ISO-8623-1997.pdf
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1、INTERNATIONAL STANDARD IS0 8623 First edition 1997-02-l 5 Tall-oil fatty acids for paints and varnishes - Specifications and test methods Aides gras d huile de tall pour peintures et vernis - Spkcifications et nkthodes d essai Reference number IS0 8623: 1997(E) Copyright International Organization f
2、or Standardization Provided by IHS under license with ISO Licensee=NASA Technical Standards 1/9972545001 Not for Resale, 04/24/2007 23:16:38 MDTNo reproduction or networking permitted without license from IHS -,-,- IS0 8623: 1997(E) Foreword IS0 (the International Organization for Standardization) i
3、s 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 represe
4、nted 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. Draft International Standard
5、s 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 casting a vote. International Standard IS0 8623 was prepared by Technical Committee lSO/TC 35, Paints and varnishes.
6、Annex A of this International Standard is for information only. 0 IS0 1997 All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form or by any means, electronic or mechanical, including photocopying and microfilm, without permission in wri
7、ting from the publisher. International Organization for Standardization Case postale 56 l CH-1211 Geneve 20 l Switzerland Internet: centraliso.ch x.400: c=ch; a=400net; p=iso; o=isocs; s=central Printed in Switzerland ii Copyright International Organization for Standardization Provided by IHS under
8、license with ISO Licensee=NASA Technical Standards 1/9972545001 Not for Resale, 04/24/2007 23:16:38 MDTNo reproduction or networking permitted without license from IHS -,-,- INTERNATIONAL STANDARD 0 IS0 IS0 8623: 1997(E) Tall-oil fatty acids for paints and varnishes - Specifications and test methods
9、 1 Scope This International Standard specifies the requirements and the corres- ponding test methods for distilled tall-oil fatty acids for paints and varnishes. 2 Normative references The following standard contains provisions which, through reference in this text, constitute provisions of this Int
10、ernational Standard. At the time of publication, the edition indicated was valid. All standards are subject to revision, and parties to agreements based on this Internatio- nal Standard are encouraged to investigate the possibility of applying the most recent ecition of the standard indicated below.
11、 Members of IEC and IS0 maintain registers of currently valid International Standards. IS0 150:1980, Raw, refined and boiled linseed oil for paints and varnis- hes - Specifications and methods of test. IS0 383:1976, Laboratory glassware - Interchangeable conical ground joints. IS0 842:1984, Raw mkte
12、ri$ls for paints And varnishes - Sampling. IS0 2811:1974, Paints and varnishes - Determination of density. IS0 3681:1983, Binders for paints and varnishes - Determination of saponification value - Titrimetric method. IS0 3682:1983, Binders for paints and varnishes - Determination of acid value - Tit
13、rimetric method. IS0 3696:1987, Water for laboratory use - Specification and test methods. IS0 3961:1989, Animal and vegetable oils and fats - Determination of iodine value IS0 4630:1981, Binders for paints and varnishes - Estimation of colour of clear liquids by the Gardner colour scale 3 Requireme
14、nts and test methods Tall-oil fatty acids shall comply with the requirements given in table 1. 1 Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=NASA Technical Standards 1/9972545001 Not for Resale, 04/24/2007 23:16:38 MDTNo reproduction or ne
15、tworking permitted without license from IHS -,-,- IS0 8623: 1997(E) 0 IS0 Table 1 - Requirements and test methods Property Requirement Test method at 20 C g/ml 0,900 to 0,910 Density IS0 2811 at 23 C! g/ml 0,898 to 0,908 Colour Acid value Saponification mg KOH/g w KOH/g max. 5 min. 192 min. 193 IS0
16、4630 (Gardner scale) IS0 3682 IS0 3681 Iodine value g Iodine/I00 g min. 125 IS0 3961 (Wijs method) Unsaponifiable matter Rosin acid content 0 (m/m) max. 2,5 IS0 150, Annex % (m/m) max. 2,5 Clause 4 4 Determination of rosin acid content 4.1 Principle A test portion is treated with butanol sulfuric ac
17、id 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. 4.2 Reasents During the analysis, use only reagents of recogni
18、zed analytical grade and only water of at least grade 3 purity as defined in IS0 3696. 4.2.1 Butanol Sulfuric acid esterification reagent Introduce 500 ml of n-butanol, 500 ml of toluene and 3,3 ml of concen- trated sulfuric acid, p = 1,84 g/ml, into a 2 1 round-bottom flask with ground-glass neck,
19、connect to a moisture trap and condenser, and reflux on a hotplate for 30 min to distil of the water. Cool and store in a glass-stoppered bottle. 2 Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=NASA Technical Standards 1/9972545001 Not for R
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