 3 Term and definition . 2 4 Requirements and test methods 2 5 Sampling . 3 6 Determination of particle-size distribution 3 7 Test report 6 II STD-BSI BS EN IS0 32b2-8-ENGL 2000 = Lb24bb9 0829332 5T8 EN IS0 3262-81999 Foreword IS0 (the International Organization for Standardiza
20、tion) is a worldwide federation of national standards bodies (IS0 member bodies). The work of preparing International Standards is normally carried out through IS0 technical committees. Each member body interested in a subject for which a technical committee has been established has the right to be
21、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 International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization. International Standard
22、s are drafted in accordance with the rules given in the ISOAEC Directives, Part 3. 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 the member bodies castin
23、g a vote. International Standard IS0 3262-8 was prepared by Technical Committee ISOTTC 35, Paints and varnishes, Subcommittee SC 2, Pigments and extenders. Together with the other parts (see below), this part of IS0 3262 cancels and replaces IS0 3262:1975, which has been technically revised. Part 1
24、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 parts of IS0 3262 are publi
25、shed or in preparation, under the general title Extenders for paints - Specifications and methods of test: - Part 1: Introduction and general fest methods - Part 2: Barytes (natural barium sulfate) - Part 3: Blanc fixe - Part 4: Whiting - Part 5: Natural crystalline calcium carbonate - Part 6: Preci
26、pitated calcium carbonate - Part 7: Dolomite - Part 8: Natural clay - Part 9: Calcined clay - Part 1 O: Natural taldchlorite in lamellar form - Part 1 1: Natural talc, in lamellar form, containing carbonates - Part 72: Muscovite-type mica - Part 13: Natural quartz (ground) - Part 14: Cristobalite -
27、Part 15: Vitreous silica - Part 16: Aluminium hydroxides . 111 STD-BSI BS EN IS0 32b2-8-ENGL 2000 W Lb24bb 0829333 434 9 EN IS0 3262-8:1999 - Part 17: Precipitated calcium silicate - Part 18: Precipitated sodium aluminium silicate - Part 19: Precipitated silica - Part 20: Fumed silica - Part 21: Sil
28、ica sand (unground natural quartz) - Part 22: Kieselguhr iv STDmBSI BS EN IS0 3262-B-ENGL 2000 m Lb24bb7 0829334 370 m EN IS0 3262-8:1999 Extenders for paints - Specifications and methods of test - Part 8: Natural clay 1 scope This part of IS0 3262 specifies requirements and corresponding methods of
29、 test for natural clay. 2 Normative references The following normative documents contain provisions which, through reference in this text, constitute provisions of this pari of IS0 3262. For dated references, subsequent amendments to, or revisions of, any of these publications do not apply. However,
30、 parties to agreements based on this pari of IS0 3262 are encouraged to investigate the possibility of applying the most recent editions of the normative documents indicated below. For undated references, the latest edition of the normative document referred to applies. Members of IS0 and IEC mainta
31、in registers of currently valid International Standards. IS0 787-2:1981, General methods of test for pigments and extenders - Part 2: Determination of matter volatile at 105 “C. IS0 787-3:-), General methods of test for pigments and extenders - Part 3: Determination 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 procedure. IS0 787-9:1981, General methods of test for pigments and extenders - Part 9: Determination of pH value of an aqueous suspension. IS0 78
33、7-1 4:1973, General methods of test for pigments - Part 14: Determination of resistivity of aqueous extract. IS0 3262-1 :1997, Extenders for paints - Specifications and methods of test - Part 7: Introduction and general test methods. IS0 3696:1987, Water for analytical laboratory use - Specification
34、 and test methods. IS0 15528:2), Paints and varnishes - Sampling. 1) To be published. (Revision of IS0 787-3:1979) 2) To be published. (Revision of IS0 842:1984 and IS0 1512:1991) 1 STD-BSI BS EN IS0 32b2-B-ENGL 2000 m Lb24bb9 O29335 207 H EN IS0 3262-8:1999 Characteristic Kaolinite content, min. Re
35、sidue on 45 pm sieve, ma. Particle-size distribution (Andreasen method), 2 pm, min. max. Matter volatile at 105 OC, Loss on ignition Matter soluble in water (hot extraction method), max. suspension pH value of aqueous 3 Term and definition Test method Unit Requirement Grade A Grade B Grade C Grade D
36、 YO (dm) 90 85 70 50 X-ray diffraction or to be agreed between the interested parties YO (mlm) 0,02 0,05 o, 1 03 IS0 787-7 % (mim) 90 70 40 20 See clause 6 % (mlm) 1 IS0 787-Za %(dm) 12t014 11 to14 10 to 14 6 to 9 IS0 3262-1 Y (Am) 03 03 IS0 787-3 4 to 9 IS0 787-9 For the purposes of this part of IS
37、0 3262, the following term and definition apply: Characteristic Particle-size distribution (instrumental method) Colour Lightness Reistivity of aqueous extract 3.1 natural clay naturally occurring hydrated aluminium silicates with a lamellar crystal structure, predominantly consisting of kaolinite o
38、f chemical composition A1203.2Si02.2H20 I A4 (OH)8/Si4010 Unit Requirement Test method % (dm) To be agreed between the interested partiesa To be agreed between the interested parties IS0 3262-1 To be agreed between the interested partiesb Rm IS0 787-14 4 Requirements and test methods For natural cla
39、y complying with this part of IS0 3262, the essential requirements are specified in Table 1 and the conditional requirements are listed in Table 2. Table 1 - Essential requirements 2 STD-BSI BS EN IS0 32b2-8-ENGL 2000 1624bb9 0829336 143 EN IS0 3262-8:1999 5 Sampling Take a representative sample of
40、the product to be tested, as described in IS0 15528. 6 Determination of particle-size distribution 6.1 General Because of its simple procedure and good reproducibility, the Andreasen method3) is given as the referee method. Other methods may, however, be used by agreement between the interested part
41、ies, but in such cases it will be necessary to agree on appropriate limits. 6.2 Principle The rate of fall of spherical particles through a medium in which they are dispersed is proportional to the square of the particle diameter (Stokes law). The Andreasen method for determination of particle-size
42、distribution makes use of this relationship, expressing the particle-size distribution in terms of the distribution of spherical particles having the same settlement rate. A suspension is prepared and the concentration of solids at a fixed distance below the surface is determined at a series of time
43、 intervals selected to correspond to a series of given sphere diameters. 6.3 Reagents Use only reagents of recognized analytical grade and only water of at least grade 3 purity as defined in IS0 3696. 6.3.1 Dispersing agent: Dissolve 0,2 g of sodium carbonate and 0,l g of sodium hexametaphosphate in
44、 750 ml of water. 6.4 Apparatus (see Figure 1) Use ordinary laboratory apparatus and glassware, together with the following: 6.4.1 Sedimentation vessel, glass, of 56 mm internal diameter and having a graduated scale from O mm to 200 mm marked on its side. The zero graduation line shall be not less t
45、han 25 mm from the inside of the base of the vessel, and the capacity of the vessel up to the 200 mm line shall be between 550 ml and 620 ml. 6.4.2 Pipette, fitted with a two-way tap and a side discharge tube. NOTE The capacity of the pipette to the graduation line is conveniently 1 O ml. A bell-sha
46、ped dome with a ground-glass joint to fit the neck of the sedimentation vessel shall be fused to the pipette. A small vent hole shall be made in this dome. The tip of the pipette stem shall be level with the zero line on the sedimentation vessel. The stem from the pipette bulb to the tip shall be ma
47、de of capillary glass tubing with a bore not less than 1 mm and not more than 1,3 mm in diameter. The tube above the bulb shall have a bore of 4 mm to 4,5 mm in diameter. 6.4.3 Constant-temperature bath, of at least 15 I capacity, having transparent walls, capable of being maintained at a temperatur
48、e of (23 k 0,5) OC, into which the sedimentation vessel can be immersed up to the 200 mm graduation line. The bath shall be positioned away from sources of vibration, and the circulating system shall not cause vibration. 6.4.4 Mechanical stirrer, capable of rotating at a suitable speed for complete
49、dispersion (l O00 I 100) min- is generally suitable. The stirrer shall be capable of lifting the dispersion and avoiding the creation of a vortex. NOTE cut sections being turned upwards at an angle of 30“ to the horizontal. A suitable stirrer may be made from an approximately 40 mm diameter brass disc with four equally spaced cuts, the 6.4.5 Dispersion vessel, of appropriate dimensions, such as a 1 O00 ml gas jar. 3) Andreasen, A.H.M., Lundberg, I; “Berichte aus der deutschen Keramischen Gesellschaft“ 11 (1930), 5, pp. 31 2-32
