1、BSI Standards PublicationBS EN ISO 8623:2015Tall-oil fatty acids for paintsand varnishes Test methodsand characteristic valuesBS EN ISO 8623:2015 BRITISH STANDARDNational forewordThis British Standard is the UK implementation of EN ISO 8623:2015. It supersedes BS EN ISO 8623:2010 which is withdrawn.
2、The UK participation in its preparation was entrusted to Technical Committee STI/3, Paints, media and related products.A list of organizations represented on this committee can be obtained on request to its secretary.This publication does not purport to include all the necessary provisions of a cont
3、ract. Users are responsible for its correct application. The British Standards Institution 2015. Published by BSI Standards Limited 2015ISBN 978 0 580 83753 1 ICS 87.060.99 Compliance with a British Standard cannot confer immunity from legal obligations.This British Standard was published under the
4、authority of the Standards Policy and Strategy Committee on 30 September 2015.Amendments/corrigenda issued since publicationDate Text affectedEUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN ISO 8623 September 2015 ICS 87.060.99 Supersedes EN ISO 8623:2010English Version Tall-oil fatty acids for
5、 paints and varnishes - Test methods and characteristic values (ISO 8623:2015) Acides gras de tall-oil pour peintures et vernis - Mthodes dessai et valeurs caractristiques (ISO 8623:2015) Talll-Fettsuren fr Beschichtungsstoffe - Prfverfahren und Kennwerte (ISO 8623:2015) This European Standard was a
6、pproved by CEN on 31 July 2015. 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 nationa
7、l standards may be obtained on application to the CEN-CENELEC Management Centre 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
8、 and notified to the CEN-CENELEC Management Centre has the same status as the official versions. CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hu
9、ngary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey andUnited Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG CEN-CEN
10、ELEC Management Centre: Avenue Marnix 17, B-1000 Brussels 2015 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN ISO 8623:2015 EBS EN ISO 8623:2015EN ISO 8623:2015 (E) 3 European foreword This document (EN ISO 8623:2015) has been pre
11、pared by Technical Committee ISO/TC 35 “Paints and varnishes” in collaboration with Technical Committee CEN/TC 139 “Paints and varnishes” 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
12、 endorsement, at the latest by March 2016, and conflicting national standards shall be withdrawn at the latest by March 2016. Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. CEN and/or CENELEC shall not be held responsible for ide
13、ntifying any or all such patent rights. This document supersedes EN ISO 8623:2010. According to the CEN-CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Repu
14、blic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom. Endo
15、rsement notice The text of ISO 8623:2015 has been approved by CEN as EN ISO 8623:2015 without any modification. BS EN ISO 8623:2015ISO 8623:2015(E)Foreword ivIntroduction v1 Scope . 12 Normative references 13 Test methods and characteristic values . 1Annex A (normative) Determination of unsaponifiab
16、le matter (Diethyl ether method) 2Annex B (normative) Determination of rosin acid content 5 ISO 2015 All rights reserved iiiContents PageBS EN ISO 8623:2015ISO 8623:2015(E)ForewordISO (the International Organization for Standardization) is a worldwide federation of national standards bodies (ISO mem
17、ber 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 the right to be represented on that committee. International organizations, governmen
18、tal 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.The procedures used to develop this document and those intended for its further maintenance
19、are described in the ISO/IEC Directives, Part 1. In particular the different approval criteria needed for the different types of ISO documents should be noted. This document was drafted in accordance with the editorial rules of the ISO/IEC Directives, Part 2 (see www.iso.org/directives).Attention is
20、 drawn to the possibility that some of the elements of this document may be the subject of patent rights. ISO shall not be held responsible for identifying any or all such patent rights. Details of any patent rights identified during the development of the document will be in the Introduction and/or
21、 on the ISO list of patent declarations received (see www.iso.org/patents).Any trade name used in this document is information given for the convenience of users and does not constitute an endorsement.For an explanation on the meaning of ISO specific terms and expressions related to conformity asses
22、sment, as well as information about ISOs adherence to the WTO principles in the Technical Barriers to Trade (TBT) see the following URL: Foreword - Supplementary informationThe committee responsible for this document is ISO/TC 35, Paints and varnishes, Subcommittee SC 10, Test methods for binders fo
23、r paints and varnishes.This second edition cancels and replaces the first edition (ISO 8623:1997), which has been technically revised with the following changes: the former requirements were changed to information on characteristic values; the data for unsaponifiable matter content was changed from
24、mass fraction of max. 2,5 % to max. 5 %; the method for the determination of the unsaponifiable matter (diethyl ether method) was implemented from the 1980 edition of ISO 150 because it is no longer included in the actual revision of ISO 150, i.e. ISO 150:2006; the concentration of phenolphthalein i
25、ndicator solution was changed from 10 g/l in ethanol to 5 g/l in ethanol or in a 1:1 ethanol/water mixture.iv ISO 2015 All rights reservedBS EN ISO 8623:2015ISO 8623:2015(E)IntroductionNormally, requirements are agreed between the interested parties. So with this new edition, this International Stan
26、dard no longer specifies requirements but only test methods and gives information on characteristic values for tall-oil fatty acids. ISO 2015 All rights reserved vBS EN ISO 8623:2015BS EN ISO 8623:2015Tall-oil fatty acids for paints and varnishes Test methods and characteristic values1 ScopeThis Int
27、ernational Standard specifies test methods and gives information on characteristic values for distilled tall-oil fatty acids for paints and varnishes.2 Normative referencesThe following documents, in whole or in part, are normally referenced in this document and are indispensable for its application
28、. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.ISO 383, Laboratory glassware Interchangeable conical ground jointsISO 2114, Plastics (polyester resins) and paints and varnishes (binders)
29、 Determination of partial acid value and total acid valueISO 2811 (all parts), Paints and varnishes Determination of densityISO 3681, Binders for paints and varnishes Determination of saponification value Titrimetric methodISO 3696, Water for analytical laboratory use Specification and test methodsI
30、SO 3961, Animal and vegetable fats and oils Determination of iodine valueISO 4630, Clear liquids Estimation of colour by the Gardner colour scale3 Test methods and characteristic valuesTest methods and typical characteristic values for tall-oil fatty acids for paints and varnishes are given in Table
31、 1.Table 1 Test methods and characteristic values for tall-oil fatty acidsProperty Characteristic value Test methodDensityat 20 C g/cm30,900 to 0,910ISO 2811at 23 C g/cm30,898 to 0,908Colour max. 5 ISO 4630Acid value mg KOH/g min. 192 ISO 2114Saponification value mg KOH/g min. 193 ISO 3681Iodine val
32、ue g Iodine /100 g min. 125 ISO 3961Unsaponifiable matter % (mass fraction) max. 5 Annex ARosin acid content % (mass fraction) max. 2,5 Annex BINTERNATIONAL STANDARD ISO 8623:2015(E) ISO 2015 All rights reserved 1BS EN ISO 8623:2015ISO 8623:2015(E)Annex A (normative) Determination of unsaponifiable
33、matter (Diethyl ether method)A.1 GeneralThis test method is applicable to all fats. It is, however, only approximate for certain fats having high content of unsaponifiable matter.A.2 Terms and definitionsA.2.1unsaponifiable mattersubstances soluble in the fat, which after saponification are insolubl
34、e in water but soluble in the solvent used for the determinationNote 1 to entry It includes lipids of natural origin such as sterols, alcohols and hydrocarbons as well as any foreign organic matter non-volatile at 100 C (mineral oils) which may be present.A.3 ApparatusUse ordinary laboratory apparat
35、us and glassware, together with the following:A.3.1 150 ml flask fitted with a reflux condenser.A.3.2 500 ml separating funnels.A.3.3 Oven, regulated at (103 2) C.A.4 ReagentsDuring the analysis, use only reagents of recognized analytical grade and only water of at least grade 3 as defined in ISO 36
36、96.A.4.1 Aqueous solution of potassium hydroxide, c (KOH) = 28 g/l.A.4.2 Ethanolic solution of potassium hydroxide, c (KOH) 112 g/l.Dissolve 120 g potassium hydroxide in ethanol, c (C2H5OH) = 95 % volume fraction, and make up to 1 l. The reagent shall not be darker than straw yellow.A.4.3 Diethyl et
37、her, free from residue.NOTE Diethyl ether is used as a solvent which generally gives higher result than light petroleum solvents.2 ISO 2015 All rights reservedBS EN ISO 8623:2015ISO 8623:2015(E)A.5 ProcedureWeigh about 5 g of fat to within 0,01 g into the flask (A.3.1).Add 50 ml of the ethanolic pot
38、assium hydroxide solution (A.4.2). Attach the condenser. Boil gently for an hour.When heating is completed, wait for the solution to cool down and disconnect the condenser. Transfer the contents of the flask into a separating funnel (A.3.2), rinsing the flask with distilled water (100 ml in all). Tr
39、ansfer this water also in the separating funnel.Rinse the flask and the condenser with 100 ml of diethyl ether and pour this into the separating funnel. Stopper and shake vigorously. While the contents are still slightly warm, hold vertically until there is a clean separation of the two layers. If a
40、n emulsion forms due to excess of alkalinity of the medium, add a few drops of hydrochloric acid, c (HCl) 37 g/l.Draw off the aqueous ethanolic layer into the flask used for saponification.Pour the ethereal extract through the neck of the funnel into another separating funnel containing 40 ml of wat
41、er.Using the first separation funnel, extract the aqueous ethanolic soap solution twice more, each time in the same way with 100 ml diethyl ether, and combine the ethereal fractions in the second funnel. If this ethereal solution contains suspended solid matter, filter carefully and wash the residue
42、 and the filter with a little diethyl ether to remove all soluble matter.Rotate the funnel containing the combined extracts and the 40 ml of water without violent shaking and after the layers have separated draw off the wash water. Wash the ethereal solution twice with 40 ml water, shaking vigorousl
43、y each time. Then, wash successively with 40 ml of the aqueous potassium hydroxide solution (A.4.1), 40 ml of water, and again with 40 ml of the aqueous potassium hydroxide solution (A.4.1), then at least twice more with 40 ml of water.Continue to wash with water until the wash-water no longer gives
44、 a pink colour on the addition of a drop of phenolphthalein solution.Pour off the ethereal solution quantitatively, a little at a time through the top of the separating funnel (washing the funnel with the solvent) into a 500 ml tared flask, and evaporate to small volume.Add 6 ml of acetone, and remo
45、ve the volatile solvent completely in a gentle current of air, holding the flask obliquely while turning it in a boiling water bath in which it is almost entirely submerged.Complete the drying in a 103 C oven (A.3.3) for 15 min, placing the flask in a horizontal position. Weigh after cooling in a de
46、siccator.Repeat the drying for successive 15 min periods until the loss of mass between two successive weighings is less than 0,1 %.After weighing the residue, dissolve it in 20 ml of freshly distilled and neutralized ethanol c (C2H5OH) = 95 % volume fraction. Titrate with alcoholic KOH solution, c
47、(KOH) = 0,1 mol/l, in the presence of phenolphthalein. If the volume used exceeds 0,2 ml, the determination shall be repeated. ISO 2015 All rights reserved 3BS EN ISO 8623:2015ISO 8623:2015(E)A.6 Expression of resultsCalculate the unsaponifiable matter, expressed as a mass fraction in percent, using
48、 the following formula:Unsaponifiable matter =10010mm(A.1)wherem0is the mass of the test portion, in grams;m1is the mass of the residue, in grams.4 ISO 2015 All rights reservedBS EN ISO 8623:2015ISO 8623:2015(E)Annex B (normative) Determination of rosin acid contentB.1 PrincipleA test portion is tre
49、ated with butanol sulphuric acid esterification reagent under specified conditions and subsequently titrated against a standard volumetric potassium hydroxide solution, using phenolphthalein as indicator. The rosin acid content is calculated in terms of abietic acid.B.2 ApparatusUse ordinary laboratory apparatus and glassware, together with the following:B.2.1 Air condenser, 760 mm long, with a 24/29 ground glass cone.B.2.2 Burette, automatic type, having a capacity of 25 ml, for the standar
