1、BRITISH STANDARD BS EN ISO 11908:1998 BS 6782-8: 1996 Implementing Amendment No.1 to BS6782-8:1996 (renumbers the BS as BS ENISO11908: 1998), not published separately Binders for paints and varnishes Amino resins General methods of test ICS 87.060.20BSENISO11908:1998 This British Standard, having be
2、en prepared under the directionof the Sector Board forMaterials and Chemicals, waspublished under the authorityof the Standards Boardand comes intoeffecton 15November1996 BSI 05-1999 The following BSI references relate to the work on this standard: Committee reference STI/3 Draft for comment 92/5669
3、5 DC ISBN 0 580 26480 7 Committees responsible for this British Standard The preparation of this British Standard was entrusted to Technical Committee STI/3, Paints, media and related products, upon which the following bodies were represented: British Coatings Federation Ltd. European Resin Manufact
4、urers Association FOSFA International Ministry of Defence Oil and Colour Chemists Association Seed Crushers and Oil Processors Association Amendments issued since publication Amd. No. Date Comments 10178 October1998 Indicated by a sideline in the marginBSENISO11908:1998 BSI 05-1999 i Contents Page C
5、ommittees responsible Inside front cover National foreword ii Foreword 2 1 Scope 3 2 Normative references 3 3 Definition 3 4 Properties and test methods 3 Annex A (normative) Test for compatibility withhydrocarbons (turbidity titration) 4 Annex ZA (normative) Normative references toInternational pub
6、licationswiththeir relevantEuropean publications 5 Table 1 Properties and test methods 3 List of references Inside back coverBSENISO11908:1998 ii BSI 05-1999 National foreword This Part of BS6782 has been prepared by Technical Committee STI/3. It is identical with ISO11908:1996 Binders for paints an
7、d varnishes Amino resins General methods of test, published by the International Organization for Standardization (ISO). In1998 the European Committee for Standardization (CEN) accepted ISO11908:1996 as European Standard EN ISO11908:1998. Cross-references The Technical Committee has reviewed the pro
8、visions of ISO3679:1983, ISO6271:1981 and ISO9020:1994 to which normative reference is made in the text, and has decided that they are acceptable for use in conjunction with this standard. British Standards related to ISO3679:1983 and ISO9020:1994 are BSEN456:1991 and BS6782-7:1995 respectively. A B
9、ritish 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. Publication referred to Corresponding Britis
10、h Standard ISO842:1994 BS4726:1986 Methods for sampling raw materials for paints and varnishes (Identical) BS3900: Methods of test for paints ISO1523:1983 Part A9:1986 Determination of flashpoint (closed cup equilibrium method) (Identical) ISO2811:1974 Part A12:1975 Determination of density (Technic
11、ally equivalent) ISO3219:1993 BS EN ISO3219:1995 Plastics. Polymers/resins in the liquid state or as emulsions or dispersions. Determination of viscosity using a rotational viscometer with defined shear state (Identical) ISO3251:1993 BS EN ISO3251:1995 Paints and varnishes. Determination of non-vola
12、tile matter of paints, varnishes and binders for paints and varnishes (Identical) BS6782: Binders for paints ISO3682:1996 Part 3:1996 Method for determination of acid value (titrimetric method) (Identical) ISO4630:1981 Part 5:1987 Method for estimation of colour of clear liquids by the Gardner colou
13、r scale (Identical) Summary of pages This document comprises a front cover, an inside front cover, pagesi andii, theENISO title page, pages2 to6, an inside back cover and a back cover. This standard has been updated (see copyright date) and may have had amendments incorporated. This will be indicate
14、d in the amendment table on the inside front cover.EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN ISO11908 April1998 ICS 35.100 Descriptors: Paints, varnishes, binders (materials), synthetic resins, aminoplasts, tests, physical tests, chemical tests English version Binders for paints and varni
15、shes Amino resins General methods of test (ISO11908:1996) Liants pour peintures et vernis Rsines aminoplastes Mthodes gnrales dessai (ISO11908:1996) Bindemittel fr Beschichtungsstoffe Aminharze Allgemeine Prfverfahren (ISO11908:1996) This European Standard was approved by CEN on26 March1998. CEN mem
16、bers 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 standards may be obtained on applicat
17、ion 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 notified to the Central Secretariat has the
18、same status as the official versions. CEN members are the national standards bodies of Austria, Belgium, CzechRepublic, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom. CEN European Committee
19、 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 ISO11908:1998 EENISO11908:1998 BSI 05-
20、1999 2 Foreword The text of the International Standard from ISO/TC35, Paints and varnishes, of the International Organization for Standardization (ISO) has been taken over as a European Standard by Technical Committee CEN/TC139, Paints and varnishes, the secretariat of which is held by DIN. This Eur
21、opean Standard shall be given the status of a national standard, either by publication of an identical text or by endorsement, at the latest by October1998, and conflicting national standards shall be withdrawn at the latest by October1998. According to CEN/CENELEC Internal Regulations, the followin
22、g 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 theUnitedKingdom. Endorsement notice The text of the International
23、 Standard ISO11908:1996 has been approved by CEN as a European Standard without any modification. NOTENormative references to International Standards are listed in Annex ZA (normative).BSENISO11908:1998 BSI 05-1999 3 1 Scope This International Standard details general test methods for amino resins a
24、nd solutions of amino resins intended for use as binders in paints, varnishes and related products. 2 Normative references The following standards contain provisions which, through reference in this text, constitute provisions of this International Standard. At the time of publication, the editions
25、indicated were valid. All standards are subject to revision, and parties to agreements based on this International Standard are encouraged to investigate the possibility of applying the most recent editions of the standards indicated below. Members of IEC and ISO maintain registers of currently vali
26、d International Standards. ISO842:1984, Raw materials for paints and varnishes Sampling. ISO1523:1983, Paints, varnishes, petroleum and related products Determination of flashpoint Closed cup equilibrium method. ISO2811:1974, Paints and varnishes Determination of density. ISO3219:1993, Plastics Poly
27、mers/resins in the liquid state or as emulsions or dispersions Determination of viscosity using a rotational viscometer with defined shear rate. ISO3251:1993, Paints and varnishes Determination of non-volatile matter of paints, varnishes and binders for paints and varnishes. ISO3679:1983, Paints, va
28、rnishes, petroleum and related products Determination of flashpoint Rapid equilibrium method. ISO3682:1996, Binders for paints and varnishes Determination of acid value Titrimetric method. ISO4630:1981, Binders for paints and varnishes Estimation of colour of clear liquids by the Gardner colour scal
29、e. ISO6271:1981, Clear liquids Estimation of colour by the platinum-cobalt scale. ISO9020:1994, Binders for paints and varnishes Determination of free-formaldehyde content of amino resins Sodium sulfite titrimetric method. 3 Definition For the purposes of this International Standard, the following d
30、efinition applies. 3.1 amino resin synthetic resin resulting from the condensation of melamine or urea or their derivatives such as benzoguanamine with formaldehyde. These resins are often etherified with alcohols 4 Properties and test methods Unless otherwise agreed, the properties to be measured a
31、nd the test methods to be used shall be as given in Table 1. Table 1 Properties and test methods Property Test method Colour Viscosity Non-volatile matter a Flashpoint a Density Free-formaldehyde content Compatibility with hydrocarbons (turbiditytitration) a Acid value ISO6271 (Platinum-cobalt scale
32、) or ISO4630 (Gardner colour scale) ISO3219 ISO3251 ISO1523 or ISO3679 ISO2811 ISO9020 Annex A of this International Standard ISO3682 a For resin solutions only.BSENISO11908:1998 4 BSI 05-1999 Annex A (normative) Test for compatibility with hydrocarbons (turbidity titration) A.1 Principle The compat
33、ibility with hydrocarbons is tested by titration of the resin solution at a temperature of20C to25C with a mixture of heptane and toluene until the solution becomes turbid. A.2 Reagents A.2.1 Heptane/toluene mixture Mix80 parts by volume of analytical-grade heptane with20 parts by volume of analytic
34、al-grade toluene. A.3 Apparatus Ordinary laboratory apparatus and glassware. A.4 Sampling Take a representative sample of the product to be tested, as described in ISO842. A.5 Procedure Weigh, to the nearest0,01g, about2g (mass m) of the resin solution into a50ml conical flask. Titrate the solution
35、with the mixture of heptane and toluene(A.2.1) until a faint bluish haze, just off perfect clarity, occurs for the first time. Note the volume of the mixture required (volume V). A.6 Expression of results Calculate the compatibility characteristic c, expressed in millilitres of heptane/toluene mixtu
36、re per gram of resin solution, using the following equation: where A.7 Precision A.7.1 Repeatability, r The value below which the absolute difference between two test results, each the mean of duplicates, obtained on identical material by one operator in one laboratory within a short interval of tim
37、e using the standardized test method, may be expected to lie with a95% probability is5%. A.7.2 Reproducibility, R The value below which the absolute difference between two test results, each the mean of duplicates, obtained on identical material by operators in different laboratories using the stand
38、ardized test method, may be expected to lie with a95% probability is10%. A.8 Test report The test report shall contain at least the following information: a) all details necessary to identify the product tested; b) a reference to this International Standard (ISO11908); c) the result of the test, as
39、indicated in clauseA.6; d) any deviation from the test method specified; e) the date of the test. V is the volume, in millilitres, of heptane/toluene mixture used; m is the mass, in grams, of resin solution taken. c V m - =ENISO11908:1998 BSI 05-1999 5 Annex ZA (normative) Normative references to in
40、ternational publications with their relevent European publications This European Standard incorporates by dated or undated reference, provisions from other publications. These normative references are cited at the appropriate places in the text and the publications are listed hereafter. For dated re
41、ferences, subsequent amendments to or revisions of any of these publications apply to this European Standard only when incorporated in it by amendment or revision. For undated references the latest edition of the publication referred to applies. Publication Year Title EN Year ISO3219 1993 Plastics P
42、olymers/resins in the liquid state orasemulsions or dispersions Determinationofviscosity using a rotational viscometer with defined shear rate EN ISO3219 1994 ISO3251 1993 Paints and varnishes Determination of non-volatile matter of paints, varnishes and binders for paints and varnishes EN ISO3251 1
43、995 ISO3679 1983 Paints, varnishes, petroleum and related products Determination of flashpoint Rapidequilibrium method EN456 19916 blankBSENISO11908:1998 BSI 05-1999 List of references See national foreword.BS EN ISO 11908:1998 BS 6782-8: 1996 BSI 389 Chiswick High Road London W4 4AL BSIBritishStand
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